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You searched for subject:(LTE U). Showing records 1 – 3 of 3 total matches.

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NSYSU

1. Yan, Yu-dai. Unlicensed Spectrum Allocation for LTE and Wi-Fi Coexistence with HAP.

Degree: Master, Computer Science and Engineering, 2017, NSYSU

With the rapid development of technology, wireless network technology innovation, a variety of applications and great improvement of the network quality, almost everyone carries a mobile phone nowadays. People usually watch video on the Internet and high-resolution of audio and video services provide users with more enjoyable experience, causing the explosive increase of the mobile network data traffic. The growth of network traffic has significantly increased the network loads, and the problem of spectrum resource shortages has become more serious. Due to insufficient of spectrum resources, many technical architectures have been proposed to provide better network quality for numerous users, such as heterogeneous network (HetNet), vehicular network (VANET), Device to Device (D2D), and so on. Although these methods can alleviate the problem of serious loads, but the rapid growth of network traffic still lead to the shortage of network resources. Therefore, Long Term Evolution (LTE) has begun to develop the implementation on the unlicensed band. In the unlicensed band, there have been many systems using it, Wi-Fi system is the largest among them. LTE is the technical standards proposed by 3GPP, and Wi-Fi technology is based on the IEEE 802.11 standard. The operating mode of this two systems are very different. In order to access the unlicensed band effectively without affecting the Wi-Fi system, the goal of this paper is to propose a method for the coexistence of LTE and Wi-Fi. Advisors/Committee Members: Bing-Hong Liu (chair), Wei-Kuang Lai (committee member), Chung-Ming Huang (chair), Richard Kin (chair), Wen-Shyong Hsieh (chair).

Subjects/Keywords: Small Cell; LTE-U; Licensed Assisted Access (LAA); Wi-Fi; Long Term Evolution (LTE)

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APA (6th Edition):

Yan, Y. (2017). Unlicensed Spectrum Allocation for LTE and Wi-Fi Coexistence with HAP. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0808117-121155

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):

Yan, Yu-dai. “Unlicensed Spectrum Allocation for LTE and Wi-Fi Coexistence with HAP.” 2017. Thesis, NSYSU. Accessed September 22, 2017. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0808117-121155.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Yan, Yu-dai. “Unlicensed Spectrum Allocation for LTE and Wi-Fi Coexistence with HAP.” 2017. Web. 22 Sep 2017.

Vancouver:

Yan Y. Unlicensed Spectrum Allocation for LTE and Wi-Fi Coexistence with HAP. [Internet] [Thesis]. NSYSU; 2017. [cited 2017 Sep 22]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0808117-121155.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Yan Y. Unlicensed Spectrum Allocation for LTE and Wi-Fi Coexistence with HAP. [Thesis]. NSYSU; 2017. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0808117-121155

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. Jabbariardebili, Lida. Performance Analysis of Coexistence Schemes for LTE in Unlicensed Bands.

Degree: MASc - Master of Applied Science, Computer Engineering, 2017, York University

LTE in the unlicensed spectrum, is becoming a popular area of research. Since LTE-Unlicensed (LTE-U) provides subscribers with higher-quality mobile voice, and video experience in high-traffic or low-signal locations, a fair coexistence mechanism with other networks, like Wi-Fi is essential. In this thesis, we propose two coexistence mechanisms that could be employed to ensure a fair channel access. First, we consider coexistence mechanism fundamentals, and then downlink system performance of two coexistence mechanisms are analyzed for multi-operator LTE-Unlicensed (LTE-U) deployments with different simulation scenarios, using NS-3. First we introduce the most trustworthy coexistence mechanism, and then a high-performance coexistence scenario is provided. We conclude that Licensed Assisted Access (LAA) can coexist with Wi-Fi without impacting Wi-Fi more than an equivalent Wi-Fi network. In the second part, uplink performance evaluation of LTE in licensed spectrum is also demonstrated. Advisors/Committee Members: Eckford, Andrew W. (advisor).

Subjects/Keywords: Electrical engineering; LTE cellular system; Unlicensed spectrum; Coexistence scheme; Performance analysis; LTE-A; LTE-U; LAA; LWA; CSAT; Duty cycle; LBT; Listen-Before-Talk; SDL

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Jabbariardebili, L. (2017). Performance Analysis of Coexistence Schemes for LTE in Unlicensed Bands. (Masters Thesis). York University. Retrieved from http://hdl.handle.net/10315/33430

Chicago Manual of Style (16th Edition):

Jabbariardebili, Lida. “Performance Analysis of Coexistence Schemes for LTE in Unlicensed Bands.” 2017. Masters Thesis, York University. Accessed September 22, 2017. http://hdl.handle.net/10315/33430.

MLA Handbook (7th Edition):

Jabbariardebili, Lida. “Performance Analysis of Coexistence Schemes for LTE in Unlicensed Bands.” 2017. Web. 22 Sep 2017.

Vancouver:

Jabbariardebili L. Performance Analysis of Coexistence Schemes for LTE in Unlicensed Bands. [Internet] [Masters thesis]. York University; 2017. [cited 2017 Sep 22]. Available from: http://hdl.handle.net/10315/33430.

Council of Science Editors:

Jabbariardebili L. Performance Analysis of Coexistence Schemes for LTE in Unlicensed Bands. [Masters Thesis]. York University; 2017. Available from: http://hdl.handle.net/10315/33430

3. Khawer, Mohammad Riaz. Design of a High Capacity, Scalable, and Green Wireless Communication System Leveraging the Unlicensed Spectrum.

Degree: PhD, Electrical Engineering and Computer Science, 2015, Syracuse University

The stunning demand for mobile wireless data that has been recently growing at an exponential rate requires a several fold increase in spectrum. The use of unlicensed spectrum is thus critically needed to aid the existing licensed spectrum to meet such a huge mobile wireless data traffic growth demand in a cost effective manner. The deployment of Long Term Evolution (LTE) in the unlicensed spectrum (LTE-U) has recently been gaining significant industry momentum. The lower transmit power regulation of the unlicensed spectrum makes LTE deployment in the unlicensed spectrum suitable only for a small cell. A small cell utilizing LTE-L (LTE in licensed spectrum), and LTE-U (LTE in unlicensed spectrum) will therefore significantly reduce the total cost of ownership (TCO) of a small cell, while providing the additional mobile wireless data offload capacity from Macro Cell to small cell in LTE Heterogeneous Networks (HetNet), to meet such an increase in wireless data demand. The U.S. 5 GHz Unlicensed National Information Infrastructure (U-NII) bands that are currently under consideration for LTE deployment in the unlicensed spectrum contain only a limited number of 20 MHZ channels. Thus in a dense multi-operator deployment scenario, one or more LTE-U small cells have to co-exist and share the same 20 MHz unlicensed channel with each other and with the incumbent Wi-Fi. This dissertation presents a proactive small cell interference mitigation strategy for improving the spectral efficiency of LTE networks in the unlicensed spectrum. It describes the scenario and demonstrate via simulation results, that in the absence of an explicit interference mitigation mechanism, there will be a significant degradation in the overall LTE-U system performance for LTE-U co-channel co-existence in countries such as U.S. that do not mandate Listen-Before-Talk (LBT) regulations. An unlicensed spectrum Inter Cell Interference Coordination (usICIC) mechanism is then presented as a time-domain multiplexing technique for interference mitigation for the sharing of an unlicensed channel by multi-operator LTE-U small cells. Through extensive simulation results, it is demonstrated that the proposed usICIC mechanism will result in 40% or more improvement in the overall LTE-U system performance (throughput) leading to increased wireless communication system capacity. The ever increasing demand for mobile wireless data is also resulting in a dramatic expansion of wireless network infrastructure by all service providers resulting in significant escalation in energy consumption by the wireless networks. This not only has an impact on the recurring operational expanse (OPEX) for the service providers, but importantly the resulting increase in greenhouse gas emission is not good for the environment. Energy efficiency has thus become one of the critical tenets in the design and deployment of Green wireless communication systems. Consequently the market trend for next-generation communication systems has been… Advisors/Committee Members: Jian Tang.

Subjects/Keywords: 4G Wireless Networks; Distributed & Parallel Processing; Interference Mitigiation; LTE-U; Performance Optimization; Unlicensed Spectrum; Engineering

…Energy Efficiency as a result of Disabling the LTE-U Service .................. 75 viii 3.6 4… …116 ix List of Figures Figure 1: Single Operator LTE-U Deployment Scenario in a Wireless… …HetNet ............. 28 Figure 2: TCSAT Gating Cycle for LTE-U Channel Sharing with Wi-Fi… …30 Figure 3: Multi-Operator LTE-U Co-channel Interference Scenario… …35 Figure 5: LTE-U SINR Distribution Comparison… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Khawer, M. R. (2015). Design of a High Capacity, Scalable, and Green Wireless Communication System Leveraging the Unlicensed Spectrum. (Doctoral Dissertation). Syracuse University. Retrieved from http://surface.syr.edu/etd/393

Chicago Manual of Style (16th Edition):

Khawer, Mohammad Riaz. “Design of a High Capacity, Scalable, and Green Wireless Communication System Leveraging the Unlicensed Spectrum.” 2015. Doctoral Dissertation, Syracuse University. Accessed September 22, 2017. http://surface.syr.edu/etd/393.

MLA Handbook (7th Edition):

Khawer, Mohammad Riaz. “Design of a High Capacity, Scalable, and Green Wireless Communication System Leveraging the Unlicensed Spectrum.” 2015. Web. 22 Sep 2017.

Vancouver:

Khawer MR. Design of a High Capacity, Scalable, and Green Wireless Communication System Leveraging the Unlicensed Spectrum. [Internet] [Doctoral dissertation]. Syracuse University; 2015. [cited 2017 Sep 22]. Available from: http://surface.syr.edu/etd/393.

Council of Science Editors:

Khawer MR. Design of a High Capacity, Scalable, and Green Wireless Communication System Leveraging the Unlicensed Spectrum. [Doctoral Dissertation]. Syracuse University; 2015. Available from: http://surface.syr.edu/etd/393

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