You searched for subject:(heterogeneous networks).
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University of Waterloo
1.
Fooladivanda, Dariush.
Comparison between Static and Dynamic Modeling Approaches for Heterogeneous Cellular Networks.
Degree: 2014, University of Waterloo
URL: http://hdl.handle.net/10012/8626 
► In order to accommodate growing traffic demands, next generation cellular networks must become highly heterogeneous to achieve capacity gains. Heterogeneous cellular networks composed of macro…
(more)
▼ In order to accommodate growing traffic demands, next generation cellular networks must become highly heterogeneous to achieve capacity gains. Heterogeneous cellular networks composed of macro base stations and low-power base stations of different types are able to improve spectral efficiency per unit area, and to eliminate coverage holes. In such networks, intelligent user association and resource allocation schemes are needed to achieve gains in performance. We focus on heterogeneous cellular networks that consist of macro and pico BSs, and study the interplay between user association and resource allocation using two modeling approaches, namely a static modeling approach and a dynamic modeling approach.
Our first study focuses on modeling heterogeneous cellular networks with a static approach. We propose a unified static framework to study the interplay of user association and resource allocation under a well-defined set of assumptions. This framework allows us to compare the performance of three resource allocation strategies: partially Shared deployment, orthogonal deployment, and co-channel deployment when the user association is optimized. We have formulated joint optimization problems that are non-linear integer programs which are NP-hard. We have, therefore, developed techniques to obtain upper bounds on the system's performance. We also propose a simple association rule that performs much better than all existing user association rules. We have used these upper bounds as benchmarks to provide many engineering insights, and to quantify how well different combinations of user association rules and resource allocation schemes perform.
Our second study focuses on modeling heterogeneous cellular networks with a dynamic modeling approach. We propose a unified framework to study the interplay of user association, resource allocation, user arrival, and delay. We select three different performance metrics: the highest possible arrival rate, the network average delay, and the delay-constrained maximum throughput, and formulate three different optimal user association problems to optimize our performance metrics. The proposed problems are non-linear integer programs which are hard to solve efficiently. We have developed numerical techniques to compute either the exact solutions or tight lower bounds to these problems. We have used these lower bounds and the exact solutions as benchmarks to provide many engineering insights, and to quantify how well different user association rules and resource allocation schemes perform.
Finally, using our numerical results, we compare the static and dynamic modeling approaches to study the robustness of our results. Our numerical results show that engineering insights on the resource allocation schemes drawn out the static study are valid in a dynamic context, and vice versa. However, the engineering insights on user association rules drawn out of the static study are not always consistent with the insights drawn out of the dynamic study.
Subjects/Keywords: Heterogeneous Cellular Networks
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APA (6th Edition):
Fooladivanda, D. (2014). Comparison between Static and Dynamic Modeling Approaches for Heterogeneous Cellular Networks. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/8626
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Fooladivanda, Dariush. “Comparison between Static and Dynamic Modeling Approaches for Heterogeneous Cellular Networks.” 2014. Thesis, University of Waterloo. Accessed January 26, 2021.
http://hdl.handle.net/10012/8626.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fooladivanda, Dariush. “Comparison between Static and Dynamic Modeling Approaches for Heterogeneous Cellular Networks.” 2014. Web. 26 Jan 2021.
Vancouver:
Fooladivanda D. Comparison between Static and Dynamic Modeling Approaches for Heterogeneous Cellular Networks. [Internet] [Thesis]. University of Waterloo; 2014. [cited 2021 Jan 26].
Available from: http://hdl.handle.net/10012/8626.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fooladivanda D. Comparison between Static and Dynamic Modeling Approaches for Heterogeneous Cellular Networks. [Thesis]. University of Waterloo; 2014. Available from: http://hdl.handle.net/10012/8626
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Queens University
2.
Qutqut, Mahmoud.
Mobile Small cells in Cellular Heterogeneous Networks
.
Degree: Computing, 2014, Queens University
URL: http://hdl.handle.net/1974/12538
► The unprecedented soaring demand for capacity and coverage on cellular networks is challenging and straining operators. The current improvements in cellular standards are significantly behind…
(more)
▼ The unprecedented soaring demand for capacity and coverage on cellular networks is challenging and straining operators. The current improvements in cellular standards
are significantly behind the exponential growth in requirements. Cellular operators
are currently shifting towards Heterogeneous Networks (HetNets) as the most promis-
ing solution to meet user demands; by using a mix of Macro Base Stations (MBSs)
and Small Base Stations (SBSs).
Recently, several cellular operators have started outdoor deployments of small
cells to enhance service in high-dense areas (e.g., downtown areas). In this the-
sis we assess and propose HetNet solutions that capitalize on SBS deployments to
boost capacity and coverage under varying scenarios. Initially we investigate the core
challenge of SBS placement in high-demand outdoor zones. We propose dynamic
placement strategies (DPS) for SBSs, and present two models that optimize placement while minimizing service delivery cost when feasibility is the core challenge, and
minimizing macrocells utilization as their deployment, compared to small cells, pose
a constant challenges. Both problems are formulated as Mixed Integer Linear Pro-
grams (MILPs). These solutions are contrasted to two greedy schemes which we have
presented and evaluated over extensive simulations. Our simulation results demonstrate that our proposed DPS achieve significant reductions of service delivery cost and MBSs utilization.
Realizing that a significant cant amount of cellular demand is generated on the go and
suffers deteriorating quality, recent research efforts proposed deploying SBSs onboard
public transit vehicles to enhance cellular coverage. We investigate the potential
performance gains of using mobile SBSs (mobSBSs). We assess and quantify the impact of utilizing mobSBSs which are deployed in vehicles to aggregate traffic and backhaul it to MBS. In our evaluation we study two important indicators to assess the Quality of Service (QoS) received by mobile users, and the ensuing network
performance. Namely, we investigate Pairwise Error Probability (PEP) and Outage
Probability (OP) for mobile users.
Finally, we propose a novel mobile data offloading framework which capitalizes
on mobile small cells and urban Wireless Fidelity (WiFi) zones to alleviate the data
tra c load generated onboard on MBSs. We incorporate dedicated and adaptive offloading mechanisms that take into account mobile user service profiles (history)
and WiFi coverage maps to improve the e efficiency of the offloading framework. We conduct extensive simulation experiments to evaluate the performance of the mobile
offloading framework and contrast results to a benchmark.
Subjects/Keywords: Heterogeneous Networks
;
Small Cells
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APA (6th Edition):
Qutqut, M. (2014). Mobile Small cells in Cellular Heterogeneous Networks
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/12538
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Qutqut, Mahmoud. “Mobile Small cells in Cellular Heterogeneous Networks
.” 2014. Thesis, Queens University. Accessed January 26, 2021.
http://hdl.handle.net/1974/12538.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Qutqut, Mahmoud. “Mobile Small cells in Cellular Heterogeneous Networks
.” 2014. Web. 26 Jan 2021.
Vancouver:
Qutqut M. Mobile Small cells in Cellular Heterogeneous Networks
. [Internet] [Thesis]. Queens University; 2014. [cited 2021 Jan 26].
Available from: http://hdl.handle.net/1974/12538.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Qutqut M. Mobile Small cells in Cellular Heterogeneous Networks
. [Thesis]. Queens University; 2014. Available from: http://hdl.handle.net/1974/12538
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Luleå University of Technology
3.
Ardah, Khaled.
Indoor Models of Heterogeneous Networks.
Degree: 2012, Luleå University of Technology
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-51751
► Technology evolution over the last few years added many demands on mobile networks. To be able to support and handle the new technologies requirement…
(more)
▼ Technology evolution over the last few years added many demands on mobile networks. To be able to support and handle the new technologies requirement and keep the customers satisfied, network operators need to increase the capacity, coverage, and performance of their networks. Low power nodes considered a promising method to satisfy future demands. This thesis work describes implementation of the 3GPP indoor pico models (TR36.814) for LTE heterogeneous networks and investigations by means of simulation for different scenarios to better understand the impacts of deployment position, interference, and load balance on system performance. The simulator is MATLAB based provided from Ericsson Research AP. It has found that, pico nodes coverage area is limited to indoor. In most of the cases, the transition zone area (i.e. where the optimal cell selections differ between downlink and uplink) is covered by the building wall. The users in the transition zone area indoors have acceptable performance, comparing with the ones outdoor, since degrade in their SINR level is less. In addition, low power nodes are able to handle larger load traffic share than macro nodes since they are more protected thus they have better channel conditions than macro nodes.
Validerat; 20121019 (anonymous)
Subjects/Keywords: Technology; Heterogeneous Networks; LTE; Teknik
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APA (6th Edition):
Ardah, K. (2012). Indoor Models of Heterogeneous Networks. (Thesis). Luleå University of Technology. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-51751
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ardah, Khaled. “Indoor Models of Heterogeneous Networks.” 2012. Thesis, Luleå University of Technology. Accessed January 26, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-51751.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ardah, Khaled. “Indoor Models of Heterogeneous Networks.” 2012. Web. 26 Jan 2021.
Vancouver:
Ardah K. Indoor Models of Heterogeneous Networks. [Internet] [Thesis]. Luleå University of Technology; 2012. [cited 2021 Jan 26].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-51751.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ardah K. Indoor Models of Heterogeneous Networks. [Thesis]. Luleå University of Technology; 2012. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-51751
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Luleå University of Technology
4.
Abdulhussein, Muthanna.
QoS of Mobile Broadband Users in Heterogeneous Networks.
Degree: 2012, Luleå University of Technology
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59357
► Initial deployments of LTE networks are based on so called homogeneous networks consisting of only Macro base stations for basic coverage. As the number…
(more)
▼ Initial deployments of LTE networks are based on so called homogeneous networks consisting of only Macro base stations for basic coverage. As the number of users increases, especially in densely populated areas, the macro base stations are believed to lack sufficient capacity to bear the load of traffic increase for mobile broadband users. To overcome this problem the macro network will be complemented with low power nodes, such as Pico and Femto eNBs, will improve the system capacity.This Master thesis study comprises an investigation on how quality of service can be maintained for video telephony users in heterogeneous networks when considering different configurations, user patterns, user distributions, and user loads.Three heterogeneous configurations specified by 3GPP were compared to a reference case; a pure macro network. Firstly, the simulation results show that when introducing low power nodes (LPN), the video telephony capacity increases with the increase in the number of users clustered around the hot-spots for all configurations. Also, in the heterogeneous network users in the macro cells experience slightly lower interference when more users are absorbed by the low power nodes. The video telephony tail latency experiences a sharp increase for all configurations. The reason for this is that the worst cells become congested and the users will compete for the available resources. It is observed that the tail latency in uplink, already at low load, is higher than in downlink due to that the scheduler is located at eNodeB.Secondly, a scenario investigating the gain of Low power nodes range extension showed that signal to interference and noise ratio (SINR) problems arise if the range of the low power nodes is extended, however the system as a whole observes increased throughput. The main reasons are macro layer offloading and reduced interference created by the macro layer. Finally, a scenario investigating the addition of multiple Low power nodes cells with range extension showed that video telephony capacity will be further improved when multiple Low power nodes are combined with range-extension.The combination of range extension and multiple low power nodes (LPN) will reduce the interference originating from the macro cells as a result of the offloading of the macro cells. This since more users will be served by the LPN cells. As a result, the macro physical resource block utilization will be reduced. It was shown also that the throughput of the LPN cells is not related to the number of deployed LPNs, but it depends on the size of the LPN cell increase of RSRP offset.
Validerat; 20120118 (anonymous)
Subjects/Keywords: Technology; Heterogeneous Networks; Teknik
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APA (6th Edition):
Abdulhussein, M. (2012). QoS of Mobile Broadband Users in Heterogeneous Networks. (Thesis). Luleå University of Technology. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59357
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Abdulhussein, Muthanna. “QoS of Mobile Broadband Users in Heterogeneous Networks.” 2012. Thesis, Luleå University of Technology. Accessed January 26, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59357.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Abdulhussein, Muthanna. “QoS of Mobile Broadband Users in Heterogeneous Networks.” 2012. Web. 26 Jan 2021.
Vancouver:
Abdulhussein M. QoS of Mobile Broadband Users in Heterogeneous Networks. [Internet] [Thesis]. Luleå University of Technology; 2012. [cited 2021 Jan 26].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59357.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Abdulhussein M. QoS of Mobile Broadband Users in Heterogeneous Networks. [Thesis]. Luleå University of Technology; 2012. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-59357
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Cape Town
5.
Edia, Adada.
Comparison of vertical handover decision-based techniques in heterogeneous networks.
Degree: Image, Electrical Engineering, 2017, University of Cape Town
URL: http://hdl.handle.net/11427/26878
► Industry leaders are currently setting out standards for 5G Networks projected for 2020 or even sooner. Future generation networks will be heterogeneous in nature because…
(more)
▼ Industry leaders are currently setting out standards for 5G
Networks projected for 2020 or even sooner. Future generation
networks will be
heterogeneous in nature because no single network type is capable of optimally meeting all the rapid changes in customer demands.
Heterogeneous networks are typically characterized by some network architecture, base stations of varying transmission power, transmission solutions and the deployment of a mix of technologies (multiple radio access technologies). In
heterogeneous networks, the processes involved when a mobile node successfully switches from one radio access technology to the other for the purpose of quality of service continuity is termed vertical handover or vertical handoff. Active calls that get dropped, or cases where there is discontinuity of service experienced by mobile users can be attributed to the phenomenon of delayed handover or an outright case of an unsuccessful handover procedure. This dissertation analyses the performance of a fuzzy-based VHO algorithm scheme in a Wi-Fi, WiMAX, UMTS and LTE integrated network using the OMNeT++ discrete event simulator. The loose coupling type network architecture is adopted and results of the simulation are analysed and compared for the two major categories of handover basis; multiple and single criteria based handover methods. The key performance indices from the simulations showed better overall throughput, better call dropped rate and shorter handover time duration for the multiple criteria based decision method compared to the single criteria based technique. This work also touches on current trends, challenges in area of seamless handover and initiatives for future
Networks (Next Generation
Heterogeneous Networks).
Advisors/Committee Members: Falowo, Olabisi E (advisor).
Subjects/Keywords: Electrical Engineering; Heterogeneous Networks
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APA (6th Edition):
Edia, A. (2017). Comparison of vertical handover decision-based techniques in heterogeneous networks. (Thesis). University of Cape Town. Retrieved from http://hdl.handle.net/11427/26878
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Edia, Adada. “Comparison of vertical handover decision-based techniques in heterogeneous networks.” 2017. Thesis, University of Cape Town. Accessed January 26, 2021.
http://hdl.handle.net/11427/26878.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Edia, Adada. “Comparison of vertical handover decision-based techniques in heterogeneous networks.” 2017. Web. 26 Jan 2021.
Vancouver:
Edia A. Comparison of vertical handover decision-based techniques in heterogeneous networks. [Internet] [Thesis]. University of Cape Town; 2017. [cited 2021 Jan 26].
Available from: http://hdl.handle.net/11427/26878.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Edia A. Comparison of vertical handover decision-based techniques in heterogeneous networks. [Thesis]. University of Cape Town; 2017. Available from: http://hdl.handle.net/11427/26878
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
6.
Patino Gonzalez Miguel Angel.
Evaluation of Mobile Data Offloading with Multipath TCP in Heterogeneous Wireless Networks : ヘテロジニアス無線ネットワークにおけるマルチパスTCPを用いた移動データオフローディングの評価; ヘテロジニアス ムセン ネットワーク ニ オケル マルチパス TCP オ モチイタ イドウ データ オフローディング ノ ヒョウカ.
Degree: Nara Institute of Science and Technology / 奈良先端科学技術大学院大学
URL: http://hdl.handle.net/10061/8773
Subjects/Keywords: Heterogeneous Wireless Networks
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APA (6th Edition):
Angel, P. G. M. (n.d.). Evaluation of Mobile Data Offloading with Multipath TCP in Heterogeneous Wireless Networks : ヘテロジニアス無線ネットワークにおけるマルチパスTCPを用いた移動データオフローディングの評価; ヘテロジニアス ムセン ネットワーク ニ オケル マルチパス TCP オ モチイタ イドウ データ オフローディング ノ ヒョウカ. (Thesis). Nara Institute of Science and Technology / 奈良先端科学技術大学院大学. Retrieved from http://hdl.handle.net/10061/8773
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Angel, Patino Gonzalez Miguel. “Evaluation of Mobile Data Offloading with Multipath TCP in Heterogeneous Wireless Networks : ヘテロジニアス無線ネットワークにおけるマルチパスTCPを用いた移動データオフローディングの評価; ヘテロジニアス ムセン ネットワーク ニ オケル マルチパス TCP オ モチイタ イドウ データ オフローディング ノ ヒョウカ.” Thesis, Nara Institute of Science and Technology / 奈良先端科学技術大学院大学. Accessed January 26, 2021.
http://hdl.handle.net/10061/8773.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Angel, Patino Gonzalez Miguel. “Evaluation of Mobile Data Offloading with Multipath TCP in Heterogeneous Wireless Networks : ヘテロジニアス無線ネットワークにおけるマルチパスTCPを用いた移動データオフローディングの評価; ヘテロジニアス ムセン ネットワーク ニ オケル マルチパス TCP オ モチイタ イドウ データ オフローディング ノ ヒョウカ.” Web. 26 Jan 2021.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Vancouver:
Angel PGM. Evaluation of Mobile Data Offloading with Multipath TCP in Heterogeneous Wireless Networks : ヘテロジニアス無線ネットワークにおけるマルチパスTCPを用いた移動データオフローディングの評価; ヘテロジニアス ムセン ネットワーク ニ オケル マルチパス TCP オ モチイタ イドウ データ オフローディング ノ ヒョウカ. [Internet] [Thesis]. Nara Institute of Science and Technology / 奈良先端科学技術大学院大学; [cited 2021 Jan 26].
Available from: http://hdl.handle.net/10061/8773.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.
Council of Science Editors:
Angel PGM. Evaluation of Mobile Data Offloading with Multipath TCP in Heterogeneous Wireless Networks : ヘテロジニアス無線ネットワークにおけるマルチパスTCPを用いた移動データオフローディングの評価; ヘテロジニアス ムセン ネットワーク ニ オケル マルチパス TCP オ モチイタ イドウ データ オフローディング ノ ヒョウカ. [Thesis]. Nara Institute of Science and Technology / 奈良先端科学技術大学院大学; Available from: http://hdl.handle.net/10061/8773
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.
UCLA
7.
Monajemi, Pooya.
Improved Resource Allocation Mechanisms in Heterogeneous Mobile Data Networks.
Degree: Electrical Engineering, 2012, UCLA
URL: http://www.escholarship.org/uc/item/7qt3r4q8
► Femtocells, also sometimes referred to using the term "Home NodeB" (HNB), are low-power, low-cost cellular base stations utilizing a high speed internet connection as the…
(more)
▼ Femtocells, also sometimes referred to using the term "Home NodeB" (HNB), are low-power, low-cost cellular base stations utilizing a high speed internet connection as the backhaul. The recent hike in interest for femtocells in the market calls for a study of their impact on quality of service and possible mechanisms in resource allocation devised to address the problems that arise from their deployment. The work presented concentrates on three aspects of the resource allocation problem. Firstly, the access policies in heterogeneous networks consisting of macro and femto base stations are considered with the aim to ensure acceptable quality of service provided to all users while improving for some including the owners of the device. Access policies are studied that lie between the two extremes of fully open access and fully closed to exclusive owners of the device.The second aspect under study is packet scheduling mechanisms. While works exist on intra-cellular scheduling mechanisms as well as centralized inter-cellular schemes that provide a globally near- optimal scheduling, the body of work on global and uncoordinated scheduling mechanism is small, which is explored in this work.The third part of the study focuses on hand-off minimization over a network of moving mobile stations. We aim to find optimal handoff sequences in a series of predicted possible paths in front of a moving mobile station. A graph-based algorithm is explored in the third part of the study.
Subjects/Keywords: Electrical engineering; Femtocells; Heterogeneous Networks; Resource Allocation
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APA (6th Edition):
Monajemi, P. (2012). Improved Resource Allocation Mechanisms in Heterogeneous Mobile Data Networks. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/7qt3r4q8
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Monajemi, Pooya. “Improved Resource Allocation Mechanisms in Heterogeneous Mobile Data Networks.” 2012. Thesis, UCLA. Accessed January 26, 2021.
http://www.escholarship.org/uc/item/7qt3r4q8.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Monajemi, Pooya. “Improved Resource Allocation Mechanisms in Heterogeneous Mobile Data Networks.” 2012. Web. 26 Jan 2021.
Vancouver:
Monajemi P. Improved Resource Allocation Mechanisms in Heterogeneous Mobile Data Networks. [Internet] [Thesis]. UCLA; 2012. [cited 2021 Jan 26].
Available from: http://www.escholarship.org/uc/item/7qt3r4q8.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Monajemi P. Improved Resource Allocation Mechanisms in Heterogeneous Mobile Data Networks. [Thesis]. UCLA; 2012. Available from: http://www.escholarship.org/uc/item/7qt3r4q8
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Alberta
8.
Mortazavi ,Seyed Hossein.
Designing Hierarchical WSNs for Heterogeneous Outdoor
Environments.
Degree: MS, Department of Computing Science, 2012, University of Alberta
URL: https://era.library.ualberta.ca/files/xk81jm08r
► In this project we study the problem of wireless sensor network (WSN) node placement in a modelled environment. Although various optimal and sub-optimal techniques with…
(more)
▼ In this project we study the problem of wireless
sensor network (WSN) node placement in a modelled environment.
Although various optimal and sub-optimal techniques with different
objectives and constraints such as maximizing coverage, network
lifetime and reliable data transfer have previously been proposed
for different variations of the node placement problem, many of
these methods make various simplifying assumptions such as
homogeneous transmission ranges among nodes. In our work we model
the real environment and then based on our model we specifically
design two node placement algorithms for two-tiered heterogeneous
networks that aim to solve problems such as minimizing the number
of RNs and SNs needed to satisfy a coverage constraint while
maintaining connectivity (with fault-less connections) of the SNs
to the base station and also maximizing the area covered by a
specific number of RNs and SNs.
Subjects/Keywords: Heterogeneous environments; Wireless Sensor Networks; Node placement
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to Zotero / EndNote / Reference
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APA (6th Edition):
Hossein, M. ,. (2012). Designing Hierarchical WSNs for Heterogeneous Outdoor
Environments. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/xk81jm08r
Chicago Manual of Style (16th Edition):
Hossein, Mortazavi ,Seyed. “Designing Hierarchical WSNs for Heterogeneous Outdoor
Environments.” 2012. Masters Thesis, University of Alberta. Accessed January 26, 2021.
https://era.library.ualberta.ca/files/xk81jm08r.
MLA Handbook (7th Edition):
Hossein, Mortazavi ,Seyed. “Designing Hierarchical WSNs for Heterogeneous Outdoor
Environments.” 2012. Web. 26 Jan 2021.
Vancouver:
Hossein M,. Designing Hierarchical WSNs for Heterogeneous Outdoor
Environments. [Internet] [Masters thesis]. University of Alberta; 2012. [cited 2021 Jan 26].
Available from: https://era.library.ualberta.ca/files/xk81jm08r.
Council of Science Editors:
Hossein M,. Designing Hierarchical WSNs for Heterogeneous Outdoor
Environments. [Masters Thesis]. University of Alberta; 2012. Available from: https://era.library.ualberta.ca/files/xk81jm08r
University of Toronto
9.
Shen, Kaiming.
Algorithms for Base Station Assignment in Heterogeneous Cellular Networks.
Degree: 2013, University of Toronto
URL: http://hdl.handle.net/1807/69990
► This thesis aims to find out the base station (BS) assignment strategy which achieves load balancing in heterogeneous networks from the proportional fairness perspective. There…
(more)
▼ This thesis aims to find out the base station (BS) assignment strategy which achieves load balancing in heterogeneous networks from the proportional fairness perspective. There are mainly three contributions in this thesis. First, for the BS assignment problem under fixed transmit power, a dual pricing approach called the dual coordinate descent is proposed, which achieves near-optimal solution and is suitable for distributed implementation. Further, this method is modified to apply to the orthogonal frequency-division multiplexing (OFDM) case. Second, for the joint BS assignment and power control problem, this thesis offers the outside incorporation method. This method is shown to be more practical than another novel approach in this thesis. Third, for the joint BS assignment and beamforming problem, this thesis proposes a two-stage method. This approach has comparable performance and low computational complexity as compared to the algorithm in the existing literature.
MAST
Advisors/Committee Members: Yu, Wei, Electrical and Computer Engineering.
Subjects/Keywords: base station assignment; heterogeneous networks; 0544; 0984
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APA (6th Edition):
Shen, K. (2013). Algorithms for Base Station Assignment in Heterogeneous Cellular Networks. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/69990
Chicago Manual of Style (16th Edition):
Shen, Kaiming. “Algorithms for Base Station Assignment in Heterogeneous Cellular Networks.” 2013. Masters Thesis, University of Toronto. Accessed January 26, 2021.
http://hdl.handle.net/1807/69990.
MLA Handbook (7th Edition):
Shen, Kaiming. “Algorithms for Base Station Assignment in Heterogeneous Cellular Networks.” 2013. Web. 26 Jan 2021.
Vancouver:
Shen K. Algorithms for Base Station Assignment in Heterogeneous Cellular Networks. [Internet] [Masters thesis]. University of Toronto; 2013. [cited 2021 Jan 26].
Available from: http://hdl.handle.net/1807/69990.
Council of Science Editors:
Shen K. Algorithms for Base Station Assignment in Heterogeneous Cellular Networks. [Masters Thesis]. University of Toronto; 2013. Available from: http://hdl.handle.net/1807/69990
Queen Mary, University of London
10.
Liu, Dantong.
User association optimisation in HetNets : algorithms and performance.
Degree: PhD, 2015, Queen Mary, University of London
URL: http://qmro.qmul.ac.uk/xmlui/handle/123456789/12850
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.775156
► The fifth generation (5G) mobile networks expect significantly higher transmission rate and energy efficiency than existing networks. Heterogeneous networks (HetNets), where various low power base…
(more)
▼ The fifth generation (5G) mobile networks expect significantly higher transmission rate and energy efficiency than existing networks. Heterogeneous networks (HetNets), where various low power base stations (BSs) are underlaid in a macro-cellular network, are likely to become the dominate theme during the wireless evolution towards 5G. However the complex HetNets scenario poses substantial challenges to the user association design. This thesis focuses on the user association optimisation for different HetNets scenarios. First, user association policy is designed for conventional grid-powered HetNets via game theory. An optimal user association algorithm is proposed to improve the downlink (DL) system performance. In order to address the uplink-downlink (UL-DL) asymmetry issue in HetNets, a joint UL and DL user association algorithm is further developed to enhance both UL and DL energy efficiencies. In addition, an opportunistic user association algorithm in multi-service HetNets is proposed for quality of service (QoS) provision of delay constraint traffic while providing fair resource allocation for best effort traffic. Second, driven by increasing environmental concerns, user association policy is designed for green HetNets with renewable energy powered BSs. In such a scenario, the proposed adaptive user association algorithm is able to adapt the user association decision to the amount of renewable energy harvested by BSs. Third, HetNets with hybrid energy sources are investigated, as BSs powered by both power grid and renewable energy sources have the superiority in supporting uninterrupted service as well as achieving green communications. In this context, an optimal user association algorithm is developed to achieve the tradeoffs between average traffic delay and on-grid energy consumption. Additionally, a two-dimensional optimisation on user association and green energy allocation is proposed to minimise both total and peak on-grid energy consumptions, as well as enhance the QoS provision. Thorough theoretical analysis is conducted in the development of all proposed algorithms, and performance of proposed algorithms is evaluated via comprehensive simulations.
Subjects/Keywords: Electronic Engineering and Computer Science; Heterogeneous networks
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APA ·
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MLA ·
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CSE |
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APA (6th Edition):
Liu, D. (2015). User association optimisation in HetNets : algorithms and performance. (Doctoral Dissertation). Queen Mary, University of London. Retrieved from http://qmro.qmul.ac.uk/xmlui/handle/123456789/12850 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.775156
Chicago Manual of Style (16th Edition):
Liu, Dantong. “User association optimisation in HetNets : algorithms and performance.” 2015. Doctoral Dissertation, Queen Mary, University of London. Accessed January 26, 2021.
http://qmro.qmul.ac.uk/xmlui/handle/123456789/12850 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.775156.
MLA Handbook (7th Edition):
Liu, Dantong. “User association optimisation in HetNets : algorithms and performance.” 2015. Web. 26 Jan 2021.
Vancouver:
Liu D. User association optimisation in HetNets : algorithms and performance. [Internet] [Doctoral dissertation]. Queen Mary, University of London; 2015. [cited 2021 Jan 26].
Available from: http://qmro.qmul.ac.uk/xmlui/handle/123456789/12850 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.775156.
Council of Science Editors:
Liu D. User association optimisation in HetNets : algorithms and performance. [Doctoral Dissertation]. Queen Mary, University of London; 2015. Available from: http://qmro.qmul.ac.uk/xmlui/handle/123456789/12850 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.775156
University of Illinois – Urbana-Champaign
11.
Blatti, Charles.
Understanding co-expressed gene sets by identifying regulators and modeling genomic elements.
Degree: PhD, Computer Science, 2015, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/78301
► Genomic researchers commonly study complex phenotypes by identifying experimentally derived sets of functionally related genes with similar transcriptional profiles. These gene sets are then frequently…
(more)
▼ Genomic researchers commonly study complex phenotypes by identifying experimentally derived sets of functionally related genes with similar transcriptional profiles. These gene sets are then frequently subjected to statistical tests of association relating them to previously characterized gene sets from literature and public databases. However, few tools exist examining the non-coding, regulatory sequence of gene sets for evidence of a shared regulatory signature that may signal the involvement of important DNA-binding proteins called transcription factors (TFs). Here, we proposed and developed new computational methods for identifying major regulatory features of co-expressed gene sets that incorporate TF-DNA binding specificities (“motifs”) with other important features such as sequence conservation and chromatin structure. We additionally demonstrated a novel approach for discovering regulatory signatures that are shared across gene sets from multiple experimental conditions or tissues. Given the co-expressed genes of a particular cell type, we also attempted to annotate their specific regulatory sequences (“enhancers”) by constructing models of enhancer activity that incorporate the expression and binding specificities of the relevant transcription factors. We first developed and tested these models in well-characterized cell types, and then evaluated the extent to which these models were applicable using only minimal experimental evidence to poorly characterized systems without known transcriptional regulators and functional enhancers. Finally, we developed a network-based algorithm for examining novel gene sets that integrates many diverse types of biological evidences and relationships to better discover functionally related genes. This novel approach processed a comprehensive,
heterogeneous network of biological knowledge and ranked genes and molecular properties represented in the network for their relevance to the given set of co-expressed genes.
Advisors/Committee Members: Sinha, Saurabh (advisor), Sinha, Saurabh (Committee Chair), Ma, Jian (committee member), Robinson, Gene E. (committee member), Wolfe, Scot (committee member), Zhai, ChengXiang (committee member).
Subjects/Keywords: heterogeneous networks; gene set analysis; transcriptional regulation
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APA ·
Chicago ·
MLA ·
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CSE |
Export
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Manager
APA (6th Edition):
Blatti, C. (2015). Understanding co-expressed gene sets by identifying regulators and modeling genomic elements. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/78301
Chicago Manual of Style (16th Edition):
Blatti, Charles. “Understanding co-expressed gene sets by identifying regulators and modeling genomic elements.” 2015. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed January 26, 2021.
http://hdl.handle.net/2142/78301.
MLA Handbook (7th Edition):
Blatti, Charles. “Understanding co-expressed gene sets by identifying regulators and modeling genomic elements.” 2015. Web. 26 Jan 2021.
Vancouver:
Blatti C. Understanding co-expressed gene sets by identifying regulators and modeling genomic elements. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2015. [cited 2021 Jan 26].
Available from: http://hdl.handle.net/2142/78301.
Council of Science Editors:
Blatti C. Understanding co-expressed gene sets by identifying regulators and modeling genomic elements. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2015. Available from: http://hdl.handle.net/2142/78301
University of Illinois – Urbana-Champaign
12.
Cai, Haoyan.
Publication venue recommendation in heterogeneous information networks.
Degree: MS, Computer Science, 2016, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/90825
► When a new paper is completed, choosing a good conference or journal in which to publish this new paper is of critical importance to all…
(more)
▼ When a new paper is completed, choosing a good conference or journal in which to publish this new paper is of critical importance to all researchers. Authors often make their decision based on the topics suitability between the paper content and target venues, the likelihood of getting accepted into the venues, the publication history of the authors and other reasonable considerations. A good number of works do content-based analysis to match the topics of the paper and target venues. Such approaches often use full texts, abstracts along with other meta data. The main challenge, for this line of works, is to resolve topic ambiguity because many venues share similar topics and topics evolve over time. Another line of works are network-based approaches, which make recommendations using co-author
networks and author-venue links in the bibliographic information
networks. However, we have not yet seen a general framework that incorporates a broad range of both content-based features and network-based features, which are potentially capable of delivering more information to help solve the problem.
In this thesis, we propose a general framework to automatically find appropriate venues for a new paper using a
heterogeneous information network approach. First, meta path-based topological features are systematically extracted from the underlying bibliographic network. Then, a supervised model is used to learn the weights associated with different topological features in deciding the most suitable venues. Experiments on Microsoft Academic Graph(MAG) datasets show that our new approach consistently outperforms existing works by venue prediction accuracy. Results also show that not only topics information but authors'
networks and publication history are important factors in the the problem of which venue to submit a new paper, we further tell from our experiments results that different authors have different influence over the final choice of venues.
Advisors/Committee Members: Han, Jiawei (advisor).
Subjects/Keywords: venue recommendation; heterogeneous information networks; meta paths
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APA ·
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MLA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cai, H. (2016). Publication venue recommendation in heterogeneous information networks. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/90825
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Cai, Haoyan. “Publication venue recommendation in heterogeneous information networks.” 2016. Thesis, University of Illinois – Urbana-Champaign. Accessed January 26, 2021.
http://hdl.handle.net/2142/90825.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Cai, Haoyan. “Publication venue recommendation in heterogeneous information networks.” 2016. Web. 26 Jan 2021.
Vancouver:
Cai H. Publication venue recommendation in heterogeneous information networks. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2016. [cited 2021 Jan 26].
Available from: http://hdl.handle.net/2142/90825.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Cai H. Publication venue recommendation in heterogeneous information networks. [Thesis]. University of Illinois – Urbana-Champaign; 2016. Available from: http://hdl.handle.net/2142/90825
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Illinois – Urbana-Champaign
13.
Norick, Brandon.
Leveraging heterogeneous information networks for personalized entity recommendation.
Degree: MS, Computer Science, 2017, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/99227
► Recommendation is a challenging but important task which has applications in nearly every sector of industry as well as in academia. There are a wide…
(more)
▼ Recommendation is a challenging but important task which has applications in nearly every sector of industry as well as in academia. There are a wide variety of approaches to the recommendation problem, with network-based techniques garnering increasing interest and study in recent years. However, most of these studies only explore the problem in the context of a single relationship between entities, such as a following relationship in a social network like Twitter. Such approaches ignore the complex environment in which most recommendation tasks exist in favor of simplifying the problem. The complexity of human decision making necessitates approaches which can utilize the
heterogeneous environments in which the recommendation task is set rather than reducing them to single relationship.
In this work, we explore the problem of entity recommendation without such a simplification, instead we utilize
heterogeneous information
networks to capture the complexity of the behaviors for which we are seeking to make recommendations. Our proposed approach captures the different behaviors of individuals by examining their
heterogeneous relationships in the network and as a result can provide high-quality personalized recommendations from implicit feedback represented in
heterogeneous information
networks.
We begin by introducing meta-path-based latent features, which capture the connectivity of entities in the network along different paths, giving us a foundation which explicitly accounts for the
heterogeneous nature of the task. Upon this foundation we build a global recommendation model using a ranking optimization technique known as Bayesian Personalized Ranking. We extend this global model into a personalized model, building a model which can capture the differences present in the network that describe the preferences of different users. Finally, empirical studies show that our techniques are more effective than several popular and state-of-the-art entity recommendations techniques.
Advisors/Committee Members: Han, Jiawei (advisor).
Subjects/Keywords: Recommender systems; Entity recommendation; Heterogeneous information networks
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APA ·
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MLA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Norick, B. (2017). Leveraging heterogeneous information networks for personalized entity recommendation. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/99227
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Norick, Brandon. “Leveraging heterogeneous information networks for personalized entity recommendation.” 2017. Thesis, University of Illinois – Urbana-Champaign. Accessed January 26, 2021.
http://hdl.handle.net/2142/99227.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Norick, Brandon. “Leveraging heterogeneous information networks for personalized entity recommendation.” 2017. Web. 26 Jan 2021.
Vancouver:
Norick B. Leveraging heterogeneous information networks for personalized entity recommendation. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2017. [cited 2021 Jan 26].
Available from: http://hdl.handle.net/2142/99227.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Norick B. Leveraging heterogeneous information networks for personalized entity recommendation. [Thesis]. University of Illinois – Urbana-Champaign; 2017. Available from: http://hdl.handle.net/2142/99227
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
De Montfort University
14.
Alquhayz, Hani.
Security management system for 4G heterogeneous networks.
Degree: PhD, 2015, De Montfort University
URL: http://hdl.handle.net/2086/11124
► There is constant demand for the development of mobile networks to meet the service requirements of users, and their development is a significant topic of…
(more)
▼ There is constant demand for the development of mobile networks to meet the service requirements of users, and their development is a significant topic of research. The current fourth generation (4G) of mobile networks are expected to provide high speed connections anywhere at any time. Various existing 4G architectures such as LTE and WiMax support only wireless technologies, while an alternative architecture, Y-Comm, has been proposed to combine both existing wired and wireless networks. Y-Comm seeks to meet the main service requirements of 4G by converging the existing networks, so that the user can get better service anywhere and at any time. One of the major characteristics of Y-Comm is heterogeneity, which means that networks with different topologies work together to provide seamless communication to the end user. However, this heterogeneity leads to technical issues which may compromise quality of service, vertical handover and security. Due to the convergence characteristic of Y-Comm, security is considered more significant than in the existing LTE and WiMax networks. These security concerns have motivated this research study to propose a novel security management system. The research aims to meet the security requirements of 4G mobile networks, e.g. preventing end user devices from being used as attack tools. This requirement has not been met clearly in previous studies of Y-Comm, but this study proposes a security management system which does this. This research follows the ITU-T recommendation M.3400 dealing with security violations within Y-Comm networks. It proposes a policy-based security management system to deal with events that trigger actions in the system and uses Ponder2 to implement it. The proposed system, located in the top layer of the Y-Comm architecture, interacts with components of Y-Comm to enforce the appropriate policies. Its four main components are the Intelligent Agent, the Security Engine, the Security Policies Database and the Security Administrator. These are represented in this research as managed objects to meet design considerations such as extensibility and modifiability. This research demonstrates that the proposed system meets the security requirements of the Y-Comm environment. Its deployment is possible with managed objects built with Ponder2 for all of the components of Y-Comm, which means that the security management system is able to prevent end user devices from being used as attack tools. It can also achieve other security goals of Y-Comm networks.
Subjects/Keywords: 005.1; 4G; Heterogeneous networks; security management
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APA ·
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MLA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Alquhayz, H. (2015). Security management system for 4G heterogeneous networks. (Doctoral Dissertation). De Montfort University. Retrieved from http://hdl.handle.net/2086/11124
Chicago Manual of Style (16th Edition):
Alquhayz, Hani. “Security management system for 4G heterogeneous networks.” 2015. Doctoral Dissertation, De Montfort University. Accessed January 26, 2021.
http://hdl.handle.net/2086/11124.
MLA Handbook (7th Edition):
Alquhayz, Hani. “Security management system for 4G heterogeneous networks.” 2015. Web. 26 Jan 2021.
Vancouver:
Alquhayz H. Security management system for 4G heterogeneous networks. [Internet] [Doctoral dissertation]. De Montfort University; 2015. [cited 2021 Jan 26].
Available from: http://hdl.handle.net/2086/11124.
Council of Science Editors:
Alquhayz H. Security management system for 4G heterogeneous networks. [Doctoral Dissertation]. De Montfort University; 2015. Available from: http://hdl.handle.net/2086/11124
Tokyo Institute of Technology / 東京工業大学
15.
E..Rezagah, Roya.
Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation : Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation; 大規模基地局連携を用いた動的カバレッジ制御を実現する高度なセルラネットワークアーキテクチャに関する研究.
Degree: 博士（工学）, 2014, Tokyo Institute of Technology / 東京工業大学
URL: http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100675130
► This research focuses on a heterogeneous wireless cellular network consisting of small cells within macro cells. The thesis aims to provide a development direction to…
(more)
▼ This research focuses on a heterogeneous wireless cellular network consisting of small cells within macro cells. The thesis aims to provide a development direction to utilize the network resources to the utmost extent. It is started with random non coordinated networks. The main limiting factor in a non-coordinated network is the interference. Then step by step, more advanced schemes are added to the network to reduce or eliminate the interference and improve network's performance. At first, full coordination is added to the network. It is shown that although such a coordination improves the system rate in some scenarios, it cannot fit to the dynamics of the traffic demand in a cellular network. Therefore, a more advanced scheme is introduced. In this scheme dynamic coverage control of BSs alongside large scale clusters direct idle network resources from sparse areas to the congestion areas. This method is especially beneficial when there are some distinct congestion zones in the network. This scheme can achieve several times higher capacity than the previous schemes. In addition, by introducing rank adaptation in the large scale clusters the system rate can be increased even more. Then gain in the system rate can be more than 100 percent depending on the scenario and environment. This huge gain is a motivation for further study on the aspects and issues of the practical implementation. The last part of the thesis discusses the required measurement and signaling scheme for the practical implementation based on the concept of C/U splitting and signaling schemes that are currently considered in 3GPP standardization. This can insure the feasibility of the scheme.
Subjects/Keywords: Cellular networks; heterogeneous networks (HetNet); coordinated multipoint (CoMP); dynamic cell structuring
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APA ·
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Export
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Manager
APA (6th Edition):
E..Rezagah, R. (2014). Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation : Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation; 大規模基地局連携を用いた動的カバレッジ制御を実現する高度なセルラネットワークアーキテクチャに関する研究. (Thesis). Tokyo Institute of Technology / 東京工業大学. Retrieved from http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100675130
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
E..Rezagah, Roya. “Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation : Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation; 大規模基地局連携を用いた動的カバレッジ制御を実現する高度なセルラネットワークアーキテクチャに関する研究.” 2014. Thesis, Tokyo Institute of Technology / 東京工業大学. Accessed January 26, 2021.
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100675130.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
E..Rezagah, Roya. “Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation : Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation; 大規模基地局連携を用いた動的カバレッジ制御を実現する高度なセルラネットワークアーキテクチャに関する研究.” 2014. Web. 26 Jan 2021.
Vancouver:
E..Rezagah R. Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation : Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation; 大規模基地局連携を用いた動的カバレッジ制御を実現する高度なセルラネットワークアーキテクチャに関する研究. [Internet] [Thesis]. Tokyo Institute of Technology / 東京工業大学; 2014. [cited 2021 Jan 26].
Available from: http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100675130.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
E..Rezagah R. Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation : Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation; 大規模基地局連携を用いた動的カバレッジ制御を実現する高度なセルラネットワークアーキテクチャに関する研究. [Thesis]. Tokyo Institute of Technology / 東京工業大学; 2014. Available from: http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100675130
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Tokyo Institute of Technology / 東京工業大学
16.
E..Rezagah, Roya.
Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation : Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation; 大規模基地局連携を用いた動的カバレッジ制御を実現する高度なセルラネットワークアーキテクチャに関する研究.
Degree: 博士（工学）, 2014, Tokyo Institute of Technology / 東京工業大学
URL: http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100675131
► This research focuses on a heterogeneous wireless cellular network consisting of small cells within macro cells. The thesis aims to provide a development direction to…
(more)
▼ This research focuses on a heterogeneous wireless cellular network consisting of small cells within macro cells. The thesis aims to provide a development direction to utilize the network resources to the utmost extent. It is started with random non coordinated networks. The main limiting factor in a non-coordinated network is the interference. Then step by step, more advanced schemes are added to the network to reduce or eliminate the interference and improve network's performance. At first, full coordination is added to the network. It is shown that although such a coordination improves the system rate in some scenarios, it cannot fit to the dynamics of the traffic demand in a cellular network. Therefore, a more advanced scheme is introduced. In this scheme dynamic coverage control of BSs alongside large scale clusters direct idle network resources from sparse areas to the congestion areas. This method is especially beneficial when there are some distinct congestion zones in the network. This scheme can achieve several times higher capacity than the previous schemes. In addition, by introducing rank adaptation in the large scale clusters the system rate can be increased even more. Then gain in the system rate can be more than 100 percent depending on the scenario and environment. This huge gain is a motivation for further study on the aspects and issues of the practical implementation. The last part of the thesis discusses the required measurement and signaling scheme for the practical implementation based on the concept of C/U splitting and signaling schemes that are currently considered in 3GPP standardization. This can insure the feasibility of the scheme.
Subjects/Keywords: Cellular networks; heterogeneous networks (HetNet); coordinated multipoint (CoMP); dynamic cell structuring
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APA (6th Edition):
E..Rezagah, R. (2014). Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation : Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation; 大規模基地局連携を用いた動的カバレッジ制御を実現する高度なセルラネットワークアーキテクチャに関する研究. (Thesis). Tokyo Institute of Technology / 東京工業大学. Retrieved from http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100675131
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
E..Rezagah, Roya. “Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation : Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation; 大規模基地局連携を用いた動的カバレッジ制御を実現する高度なセルラネットワークアーキテクチャに関する研究.” 2014. Thesis, Tokyo Institute of Technology / 東京工業大学. Accessed January 26, 2021.
http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100675131.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
E..Rezagah, Roya. “Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation : Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation; 大規模基地局連携を用いた動的カバレッジ制御を実現する高度なセルラネットワークアーキテクチャに関する研究.” 2014. Web. 26 Jan 2021.
Vancouver:
E..Rezagah R. Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation : Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation; 大規模基地局連携を用いた動的カバレッジ制御を実現する高度なセルラネットワークアーキテクチャに関する研究. [Internet] [Thesis]. Tokyo Institute of Technology / 東京工業大学; 2014. [cited 2021 Jan 26].
Available from: http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100675131.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
E..Rezagah R. Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation : Efficient architecture of cellular networks for dynamic cell structuring with large-scale base station cooperation; 大規模基地局連携を用いた動的カバレッジ制御を実現する高度なセルラネットワークアーキテクチャに関する研究. [Thesis]. Tokyo Institute of Technology / 東京工業大学; 2014. Available from: http://t2r2.star.titech.ac.jp/cgi-bin/publicationinfo.cgi?q_publication_content_number=CTT100675131
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
17.
Costa, Breno Jacinto Duarte da.
3D Routing with Context Awareness
.
Degree: 2009, Universidade Federal de Pernambuco
URL: http://repositorio.ufpe.br/handle/123456789/1771
► O surgimento de interfaces de rede sem-fio de baixo custo no mercado e o crescimento na demanda por dispositivos móveis (como Smartphones, PDAs, Internet Tablets…
(more)
▼ O surgimento de interfaces de rede sem-fio de baixo custo no mercado e o crescimento na
demanda por dispositivos móveis (como Smartphones, PDAs, Internet Tablets e Laptops)
permitiram a criação de cenários onde serviços de rede para usuários móveis possam existir
sem nenhuma infra-estrutrutura pré-configurada. No entanto, a interoperabilidade entre tais
redes, que são dinâmicas e heterogêneas, é atualmente objeto de pesquisa.
Várias pesquisas na área de redes ad hoc sem-fio tem focado em uma única tecnologia
sem-fio, baseada no padrão IEEE 802.11, onde os nós da rede são vistos de maneira plana
(2D), ou seja, como elementos homogêneos, identificados apenas por endereços IP, não
levando em consideração seus perfis de hardware e tecnologias de rede. Desta forma,
pesquisas envolvendo mais de uma tecnologia de rede encontram-se em estágios iniciais.
Novas propostas são necessárias para estes cenários, que são cada vez mais comuns,
envolvendo múltiplos dispositivos com múltiplas interfaces de rede (multi-homed).
Este trabalho propõe o protocolo de roteamento 3D, direcionado a cenários onde há
heterogeneidade de dispositivos e tecnologias de rede. O objetivo do protocolo de
roteamento proposto é prover mecanismos para a interoperabilidade de redes ad hoc
heterogêneas, considerando outra dimensão de informações, aqui denominada de terceira
dimensão (3D), que consiste em agregar mais informações, como informações de contexto,
recursos dos dispositivos e interfaces de rede, ao processo de roteamento. Para isto, o
protocolo considera os seguintes aspectos fundamentais: o processo de bootstrapping da rede
heterogênea e dos nós, a construção e disseminação de informações de ciência de contexto
entre os nós, e a atribuição de papéis específicos para determinados nós da rede.
A avaliação do protocolo é feita através de experimentos em um test-bed real,
utilizando um protótipo da implementação do protocolo, num cenário composto de
dispositivos móveis como Smartphones OpenMoko, Internet Tablets N810 da Nokia e
Laptops, possuindo tecnologias Bluetooth e 802.11, executando versões embarcadas do
sistema operacional Linux
Advisors/Committee Members: Sadok, Djamel Fawzi Hadj (advisor).
Subjects/Keywords: Seamless Autoconfiguration;
Routing;
Heterogeneous networks;
Ad Hoc Networks
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APA (6th Edition):
Costa, B. J. D. d. (2009). 3D Routing with Context Awareness
. (Thesis). Universidade Federal de Pernambuco. Retrieved from http://repositorio.ufpe.br/handle/123456789/1771
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Costa, Breno Jacinto Duarte da. “3D Routing with Context Awareness
.” 2009. Thesis, Universidade Federal de Pernambuco. Accessed January 26, 2021.
http://repositorio.ufpe.br/handle/123456789/1771.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Costa, Breno Jacinto Duarte da. “3D Routing with Context Awareness
.” 2009. Web. 26 Jan 2021.
Vancouver:
Costa BJDd. 3D Routing with Context Awareness
. [Internet] [Thesis]. Universidade Federal de Pernambuco; 2009. [cited 2021 Jan 26].
Available from: http://repositorio.ufpe.br/handle/123456789/1771.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Costa BJDd. 3D Routing with Context Awareness
. [Thesis]. Universidade Federal de Pernambuco; 2009. Available from: http://repositorio.ufpe.br/handle/123456789/1771
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
UCLA
18.
Mena, Jorge.
Mobile Service Continuity in a Heterogeneous Wireless Network Environment.
Degree: Computer Science, 2017, UCLA
URL: http://www.escholarship.org/uc/item/4pj9z4t3
► Mobile devices such as laptops and smartphones are currently equipped with multiple network interfaces, allowing them to reach the Internet via multiple paths. When a…
(more)
▼ Mobile devices such as laptops and smartphones are currently equipped with multiple network interfaces, allowing them to reach the Internet via multiple paths. When a running application connects to a service in a remote computer host through the Internet, it leverages on transport and network protocols such as those in the TCP/IP stack expecting continuous, fluent connectivity regardless of which network the mobile device uses. The current state-of-the-art transport protocol that dominates in the Internet is TCP; however, TCP does not allow continuous connectivity when a mobile device leaves the network coverage of an access point. It is expected from a typical device that can connect to both WiFi and cellular networks that it can automatically hand over to an available cellular network once WiFi coverage disappears, and vice-versa. Multipath TCP is a recently proposed transport protocol, backward compatible to TCP, that allows for seamless handovers when new Internet paths appear. This work studies the performance of MPTCP to truly achieve service continuity, with handovers whenever new Internet paths are available, in highly mobile scenarios, such as vehicles engaged into VANET configurations. There may be situations, however, when handovers lead to performance degradation because the newly discovered Internet paths have poor network characteristics. This thesis also addresses the problem of path selection in MPTCP when mobile devices are configured to use at most one network interface prioritizing battery performance; this is the default configuration in smartphones. In all, this thesis advocates for the use of Multipath TCP to truly achieve service continuity for end-to-end connections in both static and highly dynamic mobile settings. It does not consider MPTCP as a substitution to TCPbut a natural evolution from the Internet it was designed for to Internet today.
Subjects/Keywords: Computer science; Heterogeneous Networks; LTE; Multipath TCP; WiFi; Wireless Networks
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Manager
APA (6th Edition):
Mena, J. (2017). Mobile Service Continuity in a Heterogeneous Wireless Network Environment. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/4pj9z4t3
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mena, Jorge. “Mobile Service Continuity in a Heterogeneous Wireless Network Environment.” 2017. Thesis, UCLA. Accessed January 26, 2021.
http://www.escholarship.org/uc/item/4pj9z4t3.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mena, Jorge. “Mobile Service Continuity in a Heterogeneous Wireless Network Environment.” 2017. Web. 26 Jan 2021.
Vancouver:
Mena J. Mobile Service Continuity in a Heterogeneous Wireless Network Environment. [Internet] [Thesis]. UCLA; 2017. [cited 2021 Jan 26].
Available from: http://www.escholarship.org/uc/item/4pj9z4t3.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mena J. Mobile Service Continuity in a Heterogeneous Wireless Network Environment. [Thesis]. UCLA; 2017. Available from: http://www.escholarship.org/uc/item/4pj9z4t3
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Rochester
19.
Feng, Chen-Hsiang.
Stack architectures and protocols for emerging wireless
networks.
Degree: PhD, 2013, University of Rochester
URL: http://hdl.handle.net/1802/27213
► Recent devices developed for emerging wireless networks, such as 4G cellular networks, wireless mesh networks, and mobile ad hoc networks, support multiple communication substrates and…
(more)
▼ Recent devices developed for emerging wireless
networks, such as 4G cellular networks,
wireless mesh networks,
and mobile ad hoc networks, support multiple communication
substrates and require execution of multiple protocols within a
layer, which
cannot be supported efficiently by traditional
layered protocol stack approaches. Our
goal in this thesis is to
discover the minimal set of requirements for simultaneously
supporting the use of multiple protocols in the same stack layer
without requiring modifications
of the protocols and retaining
that the modularity of the stack architecture so
that future
protocols can easily be incorporated.
To
achieve this goal, we propose Universal Protocol Stack (UPS), which
provides
support for the execution of multiple protocols within a
layer simultaneously in a modular
way through packet-switching,
information-sharing, and memory management. The
implementation and
simulations of UPS show that the overhead incurred to implement
UPS is very low, and little or no modifications are required to
adapt existing protocols
to the UPS framework, yet there is
benefit to the application in terms of reduced traffic
or reduced
delay/energy. As an example, we develop an approach to support
multiple
radio interfaces by abstracting all the available
interfaces using a single virtual interface
within the UPS
framework. The selection of the specific physical interface to use
per
packet is done by the virtual interface, thus ensuring that no
modifications of the upper
layer protocols are required. This
provides the opportunity for algorithms at the virtual
interface
to optimize the selection of the physical interface to improve the
network performance.
Results from simulations show that the use of
a virtual interface is feasible
and can improve the network
performance.
While new protocol stack
architectures are important to support multiple protocols
and
communication interfaces, efficient protocols are equally important
to support
emerging networks. We propose a stateless
receiver-based multicast protocol, called
RBMulticast
(Receiver-Based Multicast), which removes the need for costly
multicast
tree and neighbor table maintenance, yet provides high
success rates and low delay.
This makes RBMulticast an excellent
choice for multicasting in dynamic networks,
where state
maintenance is costly. Additionally, using the idea of
receiver-based routing
for convergecast transmissions, we find the
duty cycle of a node as a function of its
distance to the sink to
minimize the expected energy dissipation.
Subjects/Keywords: Heterogeneous networks; Multicast routing; Protocol stack; Sensor networks; Stateless routing
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Manager
APA (6th Edition):
Feng, C. (2013). Stack architectures and protocols for emerging wireless
networks. (Doctoral Dissertation). University of Rochester. Retrieved from http://hdl.handle.net/1802/27213
Chicago Manual of Style (16th Edition):
Feng, Chen-Hsiang. “Stack architectures and protocols for emerging wireless
networks.” 2013. Doctoral Dissertation, University of Rochester. Accessed January 26, 2021.
http://hdl.handle.net/1802/27213.
MLA Handbook (7th Edition):
Feng, Chen-Hsiang. “Stack architectures and protocols for emerging wireless
networks.” 2013. Web. 26 Jan 2021.
Vancouver:
Feng C. Stack architectures and protocols for emerging wireless
networks. [Internet] [Doctoral dissertation]. University of Rochester; 2013. [cited 2021 Jan 26].
Available from: http://hdl.handle.net/1802/27213.
Council of Science Editors:
Feng C. Stack architectures and protocols for emerging wireless
networks. [Doctoral Dissertation]. University of Rochester; 2013. Available from: http://hdl.handle.net/1802/27213
University of Toronto
20.
Cui, Zhe.
Resource Allocation in Backhaul Constrained Small Cell Networks.
Degree: 2015, University of Toronto
URL: http://hdl.handle.net/1807/69611
► Small cell networks have the potential to significantly increase data rates in existing cellular networks by increasing frequency reuse due to reduced transmit powers. Contrary…
(more)
▼ Small cell networks have the potential to significantly increase data rates in existing cellular networks by increasing frequency reuse due to reduced transmit powers. Contrary to their large cell counterparts, small cell access points (APs) are connected to the core network via a backhaul link with limited capacity.
In this thesis, we study the joint resource allocation problem of maximizing the weighted sum rate of users in small cell networks where APs are subject to finite backhaul capacity constraints.
We develop a low-complexity iterative algorithm for the case of single antenna (SISO) and multiple antenna (MISO) APs that converges to a locally optimal solution of this non-convex problem. The key innovation is the efficient use of bisection search to satisfy both power and backhaul constraints resulting in decreased complexity. Distributed and semi-distributed variants of the algorithm are provided that allow trade-off between signaling overhead and performance.
M.A.S.
Advisors/Committee Members: Adve, Raviraj, Electrical and Computer Engineering.
Subjects/Keywords: backhaul; heterogeneous networks; resource allocation; small cell networks; wireless; 0544
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Manager
APA (6th Edition):
Cui, Z. (2015). Resource Allocation in Backhaul Constrained Small Cell Networks. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/69611
Chicago Manual of Style (16th Edition):
Cui, Zhe. “Resource Allocation in Backhaul Constrained Small Cell Networks.” 2015. Masters Thesis, University of Toronto. Accessed January 26, 2021.
http://hdl.handle.net/1807/69611.
MLA Handbook (7th Edition):
Cui, Zhe. “Resource Allocation in Backhaul Constrained Small Cell Networks.” 2015. Web. 26 Jan 2021.
Vancouver:
Cui Z. Resource Allocation in Backhaul Constrained Small Cell Networks. [Internet] [Masters thesis]. University of Toronto; 2015. [cited 2021 Jan 26].
Available from: http://hdl.handle.net/1807/69611.
Council of Science Editors:
Cui Z. Resource Allocation in Backhaul Constrained Small Cell Networks. [Masters Thesis]. University of Toronto; 2015. Available from: http://hdl.handle.net/1807/69611
University of Plymouth
21.
Frei, Sandra.
Optimisation of traffic steering for heterogeneous mobile networks.
Degree: PhD, 2015, University of Plymouth
URL: http://hdl.handle.net/10026.1/3480
► Mobile networks have changed from circuit switched to IP-based mobile wireless packet switched networks. This paradigm shift led to new possibilities and challenges. The development…
(more)
▼ Mobile networks have changed from circuit switched to IP-based mobile wireless packet switched networks. This paradigm shift led to new possibilities and challenges. The development of new capabilities based on IP-based networks is ongoing and raises new problems that have to be tackled, for example, the heterogeneity of current radio access networks and the wide range of data rates, coupled with user requirements and behaviour. A typical example of this shift is the nature of traffic, which is currently mostly data-based; further, forecasts based on market and usage trends indicate a data traffic increase of nearly 11 times between 2013 and 2018. The majority of this data traffic is predicted to be multimedia traffic, such as video streaming and live video streaming combined with voice traffic, all prone to delay, jitter, and packet loss and demanding high data rates and a high Quality of Service (QoS) to enable the provision of valuable service to the end-user. While the demands on the network are increasing, the end-user devices become more mobile and end-user demand for the capability of being always on, anytime and anywhere. The combination of end-user devices mobility, the required services, and the significant traffic loads generated by all the end-users leads to a pressing demand for adequate measures to enable the fulfilment of these requirements. The aim of this research is to propose an architecture which provides smart, intelligent and per end-user device individualised traffic steering for heterogeneous mobile networks to cope with the traffic volume and to fulfil the new requirements on QoS, mobility, and real-time capabilities. The proposed architecture provides traffic steering mechanisms based on individual context data per end-user device enabling the generation of individual commands and recommendations. In order to provide valuable services for the end-user, the commands and recommendations are distributed to the end-user devices in real-time. The proposed architecture does not require any proprietary protocols to facilitate its integration into the existing network infrastructure of a mobile network operator. The proposed architecture has been evaluated through a number of use cases. A proof-of-concept of the proposed architecture, including its core functionality, was implemented using the ns-3 network simulator. The simulation results have shown that the proposed architecture achieves improvements for traffic steering including traffic offload and handover. Further use cases have demonstrated that it is possible to achieve benefits in multiple other areas, such as for example improving the energy efficiency, improving frequency interference management, and providing additional or more accurate data to 3rd party to improve their services.
Subjects/Keywords: 004.6; individual traffic steering; HetNets (Heterogeneous Networks); mobile networks; offload; handover
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APA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Frei, S. (2015). Optimisation of traffic steering for heterogeneous mobile networks. (Doctoral Dissertation). University of Plymouth. Retrieved from http://hdl.handle.net/10026.1/3480
Chicago Manual of Style (16th Edition):
Frei, Sandra. “Optimisation of traffic steering for heterogeneous mobile networks.” 2015. Doctoral Dissertation, University of Plymouth. Accessed January 26, 2021.
http://hdl.handle.net/10026.1/3480.
MLA Handbook (7th Edition):
Frei, Sandra. “Optimisation of traffic steering for heterogeneous mobile networks.” 2015. Web. 26 Jan 2021.
Vancouver:
Frei S. Optimisation of traffic steering for heterogeneous mobile networks. [Internet] [Doctoral dissertation]. University of Plymouth; 2015. [cited 2021 Jan 26].
Available from: http://hdl.handle.net/10026.1/3480.
Council of Science Editors:
Frei S. Optimisation of traffic steering for heterogeneous mobile networks. [Doctoral Dissertation]. University of Plymouth; 2015. Available from: http://hdl.handle.net/10026.1/3480
University of Technology, Sydney
22.
Zhang, Qinzhe.
Exploring heterogeneous social information networks for recommendation.
Degree: 2017, University of Technology, Sydney
URL: http://hdl.handle.net/10453/120266
► A basic premise behind our study of heterogeneous social information networks for recommendation is that a complex network structure leads to a large volume of…
(more)
▼ A basic premise behind our study of heterogeneous social information networks for recommendation is that a complex network structure leads to a large volume of implicit but valuable information which can significantly enhance recommendation performance. In our work, we combine the global popularity and personalized features of travel destinations and also integrate temporal sensitive patterns to form spatial-temporal wise trajectory recommendation. We then develop a model to identify representative areas of interest (AOIs) for travellers based on a large scale dataset consisting of geo-tagged images and check-ins. In addition, we introduce active time frame analysis to determine the most suitable time to visit an AOI during the day. The outcome of this work can suggest relevant personalized travel recommendations to assist people who are arriving in new cities.
Another important part of our research is to study how “local” and “global” social influences exert their impact on user preferences or purchasing decisions. We first simulate the social influence diffusion in the network to find the global and local influence nodes. We then embed these two different kinds of influence data, as regularization terms, into a traditional recommendation model to improve its accuracy. We find that “Community Stars” and “Web Celebrities”, represent “local” and “global” influence nodes respectively, a phenomenon which does exist and can help us to generate significantly better recommendation results.
A central topic of our thesis is also to utilize a large heterogeneous social information network to identify the collective market hyping behaviours. Combating malicious user attacks is also a key task in the recommendation research field. In our study, we investigate the evolving spam strategies which can escape from most of the traditional detection methods. Based on the investigation of the advanced spam technique, we define three kinds of heterogeneous information networks to model the patterns in such spam activities and we then propose an unsupervised learning model which combines the three networks in an attempt to discover collective hyping activities. Overall, we utilize the heterogeneous social information network to enhance recommendation quality, not only by improving the user experience and recommendation accuracy, but also by ensuring that quality and genuine information is not overwhelmed by advanced hyping activities.
Subjects/Keywords: Mining heterogeneous information networks.; Data mining.; Information networks.
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APA ·
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MLA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhang, Q. (2017). Exploring heterogeneous social information networks for recommendation. (Thesis). University of Technology, Sydney. Retrieved from http://hdl.handle.net/10453/120266
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Zhang, Qinzhe. “Exploring heterogeneous social information networks for recommendation.” 2017. Thesis, University of Technology, Sydney. Accessed January 26, 2021.
http://hdl.handle.net/10453/120266.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zhang, Qinzhe. “Exploring heterogeneous social information networks for recommendation.” 2017. Web. 26 Jan 2021.
Vancouver:
Zhang Q. Exploring heterogeneous social information networks for recommendation. [Internet] [Thesis]. University of Technology, Sydney; 2017. [cited 2021 Jan 26].
Available from: http://hdl.handle.net/10453/120266.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zhang Q. Exploring heterogeneous social information networks for recommendation. [Thesis]. University of Technology, Sydney; 2017. Available from: http://hdl.handle.net/10453/120266
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Victoria
23.
Ahmadi, Maryam.
Modeling and analysis of wireless cognitive radio networks: a geometrical probability approach.
Degree: Department of Computer Science, 2016, University of Victoria
URL: http://hdl.handle.net/1828/7055
► Wireless devices and applications have been an unavoidable part of human lives in the past decade. In the past few years, the global mobile data…
(more)
▼ Wireless devices and applications have been an unavoidable part of human lives in the past decade. In the past few years, the global mobile data traffic has grown considerably and is expected to grow even faster in future.
Given the fact that the number of wireless nodes has significantly increased, the contention and interference on the license-free industrial, scientific, and medical band has become severer than ever. Cognitive radio nodes were introduced in the past decade to mitigate the issues related to spectrum scarcity.
In this dissertation, we focus on the interference and performance analysis of
networks coexisting with cognitive radio
networks and address the design and analysis of spectrum allocation and routing for cognitive radio
networks. Spectrum allocation enables nodes to construct a link on a common channel at the same time so they can start communicating with each other. We introduce a new approach for the modeling and analysis of interference and spectrum allocation schemes for cognitive radio
networks with arbitrarily-shaped network regions.
First, for the first time in the literature, we propose a simple and efficient approach that can derive the distribution of the distance between an arbitrary interior/exterior reference point and a random point within an arbitrary convex/concave irregular polygon. This tool is essential in analyzing important distance-related performance metrics in wireless communication
networks.
Second, considering the importance of interference analysis in cognitive radio
networks and its important role in designing spectrum allocation schemes, we model and analyze a
heterogeneous cellular network consisting of several cognitive femto cells and a coexisting multi-cell network. Besides the cumulative interference, important distance-related performance metrics have been investigated, such as the signal-to-interference ratio and outage probability.
Finally, the spectrum allocation and routing problems in cognitive radio
networks have been discussed. Considering a wireless cognitive radio network coexisting with a cellular network with irregular polygon-shaped cells, we have used the tools developed in this dissertation and proposed a joint spectrum allocation and routing scheme.
Advisors/Committee Members: Pan, Jianping (supervisor).
Subjects/Keywords: Cognitive Radio Networks; Geometrical Probability; Interference Analysis; Irregular Polygons; Heterogeneous Networks
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APA (6th Edition):
Ahmadi, M. (2016). Modeling and analysis of wireless cognitive radio networks: a geometrical probability approach. (Thesis). University of Victoria. Retrieved from http://hdl.handle.net/1828/7055
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ahmadi, Maryam. “Modeling and analysis of wireless cognitive radio networks: a geometrical probability approach.” 2016. Thesis, University of Victoria. Accessed January 26, 2021.
http://hdl.handle.net/1828/7055.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ahmadi, Maryam. “Modeling and analysis of wireless cognitive radio networks: a geometrical probability approach.” 2016. Web. 26 Jan 2021.
Vancouver:
Ahmadi M. Modeling and analysis of wireless cognitive radio networks: a geometrical probability approach. [Internet] [Thesis]. University of Victoria; 2016. [cited 2021 Jan 26].
Available from: http://hdl.handle.net/1828/7055.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ahmadi M. Modeling and analysis of wireless cognitive radio networks: a geometrical probability approach. [Thesis]. University of Victoria; 2016. Available from: http://hdl.handle.net/1828/7055
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Georgia Tech
24.
Chavarria Reyes, Elias.
Energy modeling and analysis in heterogeneous cellular systems.
Degree: PhD, Electrical and Computer Engineering, 2014, Georgia Tech
URL: http://hdl.handle.net/1853/54299
► The objective of this thesis is to model and analyze the energy consumption in heterogeneous cellular systems and develop techniques to minimize it. First, the…
(more)
▼ The objective of this thesis is to model and analyze the energy consumption in
heterogeneous cellular systems and develop techniques to minimize it. First, the energy consumption is modeled and analyzed for multi-layered
heterogeneous wireless systems. This work encompasses the characterization of all the energy consumed at the base stations. Then, a novel on-off and cell-association scheme is proposed to minimize the overall network energy consumption while satisfying the spatially- and temporally-varying traffic demands. Second, we exploit the use of multi-stream carrier aggregation not only to improve the energy efficiency, but also to balance it with the conflicting objective of capacity maximization. Third, we analyze the performance of discontinuous reception methods for energy savings within the user equipments. Then, for scenarios that support carrier aggregation, we develop a cross-carrier-aware technique that further enhances such savings with minimum impact on the packet delay. Fourth, the use of small cells as an energy-saving tool and its limitations are analyzed and modeled in OPNET, a high-fidelity simulation and development platform. To bypass such limitations, a novel small cell solution is proposed, modeled, and analyzed in OPNET and then compared against its existing alternative.
Advisors/Committee Members: Akyildiz, Ian F. (advisor), Ma, Xiaoli (committee member), Weitnauer, Mary A. (committee member), Li, Geoffrey Y. (committee member), Ammar, Mostafa H. (committee member).
Subjects/Keywords: Cellular networks; Energy efficiency; Energy savings; Heterogeneous cellular networks
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APA (6th Edition):
Chavarria Reyes, E. (2014). Energy modeling and analysis in heterogeneous cellular systems. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/54299
Chicago Manual of Style (16th Edition):
Chavarria Reyes, Elias. “Energy modeling and analysis in heterogeneous cellular systems.” 2014. Doctoral Dissertation, Georgia Tech. Accessed January 26, 2021.
http://hdl.handle.net/1853/54299.
MLA Handbook (7th Edition):
Chavarria Reyes, Elias. “Energy modeling and analysis in heterogeneous cellular systems.” 2014. Web. 26 Jan 2021.
Vancouver:
Chavarria Reyes E. Energy modeling and analysis in heterogeneous cellular systems. [Internet] [Doctoral dissertation]. Georgia Tech; 2014. [cited 2021 Jan 26].
Available from: http://hdl.handle.net/1853/54299.
Council of Science Editors:
Chavarria Reyes E. Energy modeling and analysis in heterogeneous cellular systems. [Doctoral Dissertation]. Georgia Tech; 2014. Available from: http://hdl.handle.net/1853/54299
Virginia Tech
25.
Semiari, Omid.
Context-Aware Resource Management and Performance Analysis of Millimeter Wave and Sub-6 GHz Wireless Networks.
Degree: PhD, Electrical Engineering, 2017, Virginia Tech
URL: http://hdl.handle.net/10919/86482
► Emerging wireless networks are foreseen as an integration of heterogeneous spectrum bands, wireless access technologies, and backhaul solutions, as well as a large-scale interconnection of…
(more)
▼ Emerging wireless
networks are foreseen as an integration of
heterogeneous spectrum bands, wireless access technologies, and backhaul solutions, as well as a large-scale interconnection of devices, people, and vehicles. Such a heterogeneity will range from the proliferation of multi-tasking user devices with different capabilities such as smartphones and tablets to the deployment of multi-mode access points that can operate over
heterogeneous frequency bands spanning both sub-6 GHz microwave and high-frequency millimeter wave (mmW) frequencies bands. This
heterogeneous ecosystem will yield new challenges and opportunities for wireless resource management. On the one hand, resource management can exploit user and network-specific context information, such as application type, social metrics, or operator pricing, to develop application-driven, context-aware
networks. Similarly, multiple frequency bands can be leveraged to meet the stringent and
heterogeneous quality-of-service (QoS) requirements of the new wireless services such as video streaming and interactive gaming. On the other hand, resource management in such
heterogeneous, multi-band, and large-scale wireless systems requires distributed frameworks that can effectively utilize all available resources while operating with manageable overhead. The key goal of this dissertation is therefore to develop novel, self-organizing, and low-complexity resource management protocols – using techniques from matching theory, optimization, and machine learning – to address critical resource allocation problems for emerging
heterogeneous wireless systems while explicitly modeling and factoring diverse network context information.
Towards achieving this goal, this dissertation makes a number of key contributions.
First, a novel context-aware scheduling framework is developed for enabling dual-mode base stations to efficiently and jointly utilize mmW and microwave frequency resources while maximizing the number of user applications whose stringent delay requirements are satisfied.
The results show that the proposed approach will be able to significantly improve the QoS per application and decrease the outage probability. Second, novel solutions are proposed to address both network formation and resource allocation problems in multi-hop wireless backhaul
networks that operate at mmW frequencies. The proposed framework motivates collaboration among multiple network operators by resource sharing to reduce the cost of backhauling, while jointly accounting for both wireless channel characteristics and economic factors. Third, a novel framework is proposed to exploit high-capacity mmW communications and device-level caching to minimize handover failures as well as energy consumption by inter-frequency measurements, and to provide seamless mobility in dense
heterogeneous mmW-microwave small cell
networks (SCNs). Fourth, a new cell association algorithm is proposed, based on matching theory with minimum quota constraints, to optimize load balancing in integrated mmW-microwave…
Advisors/Committee Members: Saad, Walid (committeechair), Dhillon, Harpreet Singh (committee member), Reed, Jeffrey H. (committee member), Zheng, Xiaoyu (committee member), Plassmann, Paul E. (committee member).
Subjects/Keywords: Heterogeneous Networks; Millimeter Wave Communications; Cellular Networks; Matching Theory; Context Information
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APA (6th Edition):
Semiari, O. (2017). Context-Aware Resource Management and Performance Analysis of Millimeter Wave and Sub-6 GHz Wireless Networks. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/86482
Chicago Manual of Style (16th Edition):
Semiari, Omid. “Context-Aware Resource Management and Performance Analysis of Millimeter Wave and Sub-6 GHz Wireless Networks.” 2017. Doctoral Dissertation, Virginia Tech. Accessed January 26, 2021.
http://hdl.handle.net/10919/86482.
MLA Handbook (7th Edition):
Semiari, Omid. “Context-Aware Resource Management and Performance Analysis of Millimeter Wave and Sub-6 GHz Wireless Networks.” 2017. Web. 26 Jan 2021.
Vancouver:
Semiari O. Context-Aware Resource Management and Performance Analysis of Millimeter Wave and Sub-6 GHz Wireless Networks. [Internet] [Doctoral dissertation]. Virginia Tech; 2017. [cited 2021 Jan 26].
Available from: http://hdl.handle.net/10919/86482.
Council of Science Editors:
Semiari O. Context-Aware Resource Management and Performance Analysis of Millimeter Wave and Sub-6 GHz Wireless Networks. [Doctoral Dissertation]. Virginia Tech; 2017. Available from: http://hdl.handle.net/10919/86482
Indian Institute of Science
26.
Shabbir Ali, Mohd.
Interference Modeling in Wireless Networks.
Degree: MSc Engg, Faculty of Engineering, 2017, Indian Institute of Science
URL: http://etd.iisc.ac.in/handle/2005/2729
► Cognitive radio (CR) networks and heterogeneous cellular networks are promising approaches to satisfy the demand for higher data rates and better connectivity. A CR network…
(more)
▼ Cognitive radio (CR)
networks and
heterogeneous cellular
networks are promising approaches to satisfy the demand for higher data rates and better connectivity. A CR network increases the utilization of the radio spectrum by opportunistically using it.
Heterogeneous networks provide high data rates and improved connectivity by spatially reusing the spectrum and by bringing the network closer to the user. Interference presents a critical challenge for reliable communication in these
networks. Accurately modeling it is essential in ensuring a successful design and deployment of these
networks.
We first propose modeling the aggregate interference power at a primary receiver (PU-Rx) caused from transmissions by randomly located cognitive users (CUs) in a CR network as a shifted lognormal random process. Its parameters are determined using a moment matching method. Extensive benchmarking shows that the proposed model is more accurate than the lognormal and Gaussian process models considered in the literature, even for a relatively dense deployment of CUs. It also compares favorably with the asymptotically exact stable and symmetric truncated stable distribution models, except at high CU densities. Our model accounts for the effect of imperfect spectrum sensing, interweave and underlay modes of CR operation, and path-loss, time-correlated shad-owing and fading of the various links in the network. It leads to new expressions for the probability distribution function, level crossing rate (LCR), and average exceedance duration (AED). The impact of cooperative spectrum sensing is also characterized. We also apply and validate the proposed model by using it to redesign the primary exclusive zone to account for the time-varying nature of interference.
Next we model the uplink inter-cell aggregate interference power in homogeneous and
heterogeneous cellular systems as a simpler lognormal random variable. We develop a new moment generating function (MGF) matching method to determine the lognormal’s parameters. Our model accounts for the transmit power control, peak transmit power constraint, small scale fading and large scale shadowing, and randomness in the number of interfering mobile stations and their locations. In
heterogeneous net-works, the random nature of the number and locations of low power base stations is also accounted for. The accuracy of the proposed model is verified for both small and large values of interference. While not perfect, it is more accurate than the conventional Gaussian and moment-matching-based lognormal and Gamma distribution models. It is also performs better than the symmetric-truncated stable and stable distribution models, except at higher user density.
Advisors/Committee Members: Mehta, Neelesh B (advisor).
Subjects/Keywords: Wireless Networks; Cognitive Radios; Network Modeling; Cognitive Radio Networks; Cellular Networks; Heterogeneous Networks; Homogeneous Cellular Networks; Heterogeneous Cellular Networks; Cognitive Radio Systems; Cognitive Radio (CR); Communication Engineering
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APA (6th Edition):
Shabbir Ali, M. (2017). Interference Modeling in Wireless Networks. (Masters Thesis). Indian Institute of Science. Retrieved from http://etd.iisc.ac.in/handle/2005/2729
Chicago Manual of Style (16th Edition):
Shabbir Ali, Mohd. “Interference Modeling in Wireless Networks.” 2017. Masters Thesis, Indian Institute of Science. Accessed January 26, 2021.
http://etd.iisc.ac.in/handle/2005/2729.
MLA Handbook (7th Edition):
Shabbir Ali, Mohd. “Interference Modeling in Wireless Networks.” 2017. Web. 26 Jan 2021.
Vancouver:
Shabbir Ali M. Interference Modeling in Wireless Networks. [Internet] [Masters thesis]. Indian Institute of Science; 2017. [cited 2021 Jan 26].
Available from: http://etd.iisc.ac.in/handle/2005/2729.
Council of Science Editors:
Shabbir Ali M. Interference Modeling in Wireless Networks. [Masters Thesis]. Indian Institute of Science; 2017. Available from: http://etd.iisc.ac.in/handle/2005/2729
Penn State University
27.
Mishra, Asit Kumar.
Design and Analysis of Heterogeneous Networks for Chip-Multiprocessors.
Degree: 2011, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/11995
► Rarely has there been as challenging and exciting a time for research in computer architecture as now. While, the proverbial Moore’s law has consistently helped…
(more)
▼ Rarely has there been as challenging and exciting a time for research in computer architecture as now. While, the proverbial Moore’s law has consistently helped architects integrate more and more silicon transistors in a single die, device constraints of power, heat, and reliability has forced the computer industry to shift focus from single processor core performance to instantiating multiple processor cores on a chip. In this quest for integrating a large number of cores on a single chip, one particular area of computer architecture that has come into prominence is the interconnection network on a chip (also called network-on-chip or NoC). NoCs seek to provide a scalable, energy-efficient and high-bandwidth communication substrate for future multi-core and many-core architectures - an aspect that critically dictates future chip designs.
Most of the prior research in NoC has focussed on optimizing the NoC considering it as a homogeneous system i.e. all optimizations proposed, equally affect all the components in the NoC substrate. However, this dissertation demonstrates that the resources in the NoC (precisely, buffers and links) are not always equally utilized, and that not all applications demand similar resources from the underlying interconnection substrate. Hence, this dissertation argues that better and smarter NoCs can be architected by considering the inherent heterogeneity in NoCs from both the network architecture perspective and from the applications’ perspective. Further, considering the fact that future multicores and systems-on-chip architectures will have
heterogeneous cores and compute engines, and host diverse applications, it is also inevitable that not all components will demand similar responses from the NoC and neither will these compute engines stress the NoC uniformly. Thus, it is compelling to think of
heterogeneous NoCs for such
heterogeneous systems. To this end, this dissertation argues in favor of NoCs that factor heterogeneity as a first-order design objective while architecting them for future multi-core systems.
In this pursuit, this dissertation investigates micro-architectural techniques that exploit heterogeneity at the network resource consumption level (following a bottom-up approach) and from applications’ demand/requirement perspective (following a top-down approach). With the bottom-up approach, heterogeneity is exploited with the key observation that not all resources in an NoC are equally utilized when employing a typical network topology and a network routing protocol. With the top-down approach, heterogeneity is exploited starting from the applications’ demand perspective with the key observation that not all applications require similar resources from the underlying network substrate. Based on these two approaches, this dissertation proposes four techniques with the overall goal of designing high-performance and energy-efficient NoCs.
The first scheme, called Router Architecture with Frequency Tuning (RAFT), exploits heterogeneity in the buffers of the on-chip routers…
Advisors/Committee Members: Chitaranjan Das, Dissertation Advisor/Co-Advisor, Chitaranjan Das, Committee Chair/Co-Chair, Vijaykrishnan Narayanan, Committee Member, Mahmut Taylan Kandemir, Committee Member, William Kenneth Jenkins, Committee Member, Onur Mutlu, Committee Member.
Subjects/Keywords: NoC; network-on-chip; router; heterogeneous NoC; heterogeneous networks; multicore; CMP; STT-RAM
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APA (6th Edition):
Mishra, A. K. (2011). Design and Analysis of Heterogeneous Networks for Chip-Multiprocessors. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/11995
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mishra, Asit Kumar. “Design and Analysis of Heterogeneous Networks for Chip-Multiprocessors.” 2011. Thesis, Penn State University. Accessed January 26, 2021.
https://submit-etda.libraries.psu.edu/catalog/11995.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mishra, Asit Kumar. “Design and Analysis of Heterogeneous Networks for Chip-Multiprocessors.” 2011. Web. 26 Jan 2021.
Vancouver:
Mishra AK. Design and Analysis of Heterogeneous Networks for Chip-Multiprocessors. [Internet] [Thesis]. Penn State University; 2011. [cited 2021 Jan 26].
Available from: https://submit-etda.libraries.psu.edu/catalog/11995.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mishra AK. Design and Analysis of Heterogeneous Networks for Chip-Multiprocessors. [Thesis]. Penn State University; 2011. Available from: https://submit-etda.libraries.psu.edu/catalog/11995
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Northeastern University
28.
Jing, Yi.
A randomized protocol for node covering in heterogeneous wireless sensor networks.
Degree: MS, Department of Electrical and Computer Engineering, 2016, Northeastern University
URL: http://hdl.handle.net/2047/D20211576
► In this thesis we propose a randomized distributed protocol for heterogeneous wireless sensor networks (WSNs) with two kinds of nodes: White nodes and red nodes.…
(more)
▼ In this thesis we propose a randomized distributed protocol for heterogeneous wireless sensor networks (WSNs) with two kinds of nodes: White nodes and red nodes. The aim of our protocol is to find a set of red nodes as small as possible fulfilling the requirement that every white node is neighbor to (or is covered by) at least ru red nodes.; Our protocol, termed REDS, proceeds in phases that are distributed and localized, producing the set of red nodes that provide the required covering. We implement REDS in the simulator Castalia, using the CC2420-based radio hardware model. In the experiments we evaluate the performance of REDS in terms of the size of the covering set and of node energy consumption in scenarios with varying percentages of white nodes and covering requirements. We observe that the size of the covering set reduces as the number of nodes increases and is proportional to both the percentage of white nodes as well as the covering requirement ru. In addition, the average energy consumption of a node running REDS grows with the network size, with the percentage of white nodes in the network and with the covering requirement ru. We compare the REDS protocol with a centralized algorithm for set covering, termed BESTDEGREES, and observe that in general REDS produces sets of covering (red) nodes that are smaller than those produced by BESTDEGREES.
Subjects/Keywords: heterogeneous; node covering; Wireless sensor networks; Computer network protocols; Mathematical optimization; Heterogeneous computing
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APA (6th Edition):
Jing, Y. (2016). A randomized protocol for node covering in heterogeneous wireless sensor networks. (Masters Thesis). Northeastern University. Retrieved from http://hdl.handle.net/2047/D20211576
Chicago Manual of Style (16th Edition):
Jing, Yi. “A randomized protocol for node covering in heterogeneous wireless sensor networks.” 2016. Masters Thesis, Northeastern University. Accessed January 26, 2021.
http://hdl.handle.net/2047/D20211576.
MLA Handbook (7th Edition):
Jing, Yi. “A randomized protocol for node covering in heterogeneous wireless sensor networks.” 2016. Web. 26 Jan 2021.
Vancouver:
Jing Y. A randomized protocol for node covering in heterogeneous wireless sensor networks. [Internet] [Masters thesis]. Northeastern University; 2016. [cited 2021 Jan 26].
Available from: http://hdl.handle.net/2047/D20211576.
Council of Science Editors:
Jing Y. A randomized protocol for node covering in heterogeneous wireless sensor networks. [Masters Thesis]. Northeastern University; 2016. Available from: http://hdl.handle.net/2047/D20211576
Carnegie Mellon University
29.
Benigni, Matthew Curran.
Detection and Analysis of Online Extremist Communities.
Degree: 2017, Carnegie Mellon University
URL: http://repository.cmu.edu/dissertations/949
► Online social networks have become a powerful venue for political activism. In many cases large, insular online communities form that have been shown to be…
(more)
▼ Online social networks have become a powerful venue for political activism. In many cases large, insular online communities form that have been shown to be powerful diffusion mechanisms of both misinformation and propaganda. In some cases these groups users advocate actions or policies that could be construed as extreme along nearly any distribution of opinion, and are thus called Online Extremist Communities (OECs). Although these communities appear increasingly common, little is known about how these groups form or the methods used to influence them. The work in this thesis provides researchers a methodological framework to study these groups by answering three critical research questions: How can we detect large dynamic online activist or extremist communities? What automated tools are used to build, isolate, and influence these communities? What methods can be used to gain novel insight into large online activist or extremist communities? These group members social ties can be inferred based on the various affordances offered by OSNs for group curation. By developing heterogeneous, annotated graph representations of user behavior I can efficiently extract online activist discussion cores using an ensemble of unsupervised machine learning methods. I call this technique Ensemble Agreement Clustering. Through manual inspection, these discussion cores can then often be used as training data to detect the larger community. I present a novel supervised learning algorithm called Multiplex Vertex Classification for network bipartition on heterogeneous, annotated graphs. This methodological pipeline has also proven useful for social botnet detection, and a study of large, complex social botnets used for propaganda dissemination is provided as well. Throughout this thesis I provide Twitter case studies including communities focused on the Islamic State of Iraq and al-Sham (ISIS), the ongoing Syrian Revolution, the Euromaidan Movement in Ukraine, as well as the alt-Right.
Subjects/Keywords: Covert Network Detection; Community Detection; Annotated Networks; Multilayer Networks; Heterogeneous Networks; Spectral Clustering
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APA (6th Edition):
Benigni, M. C. (2017). Detection and Analysis of Online Extremist Communities. (Thesis). Carnegie Mellon University. Retrieved from http://repository.cmu.edu/dissertations/949
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Benigni, Matthew Curran. “Detection and Analysis of Online Extremist Communities.” 2017. Thesis, Carnegie Mellon University. Accessed January 26, 2021.
http://repository.cmu.edu/dissertations/949.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Benigni, Matthew Curran. “Detection and Analysis of Online Extremist Communities.” 2017. Web. 26 Jan 2021.
Vancouver:
Benigni MC. Detection and Analysis of Online Extremist Communities. [Internet] [Thesis]. Carnegie Mellon University; 2017. [cited 2021 Jan 26].
Available from: http://repository.cmu.edu/dissertations/949.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Benigni MC. Detection and Analysis of Online Extremist Communities. [Thesis]. Carnegie Mellon University; 2017. Available from: http://repository.cmu.edu/dissertations/949
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Newcastle
30.
Asheralieva, Alia.
Future wireless network architecture.
Degree: PhD, 2014, University of Newcastle
URL: http://hdl.handle.net/1959.13/1051115
► Research Doctorate - Doctor of Philosophy (PhD)
With widespread use of wireless networks and the emergence of multiple Radio Access Technologies (RATs), the present-day network…
(more)
▼ Research Doctorate - Doctor of Philosophy (PhD)
With widespread use of wireless networks and the emergence of multiple Radio Access Technologies (RATs), the present-day network architecture is currently being transformed into the one global infrastructure vision, called Beyond 3rd Generation (B3G) [1]. B3G is a heterogeneous Internet Protocol (IP) based wireless access infrastructure, which aims to provide higher capacity and quality of service (QoS) to the users even considering the limited radio spectrum through support of a cooperative diversity [2] and reconfigurability [3]. In a system with a cooperative diversity each node in the network can act both as an information source and a relay. Such information relay may increase the capacity and diversity gain in wireless networks, leading to the improved performance in terms of both area coverage and QoS [4]. In B3G the cooperative communication assumes that the network infrastructure will rely on more than one RAT: depending on encountered specific conditions (e.g., hot-spot requirements, traffic demands, etc.) at different times in different areas the RATs will cooperate with each other to achieve the maximization of QoS levels offered to users. To support the cooperative communications in B3G, the advanced management functionality is required to deal with the reallocation of traffic to different RATs and sub-networks, as well as the mapping of applications to QoS levels [5-8]. The move towards the reconfigurability concept was initiated by the development of the Cognitive Radio Network (CRN) – the network, where the nodes with fixed licensed spectrum (so-called primary nodes) can share their spectrum resources with nodes without fixed licensed spectrum (secondary nodes) [9]. In B3G the reconfigurability aims to provide essential mechanisms for terminals and sub-networks, to enable them to adapt dynamically and transparently to the most appropriate RAT depending on encountered situation (hot-spot requirements, traffic demands, etc.). The reconfigurability allows for the dynamic allocation of resources (such as bandwidth, service rate, etc.) to RATs, and invokes a variety of new possibilities with respect to the more efficient utilization of available spectrum [1, 9-10]. With regard to the diverse challenges arising upon the development and deployment of B3G, this thesis aims to: 1. Explore the potential ways of implementing the future wireless infrastucture based on existing wireless networking standards and coexistance of air such features ; 2. Study the main principles of cooperative and cognitive communication which lie in: (a)cooperation and information exchange between all member subnetworks; (b)support of reconfiguration capabilities of all nodes/user terminals within the network; (c)coexistence of the nodes/user terminals belonging to different RATs comprising the network ; (d)intelligent resource planning involving cognitive reactive and proactive management of the network resources based on external (environmental) aspects, as well as on goals,…
Advisors/Committee Members: University of Newcastle. Faculty of Engineering & Built Environment, School of Electrical Engineering and Computer Science.
Subjects/Keywords: B3G; cognitive radio networks; cooperative networks; heterogeneous networks; IEEE802.11g; IEEE802.22; LTE; resource allocation
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APA ·
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Manager
APA (6th Edition):
Asheralieva, A. (2014). Future wireless network architecture. (Doctoral Dissertation). University of Newcastle. Retrieved from http://hdl.handle.net/1959.13/1051115
Chicago Manual of Style (16th Edition):
Asheralieva, Alia. “Future wireless network architecture.” 2014. Doctoral Dissertation, University of Newcastle. Accessed January 26, 2021.
http://hdl.handle.net/1959.13/1051115.
MLA Handbook (7th Edition):
Asheralieva, Alia. “Future wireless network architecture.” 2014. Web. 26 Jan 2021.
Vancouver:
Asheralieva A. Future wireless network architecture. [Internet] [Doctoral dissertation]. University of Newcastle; 2014. [cited 2021 Jan 26].
Available from: http://hdl.handle.net/1959.13/1051115.
Council of Science Editors:
Asheralieva A. Future wireless network architecture. [Doctoral Dissertation]. University of Newcastle; 2014. Available from: http://hdl.handle.net/1959.13/1051115
◁ [1] [2] [3] [4] [5] [6] [7] [8] [9] ▶
. 
Open Access Theses and Dissertations