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根据卫星光交换网络应用需求,结合现有的地面光突发交换资源预留方法,提出了一种基于突发流的资源预留协议。首先通过流量估计把突发数据按照目的地址和QoS区分为单个突发和突发流,然后按照这两种分类对卫星光网络资源进行了成功预留。为了对该预留方法进行考察,建立了平均端-端时延、吞吐量、链路利用率数学分析模型。理论分析与仿真证明了该资源预留方法通过降低光交换矩阵的重置时间和交换时延,有效降低了端-端时延,提高了网络吞吐量,适用于星载光交换网络。
According to the application requirements of satellite optical switching network, a resource reservation protocol based on burst flow is proposed in combination with the existing resource reservation method of ground optical burst switching. Firstly, the burst data is divided into single burst and burst according to the destination address and QoS according to the traffic estimation. Then the satellite optical network resources are successfully reserved according to the two kinds of classification. In order to investigate the reservation method, a mathematical analysis model of average end-to-end delay, throughput and link utilization is established. Theoretical analysis and simulation prove that the resource reservation method reduces the end-to-end delay and the network throughput by reducing the reset time and exchange delay of the optical switching matrix and is suitable for the optical switching network.