NR CGI indication for cells without SIB 1
A second base station may transmit, to a UE, an indication of a PCI associated with the second base station. The UE may transmit, to a first base station, a measurement report corresponding to the second base station. The UE may receive, from the first base station, a request for the CGI associated with the second base station based on the PCI associated with the second base station. The UE may receive, from a second base station, a first indication of a CGI associated with the second base station via a PDCCH or a PDSCH. The UE may transmit, to a first base station, a second indication of the CGI associated with the second base station based on the received first indication of the CGI. The CGI may be an NCGI. The UE may refrain from monitoring for a SIB 1 associated with the second base station.
1 . An apparatus for wireless communication at a user equipment (UE), comprising:
memory; and
at least one processor coupled to the memory and configured to:
receive, from a second base station, a first indication of a cell global identifier (CGI) associated with the second base station via downlink control information (DCI) over a physical downlink control channel (PDCCH), wherein the first indication is outside of system information block (SIB) 1 (SIB 1), and wherein the DCI comprises the first indication of the CGI, and wherein the first indication is associated with an enablement of an automatic neighbor cell relation (ANR) function;
refrain from monitoring for the SIB 1 associated with the second base station; and
transmit, to a first base station, a second indication of the CGI associated with the second base station based on the received first indication of the CGI, wherein the second indication is outside of the SIB 1.
2 . The apparatus of claim 1 , the at least one processor being further configured to:
transmit, to the first base station, a measurement report corresponding to the second base station, the measurement report including a physical cell identity (PCI) associated with the second base station; and
receive, from the first base station, a request for the CGI associated with the second base station based on the PCI associated with the second base station.
3 . The apparatus of claim 1 , wherein the CGI associated with the second base station comprises a new radio (NR) CGI (NCGI).
4 . The apparatus of claim 1 , wherein the first base station is a serving base station of the UE.
5 . The apparatus of claim 1 , wherein the PDCCH is associated with a radio network temporary identifier (RNTI).
6 . The apparatus of claim 1 , wherein the at least one processor is configured to receive the first indication of the CGI via the PDCCH based on a subcarrier spacing (SCS) of the second base station satisfying at least one prespecified criterion or a message received from the first base station.
7 . The apparatus of claim 6 , wherein the SCS of the second base station satisfies the at least one prespecified criterion when the SCS of the second base station is a 480 kHz SCS, a 960 kHz SCS, or an SCS wider than 960 kHz.
8 . The apparatus of claim 1 , wherein the PDCCH is associated with a synchronization signal block (SSB) transmitted from the second base station.
9 . The apparatus of claim 1 , wherein the PDCCH is associated with a control resources set (CORESET) 0 or a CORESET other than the CORESET 0.
10 . The apparatus of claim 1 , wherein to receive the first indication of the CGI associated with the second base station, the at least one processor is configured to receive the first indication of the CGI associated with the second base station from the second base station via the PDCCH.
11 . The apparatus of claim 10 , wherein to receive the first indication of the CGI, the at least one processor is configured to receive the first indication of the CGI via a demodulation reference signal (DM-RS) associated with the PDCCH.
12 . The apparatus of claim 1 , further comprising a transceiver coupled to the at least one processor.
13 . A method of wireless communication at a user equipment (UE), comprising:
receiving, from a second base station, a first indication of a cell global identifier (CGI) associated with the second base station via downlink control information (DCI) over a physical downlink control channel (PDCCH), wherein the first indication is outside of system information block (SIB) 1 (SIB 1), and wherein the DCI comprises the first indication of the CGI, and wherein the first indication is associated with an enablement of an automatic neighbor cell relation (ANR) function;
refrain from monitoring for the SIB 1 associated with the second base station; and
transmitting, to a first base station, a second indication of the CGI associated with the second base station based on the received first indication of the CGI, wherein the second indication is outside of the SIB 1.