Non-standalone coverage status determination
This disclosure provides systems, methods and apparatuses for measurement of cells and determination of a non-standalone (NSA) coverage status using an NSA coverage database. The NSA coverage database may indicate candidate frequencies of New Radio (NR) cells that provide NSA coverage corresponding to a given Long Term Evolution (LTE) serving cell. The NSA coverage database may also indicate whether a system information block 1 (SIB1) has been previously received on a candidate frequency. The user equipment (UE) may perform measurement of candidate frequencies using the NSA coverage database, and may identify cases where a cell not providing NSA coverage has a same candidate frequency as a cell providing NSA coverage using the indication of whether SIB1 has been previously received on a candidate frequency.
1 . A method of wireless communication performed by an apparatus of a user equipment (UE), comprising:
receiving a request to identify cells associated with a non-standalone (NSA) coverage status;
measuring a set of frequencies, associated with a Long Term Evolution (LTE) cell, referenced by an NSA coverage database,
wherein the NSA coverage database is maintained by the UE; and
providing information indicating one or more cells, of a set of cells associated with the set of frequencies, associated with the NSA coverage status,
wherein the information is associated with whether a system information block (SIB) is scheduled on the one or more cells, and
wherein the information indicates that a cell, of the one or more cells, is associated with the NSA coverage status if a synchronization signal block of the cell indicates that SIB1 transmission is scheduled for the cell and the NSA coverage database indicates that a SIB1 has been received for the cell.
2 . The method of claim 1 , wherein the synchronization signal block indicates that the SIB1 transmission is scheduled for the cell via a frequency offset parameter of the synchronization signal block.
3 . The method of claim 1 , further comprising:
identifying another cell, of the set of cells, that is not associated with the NSA coverage status when a synchronization signal block of the other cell indicates that SIB1 transmission is scheduled for the other cell and the NSA coverage database indicates that a SIB1 has not been received for the other cell.
4 . The method of claim 1 , wherein the information indicates cells associated with the NSA coverage status that satisfy at least one of:
a band criterion, or
a bandwidth threshold.
5 . The method of claim 4 , wherein the band criterion or the bandwidth threshold is indicated by the request.
6 . The method of claim 4 , wherein the band criterion or the bandwidth threshold is configured.
7 . The method of claim 1 , wherein the NSA coverage database indicates New Radio (NR) frequencies that are identified as providing NSA coverage while the UE is camped on a given LTE cell and public land mobile network (PLMN), and wherein the NSA coverage database indicates that the NR frequencies are associated with a current LTE serving cell or PLMN of the UE.
8 . The method of claim 1 , wherein the NSA coverage database indicates New Radio (NR) cells that are identified as providing NSA coverage while the UE is camped on a given LTE cell with a public land mobile network (PLMN) identifier, and wherein, if a current LTE serving cell of the UE is not identified by the NSA coverage database, the set of cells are a set of most recently identified cells of the NSA coverage database associated with a same PLMN as the current LTE serving cell.
9 . The method of claim 1 , further comprising:
providing an indication that an NSA coverage status of another cell is unknown.
10 . The method of claim 9 , wherein the NSA coverage status of the other cell is unknown if:
the UE is in a connected mode,
the UE is associated with a 2G network or a 3G network, or
there are no frequency entries in the NSA coverage database.
11 . The method of claim 1 , wherein the NSA coverage status indicates that a cell, associated with the NSA coverage status, can provide NSA service in a dual connectivity mode.
12 . A user equipment (UE), comprising:
a processing system configured to:
obtain a request to identify cells associated with a non-standalone (NSA) coverage status;
measure a set of frequencies, associated with a Long Term Evolution (LTE) cell, referenced by an NSA coverage database maintained by the UE; and
output information indicating one or more cells, of a set of cells associated with the set of frequencies, associated with the NSA coverage status,
wherein the information is associated with whether a system information block (SIB) is scheduled on the one or more cells, and
wherein the information indicates that a cell, of the one or more cells, is associated with the NSA coverage status if a synchronization signal block of the cell indicates that SIB1 transmission is scheduled for the cell and the NSA coverage database indicates that a SIB1 has been received for the cell.
13 . The UE of claim 12 , wherein the synchronization signal block indicates that the SIB1 transmission is scheduled for the cell via a frequency offset parameter of the synchronization signal block.
14 . The UE of claim 12 , wherein the processing system is configured to:
identify another cell, of the set of cells, that is not associated with the NSA coverage status when a synchronization signal block of the other cell indicates that SIB1 transmission is scheduled for the other cell and the NSA coverage database indicates that a SIB1 has not been received for the other cell.
15 . The UE of claim 12 , wherein the information indicates cells associated with the NSA coverage status that satisfy at least one of:
a band criterion, or
a bandwidth threshold.
16 . The UE of claim 15 , wherein the band criterion or the bandwidth threshold is indicated by the request.
17 . The UE of claim 15 , wherein the band criterion or the bandwidth threshold is configured.
18 . The UE of claim 12 , wherein the NSA coverage database indicates New Radio (NR) frequencies that are identified as providing NSA coverage while the UE is camped on a given LTE cell and public land mobile network (PLMN), and wherein the NSA coverage database indicates that the NR frequencies are associated with a current LTE serving cell or PLMN of the UE.
19 . The UE of claim 12 , wherein the NSA coverage database indicates New Radio (NR) cells that are identified as providing NSA coverage while the UE is camped on a given LTE cell with a public land mobile network (PLMN) identifier, and wherein, if a current LTE serving cell of the UE is not identified by the NSA coverage database, the set of cells are a set of most recently identified cells of the NSA coverage database associated with a same PLMN as the current LTE serving cell.
20 . The UE of claim 12 , wherein the processing system is configured to:
output an indication that an NSA coverage status of another cell is unknown.
21 . The UE of claim 20 , wherein the NSA coverage status of the other cell is unknown if:
the UE is in a connected mode,
the UE is associated with a 2G network or a 3G network, or
there are no frequency entries in the NSA coverage database.
22 . The UE of claim 12 , wherein the NSA coverage status indicates that a cell, associated with the NSA coverage status, can provide NSA service in a dual connectivity mode.
23 . A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising:
one or more instructions that, when executed by one or more processors of a user equipment (UE), cause the UE to:
receive a request to identify cells associated with a non-standalone (NSA) coverage status;
measure a set of frequencies, associated with a Long Term Evolution (LTE) cell, referenced by an NSA coverage database maintained by the UE; and
provide information indicating one or more cells, of a set of cells associated with the set of frequencies, associated with the NSA coverage status,
wherein the information is associated with whether a system information block (SIB) is scheduled on the one or more cells, and
wherein the information indicates that a cell, of the one or more cells, is associated with the NSA coverage status if a synchronization signal block of the cell indicates that SIB1 transmission is scheduled for the cell and the NSA coverage database indicates that a SIB1 has been received for the cell.
24 . The non-transitory computer-readable medium of claim 23 , wherein the synchronization signal block indicates that the SIB1 transmission is scheduled for the cell via a frequency offset parameter of the synchronization signal block.
25 . The non-transitory computer-readable medium of claim 23 , wherein the one or more instructions further cause the UE to:
identify another cell, of the set of cells, that is not associated with the NSA coverage status when a synchronization signal block of the other cell indicates that SIB1 transmission is scheduled for the other cell and the NSA coverage database indicates that a SIB1 has not been received for the other cell.
26 . The non-transitory computer-readable medium of claim 23 , wherein the NSA coverage database indicates New Radio (NR) cells that are identified as providing NSA coverage while the UE is camped on a given LTE cell with a public land mobile network (PLMN) identifier, and wherein, if a current LTE serving cell of the UE is not identified by the NSA coverage database, the set of cells are a set of most recently identified cells of the NSA coverage database associated with a same PLMN as the current LTE serving cell.
27 . An apparatus for wireless communication, comprising:
means for receiving a request to identify cells associated with a non-standalone (NSA) coverage status;
means for measuring a set of frequencies, associated with a Long Term Evolution (LTE) cell, referenced by an NSA coverage database maintained by the apparatus; and
means for providing information indicating one or more cells, of a set of cells associated with the set of frequencies, associated with the NSA coverage status,
wherein the information is associated with whether a system information block (SIB) is scheduled on the one or more cells, and
wherein the information indicates that a cell, of the one or more cells, is associated with the NSA coverage status if a synchronization signal block of the cell indicates that SIB1 transmission is scheduled for the cell and the NSA coverage database indicates that a SIB1 has been received for the cell.
28 . The apparatus of claim 27 , wherein the synchronization signal block indicates that the SIB1 transmission is scheduled for the cell via a frequency offset parameter of the synchronization signal block.
29 . The apparatus of claim 27 , further comprising:
means for identifying another cell, of the set of cells, that is not associated with the NSA coverage status when a synchronization signal block of the other cell indicates that SIB1 transmission is scheduled for the other cell and the NSA coverage database indicates that a SIB1 has not been received for the other cell.
30 . The apparatus of claim 27 , wherein the NSA coverage database indicates New Radio (NR) cells that are identified as providing NSA coverage while the apparatus is camped on a given LTE cell with a public land mobile network (PLMN) identifier, and wherein, if a current LTE serving cell of the apparatus is not identified by the NSA coverage database, the set of cells are a set of most recently identified cells of the NSA coverage database associated with a same PLMN as the current LTE serving cell.
31 . A method of wireless communication performed by an apparatus of a user equipment (UE), comprising:
receiving a request to identify cells associated with a non-standalone (NSA) coverage status;
measuring a set of frequencies, associated with a Long Term Evolution (LTE) cell, referenced by an NSA coverage database,
wherein the NSA coverage database is maintained by the UE,
wherein the NSA coverage database indicates New Radio (NR) cells that are identified as providing NSA coverage while the UE is camped on a given LTE cell with a public land mobile network (PLMN) identifier, and
wherein, if a current LTE serving cell of the UE is not identified by the NSA coverage database, a set of cells associated with the set of frequencies are a set of most recently added cells of the NSA coverage database as indicated by corresponding time stamps and associated with a same PLMN as the current LTE serving cell; and
providing information indicating one or more cells, of the set of cells associated with the set of frequencies, associated with the NSA coverage status,
wherein the information, indicating the one or more cells, is associated with whether a system information block (SIB) is scheduled on the one or more cells.
32 . The method of claim 31 , wherein the NSA coverage database indicates NR frequencies that are identified as providing NSA coverage while the UE is camped on the given LTE cell.
33 . The method of claim 31 , wherein the NSA coverage database indicates NR frequencies associated with the current LTE serving cell.
34 . A method of wireless communication performed by an apparatus of a user equipment (UE), comprising:
receiving a request to identify cells associated with a non-standalone (NSA) coverage status;
measuring a set of frequencies, associated with a Long Term Evolution (LTE) cell, referenced by an NSA coverage database,
wherein the NSA coverage database is maintained by the UE;
identifying a cell, of a set of cells associated with the set of frequencies, that is not associated with the NSA coverage status when a synchronization signal block (SSB) of the cell indicates that system information block 1 (SIB1) transmission is scheduled for the cell and the NSA coverage database indicates that a SIB1 has not been received for the cell; and
providing information indicating one or more cells, of the set of cells associated with the set of frequencies, associated with the NSA coverage status,
wherein the information, indicating the one or more cells, is associated with whether a SIB is scheduled on the one or more cells.
35 . A user equipment (UE), comprising:
a processing system configured to:
obtain a request to identify cells associated with a non-standalone (NSA) coverage status;
measure a set of frequencies, associated with a Long Term Evolution (LTE) cell, referenced by an NSA coverage database maintained by the UE,
wherein the NSA coverage database indicates New Radio (NR) cells that are identified as providing NSA coverage while the UE is camped on a given LTE cell with a public land mobile network (PLMN) identifier, and
wherein, if a current LTE serving cell of the UE is not identified by the NSA coverage database, a set of cells associated with the set of frequencies are a set of most recently added cells of the NSA coverage database as indicated by corresponding time stamps and associated with a same PLMN as the current LTE serving cell; and
output information indicating one or more cells, of the set of cells associated with the set of frequencies, associated with the NSA coverage status,
wherein the information, indicating the one or more cells, is associated with whether a system information block (SIB) is scheduled on the one or more cells.
36 . A user equipment (UE), comprising:
a processing system configured to:
obtain a request to identify cells associated with a non-standalone (NSA) coverage status;
measure a set of frequencies, associated with a Long Term Evolution (LTE) cell, referenced by an NSA coverage database maintained by the UE;
identify a cell, of a set of cells associated with the set of frequencies, that is not associated with the NSA coverage status when a synchronization signal block (SSB) of the cell indicates that system information block 1 (SIB1) transmission is scheduled for the cell and the NSA coverage database indicates that a SIB1 has not been received for the cell; and
output information indicating one or more cells, of the set of cells associated with the set of frequencies, associated with the NSA coverage status,
wherein the information, indicating the one or more cells, is associated with whether a SIB is scheduled on the one or more cells.
37 . The UE of claim 36 , wherein the one or more cells are associated with the NSA coverage status when a SSB of the one or more cells indicates that SIB1 transmission is not scheduled for the one or more cells and the NSA coverage database indicates that a SIB1 has not been transmitted for the cell.
38 . The UE of claim 36 , wherein the one or more cells are associated with the NSA coverage status when a SSB of the one or more cells indicates that SIB1 transmission is scheduled for the one or more cells and the NSA coverage database indicates that a SIB1 has been transmitted for the cell.