Abstract: SMR is a DSRbased multipath routing algorithm. This algorithm itself has obvious limitations. First, when there is a number of unrelated multi-path routings, it may be choose two related multi-path routing as the last main route and backup route. The second, when the destination node receives a RREQ packet, it is only generated a main routing, but there are many routes actually. To the limitations of SMR algorithm, this paper proposes ISMR algorithm that improves SMR algorithm, ISMR algorithm improvements to ensure the formation of two routes, and to ensure that in the case of a number of unrelated multi-path routings, it would generate two unrelated multi-path routings.

Key words: Ad Hoc network, multi-path, SMR algorithm