PROACTIVE HOT-ZONE FLOW CONTROL FOR SEAMLESS STREAM HANDOFF UNDER MOBILE MULTICAST NETWORKS

in National workshop (full text oral presentation), 國內研討會(全文口頭發表)
標題PROACTIVE HOT-ZONE FLOW CONTROL FOR SEAMLESS STREAM HANDOFF UNDER MOBILE MULTICAST NETWORKS
出版類型國內研討會(全文口頭發表)
出版年度2005
AuthorsSheau-Ru Tong, 童曉儒, & S. - H. Y.
出版日期Jul 1 2005 12:0
其他編號0000
中文摘要

This paper considers a scenario of broadcasting stream media over a mobile
multicast networking environment, where a server employs the wired Internet multicast to replicate
and distribute stream media to a set of access points (APs), from which mobile hosts (MHs)
intercept the stream through wireless unicast links. An analytical framework is introduced for
characterizing the traffic dependency between AP and MH by taking into account the issues
impacting the seamless stream handoff (e.g., AP out-of-synch, handoff latency and path-setup
delay). Based on it, a proactive hot-zone flow control scheme is proposed, which employs a simple
threshold-based policy for regulating the traffic flow between AP and MH prior to handoff. The
simulation results reveal that the proposed scheme can significantly reduce the playback hiccups
while consuming limited buffer space, compared with the one without any special attention.
Particularly, deployment of a few-second-video-length buffer in AP and MH is capable of achieving
the seamless stream handoff most of the time subject to fairly loose constraints of the AP synch
error (ranging ±3 sec) and handoff latency (around 1 second).

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