论文部分内容阅读
提出了在多信道环境下的无线Mesh网络中的一种混合型路由协议TOIRP(tree-based and on-de-mand integrated routing protocol)以及一种分布式的信道分配算法CLBCA(channel load based channel assign-ment).TOIRP协议采用HWMP(hybrid wireless mesh protocol)所提出的混合路由技术,将基于树的路由与传统的AODV(ad hoc on-demand distance vector)路由相结合,减少路由发现的时延,同时采用了一种新的路由判据CETTI(cumulative expected transmission time with interference).该路由判据充分考虑多信道的特性,设计了一种量化通信干扰的方法,将干扰分为外部数据流对路径的干扰以及路径内部数据流的干扰两个方面,并综合考虑了跳数、时延等因素,提高了网络的吞吐量.信道分配算法分为收发器与邻居节点绑定和收发器与信道绑定两个部分,将信道的负载作为选择信道的标准,避免了多信道中常见的信道依赖所造成的影响,并且提高了信道的利用率.模拟结果表明,采用新的路由判据后,网络的吞吐量最优情况下得到提升.
A hybrid tree-based and on-de-mand integrated routing protocol (WS-TOIRP) and a distributed channel allocation algorithm CLBCA (channel load based channel assignment) are proposed for multi-channel wireless networks. -ment) .TOIRP uses hybrid routing technology proposed by HWMP (hybrid wireless mesh protocol) to combine tree-based routing with traditional AODV (ad hoc on-demand distance vector) routing to reduce the delay of route discovery, A new CETTI (cumulative expected transmission time with interference) is also proposed. This routing criterion fully considers the characteristics of multi-channel and designs a method to quantify the communication interference. The interference is divided into external data stream path And interference of internal data streams in the path, and comprehensively considers the factors such as the number of hops and delay and improves the throughput of the network.A channel allocation algorithm is divided into the following aspects: the transceiver and the neighboring nodes are bound and the transceiver and the channel are tied Set two parts, the channel load as the standard choice of the channel, to avoid the multi-channel common channel dependence of the impact, and improve The utilization rate of the channel.The simulation results show that with the new routing criterion, the throughput of the network is improved under the optimal conditions.