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MACA/PR: An Asynchronous Multimedia Multihop Wireless Network


Personal communications and mobile computing will require a wireless network infrastructure which is fast deployable, possibly multihop, and capable of multimedia service support. The first infrastructure of this type was the Packet Radio Network (PRNET). developed in the 70’s to address the battlefield and disaster recovery communication requirements. PRNET was totally asynchronous and was based on a completely distributed architecture. It handled datagram traffic reasonably well, but did not offer eiqicient multimedia support. Recently, under the WAMlS and Glomo ARPA programs several mobile, multimedia, multihop ( M 3 ) wireless network architectures have been developed, which assume some form of synchmnous, time division infrastructure. The synchronous time frame leads to eiqicient multimedia support implementations. However: it introduces more complexity and is less robust in the face of mobility and channel fading. In this paper: we examine the impact of synchronization on wireless M3 network performunce. First, we introduce MACMPR, an asynchronous network based on the collision avoidance MAC scheme employed in the IEEE 802.11 standard. Then, we evaluate and compare several wireless packet networks rangingfrom the total asynchronous PRNET to the synchronized cluster TDMA network. We examine the tradeoffs between time synchronization and performance in various trafic and mobilig environments.

Paper: PDF file of paper

Information & Date

INFOCOM'97., Kobe, Japan, October. 1997


Chunhung Richard Lin
Mario Gerla