摘要
为了解决现有Link16数据链信息传输受视距限制的问题,考虑将低轨道(LEO)卫星作为节点接入Link16网络以扩展其通信范围,增强数据链的灵活性。针对其接入导致的长传播时延的问题,以轨道高度为480 km的LEO卫星为例,基于Link16系统战术消息要求的响应时间,结合Link16时隙结构对LEO卫星的消息响应时间进行了研究,对等待接入时间、队列等待时间以及战术消息传播时间进行数学建模分析,得到了在规定战术消息响应时间下,LEO卫星时隙资源分配数量需求的普适公式,公式表明为了使战术消息在要求时间内送达,需要给LEO卫星节点分配足够数量的时隙。最后,对LEO卫星的消息响应时间进行了仿真,对不同到达率消息的响应时间进行了对比分析,仿真结果验证了理论的正确性。
Aiming at the the problem that the existing Link16 data link information transmission is constrained by the visual distance,consider joining the low orbit(LEO)satellite as a node to the Link16 network to expand its communication range and enhance the flexibility of the data link.In order to solve the problem of long propagation delay caused by its access,this paper takes LEO satellite with an orbital height of 480km as an example,studies the response time of LEO satellite's message based on Link16 system's response time required by tactical message,and combines Link16 time-slot structure.Mathematical modeling and analysis are made on the waiting access time,queue waiting time and tactical message propagation time.A general formula for the resource allocation requirement of LEO satellite time slots under tactical message response time indicates that in order for tactical messages to be delivered within the required time,a sufficient number of time slots need to be allocated to LEO satellite nodes.Finally,the message response time of LEO satellite is simulated,and the response time of messages with different arrival rates is compared and analyzed.The simulation results verify the correctness of the theory.
作者
穆桐
陶孝锋
史晶晶
孙召
MU Tong;TAO Xiaofeng;SHI Jingjing;SUN Zhao(China Academy of Space Technology(Xi’an),Xi’an 710000,China)
出处
《空间电子技术》
2021年第3期53-57,共5页
Space Electronic Technology
关键词
数据链
低轨卫星
时隙资源
消息响应时间
data link
LEO satellite
timeslot resource
message response time
