The time scheduled traffic in spectrally efficient elastic optical networks (EONs) is periodic and exhibits non uniform pattern, in both, the time as well as the requested bandwidth. In time domain, it remains heavy during the office hours and slacks during the non-office hours; while in the bandwidth domain, it is distributed non-uniformly along the network links and also, may vary from few Gbps to hundreds of Gbps. This inefficient utilization of spectral resources results in increased blocking of connection requests. Hence, to address the problem of traffic unevenness in time and bandwidth domains in the EONs, traffic balancing based routing and spectrum assignment (TBRSA) strategies for scheduled traffic are proposed in this manuscript. Traffic balancing is on the basis of service level agreements (SLA) between the clients and the network service providers. The characteristics of traffic and the advanced features of EONs have been exploited to perform the traffic balancing. The proposed strategies have been compared with the existing benchmark strategy. The metrics of comparison are bandwidth blocking probability (BBP), spectrum utilization ratio (SUR), fragmentation index (FI) and a newly introduced metric, spectrum time utilization ratio (STUR). From the simulation results, it has been conclusively established that the proposed traffic balancing based RSA strategies outperform the benchmark strategy in all the parameters of interest.

频谱有效的弹性光网络（EON）中的计划时间流量是周期性的，并且在时间以及请求的带宽方面均显示出不均匀的模式。在时域上，它在办公时间内仍然很沉重，而在非办公时间则比较宽松。而在带宽域中，它沿网络链路分布不均匀，并且可能从几Gbps到几百Gbps不等。频谱资源的这种低效利用导致连接请求的阻塞增加。因此，为了解决EON中时域和带宽域中流量不均的问题，本手稿中提出了基于流量平衡的路由和频谱分配（TBRSA）策略用于调度流量。流量平衡基于客户端与网络服务提供商之间的服务级别协议（SLA）。流量的特性和EON的高级功能已被用来执行流量平衡。拟议的策略已与现有的基准策略进行了比较。比较的指标是带宽阻塞概率（BBP），频谱利用率（SUR），碎片指数（FI）和新引入的指标频谱时间利用率（STUR）。从仿真结果可以得出结论，所提出的基于流量平衡的RSA策略在所有感兴趣的参数方面均优于基准策略。拟议的策略已与现有的基准策略进行了比较。比较的指标是带宽阻塞概率（BBP），频谱利用率（SUR），碎片指数（FI）和新引入的指标频谱时间利用率（STUR）。从仿真结果可以得出结论，所提出的基于流量平衡的RSA策略在所有感兴趣的参数方面均优于基准策略。拟议的策略已与现有的基准策略进行了比较。比较的指标是带宽阻塞概率（BBP），频谱利用率（SUR），碎片指数（FI）和新引入的指标频谱时间利用率（STUR）。从仿真结果可以得出结论，所提出的基于流量平衡的RSA策略在所有感兴趣的参数方面均优于基准策略。