Mesh网的可靠性评价方法研究

Research on reliability evaluation method in Mesh networks

为了对固定无线Mesh网中可用路径多样性带来的可靠性进行评价,将有线网络可靠性算法和无线网络传输模型结合,提出一种Mesh网终端对可靠性计算方法.能够计算出全部链路和节点的故障率,以及基于多跳/多路径链路的性能计算出用户站和基站间链路的总故障率.实验结果表明:能够有效地评价Mesh用户站群与基站连接的可靠性,提高了网络节点选择到基站最可靠通路和避开网络中较差链路,以及在更可靠的链路上获得更低的误码率的能力.

In order to evaluate the reliability obtained through the available path diversity in fixed wireless mesh networks, the reliability algorithms for wired networks along with transmission models for wireless networks are combined. And a method to calculate the terminal-pair reliability in mesh networks is brought forward. Methods are shown for calculating the outage probabilities for all links and nodes in the network as well as for calculating the overall outage probability of the link between a SS（subscriber station） and the BS（base station） based on the multihop/multipath link capabilities of a mesh network. The experiment results show that the reliability of the connection between mesh subscriber station and the base station can be effectively evaluated. For mesh node, the capability of choosing a most reliable path to the BS, avoiding poor links in thenetwork and achieving lower BERs（bit error rate） on more reliable links is improved.