Always Best-Connected QoS integration model for the WLAN, WiMAX Heterogeneous Network

This paper proposes a mechanism that supports always best-connected (ABC) quality of service (QoS) to the application in a heterogeneous network. The heterogeneous network consists of IEEE 802.11e WLAN and IEEE802.16d WiMAX access networks. The user equipment (UE) in the network is enabled with both WLAN and WiMAX access capabilities. The generic virtual link layer (GVLL) is placed above the WLAN and WMAN MAC layer in the UE, decides the best serving access network in terms of QoS support. The best access network is chosen dynamically based on the QoS parameters such as throughput, packet loss, and delay. The main focus of this work is to provide QoS for variable bit rate (VBR) multimedia services in a heterogeneous network. The simulation results show that the performance of the users in the network is improved significantly in terms of throughput, delay, call admission because of the support of heterogeneous nature