标准编号：ISO 18440:2016
中文名称：空间数据和信息传输系统 空间链路扩展 传输服务的互联网协议
英文名称：Space data and information transfer systems — Space link extension — Internet protocol for transfer services
发布日期：2016-11
标准范围
The Space Link Extension (SLE) Reference Model identifies a set of SLE Transfer Services that enablemissions to send forward space link data units to a spacecraft and to receive return space link data units froma spacecraft. A subset of these services is specified by the SLE Transfer Service Recommended Standards.The SLE Transfer Service Recommended Standards specify:a) the operations necessary to provide the transfer service;b) the parameter data associated with each operation;c) the behaviors that result from the invocation of each operation; andd) the relationship between, and the valid sequence of, the operations and resulting behaviors.However, they deliberately do not specify the methods or technologies required for communications.The purpose of this International Standard is to define a protocol for transfer of SLE Protocol Data Units(PDUs) defined in the SLE Transfer Service Recommended Standards using the Internet protocols TCP(Transmission Control Protocol and IP (Internet Protocol) for data transfer and the Abstract Syntax NotationOne (ASN.1) for data encoding. This protocol is referred to as the Internet SLE Protocol One (ISP1).This International Standard defines a protocol for transfer of SLE PDUs between an SLE user and an SLEprovider system in terms of:a) the procedures used to establish and release associations;b) the messages exchanged on an established association;c) the procedures used to monitor the status of data communication connections; andd) the methods used to ensure that data are converted between different formats and representations ondifferent platforms.It does not specify:a) individual designs, implementations, or products;b) the configuration of the data communications infrastructure, including configuration of the TCP and IPprotocols;c) the means by which addresses (IP addresses and TCP port numbers) are agreed, assigned, andcommunicated.This International Standard responds to the requirements imposed by the International Standards for SLEtransfer services that were available when this International Standard was released. The protocol specified inthis International Standard conforms to the requirements on data communication services set forth in thoseInternational Standards.The scope and field of application are furthermore detailed in subclause 1.3 of the enclosed CCSDSpublication.
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