Unformatted text preview: e signal):
Directive Notification (Request Identifier, GVCID, Notification Type).
For Notification Type, see 4.2.
220.127.116.11.4 Asynchronous Notifications The asynchronous notification signal shall be issued by FOP-1 to notify the Higher
Procedures of an event that occurs asynchronously with requests. Each asynchronous
notification signal shall correspond to an Async_Notify.indication primitive defined in
reference . An asynchronous notification signal issued by FOP-1 shall be translated by
the Higher Procedures to an Async_Notify.indication primitive, which shall then be given to
The asynchronous notification signal shall have the following format (the items in
parentheses are parameters of the signal):
Asynchronous Notification (GVCID, Notification Type, Notification Qualifier).
For Notification Type and Notification Qualifier, see 4.3.
18.104.22.168.1 FDU Transfer Signals
General The FDU transfer signals shall be used to transfer FDUs on a Virtual Channel. The FDU
transfer signals exchanged between FOP-1 and the Higher Procedures are classified into two
a) Request to Transfer FDU;
b) transfer notifications.
22.214.171.124.2 Request to Transfer FDU The ‘Request to Transfer FDU’ signal shall be issued by the Higher Procedures to request
FOP-1 to transfer an FDU. When a service primitive is issued by the user to request transfer
of a service data unit, the Higher Procedures shall perform necessary operations to generate
one or more FDUs, which may include blocking or segmentation, and shall generate a
‘Request to Transfer FDU’ signal to request transfer of each FDU. CCSDS 232.1-B-2 Page 3-4 September 2010 RECOMMENDED STANDARD FOR COMMUNICATIONS OPERATION PROCEDURE-1 NOTE – The ‘Request to Transfer FDU’ signal is issued by the Higher Procedures for an
FDU, while the service request primitive is issued by the service user for a
service data unit. One service request primitive may not result in one ‘Request to
Transfer FDU’ signal because blocking or segmentation may be performed by the
Higher Procedures (see reference ).
The ‘Request to Transfer FDU’ signal shall have the following format (the items in
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