DocumentCode :
3248012
Title :
Cooperation diversity in multihop wireless networks using opportunistic driven multiple access
Author :
Scutari, G. ; Barbarossa, S. ; Ludovici, D.
Author_Institution :
INFOCOM Dept., Rome Univ., Italy
fYear :
2003
fDate :
15-18 June 2003
Firstpage :
170
Lastpage :
174
Abstract :
Cooperation among users in a multihop wireless network adds diversity to the system and thus it allows the overall transmit power to be reduced. However, cooperation requires signaling among users and this reduces the overall rate gain. We provide the optimal coding strategy for meshed wireless networks, where more links are active simultaneously, assuming as optimality criterion the rates of all the links. This is a multi-objective optimization problem that has interesting applications in multihop and ad-hoc networks. We evaluate the optimal codes in closed form for the case where there are two pairs of users acting simultaneously and we provide an iterative algorithm for the general case. Then we evaluate the loss, in terms of information rate, resulting from simultaneous cooperation.
Keywords :
ad hoc networks; diversity reception; encoding; game theory; iterative methods; multi-access systems; optimisation; ad-hoc networks; cooperation diversity; game theoretic formulation; iterative algorithm; meshed wireless networks; multi-objective optimization; multihop wireless networks; opportunistic driven multiple access; optimal coding strategy; signaling; Base stations; Information rates; Intelligent networks; Iterative algorithms; MIMO; Relays; Spread spectrum communication; Transmitting antennas; Wireless mesh networks; Wireless networks;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing Advances in Wireless Communications, 2003. SPAWC 2003. 4th IEEE Workshop on
Print_ISBN :
0-7803-7858-X
Type :
conf
DOI :
10.1109/SPAWC.2003.1318944
Filename :
1318944
Link To Document :
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