欧空局OPSNET通信网新进展

The Latest Development of OPSNET of ESA

为了支持我国航天测控通信网的IP(互联网协议)化以及未来发展,对欧空局的航天任务操作通信网OPSNET(操作支持通信网)的新进展进行了研究。首先回顾了OPSNET网络发展历程中的里程碑事件(完成网络IP化,调整网络拓扑结构,通过载荷分担模式超越网络链路的带宽极限),之后介绍了该网络面临的高数据速率挑战及多个备选解决方案,详细介绍了最终选用的基于MPLS(多协议标签交换)技术的网络设计。OPSNET网络向MPLS迁移的方案经实验室环境验证后分步实施,经多个层面的验证及实际运行证明,采用MPLS技术后,以较低的成本实现了很好的网络性能。未来OPSNET将以此为基础部署更多的MPLS链路,并可能增加加密业务。OPSNET通信网的新进展值得我们关注和借鉴。

The latest development of OPSNET （Operations Support Communication Network） of ESA （European Space Agency） is studied to provide support to IP （Internet Protocol）-based transition and development of China＇s space TT^C （Telemetry, Tracking and Command） and communication network. Following a review of the mile- stones （transition to IP-based network, changes in topology, yielding the bandwidth limit of link in load share mode） in the course of development of OPSNET, the challenge of high data rate that OPSNET faced and solution options are introduced. In particular, the final network design solution of a WAN （Wide Area Network） based on MPLS （Multi-Protocol Label Switching） is described in detail. The transition is implemented in steps after passing test and validation in a lab environment. Validations at different levels and mission operations show that MPLS- based WAN brings high network capability with optima/ cost-effectiveness. More MPLS-based links will be de- ployed on the current basis and encryption service may also be deployed in OPSNET in the future.