Systems and methods for cell selection and reselection by improving system information reading procedure
Described herein are methods performed by user equipment (“UE”) for carrier aggregation deployment and organization in unlicensed bands. The method includes initiating a cell selection process with a target cell, wherein the target cell sends a plurality of information blocks, receiving a first information block, prior to reading a second information block, determining whether the target cell is suitable for the UE to camp on based on the first information block, and terminating the cell selection process when the target cell is determined to be unsuitable for camping based on the first information block. The terminating may include comparing data from the first information block to data stored in a database. The method further includes determining whether the UE is in a stationary state or is in a state of motion, and using this information to improve cell selection delay on target cell.
1. A method, comprising:
at a user equipment (“UE”):
initiating a cell selection process with a target cell, wherein the target cell sends a plurality of information blocks;
receiving the plurality of the information blocks;
reading a first information block of the plurality of information blocks;
prior to reading a second information block of the plurality of information blocks, determining whether the target cell is suitable for the UE to camp on based on the first information block;
terminating the cell selection process when the target cell is determined to be unsuitable for camping based on the first information block;
reading the second information block when it is deteimined that the target cell is suitable for camping based on the first information block;
prior to reading a third information block, determining whether the target cell is suitable for the UE to camp on based on the second information block; and
terminating the cell selection process when the target cell is determined to be unsuitable for camping based on the second information block.
2. The method of claim 1 , further comprising:
upon terminating the cell selection process, camping on a previously camped on cell.
3. The method of claim 1 , further comprising:
upon terminating the cell selection process, initiating a second cell selection process with a second target cell.
4. The method of claim 1 , wherein the first information block is read at a radio resource control (“RRC”) layer from a physical (“PHY”) layer, and the RRC and PHY layers operate as parallel tasks.
5. A user equipment (“UE”), comprising:
a non-transitory memory having a program stored thereon; and
a processor executing the program, wherein the execution of the program causes the processor to perform operations comprising:
initiating a cell selection process with a target cell, wherein the target cell sends a plurality of information blocks;
receiving the plurality of the information blocks
reading a first information block of the plurality of information blocks;
prior to reading a second information block of the plurality of information blocks,
determining whether the target cell is suitable for the UE to camp on based on the first information block;
terminating the cell selection process when the target cell is determined to be unsuitable for camping based on the first information block;
reading the second information block when it is determined that the target cell is suitable for camping based on the first information block;
prior to reading a third information block determining whether the target cell is suitable for the UE to camp on based on the second information block; and
terminating the cell selection process when the target cell is determined to be unsuitable for camping based on the second information block.
6. The UE of claim 5 , wherein the operations further comprise:
upon terminating the cell selection process, camping on a previously camped on cell.
7. The UE of claim 5 , wherein the operations further comprise:
upon terminating the cell selection process, initiating a second cell selection process with a second target cell.
8. The UE of claim 5 , wherein the first information block is read at a radio resource control (“RRC”) layer from a physical (“PHY”) layer, and the RRC and PHY layers operate as parallel tasks.
9. A method, comprising:
at a user equipment (“UE”):
determining the UE is in a stationary state;
initiating a cell selection process with a target cell, wherein the target cell sends a plurality of information blocks;
receiving the plurality of information blocks;
reading the first information block of the plurality of information blocks;
prior to reading the second information block of the plurality of information blocks, comparing data from the first information block to data stored in a database; and
when the data from the first information block matches data stored in the database,
terminating processing of further information blocks of the plurality of information blocks,
identifying the target cell as a suitable cell;
reading the second information block when it is determined that the target cell is suitable for camping based on the first information block;
prior to reading a third information block, determining whether the target cell is suitable for the UE to camp on based on the second information block; and
terminating the cell selection process when the target cell is determined to be unsuitable for camping based on the second information block.
10. The method of claim 9 , further comprising:
storing data in the database relating to information blocks of a cell that the UE is currently camped on.
11. The method of claim 9 , further comprising:
when the data from the first information block does not match data stored in the database,
processing the further information blocks of the target cell, and
determining whether the target cell is a suitable cell based on the plurality of information blocks.
12. The method of claim 11 , further comprising:
storing, when the target cell has been determined to be a suitable cell, data from the first information block in the database.
13. The method of claim 9 , further comprising:
determining the UE is in a state of motion; and
clearing the database.
14. A user equipment (“UE”), comprising:
a non-transitory memory having a program stored thereon; and
a processor executing the program, wherein the execution of the program causes the processor to perform operations comprising:
determining the UE is in a stationary state;
initiating a cell selection process with a target cell, wherein the target cell sends a plurality of information blocks;
receiving the plurality of information blocks;
reading the first information block of the plurality of information blocks;
prior to reading the second information block of the plurality of information blocks, comparing data from the first information block to data stored in a database; and
when the data from the first information block matches data stored in the database,
terminating processing of further information blocks of the plurality of information blocks, and
identifying the target cell as a suitable cell;
reading the second information block when it is determined that the target cell is suitable for camping based on the first information block;
prior to reading a third information block, determining whether the target cell is suitable for the UE to camp on based on the second information block; and
terminating the cell selection process when the target cell is determined to be unsuitable for camping based on the second information block.
15. The UE of claim 14 , further comprising:
storing data in the database relating to information blocks of a cell that the UE is currently camped on.
16. The UE of claim 14 , further comprising:
when the data from the first information block does not match data stored in the database,
processing the further information blocks of the target cell, and
determining whether the target cell is a suitable cell based on the plurality of information blocks.
17. The UE of claim 14 , further comprising:
storing, when the target cell has been determined to be a suitable cell, data from the first information block in the database.
18. The UE of claim 14 , further comprising:
determining the UE is in a state of motion; and
clearing the database.