一种无线多跳网络业务性能跨层优化方法

为满足无线Mesh网络和Ad Hoc网络业务不同性能的要求,提出了一种跨层优化算法,给出了保证业务平均误包率的自适应调制编码的实现方法,并结合信道、冲突、缓冲区和业务要求等分析了业务性能.在此基础上,提出了调节误包率、优化业务吞吐率,并通过加权以满足业务不同吞吐率和延迟要求的优化算法,优化综合了物理层、MAC层、链路层和业务要求的影响.为验证算法的正确性,进行了仿真分析.结果表明,在给定的参数下,与未优化相比,丢包率约减小35.3%,延迟约降低65.6%.

Method of Cross-Layer Performance Optimization in Wireless Multi-hop Networks

In order to meet the different performance requirements of traffics in wireless mesh network and Ad Hoc network,a cross-layer optimization algorithm was proposed.An adaptive modulation and coding method to keep constant average packet error rate was presented,and the performance of traffics was analyzed based on the channel,collision,buffer size and traffic characteristics.An optimization algorithm was given by tuning the packet error rate,optimizing throughputs and a weighted optimization to meet the different requirements of throughouts and delays.This algorithm integrates the parameters of physical layer,media access control layer and link layer and the requirement of traffics.In addition,a simulation was carried out to validate the correctness of the proposed algorithm.The research result shows that the proposed algorithm decreases packet drop rate about 35.3%,and drops delay about 65.6% relative to the fixed packet error rate under the given parameters.