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Packet Service

Packet Service. VC Access Service. VC_FSH Service. VC_OCF Service. VC Frame Service. Packet Extraction. MC_Insert Service. MC_OCF Service. Virtual Channel Reception. MC Frame Service. Virtual Channel Demultiplexing. Master Channel Reception. Master Channel Demultiplexing.

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Packet Service

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  1. Packet Service VC Access Service VC_FSH Service VC_OCF Service VC Frame Service Packet Extraction MC_Insert Service MC_OCF Service Virtual Channel Reception MC Frame Service Virtual Channel Demultiplexing Master Channel Reception Master Channel Demultiplexing All Frames Reception Figure 2-6: Internal Organization of Protocol Entity (Receiving End) Figure 4-14: Internal Organization of Protocol Entity (Receiving End)

  2. Packet Service VC Access Service VC_FSH Service VC_OCF Service VC Frame Service Packet Processing MC_Insert Service MC_OCF Service Virtual Channel Generation MC Frame Service Virtual Channel Multiplexing Master Channel Generation Master Channel Multiplexing All Frames Generation Figure 2-5: Internal Organization of Protocol Entity (Sending End) Figure 4-7: Internal Organization of Protocol Entity (Sending End)

  3. Packet Service VC Access Service VC_FSH Service VC_OCF Service VC Frame Service Packet VCA_SDU FSH VC_OCF MC_Insert Service MC_OCF Service MC Frame Service VC Frame VCID MC_OCF Insert MC Frame MCID Key Commutator/ Decommutator Multiplexer/ DeMultiplexer Figure 2-7: AOS/TM Space Data Link Protocol Channel Tree

  4. Transfer Frame Trailer (Optional) Transfer Frame Secondary Header (Optional) Frame Error Control Field (Optional) Master Channel Insert Zone (Optional) Transfer Frame Primary Header Transfer Frame Data Field Operational Control Field (Optional) 6 Octets Fixed Up to 64 Octets Varies to Fill Frame 4 Octets 2 Octets Figure 4-1: TM Transfer Frame Structual Components Transfer Frame Trailer (Optional) Transfer Frame Secondary Header (Optional) Master Channel Insert Zone (Optional) Transfer Frame Primary Header Transfer Frame Header Error Control (optional) Transfer Frame Data Field Operational Control Field (Optional) Frame Error Control Field (Optional) 6 Octets 2 Octets Fixed Up to 64 Octets Varies to fill framr 4 Octets 2 Octets Figure 4-1: AOS Transfer Frame Structual Components

  5. Master Channel ID Transfer Frame Version Number Spacecraft ID Virtual Channel ID OCF Flag Master Channel Frame Count Virtual Channel Frame Count Transfer Frame Data Field Status 2 bits 10 bits 3 bits 1 bits 2 Octets 1 Octets 1 Octets 2 Octets Figure 4-2: TM Transfer Frame Primary Header

  6. Master Channel ID Signaling Flags Virtual Channel Frame Count Frame Header Error Control (Optional) Transfer Frame Version Number Spacecraft ID Virtual Channel ID VC Frame Count Usage Flag VC Sec Hdr Flag VC Frame Count Cycle Replay Flag Spare 2 bits 10 bits 6 bits 1 bit 1 bit 1 bit 1 bit 4 bits 2 Octets 3 Octets 1 Octet 2 Octets Figure 4-2: AOS Transfer Frame Primary Header

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