A Multi-radio Based on QoS Guarantee Mechanism for Wireless Ad hoc Networks

In order to improve the capacity of wireless Ad hoc networks and satisfy the QoS requirements of multimedia sessions, multi-radio technique is introduced and stateless QoS model in single-interface single-channelSWAN is extended to stateless QoS model in multi-interface multi-channelMMSWAN. At the same time, a multi-interface multi-channel QoS routing protocolMMQAODV is proposed, which is combined with MMSWAN to implement a cross-layer QoS guarantee mechanism. Simulation shows that the mechanism improves QoS of multimedia sessions and performances of best-effort sessions. In comparison with SWAN, end-to-end delay is reduced to its 2%~27% and delivered best-effort data are increased to 1.29~3.55 times of it.