Note the mcid parameter is the sap address of the

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Unformatted text preview: that a sequence discontinuity has been detected, and CCSDS 132.0-B-1 Page 3-18 September 2003 CCSDS RECOMMENDATION FOR TM SPACE DATA LINK PROTOCOL that one or more FSH_SDUs may have been lost. If implemented, the flag shall be derived by examining the Master Channel Frame Count in the Transfer Frames. 3.8.3 MC_FSH SERVICE PRIMITIVES 3.8.3.1 General The service primitives associated with the MC_FSH Service are: a) MC_FSH.request; b) MC_FSH.indication. 3.8.3.2 MC_FSH.request 3.8.3.2.1 Function At the sending end, the MC_FSH Service user shall pass an MC_FSH.request primitive to the service provider to request that an FSH_SDU be transferred to the user at the receiving end through the specified Master Channel. NOTE – The MC_FSH.request primitive is the service request primitive for the MC_FSH Service. 3.8.3.2.2 Semantics The MC_FSH.request primitive shall provide parameters as follows: MC_FSH.request 3.8.3.2.3 (FSH_SDU, MCID) When Generated The MC_FSH.request primitive shall be passed to the service provider to request it to send the FSH_SDU. 3.8.3.2.4 Effect On Receipt Receipt of the MC_FSH.request primitive causes the service provider to transfer the FSH_SDU. CCSDS 132.0-B-1 Page 3-19 September 2003 CCSDS RECOMMENDATION FOR TM SPACE DATA LINK PROTOCOL 3.8.3.2.5 Additional Comments The MC_FSH.request primitive shall be used to transfer FSH_SDUs across the space link on the specified Master Channel. 3.8.3.3 MC_FSH.indication 3.8.3.3.1 Function At the sending end, the service provider shall pass an MC_FSH.indication to the MC_FSH Service user at the receiving end to deliver an FSH_SDU. NOTE – The MC_FSH.indication primitive is the service indication primitive for the MC_FSH Service. 3.8.3.3.2 Semantics The MC_FSH.indication primitive shall provide parameters as follows: MC_FSH.indication (FSH_SDU, MCID, FSH_SDU Loss Flag (optional)) 3.8.3.3.3 When Generated The MC_FSH.indication primitive shall be passed from the service provider to the MC_FSH Service user at the receiving end to deliver an FSH_SDU. 3.8.3.3.4 Effect O...
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