Request primitive is the service request primitive

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Unformatted text preview: r to the service user at the receiving end to deliver a Frame. A4.2 A4.2.1 ChannelAccess.request Function The ChannelAccess.request primitive is the service request primitive for this service. A4.2.2 Semantics The ChannelAccess.request primitive shall provide a parameter as follows: ChannelAccess.request A4.2.3 (Frame) When Generated The ChannelAccess.request primitive is passed to the service provider to request it to process and send the Frame. CCSDS 131.0-B-2 Page A-2 August 2011 CCSDS RECOMMENDED STANDARD FOR TM SYNCHRONIZATION AND CHANNEL CODING A4.2.4 Effect On Receipt Receipt of the ChannelAccess.request primitive causes the service provider to perform the functions described in 2.3.1 and to transfer the resulting channel symbols. A4.3 A4.3.1 ChannelAccess.indication Function The ChannelAccess.indication primitive is the service indication primitive for this service. A4.3.2 Semantics The ChannelAccess.indication primitive shall provide parameters as follows: ChannelAccess.indication A4.3.3 (Frame, Quality Indicator, Sequence Indicator) When Generated The ChannelAccess.indication primitive is passed from the service provider to the service user at the receiving end to deliver a Frame. A4.3.4 Effect On Receipt The effect of receipt of the ChannelAccess.indication primitive by the service user is undefined. CCSDS 131.0-B-2 Page A-3 August 2011 CCSDS RECOMMENDED STANDARD FOR TM SYNCHRONIZATION AND CHANNEL CODING ANNEX B SECURITY, SANA, AND PATENT CONSIDERATIONS (INFORMATIVE) B1 B1.1 SECURITY CONSIDERATIONS SECURITY BACKGROUND It is assumed that security is provided by encryption, authentication methods, and access control to be performed at higher layers (application and/or transport layers). Mission and service providers are expected to select from recommended security methods, suitable to the specific application profile. Specification of these security methods and other security provisions is outside the scope of this Recommended Standard. The coding layer has the objective of delivering data with the minimum possible amount of residual errors. An LDPC, Reed-Solomon, or other cod...
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This document was uploaded on 03/06/2014.

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