中继卫星系统按需接入业务应用模式研究

Study on Operation Modes of Demand Access Service of TDRSS

DAS(按需接入业务)作为一种新兴业务,不但扩展了美国TDRSS(跟踪与数据中继卫星系统)的多址返向能力,而且还采用模块化的体系结构,为未来的空间网络互联提供了支撑。根据规划,我国未来的中继卫星系统也将提供按需接入业务。因此,在简要介绍TDRSS DAS概念与体系结构,并对其用户分类、返向波束工作方式、典型操作场景、服务模式进行分析的基础上,总结出6种DAS应用模式:1)航天器用户+随机接入+动态波束跟踪方式+任意TDRS或全TDRS服务模式;2)航天器用户+非随机接入+动态波束跟踪方式+特定TDRS服务模式;3)航天器用户+非随机接入+动态波束跟踪方式+任意TDRS或全TDRS服务模式;4)非航天器用户+随机接入+静态波束组合方式+特定TDRS服务模式;5)非航天器用户+随机接入+动态波束跟踪方式+任意TDRS或全TDRS服务模式;6)非航天器用户+非随机接入+动态波束跟踪方式+特定TDRS服务模式,以期能对我国未来中继卫星系统S频段多址业务的应用提供技术支撑。

As an emerging type of service of the TDRSS （Tracking and Data Relay Satellite System）, DAS （Demand Access Service） not only expands the multiple access return capabilities of TDRSS, but also supports future space- networking with the use of modular architecture. According to the planning of CTDRSS （the Chinese Tracking and Data Relay Satellite System）, DAS shall also be provided. Following introduction of the concept and architecture of TDRSS and analysis of the categories of customers, operation modes of multi-access return beam, typical operation scenes and service modes of DAS, six operation modes of TDRSS DAS are presented： 1） Spacecraft Customer and Random Access and Dynamic Beam Tracking and Any-TDRS or All-TDRS Service Mode; 2） Spacecraft Customer and non-Random Access and Dynamic Beam Tracking and Specific TDRS Service Mode; 3） Spacecraft Customer and non-Random Access and Dynamic Beam Tracking and An^TDRS or All-TDRS Service Mode; 4） non-Spacecraft Customer and Random Access and Static Beam Combing and Specific-TDRS Service Mode; 5） non-Spacecraft Cus- tomer and Random Access and Dynamic Beam Tracking and Any-TDRS or All TDRS Service Mode; 6） non-Space- craft Customer and non-Random Access and Dynamic Beam Tracking and Specific-TDRS Service Mode, to provide technical supports for the applications of S-band Multiple Access （SMA） service of the next generation of CTDRSS.