QoS-ASR: an adaptive source routing protocol with QoS support in multihop mobile wireless networks

We focus on one critical issue in mobile ad hoc networks (MANETs) that is quality-of-service (QoS) routing. MANETs are formed by an autonomous collection of mobile nodes constructing dynamic networks and communicating over wireless links. In this context, we propose a novel routing protocol named QoS adaptive source routing protocol (QoS-ASR). It is an adaptive soft-QoS protocol with aggregate flows. It applies the source routing mechanism defined by the dynamic source routing (DSR) unicast protocol to avoid channel overhead and to improve scalability. QoS-ASR handles QoS criteria taking into account application requirements (link transmission delay, available bandwidth, packet loss rate) combined with network state related constraints (battery life, link stability, node congestion state). The performance of the proposed scheme is evaluated via simulations and is compared to DSR.