Efficient Handover Scheme of Proxy Mobile IPv6 in Wireless Local Area Networks

The IEEE 802.11 based WLAN is widely used because of its low cost and high data rate not only in a small office but also in a public hot spot. To support IP mobility of a mobile node in WLAN the mobile node should have a complicated Mobile IP function in its protocol stack if conventional host-based management protocol such as MIPv6 is used. In this paper we propose an efficient hand over scheme of PMIPv6 in WLAN without changing of protocol stack in an IEEE 802.11 based mobile node. Simultaneous L2 and L3 handover scheme is introduced and modified message in Neighbour Detection procedure is used for handover management. Also analytical model for handover latency is developed and evaluation of proposed scheme against conventional protocols is illustrated. The analysis result shows that the proposed scheme reduces handover latency and number of packet lost.