Multipath source routing strategies for video transmission in ad hoc wireless networks

Employing multipath routing with video transmission can improve reliability and end-to-end delay. Many prior works investigate this combination in the scenario of wireless ad hoc networks, considering that at least two paths can be found. Nevertheless, the number of available paths is highly dependable on network topology and density. Thus, link-disjoint paths may not be available at a number large enough for exploring path diversity. A path selection strategy over source routing is proposed that makes the concept of disjointness more flexible, providing the quasi-disjoint paths (QD-paths). In order to compare our scheme with prior work, we also adapt a multipath routing protocol, namely SMR, for using disjoint-paths (D-paths) with a method of greedy path selection and round-robin schedule. Simulation results demonstrate that QD-SMR and D-SMR have much better results than standard SMR. The main result is that QD-paths increase path diversity with low overhead, which improves redundancy.