A Novel Backoff Algorithm with QoS Support in Heterogeneous Wireless Networks
Keywords:
Backoff mechanism, medium access control, WiMAX, WLAN.Abstract
The main objective of the future networks is to
provide users with always best connectivity through available different access networks. Wireless convergence has emerged as a multidimensional concept that combines networks, applications, user interfaces and management, which aimed at supporting voice, data and multimedia over IP-based networks.
In this paper, we model the end-to-end quality of service (QoS) provisioning mechanisms in the wireless local area network (WLAN) and worldwide interoperability for microwave access networks (WiMAX) interworking network. For the end to end QoS guaranteed service, we make changes to multiple access protocol. The media access control (MAC) analysis using hybrid protocol based on virtual slot multiple access (VSMA) with a novel backoff mechanism is extended to the heterogeneous networks and its throughput and delay characteristics are analyzed. By the simulation results, our proposed protocol can provide the low end to end delay and
improved throughput for different traffics, even though the traffic load in the network increases. Especially, the end-to-end delay of the IP based voice is smaller when the QoS parameter mappings are applied to the interworking network.
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