Cell reselection for new radio—unlicensed

1. A baseband processor comprising:

processing circuitry to:

select a candidate cell based on a measured quality metric;

decode a master information block (MIB) to determine system information broadcast 1 (SIB1) information;

determine that an SIB1 is co-located with a discovery reference signal (DRS) of the candidate cell;

decode, based on the SIB1 information and determination that the SIB1 is co-located with the DRS, the SIB1 to determine at least one public land mobile network (PLMN) identity (ID) associated with the candidate cell;

compare the at least one PLMN ID with one or more PLMN IDs associated with a source cell; and

determine whether to perform cell reselection from the source cell to the candidate cell based on the comparison of the at least one PLMN ID with the one or more PLMN IDs; and

interface circuitry coupled with the processing circuitry, the interface circuitry to communicatively couple the processing circuitry with a component of an apparatus.

2. The baseband processor of claim 1 , wherein the processing circuitry is further to: determine, based on comparison of the at least one PLMN ID with the one or more PLMN IDs, a first PLMN ID is included in both the at least one PLMN ID and the one or more PLMN IDs; and determine, based on determination that the first PLMN ID is included in both the at least one PLMN ID and the one or more PLMN IDs, to perform the cell reselection from the source cell to the candidate cell.

3. The baseband processor of claim 1 , wherein the processing circuitry is further to: perform the cell reselection based on the determination to perform the cell reselection.

4. The baseband processor of claim 1 , wherein the processing circuitry is further to: determine, based on comparison of the at least one PLMN ID with the one or more PLMN IDs, that no PLMN IDs are in both the at least one PLMN ID and the one or more PLMN IDs; and determine, based on determination that the no PLMN IDs are in both the at least one PLMN ID and the one or more PLMN IDs, not to perform the cell reselection from the source cell to the candidate cell.

5. The baseband processor of claim 4 , wherein the candidate cell is a first candidate cell, the measured quality metric is a first measured quality metric, and, based on determination not to perform, the processing circuitry is further to:

select, based on a second measured quality metric, a second candidate cell from a set of candidate cells that also includes the first candidate cell;

determine one or more PLMN IDs associated with the second candidate cell;

compare the at least one PLMN ID with the one or more PLMN IDs associated with the second candidate cell; and

determine whether to perform cell re-selection to the second candidate cell based on the comparison of the at least one PLMN ID with the one or more PLMN IDs associated with the second candidate cell.

6. The baseband processor of claim 1 , wherein, to determine that the SIB1 is co-located with the DRS, a user equipment (UE) is to determine a time allocation of the SIB1 is within a predefined threshold from a time allocation of the DRS.

7. One or more non-transitory storage-media having instructions that, when executed, cause processing circuitry to:

select a target cell from one or more candidate cells based on a measured quality metric;

decode a master information block (MIB) to extract system information broadcast 1 (SIB1) information related to the target cell; and

determine whether to perform a cell reselection from a source cell to the target cell based on the SIB1 information;

determine, based on the SIB1 information, whether a SIB1 of the target cell is co-located with a discovery reference signal (DRS) of the candidate cell; and

determine, based on determination of whether the SIB1 is co-located with the DRS, whether to check public land mobile network (PLMN) information within the SIB1 prior to performing the cell reselection.

8. The one or more non-transitory storage-media of claim 7 , wherein the instructions, when executed, further cause the processing circuitry to:

determine, based on the SIB1 information, that the SIB1 is not co-located with the DRS; and

perform, based on said determination that the SIB1 is not co-located with the DRS, the cell reselection from the source cell to the target cell without a prior check of the PLMN information.

9. The one or more non-transitory storage-media of claim 7 , wherein the instructions, when executed, further cause the processing circuitry to:

determine, based on the SIB1 information, that the SIB1 is co-located with the DRS;

check, based on said determination that the SIB1 is co-located with the DRS, the PLMN information in the SIB1; and

determine whether to perform the cell reselection from the source cell to the target cell based on the check of the PLMN information.

10. The one or more non-transitory storage-media of claim 9 , wherein to check the PLMN information, the processing circuitry is to:

decode the SIB1 to extract at least one PLMN identity (ID) associated with the target cell; and

determine whether any PLMN IDs of the at least one PLMN ID matches a PLMN ID associated with the source cell.

11. The one or more non-transitory storage-media of claim 10 , wherein the instructions, when executed, further cause the processing circuitry to:

determine, based on a determination that no PLMN IDs of the at least one PLMN ID matches a PLMN ID associated with the source cell, not to perform the cell reselection from the source cell to the target cell.

12. The one or more non-transitory storage-media of claim 10 , wherein the instructions, when executed, further cause the processing circuitry to:

determine, based on a determination that a first PLMN ID of the at least one PLMN ID matches a PLMN ID associated with the source cell, to perform the cell reselection from the source cell to the target cell.

13. The one or more non-transitory storage-media of claim 7 , wherein the instructions, when executed, further cause the processing circuitry to:

determine that the SIB1 is co-located with the DRS if the SIB1 is within a predefined timing threshold from the DRS.

14. The one or more non-transitory storage-media of claim 7 , wherein the measured quality metric includes a reference signal receive power (RSRP) metric, a reference signal receive quality (RSRQ) metric, or a signal-to-interference plus noise ratio (SINR) metric.

15. A method comprising:

initiating, from a radio resource control (RRC) idle or inactive state, a cell reselection procedure based on a detection of one or more quality metrics associated with a serving cell being below a predetermined threshold;

selecting a target cell for reselection;

acquiring system information related to the target cell;

detecting, based on the system information, a network condition, wherein the network condition is that: a system information block 1 (SIB1) of the target cell is not co-located with a discovery reference signal (DRS) of the target cell; and

applying a cell reselection without a prior check of public land mobile network (PLMN) information based on the detection of the network condition.

16. The method of claim 15 , wherein acquiring the system information comprises:

decoding a master information block (MIB) to obtain timing allocation information related to the SIB1.

17. The method of claim 15 , wherein acquiring the system information comprises:

decoding the SIB1 to determine PLMN information for the target cell.