An Empirical Analysis of the IEEE 802.11 MAC Layer Handoff Process Dept of Computer Science University of Maryland College Park, MD, USA Arunesh Mishra Dept of Computer Science University of Maryland College Park, MD, USA Minho Shin Dept of Computer Science University of Maryland College Park, MD, USA William Arbaugh arunesh@cs.umd.edu ABSTRACT mhshin@cs.umd.edu waa@cs.umd.edu IEEE 802.11 based wireless networks have seen rapid growth and deployment in the recent years. Critical to the 802.11 MAC operation, is the hando function which occurs when a mobile node moves its association from one access point to another. In this paper, we present an empirical study of this hando process at the link layer, with a detailed breakup of the latency into various components. In particular, we show that a MAC layer function - probe is the primary contributor to the overall hando latency. In our study, we observe that the latency is signi cant enough to a ect the quality of service for many applications (or network connections). Further we nd variations in the latency from one hando to another as well as with APs and STAs used from di erent vendors. Finally, we discuss optimizations
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An empirical analysis of the IEEE 802.11 MAC layer handoff process
Mishra, Arunesh; Shin, Minho; Arbaugh, William
Follow ACM SIGCOMM Computer Communication Review
, Volume 33 (2)
Association for Computing Machinery – Apr 1, 2003
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