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A Mobility Supporting MAC Protocol to Improve Handover Performance in IEEE 802.16j Multi-hop Relay Networks  

Yang, Hyeon-Chae (이화여자대학교 컴퓨터 정보통신공학과)
Lee, Mee-Jeong (이화여자대학교 컴퓨터 정보통신공학과)
Publication Information
Journal of KIISE:Information Networking / v.35, no.5, 2008 , pp. 437-452 More about this Journal
Abstract
IEEE 802.16j MR networks introduce RSs (Relay Stations) within the IEEE 802.16 system in order to enhance the data throughput and extend the coverage. However, the current standardization defines that the BS (Base Station) controls MS's (Mobile Station's) handover, not only it induces the large signaling overhead but also handover latency could increase. In this paper, we propose a handover protocol in the MR networks where the high capability RSs that can process the MS's control functions are deployed. First, we classify the handover scenarios for the MR networks with the high capability RSs. Then, we define the MAC handover procedure, corresponding MAC management messages and the transmission routes for the proposed messages so that an 802.16e MS can perform seamless handover without noticing it is attached to an MR network. The simulation results show that the proposed handover protocol not only reduces the MAC management message overhead transferred through the wireless links compared to IEEE 802.16j/D1, which is the current standard for MR networks, but also performs the rapider and more secure MS handover than IEEE 802.16e and IEEE 802.16j/D1.
Keywords
IEEE 802.16j; Multi-hop Relay; Handover; Mobility;
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