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Space Link Extension - Service Management - CCSDS

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DRAFT RECOMMENDED STANDARD FOR SPACE LINK EXTENSION SERVICE MANAGEMENT<br />

CSPC-16<br />

a) For each <strong>Space</strong><strong>Link</strong><strong>Service</strong>Request data set CSP-I, CM shall validate that:<br />

1) at least one conformant resource configuration as defined in b), below, can be made<br />

available for the complete requested space link service period as defined in c), below; or<br />

2) if handovers are permitted, that a set of conformant resource configurations can be made<br />

available that:<br />

i) collectively span the requested space link service period; and<br />

ii) mutually overlap each other by at least the minimum handover overlap specified in the<br />

handoverOverlap parameter of the <strong>Service</strong> Agreement.<br />

b) A ‘conformant resource configuration’ is defined as a configuration of resources that will be<br />

available for the required time span in which:<br />

1) the antenna satisfies all selection constraints imposed on it in the<br />

<strong>Space</strong><strong>Link</strong><strong>Service</strong>Request data set; i.e.:<br />

i) if the <strong>Space</strong><strong>Link</strong><strong>Service</strong>Request data set contains Antenna data sets that<br />

designate both ‘acceptable’ and ‘preferred’ antennas, the antenna must be one<br />

of the acceptable or preferred antennas;<br />

ii) if the <strong>Space</strong><strong>Link</strong><strong>Service</strong>Request data set does not contain any Antenna data<br />

sets that designate ‘acceptable’ antennas, the antenna must be one of the allowed<br />

antennas specified in the <strong>Service</strong> Agreement;<br />

iii) if the <strong>Space</strong><strong>Link</strong><strong>Service</strong>Request data set contains any Antenna data sets that<br />

designate ‘unacceptable’ antennas, the antenna must not be one of the<br />

unacceptable antennas;<br />

2) the antenna has the aperture and associated resources to provide the required link margins<br />

(i.e., sufficient signal strength to support the symbol rate(s) indicated by the<br />

space<strong>Link</strong>SessionProfileRef);<br />

3) the SLE service production and transfer service provision resources required to provide the<br />

SLE enabled transfer services specified in the referenced <strong>Space</strong> <strong>Link</strong> Session Profiles are<br />

available for use with that antenna;<br />

4) the antenna has a either a continuous or intermittent view of the spacecraft during the<br />

duration of the conformant resource configuration;<br />

5) the antenna is available for use (i.e., not otherwise committed) for the duration of the<br />

conformant resource configuration;<br />

6) the production resources required by each carrier requested in the <strong>Space</strong><strong>Link</strong><strong>Service</strong>-<br />

Request are available such that the total requested duration of that carrier can be supported<br />

by the set of conformation resource configurations, where the ‘total requested duration of a<br />

carrier’ is the time span from the beginning of the requested space link service period plus the<br />

carrierStartTimeOffset to the end of the requested space link service period minus<br />

carrierStopTimeOffset for that carrier (where carrierStartTimeOffset and<br />

carrierStopTimeOffset are specified in the corresponding <strong>Space</strong> <strong>Link</strong> Carrier Profile<br />

component of the referenced <strong>Space</strong> <strong>Link</strong> Session Profile);<br />

7) the resources needed to support each enabled SLS transfer service instance are available for<br />

use from the beginning of the conformant resource configuration plus the<br />

startTimeOffset to the end of the conformant resource configuration plus<br />

stopTimeOffset for that transfer service (where startTimeOffset and<br />

stopTimeOffset are specified in the corresponding transfer service mapping<br />

component of the referenced <strong>Space</strong> <strong>Link</strong> Session Profile).<br />

c) The ‘requested space link service period’ is a time period that starts at some time between<br />

(space<strong>Link</strong>SessionStartTime – space<strong>Link</strong>SessionStartTimeLead) and<br />

(space<strong>Link</strong>SessionStartTime + space<strong>Link</strong>SessionStartTimeLag), and has a<br />

duration of at least the minimumSessionDuration, as specified in the<br />

<strong>Space</strong><strong>Link</strong><strong>Service</strong>Request data set.<br />

NOTE – An intermittent view may occur if the spacecraft is occulted by a celestial body.<br />

[service management validation]<br />

<strong>CCSDS</strong> 910.11-R-2 Page 4-9 March 2008

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