Collision-free operation in wireless ad-hoc networks

Authors:
Jaume Barcelo;Boris Bellalta;Miquel Oliver;Albert Banchs
Affiliations:
Universidad Carlos III de Madrid, Madrid, Spain;Universitat Pompeu Fabra, Barcelona, Catalunya, Spain;Universitat Pompeu Fabra, Barcelona, Catalunya, Spain;Universidad Carlos III de Madrid, Madrid, Spain
Venue:
MACOM'11 Proceedings of the 4th international conference on Multiple access communications
Year:
2011

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Abstract

In some wireless ad-hoc networks it is not possible to rely on carrier-sense mechanisms to prevent collisions. In this article we suggest a MAC protocol that reaches collision-free operation in sparse ad-hoc wireless networks when all the stations are saturated. The basic idea is to use a random backoff after failed transmissions and a deterministic backoff after successful transmissions. Each of the participating stations can configure its own backoff parameter after collecting information from its neighborhood. Then the system enters in a transient state until collision-free operation is reached. We assess the duration of the transient state and other performance metrics for an example scenario and finally we discuss two options to incorporate reception acknowledgements.