异构蜂窝网络中基于SWIPT的D2D资源分配算法研究

Research on D2D Resource Allocation Algorithm Based on SWIPT in Heterogeneous Cellular Network

  • 摘要: 为了解决异构蜂窝网络中D2D(Device-to-Device)通信干扰导致系统能量效率下降的问题,提出一种基于SWIPT的D2D通信资源分配策略,以实现D2D链路的能量效率最大化。该策略对系统中多种干扰进行建模,构建干扰图和伙伴候选集合;将优化问题转化为功率控制和信道分配两个子问题,运用KKT条件和拉格朗日乘子法,求解D2D链路复用候选集中子信道的最优发射功率和功率分割比。仿真结果表明,所提出的分配策略能明显提升系统的能量效率,在保证服务质量的前提下能有效提高D2D用户接入率。

     

    Abstract: In order to solve the problem of multi-layer interference caused by D2D communication multiplexing channel resources in heterogeneous cellular networks, a D2D communication resource allocation strategy based on simultaneous wireless information and power transfer (SWIPT) is proposed to alleviate the interference in the system and maximize the energy efficiency of the D2D link. Firstly, the various interferences in the system are formulated, an interference graph and a set of partner candidates are constructed. Then, the optimization problem is transformed into two sub-problems of power control and channel allocation, and the KKT condition and the Lagrange multiplier method are used to solve the optimal transmit power and power split ratio of the sub-channels in the candidate set of D2D link multiplexing. The experimental results show that the proposed strategy can effectively improve the energy efficiency of the system and D2D user access rate under the premise of ensuring cellular user QoS.

     

/

返回文章
返回