对协作系统自适应角色选择策略的思考  

Adaptive Role Selection for Cooperative Communication

作　　者：葛建华[1] 丁海洋[2] 许唐雯[2] 

机构地区：[1]西安电子科技大学,陕西西安710071 [2]解放军西安通信学院,陕西西安710106

出　　处：《中兴通讯技术》2013年第4期46-48,共3页ZTE Technology Journal

基　　金：国家重点实验室开放课题(ISN12-14)

摘　　要：在传统协作系统基础上提出了一种新颖的自适应协作方式——机会角色选择协作。为进一步说明该策略,构建了一种最基本的两用户机会协作框架,其中两个用户相互竞争将各自信息发送给同一目的端。根据瞬时信道条件,两用户均可以机会地充当信息源角色,而另一用户将作为放大转发中继来为信源服务。同时,在此基础上提出并简要描述了一种最优的中心化角色选择策略(C-ROSE)。该策略能够最大化目的端接收信噪比(SNR),进而提高系统传输性能。研究表明,通过这种动态、灵活、高效的节点角色分配方式,协作系统的传输可靠性可得到进一步增强,从而为构建稳固、高效、互惠的协作传输体系开辟了新道路。This paper describes an adaptive cooperative technique and opportunistic role-selection scheme based on a traditional cooperative scheme. We create an opportunistic cooperative framework where two users compete to transmit their own information to a common destination. Depending on the instantaneous channel conditions, either of the users can be the information source and the other user is an amplify-and-forward relay. To reduce the likelihood of system outages, an optimal centralized role selection scheme called C-ROSE is proposed. This scheme maximizes the received signal-to-noise ratio at the destination. Our dynamic, flexible role-selection scheme can ameliorate transmission reliability in order to create an effective cooperative communication system.

关 键 词：协作通信 中断概率 角色选择 

分 类 号：TN929.5[电子电信—通信与信息系统]