37332 semantics the vcfindication primitive shall

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Unformatted text preview: be passed from the service provider to the VCF Service user at the receiving end to deliver a Frame. 3.7.3.3.4 Effect On Receipt The effect of receipt of the VCF.indication primitive by the VCF Service user is undefined. CCSDS 132.0-B-1 Page 3-17 September 2003 CCSDS RECOMMENDATION FOR TM SPACE DATA LINK PROTOCOL 3.7.3.3.5 Additional Comments The VCF.indication primitive shall be used to deliver Transfer Frames of a Virtual Channel to the VCF Service user identified by the GVCID. 3.8 MASTER CHANNEL FRAME SECONDARY HEADER (MC_FSH) SERVICE 3.8.1 OVERVIEW OF MC_FSH SERVICE The Master Channel Frame Secondary Header (MC_FSH) Service provides synchronous transfer of fixed-length data units in the Transfer Frame Secondary Header (FSH) of Transfer Frames of a Master Channel. The service is unidirectional and sequence-preserving. The transfer is synchronized with the release of Transfer Frames of a Master Channel. The service does not guarantee completeness, but it may signal gaps in the sequence of service data units delivered to a receiving user. Only one user, identified with the MCID of the Master Channel, can use this service on a Master Channel. Service data units from different users are not multiplexed together within one Master Channel. 3.8.2 MC_FSH SERVICE PARAMETERS 3.8.2.1 General The parameters used by the MC_FSH Service primitives shall conform to the specifications contained in subsections 3.8.2.2 through 3.8.2.4. 3.8.2.2 FSH_SDU NOTE – The FSH_SDU parameter is the service data unit transferred by the MC_FSH Service in the Frame Secondary Header of Transfer Frames of a Master Channel. For restrictions on the FSH_SDU transferred by the MC_FSH Service, see 3.2.4. 3.8.2.3 MCID The MCID parameter shall contain an MCID that indicates the Master Channel through which the FSH_SDU is to be transferred. NOTE – The MCID parameter is the SAP address of the MC_FSH Service. 3.8.2.4 FSH_SDU Loss Flag The FSH_SDU Loss Flag is an optional parameter that may be used to notify the user at the receiving end of the MC_FSH Service...
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