ISO 22641:2012规定了与TM空间数据链路协议（根据ISO 22645:2005）或AOS空间数据链路协议（根据ISO 22666:2007）一起使用的同步和信道编码方案，其旨在由空间任务在空间到地面或空间到空间通信链路上使用。 ISO 22641:2012根据以下方面定义同步和信道编码方案: 向本规范用户提供的服务， 数据格式，以及 为生成和处理数据格式而执行的过程。 ISO 22641:2012未规定 单个实现或产品， 执行程序所需的方法或技术，或 配置和控制系统所需的管理活动。

ISO 22641:2012 specifies synchronization and channel coding schemes for use with the TM Space Data Link Protocol (according to ISO 22645:2005) or the AOS Space Data Link Protocol (according to ISO 22666:2007), which are intended to be used over space-to-ground or space-to-space communications links by space missions. ISO 22641:2012 defines synchronization and channel coding schemes in terms of

1. the services provided to the users of this specification,
2. data formats, and
3. the procedures performed to generate and process the data formats.

ISO 22641:2012 does not specify

1. individual implementations or products,
2. the methods or technologies required to perform the procedures, or
3. the management activities required to configure and control the system.