超蜂窝网络分离方案设计与软件定义实现  

System design and software-defined implementation for hyper-cellular network

作　　者：陈晟[1,2] 李永康[1,2] 汪广超 王刘猛 姜之源 周盛[1,2] 牛志升[1,2] 

机构地区：[1]清华大学电子工程系,北京100084 [2]清华大学信息科学与技术国家实验室(筹),北京100084

出　　处：《中国科学：信息科学》2017年第5期529-543,共15页Scientia Sinica(Informationis)

基　　金：国家重点基础研究发展计划(973)(批准号:2012CB316000);国家自然科学基金(批准号:61461136004;61571265;91638204)资助项目

摘　　要：针对移动通信网络数据业务急速增长带来的频谱资源紧张和系统能耗增加的问题,超蜂窝网络架构通过控制覆盖和业务覆盖的适度分离,引入基站的动态休眠和资源调度,从而大幅度提高网络的频谱效率和能量效率.但如何在不破坏用户终端协议栈的前提下实现蜂窝网络控制覆盖和业务覆盖的分离,是需要解决的问题.本文分析了GSM系统和LTE系统的主要信令流程及协议架构,提出了相应的超蜂窝网络设计方案,核心思路都是通过逻辑信道的划分实现基站功能的分离,进而实现控制覆盖和业务覆盖的分离.借助软件无线电设备,搭建了超蜂窝网络实验平台,对上述分离方案进行了初步的验证.本文还结合云计算技术和软件定义网络技术,设计了软件定义超蜂窝架构,并搭建了相应的云化超蜂窝网络演示平台.The rapid growth of traffic data in mobile networks has led to a shortage in spectrum resources and a significant increase in energy consumption. In order to solve these problems, hyper-cellular networks provide dynarnic sleep and resource scheduling schemes for base stations through careful separation of control coverage and tramc coverage, thus greatly improving network spectral and energy efficiency. However, how to separate network control coverage and traffic coverage without destroying existing terminal protocol stacks is a problem that still needs to be solved. We analyze the signaling flow and protocol architecture of GSikl and LTE systems, and then propose a separation scheme for these systems in a hyper-cellular architecture. The basic idea is to accomplish the separation of base station flmctionality by dividing the logical channel, thus achieving separation of control coverage and traffic coverage. With the aid of software radio equipment, we build an experimental platform to verify the proposed solutions. Combined with other technologies such as cloud radio access networks and Software Defined Networks, we propose a software-defined hyper cellular architecture and create a cloud-based demonstration platform.

关 键 词：超蜂窝网络 控制与业务覆盖分离 软件无线电 软件定义网络 网络功能虚拟化 

分 类 号：TN929.5[电子电信—通信与信息系统]