Space Link Extension - Service Management - CCSDS

DRAFT RECOMMENDED STANDARD FOR SPACE LINK EXTENSION SERVICE MANAGEMENT
UM invokes the ADD_SPACE_LINK_SESSION_PROFILE, ADD_SLS_TRANSFER_-
SERVICE_PROFILE, ADD_RETRIEVAL_TRANSFER_SERVICE_PROFILE, or
ADD_SPACE_LINK_EVENTS_PROFILE operation to add a new profile to the set of
Configuration Profiles on record at the SLE Complex. Each new Profile is validated by CM
against the previously negotiated Service Agreement to determine if the parameter values are
within the scope of the agreement. If they are, CM accepts the new profile and informs UM.
If the request is invalid, CM rejects the new profile and informs UM, citing the reason(s) for
rejection.
UM invokes the DELETE_SPACE_LINK_SESSION_PROFILE, DELETE_-
TRANSFER_SERVICE_PROFILE, or DELETE_SPACE_LINK_EVENTS_PROFILE
operation to delete no-longer-needed profiles. Normally CM will comply with the
invocation, delete the profile, and confirm the deletion to UM. However, under some
circumstances (such as the Profile being cited by an active or forthcoming Service Package),
CM will refuse to delete and will inform UM of the failure of the deletion invocation and
provide the reason for failure.
UM invokes the QUERY_SPACE_LINK_SESSION_PROFILE, QUERY_TRANSFER_-
SERVICE_PROFILE or QUERY_SPACE_LINK_EVENTS_PROFILE operation to query
the content of a specified profile on record at CM. This invocation provides a mechanism for
validating consistency between UM and CM databases.
The configuration parameters explicitly specified in the
ADD_SPACE_LINK_SESSION_PROFILE (ASLSP) and QSLSP operations, and their
allowed ranges of values, are conformant with the CCSDS standards for RF and modulation
systems (reference [15]), channel coding (references [5] and [7]), telemetry framing
(references [3] and [6]) and the RAF, RCF, and communications link transmission unit
(CLTU) SLE transfer services (references [9], [10], and [12]). However, it is possible for
space link service providers to use SLE-SM even though their services are not conformant
with some or all of these CCSDS standards. The ASLSP operation supports the submission
of Carrier Profiles characterizing other space link service configurations, as long as UM and
CM agree on the format and content of those Carrier Profiles by means outside the scope of
this standard. Similarly, the QSLSP operation allows for UM to query the contents of such
bilaterally agreed Carrier Profiles.
2.2.5 TRAJECTORY PREDICTION SERVICE
The SLE-SM Trajectory Prediction operations are used to manage the spacecraft trajectory
data that are employed by CM to derive the pointing angles and Doppler compensation
settings needed to acquire the spacecraft.
There are three Trajectory Prediction operations that CM can perform when invoked by UM:
a) ADD_TRAJECTORY_PREDICTION (ATP)—to add a new Trajectory Prediction at
CM;
CCSDS 910.11-R-2 Page 2-12 March 2008