Interference on Multipath QoS Routing for Ad Hoc Wireless Network

  • Authors:
  • Ying-Hong Wang;Hung-Zu Lin;Shu-Min Chang

  • Affiliations:
  • -;-;-

  • Venue:
  • ICDCSW '04 Proceedings of the 24th International Conference on Distributed Computing Systems Workshops - W7: EC (ICDCSW'04) - Volume 7
  • Year:
  • 2004

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Abstract

Mobile nodes are interconnected by multihop routingpaths consist of unstable radio links in ad hoc wirelessnetwork. It is complex and difficult to provide QoSrouting in such network because of imprecise networkinformation, insufficient bandwidth and dynamictopology. For improving network stability and totalthroughput, multiple paths routing protocols areproposed. A sender will discover multiple disjoinedrouting paths and dispatch traffic into them according totheir bandwidth or delay. For multimedia applications,unstable network throughput or insufficient bandwidthwill invite delay or jitter when multimedia presentation.Allocating and reserving enough bandwidth, andpreserving stable network throughput, are important andcomplicated issues in ad hoc wireless multimedianetwork. Some multipath protocols pre-evaluate availablebandwidth paths and select enough total bandwidth if theapplication asks for QoS constraint. These disjoinedpaths with smaller hop-counts are general too closed witheach other if we try to minimize the network cost.Furthermore, the total bandwidth of those paths cannotjust be sum up because of "interference". Discoveringand selecting multiple high-interfering paths is ineffectualthrough the total bandwidth is not precise. In this paper,we discuss the "available bandwidth", network capacityand "interference" according to different Media AccessControl (MAC) protocols. A concept of "Interferingratio" of multipath will be discussed and a simulationwill show the properties of multipath interfering.