一种C-RAN架构下载波迁移的调度策略  

A scheduling strategy of carrier migration under the framework of C-RAN

作　　者：龙恳[1] 兰莹菲 黎伟[1] 

机构地区：[1]重庆邮电大学移动通信技术重庆市重点实验室,重庆400065

出　　处：《重庆邮电大学学报（自然科学版）》2015年第1期1-5,共5页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：国家科技重大专项课题(2014ZX03003004-003)~~

摘　　要：在云无线电接入网络(cloud-radio access network,RAN)架构的基础上,为提高载波迁移后虚拟多模基站的资源利用率和负载均衡度,把CPU资源适度分离成基带CPU资源和协议CPU资源,并提出一种基于负载特征的载波迁移调度策略。针对物理层主机的触发类型和虚拟多模基站的负载特征,采用双阈值上下触发方式触发迁移,根据9种负载状态并采用最小资源代价策略,完成对需要迁移的虚拟多模基站以及目标主机的选择。实验结果表明,基带资源利用率方差均值降低0.04左右,协议资源利用率方差均值降低0.03左右,实现了虚拟基站迁移的自主管理,并且达到了节约资源的目的。迁移前后,虚拟基站的状态没发生太大的改变,具有良好的一致性。In this paper,to improve the resource utilization and load balancing,we have the CPU resources reasonably separated into baseband CPU resources and protocol CPU resources,and propose a load characteristics based carrier migration scheduling strategy under the framework of C-RAN. According to the trigger type of Host in physical layer and the load characteristics of virtual multimode base stations,we employ double threshold up and down trigger method to trigger migration.Then according to the 9 kinds of load conditions and using the minimum resource cost strategy,the virtual multimode base stations need to be migrated and the target Host are selected. Simulation results show that the strategy can make the variance of baseband resource utilization falling about 0. 04,and make the variance of protocol resource utilization falling about 0. 03. The strategy also realize self-management of base station migration. Moreover,the destination of resource saving is achieved. The state of base station will not change too much before and after the migration,and it has a good consistency.

关 键 词：云无线电接入网络(C-RAN) 虚拟多模基站 负载均衡 

分 类 号：TN914.53[电子电信—通信与信息系统]