Achieving fairness by aggregate power allocation in opportunistic cooperation networks  

作　　者：曹建飞 Zhong Zhangdui, Ai Bo 

机构地区：[1]State Key Laboratory of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing 100044, P.R. China

出　　处：《High Technology Letters》2009年第3期309-314,共6页高技术通讯（英文版）

基　　金：supported by the National Nature Science Foundation of China(No.60674009);the High Technology Research and Development Programme of China(No.2006AA01Z270)

摘　　要：Within a wireless opportunistic network,one of the lucky users gets an opportunity to utilize thewhole radio resource.However some of the unlucky users keep silent during an unexpected period result-ing from severe wireless environment and imperfect scheduling algorithms .An opportunistic cooperationprotocol is proposed that can achieve equivalent performance measured in terms of outage probability,inwhich scheme the opportunistic user helps to relay what need retransmitting indicated by the destinationand selects the appropriate power allocation to pursue fairness.The proposed scheme deploys superposi-tion coding and successive interference cancellation at relay and destination,respectively .To improve thespectral efficiency,the modified cooperation architecture involves two opportunistic users which work inturn.The simulation results demonstrate that the protocol obtains better performance compared with theconventional methods.Within a wireless opportunistic network, one of the lucky users gets an opportunity to utilize the whole radio resource. However some of the unlucky users keep silent during an unexpected period result- ing from severe wireless environment and imperfect scheduling algorithms. An opportunistic cooperation protocol is proposed that can achieve equivalent performance measured in terms of outage probability, in which scheme the opportunistic user helps to relay what need retransmitting indicated by the destination and selects the appropriate power allocation to pursue fairness. The proposed scheme deploys superposi- tion coding and successive interference cancellation at relay and destination, respectively. To improve the spectral efficiency, the modified cooperation architecture involves two opportunistic users which work in turn. The simulation results demonstrate that the protocol obtains better performance compared with the conventional methods.

关 键 词：opportunistic communication cooperation diversity FAIRNESS superposition coding 

分 类 号：TN92[电子电信—通信与信息系统]