基于功率加权的延长网络寿命的机会中继策略  

Opportunistic Relaying Strategy for Prolonging Network Lifetime Based on Power Weighting

作　　者：柯峰[1] 耿恒信[1] 冯穗力[1] 江明 

机构地区：[1]华南理工大学电子与信息学院,广东广州510640 [2]新邮通信设备有限公司,广东广州510663

出　　处：《华南理工大学学报（自然科学版）》2012年第3期37-42,共6页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(61001113)

摘　　要：针对采用解码-转发协议的无线协作中继网络,提出了一种基于功率加权的机会中继策略,即根据每个节点的剩余能量设定其功率的权重因子,每个源节点根据加权能量消耗最小准则选择最优的协作中继,并通过单纯型法得到源节点和中继节点之间的最优功率分配,以提高能量利用率和平衡网络中每个节点的能量消耗.仿真结果表明,与其它策略相比,文中策略可以有效延长整个协作中继网络的寿命.Proposed in this paper is an opportunistic relaying strategy for decoding-and-forwarding wireless cooperative relay networks based on power weighting.In this strategy,the power weight is determined according to the residual energy of each node in the network,and the optimal cooperative relay of each source node is selected accor-ding to the minimum weighted-energy criterion.Moreover,the optimal power allocation between the source node and the relay node is obtained via the simplex method.Thus,the energy utilization is improved and the energy consumption of each node in the network is balanced.Simulated results show that the proposed strategy is superior to other strategies in terms of prolonging the lifetime of cooperative relay networks.

关 键 词：机会中继 解码-转发 中继选择 功率控制 

分 类 号：TN914.5[电子电信—通信与信息系统]