摘要
针对现有技术应用到集中式/协作式/云计算无线接入网(centralized,cooperative,cloud radio access network,C-RAN)中不能充分利用其集中式管理特性,从而造成无线资源利用率较为低下的问题,研究了C-RAN架构下的直接通信(device to device,D2D),提出了一种基于分组调度的直接通信机制,该机制利用C-RAN架构网络中基带资源处理池共享移动终端信息的特性,通过移动终端的位置信息直接计算用户之间的距离,并与设定的门限值比较,以确定是否建立直接通信并根据判断结果建立通信链路。仿真结果表明,C-RAN架构网络采用直接通信方式,系统吞吐量增加了7.2%,用户连接数提高了6.4%。
Direct communication（ device to device, D2D） can solve the problem of low utilization ratio of wireless resource in C-RAN wireless network as the existing technology can not make full use of the characteristic of centralized management for C-RAN（ centralized, cooperative, cloud radio access network, C-RAN ）in C-RAN wireless network. This paper proposes a mechanism based packet scheduling for direct communication, the mechanism takes advantage of mobile terminal information shared in baseband resource pool in C-RAN wireless network, through the position information of mobile terminal directly calculates the distance between users and compares with the setting threshold to determine whether to establish direct communication, then establishes a communication link according to the results of the judgment . The simulation results show that the throughput can increase by 7.2% and the number of users that wireless network can connect at the same time can increase by 6.4% in C-RAN wireless network with direct communication.
出处
《重庆邮电大学学报（自然科学版）》
CSCD
北大核心
2014年第4期434-438,共5页
Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)
基金
国家重大专项(2010zx03003008-004)
重庆市教委资助项目(KJ120510)
重庆邮电大学自然科学基金资助项目(A2011-15)~~
