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188.8.131.52 The Virtual Channel Reception Function shall extract data units contained in the
Data Field of the Transfer Frames, and deliver them to its user (i.e., the Packet Extraction
Function or the VCA Service user).
184.108.40.206 If there is a user of the VC_FSH Service for a particular Virtual Channel,
FSH_SDUs contained in the Transfer Frame Secondary Header of the Transfer Frames shall
be extracted and delivered to the user. If there is a user of the VC_OCF Service for a
particular Virtual Channel, OCF_SDUs contained in the Operational Control Field of the
Transfer Frames shall be extracted and delivered to the user.
NOTE – If a gap in the Virtual Channel Frame Count is detected, a Loss Flag is optionally
delivered to the users.
220.127.116.11 An abstract model of the Virtual Channel Reception Function is illustrated in figure 4-14. CCSDS 132.0-B-1 Page 4-23 September 2003 CCSDS RECOMMENDATION FOR TM SPACE DATA LINK PROTOCOL Only one of these two entities
exists for a Virtual Channel Packet Extr.
Data Fields Virtual
Function for a
Service User VC_FSH
Service User VCA_SDUs VC_OCF
Service User FSH_SDUs OCF_SDUs Decommutation VC Frames
Virtual Channel Demultiplexing Function Figure 4-14: Abstract Model of Virtual Channel Reception Function
4.3.4 VIRTUAL CHANNEL DEMULTIPLEXING FUNCTION
18.104.22.168 The Virtual Channel Demultiplexing Function shall be used to demultiplex Transfer
Frames of different Virtual Channels of a Master Channel.
NOTE – There is an instance of the Virtual Channel Demultiplexing Function for each
Master Channel that has multiple Virtual Channels.
22.214.171.124 The Virtual Channel Demultiplexing Function shall examine the VCID in the
incoming stream of Transfer Frames and shall route them to the instances of the Virtual
Channel Reception Function and, if present, to the Virtual Channel Frame Service users.
1 If a gap in the Virtual Channel Frame Count is detected, a Loss Flag is optionally
delivered to the users. 2 Transfer Frames with an invalid VCID are discarded. 126.96.36.199 An abstract model of the Virtual Channel Multiplexing Function is illustrated in
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- Spring '14