Abstract: Multi-path routing protocol can effectively reduce the probability of communication interrupt and end-to-end delay by establishing and maintaining multiple alternate paths in mobile ad-hoc network. The current analysis methods of the number of alternate paths are unavailable for the complex wireless ad-hoc network transmission environment. The existing multipath routing protocols can’t meet the requirements of mixed services. In order to solve the above-mentioned problems, the models for single-path and multi-path routing protocols are established to analyze the effect of the number of alternate paths on the performance of multi-path routing protocol. An application-oriented ad hoc on-demand multipath distance vector （A-AOMDV) is proposed, in which many parameters, such as hop, average connectivity, minimum bandwidth and so on, are considered, and the best path is selected for any service. The simulated result shows that the delivery rate of data service can be increased by 25% and the average delay of voice service can be reduced by 10%~20% by adjusting the weights of parameters. The proposed protocol can selectively improve the properties of delay, reliability and available bandwidth for different services.

Key words: computer system architecture, mobile ad-hoc network, multi-path routing protocol, A-AOMDV, quality of service