For a UE in RRC_CONNECTED, the BWPs configured by a serving cell may overlap in the frequency domain with the BWPs configured for other UEs by other cells within a carrier. Multiple SSBs may also be transmitted within the frequency span of a carrier used by the serving cell. However, from the UE perspective, each serving cell is associated to at most a single SSB. Figure B.2-1 below describes a scenario with multiple SSBs in a carrier, identifying two different cells (NCGI = 5, associated to SSB1, and NCGI = 6, associated to SSB3) with overlapping BWPs, and where RRM measurements can be configured to be performed by the UE on each of the available SSBs, i.e. SSB1, SSB2, SSB3 and SSB4.
The gNB depicted in Figure B.4-1 may be subdivided into non-NTN infrastructure gNB functions and the NTN Service Link provisioning System. The NTN infrastructure may be thought of being subdivided into the NTN Service Link provisioning System and the NTN Control function. The NTN Service Link provisioning System may consist of one or more NTN payloads and NTN Gateways.
The NTN payload is embarked on a spaceborne (or airborne) vehicle, providing a structure, power, commanding, telemetry, attitude control for the satellite (resp. HAPS) and possibly an appropriate thermal environment, radiation shielding.
The NTN Service Link provisioning System maps the NR-Uu radio protocol over radio resources of the NTN infrastructure (e.g. beams, channels, Tx power).
The NTN control function controls the spaceborne (or airborne) vehicles as well as the radio resources of the NTN infrastructure (NTN payload(s) & NTN Gateway(s)). It provides control data, e.g. Ephemeris, to the non-NTN infrastructure gNB functions of the gNB.
Provision of NTN control data to the gNB is out of 3GPP scope.
At least the following NTN related parameters are expected to be provided by O&M to the gNB for its operation:
Earth fixed beams: for each beam provided by a given NTN-payload:
The Cell identifier (NG and Uu) mapped to the beam;
The Cell's reference location (e.g. cell's center and range).
Quasi Earth fixed beams: for each beam provided by a given NTN-payload:
The Cell identifier (NG and Uu) and time window mapped to a beam;
The Cell's/beam's reference location (e.g. cell's center and range);
The time window of the successive switch overs (feeder link, service link);
The identifier and time window of all serving satellites and NTN-Gateways.
Earth moving beams: for each beam provided by a given NTN-payload:
The Uu Cell identifier mapped to a beam and mapping information to fixed geographical areas reported on NG, including information about the beams direction and motion of the beam's foot print on Earth;
Its elevation wrt NTN-payload;
Schedule of successive serving NTN-Gateways/gNBs;
Schedule of successive switch overs (feeder link, service link).