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Cooperation and Routing in Multi-Hop Networks Elzbieta Beres and Raviraj Adve

Summary: Cooperation and Routing in Multi-Hop Networks
Elzbieta Beres and Raviraj Adve
Dept. of Elec. and Comp. Eng. University of Toronto
10 King's College Road
Toronto, ON M5S 3G4, Canada
email: {eberes, rsadve}@comm.utoronto.ca
Abstract-- We study the cross-layer problem of combining
routing and cooperative diversity in multi-hop, bandwidth-
constrained, networks with dedicated multiple access. Previous
work in cooperative diversity nearly always assumes cooperation
to be a positive. We show that in a large scale multi-hop network,
cooperation must only be used selectively. Our figure of merit
is achievable data rate between a source and destination at a
fixed probability of outage. We show that enforcing multiple
hops is detrimental to performance, since each extra hop requires
bandwidth expansion. This performance can be significantly im-
proved by incorporating a selective cooperative diversity scheme
on a one-hop link. On the other hand, the simulation results
show that cooperative diversity does not improve performance
over a dynamic routing protocol which searches for the optimal,


Source: Adve, Raviraj - Department of Electrical and Computer Engineering, University of Toronto


Collections: Engineering