Game-Theoretic Power and Rate Control in IEEE 802.11p Wireless Networks

被引:1
|
作者
Spyrou, Evangelos D. [1 ]
Vlachos, Evangelos [2 ]
Stylios, Chrysostomos [1 ,2 ]
机构
[1] Univ Ioannina, Dept Informat & Telecommun, Arta 47150, Greece
[2] Athena Res Ctr, Ind Syst Inst, Patras Sci Pk Bldg, Patras 26504, Greece
关键词
utility function; potential game; rate allocation; transmission power; price of stability; DSRC; COMPLEXITY;
D O I
10.3390/electronics11101618
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
Optimization of the transmission power and rate allocation is a significant problem in wireless networks with mobile nodes. Due to mobility, the vehicles establishing wireless networks may exhibit severe fluctuations of their link quality, affecting their connection reliability and throughput. In Vehicular Ad-hoc Networks (VANETS), the IEEE 802.11p standard provides a practical metric for the Packet Reception Ratio (PRR), which is related with the transmission power and rate. Finding a global strategy for optimizing PRR for all mobile nodes can be treated as a potential game where each vehicle is considered as a selfish player, aiming to maximise its transmission reliability while rate constraints are satisfied. To this end, we propose a game-theoretic approach that converges to a Nash equilibrium. The main contributions of this work include: (i) identification of the best case equilibrium, for two cases of interference: diminished or kept stable, and (ii) verification of the equilibrium optimality, by showing that the value of stability is 1. Moreover, numerical results exhibiting the ease of the utility function calculation are provided, especially after an SINR level, whereby the utility function is concave and can be solved efficiently in polynomial time.
引用
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页数:16
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