无线非对称中继网络的统计QoS保证  

Statistic Guarantees of QoS in Wireless Asymmetric Relay Networks

作　　者：廖勇[1,2] 杨士中[1] 彭小秦[1] 杨宏[1] 张磊[3] 

机构地区：[1]重庆大学飞行器测控与通信教育部重点实验室,重庆400044 [2]西安电子科技大学综合业务网理论及关键技术国家重点实验室,西安710071 [3]重庆大学通信工程学院,重庆400044

出　　处：《北京邮电大学学报》2012年第4期51-54,共4页Journal of Beijing University of Posts and Telecommunications

基　　金：西安电子科技大学综合业务网理论及关键技术国家重点实验室开放基金项目(ISN13-11)

摘　　要：针对目前中继网络动态资源分配最优解尚不完善的问题,通过将信息论和有效容量有机地结合,独立求解出估计转发(EF)中继网络动态资源分配的最优解,并以典型网络为例,基于动态资源分配提出了一种自适应中继网络方案,可以根据系统QoS指数要求在现有放大转发(AF)、解码转发(DF)和估计转发(EF)3种中继协议中进行动态选择.数值与仿真分析表明,动态资源分配方案可以很好地在给定系统QoS指数限制下最大化中继网络的有效容量,同时自适应中继网络方案比传统的单一中继方案能更好地提高系统的吞吐量.Aiming that the optimal solution of dynamic resource allocation in relay networks is still incom- plete, and combining the information theory with effective capacity, an optimal solution of dynamic re- source allocation in estimate-and-forward （EF） relay networks is given independently. Moreover, setting the typical network as an example, a self-adaptive relay networks scheme based on dynamic resource allo- cation is put forward. A dynamic choice can be availed within three relay protocols, that can be depicted as amplify-and-forward （AF） , decode-and-forward （DF） and EF according to the system QoS exponent requirement. Numerical simulation indicates that the dynamic resource allocation scheme can effectively maximize the effective capacity of relay networks under the limitation of system QoS exponent. Further- more, the self-adaptive relay network scheme can improve a much better throughput performance than the traditional mono-relay scheme.

关 键 词：协同中继网络 服务质量 有效容量 功率分配 凸优化 

分 类 号：TN925[电子电信—通信与信息系统]