移动自组网与Internet互连的AODV协议扩展

Extension of AODV for integrated Internet-MANET

针对移动自组网与Internet互连时网关带宽瓶颈问题,提出将域内有线节点视为移动自组网内部的互连节点的模型。从而把互连问题转化为含有有线节点的移动自组网路由协议的扩展问题,进而提出了支持与Internet互连的AODV扩展协议iAODV(Internet-AODV)。通过结合多个互连节点和扩展AODV路由协议,iAODV把互连节点切换与移动节点之间的路由协议相统一,可以有效缓解互连节点的带宽瓶颈。NS2模拟实验表明,该协议可以为移动自组网提供比较稳定的Internet接入性能,且结合有线链路减小了互连延迟时间和系统开销、提高了包递交率,性能优于AODV。

To solve the bottleneck problem of gateway bandwidth in the integrated internet and mobile Ad hoc network （IIM）, intra-domain gateway may be regarded as a node in mobile Ad hoc network （MANET）. Thus the interconnect problem is turned to the routing protocol extension problem of MANET with wired link. A new routing protocol, Internet-AODV （iAODV）, which is an extension of AODV for IIM, is proposed. Combining internet-connected mobile host （IMH） and expanding the routing protocol, iAODV can unify IMH handoff with mobile node routing operations. This can effectively relieve the bandwidth＇s bottleneck of IMH. According to the NS2 simulation results, the performance of iAODV represents stability in the IIM, and the iAODV express better performance rather than AODV about average end-to-end delay, packet deliver rate and normalized routing load.