For notification type see 42 32224 asynchronous

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Unformatted text preview: e signal): Directive Notification (Request Identifier, GVCID, Notification Type). For Notification Type, see 4.2. 3.2.2.2.4 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 [3]. 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 user. 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. 3.2.2.3 3.2.2.3.1 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 categories: a) Request to Transfer FDU; b) transfer notifications. 3.2.2.3.2 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 [3]). The ‘Request to Transfer FDU’ signal shall have the following format (the items in parentheses...
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This document was uploaded on 03/06/2014.

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