ISO 22667:2013

Overview

ISO 22667:2013 - Communications operation procedure‑1 (COP‑1) is an international standard that specifies a reliable data‑link procedure for space communications. COP‑1 is designed to work with the telecommand (TC) space data link protocol (see ISO 22664:2013) to ensure that service data units are delivered to the receiving layer exactly as sent: correctly, without omission or duplication, and in the same order. The standard defines COP‑1 in terms of interfaces with other procedures, internal protocol variables, protocol actions, and state transitions. It does not prescribe specific implementations, products, or management procedures.

Key topics and requirements

• Reliable delivery: Automatic retransmission to guarantee correct, in‑order delivery of service data units over ground‑to‑space or space‑to‑space links.
• Protocol definition: Formal description of COP‑1 interfaces, internal variables, actions performed by the protocol entity, and state transitions.
• Layer placement: Defined for the Data Link layer consistent with the OSI Basic Reference Model to support interoperability.
• Scope limits: The standard does not define hardware/software implementations, service interface implementations in real systems, or the management activities for protocol configuration.
• Interoperability focus: Intended to support cross‑agency and cross‑vendor compatibility for space mission communications.

Practical applications

• Telemetry and telecommand links: Ensures dependable telecommand and data transfer for spacecraft operations where message completeness and order matter.
• Mission ground segments and flight systems: Used in designing data‑link components of flight software, mission control systems, and ground stations to implement reliable transfer services.
• Cross‑support missions: Facilitates multi‑agency interoperability and systems that must exchange command/data across different organizations and vendors.
• Spacecraft-to-spacecraft networking: Applicable for space‑to‑space links that require robust retransmission and ordered delivery.

Who uses this standard

• Space systems engineers and protocol designers
• Satellite manufacturers and avionics developers
• Ground segment and mission operations teams
• Systems integrators working on cross‑agency missions
• Standards and interoperability working groups (CCSDS/ISO)

Related standards

• ISO 22664:2013 - Telecommand (TC) space data link protocol (equivalent to CCSDS 232.0‑B‑2) - the complementary data link protocol used with COP‑1.
• CCSDS 232.1‑B‑2 - Original CCSDS Recommended Standard for COP‑1 adopted as ISO 22667:2013.
• OSI Basic Reference Model - referenced for Data Link layer alignment.

ISO 22667:2013 is essential reading for anyone implementing or validating reliable space data‑link procedures, ensuring automatic retransmission, ordered delivery, and cross‑domain interoperability in space mission communications.