密集D2D蜂窝网络中认知干扰协调策略研究  

Cognitive interference coordination strategyfor dense D2D cellular networks

作　　者：胡晗[1,2] 宗鹏飞 杨洁 HU Han;ZONG Pengfei;YANG Jie(Jiangsu Key Lab of Wireless Communications,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;College of Internet of Things,Nanjing University of Posts and Telecommunications,Nanjing 210003,China;Communication Engineering Department,Nanjing Institute of Technology,Nanjing 211167,China)

机构地区：[1]南京邮电大学江苏省无线通信重点实验室,江苏南京210003 [2]南京邮电大学物联网学院,江苏南京210003 [3]南京工程学院通信工程学院,江苏南京211167

出　　处：《南京邮电大学学报（自然科学版）》2018年第6期9-18,共10页Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition

基　　金：国家自然科学基金(61701221;61601244);江苏省自然科学基金(BK20140894;BK20160781);江苏省高校自然科学研究(16KJB510013)资助项目

摘　　要：D2D蜂窝网络可显著提高系统效率,提升用户体验,被认为是5G蜂窝通信的重要形式。随着网络节点密集化、随机化组网趋势,在复用频谱资源情况下,跨层与同层干扰将是影响其网络性能的重要瓶颈。文中提出了一种基于信标门限及CSMA/CA协议相结合的认知干扰协调策略。利用随机几何理论,推导了该策略下认知D2D发射机的接入概率、蜂窝层以及D2D层用户的上行中断概率。基于推导结果,能够快速评估密集D2D蜂窝网络中断性能与网络各个参数之间的关系。数值仿真结果表明,所提干扰协调策略能够降低D2D层的同层干扰以及D2D层对蜂窝层的跨层干扰,从而有效提高密集D2D蜂窝网络中断性能。D2D cellular networks can improve the system efficiency and upgrade use experience,thus it is regarded as the key architecture of 5G telecommunication systems.With the tendency of dense and random networking,cross tier and co tier interferences are two main barriers to take advantage of the networks,especially when the spectrum resources are reused.A cognitive interference coordinate strategy based on the beacon constraint and the CSMA/CA protocol is proposed.By applying the tools of stochastic geometry,the cognitive D2D TX access probability,and D2D user and cellular user uplink outage probabilities are derived.Based on the analysis results,the relationships between network outage performances and the system parameters are investigated.Numerical results show that the interference coordinate strategy can efficiently decrease the co tier interferences to D2D user and the cross tier interferences to cellular user,improving the outage performances in the dense D2D cellular networks.

关 键 词：D2D蜂窝网络 随机几何 认知干扰协调 上行 

分 类 号：TN911.4[电子电信—通信与信息系统]