D2D网络中信道选择与功率控制策略研究

Research on Channel Selection and Power Control Strategy for D2D Networks

针对D2D通信的资源分配问题,该文研究了D2D信道选择与功率控制策略。在保证蜂窝用户服务质量(QoS)的前提下,提出一种基于启发式的D2D信道选择算法,为系统内的D2D用户找到合适的信道复用资源。同时,利用拉格朗日对偶方法求解得到D2D用户最优传输功率。仿真结果表明当蜂窝用户与多对D2D用户共享信道资源时能够大幅度提升系统平均吞吐量。在相同条件下,该算法的性能要明显优于现有算法。

Considering the resource allocation problem for Device-to-Device(D2D)communications,a channel selection and power control strategy for D2D communications is investigated.On the premise of guaranteeing the Quality of Service(QoS)of cellular users,a heuristic based D2D channel selection algorithm is proposed to find the suitable channel reusing resources for D2D users in the system.At the same time,the optimal transmission power of D2D users is obtained by using the Lagrange dual method.Simulation results demonstrate that when the cellular user shares channel resources with multiple pairs of D2D users,the system throughput can be dramatically improved.The performance of this algorithm outperforms the exiting algorithms under the same conditions.