D2D通信中一种基于FFR的动态功率控制方案

doi:10.11959/j.issn.1000-0801.2016216

摘要/Abstract

摘要：

工作在underlay方式下的D2D(device-to-device)通信利用资源复用共享蜂窝网络中的资源，在提高频谱资源利用率、降低移动终端功耗的同时，会给已有蜂窝网络带来干扰。在保证D2D用户和蜂窝用户的服务质量的前提下，研究了蜂窝用户和D2D用户的功率控制和资源分配问题。首先引入部分频率复用(FFR)实现蜂窝用户和D2D用户之间的资源划分和复用；然后以系统吞吐量最大化为原则，建立优化目标。结合部分功率控制(FPC)的基本思想，进而提出了一种动态功率控制(DPC)策略。仿真结果表明，所提出的方案能够有效地提高多小区系统的性能。

关键词: D2D通信, 干扰协调, FFR, 资源分配, FPC

Abstract:

By reusing the resource of existing cellular users,D2D (device-to-device)communication underlaying cellular network can improve the spectrum utilization rate and reduce the power consumption of mobile terminals.However,it will bring interference to the existing cellular networks.In order to ensure the quality of service of D2D users and cellular users,the power control and resource allocation scheme for D2D communication underlaying cellular communications was studied.Specifically,fractional frequency reuse was introduced to achieve the resource partitioning and resource reuse between cellular users and D2D users.Based on the principle of maximizing the throughput of the whole system,the optimization objective was established.Combined with the fractional power control and introduction of interference limits,a dynamic power control strategy was proposed.Simulation results show that the proposed scheme improves the performance of the overall system.

Key words: D2Dcommunication, interferencecoordination, fractionalfrequencyreuse, resourceallocation, fractionalpowercontrol

王现超,江帆,孙长印,李晨碧,申斌艳. D2D通信中一种基于FFR的动态功率控制方案[J]. 电信科学, 2016, 32(9): 44-51.

Xianchao WANG,Fan JIANG,Changyin SUN,Chenbi LI,Binyan SHEN. Dynamic power control scheme based on fractional frequency reuse for D2D communication[J]. Telecommunications Science, 2016, 32(9): 44-51.

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参数	数值
系统模型	7小区模型
载波频率/GHz	2.0
系统带宽/MHz	10
资源块带宽/kHz	180
用户的最大发射功率/dBm	23
小区半径/m	500
β	2/3
噪声功率谱密度/(dBm·Hz^-1)	-174
阴影衰落	μ=0；σ_CUE=8 σ=8(dBm)
D2D对收发距离/m	10～15
每一小区的用户数目	CUE:30个，DUE:20个