Multipath Routing In Ad Hoc Networks Research

Wireless network was becoming more and more important in the filed of communication science since 1970s. It can be categorized into two: one is center-controlled network such as Wireless Local Area Network, the other is self-organized wireless network with no access points such as Ad Hoc network.Wireless Ad Hoc Network owns some characteristics like self-organization, multi-hop and a frequently-changed topology. The uniqueness of Wireless Ad Hoc Network made it impossible to adopt the technologies utilized in traditional networks. So some new protocols and technologies need to be developed specially for Ad Hoc network on channel access, network security and routing. We focus on the routing protocols and algorithms of Ad Hoc network in this paper, and we chose the multi-path routing techniques as our main research point.In the first part of this paper, we gave a summary of Ad Hoc network, including the definition, characteristics applications and key-technologies of Ad Hoc network.In the second part, we first introduced the backgrounds of the routing protocols for Ad Hoc network. Then some existing routing protocols were compared and researched in features and performance.In the third part, we put forward a new approach to discover available paths, maintain the routing and disseminate the data packets in the multi-path routing. The route discovery algorithm was based on and improved from that of AODV. We maintain the routing through dynamical prediction. The data allocation mechanism was according to the communication capacity of the paths.In the last part, we verified and illustrated the correction of the approach we proposed through our simulation. The results showed out that the new approach didn't cause more routing overhead but performed better than AODVM on metrics of average end-to-end delay end-to-end throughput.