Multiuser receiver aware multicast protocols for wireless ad-hoc networks

Authors:
Parameswaran Ramanathan;Kuang-Ching Wang
Affiliations:
Department of ECE, University of WisconsinMadison, Madison, WI;Department of ECE, University of WisconsinMadison, Madison, WI
Venue:
MobiHoc '01 Proceedings of the 2nd ACM international symposium on Mobile ad hoc networking & computing
Year:
2001

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Abstract

Most existing multicast protocols for wireless ad-hoc networks operate at the network layer and make no assumption about the underlying link and physical layer protocols. This results in inefficiency in the usage of bandwidth and power. In this paper, we assume a DS-CDMA based wireless ad-hoc network and propose two schemes, Centralized-Tree Distributed-Power (CTDP) and Distributed-Tree Distributed-Power (DTDP), tailored to the link and physical layer protocols. Both schemes seek to construct a multicast tree and determine the power levels at which the nodes should transmit to satisfy the SINR requirements of all receiving nodes with the least total transmit power. Empirical evaluation shows that CTDP is more efficient than DTDP in terms of consumed transmit power but at significantly higher computation cost. On the other hand, DTDP is fully distributed and thus may be better suited for mobile wireless ad-hoc networks.