5G超密集组网的多点协作传输和功率分配策略  

Co MP and power allocation in 5G ultra dense networks

作　　者：齐畅 杨龙祥[1] Qi Chang;Yang Longxiang(College of Communication and Information Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]南京邮电大学通信与信息工程学院,江苏南京210003

出　　处：《电子技术应用》2019年第2期58-61,66,共5页Application of Electronic Technique

摘　　要：5G超密集组网(UDN)允许在异构网络中部署大量高密度的低功率传输节点(TP),在提高系统性能的同时也引入了小小区间的同频干扰(ICI)问题。为了解决这一问题,多点协作传输(CoMP)在UDN中得到了广泛的使用。但它也带来了新的挑战,如何有效地进行网络资源的分配就是其中之一。为了提高小小区边缘用户的速率和系统总和率,提出了一种基于小区负载感知的CoMP(CLA-CoMP)方案。针对UDN中的功率分配问题,采用了基于用户关联的后验概率功率分配(P2UPA)策略,它旨在为高关联概率的用户分配更高的功率。仿真结果表明,同使用平均功率分配的UDN系统相比,采用CLA-CoMP和P2UPA的系统性能增益有了明显的提高。5G Ultra-Dense Network(UDN)allows a large number of high-density low-power transmission points(TPs)to be deployed in heterogeneous networks(HetNets).It greatly improves the system performance whereas introduces inter-cell interference(ICI).To eliminate ICI,CoMP concept has been widely used in UDN.But it also brings new challenges,how to effectively allocate network resources is one of them.This paper proposes a CLA-CoMP algorithm to improve both the rate of the small cell edge users and the system sum rate.In order to deal with the power allocation problem in UDN,this paper adopts P2UPA strategy,which aims to allocate higher power to users with the high probability of association.Simulation results reveal that jointly use CLA-CoMP and P2UPA can significantly improve the system performance,compared with the case of average power allocation.

关 键 词：异构网络 超密集组网 功率分配 基于小区负载感知的CoMP 

分 类 号：TN915[电子电信—通信与信息系统]