Method and apparatus for performing access to cell
Provided are a method for a user equipment (UE) to perform access to a cell in a wireless communication, and an apparatus supporting the same. The method may include: receiving, from a first system, access control information for the first system; camping on the cell of a second system; mapping the access control information for the first system to access control information for the second system; and performing access to the cell of the second system, based on the mapped access control information for the second system.
1. A method of performing, by a user equipment (UE), an access attempt to a cell in a wireless communication system, the method comprising:
determining a type of access based on a request to access the cell;
determining an access category for the request based on the type of access;
performing an access barring check for the cell;
mapping the access category to an establishment cause based on a mapping table configured for the UE; and
based on access to the cell not being barred for the request, transmitting, to a base station of the cell, a message requesting establishment of a radio resource control (RRC) connection, the message comprising the establishment cause mapped from the access category.
2. The method of claim 1 , wherein determining the type of access comprises:
determining the type of access as related to a type of service or call for the request to access the cell.
3. The method of claim 1 , wherein determining the access category for the request comprises:
determining the access category as an integer value.
4. The method of claim 1 , wherein the establishment cause is related to at least one of mobile-originated (MO) signaling or an emergency signaling.
5. The method of claim 1 , wherein determining the access category for the request based on the type of access comprises:
determining the access category based on an application that triggers the request to access the cell.
6. The method of claim 1 , wherein determining the access category for the request based on the type of access further comprises:
determining the access category based on at least one of a type of service or a type of call for the request to access the cell.
7. The method of claim 6 , wherein the type of service is at least one of a voice service, a video service, or a short message service (SMS).
8. The method of claim 6 , wherein the type of call is at least one of an emergency call or a high priority call.
9. The method of claim 1 , wherein determining the access category for the request based on the type of access further comprises:
determining the access category based on a configuration of the UE.
10. The method of claim 9 , wherein the configuration of the UE relates to a priority level of the UE.
11. The method of claim 1 , wherein determining the access category for the request based on the type of access further comprises:
determining the access category based on a signaling procedure related to at least one of a non-access stratum (NAS) layer of the UE or an RRC layer of the UE.
12. The method of claim 1 , wherein the mapping table is pre-configured by the UE.
13. The method of claim 1 , further comprising:
receiving the mapping table from the base station.
14. The method of claim 1 , further comprising:
providing the access category from a non-access stratum (NAS) layer of the UE to an RRC layer of the UE.
15. The method of claim 1 , further comprising:
providing the establishment cause from a non-access stratum (NAS) layer of the UE to an RRC layer of the UE.
16. The method of claim 1 , further comprising:
receiving, from the base station, barring information that comprises at least one of a barring factor, a barring time, or a bitmap.
17. A user equipment (UE) configured to perform an access attempt to a cell in a wireless communication system, the UE comprising:
a transceiver;
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:
determining a type of access based on a request to access the cell;
determining an access category for the request based on the type of access;
performing an access barring check for the cell;
mapping the access category to an establishment cause based on a mapping table configured for the UE; and
based on access to the cell not being barred for the request, transmitting, to a base station of the cell, a message requesting establishment of a radio resource control (RRC) connection, the message comprising the establishment cause mapped from the access category.