DC 欄位 |
值 |
語言 |
DC.contributor | 資訊工程學系 | zh_TW |
DC.creator | 劉岳昕 | zh_TW |
DC.creator | Yuen-Xin Liu | en_US |
dc.date.accessioned | 2017-8-4T07:39:07Z | |
dc.date.available | 2017-8-4T07:39:07Z | |
dc.date.issued | 2017 | |
dc.identifier.uri | http://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=104522072 | |
dc.contributor.department | 資訊工程學系 | zh_TW |
DC.description | 國立中央大學 | zh_TW |
DC.description | National Central University | en_US |
dc.description.abstract | 為了滿足日漸增長流量需求,行動網路營運商將免執照頻段引入到LTE中,使其得到更大的頻寬。但若沒有公平的共存方法,將會嚴重危害目前在免執照頻段中Wi-Fi的效能。在本篇論文,我們提出一套利用Wi-Fi競爭視窗大小來分配占空比的共存方法。我們在LTE基地台中安裝虛擬Wi-Fi傳送節點,利用該節點來模擬分散式協調功能,得到目前網路中競爭視窗大小,根據平均競爭視窗大小估算目前Wi-Fi網路的流量,分配合適的占空比。我們提出的共存方法可以保證Wi-Fi與LTE之間的公平性,並提高頻譜使用效率。最後,我們利用NS3這套模擬軟體去評估我們與其他共存方法的效能。 | zh_TW |
dc.description.abstract | In order to satisfy increasing traffic demands, LTE-U offloads its traffic on unlicensed channels by aggregating its licensed and unlicensed carriers. However, coexistence of LTE-U and unlicensed users such as WiFi causes significant interference, which degrades the throughput of WiFi systems. In this paper, we propose fair coexistence scheme that allocates LTE-off period (i.e., time for WiFi transmissions) according to Wi-Fi traffic volume. We can estimate Wi-Fi traffic level based on average contention window size. Simulation results show that our coexistence scheme outperforms state-of-the-art techniques in terms of fairness. | en_US |
DC.subject | LTE-U | zh_TW |
DC.subject | Wi-Fi | zh_TW |
DC.subject | 免執照頻段 | zh_TW |
DC.subject | 競爭視窗 | zh_TW |
DC.subject | 占空比 | zh_TW |
DC.subject | LTE-U | en_US |
DC.subject | Wi-Fi | en_US |
DC.subject | Unlicensed Spectrum | en_US |
DC.subject | Contention Window | en_US |
DC.subject | Duty Cycle | en_US |
DC.title | 基於競爭窗口的LTE在未授權頻譜設計 | zh_TW |
dc.language.iso | zh-TW | zh-TW |
DC.title | Contention window based design for LTE in unlicensed spectrum | en_US |
DC.type | 博碩士論文 | zh_TW |
DC.type | thesis | en_US |
DC.publisher | National Central University | en_US |