博碩士論文 104522072 完整後設資料紀錄

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:444/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