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针对卫星光网络接入选择算法不够灵活高效的问题,研究了天基光网络中基于并行排队策略(PQS,parallel queuing strategy)的动态在线式接入选择算法。分析接入选择问题的约束条件并建立数学模型,在排队模型的基础上增加动态优先级策略dps(dynamic priority strategy),实现不同优先级任务的区分服务;通过引入时间敏感因子实现对不同优先级任务等待时延区分度的调节,避免低优先级任务一直被高优先级任务抢占的问题;通过增加PQS使调度方案得到全局优化,缩短任务等待时延。仿真结果表明,本文算法将等待时延降低30%左右,有效提升了接入调度的灵活和高效性。
Aiming at the problem that satellite optical network access selection algorithm is not flexible and efficient, a dynamic online access selection algorithm based on PQS (parallel queuing strategy) is studied. Analyze the constraints of access selection problem and establish a mathematical model, add dps (dynamic priority strategy) based on the queuing model to realize the differentiated services of different priority tasks; through the introduction of time-sensitive factors to achieve different priority To avoid the problem that low-priority tasks have been preempted by high-priority tasks all the time; To increase the PQS so that the scheduling scheme can be globally optimized to shorten the task waiting delay. The simulation results show that the proposed algorithm reduces the latency by about 30% and effectively improves the flexibility and efficiency of access scheduling.