Transmission Scheduling and Game Theoretical Power Allocation for Interference Coordination in CoMP

Transmission Scheduling and Game Theoretical Power Allocation for Interference Coordination in CoMP
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CoMP 中干扰协调的传输调度和博弈论功率分配

DOI:
10.1109/twc.2013.120113.121646
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发表时间:
2014
影响因子:
10.4
通讯作者:
Feng Gang
Feng Gang
中科院分区:
计算机科学1区
文献类型:
--
作者:
Fu Shu;Wu Bin;Wen Hong;Ho Pin-Han;Feng Gang

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3GPP LTE-A采用CoMP (Coordinated Multi-Point)技术来提高边缘用户的传输速率。为了最大限度地提高所有边缘用户的下行总吞吐量,关键是要正确确定每个物理资源块(PRB)中同时服务的用户集和每个调度用户的合作基站(BSs),以及BSs的发射功率。基于每个边缘用户的参考信号接收功率(RSRP),首先提出了分布式和集中式两种简单集成的传输调度算法来选择每个PRB中的蜂窝边缘用户和合作BSs。根据调度结果,在每个基站的所有prb上执行经典的注水(WF)算法,以获得初始的单个单元功率分配。考虑到不同合作BS集之间的干扰,我们进一步构造了一个非合作权力分配博弈来调整干扰协调的初始权力分配,其中初始权力分配为每个BS提供了博弈的策略空间。这增加了所有BSs的边缘用户的总下行吞吐量。我们证明了博弈具有唯一的纳什均衡(NE),并设计了一个寻找NE的算法。然后通过广泛的模拟研究证明了性能增益。
In 3GPP LTE-A, Coordinated Multi-Point (CoMP) is adopted to enhance the transmission rates of edge users. To maximize the total downlink throughput of all edge users, it is crucial to properly determine the set of simultaneously served users in each physical resource block (PRB) and the cooperative base stations (BSs) for each scheduled user, as well as the transmit power of the BSs. Based on the reference signal receiving power (RSRP) of each edge user, we first propose two simple and integrated transmission scheduling algorithms, one distributed and the other centralized, to choose cell-edge users and cooperative BSs in each PRB. With the scheduling results, the classic Water-Filling (WF) algorithm is carried out over all PRBs at each BS to get an initial single cell power allocation. To take the interference among different cooperative BS sets into account, we further formulate a non-cooperative power allocation game to adjust the initial power allocation for interference coordination, where the initial power allocation provides the strategy space of the game for each BS. This increases the total downlink throughput of edge users over all BSs. We prove that the game has a unique Nash Equilibrium (NE), and design an algorithm to find the NE. Performance gain is then demonstrated through extensive simulation studies.
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