Abstract: DYMO is a dynamic on-demand routing protocol in mobile ad hoc networks, which is a singlcpath routing protocol. But multi-path routing can support QoS better than single-path routing. Firstly, the advantages and problems of DYMO protocol were analyzed. Then a novel QoS-aware multi-path DYMO routing protocol(QA-DYMO) was proposed to provide QoS and multi path routing which establishes and utilizes multiple routes of link-disjoint paths to send data packets concurrently. Finally, a QoS-aware routing algorithm was proposed. QA-DYMO can adapt to the dynamic changes of the network and support QoS better. The simulation results show that the proposed protocol outperforms other pertinent protocols.

Key words: Ad hoc network,DYMO,Multi-path routing,QoS