Title: Fast Uncontrolled Handover scheme for WiMAX: infrastructure networks

Authors: Yu-Hsiang Lin, Po-Wen Chi, Ching-Lun Lin, Wei-Chih Lin

Addresses: NetLab Department of Computer Science, National Chiao-Tung University, 1001 University Road, Hsinchu, Taiwan 300, ROC. ' WiMAX Center, Networks and Multimedia Institute, Institute for Information Industry, 11F, No. 106, Section 2, Heping East Road, Taipei, Taiwan, ROC. ' WiMAX Center, Networks and Multimedia Institute, Institute for Information Industry, 11F, No. 106, Section 2, Heping East Road, Taipei, Taiwan, ROC. ' WiMAX Center, Networks and Multimedia Institute, Institute for Information Industry, 11F, No. 106, Section 2, Heping East Road, Taipei, Taiwan, ROC

Abstract: Worldwide interoperability for microwave access (WiMAX) is a wireless WAN technology with high data rate and is a candidate for the 4G network trying to provide users with mobile service. To alleviate frame loss during handover, WiMAX provides the Uncontrolled Handover for this potential problem. However, in the Uncontrolled Handover, the target Base Station (BS) needs to retrieve the information of Mobile Station from the Serving BS and the authenticator, respectively. To make matters worse, the MAC context retrieval, the AK context retrieval and the DP registration procedure are performed one after another. Therefore, the latency of the Uncontrolled Handover may be very large and may not meet the QoS requirement of some ongoing delay-sensitive services. In this paper, we propose a fast Uncontrolled Handover scheme that can minimise handover messages and accelerate handover procedure. The performance analysis shows that our scheme outperforms the NWG 1.0.0 and NWG 1.2 in average transmission delay. Besides, our scheme is compatible with the NWG specification.

Keywords: WiMAX; context function; fast uncontrolled handover; infrastructure networks; mobile services; m-services; frame loss; latency; NWG specification; worldwide interoperability; microwave access.

DOI: 10.1504/IJAACS.2011.040985

International Journal of Autonomous and Adaptive Communications Systems, 2011 Vol.4 No.3, pp.237 - 251

Available online: 28 Jun 2011 *

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