无线局域网中一种支持QoS的协作分集算法  

QoS-aware cooperative diversity protocol for wireless LANs

作　　者：李屹[1] 纪红[1] 

机构地区：[1]北京邮电大学泛网无线通信教育部重点实验室,北京100876

出　　处：《西安电子科技大学学报》2008年第1期162-166,共5页Journal of Xidian University

基　　金：国家自然科学基金资助(60672124);国家863计划项目资助(2007AA01Z221)

摘　　要：研究了无线局域网中发送节点选择协作的时机、方案和效益,提出一种按需协作机制——支持QoS的协作分集算法.该算法规定:仅当源节点直接发送不能达到相应业务所需的最低数据速率时,选择能够满足用户QoS需求的伙伴协作.分析和仿真表明,支持QoS的协作分集算法能避免无条件协作机制中传输出错带来的负面影响,进而显著提高系统的吞吐量.By introducing quality of service（QoS） attributes into cooperative communications, a QoS- aware cooperative diversity protocol is proposed. According to different services, cooperative diversity is invoked only if the minimum data rate required to have a successful transmission cannot be achieved. Based on user-specific QoS requirements, partners are determined catitiously. Analytical and simulation results indicate that the QoS-aware cooperative diversity protocol can avoid the negative effect of error propagation in cooperation and greatly improve the system throughput.

关 键 词：协作分集 服务质量 吞吐量 无线局域网 

分 类 号：TN929.5[电子电信—通信与信息系统]