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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/72008


    Title: 高速鐵路環境下之通道預測暨比例公平性排程設計;Low Overhead Channel Prediction for Proportional Fair Scheduling in High Speed Rail
    Authors: 張維尹;Chang,Wei-Yin
    Contributors: 通訊工程學系
    Keywords: 長期演進技術;高速鐵路;中繼器;預測技術;比例公平;LTE;High-Speed Rail;Relay;Prediction;Fairness
    Date: 2016-08-26
    Issue Date: 2016-10-13 14:11:42 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 隨著多媒體應用的普及,對於頻寬的需求也日益增高,而通訊網路的頻譜使用效率儼然成為此項的一大重點,像是各種排程方法及多用戶多輸入輸出技術等等…都已有不少的討論與研究被提出,分別用在不同情境時也都取得了想當不錯的效果,然而,在有些情況裡則需要更多的考量以因應環境的變化,如高速移動之環境。

    時至今日,高速鐵路已然成為非常受歡迎的大眾運輸工具,其快速的便捷特性更深受需要南北奔波的工作者喜愛,但其令人讚賞的高速特性,往往會讓基地台在排程時遭受不小的影響,首當其衝的便是整體系統吞吐量的下降。

    用戶所回報的通道資訊是基地台在排程時的一個重要依據,而當移動速度過快時,基地台當下所接收到的資訊可能已超過其時效性(Out of date information),因利用過時的資訊做排程,繼而使得總體系統的吞吐量下降,這是我們所不樂見的。

    因軌道固定的特性,本文提出了在考慮公平性的前提下,利用了通道預測的技術解決高速移動通道資訊時效性的問題,並顧及QoS的排程方法。最後,以模擬的方式提供各種情境下以及對應項目的數值比較作為排程方法的驗證。;With the popularity of multimedia applications, the demand of bandwidth grows up day by day, in next generation cellular system, high-speed situation will often appears, such as high-speed rail. The rapid speed may cause the channel signal information out of date which reported by user equipment (UE) and will make system throughput decline, so how to solve this problem is the way need to consider. Nowadays, some prediction method have been proposed to solve the problem of system throughput decline in high-speed situation, but they will occupied large amounts of uplink bandwidth.

    In this thiese, we propose the channel prediction technology of high-speed mobile channel, taking into account the scheduling method, to solve the problem of the timeliness information without occupied large amounts of uplink bandwidth. Finally, we provide simulation results based on different situation for comparing, verify the method we proposed.
    Appears in Collections:[Graduate Institute of Communication Engineering] Electronic Thesis & Dissertation

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