Cross-Layer Based QoS Routing (CLBQR) Protocol analysis based on data flow for 802.16 WiMAX Networks

Cross-layer design for quality of service (QoS) in WiMax has attracted much interest in research recently. Such networks are expected to support various types of applications with different and multiple QoS and grade-of-service (GoS) requirements. In order to achieve this, several key technologies spanning all layers, from physical to network layer, have to be exploited and novel algorithms for harmonic and efficient layer interaction must be designed. Unfortunately, most of the existing works on cross-layer design focus on the interaction of up to two layers while the GoS concept in WMNs has been overlooked. The research on traditional cross- layered architecture which has served well for wired networks seems to be inefficient and not suitable for the wireless networks. Most of the cross-layer design proposals for wireless networks involve in exchanging information between multiple layers or between just two layers. In this paper, it is proposed to develop a Cross-Layer Based QoS Routing (CLBQR) Protocol for 802.16 WiMAX Networks. In our protocol, the cross layer routing is based on the routing metrics which includes power, link quality and end-to-end delay. Then the routing is performed by estimating the combined cost value of these metrics. By simulation results,it is shown that the proposed protocol achieves higher packet delivery ratio with reduced energy consumption and delay.