Energy efficient cooperative communications using coalition formation games
Energy efficient cooperative communications using coalition formation games
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DOI：
10.1016/j.comnet.2013.10.007
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
Hung-Quoc Lai;Yan Chen;K. Liu
中科院分区：
文献类型：
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作者：
Hung-Quoc Lai;Yan Chen;K. Liu
众所周知，网络中的单个节点采用协作通信彼此协作可以导致传输功率节省。然而，由于额外的处理能力，在接收和转发其他的信息，并不是所有的节点和合作协议可以实现能源效率。为了保证协作网络的能量效率，提出了一种新的合并过程，该过程包括传输请求阶段、合并阶段和协作传输阶段，采用联盟形成博弈。其目标是找到一种良好的协作结构，使协作组中的各个节点能够实现各自的能量效率，从而实现协作网络的能量效率。将合并过程应用于一个协作通信协议，即无线网络共播（WNC），以证明和验证其有效性。仿真结果表明，对于相同的网络设置，合作传输网络可以需要3.3倍的总功率，占传输和处理功率，比直接传输网络，以提供相当的服务质量。网络维度越大，协作传输相对于直接传输的功率节省越大。此外，合作网络实现了均衡的功率分配，这有助于提高网络的生命周期。仿真结果表明，与联盟形成博弈中的迭代合并-分裂过程相比，迭代合并-分裂过程只适用于小规模网络，而本文提出的合并过程在大规模网络中具有更大的优势.
It is well-known that a single node in a network cooperates with one another employing cooperative communications can lead to transmission power saving. However, due to the additional processing power in receiving and retransmitting other’s information, not all nodes and cooperative protocols can achieve energy efficiency. To ensure energy efficiency of a cooperative network, a novel merge process, consisting of transmission request stage, merge stage, and cooperative transmission stage, utilizing coalition formation games is proposed. The goal is to find a good cooperation structure, in which individual nodes in cooperative groups can achieve their own energy efficiency, thus resulting in energy efficiency of the cooperative network. The merge process is applied to a cooperative communication protocol, namely wireless network cocast (WNC), to demonstrate and validate its effectiveness. Simulations show that for the same network setting, the cooperative transmission networks can require 3.3 times less total power, accounting for both transmission and processing power, than the direct transmission networks to provide a comparable quality of service. The larger the network dimension is the larger the power saving for cooperative transmission over direct transmission. In addition, the cooperative networks achieve balanced power distribution, which helps improving the network lifetime. Comparing with an iterative merge-and-split process in coalition formation games, the simulations show that the iterative merge-and-split process should be only used in small-size networks while the proposed merge process has much more advantage in large-size networks.