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为了适应可实现性强、稳健性高的卫星光交换网络,选择模拟偏置时间光突发交换(E-OBS)作为转发卫星的激光通信架构,并结合现有的地面光交换资源预留方法,提出了一种偏置时间固定的资源预留机制。通过流量估计把突发数据按照目的地址和服务质量(Qo S)区分为单个突发和突发流,按照分类对卫星光网络资源进行了成功预留,并建立了平均端-端时延、吞吐量、链路利用率、丢包率数学分析模型。理论分析与仿真证明,该资源预留方法通过突发流机制降低了光交换矩阵的重置时间和交换时延,通过E-OBS架构降低了核心节点控制复杂度和对边缘节点的缓存需求,提高了网络吞吐量,适用于星载光交换网络。
In order to adapt to the realizable and robust satellite optical switching network, we choose the analogue offset time optical burst switching (E-OBS) as the laser communication architecture of the forwarding satellite, and combined with the existing reservation method of terrestrial optical switching resources , A resource reservation mechanism with fixed offset time is proposed. According to traffic estimation, the burst data is divided into single burst and burst according to the destination address and quality of service (Qo S). According to the classification, the satellite optical network resources are successfully reserved and the average end-to-end delay is established. Throughput, link utilization, packet loss mathematical analysis model The theoretical analysis and simulation show that the resource reservation method reduces the reset time and exchange delay of the optical switching matrix through the burst flow mechanism, reduces the control complexity of the core node and the buffer requirement for the edge node through the E-OBS architecture, Improve network throughput, suitable for satellite optical switching network.