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研究生:施旻錞
研究生(外文):Shih, Min-Chun
論文名稱:一個新的方法在雲端無線接取網路下基於借位-補位之動態基頻單元與遠端無線電站配對機制
論文名稱(外文):A Dynamic BBU-RRH Mapping Scheme Using Borrow-and-Lend Approach in Cloud Radio Access Networks
指導教授:陳裕賢陳裕賢引用關係
指導教授(外文):Chen, Yuh-Shyan
口試委員:張志勇莊東穎陳宗禧許智舜陳裕賢
口試委員(外文):Chang, Chih-YungChuang, Tung-YinChen, Tzung-ShiHsu, Chih-ShunChen, Yuh-Shyan
口試日期:2014-07-29
學位類別:碩士
校院名稱:國立臺北大學
系所名稱:資訊工程學系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2014
畢業學年度:102
語文別:英文
論文頁數:35
中文關鍵詞:雲端無線接取網路基頻處理單元-遠端無線電站配對機制集中式管理借與還方法
外文關鍵詞:C-RANresource allocationBBU-RRH mapping schemecentralized managementborrow-and-lend approach
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在未來網路中,雲端無線接取網路將基頻處理單元從基地台抽取至基頻單元池而成為一個有潛力解決網路交通需求的網路架構,使基頻處理單元與遠端無線電站之間的連線可以動態的改變。在雲端無線接取網路下基頻處理單元成為一共享的資源,資源分配機制也因此被重新定義。現有的研究一次考慮一個基頻處理單元以進行配對機制,本篇目標在於利用雲端無線接取網路集中化的特性使用借與還的概念一次針對多個基頻處理單元進行資源分配機制,找出能夠幫助最大數量的基頻處理單元以及使用最低限度的資源進行配對機制。模擬中描述資源過載比例的減少以及高吞吐量的維持。
Cloud radio access networks (C-RAN) is a potential solution to meet the traffic demand of the future network, which migrates the baseband units (BBU) to the BBU pool in the cloud. The connection between BBU and RRH can be dynamically changed and the resources can be allocated more flexible according to some factor e.g., traffic demand of RRHs. Therefore, the resource allocation scheme in C-RAN is redefined, which regards the BBUs as a sharing resource. Existing studies execute the mapping scheme with the consideration of the single BBU but not the whole network, e.g., the BBU with high utilization switches the supported RRH to other BBU to reduce the resource usage. To achieve this goal, this thesis makes use of the concept of cloud resources and centralized management to fully utilize the resources and allocate the resources more centralized. The main contribution of this work is to propose a dynamic BBU-RRH mapping scheme using borrow-and-lend approach to dynamically allocate the resources to RRHs in a clever and efficient way. With the centralized management, the max busy group borrows the resource for RRH switching while the min helper group lends the resource to handle the switching RRHs. Finally, simulation results illustrate the proposed mechanism in C-RAN significantly reduces the waste of the resource usage and improves the throughput.
1 Introduction 1
2 Related Works 3
2.1 Related works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.2 Motivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Preliminaries 6
3.1 System architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 Problem formulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3 Basic idea . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . 11
4 A Dynamic BBU-RRH Mapping Scheme Using Borrow-and-Lend Approach in Cloud Radio Access Networks 13
4.1 Network trac topologizing phase . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.2 Max and min BBUs searching phase . . . . . . .. . . . . . . . . . . . . . . . . . . . 18
4.3 Dynamic borrow-and-lend mapping phase . . . . . . .. . . . . . . . . . . . . . . . . 23
5 Simulation Results 26
5.1 Packet throughput (PT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.2 Spectrum eciency (SE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.3 Probability of packet loss (PPL) . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.4 Transmission latency (TL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
6 Conclusions 31
7 Acknowledgments 32
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[21] Department of Industrial Engineering and Operations Research, "Network Flows and Graphs," University of California, Berkeley, 2008.
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