Concurrent Transmission Based on Channel Quality in Ad Hoc Networks: A Game Theoretic Approach

Chen CHEN  Xinbo GAO  Xiaoji LI  Qingqi PEI  

IEICE TRANSACTIONS on Information and Systems   Vol.E95-D   No.2   pp.462-471
Publication Date: 2012/02/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.E95.D.462
Print ISSN: 0916-8532
Type of Manuscript: Special Section PAPER (Special Section on Architectures, Protocols, and Applications for the Future Internet)
Ad Hoc networks,  game theory,  Nash Equilibrium Solution,  concurrent transmission,  

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In this paper, a decentralized concurrent transmission strategy in shared channel in Ad Hoc networks is proposed based on game theory. Firstly, a static concurrent transmissions game is used to determine the candidates for transmitting by channel quality threshold and to maximize the overall throughput with consideration of channel quality variation. To achieve NES (Nash Equilibrium Solution), the selfish behaviors of node to attempt to improve the channel gain unilaterally are evaluated. Therefore, this game allows each node to be distributed and to decide whether to transmit concurrently with others or not depending on NES. Secondly, as there are always some nodes with lower channel gain than NES, which are defined as hunger nodes in this paper, a hunger suppression scheme is proposed by adjusting the price function with interferences reservation and forward relay, to fairly give hunger nodes transmission opportunities. Finally, inspired by stock trading, a dynamic concurrent transmission threshold determination scheme is implemented to make the static game practical. Numerical results show that the proposed scheme is feasible to increase concurrent transmission opportunities for active nodes, and at the same time, the number of hunger nodes is greatly reduced with the least increase of threshold by interferences reservation. Also, the good performance on network goodput of the proposed model can be seen from the results.