Destination-Aware Connection Assignment Strategies Based on Group Handoff Support in IEEE 802.16j V-to-I Networks

• Main Authors: Hsiang-Yi Tseng, 曾祥頤
• Other Authors: 張志勇
• Format: Others
• Language: en_US
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/57605763803124186960

碩士 === 淡江大學 === 資訊工程學系碩士在職專班 === 96 === The IEEE 802.16 technology is characterized by broadband access, guaranteed QoS as well as enhanced coverage. The IEEE 802.16e further supports mobile users to access the Internet in the network region. To extend the coverage or enhance the data transmission rate, the IEEE 802.16j enables the operation of multi-hop relay stations. A group of mobile MS can therefore connect to a mobile RS to alleviate or even remove the handoffs between mobile stations and base station. Handoff operation usually takes time and consumes bandwidth and hence raises the problems of delay and call dropping. Though some study proposed novel handoff mechanisms to reduce the handoff delay, none of them aims at reducing the number of handoffs. This thesis considers the group handoff functionality supported in IEEE 802.16j and intends to develop connection assignment strategies between MSs and mobile RSs in a vehicular network. The proposed connection assignment strategies take into consideration several critical metrics including the signal strength, connection duration, common segment as well as relative speed between MSs and RSs. Performance study reveals that the proposed strategies significantly reduce the number of handoffs and hence improve performance in terms of bandwidth utilization and network throughput.