弹性光网络中多播业务负载均衡的研究  

Research on Load Balancing of Multicast Services in Elastic Optical Networks

作　　者：张建芳 杨阳 郝娟 ZHANG Jian-fang;YANG Yang;HAO Juan(Hebei Institute of Architecture and Civil Engineering,Zhangjiakou,Hebei 075000)

机构地区：[1]河北建筑工程学院信息工程学院,河北张家口075000

出　　处：《河北建筑工程学院学报》2020年第4期146-150,共5页Journal of Hebei Institute of Architecture and Civil Engineering

基　　金：2019年度河北省高等学校科学技术研究项目(Z2019091,项目名称:基于NB-IoT网络的崇礼滑雪场运动员追踪定位及事故报警系统研究)。

摘　　要：在弹性光网络中,多播服务变得越来越流行和普及。由于大量业务涉及到这种服务,网络运营商研究出系列方案高效的将传输内容传至用户端。弹性光网络的重要特征是弹性分配频谱资源,根据用户需要和业务量大小动态分配适量的频谱资源并配置相应的调制格式,弥补了波长路由光网络的不足。由于多播业务在传送时需要满足频谱一致性,频谱连续性和频谱非重叠性限制,所以传输过程中会产生大量频谱碎片,从而容易导致多播业务请求失败。本文提出基于网状网的分子带多播路由算法来解决多播业务请求失败的技术难题,不仅可以提高多播业务的选路成功率,而且可以实现多播业务的负载均衡。Multicast service has become more and more popular in elastic optical networks.Due to a large number of applications involved with these services,network operators have proposed some solutions to efficiently transfer the messages to the user.An important feature of elastic optical network is flexible allocation of spectrum resources.Appropriate spectrum resources are dynamically allocated according to users’acquirements and the traffic volume.The corresponding modulation formats are configured to be built up for the deficiency of wavelength routing optical network.Because multicast services need to meet the requirements of spectrum consistency,spectrum continuity and spectrum non-overlapping,a large number of spectrum fragments will be generated.It will easily lead to the failure of multicast service requests.In this paper,a molecular band multicast routing algorithm based on the mesh network is proposed to solve the above-mentioned problem of multicast service request failure,which can not only improve the success rate of multicast service routing,but also realize the load balancing of multicast services.

关 键 词：弹性光网络 多播业务 路由 负载均衡 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]