Space Link Extension - Service Management - CCSDS

DRAFT RECOMMENDED STANDARD FOR SPACE LINK EXTENSION SERVICE MANAGEMENT
CSPC-16
a) For each SpaceLinkServiceRequest data set CSP-I, CM shall validate that:
1) at least one conformant resource configuration as defined in b), below, can be made
available for the complete requested space link service period as defined in c), below; or
2) if handovers are permitted, that a set of conformant resource configurations can be made
available that:
i) collectively span the requested space link service period; and
ii) mutually overlap each other by at least the minimum handover overlap specified in the
handoverOverlap parameter of the Service Agreement.
b) A ‘conformant resource configuration’ is defined as a configuration of resources that will be
available for the required time span in which:
1) the antenna satisfies all selection constraints imposed on it in the
SpaceLinkServiceRequest data set; i.e.:
i) if the SpaceLinkServiceRequest data set contains Antenna data sets that
designate both ‘acceptable’ and ‘preferred’ antennas, the antenna must be one
of the acceptable or preferred antennas;
ii) if the SpaceLinkServiceRequest data set does not contain any Antenna data
sets that designate ‘acceptable’ antennas, the antenna must be one of the allowed
antennas specified in the Service Agreement;
iii) if the SpaceLinkServiceRequest data set contains any Antenna data sets that
designate ‘unacceptable’ antennas, the antenna must not be one of the
unacceptable antennas;
2) the antenna has the aperture and associated resources to provide the required link margins
(i.e., sufficient signal strength to support the symbol rate(s) indicated by the
spaceLinkSessionProfileRef);
3) the SLE service production and transfer service provision resources required to provide the
SLE enabled transfer services specified in the referenced Space Link Session Profiles are
available for use with that antenna;
4) the antenna has a either a continuous or intermittent view of the spacecraft during the
duration of the conformant resource configuration;
5) the antenna is available for use (i.e., not otherwise committed) for the duration of the
conformant resource configuration;
6) the production resources required by each carrier requested in the SpaceLinkService-
Request are available such that the total requested duration of that carrier can be supported
by the set of conformation resource configurations, where the ‘total requested duration of a
carrier’ is the time span from the beginning of the requested space link service period plus the
carrierStartTimeOffset to the end of the requested space link service period minus
carrierStopTimeOffset for that carrier (where carrierStartTimeOffset and
carrierStopTimeOffset are specified in the corresponding Space Link Carrier Profile
component of the referenced Space Link Session Profile);
7) the resources needed to support each enabled SLS transfer service instance are available for
use from the beginning of the conformant resource configuration plus the
startTimeOffset to the end of the conformant resource configuration plus
stopTimeOffset for that transfer service (where startTimeOffset and
stopTimeOffset are specified in the corresponding transfer service mapping
component of the referenced Space Link Session Profile).
c) The ‘requested space link service period’ is a time period that starts at some time between
(spaceLinkSessionStartTime – spaceLinkSessionStartTimeLead) and
(spaceLinkSessionStartTime + spaceLinkSessionStartTimeLag), and has a
duration of at least the minimumSessionDuration, as specified in the
SpaceLinkServiceRequest data set.
NOTE – An intermittent view may occur if the spacecraft is occulted by a celestial body.
[service management validation]
CCSDS 910.11-R-2 Page 4-9 March 2008