| 摘要: |
| 分析了全球卫星导航系统（GNSS）发展的现状，指出建立GNSS星间链路（ISL）的需
求。针对这样的需求，提出以高级在轨系统（AOS）空间数据链路层协议建议书为参考来设
计适用于GNSS的星间链路层协议。对GNSS星间可能传输的业务信息基于AOS的建议进行了归
类，认为GNSS星间链路层协议可以使用AOS，具体给出了AOS建议下星间链路层协议的设计。
为使协议更适合GNSS ISL链路层，主要从3个方面对AOS进行改进，即：优化了虚拟信道数
据单元的结构，削减了3种服务，改进了虚拟信道调度与复用方法。对协议的性能进行了分
析仿真，得出了信道误码率、帧长、包长和吞吐量的关系，仿真结果表明所设计的协议可
作为GNSS星间链路协议设计的参考。 |
| 关键词: 全球卫星导航系统 星间链路 业务分类 虚拟信道数字单元 复用业务 协议设计 |
| DOI： |
|
| 基金项目:国家自然科学基金资助项目（60972062） |
|
| Link Layer Protocol Design of Global Navigation Satellite System |
| DONG Fei-hong,LV Jing,CHANG Jiang,KONG Bo |
| () |
| Abstract: |
| This paper analyses the actual state development of Global Navigation S
atellite System(GNSS), points out the need of the Inter-satellite Link(ISL) fo
r GNSS. To achieve this requirement, it advises the Advance Orbit System(AOS
) Space Data Link Protocol Recommendation can be used as a reference. The possib
le traffic which may be sent on ISL is classified based on AOS recommendation.
It indicates the AOS can be appropriate. To let the protocol appropriate f
or GNSS ISL,three main improvements are made,including optimizing virtual channe
l data un
it frame structural components, reducing three services and improving on schedul
ing and multiplexing scheme. A link layer protocol is designed and its performan
ce is simulated. The relationship among Bit Error Rate(BER), frame length, packe
t length and throughput is analysed. The simulation results show that the proto
col designed can be a reference for GNSS. |
| Key words: inter-satellite link class of traffic VCDU multiplexing service protocol desi
gn |
