多接口多信道无线mesh网中,提出了一种基于信号干扰监测的路由度量机制(ISB)。现有的路由度量机制如WCETT、iAWARE等均存在各自的不足。通过对iAWARE深入分析,发现其并不能正确地反映背景噪声这一重要因素。为此改进了该度量机制,使其更加正确地反映背景噪声,并且具有了等分性,即可以在路由协议中使用如Bellman—Ford或Dijkstra路径计算方法。理论分析和网络仿真表明,新度量机制下的网络性能如网络吞吐量和端到端延迟均优于HopCount、ETT、wCEr丌和iAWARE。
An interference sensing based(ISB) routing metric which mainly depend on the estimation of signal power was introduced for the multi-radio multi-channel wireless mesh networks. The existing metric such like WCETT and iA- WARE all have their drawbacks were shown. As shown in the equations of iAWARE, it could be proved that a worse background noise corresponds to a better metric value which was imprecise. The iAWARE to make it suited for the envi- ronment with background noise was improved, and the isotonic property was regained that the Bellman-Ford and Dijkstra algorithm could be deployed in ISB. The simulation results prove the novel algorithm takes the advantages of higher effi- ciency both in throughput and end to end delays, compared with the traditional ones HopCount, ETT, WCETT and iA- WARE.