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arXiv 1106.2650cs.GT
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分散并行干扰信道中的Nash均衡

On the Nash Equilibria in Decentralized Parallel Interference Channels

Luca Rose, Samir M. Perlaza, Mérouane Debbah

摘要:

本文将具有2个收发机对的二维分散并行干扰信道建模为非合作静态博弈。每个发射机被假定为是一个完全理性的实体与完整的信息的游戏,旨在最大限度地提高自己的个人频谱效率,通过调整自己的功率分配(PA)向量。分析了两种情况。首先,我们认为发射机可以在两个维度之间分配其发射功率(PA游戏)。其次,我们认为每个发射机被限制为只使用一维(信道选择CS游戏)。在第一种情况下,博弈可能有一个或三个纯策略(PS)NE。然而,PS中的两个或无限多个NE也可能以零概率被观察到。在第二种情况下,PS中总是存在一个或两个NE。我们表明,在这两个游戏中,总是存在一个非零的概率观察到一个以上的NE。更有趣的是,使用蒙特卡罗模拟,我们表明,在CS游戏中的任何NE的最高和最低的网络频谱效率总是高于在PA。

英文摘要:

In this paper, the 2-dimensional decentralized parallel interference channel (IC) with 2 transmitter-receiver pairs is modelled as a non-cooperative static game. Each transmitter is assumed to be a fully rational entity with complete information on the game, aiming to maximize its own individual spectral efficiency by tuning its own power allocation (PA) vector. Two scenarios are analysed. First, we consider that transmitters can split their transmit power between both dimensions (PA game). Second, we consider that each transmitter is limited to use only one dimension (channel selection CS game). In the first scenario, the game might have either one or three NE in pure strategies (PS). However, two or infinitely many NE in PS might also be observed with zero probability. In the second scenario, there always exists either one or two NE in PS. We show that in both games there always exists a non-zero probability of observing more than one NE. More interestingly, using Monte-Carlo simulations, we show that the highest and lowest network spectral efficiency at any of the NE in the CS game are always higher than the ones in the PA.

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