【摘要】 多信道无线网状网的性能在很大程度上依赖于信道分配和路由选择。现有的多信道无线网状网路由大多没有考虑信道之间的干扰问题,从而导致通信性能下降。针对这一问题,提出一种基于探测的多信道无线网状网机会路由(POR)算法。首先,根据干扰能量,选出最佳通信信道集来降低信道间的传输干扰。在此基础上,采用探测方式计算路径期望传输时延,确定候选链路集并运用机会路由机制进行数据传输以最小化端到端的传输时延。实验结果表明,POR可以显著地降低平均端到端时延,提高数据包投递率,为数据传输提供实时性和可靠性保证。更多还原

【Abstract】 The performance of multi-channel wireless mesh networks mainly depends on channel assignment and routing.Most existing routings for multi-channel wireless mesh networks do not consider the problem of interference between channels,resulting in degradation of communication performance.To address this problem,this paper proposed a probing-based opportunistic routing(POR)for multi-channel wireless mesh networks.At first,the set of the best communication channels was selected,reducing the interference.On this basis,the detection method was used to calculate the expected end-to-end delay and choose the set of candidate links.At last,we used opportunistic routing mechanism for transmission to minimize the end-to-end delay.Our simulation results demonstrate that the proposed POR can reduce end-to-end delay significantly,improve delivery ratio,and provide real-time and reliability guarantee for data transmission.更多还原