无线Mesh网络多路径路由协议的研究

Research on the Multi-Path Routing Protocol in the Wireless Mesh Network

L2MPM路由协议工作在第2层,属于多经路由中的备份路由,但并未考虑主路经与备份路径之间存在链路相交的问题,降低了网络的容错能力。因此,在L2MPM协议的基础上,提出了LD-L2MPM路由协议。该协议通过采用链路不相交策略,在Hello包中添加第一跳和最后一跳字段来确保所选的两条路径是链路不相交。仿真结果表明,与原有协议相比,数据包投递率提高约6%,平均端到端时延降低约5%。

The L2MPM （Layer 2 Mesh Protocol for Mobile） routing protocol works on the second layer which belongs to the backup route in the muhi-path routing, but it does not consider the link intersecting between main and backup path to reduce the tolerance of the network. An LD-L2MPM （LINK_DISJOINT_L2MPM） routing protocol based on L2MPM is proposed in the paper, which adopts the strategy of non-intersecting link that adds the first hop and the last hop to the packet of Hello to ensure that the two paths selected by the protocol are link-disjoint. The sim- ulation results show that the rate of packet delivery increases by about 6%, and the average end-to-end delay reduces by about 5% compared with those of the original routing protocol.