摘要
针对编码协同网络中的协同节点选择问题,提出了一种速率自适应协同与动态最大化网络生存期相结合的协同节点选择算法(RAC-DPLM).该算法联合考虑了业务期望的传输速率、信道状态信息(CSI)以及剩余能量信息(RSI)对网络生存期进行优化.通过将非线性优化问题转化为线性规划问题,不仅降低了算法的复杂度,而且达到对网络资源的动态分配,进而为不同的业务速率提供QoS保证,并有效地延长了网络生存期.在不同参数下的仿真结果表明:相对于固定协同节点选择算法,该算法在保证业务QoS的前提下,将网络生存期延长了4~6倍.
Partner choice is a basic problem in a coded cooperative network. In this paper, a novel partner choice algorithm (Rate Adaptation Cooperation-Dynamic Protocol for Lifetime Maximization RAC-DPLM) is proposed, which can adapt to the transmission rate and maximize network lifetime efficiently. By considering the expected traffic transmission rate, channel state information (CSI) and residual energy information (REI) together, our scheme aims at optimizing the network lifetime. Furthermore, the complexity of our scheme is reduced by converting the nonlinear program into a linear program. Our scheme is able to allocate the network resource dynamically and guarantee the QoS for different traffic rates, which contributes to the extension of the network lifetime. Simulation results show that the network lifetime is prolonged about 4-6 times compared with the fixed priority selection scheme under QoS constrains.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2010年第1期73-79,共7页
Journal of Xidian University
基金
国家杰出青年科学基金资助项目(60725105)
国家重点基础研究发展计划(973计划)资助项目(2009CB320404)
长江学者和创新团队发展计划资助项目(IRT0852)
863计划课题资助项目(2007AA01Z217)
国家自然科学基金资助项目(60972048)
国家重点实验室专项基金资助项目(ISN01080301)
教育部新世纪优秀人才支持计划资助项目
高等学校创新引智计划资助项目(B08038)
教育部科学技术研究重点项目资助项目(107103)
关键词
编码协同
节点选择
资源分配
网络生存期
服务质量
coded cooperation
partner choice
resource allocation
network lifetime
quality of service