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Fast Handovers: Implementation Experience

Fast Handovers: Implementation Experience. Rajeev Koodli and Vijay Devarapalli. Experimental Testbed. Linux MN with MIPL implementation from HUT FreeBSD-derived router IEEE 802.11b Correspondent Node sends packets using ON-OFF source model

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Fast Handovers: Implementation Experience

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  1. Fast Handovers: Implementation Experience Rajeev Koodli and Vijay Devarapalli

  2. Experimental Testbed • Linux MN with MIPL implementation from HUT • FreeBSD-derived router • IEEE 802.11b • Correspondent Node sends packets using ON-OFF source model • A ‘voice’ packet (of size 24 bytes) every 20ms during ‘talkspurt’ • Vary the mean of ON period to control talkspurt duration

  3. ON (talkspurt) OFF (silence) Handover occurrences

  4. Session start-up vs Session Continuity • Address resolution delay trades off with inter-packet arrival delay • For new sessions, connection (session) start up signaling is followed by slow start (TCP), ‘jump start’ (UDP/RTP) • No packet burst along-with session start up signaling • For handover sessions, there is an existing stream at a certain rate • Packets arrive without “heads up” signaling • ND queue typically small to accommodate a burst indistinguishable from session start-up signaling • Lost NS is harmful

  5. Some experimental data

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