Unformatted text preview: Packet to send. 2 OID Transfer Frames may be sent on Virtual Channels that also carry valid Packets,
but it is preferred that a separate Virtual Channel be dedicated to carry Idle Transfer
Frames unless there is a need to send Idle Transfer Frames on a specific Virtual
Channel (e.g., to transmit data in the Transfer Frame Secondary Header and/or the
Operational Control Field on a specific Virtual Channel). 3 An OID Transfer Frame can be generated whenever it is necessary (even in the
middle of transmission of a Packet that is split into multiple Transfer Frames). 4 OID Data in the Transfer Frame Data Field of an OID Transfer Frame should not be
confused with the Idle Packet specified in reference . 4.1.5 OPERATIONAL CONTROL FIELD
184.108.40.206 If present, the Operational Control Field shall occupy the four octets following,
without gap, the Transfer Frame Data Field.
NOTE – The Operational Control Field is optional; its presence or absence is signaled by
the Operational Control Field Flag in the Transfer Frame Primary Header (see
220.127.116.11 If present, the Operational Control Field shall be associated with either a Master
Channel or a Virtual Channel. CCSDS 132.0-B-1 Page 4-11 September 2003 CCSDS RECOMMENDATION FOR TM SPACE DATA LINK PROTOCOL NOTE – The association of an Operational Control Field with a Master Channel allows
data to be transferred synchronized with this Master Channel. The association of
an Operational Control Field with a Virtual Channel allows data to be transferred
synchronized with this Virtual Channel.
18.104.22.168 If present, this field shall occur within every Transfer Frame transmitted through the
associated Master or Virtual Channel throughout a Mission Phase.
22.214.171.124 The leading bit of the field, i.e., bit 0, shall contain a Type Flag with the following
a) the Type Flag shall be ‘0’ if the Operational Control Field holds a Type-1-Report
which shall contain a Communications Link Control Word, the content of which is
defined in reference [B6]...
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- Spring '14
- Space Exploration, European Space Agency, Protocol data unit