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Massey University
1.
Basu, Debraj.
Non-RSSI based energy efficient transmission power control protocol for low power indoor wireless sensor networks.
Degree: PhD, Engineering, 2016, Massey University
URL: http://hdl.handle.net/10179/8658 
► In this thesis, we present the state-based adaptive power control (S-APC) protocol that is aimed to reduce energy consumption in low power wireless sensors while…
(more)
▼ In this thesis, we present the state-based adaptive power control (S-APC) protocol that is aimed to reduce energy consumption in low power wireless sensors while maintaining an application specific packet success rate requirement. The state-based approach is unique of its kind that dynamically adapt to the varying path losses caused by the movement of mobile sensors, by obstructions appearing between the stationary sensor and the base-station and movements of objects or humans in between two communicating stations. Since the primary reason for a drop in transmitted packets is the poor signal-to-noise ratio, it is important for the sensor to select a set of RF transmission power levels that will deliver the packets within a specified error rate while using the least amount of energy. In a battery-powered wireless sensor node, the use of ARQ (Automatic Repeat reQuest) protocol will lead to retransmissions when an attempt to send a packet fails. The proposed adaptive protocol does not use received signal strength indication (RSSI) based beacon or probe packets nor does it listen to the channel before transmitting for channel estimation. The use of the proposed S-APC protocol is not limited to only sensor network. It is applicable to any kind of radio communication when the transmitting radio frequency (RF) modules have configurable output power and options for retransmission. This proposed protocol can comfortably work on top of existing MAC protocol that is contention based and listens to channel before transmitting.
The hardware used for evaluating the protocol parameters is the nRF24L01p transceiver module from Nordic Semiconductor Inc. This radio module is cheaper than other modules that provide the RSSI values to the chip and the application of the adaptive power control protocol can further reduce the overall deployment and running cost of a sensor network.
The proposed protocol is designed to respond to an unknown and variable radio channel in an energy-efficient manner. The adaptive protocol uses past transmission experience or memory to decide the power level at which the new packet transmission will start. It also uses a drop-off algorithm to ramp down power level as and when required. Simulation has been used to compare the performance with the existing RSSI and non-RSSI based adaptive power control protocol. Results have shown that when the channel condition is between average and poor (ratio of bit energy (Eb) and noise power spectral density (N0) is less than 20 dB), the RSSI based adaptive protocol consumes 10-20% more energy. Following the simulations, exhaustive experimental trials were done to compare S-APC with the existing protocols. It was found that there can be an increase of energy efficiency up-to 33% over fixed power transmission. This protocol could be applied in mobile robots that collect data in real time from sensors and transmit to the base station as well as to body wearable sensors used for monitoring the health conditions of patients in a health facility centre. Overall, this adaptive…
Subjects/Keywords: Adaptive control systems;
Wireless sensor networks
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APA (6th Edition):
Basu, D. (2016). Non-RSSI based energy efficient transmission power control protocol for low power indoor wireless sensor networks. (Doctoral Dissertation). Massey University. Retrieved from http://hdl.handle.net/10179/8658
Chicago Manual of Style (16th Edition):
Basu, Debraj. “Non-RSSI based energy efficient transmission power control protocol for low power indoor wireless sensor networks.” 2016. Doctoral Dissertation, Massey University. Accessed December 13, 2019.
http://hdl.handle.net/10179/8658.
MLA Handbook (7th Edition):
Basu, Debraj. “Non-RSSI based energy efficient transmission power control protocol for low power indoor wireless sensor networks.” 2016. Web. 13 Dec 2019.
Vancouver:
Basu D. Non-RSSI based energy efficient transmission power control protocol for low power indoor wireless sensor networks. [Internet] [Doctoral dissertation]. Massey University; 2016. [cited 2019 Dec 13].
Available from: http://hdl.handle.net/10179/8658.
Council of Science Editors:
Basu D. Non-RSSI based energy efficient transmission power control protocol for low power indoor wireless sensor networks. [Doctoral Dissertation]. Massey University; 2016. Available from: http://hdl.handle.net/10179/8658
Rice University
2.
Duarte, Melissa.
Full-duplex Wireless: Design, Implementation and Characterization.
Degree: PhD, Engineering, 2012, Rice University
URL: http://hdl.handle.net/1911/70233
► One of the fundamental assumptions made in the design of wireless networks is that the wireless devices have to be half-duplex, i.e., they cannot simultaneously…
(more)
▼ One of the fundamental assumptions made in the design of
wireless networks is that the
wireless devices have to be half-duplex, i.e., they cannot simultaneously transmit and receive in the same frequency band. The key deterrent in implementing a full-duplex
wireless device, which can simultaneously transmit and receive in the same frequency band, is the large power differential between the self-interference from a device's own transmissions and the signal of interest coming from a distant source. In this thesis, we revisit this basic assumption and propose a full-duplex radio design. The design suppresses the self-interference signal by employing a combination of passive suppression, and active analog and digital cancellation mechanisms. The active cancellations are designed for wideband, multiple subcarrier (OFDM), and multiple antenna (MIMO)
wireless communications systems. We then implement our design as a 20 MHz MIMO OFDM system with a 2.4 GHz center frequency, suitable for Wi-Fi systems. We perform extensive over-the-air tests to characterize our implementation. Our main contributions are the following: (a) the average amount of active cancellation increases as the received self-interference power increases and as a result, the rate of a full-duplex link increases as the transmit power of communicating devices increases, (b) applying digital cancellation after analog cancellation can sometimes increase the self-interference and the effectiveness of digital cancellation in a full-duplex system will depend on the performance of the cancellation stages that precede it, (c) our full-duplex device design achieves an average of 85 dB of self-interference cancellation over a 20 MHz bandwidth at 2.4 GHz, which is the best cancellation performance reported to date, (d) our full-duplex device design achieves 30-84% higher ergodic rates than its half-duplex counterpart for received powers in the range of [-75, -60] dBm. As a result, our design is the first one to achieve Wi-Fi ranges; in comparison, no implementation to date has achieved Wi-Fi ranges. Consequently, we have conclusively demonstrated that Wi-Fi full-duplex is practically feasible and hence shown that one of the commonly made assumptions in
wireless networks is not fundamental.
Advisors/Committee Members: Sabharwal, Ashutosh (advisor).
Subjects/Keywords: Applied sciences; Wireless networks; Full-duplex wireless communication; Hardware; Electrical engineering
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APA (6th Edition):
Duarte, M. (2012). Full-duplex Wireless: Design, Implementation and Characterization. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/70233
Chicago Manual of Style (16th Edition):
Duarte, Melissa. “Full-duplex Wireless: Design, Implementation and Characterization.” 2012. Doctoral Dissertation, Rice University. Accessed December 13, 2019.
http://hdl.handle.net/1911/70233.
MLA Handbook (7th Edition):
Duarte, Melissa. “Full-duplex Wireless: Design, Implementation and Characterization.” 2012. Web. 13 Dec 2019.
Vancouver:
Duarte M. Full-duplex Wireless: Design, Implementation and Characterization. [Internet] [Doctoral dissertation]. Rice University; 2012. [cited 2019 Dec 13].
Available from: http://hdl.handle.net/1911/70233.
Council of Science Editors:
Duarte M. Full-duplex Wireless: Design, Implementation and Characterization. [Doctoral Dissertation]. Rice University; 2012. Available from: http://hdl.handle.net/1911/70233
Texas State University – San Marcos
3.
Krishnappa, Raghu.
Design and optimization of data acquisition system using wireless underground sensor networks.
Degree: MS, Engineering, 2017, Texas State University – San Marcos
URL: https://digital.library.txstate.edu/handle/10877/6944
► The growth of Wireless Underground Sensor Networks (WUSN) will lead to numerous emerging applications, such as underground pipelines, oil reservoir monitoring, intelligent agriculture, earthquake and…
(more)
▼ The growth of
Wireless Underground Sensor
Networks (WUSN) will lead to numerous emerging applications, such as underground pipelines, oil reservoir monitoring, intelligent agriculture, earthquake and landslide forecasting, border patrol, underground mine disaster prevention, and rescue. Underground environments prevent the use of most current
wireless communication and networking systems, due to its extremely high attenuation to the propogation of signals, small communication range, and high dynamics of electromagnetic (EM) waves when penetrating through soil, rock, sand, water, crude oil medium and other underground environments. The objective of this research is to address these unique and significant challenges for the realization of
wireless sensor
networks in underground data monitoring systems. Research also focuses on developing a general framework using underground
wireless sensor
networks to provide continuous monitoring of pipeline to detect water leakage.
Advisors/Committee Members: Aslan, Semih (advisor), Stern, Harold (committee member), Stephan, Karl (committee member), Koutitas, George (committee member), Asiabanpour, Bahram (committee member).
Subjects/Keywords: Wireless underground sensor network; Wireless sensor networks; Pipelines – Maintenance and repair
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APA (6th Edition):
Krishnappa, R. (2017). Design and optimization of data acquisition system using wireless underground sensor networks. (Masters Thesis). Texas State University – San Marcos. Retrieved from https://digital.library.txstate.edu/handle/10877/6944
Chicago Manual of Style (16th Edition):
Krishnappa, Raghu. “Design and optimization of data acquisition system using wireless underground sensor networks.” 2017. Masters Thesis, Texas State University – San Marcos. Accessed December 13, 2019.
https://digital.library.txstate.edu/handle/10877/6944.
MLA Handbook (7th Edition):
Krishnappa, Raghu. “Design and optimization of data acquisition system using wireless underground sensor networks.” 2017. Web. 13 Dec 2019.
Vancouver:
Krishnappa R. Design and optimization of data acquisition system using wireless underground sensor networks. [Internet] [Masters thesis]. Texas State University – San Marcos; 2017. [cited 2019 Dec 13].
Available from: https://digital.library.txstate.edu/handle/10877/6944.
Council of Science Editors:
Krishnappa R. Design and optimization of data acquisition system using wireless underground sensor networks. [Masters Thesis]. Texas State University – San Marcos; 2017. Available from: https://digital.library.txstate.edu/handle/10877/6944
Virginia Commonwealth University
4.
Jung, Changyong.
ON RELAY NODE PLACEMENT PROBLEM FOR SURVIVABLE WIRELESS SENSOR NETWORKS.
Degree: PhD, Engineering, 2013, Virginia Commonwealth University
URL: https://scholarscompass.vcu.edu/etd/570
► Wireless sensor networks are widely applied to many fields such as animal habitat monitoring, air traffic control, and health monitoring. One of the current problems…
(more)
▼ Wireless sensor
networks are widely applied to many fields such as animal habitat monitoring, air traffic control, and health monitoring. One of the current problems with
wireless sensor
networks is the ability to overcome communication failures due to hardware failure, distributing sensors in an uneven geographic area, or unexpected obstacles between sensors. One common solution to overcome this problem is to place a minimum number of relay nodes among sensors so that the communication among sensors is guaranteed. This is called Relay Node Placement Problem (RNP). This problem has been proved as NP-hard for a simple connected graph. Therefore, many algorithms have been developed based on Steiner graphs. Since RNP for a connected graph is NP-hard, the RNP for a survivable network has been conjectured as NP-hard and the algorithms for a survivable network have also been developed based on Steiner graphs. In this study, we show the new approximation bound for the survivable
wireless sensor
networks using the Steiner graphs based algorithm. We prove that the approximation bound is guaranteed in an environment where some obstacles are laid, and also propose the newly developed algorithm which places fewer relay nodes than the existing algorithms. Consequently, the main purpose of this study is to find the minimum number of relay nodes in order to meet the survivability requirements of
wireless sensor
networks.
Advisors/Committee Members: Yu Meng.
Subjects/Keywords: Wireless Sensor Networks; Relay Node Placement; Survivability.; Engineering
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APA (6th Edition):
Jung, C. (2013). ON RELAY NODE PLACEMENT PROBLEM FOR SURVIVABLE WIRELESS SENSOR NETWORKS. (Doctoral Dissertation). Virginia Commonwealth University. Retrieved from https://scholarscompass.vcu.edu/etd/570
Chicago Manual of Style (16th Edition):
Jung, Changyong. “ON RELAY NODE PLACEMENT PROBLEM FOR SURVIVABLE WIRELESS SENSOR NETWORKS.” 2013. Doctoral Dissertation, Virginia Commonwealth University. Accessed December 13, 2019.
https://scholarscompass.vcu.edu/etd/570.
MLA Handbook (7th Edition):
Jung, Changyong. “ON RELAY NODE PLACEMENT PROBLEM FOR SURVIVABLE WIRELESS SENSOR NETWORKS.” 2013. Web. 13 Dec 2019.
Vancouver:
Jung C. ON RELAY NODE PLACEMENT PROBLEM FOR SURVIVABLE WIRELESS SENSOR NETWORKS. [Internet] [Doctoral dissertation]. Virginia Commonwealth University; 2013. [cited 2019 Dec 13].
Available from: https://scholarscompass.vcu.edu/etd/570.
Council of Science Editors:
Jung C. ON RELAY NODE PLACEMENT PROBLEM FOR SURVIVABLE WIRELESS SENSOR NETWORKS. [Doctoral Dissertation]. Virginia Commonwealth University; 2013. Available from: https://scholarscompass.vcu.edu/etd/570
Rice University
5.
Middleton, Gareth B.
Efficient Resource Allocation in Multiflow Wireless Networks.
Degree: PhD, Engineering, 2011, Rice University
URL: http://hdl.handle.net/1911/70353
► We consider the problem of allocating resources in large wireless net- works in which multiple information flows must be accommodated. In particular, we seek a…
(more)
▼ We consider the problem of allocating resources in large
wireless net- works in which multiple information flows must be accommodated. In particular, we seek a method for selecting schedules, routes, and power allocations for
networks with terminals capable of user-cooperation at the signal level. To that end, we adopt a general information-theoretic communications model, in which the datarate of a
wireless link is purely a function of transmission power, pathloss and interference. We begin by studying the case of resource allocation when only point-to-point links are available. The problem is NP-hard in this case, requiring an exponentially-complex exhaustive search to guarantee an optimal solution. This is prohibitively difficult for anything but the smallest of
networks, leading us to approximate the problem using a decomposition approach. We construct the solution iteratively, developing polynomial-time algorithms to optimally allocate resources on a per-frame basis. We then update the network graph to reflect the resources consumed by the allocated frame. To manage this decomposition, we present a novel tool, termed the Network-Flow Interaction Chart. By representing the network in both space and time, our techniques trade off interference with throughput for each frame, offering considerable performance gains over schemes of similar complexity. Recognizing that our approach requires a large amount of overhead, we go on to develop a method in which it may be decentralized. We find that while the overhead is considerably lower, the limited solution space results in suboptimal solutions in a throughput sense. We conclude with a generalization of the Network-Flow Interaction Chart to address cooperative resource allocation. We represent cooperative links using "metanodes," which are made available to the allocation algorithms alongside point-to-point links and will be selected only if they offer higher throughput. The data-carrying capability of the cooperative links is modeled using Decode-and-Forward achievable rates, which are functions of transmit power and interference, and so may be incorporated directly into our framework. We demonstrate that allocations incorporating cooperation results in significant performance gains as compared to using point-to-point links alone.
Advisors/Committee Members: Aazhang, Behnaam (advisor).
Subjects/Keywords: Applied sciences; Resource allocation; Wireless networks; Cooperative communication; Routing; Electrical engineering
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APA (6th Edition):
Middleton, G. B. (2011). Efficient Resource Allocation in Multiflow Wireless Networks. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/70353
Chicago Manual of Style (16th Edition):
Middleton, Gareth B. “Efficient Resource Allocation in Multiflow Wireless Networks.” 2011. Doctoral Dissertation, Rice University. Accessed December 13, 2019.
http://hdl.handle.net/1911/70353.
MLA Handbook (7th Edition):
Middleton, Gareth B. “Efficient Resource Allocation in Multiflow Wireless Networks.” 2011. Web. 13 Dec 2019.
Vancouver:
Middleton GB. Efficient Resource Allocation in Multiflow Wireless Networks. [Internet] [Doctoral dissertation]. Rice University; 2011. [cited 2019 Dec 13].
Available from: http://hdl.handle.net/1911/70353.
Council of Science Editors:
Middleton GB. Efficient Resource Allocation in Multiflow Wireless Networks. [Doctoral Dissertation]. Rice University; 2011. Available from: http://hdl.handle.net/1911/70353
Rice University
6.
Bai, Jingwen.
Wireless Side-Channels in MIMO Full-Duplex Systems.
Degree: PhD, Engineering, 2016, Rice University
URL: http://hdl.handle.net/1911/96607
► In this thesis, we propose a new approach for enhanced interference management via wireless side-channels in advanced wireless systems such as MIMO full-duplex systems. The…
(more)
▼ In this thesis, we propose a new approach for enhanced interference management via
wireless side-channels in advanced
wireless systems such as MIMO full-duplex systems. The rise of multiple radio interfaces, such as WiFi (operating in unlicensed ISM bands) and cellular (operating in licensed bands), with near-default inclusion in smartphones, allows for a new use of the ISM bands to manage interference in cellular bands, by creating
wireless “side-channels” between mobile users. In a multi-user MIMO full-duplex system, an in-band full-duplex base station (BS) with multiple antennas communicates with multiple up- and downlink users in the same time-frequency slot. We characterize the impact of side- channels in managing interference from uplink users to downlink users in such MIMO full-duplex system.
First, we experimentally quantify the likelihood of establishing ISM side-channels between smartphones in WiFi-free areas such as highways. Next, we study a side-channel assisted two-user MIMO full-duplex sys- tem and characterize its generalized degrees-of-freedom and diversity- multiplexing tradeoff. For such a system, we show that the optimal perfor- mance is achieved by our proposed vector bin-and-cancel strategy which leverages Han-Kobayashi message splitting.
Then, we study a side-channel assisted multi-user MIMO full-duplex system from a cross-layer protocol design perspective. Our protocol design integrates automatic repeat request (ARQ) at the medium access control (MAC) layer with enhanced interference management via side-channels at the physical layer (PHY). Our proposed joint PHY-MAC protocols exploit the ARQ information offered by the MAC layer to reduce the data retransmission time and improve system goodput.
Finally, we study a multi-cell multi-user MIMO full-duplex system, where new forms of intra- and inter-cell interference appear due to the full-duplex operation. We characterize the up- and downlink ergodic achievable rates for the case of linear precoders and receivers. The rate analysis includes practical constraints such as imperfect full-duplex radio chains, channel estimation error, training overhead and pilot contamination. We show that with large antenna arrays at base-stations, the gains from full-duplex are available at the network level despite the increased interference in the full-duplex
networks. Moreover, full-duplex
networks can use fewer antennas to achieve spectral efficiency gain over the half-duplex counterparts. We also demonstrate that under realistic multi-cell MIMO full-duplex network scenarios, side-channels are effective in significantly improving the spectral efficiency of cell-edge users.
Advisors/Committee Members: Sabharwal, Ashutosh (advisor).
Subjects/Keywords: MIMO; Wireless side-channels; Full-duplex; Multi-cell networks
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APA (6th Edition):
Bai, J. (2016). Wireless Side-Channels in MIMO Full-Duplex Systems. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/96607
Chicago Manual of Style (16th Edition):
Bai, Jingwen. “Wireless Side-Channels in MIMO Full-Duplex Systems.” 2016. Doctoral Dissertation, Rice University. Accessed December 13, 2019.
http://hdl.handle.net/1911/96607.
MLA Handbook (7th Edition):
Bai, Jingwen. “Wireless Side-Channels in MIMO Full-Duplex Systems.” 2016. Web. 13 Dec 2019.
Vancouver:
Bai J. Wireless Side-Channels in MIMO Full-Duplex Systems. [Internet] [Doctoral dissertation]. Rice University; 2016. [cited 2019 Dec 13].
Available from: http://hdl.handle.net/1911/96607.
Council of Science Editors:
Bai J. Wireless Side-Channels in MIMO Full-Duplex Systems. [Doctoral Dissertation]. Rice University; 2016. Available from: http://hdl.handle.net/1911/96607
Rice University
7.
Amiri, Keyvan.
Evaluating Multihop Mobile Wireless Networks with Controllable Node Sparsity or Density.
Degree: PhD, Engineering, 2015, Rice University
URL: http://hdl.handle.net/1911/87695
► Simulation is the most widely used tool for evaluating the performance of multihop mobile wireless networks, yet such simulation has so far been limited due…
(more)
▼ Simulation is the most widely used tool for evaluating the performance of multihop mobile
wireless networks, yet such simulation has so far been limited due to the lack of sufficient
wireless mobility models for creating a wide range of different types of network scenarios of mobile nodes moving about for use in protocol simulation. For example, the very commonly used Random Waypoint mobility model can only effectively be used in scenarios with relatively high node density, as attempting to generate sparser scenarios (e.g., trying the same number of nodes in larger and larger spaces) results in scenarios in which the network is frequently or always partitioned, with no possible multihop
wireless path between many different pairs of nodes.
In this thesis, I present the design and evaluation of the Random Controlled Sparse (RCS) mobility model, a new dynamic, tunable mobility model that can be controlled to generate a wide range of mobile scenarios with varying levels of node sparsity or density while avoiding network partitions. The model requires only a small set of parameters to define the desired behavior of the scenarios being generated. In generating a scenario, RCS itself internally operates as a separate discrete event simulator, utilizing highly efficient graph and computational geometry algorithms to control the desired sparse behavior and manage the constraints between the motions of different nodes. To further improve the performance and scalability of the model, I have also parallelized certain key parts of the scenario generation in the model.
To show the performance of the model in generating scenarios, I have evaluated the running time of the model across wide range of number of nodes and node densities. I also present an evaluation of the scenarios generated, in terms of metrics such as the average number of neighbors of a node and the average minimum possible path length (hop count) existing between each pair of nodes, demonstrating the range of scenarios that RCS is able to produce. To show the usefulness of the model in revealing protocol behavior, I show the performance of DSDV, a common multihop
wireless ad hoc network routing protocol, across a wide range of sparse and dense network scenarios. These results demonstrate that different degrees of node sparsity or density sometimes have surprising effects on protocol performance. Simulations such as these, revealing these types of results, have not generally been possible before due to the lack of suitable mobility models.
Finally, to more fully show the use of the RCS model in evaluating real protocols, I present the design and evaluation of LAMP, the Local-Approximation Multicast Protocol, a new on-demand multicast routing protocol I have designed for mobile
wireless ad hoc
networks that delivers high performance in both sparse as well as dense scenarios. LAMP maintains high performance by utilizing link-layer unicast transmissions, based on a new algorithm in which each node computes a local approximation of the globally optimal multicast…
Advisors/Committee Members: Johnson, David B. (advisor), Baraniuk, Richard G. (committee member), Jermaine, Christopher (committee member).
Subjects/Keywords: Network Simulation; Wireless Mobile Ad hoc Networks; Performance Evaluation; Mobility Model; Multicast Protocol; Ad Hoc Networks; Anticipatory Forwarding
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APA (6th Edition):
Amiri, K. (2015). Evaluating Multihop Mobile Wireless Networks with Controllable Node Sparsity or Density. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/87695
Chicago Manual of Style (16th Edition):
Amiri, Keyvan. “Evaluating Multihop Mobile Wireless Networks with Controllable Node Sparsity or Density.” 2015. Doctoral Dissertation, Rice University. Accessed December 13, 2019.
http://hdl.handle.net/1911/87695.
MLA Handbook (7th Edition):
Amiri, Keyvan. “Evaluating Multihop Mobile Wireless Networks with Controllable Node Sparsity or Density.” 2015. Web. 13 Dec 2019.
Vancouver:
Amiri K. Evaluating Multihop Mobile Wireless Networks with Controllable Node Sparsity or Density. [Internet] [Doctoral dissertation]. Rice University; 2015. [cited 2019 Dec 13].
Available from: http://hdl.handle.net/1911/87695.
Council of Science Editors:
Amiri K. Evaluating Multihop Mobile Wireless Networks with Controllable Node Sparsity or Density. [Doctoral Dissertation]. Rice University; 2015. Available from: http://hdl.handle.net/1911/87695
8.
Vishwakarma Dharmistha Doodhnath.
Development, simulation & implementation of new
strategies for power control and routing protocols for wireless
Ad-hoc network; -.
Degree: Engineering, 2011, Maharaja Sayajirao University of Baroda
URL: http://shodhganga.inflibnet.ac.in/handle/10603/8919
► Route construction should be done with a minimum of power usage and bandwidth consumption. An intelligent routing strategy is required to efficiently use the limited…
(more)
▼ Route construction should be done with a minimum of
power usage and bandwidth consumption. An intelligent routing
strategy is required to efficiently use the limited resources while
at the same time being adaptable to the changing network conditions
such as: network size, traffic density and network partitioning.
Due to nodes mobility, the efficiency of a dynamic ad hoc routing
protocol depends highly on updating speed of network topology
changes. To achieve continuous updated routing tables, the nodes
periodically broadcast short Hello messages to their neighbors.
AODV is a reactive protocol it uses these periodic HELLO messages
to inform the neighbors that the link is still alive. The HELLO
messages will never be forwarded because they are broadcasted with
Time To Live (TTL) = 1. When a node receives a HELLO message it
refreshes the corresponding lifetime of the neighbor information in
the routing table. The standard protocols use fixed specified
values for the parameters. Main objective of the research work is
to explore possibility and effect of changing parameter values to
improve the performance of the routing protocol for power control.
Soft computing differs from conventional (hard) computing in that,
unlike hard computing, it is tolerant of imprecision, uncertainty,
partial truth, and approximation. In effect, the role model for
soft computing is the human mind. New strategies are proposed for
routing protocol and power control based on the controlling Hello
Interval parameter of AODV routing protocol. The adaptive value of
Hello interval is decided by soft computing techniques viz. Fuzzy
Inference System, Artificial Neural Network, Adaptive Neuro Fuzzy
Inference System and Genetic algorithm. Effect of application of GA
for ANN training has been studied. Proposed strategies employing
soft computing are simulated using development support tools such
as: MATLAB/SIMULINK/TRUETIME and NS2/Qualnet etc. Hardware
Implementation has done on XCV5LX110T FPGA evaluation platform
using Xilinx ISE Design 13.1.
Bibliography p.194-214, Appendix
p.215-232
Advisors/Committee Members: Shah, Satish K.
Subjects/Keywords: Wireless Ad-Hoc Networks; Electrical Engineering; Routing Protocols; Soft Computing; Artificial Neural Network
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Manager
APA (6th Edition):
Doodhnath, V. D. (2011). Development, simulation & implementation of new
strategies for power control and routing protocols for wireless
Ad-hoc network; -. (Thesis). Maharaja Sayajirao University of Baroda. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/8919
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):
Doodhnath, Vishwakarma Dharmistha. “Development, simulation & implementation of new
strategies for power control and routing protocols for wireless
Ad-hoc network; -.” 2011. Thesis, Maharaja Sayajirao University of Baroda. Accessed December 13, 2019.
http://shodhganga.inflibnet.ac.in/handle/10603/8919.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Doodhnath, Vishwakarma Dharmistha. “Development, simulation & implementation of new
strategies for power control and routing protocols for wireless
Ad-hoc network; -.” 2011. Web. 13 Dec 2019.
Vancouver:
Doodhnath VD. Development, simulation & implementation of new
strategies for power control and routing protocols for wireless
Ad-hoc network; -. [Internet] [Thesis]. Maharaja Sayajirao University of Baroda; 2011. [cited 2019 Dec 13].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/8919.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Doodhnath VD. Development, simulation & implementation of new
strategies for power control and routing protocols for wireless
Ad-hoc network; -. [Thesis]. Maharaja Sayajirao University of Baroda; 2011. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/8919
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
9.
Santacruz, Pedro.
Beyond Interference Avoidance: Distributed Sun-network Scheduling in Wireless Networks with Local Views.
Degree: PhD, Engineering, 2013, Rice University
URL: http://hdl.handle.net/1911/72036
► In most wireless networks, nodes have only limited local information about the state of the network, which includes connectivity and channel state information. With limited…
(more)
▼ In most
wireless networks, nodes have only limited local information about the state of the network, which includes connectivity and channel state information. With limited local information about the network, each node’s knowledge is mismatched; therefore, they must make distributed decisions. In this thesis, we pose the following question - if every node has network state information only about a small neighborhood, how and when should nodes choose to transmit? While link scheduling answers the above question for point-to-point physical layers which are designed for an interference-avoidance paradigm, we look for answers in cases when interference can be embraced by advanced code design, as suggested by results in network information theory.
To make progress on this challenging problem, we propose two constructive distributed algorithms, one conservative and one aggressive, which achieve rates higher than link scheduling based on interference avoidance, especially if each node knows more than one hop of network state information. Both algorithms schedule sub-
networks such that each sub-network can employ advanced interference-embracing coding schemes to achieve higher rates. Our innovation is in the identification, selection and scheduling of sub-
networks, especially when sub-
networks are larger than a single link.
Using normalized sum-rate as the metric of network performance, we prove that the proposed conservative sub-network scheduling algorithm is guaranteed to have performance greater than or equal to pure coloring-based link scheduling. In addition, the proposed aggressive sub-network scheduling algorithm is shown, through simulations, to achieve better normalized sum-rate than the conservative algorithm for several network classes. Our results highlight the advantages of extending the design space of possible scheduling strategies to include those that leverage local network information.
Advisors/Committee Members: Sabharwal, Ashutosh (advisor), Aazhang, Behnaam (committee member), Knightly, Edward W. (committee member), Hicks, Illya V. (committee member).
Subjects/Keywords: Wireless communication; Wireless networks; Distributed scheduling; Local views
…Chapter 1
Introduction
The shared nature of wireless communication networks results in the… …be the near de-facto strategy in wireless
networks, it has been known for some time that… …performance.
Chapter 3
Related Work
Interference management in wireless networks has been widely… …wireless networks.
3.1
Interference Avoidance: Link Scheduling
In the seminal work by… …problem of wired networks with linear network coding are applied to the
wireless problem. The…
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APA (6th Edition):
Santacruz, P. (2013). Beyond Interference Avoidance: Distributed Sun-network Scheduling in Wireless Networks with Local Views. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/72036
Chicago Manual of Style (16th Edition):
Santacruz, Pedro. “Beyond Interference Avoidance: Distributed Sun-network Scheduling in Wireless Networks with Local Views.” 2013. Doctoral Dissertation, Rice University. Accessed December 13, 2019.
http://hdl.handle.net/1911/72036.
MLA Handbook (7th Edition):
Santacruz, Pedro. “Beyond Interference Avoidance: Distributed Sun-network Scheduling in Wireless Networks with Local Views.” 2013. Web. 13 Dec 2019.
Vancouver:
Santacruz P. Beyond Interference Avoidance: Distributed Sun-network Scheduling in Wireless Networks with Local Views. [Internet] [Doctoral dissertation]. Rice University; 2013. [cited 2019 Dec 13].
Available from: http://hdl.handle.net/1911/72036.
Council of Science Editors:
Santacruz P. Beyond Interference Avoidance: Distributed Sun-network Scheduling in Wireless Networks with Local Views. [Doctoral Dissertation]. Rice University; 2013. Available from: http://hdl.handle.net/1911/72036
10.
Sharma, Kamal Kumar.
Traffic contention assessment and control for improvement
of QoS in heterogeneous wireless sensor networks; -.
Degree: Engineering, 2009, Punjab Technical University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/8869
Subjects/Keywords: Wireless Sensor Networks; Network Energy Efficiency; Network Routing
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APA (6th Edition):
Sharma, K. K. (2009). Traffic contention assessment and control for improvement
of QoS in heterogeneous wireless sensor networks; -. (Thesis). Punjab Technical University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/8869
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):
Sharma, Kamal Kumar. “Traffic contention assessment and control for improvement
of QoS in heterogeneous wireless sensor networks; -.” 2009. Thesis, Punjab Technical University. Accessed December 13, 2019.
http://shodhganga.inflibnet.ac.in/handle/10603/8869.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sharma, Kamal Kumar. “Traffic contention assessment and control for improvement
of QoS in heterogeneous wireless sensor networks; -.” 2009. Web. 13 Dec 2019.
Vancouver:
Sharma KK. Traffic contention assessment and control for improvement
of QoS in heterogeneous wireless sensor networks; -. [Internet] [Thesis]. Punjab Technical University; 2009. [cited 2019 Dec 13].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/8869.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sharma KK. Traffic contention assessment and control for improvement
of QoS in heterogeneous wireless sensor networks; -. [Thesis]. Punjab Technical University; 2009. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/8869
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Rice University
11.
Ionita, Corina I.
Practical Integer-Forcing Linear Receivers: from OFDM Signal Architecture to WARP Experimental Validation.
Degree: PhD, Engineering, 2018, Rice University
URL: http://hdl.handle.net/1911/105631
► This thesis presents the first practical implementation of the integer-forcing (IF) linear receiver. Instead of treating interference as noise, the IF linear receiver decodes linear…
(more)
▼ This thesis presents the first practical implementation of the integer-forcing (IF) linear receiver. Instead of treating interference as noise, the IF linear receiver decodes linear combinations of all transmitted signals. In theory, this promising approach has been shown to improve the overall performance of
wireless networks by using the interference in a constructive way. However, in practice, little is known about the actual performance of IF linear receivers, because they pose significant practical challenges. In this work, I introduce solutions to the practical challenges of IF linear receivers and I implement and test these solutions in an experimental environment.
First, I identify the transmitter's coded and uncoded signal architectures which enable the use of IF linear receivers in practical orthogonal frequency-division multiplexing (OFDM) systems. Also, I develop the receiver's signal architecture and derive the corresponding probability density functions of the received linear combinations of messages.
Secondly, I use the
Wireless Open Access Research Platform (WARP) and the WARPlab 802.11 OFDM framework to build the IF linear receiver for a 2x2 Multiple Input Multiple Output (MIMO)
wireless network. This work validates in a practical
wireless network the theoretical symbol error rate and code error rate improvements of the IF linear receiver. For the uncoded framework, I show that the IF linear receiver performs arbitrarily close to the optimal maximum likelihood (ML) receiver and always better than conventional linear receivers, (the zero-forcing (ZF) and the minimum-mean square error (MMSE) linear receivers). Furthermore, when combined with typical LDPC codes, the performance gap between the IF and ZF linear receiver increases drastically.
Third, I also propose new ways of reducing the complexity of the IF linear receiver. This complexity reduction introduces some performance loss. However, I show through experimental results that, even with this decrease in performance the IF linear receiver still outperforms conventional ones.
Together, these contributions demonstrate that IF linear receivers can be indeed applied in practical Wi-Fi
networks and can lead to significant performance improvements.
Advisors/Committee Members: Aazhang, Behnaam (advisor).
Subjects/Keywords: Integer-forcing linear receivers; WARP; WARPlab; MMSE linear receivers; MIMO; wireless networks; experimental results; signal architecture
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APA (6th Edition):
Ionita, C. I. (2018). Practical Integer-Forcing Linear Receivers: from OFDM Signal Architecture to WARP Experimental Validation. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/105631
Chicago Manual of Style (16th Edition):
Ionita, Corina I. “Practical Integer-Forcing Linear Receivers: from OFDM Signal Architecture to WARP Experimental Validation.” 2018. Doctoral Dissertation, Rice University. Accessed December 13, 2019.
http://hdl.handle.net/1911/105631.
MLA Handbook (7th Edition):
Ionita, Corina I. “Practical Integer-Forcing Linear Receivers: from OFDM Signal Architecture to WARP Experimental Validation.” 2018. Web. 13 Dec 2019.
Vancouver:
Ionita CI. Practical Integer-Forcing Linear Receivers: from OFDM Signal Architecture to WARP Experimental Validation. [Internet] [Doctoral dissertation]. Rice University; 2018. [cited 2019 Dec 13].
Available from: http://hdl.handle.net/1911/105631.
Council of Science Editors:
Ionita CI. Practical Integer-Forcing Linear Receivers: from OFDM Signal Architecture to WARP Experimental Validation. [Doctoral Dissertation]. Rice University; 2018. Available from: http://hdl.handle.net/1911/105631
12.
Ramirez Dominguez, David Alejandro.
Throughput Maximizing and Service Provisioning Strategies for Millimeter Wave Networks.
Degree: PhD, Engineering, 2017, Rice University
URL: http://hdl.handle.net/1911/96018
► Migrating wireless communications to millimeter wave (mmWave) frequencies can satiate the growing demand for higher throughput and delay sensitive service provision. Due to high path…
(more)
▼ Migrating
wireless communications to millimeter wave (mmWave) frequencies can satiate the growing demand for higher throughput and delay sensitive service provision. Due to high path loss and poor penetration, mmWave communications are challenged by limited coverage and blockage. Dense access point (AP) deployment and beamforming can enable mmWave
networks to increase coverage and combat blockage. Greater AP density gives users diversity in AP selection, and thus a user can probe multiple APs to opportunistically transmit over the \emph{best} channel. Yet, the opportunity to transmit to a previously probed AP may be lost due to inherent network properties (e.g. blockage, deafness, or decentralized scheduling), and the overhead delay and cost of probing more APs may also be detrimental to the search itself.
We analyze the impact of AP diversity, beamforming, and overhead in opportunistic mmWave
networks in terms of throughput and service provision capabilities. Decentralized opportunistic solutions are presented within a model that accounts for overhead delay and overhead bit cost. We assume no a priori knowledge of channel conditions, thus a deterministically optimal solution is unattainable in non-trivial scenarios. Stochastically optimal strategies are proposed and genie-aided solutions are presented as tight upper bounds. Ultimately, we present a model which includes the inherent properties of mmWave
networks and obtain opportunistically optimal strategies for throughput and service provisioning.
Conditions under which throughput maximization is a sub-martingale are presented, thus the problem is approached as a finite horizon stopping problem with unreliable recall. The optimal opportunistic strategy is a set of a priori computable thresholds. Bounds on average overhead, average delay, and average performance bound of the stopping strategy are presented. The throughput performance of optimal opportunistic strategies and the impact of imperfect network measurements are evaluated via simulations.
Service provision maximization is considered under strict delay or average delay constraints. Both constraints lead to unique non-linear knapsack problems, yet reformulations into linear optimization problems are obtained by expanding the variable space. Optimal probing orders, for specific network conditions, are presented and the intuition of the optimal orders is leveraged for general network conditions. Opportunistic strategies are presented and evaluated via simulations against computationally intense stochastic programming solutions and impractical genie-aided tight upper bounds.
Advisors/Committee Members: Aazhang, Behnaam (advisor).
Subjects/Keywords: mmWave; wireless; wireless networks; wireless communications; optimization; scheduling; services; millimeter wave; stopping problems; knapsack problem
…resources and the stochastic nature of channels make service provision over
wireless networks a… …challenging task. Future wireless networks will be required to
meet stricter delay constraints… …wireless networks [1, 2, 3]. Next generation
wireless networks are tasked with… …wireless networks with non-negligible overhead. Service
maximization refers to maximizing a… …2
Networks have been developed with the goal of seamless service provision, but
limited…
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APA (6th Edition):
Ramirez Dominguez, D. A. (2017). Throughput Maximizing and Service Provisioning Strategies for Millimeter Wave Networks. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/96018
Chicago Manual of Style (16th Edition):
Ramirez Dominguez, David Alejandro. “Throughput Maximizing and Service Provisioning Strategies for Millimeter Wave Networks.” 2017. Doctoral Dissertation, Rice University. Accessed December 13, 2019.
http://hdl.handle.net/1911/96018.
MLA Handbook (7th Edition):
Ramirez Dominguez, David Alejandro. “Throughput Maximizing and Service Provisioning Strategies for Millimeter Wave Networks.” 2017. Web. 13 Dec 2019.
Vancouver:
Ramirez Dominguez DA. Throughput Maximizing and Service Provisioning Strategies for Millimeter Wave Networks. [Internet] [Doctoral dissertation]. Rice University; 2017. [cited 2019 Dec 13].
Available from: http://hdl.handle.net/1911/96018.
Council of Science Editors:
Ramirez Dominguez DA. Throughput Maximizing and Service Provisioning Strategies for Millimeter Wave Networks. [Doctoral Dissertation]. Rice University; 2017. Available from: http://hdl.handle.net/1911/96018
13.
Ramirez Dominguez, David.
Optimal Routing and Power Allocation for Wireless Networks with Imperfect Full-Duplex Nodes.
Degree: MS, Engineering, 2013, Rice University
URL: http://hdl.handle.net/1911/71682
► We study a wireless full-duplex network with imperfect interference cancellation and solve the routing and power allocation problem in this network. We use a model…
(more)
▼ We study a
wireless full-duplex network with imperfect interference cancellation and solve the routing and power allocation problem in this network. We use a model that focuses on the effects of full-duplex by including residual self-interference and one hop interference while other interfering signals are considered negligible in comparison. We first solve the optimal power allocation for a fixed route. We then propose a priority-first search algorithm to find the joint route and power allocation to maximize throughput. The algorithm proposed has a non decomposable priority metric, but is efficiently evaluated by our solution for a fixed route. We analyze the performance of our solution in a more realistic model by deriving bounds between optimal solutions in both models. Through simulations we show that, even with imperfect interference cancellation, full-duplex achieves a higher throughput than half-duplex or direct transmission for moderate transmission power.
Advisors/Committee Members: Aazhang, Behnaam (advisor), Knightly, Edward W. (committee member), Sabharwal, Ashutosh (committee member).
Subjects/Keywords: Routing; Power allocation; Resource allocation; Optimization; Full-duplex; Wireless networks
…duplex
operation in wireless networks and conduct research in models mostly without… …a wireless network.
Efficiently allocating network resources, such as power, can reduce… …networks, which have the ability to simultaneously transmit and receive over the same
frequency… …Full-duplex networks were thought to be feasible only in wired networks.
Through interference… …cancellation techniques authors in [12–15] have shown wireless full-duplex is feasible, but…
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APA (6th Edition):
Ramirez Dominguez, D. (2013). Optimal Routing and Power Allocation for Wireless Networks with Imperfect Full-Duplex Nodes. (Masters Thesis). Rice University. Retrieved from http://hdl.handle.net/1911/71682
Chicago Manual of Style (16th Edition):
Ramirez Dominguez, David. “Optimal Routing and Power Allocation for Wireless Networks with Imperfect Full-Duplex Nodes.” 2013. Masters Thesis, Rice University. Accessed December 13, 2019.
http://hdl.handle.net/1911/71682.
MLA Handbook (7th Edition):
Ramirez Dominguez, David. “Optimal Routing and Power Allocation for Wireless Networks with Imperfect Full-Duplex Nodes.” 2013. Web. 13 Dec 2019.
Vancouver:
Ramirez Dominguez D. Optimal Routing and Power Allocation for Wireless Networks with Imperfect Full-Duplex Nodes. [Internet] [Masters thesis]. Rice University; 2013. [cited 2019 Dec 13].
Available from: http://hdl.handle.net/1911/71682.
Council of Science Editors:
Ramirez Dominguez D. Optimal Routing and Power Allocation for Wireless Networks with Imperfect Full-Duplex Nodes. [Masters Thesis]. Rice University; 2013. Available from: http://hdl.handle.net/1911/71682
14.
Xiao, Wei-Cheng.
Physical Implementation of Synchronous Duty-Cycling MAC Protocols: Experiences and Evaluation.
Degree: MS, Engineering, 2013, Rice University
URL: http://hdl.handle.net/1911/71703
► Energy consumption and network latency are important issues in wireless sensor networks. The mechanism duty cycling is generally used in wireless sensor networks for avoiding…
(more)
▼ Energy consumption and network latency are important issues in
wireless sensor
networks. The mechanism duty cycling is generally used in
wireless sensor
networks for avoiding energy consumption due to idle listening. Duty cycling, however, also introduces additional latency in communication among sensors. Some protocols have been proposed to work in
wireless sensor
networks with duty cycling, such as S-MAC and DW-MAC. Those protocols also tried to make efficient channel utilization and to mitigate the chance of packet collision and the network latency increase resulting from collision. DW-MAC was also designed to tolerate bursty and high traffic loads without increasing energy consumption, by spreading packet transmission and node wakeup times during a cycle.
Some performance comparison between S-MAC and DW-MAC has been done in previous work; however, this comparison was performed in the ns-2 simulator only. In the real world, there are further issues not considered or discussed in the simulation, and some of those issues contribute significant influences to the MAC protocol performance. In this work, I implemented both S-MAC and DW-MAC physically on MICAz sensor motes and compared their performance through experiments. Through my implementation, experiments, and performance evaluation, hardware properties and issues that were not addressed in the previous work are presented, and their impacts on the performance are shown and discussed. I also simulated S-MAC and DW-MAC on ns-2 to give a mutual validation of the experimental results and my interpretation of the results. The experiences of physical implementations presented in this work can contribute new information and insights for helping in future MAC protocol design and implementation in
wireless sensor
networks.
Advisors/Committee Members: Johnson, David B. (advisor), Knightly, Edward W. (committee member), Ng, T. S. Eugene (committee member).
Subjects/Keywords: Wireless sensor networks; Duty cycle; MAC; Synchronous; TinyOS; DW-MAC
…Wireless Sensor Networks
Wireless sensor networks bring environment monitoring into a new field… …The significance of the role of wireless sensor networks is increasing. Wireless sensor… …wireless sensor networks can be classified into two categories:
synchronous and asynchronous. In… …MAC.
1.4
Timing
Accurate timing is important in duty-cycling wireless sensor networks… …in future MAC protocol design and
implementation in wireless sensor networks.
8
1.6…
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APA (6th Edition):
Xiao, W. (2013). Physical Implementation of Synchronous Duty-Cycling MAC Protocols: Experiences and Evaluation. (Masters Thesis). Rice University. Retrieved from http://hdl.handle.net/1911/71703
Chicago Manual of Style (16th Edition):
Xiao, Wei-Cheng. “Physical Implementation of Synchronous Duty-Cycling MAC Protocols: Experiences and Evaluation.” 2013. Masters Thesis, Rice University. Accessed December 13, 2019.
http://hdl.handle.net/1911/71703.
MLA Handbook (7th Edition):
Xiao, Wei-Cheng. “Physical Implementation of Synchronous Duty-Cycling MAC Protocols: Experiences and Evaluation.” 2013. Web. 13 Dec 2019.
Vancouver:
Xiao W. Physical Implementation of Synchronous Duty-Cycling MAC Protocols: Experiences and Evaluation. [Internet] [Masters thesis]. Rice University; 2013. [cited 2019 Dec 13].
Available from: http://hdl.handle.net/1911/71703.
Council of Science Editors:
Xiao W. Physical Implementation of Synchronous Duty-Cycling MAC Protocols: Experiences and Evaluation. [Masters Thesis]. Rice University; 2013. Available from: http://hdl.handle.net/1911/71703
Rice University
15.
KeshavarzHaddad, Alireza.
On the capacity of multihop wireless networks: Fundamental limitations and efficient algorithms.
Degree: PhD, Engineering, 2007, Rice University
URL: http://hdl.handle.net/1911/103648
► Wireless networks are rapidly becoming a major component of the modern communications infrastructure competing with wireline networking. The and of this thesis is to study…
(more)
▼ Wireless networks are rapidly becoming a major component of the modern communications infrastructure competing with wireline networking. The and of this thesis is to study the capacity, fundamental limitations, and the throughput of a number of protocols in multihop
wireless networks. To this end, we introduce novel frameworks and powerful tools for analyzing throughput and the effect of various network protocols. In the first part of the thesis, we study broadcast in
wireless networks in several complementary directions. We start by proposing three novel broadcast schemes for ad hoc
networks which combine low overhead with robustness and are provably efficient. Next, we study the dynamics of broadcast flooding under a realistic MAC model in large
wireless networks. We find conditions on survivability and coverage of flooding, and prove that flooding disseminates the information in almost constant speed. Then, we introduce and compute the broadcast capacity for multihop
wireless networks. We show that the broadcast capacity is proportional to the
wireless channel bandwidth. Moreover, we demonstrate that only the broadcasts schemes with efficient backbone can achieve a throughput close to the broadcast capacity. By applying these results, we are able to analytically evaluate the throughput and the effect of broadcast applications in arbitrary
wireless networks. In the second part of the thesis, we generalize our study from broadcast to unicast and multicast in
wireless networks. We introduce novel analytical tools for analyzing the capacity of arbitrary
wireless networks. We provide some tight and sensitive bounds on the network capacity for unicast and nnilticast applications which depend on topology and traffic pattern of the network. Furthermore, we add another dimension to our work by allowing network coding among the nodes. We investigate the benefit of network coding for some popular scenarios in
wireless networks, and demonstrate that the network coding gain is limited by a constant factor. We identify
wireless channel interference, network topology, and traffic pattern as the determining parameters on the capacity of
wireless networks. Finally, we discuss how the relevant results of this thesis can be used for design and development of
wireless networks in some particular network scenarios.
Advisors/Committee Members: Riedi, Rudolf H. (advisor).
Subjects/Keywords: Electrical engineering; Computer science; Applied sciences; Broadcast schemes; Multihop wireless networks; Network capacity
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APA (6th Edition):
KeshavarzHaddad, A. (2007). On the capacity of multihop wireless networks: Fundamental limitations and efficient algorithms. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/103648
Chicago Manual of Style (16th Edition):
KeshavarzHaddad, Alireza. “On the capacity of multihop wireless networks: Fundamental limitations and efficient algorithms.” 2007. Doctoral Dissertation, Rice University. Accessed December 13, 2019.
http://hdl.handle.net/1911/103648.
MLA Handbook (7th Edition):
KeshavarzHaddad, Alireza. “On the capacity of multihop wireless networks: Fundamental limitations and efficient algorithms.” 2007. Web. 13 Dec 2019.
Vancouver:
KeshavarzHaddad A. On the capacity of multihop wireless networks: Fundamental limitations and efficient algorithms. [Internet] [Doctoral dissertation]. Rice University; 2007. [cited 2019 Dec 13].
Available from: http://hdl.handle.net/1911/103648.
Council of Science Editors:
KeshavarzHaddad A. On the capacity of multihop wireless networks: Fundamental limitations and efficient algorithms. [Doctoral Dissertation]. Rice University; 2007. Available from: http://hdl.handle.net/1911/103648
16.
Magistretti, Eugenio.
Coordination and Interference in 802.11 Networks: Inference, Analysis and Mitigation.
Degree: PhD, Engineering, 2013, Rice University
URL: http://hdl.handle.net/1911/71994
► In the last decade, 802.11 wireless devices data-rates have increased by three orders of magnitude, while communications experiencing low throughput are still largely present. Such…
(more)
▼ In the last decade, 802.11
wireless devices data-rates have increased by three orders of magnitude, while communications experiencing low throughput are still largely present. Such throughput loss is a fundamental problem of
wireless networking that is difficult to diagnose and amend. My research addresses two key causes of throughput loss: MAC layer protocol overhead and destructive link interference. First, I design WiFi-Nano reducing the channel access overhead by an order of magnitude leveraging an innovative speculative technique to transmit preambles. This new concept is based on simultaneous preamble transmission and detection via a self-interference cancellation design, and paves the way to the realization of the collision detection paradigm in
wireless networks. Next, I propose 802.11ec (Encoded Control), the first 802.11-based protocol that eliminates the overhead of control packets. Instead, 802.11ec coordinates node transmissions via a set of predefined pseudo-noise codewords, resulting in the dramatic increase of throughput and communication robustness. Finally, I design MIDAS, a model-driven network management tool that alleviates low throughput
wireless links identifying key corrective actions. MIDAS' key contribution is to reveal the fundamental role of node transmission coordination in characterizing destructive interference. I implement WiFi-Nano, 802.11ec, and MIDAS using a combination of WARP FPGA-based radio boards, custom emulation platforms, and network simulators. The results obtained show that WiFi-Nano increases the network throughput by up to 100%, 802.11ec improves network access fairness by up to 90%, and MIDAS identifies corrective actions with a prediction error as low as 20%.
Advisors/Committee Members: Knightly, Edward W. (advisor), Gurewitz, Omer (advisor), Johnson, David B. (committee member), Sabharwal, Ashutosh (committee member).
Subjects/Keywords: Wireless local area networks; 802.11; Signal correlation; Channel access; Collision avoidance; Slot duration; Interference; Coordination; Inference; Wireless networks
…177
Chapter 1
Introduction
The presence of wireless networks in people’s daily lives is… …802.11 has emerged as a major enabling technology of high-speed
wireless networks, by providing… …problem of
wireless networks, whose origin is often hard to determine. In this thesis, I focus… …of the actual protocol enhancements implemented, the management of
802.11 wireless networks… …thus cause
of link under-performance. In 802.11 networks, barring perfectly symmetric link…
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APA (6th Edition):
Magistretti, E. (2013). Coordination and Interference in 802.11 Networks: Inference, Analysis and Mitigation. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/71994
Chicago Manual of Style (16th Edition):
Magistretti, Eugenio. “Coordination and Interference in 802.11 Networks: Inference, Analysis and Mitigation.” 2013. Doctoral Dissertation, Rice University. Accessed December 13, 2019.
http://hdl.handle.net/1911/71994.
MLA Handbook (7th Edition):
Magistretti, Eugenio. “Coordination and Interference in 802.11 Networks: Inference, Analysis and Mitigation.” 2013. Web. 13 Dec 2019.
Vancouver:
Magistretti E. Coordination and Interference in 802.11 Networks: Inference, Analysis and Mitigation. [Internet] [Doctoral dissertation]. Rice University; 2013. [cited 2019 Dec 13].
Available from: http://hdl.handle.net/1911/71994.
Council of Science Editors:
Magistretti E. Coordination and Interference in 802.11 Networks: Inference, Analysis and Mitigation. [Doctoral Dissertation]. Rice University; 2013. Available from: http://hdl.handle.net/1911/71994
17.
Miskovic, Stanislav.
Design and Evaluation of Primitives for Passive Link Assessment and Route Selection in Static Wireless Networks.
Degree: PhD, Engineering, 2012, Rice University
URL: http://hdl.handle.net/1911/64651
► Communication in wireless networks elementally comprises of packet exchanges over individual wireless links and routes formed by these links. To this end, two problems are…
(more)
▼ Communication in
wireless networks elementally comprises of packet exchanges over individual
wireless links and routes formed by these links. To this end, two problems are fundamental: assessment of link quality and identification of the least-cost (optimal) routes. However, little is known about achieving these goals without incurring additional overhead to IEEE 802.11
networks. In this thesis, I design and experimentally evaluate two frameworks that enable individual 802.11 nodes to characterize their
wireless links and routes by employing only local and passively collected information.
First, I enable 802.11 nodes to assess their links by characterizing packet delivery failures and failure causes. The key problem is that nodes cannot individually observe many factors that affect the packet delivery at both ends of their links and in both directions of 802.11 communication. To this end, instead of relying on the assistance of other nodes, I design the first practical framework that extrapolates the missing information locally from the nodes' overhearing, the observable causal relationships of 802.11 operation and characterization of the corrupted and undecodable packets. The proposed framework employs only packet-level information generally reported by commodity 802.11
wireless cards.
Next, I design and evaluate routing primitives that enable individual nodes to suppress their poor route selections. I refer to a route selection as poor whenever the employed routing protocol fails to establish the existing least-cost path according to an employed routing metric. This thesis shows that an entire family of the state-of-the art on-demand distance-vector routing protocols, including the standards-proposed protocol for IEEE 802.11s mesh
networks, suffers from frequent and long-term poor selections having arbitrary path costs. Consequently, such selections generally induce severe throughput degradations for network users. To address this problem, I design mechanisms that identify optimal paths locally by employing only the information readily available to the affected nodes. The proposed mechanisms largely suppress occurrence of inferior routes. Even when such routes are selected their durations are reduced by several orders of magnitude, often to sub-second time scales.
My work has implications on several key areas of
wireless networking: It removes systematic failures from
wireless routing and serves as a source of information for a wide range of protocols including the protocols for network management and diagnostics.
Advisors/Committee Members: Knightly, Edward W. (advisor), Johnson, David B. (committee member), Sabharwal, Ashutosh (committee member).
Subjects/Keywords: Wireless networks; Wireless routing; Link assessment; Protocol design; System analysis; Local inference
…information. . . . . . . . .
99
1
Chapter 1
Introduction
Wireless networks based on IEEE 802.11… …wireless links, and suppress selection of non-least-cost paths
in IEEE 802.11 networks.
Effective… …paths by ranking path costs reported in previous
route discoveries. Despite wireless networks… …research.
9
Chapter 2
PaL: A System for Passive and Local Link
Assessment in Wireless Networks… …2.1
Introduction
Communication in wireless networks elementally comprises of packet…
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APA (6th Edition):
Miskovic, S. (2012). Design and Evaluation of Primitives for Passive Link Assessment and Route Selection in Static Wireless Networks. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/64651
Chicago Manual of Style (16th Edition):
Miskovic, Stanislav. “Design and Evaluation of Primitives for Passive Link Assessment and Route Selection in Static Wireless Networks.” 2012. Doctoral Dissertation, Rice University. Accessed December 13, 2019.
http://hdl.handle.net/1911/64651.
MLA Handbook (7th Edition):
Miskovic, Stanislav. “Design and Evaluation of Primitives for Passive Link Assessment and Route Selection in Static Wireless Networks.” 2012. Web. 13 Dec 2019.
Vancouver:
Miskovic S. Design and Evaluation of Primitives for Passive Link Assessment and Route Selection in Static Wireless Networks. [Internet] [Doctoral dissertation]. Rice University; 2012. [cited 2019 Dec 13].
Available from: http://hdl.handle.net/1911/64651.
Council of Science Editors:
Miskovic S. Design and Evaluation of Primitives for Passive Link Assessment and Route Selection in Static Wireless Networks. [Doctoral Dissertation]. Rice University; 2012. Available from: http://hdl.handle.net/1911/64651
18.
Tang, Lei.
High-Performance Communication Protocols for Asynchronous Duty-Cycling Wireless Networks.
Degree: PhD, Engineering, 2013, Rice University
URL: http://hdl.handle.net/1911/77561
► Duty cycling is a technique for saving energy in resource-limited wireless networks such as sensor networks. With duty cycling, each node periodically switches between active…
(more)
▼ Duty cycling is a technique for saving energy in resource-limited
wireless networks such as sensor
networks. With duty cycling, each node periodically switches between active and sleeping states, for example being active for only 1 to 10 percent of the time.
Wireless duty-cycling
networks face many challenges such as maintaining high energy efficiency, efficient packet delivery under dynamic channel conditions, and effective route discovery. This thesis presents a series of protocols to address these challenges.
The first part of this thesis presents a new single-channel energy-efficient MAC protocol, called the Predictive-Wakeup MAC (PW-MAC). The key idea behind PW-MAC is to allow each node to wake up asynchronously at randomized times, while enabling senders to predict receiver wakeup times to save energy.
Extending the randomized predictive wakeup mechanism of PW-MAC, the second part of this thesis presents a new multichannel energy-efficient MAC protocol, called the Efficient-Multichannel MAC (EM-MAC). EM-MAC enables each node to dynamically optimize the selection of
wireless channels it utilizes based on the channel conditions it senses. By adapting to changing channel conditions, EM-MAC achieves high packet delivery performance. EM-MAC also achieves high energy efficiency through its predictive multichannel wakeup mechanism.
Although duty cycling saves energy, I found that, in asynchronous duty-cycling
networks, existing on-demand routing protocols tend to discover routes much worse than the optimal routes. The last part of this thesis presents four optimization techniques to improve the routes discovered in such
networks. These optimizations are fully distributed and work on different route metrics, such as hop-count and ETX.
Implemented in TinyOS on a testbed of MICAz sensor nodes, PW-MAC achieved the lowest energy consumption and delivery latency among the single-channel protocols, while EM-MAC significantly outperformed all other protocols tested. EM-MAC maintained the lowest duty cycles, the lowest packet delivery latency, and 100% packet delivery ratio across all experiments, including those with concurrent multihop traffic flows, and those with heavy ZigBee and Wi-Fi interference. Finally, in simulations on the ns-2 network simulator, compared with the conventional on-demand route discovery, the presented route discovery optimizations substantially improved the routes discovered in asynchronous duty-cycling
networks.
Advisors/Committee Members: Johnson, David B. (advisor), Ng, T. S. Eugene (committee member), Knightly, Edward W. (committee member).
Subjects/Keywords: Predictive wakeup; Asynchronous duty cycling; Multichannel energy efficient protocol; Wireless energy-efficient protocol; Wireless duty cycling; Medium access control (MAC) protocol; Energy-efficient MAC protocol; Multichannel duty-cycling protocol; Dynamic channel selection; Route discovery optimizations; Routing protocol; Route discovery in asynchronous duty-cycling networks
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APA (6th Edition):
Tang, L. (2013). High-Performance Communication Protocols for Asynchronous Duty-Cycling Wireless Networks. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/77561
Chicago Manual of Style (16th Edition):
Tang, Lei. “High-Performance Communication Protocols for Asynchronous Duty-Cycling Wireless Networks.” 2013. Doctoral Dissertation, Rice University. Accessed December 13, 2019.
http://hdl.handle.net/1911/77561.
MLA Handbook (7th Edition):
Tang, Lei. “High-Performance Communication Protocols for Asynchronous Duty-Cycling Wireless Networks.” 2013. Web. 13 Dec 2019.
Vancouver:
Tang L. High-Performance Communication Protocols for Asynchronous Duty-Cycling Wireless Networks. [Internet] [Doctoral dissertation]. Rice University; 2013. [cited 2019 Dec 13].
Available from: http://hdl.handle.net/1911/77561.
Council of Science Editors:
Tang L. High-Performance Communication Protocols for Asynchronous Duty-Cycling Wireless Networks. [Doctoral Dissertation]. Rice University; 2013. Available from: http://hdl.handle.net/1911/77561
19.
Aryafar, Ehsan.
Experimental and analytical evaluation of multi-user beamforming in wireless LANs.
Degree: PhD, Engineering, 2012, Rice University
URL: http://hdl.handle.net/1911/70205
► Adaptive beamforming is a. powerful approach to receive or transmit signals of interest in a spatially selective way in the presence of interference and noise.…
(more)
▼ Adaptive beamforming is a. powerful approach to receive or transmit signals of interest in a spatially selective way in the presence of interference and noise. Recently, there has been renewed interest in adaptive beamforming driven by applications in
wireless communications, where multiple-input multiple-output (MEMO) techniques have emerged as one of the key technologies to accommodate the high number of users as well as the increasing demand for new high data rate services. Beamforming techniques promise to increase the spectral efficiency of next generation
wireless systems and are currently being incorporated in future industry standards. Although a significant amount of research has focused on theoretical capacity analysis, little is known about the performance of such systems in practice. In thesis, I experimentally and analytically evaluate the performance of adaptive beamforming techniques on the downlink channel of a
wireless LAN. To this end. I present the design and implementation of the first multi-user beam-forming system and experimental framework for
wireless LANs. Next, I evaluate the benefits of such system in two applications. First, I investigate the potential of beamforming to increase the unicast throughput through spatial multiplexing. Using extensive measurements in an indoor environment, I evaluate the impact of user separation distance, user selection, and user population size on the multiplexing gains of multi-user beamforming. I also evaluate the impact of outdated channel information due to mobility and environmental variation on the multiplexing gains of multi-user beamforming. Further, I investigate the potential of beamforming to eliminate interference at unwanted locations and thus increase spatial reuse. Second, I investigate the potential of adaptive beamforming for efficient
wireless multicasting. I address the joint problem of adaptive beamformer design at the PHY layer and client scheduling at the MAC layer by proposing efficient algorithms that are amenable to practical implementation. Next, I present the implementation of the beamforming based multicast system on the WARP platform and compare its performance against that of omni-directional and switched beamforming based multicast. Finally, I evaluate the performance of multicast beamforming under client mobility and infrequent channel feedback, and propose solutions that increase its robustness to channel dynamics.
Advisors/Committee Members: Knightly, Edward W. (advisor).
Subjects/Keywords: Applied sciences; Multi-user beamforming; Wireless local area networks; Adaptive beamforming; Wireless multicost; Channel dynamics; Computer engineering; Electrical engineering
…interference as they communicate with multiple wireless users.
Recently, there has been a growing… …adopted by the next generation of wireless standards such as 802.11 ac [4], LTE [… …investigate how
MU-MIMO techniques can benefit the unicast and multicast applications in a wireless… …channel of a cellular or wireless LAN network. In this case, multiple
users can be served… …the signal is emitted isotropically. Another example is today's wireless LAN…
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APA ·
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APA (6th Edition):
Aryafar, E. (2012). Experimental and analytical evaluation of multi-user beamforming in wireless LANs. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/70205
Chicago Manual of Style (16th Edition):
Aryafar, Ehsan. “Experimental and analytical evaluation of multi-user beamforming in wireless LANs.” 2012. Doctoral Dissertation, Rice University. Accessed December 13, 2019.
http://hdl.handle.net/1911/70205.
MLA Handbook (7th Edition):
Aryafar, Ehsan. “Experimental and analytical evaluation of multi-user beamforming in wireless LANs.” 2012. Web. 13 Dec 2019.
Vancouver:
Aryafar E. Experimental and analytical evaluation of multi-user beamforming in wireless LANs. [Internet] [Doctoral dissertation]. Rice University; 2012. [cited 2019 Dec 13].
Available from: http://hdl.handle.net/1911/70205.
Council of Science Editors:
Aryafar E. Experimental and analytical evaluation of multi-user beamforming in wireless LANs. [Doctoral Dissertation]. Rice University; 2012. Available from: http://hdl.handle.net/1911/70205
20.
Kao, David.
A Matter of Perspective: Reliable Communication and Coping with Interference with Only Local Views.
Degree: PhD, Engineering, 2012, Rice University
URL: http://hdl.handle.net/1911/64691
► This dissertation studies interference in wireless networks. Interference results from multiple simultaneous attempts to communicate, often between unassociated sources and receivers, preventing extensive coordination. Moreover,…
(more)
▼ This dissertation studies interference in
wireless networks. Interference results from multiple simultaneous attempts to communicate, often between unassociated sources and receivers, preventing extensive coordination. Moreover, in practical
wireless networks, learning network state is inherently expensive, and nodes often have incomplete and mismatched views of the network. The fundamental communication limits of a network with such views is unknown.
To address this, we present a local view model which captures asymmetries in node knowledge. Our local view model does not rely on accurate knowledge of an underlying probability distribution governing network state. Therefore, we can make robust statements about the fundamental limits of communication when the channel is quasi-static or the actual distribution of state is unknown: commonly faced scenarios in modern commercial
networks. For each local view, channel state parameters are either perfectly known or completely unknown. While we propose no mechanism for network learning, a local view represents the result of some such mechanism.
We apply the local view model to study the two-user Gaussian interference channel: the smallest building block of any interference network. All seven possible local views are studied, and we find that for five of the seven, there exists no policy or protocol that universally outperforms time-division multiplexing (TDM), justifying the orthogonalized approach of many deployed systems. For two of the seven views, TDM-beating performance is possible with use of opportunistic schemes where opportunities are revealed by the local view.
We then study how message cooperation – either at transmitters or receivers – increases capacity in the local view two-user Gaussian interference channel. The cooperative setup is particularly appropriate for modeling next-generation cellular
networks, where costs to share message data among base stations is low relative to costs to learn channel coefficients. For the cooperative setting, we find: (1) opportunistic approaches are still needed to outperform TDM, but (2) opportunities are more abundant and revealed by more local views.
For all cases studied, we characterize the capacity region to within some known gap, enabling computation of the generalized degrees of freedom region, a visualization of spatial channel resource usage efficiency.
Advisors/Committee Members: Sabharwal, Ashutosh (advisor), Aazhang, Behnaam (committee member), Knightly, Edward W. (committee member), Tapia, Richard A. (committee member), Chiang, Mung (committee member).
Subjects/Keywords: Wireless networks; Interference; Distributed systems; Information theory; Local views; Robust systems
…Introduction
One of the foremost challenges in current and future wireless networks is interference… …next and future generations of wireless networks.
1.3
Contributions & Thesis Overview
The… …channel, as it is the canonical model of the wireless networks. However, the linear… …the time-varying nature of networks and the cost
associated with learning about the network… …it is rare that any wireless node has a
complete and perfect understanding of network state…
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APA ·
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Export
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APA (6th Edition):
Kao, D. (2012). A Matter of Perspective: Reliable Communication and Coping with Interference with Only Local Views. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/64691
Chicago Manual of Style (16th Edition):
Kao, David. “A Matter of Perspective: Reliable Communication and Coping with Interference with Only Local Views.” 2012. Doctoral Dissertation, Rice University. Accessed December 13, 2019.
http://hdl.handle.net/1911/64691.
MLA Handbook (7th Edition):
Kao, David. “A Matter of Perspective: Reliable Communication and Coping with Interference with Only Local Views.” 2012. Web. 13 Dec 2019.
Vancouver:
Kao D. A Matter of Perspective: Reliable Communication and Coping with Interference with Only Local Views. [Internet] [Doctoral dissertation]. Rice University; 2012. [cited 2019 Dec 13].
Available from: http://hdl.handle.net/1911/64691.
Council of Science Editors:
Kao D. A Matter of Perspective: Reliable Communication and Coping with Interference with Only Local Views. [Doctoral Dissertation]. Rice University; 2012. Available from: http://hdl.handle.net/1911/64691
21.
Flores Miranda, Adriana.
Dual Wi-Fi: Dual Channel Wi-Fi for Congested WLANs with Asymmetric Traffic Loads.
Degree: MS, Engineering, 2013, Rice University
URL: http://hdl.handle.net/1911/78579
► In many WLANs scenarios, the load transmitted from the AP to the clients (Downlink), far outweighs traffic demand from the clients to the AP (Uplink),…
(more)
▼ In many WLANs scenarios, the load transmitted from the AP to the clients (Downlink), far outweighs traffic demand from the clients to the AP (Uplink), thereby yielding traffic asymmetry. Moreover, when many clients associate with a single AP, the clients can cause a disproportional amount of medium contention compared to the AP, producing contention asymmetry. We present Dual Wi-Fi, a MAC architecture and protocol that minimizes MAC overhead by matching spectrum resources to traffic asymmetry. Dual Wi-Fi separates uplink and downlink data traffic into two variable-width independent channels, each allocated in accordance to the network's traffic demand. Our experimental and simulation results demonstrate that Dual Wi-Fi matches downlink vs. uplink throughput ratio to demand ratio within 1% under any client density and traffic load. Through this matching
capability, Dual Wi-Fi offers unbounded downlink gains as congestion increases, minimizing and in some cases eliminating retransmissions and contention time.
Advisors/Committee Members: Knightly, Edward W. (advisor), Sabharwal, Ashutosh (committee member), Zhong, Lin (committee member).
Subjects/Keywords: Traffic Asymmetry; IEEE 802.11; Wireless local area networks; Hotspot; Medium access control (MAC); Multi-channel random access; Spectrum efficiency
…for uplink traffic to counter increasing contention
in dense networks. We observed that for… …location of wireless
links [5]. Other studies have demonstrated sub-channel isolation… …uplink data channels, allow simultaneous transmissions even in clique networks.
provides in… …Debian Linux with Atheros wireless chipset version
AR5413 supporting 802.11a/b/g and utilizing… …an ath5k wireless driver. In order to
support 5/10/20 MHz channels, we implement a modified…
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APA ·
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APA (6th Edition):
Flores Miranda, A. (2013). Dual Wi-Fi: Dual Channel Wi-Fi for Congested WLANs with Asymmetric Traffic Loads. (Masters Thesis). Rice University. Retrieved from http://hdl.handle.net/1911/78579
Chicago Manual of Style (16th Edition):
Flores Miranda, Adriana. “Dual Wi-Fi: Dual Channel Wi-Fi for Congested WLANs with Asymmetric Traffic Loads.” 2013. Masters Thesis, Rice University. Accessed December 13, 2019.
http://hdl.handle.net/1911/78579.
MLA Handbook (7th Edition):
Flores Miranda, Adriana. “Dual Wi-Fi: Dual Channel Wi-Fi for Congested WLANs with Asymmetric Traffic Loads.” 2013. Web. 13 Dec 2019.
Vancouver:
Flores Miranda A. Dual Wi-Fi: Dual Channel Wi-Fi for Congested WLANs with Asymmetric Traffic Loads. [Internet] [Masters thesis]. Rice University; 2013. [cited 2019 Dec 13].
Available from: http://hdl.handle.net/1911/78579.
Council of Science Editors:
Flores Miranda A. Dual Wi-Fi: Dual Channel Wi-Fi for Congested WLANs with Asymmetric Traffic Loads. [Masters Thesis]. Rice University; 2013. Available from: http://hdl.handle.net/1911/78579
. 
Open Access Theses and Dissertations
