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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/102571

    Title: 應用LTE-A使用者移動速率之換手預測機制
    Other Titles: A handover prediction mechanism based on mobility in LTE-A
    Authors: 林意勛;Lin, Yi-Hsun
    Contributors: 淡江大學資訊工程學系碩士班
    Keywords: 換手;使用者歷史資訊;換手失敗率;乒乓換手率;Handover;LTE-A;Handover failure rate;Ping-ping handover rate
    Date: 2014
    Issue Date: 2015-05-04 09:59:10 (UTC+8)
    Abstract: 進階長程演進網路(Long Term Evolution-Advanced, LTE-A)是由3GPP 所制定的高速無線網路的標準,以提供高速率及低延遲的無線網路為目標。當使用者設備逐漸遠離原服務基地台的訊號範圍時,會導致所接收的訊號強度減弱,甚至中斷連線。此時就必須執行換手(handover)的程序,當執行換手時,可能會因為過早換手、過晚換手與換手至錯誤基地台造成換手失敗,導致封包遺失或通訊斷訊的問題。
    3GPP Long Term Evolution- Advanced (LTE-A) defines a wireless network standard for high packet transmission rate and low packet latency provisions. When an user equipment(UE) moves away from signal range of serving cell may cause the received signal strength weakened, even if disconnected. To solve this problem, it is necessary to execute handover procedure. When executed handover procedure, it is may fail because to early handover, to late handover or handover to wrong cell and then occur packet loss or communication interruption problems.
    In this thesis, we propose predicted handover mechanism. User equipments provide history information for eNBs to estimate the user equipment’s location and velocity. Based on history information, our proposed mechanism can achieve to handover the appropriate target cell. Through selecting the target cell efficiently, we can reduce the rate of handover failure and Ping-Pong handover. Finally, improving the UE’s QoS. And conducted a simulation integration, combined with the user equipment velocity prediction mechanism and trigger time adjustment mechanism. Experimental results show that compared with the standard user equipment handover process can significantly reduce the rate of handover failure and Ping-Pong handover.
    Appears in Collections:[資訊工程學系暨研究所] 學位論文

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