Adaptive QoS Control in Cellular and WLAN Interworking Networks

To provide end-to-end Quality of Service (QoS) support for the integrated WLAN and cellular networks is a challenging task, due to the various constraints, such as the unbalanced capacity of two systems, handoff from users’ mobility and unreliable wireless media. In this paper, we propose a generic reservationbased QoS model for the integrated cellular and WLAN networks. It uses an adaptation mechanism to address the above issues and to support end-to-end QoS. The validity of the proposed scheme is demonstrated via simulation experiments. The performance results reveal that this new scheme can considerably improve the system resource utilization and reduce the call blocking probability and handoff dropping probability of the integrated networks while still maintaining acceptable QoS to the end users.