Fast Handoff Scheme with Accelerated Probe Function in Wireless LANs

L.J. Zhang, S. Pierre (Canada), and L. Zhang (PRC)


Wireless local area network (WLAN), IEEE 802.11, MAC layer handoff, Scan, performance, simulation


This paper proposes a fast MAC layer handoff scheme with accelerated probe function that reduces handoff latency as well as packet losses in wireless LANs. With this approach, a mobile station (MS) can scan a subset of all channels when it moves beyond the radio range of its current associated access point (AP). Performance evaluation is done through simulations, and experimental results indicates that our approach has better performance than the standard IEEE 802.11b and two well-cited handoff schemes: selective scanning plus caching and neighbour graphs, in terms of handoff latency, probe delay and packet losses.

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