Joint Relaying Selection and Power Allocation Algorithms for Cooperative Cellular System  

作　　者：ZHANG Jing-mei SHAO Chun-ju WANG Ying ZHANG Ping 

机构地区：[1]Wireless Technology Innovation Institute, Eeijing University of Posts & Telecommunications, Eeijing 100876, P.R. China

出　　处：《The Journal of China Universities of Posts and Telecommunications》2005年第4期88-93,共6页中国邮电高校学报（英文版）

基　　金：This workis supported by NSFC(60302024);High-Tech Cooperation Project between Chinese and Swedish government .

摘　　要：An architecture introducing wireless relaying technologies into the cellular infrastructure has emerged as an approuch to enlarge the coverage area and enhance system capacity. In this paper, a two-hop cellular system incorporated with the fixed Relaying Station （ RS） is studied, where besides the Uniform Power Allocation （UPA）, the Optimal Power Allocation （OPA） between the Base Station （BS） and RS is also adopted considering resource utilization. To marimize the performance gains and reduce the overhead, it is necessary to provide an effective RS selection algorithm and combine it with other resource management strategies. So two kinds of RS selection criteria based upon Signal to Interference Ratio （SIR） and PathLoss （PL）, are evolved into four Joint RS Selection and Power Allocation （JRSPA） algorithms, which are ba.cedon SIR with OPA （SIR OPA）, SIR with UPA （SIR UPA）, PL with OPA （PLOPA） and PL with UPA （PLUPA）. The simulation results show that among these four algorithms, the SIR OPA scheme provides the best capacity performance, but taking the overhead into account, the PLOPA scheme is a better choice to reduce the complexity and trade off the system performance with signaling load.An architecture introducing wireless relaying technologies into the cellular infrastructure has emerged as an approuch to enlarge the coverage area and enhance system capacity. In this paper, a two-hop cellular system incorporated with the fixed Relaying Station （ RS） is studied, where besides the Uniform Power Allocation （UPA）, the Optimal Power Allocation （OPA） between the Base Station （BS） and RS is also adopted considering resource utilization. To marimize the performance gains and reduce the overhead, it is necessary to provide an effective RS selection algorithm and combine it with other resource management strategies. So two kinds of RS selection criteria based upon Signal to Interference Ratio （SIR） and PathLoss （PL）, are evolved into four Joint RS Selection and Power Allocation （JRSPA） algorithms, which are ba.cedon SIR with OPA （SIR OPA）, SIR with UPA （SIR UPA）, PL with OPA （PLOPA） and PL with UPA （PLUPA）. The simulation results show that among these four algorithms, the SIR OPA scheme provides the best capacity performance, but taking the overhead into account, the PLOPA scheme is a better choice to reduce the complexity and trade off the system performance with signaling load.

关 键 词：relaying selection power allocation COOPERATIVE CELLULAR 

分 类 号：TN92[电子电信—通信与信息系统]