ISO 22646:2005 pdf download.Space data and information transfer systems -Space packet protocol.
The service definitions are given in the form of primitives. which present an abstract model of the logical exchange of data and control information between the protocol entity and the scrvicc user. The definitions of primitives arc indcpcndent of specific implcmcntation approaches.
Thc procedure specifications delinc the procedures performed by protocol entities for the transfer of information between peer entities. The definitions of procedures are independent of specific implementation methods or technologies.
This protocol specification also specifies the requirements for the services provided by the underlying suhnetworks.
2.2 OVl:klEW OF SERVICFS
2.2.1 COMMON fl.VURES OF sFRvICF:s
The Space Packet Protocol provide.. useis with data transfer services. The point at which a service is provided by a protocol entity to a user is called an SAP (see reference Ilh. A Service Access Point of the Space Packet Protocol is identified by a Path IL) and each service user is also identified by a Path IL).
Service data units submitted to a SAP are processed in the order of submission. No processing order is maintained for service data units submitted to different SAPs.
NOTE — Implementations may be required to perform flow control at a SAP between the service user and the service provider. However. CCSDS does not recommend a scheme for flow control between the user and the provider.
Thc procedure specifications delinc the procedures performed by protocol entities for the transfer of information between peer entities. The definitions of procedures are independent of specific implementation methods or technologies.
This protocol specification also specifies the requirements for the services provided by the underlying suhnetworks.
2.2 OVl:klEW OF SERVICFS
2.2.1 COMMON fl.VURES OF sFRvICF:s
The Space Packet Protocol provide.. useis with data transfer services. The point at which a service is provided by a protocol entity to a user is called an SAP (see reference Ilh. A Service Access Point of the Space Packet Protocol is identified by a Path IL) and each service user is also identified by a Path IL).
Service data units submitted to a SAP are processed in the order of submission. No processing order is maintained for service data units submitted to different SAPs.
NOTE — Implementations may be required to perform flow control at a SAP between the service user and the service provider. However. CCSDS does not recommend a scheme for flow control between the user and the provider.
