无线多跳网络下基于过时信道状态信息的跨层资源分配  

Cross-layer Resource Allocation with Outdated Channel State Information in Wireless Multi-hop Networks

作　　者：冯维[1] 冯穗力[1] 丁跃华[1] 黄鑫[1,2] 

机构地区：[1]华南理工大学电子与信息学院,广州510640 [2]华南师范大学物理与电信工程学院,广州510006

出　　处：《电子与信息学报》2014年第11期2750-2755,共6页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61340035);广州市科技计划项目(2014J 4100246)资助课题

摘　　要：对于无线多跳网络跨层资源分配算法的研究大多是建立在假定每个节点能获得网络中其他节点的完美的信道状态信息(CSI)的基础上。但是由于信道的时变特性和CSI的反馈延时,在动态变化较快的无线网络中,节点所获得的CSI很可能是过时或者部分过时的。基于这个前提,该文首次在动态无线多跳网络跨层资源优化分配算法中考虑了CSI这种变化的影响,并提出了一种相应的分布式联合拥塞控制和功率分配算法。仿真结果证明该算法能够极大地提高网络效用和能量效用。Most of the existing works on the cross-layer design of dynamic resource allocation in wireless multi-hop networks assume that every node can avail perfect Channel State Information （CSI） of other nodes in the networks. However, because of the channel fluctuations and the feedback delay, the availed CSI is usually outdated or partly outdated in a dynamic wireless network. In this paper, the impact of outdated channel information is firstly investigated in wireless multi-hop network, and a distributed joint congestion control and power control algorithm with outdated CSI is proposed. The simulation results demonstrate that the proposed algorithm significantly improves network efficiency and energy efficiency of the multi-hop networks.

关 键 词：无线多跳网络 信道状态信息 动态跨层资源分配 分布式算法 能量效用 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]