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Multipath video transport over ad hoc networks

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5 Author(s)
Shiwen Mao ; Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA ; Shunan Lin ; Yao Wang ; Panwar, S.S.
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Real-time multimedia transport has stringent bandwidth, delay, and loss requirements. It is a great challenge to support such applications in wireless ad hoc networks, which are characterized by frequent link failures and congestion. Using multiple paths in parallel for a real-time multimedia session (called multipath transport) provides a new degree of freedom in designing robust multimedia transport systems. In this article, we describe a framework for multipath video transport over wireless ad hoc networks, and examine its essential components, including multistream video coding, multipath routing, and transport mechanisms. We illustrate by three representative examples how to extend existing video coding schemes in order to fully explore the potential of multipath transport. We also examine important mechanisms in different layers for supporting multipath video transport over ad hoc networks. Our experiments show that multipath transport is a promising technique for efficient video communications over ad hoc networks.

Published in:

Wireless Communications, IEEE  (Volume:12 ,  Issue: 4 )