Handover Ranging Power Adjustment Using Uplink Channel Information in IEEE 802.16e/m

ETRI Journal

关键词: IEEE 80216e;    uplink;    ranging power;    Handover;   

Others  :  1185906
DOI  :  10.4218/etrij.10.0210.0161

【 摘 要 】

This letter proposes a handover ranging power adjustment scheme to improve handover performance. Incorrect ranging power can degrade handover performance due to the increased handover latency; therefore, the proposed scheme exploits the uplink channel information to adjust the uplink handover ranging power. Simulation results demonstrate that the proposed scheme reduces call outage probability by 33% compared to that of the conventional scheme. It also improves the number of users who satisfy the system requirements for handover interruption time.

   

【 参考文献 】

• [1]IEEE Std. 802.16e™-2005, "IEEE Standard for Local and Metropolitan Area Networks, Part 16: Air Interface for Fixed Broadband Wireless Access Systems, Amendment 2: Physical and Medium Access Control Layers for Combined Fixed and Mobile Operation in Licensed Bands and Corrigendum 1," Feb. 2006.
• [2]D.H. Lee, K. Kyamaka, and J.P. Umondi, "Fast Handover Algorithm for IEEE 802.16e Broadband Wireless Access System," Proc.1st Int. ISWPC, Phuket, Thailand, Jan. 2006.
• [3]H. Fattah and H. Alnuweiri, "A New Handover Mechanism for IEEE 802.16e Wireless Networks," IWCMC, Aug. 2008, pp. 661-665.
• [4]S. Cho et al., "Hard Handoff Scheme Exploiting Uplink and Downlink Signals in IEEE 802.16e Systems," VTC, Sept. 2006, pp.1236-1240.
• [5]Attar et al., Handover Mechanism that Exploits Uplink Channel Quality of a Target Cell, PCT/US2008/05760, to QUALCOMM Incorporated, Sept. 2008.
• [6]WiMAX System Evaluation Methodology, V1.0, Jan., 2007, WiMAX Forum.