带有负载均衡机制的网状WDM网络抗毁策略研究

Research on survivable mesh WDM optical networks using load-balancing mechanism

研究了带有负载均衡机制的抗毁网状WDM网络,旨在保证网络具有抗毁能力的同时尽量减少全网光域所使用的资源,即在选择工作路径和保护路径时尽量保证全网的负载均衡。以波长数量最小化为优化目标,建立规划模型分别对多纤网状WDM网络中的共享路径保护和共享链路保护策略进行了研究,同时辅以负载均衡机制对网络资源利用率进一步优化。仿真结果表明,该结构在保证网络抗毁性的同时,能够有效地减少全网总体所需的波长数,降低网络成本。

To meet the constraint on the survivability,the cost efficient survivable mechanism was proposed.Based on the load-balancing scheme,the wavelength contention could be mitigated for the selection on working path and backup path.The ILP model was established to achieve the object of minimizing the total needed wavelength number,and two types of protection strategies,shared-path protection and shared-link protection,were discussed;moreover,the sub object of minimizing the load imbalance was used to keep the network resources utilized reasonably.The results show that the survivability can be guaranteed;at the same time,overall wavelength number requirement can be reduced.