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Adaptive Cooperative Multi-hop Transmission in Ad Hoc Networks

Authors:
Wasimon Panichpattanakul
Beatrice Paillassa
Benoit Escrig
Daniel Roviras

Keywords: cooperation; cooperative transmissions; IEEE 802.11

Abstract:
Cooperative communication techniques have been proposed in order to improve the quality of the received signals at the receivers by using the diversity added by duplication of signals sent by relay terminals situating between each transmission pair. This paper proposes an adaptive cooperation technique for frame transmissions in Ad Hoc networks that is compatible to both of the basic access mode and the optional access mode of IEEE 802.11 Medium Access Control (MAC) protocol. The transmission mode for each data frame is adaptively switched between a cooperative mode and a non-cooperative mode based on the absence of acknowledge (ACK) frame. Simulations show that transmission performance is improved by decreasing the number of re-transmissions due to frame errors; thus, chances of multi-hop mode transitions that are costly in time and bandwidth are alleviated. The analysis of the proposition performance indicates the interest of the adaptation paradigm. It puts forward that, in addition to the channel quality parameter, the channel availability parameter must be concerned in the adaptation process.

Pages: 21 to 26

Copyright: Copyright (c) IARIA, 2010

Publication date: November 21, 2010

Published in: conference

ISSN: 2308-4146

ISBN: 978-1-61208-109-0

Location: Lisbon, Portugal

Dates: from November 21, 2010 to November 26, 2010