ISO 22672:2006

The Forward Space Packet (FSP) service is a Space Link Extension (SLE) transfer service that enables a mission to send Space Packets to a spacecraft in sequence-controlled or expedited mode. ISO 22672:2006 defines, in an abstract manner, the FSP service in terms of

• the operations necessary to provide the transfer service;
• the parameter data associated with each operation;
• the behaviours that result from the invocation of each operation;
• the relationship between, and the valid sequence of, the operations and resulting behaviours.

It does not specify

• individual implementations or products;
• the implementation of entities or interfaces within real systems;
• the methods or technologies required to radiate Space Packets to a spacecraft and to acquire telemetry frames from the signals received from that spacecraft for extraction of the Operational Control Field;
• the methods or technologies required for communications;
• the management activities necessary to schedule, configure, and control the FSP service.