弹性光网络中负载均衡的优先共享通路保护  

A Preferential Shared Path Protection Algorithm with Load Balancing for Distance Adaptive Elastic Optical Networks

作　　者：熊余[1] 高玉鹏[1] 王汝言[1] 

机构地区：[1]重庆邮电大学光通信与网络重点实验室,重庆400065

出　　处：《上海交通大学学报》2017年第5期610-618,共9页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金项目(61401052);重庆市教委科学技术研究项目(KJ1400418;KJ1500445);重庆邮电大学博士启动基金项目(A2015-09)资助

摘　　要：为在弹性光网络中实现最大化的备份频谱资源共享,提出了一种基于负载均衡的优先共享通路保护算法.在降低网络的阻塞率和保护开销时,综合考虑业务的传输距离、频谱资源利用率及链路状态等因素,建立整数线性规划模型确立优化目标,并提出启发式算法对路由和频谱分配联合优化选路,从而提供100%的单链路故障保护.仿真结果表明,与传统共享通路保护算法相比,所提算法在降低网络阻塞率的同时更有效地降低了保护开销,最大限度地实现备份频谱资源的共享.In order to maximize backup spectrum resources sharing of connections with different bandwidth requests in elastic optical networks, a preferential shared path protection algorithm with load balance is de- veloped. An integer linear program is formulated to provide the optimal working and backup path for each connection request instantly on the premise of making comprehensive consideration for the physical dis- tance, resource utilization and the link status. Furthermore, a heuristic algorithm is presented to optimize jointly the route selection of the working path and backup path, so that 100% single link failure protection can be provided. Compared to the conventional shared path protection algorithm, the proposed preferential shared path protection （PSPP） algorithm is effective in reducing blocking probability and improving spec- tral efficiency.

关 键 词：弹性光网络 距离自适应 路由与频谱分配 共享通路保护 阻塞率 

分 类 号：TN915[电子电信—通信与信息系统]