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Sixth IEEE International Symposium on a World of Wireless Mobile and Multimedia Networks (WoWMoM'05)
Exploiting Path Diversity in the Link Layer in Wireless Ad Hoc Networks
Taormina - Giardini Naxos, Italy
June 13-June 16
ISBN: 0-7695-2342-0
Shweta Jain, State University of New York at Stony Brook
Samir R. Das, State University of New York at Stony Brook
We develop an anycast mechanism at the link layer for wireless ad hoc networks. The goal is to exploit path diversity in the link layer by choosing the best next hop to forward packets when multiple next hop choices are available. Such choices can come from a multipath routing protocol, for example. This technique can reduce transmission retries and packet drop probabilities in the face of channel fading. We develop an anycast extension of the IEEE 802.11 MAC layer based on this idea. We implement the protocol in an experimental proof-of-concept testbed using the Berkeley motes platform and S-MAC protocol stack. We also implement it in the popular ns-2 simulator and experiment with the AOMDV multipath routing protocol and Ricean fading channels. We show that anycast performs significantly better than 802.11 in terms of packet delivery, particularly when the path length is large or fading is substantial.
Citation:
Shweta Jain, Samir R. Das, "Exploiting Path Diversity in the Link Layer in Wireless Ad Hoc Networks," wowmom, vol. 1, pp.22-30, Sixth IEEE International Symposium on a World of Wireless Mobile and Multimedia Networks (WoWMoM'05), 2005
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