Performance Analysis in Cloud Radio Access Networks:User-Centralized Coordination Approach  

作　　者：Munzali Ahmed Abana SUN Yaohua Manzoor Ahmed Lukman A.Olawoyin LI Yong 

机构地区：[1]Key Laboratory of Universal Wireless Communication,Ministry of Education,Beijing University of Posts and Telecommunications [2]Wireless Communication Center,Beijing University of Posts and Telecommunications

出　　处：《China Communications》2015年第11期12-23,共12页中国通信（英文版）

基　　金：supported in part by the National Natural Science Foundation of China (Grant No. 61222103);the Beijing Natural Science Foundation (Grant No. 4131003);the Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP) (Grant No. 20120005140002);the National High Technology Research and Development Program (863 Program) of China under Grant No. 2014AA01A707

摘　　要：The cloud radio access network(C-RAN) has recently been proposed as an important component of the next generation wireless networks providing opportunities for improving both spectral and energy effi ciencies. The performance of this network structure is however constrained by severe inter-cell interference due to the limited capacity of fronthaul between the radio remote heads(RRH) and the base band unit(BBU) pool. To achieve performance improvement taking full advantage of centralized processing capabilities of C-RANs,a set of RRHs can jointly transmit data to the same UE for improved spectral effi ciency. In this paper,a user centralized joint coordinated transmission(UC-JCT) scheme is put forth to investigate the downlink performance of C-RANs. The most important benefit the proposed strategy is the ability to translate what would have been the most dominant interfering sources to usable signal leading to a signifi cantly improved performance. Stochastic geometry is utilized to model the randomness of RRH location and provides a reliable performance analysis. We derive an analytical expression for the closed integral form of the coverage probability of a typical UE. Simulation results confirm the accuracy of our analysis and demonstrate that significant performance gain can be achieved from the proposed coordination schemes.The cloud radio access network(C-RAN) has recently been proposed as an important component of the next generation wireless networks providing opportunities for improving both spectral and energy effi ciencies. The performance of this network structure is however constrained by severe inter-cell interference due to the limited capacity of fronthaul between the radio remote heads(RRH) and the base band unit(BBU) pool. To achieve performance improvement taking full advantage of centralized processing capabilities of C-RANs,a set of RRHs can jointly transmit data to the same UE for improved spectral effi ciency. In this paper,a user centralized joint coordinated transmission(UC-JCT) scheme is put forth to investigate the downlink performance of C-RANs. The most important benefit the proposed strategy is the ability to translate what would have been the most dominant interfering sources to usable signal leading to a signifi cantly improved performance. Stochastic geometry is utilized to model the randomness of RRH location and provides a reliable performance analysis. We derive an analytical expression for the closed integral form of the coverage probability of a typical UE. Simulation results confirm the accuracy of our analysis and demonstrate that significant performance gain can be achieved from the proposed coordination schemes.

关 键 词：CLOUD radio access network POISSON point process COVERAGE probability joint COORDINATED transmission BASEBAND unit 

分 类 号：TN92[电子电信—通信与信息系统]