基於部分頻率重複使用之合作式通訊架構以提升細胞邊緣使用者之通訊效能

Fractional Frequency Reuse based cooperative communication for enhancing the communication performance of cell-edge users

張維哲(Wei-Che Chang)

指導教授 ： 林信標

國立臺北科技大學/電資學院/電腦與通訊研究所/碩士(2011年)

https://doi.org/10.6841/NTUT.2011.00156

摘要

由於無線通訊系統的快速演進，以及手持式裝置(如Smartphone、Notebook等)的使用越來越普遍，消費者對於無線通訊傳輸速率與傳輸品質的需求也相對提高。中繼站(Relay)的使用對下一代的蜂巢式網路來說，是改善覆蓋率及細胞邊緣通訊品質的重要技術，而部分頻率重複使用(Fractional Frequency Reuse；FFR)，藉由頻率使用規劃，可有效的降低細胞間相互干擾(Inter Cell Interference；ICI)，提高細胞邊緣使用者接收訊號的可靠度。本論文使用Relay合作式通訊架構建立的模擬平台，可對系統中三種元素Source、Relay以及Destination做任意位置的規劃佈建，分析最適合Relay佈建的方式；本論文更依據各使用者的訊號與雜訊干擾比(Signal to Interference and Noise Ratio；SINR)對位元錯誤率(Bit Error Rate；BER)及吞吐量(Throughput)間的關係，判斷使用者採用Relay幫忙傳送資料除了有效提升資料可靠度外，對整體Throughput的影響，在BER和Throughput間做權衡；最後，系統再結合FFR頻率規劃方案，由於使用不同頻段做傳輸，彼此干擾影響低，Relay在傳送資料時，基地台可以選擇特定使用者，同時利用同頻段傳送訊號給這些選定使用者，在犧牲些微且可接受的傳輸效能情況下，提高整體系統效能。模擬結果顯示，本論文可依據不同佈建方式，判斷使用者效能變化，來得到Relay較理想佈建方式，並依據使用者SINR對BER及Throughput間的關係選用Relay做傳輸，比起在傳統單基地站傳輸系統中，更能有效提升資料可靠度及Throughput，在犧牲些微傳輸效能下，大大提升整體系統效能。

關鍵字

中繼站 ； 部分頻率重複使用 ； 合作式通訊

並列摘要

As the rapid evolution of wireless communication systems and the use of handheld devices(such as Smartphone, Notebook, etc.) is increasingly common, consumer demand for wireless communication transmission rate and transmission quality is relative increase. For next-generation cellular networks, the use of relay station is an important technology to improve the communication coverage and quality of cell-edge, by using Fractional Frequency Reuse (FFR) of frequency-use planning, can effectively reduce the Inter Cell Interference(ICI), improve the received signal reliability of cell-edge users. This paper uses a simulation platform established by relay cooperative communications architecture, three elements of the system : source, relay, and destination, can be location planning to any provisioning, analysis the most suitable way of relay provisioning; this paper is more based on the user's Signal to Interference and Noise Ratio(SINR) on the relationship between Bit Error Rate (BER) and Throughput, determine the users use relay to send data in addition to effectively improve data reliability, the impact on the overall Throughput, tradeoff BER and Throughput; final, system combined with the FFR frequency planning, because of using different transmission frequency band, only have low-interference with each other, when relay is sending data, the base station can select a specific user, at the same time using the same frequency band to send signals to the selected users, and acceptable at the expense of a slight case of transmission efficiency, improve overall system performance.Simulation results show that this paper can be different based provisioning methods to determine the effectiveness of the user changes to get the preferred provisioning method relay, based on the user's SINR on the relationship BER and Throughput to choose relay to do transmission, compared to the traditional single base station transmission system, it's more effectively to enhance the data reliability and throughput, at the expense of slightly transmission efficiency, it's greatly enhance overall system performance.

並列關鍵字

Relay ； FFR ； Cooperative Communication

參考文獻

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