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A Handover Mechanism for QoS Guarantee in WiBro  

Yeom Hong-Ju (LG전자 MC사업본부)
Kim Hwa-Sung (광운대학교 전자통신공학과 네트워크 컴퓨팅 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.7A, 2006 , pp. 659-665 More about this Journal
Abstract
When using the Mobile IP which is the representative technology to secure the mobility in general IP networks, the packet loss during the handover is inescapable. To remedy the packet loss problem, the smooth handover was introduced. However, the smooth handover causes the packets sequence disruption during the packet forwarding procedure and it may result in the degradation of the network performance. The same problem also occurs in the WiBro (High-speed Portable Internet) system that is the next generation portable IP service system. The WiBro system, which provides the high speed data service just like xDSL and leased line in wired internet, aims to guarantee the portability, mobility, and the differentiated service based on IEEE 802.16. So, the handover mechanisms that solve the problems of packet loss and packet sequence distribution are required in the WiBro system. In this paper, we propose the handover mechanism and the packet sequence control algorithm that provide the reliability and the differentiated service for the unicast service in the WiBro system.
Keywords
WiBro; Handover; Packet loss; Out-of-sequence; QoS;
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