机载时间敏感网络链路安全关键度均衡调度方法

Link safety criticality balanced scheduling for airborne time-sensitive network

针对机载时间敏感网络中多数据混传可能导致的风险汇集问题,综合考虑机载网络中数据传输的的实时性与安全性需求,提出了一种链路安全关键度均衡的调度方法。基于专家评价与熵权法完成系统任务安全关键度量化,通过任务映射表征链路安全关键度,构建机载TSN链路安全关键度均衡的调度模型;基于配合约束规划的方法构建了链路安全关键度均衡调度方法(LSCB),LSCB调度方法对链路安全关键度的均衡作用与LB方法和SP方法相比,在任务数为50的场景中分别提升了7.1%和25%,在任务数为100的场景中分别提升了17%和18%。研究结果表明LSCB在保证任务传输延迟上界的基础上,可有效缓解风险汇集。

To overcome the risk aggregation problem caused by multi-data mixed transmission in the airborne timesensitive network,a scheduling method for balancing link safety criticality is proposed considering the requirements for real-timeliness and security of data transmission in the airborne time-sensitive network.The task safety criticality of the system is quantified based on expert evaluation and the entropy weight method.Task mapping is used to characterize the link safety criticality,and a scheduling model of the on-board TSN link safety criticality is constructed.A Link Safety Criticality Balancing(LSCB) scheduling method is constructed based on cooperative constraint programming.Compared with the Load Balancing(LB) and Strict Priority(SP) algorithms,the LSCB scheduling method can improve the link safety criticality balancing effect by 7.1% and 25% respectively in the scenario with 50 tasks,and by 17% and 18% respectively in the scenario with 100 tasks.The results show that the proposed LSCB can effectively mitigate risk pooling on the basis of ensuring the upper bound of task transmission delay.