An adaptive QoS framework for integrated cellular and WLAN networks

Authors:
Xin Gang Wang;Geyong Min;John E. Mellor;Khalid Al-Begain;Lin Guan
Affiliations:
Department of Computing, School of Informatics, University of Bradford, Bradford BD7 1DP, UK;Department of Computing, School of Informatics, University of Bradford, Bradford BD7 1DP, UK;Department of Computing, School of Informatics, University of Bradford, Bradford BD7 1DP, UK;School of Computing, University of Glamorgan, Wales CF37 1DL, UK;Department of Computing, School of Informatics, University of Bradford, Bradford BD7 1DP, UK
Venue:
Computer Networks: The International Journal of Computer and Telecommunications Networking - Wireless IP through integration of wireless LAN and cellular networks
Year:
2005

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Abstract

The design of a network architecture that can efficiently integrate WLAN and cellular networks is a challenging task, particularly when the objective is to make the interoperation between the two networks as seamless and as efficient as possible. To provide end-to-end quality of service (QoS) support is one of the key stages towards such a goal. Due to various constraints, such as the unbalanced capacity of the two systems, handoff from user mobility and unreliable transmission media, end-to-end QoS is difficult to guarantee. In this paper, we propose a generic reservation-based 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 maintaining acceptable QoS to the end users.