TWDM-PON中用户行为感知的动态资源分配策略

TWDM-PON是下一代光接入网的主流方案,具有带宽高、距离长、用户多等特点.针对用户行为差异性增大的问题,为有效降低网络时延及提升资源分配的公平性,提出一种用户行为感知的动态资源分配策略.根据用户行为带来的业务动态变化状况,动态调整ONU的轮询机制以满足用户服务水平变化要求,并划分子周期交替发送不同等级的业务,设计高效的数据块加载方法来实现负载均衡的多波长传输.仿真结果表明,与传统策略相比,所提策略在保证资源利用率高达95%的同时,既使业务平均时延改善50%以上,也使资源分配具有更好的公平性.

User-Behavior Aware Dynamic Resource AIIocation Strategy in TWDM-PON

As a mainstream solution for next generation optical access network,the TWDM-PON has the characteris-tics of high bandwidth,long distance,numerous access users etc.In order to effectively reduce the network delay and pro-mote the fairness of resource allocation,an user-behavior aware dynamic resource allocation strategy is proposed for adapting to the increasing differences of user-behaviors in TWDM-PON.According to the dynamic traffic status brought by user-be-haviors,the ONU polling mechanism is adjusted in real-time to satisfy the requirements of ONU service level.And the intro-duction of traffic sub-cycle can make the different grade service alternately send.Finally,for achieving multi-wavelength transmission of load balance,an efficient data block loading mechanism is designed.The simulation results show that the pro-posed strategy can reduce packet delay more than 50%and keep better fairness during resource allocation,while the utiliza-tion rate of network resource can reach 95%.