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Stability of transmitter cooperation over a multiple access channel

机译:发射机在多路访问信道上的协作稳定性

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Cooperation between nodes has become increasingly necessary to mitigate interference in modern wireless networks. The question of whether cooperation is fair and stable and whether all rational nodes have a sufficiently large incentive to cooperate is unknown even for simple networks. This paper addresses the stability of cooperation between rational transmitters (TXs) signaling over a multiple access channel (MAC) using the framework of cooperation game theory. Using the sum rate as the utility of each coalition of TXs, the stability of the grand coalition is examined by evaluating the core of the TX game cooperation game in partition form, a game model in which the utility of a coalition depends on TXs external to the coalition. The non-emptiness of the core implies that there exists a feasible division of utility such that no smaller coalition of TXs has an incentive to deviate from the grand coalition. For a single user decoding (SUD) receiver, the cooperation is shown to be stable in the high SNR and low SNR regimes while for a successive interference cancelling (SIC) receiver with fixed decoding order, cooperation is stable only in the low SNR regime.
机译:为了减轻现代无线网络中的干扰,节点之间的协作变得越来越必要。即使对于简单的网络,合作是否公平,稳定以及所有有理节点是否具有足够大的合作动机的问题也是未知的。本文利用合作博弈的理论框架,探讨了多址访问信道(MAC)上的理性发射机(TX)信令之间合作的稳定性。使用总和作为每个TX联盟的效用,通过评估分区形式的TX游戏合作博弈的核心来检验大联盟的稳定性,其中博弈模型的效用取决于TX外部的TX联盟。核心的非空性意味着存在可行的效用划分,以使较小的TX联盟没有动机偏离大联盟。对于单用户解码(SUD)接收器,协作在高SNR和低SNR体制中表现出稳定,而对于具有固定解码顺序的连续干扰消除(SIC)接收器,协作仅在低SNR体制中稳定。

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