基于资源分配和功率控制的D2D中继选择

为优化蜂窝用户通信与设备直传(D2D)中继通信共存下的同频干扰问题,满足蜂窝用户容量要求,提出了一种基于能效的联合资源分配和功率控制的D2 D中继选择算法.该算法首先对等效D2 D中继链路进行资源分配,减小算法复杂度的同时使得D2 D链路对蜂窝链路产生的干扰最小;然后以资源分配结果和功率控制算法为依据进行中继选择.该方案不仅考虑了D2 D中继链路的能效问题,而且还同时考虑到了对蜂窝链路的干扰问题.通过仿真验证,所提算法不仅能有效提升D2 D中继链路的能效值,同时降低了对蜂窝用户的干扰.

D2D relay selection based on resource allocation and power control

In order to optimize the problem of co-channel interference( CCI) after introducing the device-to-device(D2D) relay communication,and to meet the cellular user capacity requirements,a D2D relay selection algorithm based on energy efficiency combined resource allocation with power control is proposed. Firstly,the algorithm allocates spectral resource to the equivalent D2D relay links,reduces the complexity of the algorithm and minimizes the interference caused by the D2D link to the cellular link,and then selects the relay based on the resource allocation result and the power control algorithm. The scheme considers not only the energy efficiency of the D2D relay link but also the cellular interference problem. Simulation proves that the proposed algorithm can not only improve the energy efficiency of the D2D relay link,but al-so reduce the interference to the cellular users.