Resolution of paging collisions in multisim and C-RAT operation
Certain aspects of the present disclosure provide techniques for resolving paging collisions, for example, for a UE camped on multiple cells. In some cases, a UE detects, based on paging configurations, a conflict between configured paging occasions of at least two cells on which the UE is camped, signals an indication of the conflict to at least one of the cells, and receives information regarding a new paging configuration designed to resolve the conflict. In some cases, a UE identifies a different cell to camp on that is not subject to the conflict, wherein the different cell is not as good a candidate for cell selection as one of the conflicting cells in terms of cell selection criteria, and camps on the identified cell.
1. A method for wireless communications by a user equipment (UE), comprising:
detecting, based on paging configurations, a conflict between configured paging occasions of at least two cells on which the UE is camped;
signaling an indication of the conflict to at least one of the cells, wherein the signaling is provided via a radio resource control (RRC) message that requests at least one of a different paging frame or a different paging occasion; and
receiving information regarding a new paging configuration that resolves the detected conflict.
2. The method of claim 1 , wherein the RRC message comprises at least one of an RRC resume message or an RRC setup request message.
3. The method of claim 2 , wherein:
the RRC setup request message includes identity information of the UE for paging occasion calculation;
the UE identity information for paging occasion calculation comprises a set of least significant bits of a serving temporary mobile subscriber identity (S-TMSI) assigned the UE; and
the RRC setup request message also includes a set of most significant bits of the S-TMSI.
4. The method of claim 1 , wherein:
the indication is provided via the RRC message after moving to a connected mode in one of the cells; and
the indication included information regarding paging occasions in the other cell.
5. The method of claim 1 , wherein the request for the different paging frame or paging offset is signaled via a delta index relative to a current configured paging frame or paging occasion subject to the conflict.
6. The method of claim 1 , wherein:
the information regarding the new paging configuration is provided via the RRC message that indicates a delta index relative to a current configured paging frame or a paging occasion; and
the RRC message comprises at least one of an RRC release message or an RRC reject message.
7. The method of claim 1 , wherein the information regarding a new paging configuration comprises modified identity information for the UE.
8. The method of claim 7 , further comprising providing the modified identity information when performing a RAN-based notification area (RNA) update.
9. A method for wireless communications by a user equipment (UE), comprising:
detecting, based on paging configurations, a conflict between configured paging occasions of at least two cells on which the UE is camped;
receiving information from at least one of the cells regarding a plurality of possible paging occasions for that cell, wherein:
the information is received as a list of index values, and
the UE identifies the possible paging occasions by adding the index values to a paging frame or paging occasion; and
monitoring for paging in one of the possible paging occasions not subject to the conflict.
10. The method of claim 9 , wherein the list of index values is received via broadcast signaling.
11. A method for wireless communications by a network entity, comprising:
receiving, an indication of a conflict between configured paging occasions of at least two cells on which a user equipment (UE) is camped, wherein the indication is received from the UE via a radio resource control (RRC) message that requests at least one of a different paging frame or a different paging occasion; and
providing information regarding a new paging configuration that resolves the detected conflict.
12. The method of claim 11 , wherein:
the RRC message comprises at least one of an RRC resume message or an RRC setup request message.
13. The method of claim 12 , wherein the RRC setup request message includes identity information of the UE for paging occasion calculation.
14. The method of claim 13 , wherein:
the UE identity information for paging occasion calculation comprises a set of least significant bits of a serving temporary mobile subscriber identity (S-TMSI) assigned the UE; and
the RRC setup request message also includes a set of most significant bits of the S-TMSI.
15. The method of claim 12 , wherein:
the indication is provided via the RRC message after moving to a connected mode in one of the cells; and
the indication included information regarding paging occasions in the other cell.
16. The method of claim 12 , wherein the request for the different paging frame or paging offset is signaled via a delta index relative to a current configured paging frame or paging occasion subject to the conflict.
17. The method of claim 11 , wherein:
the RRC message indicates a delta index relative to a current configured paging frame or a paging occasion; and
the RRC message comprises at least one of an RRC release message or an RRC reject message.
18. The method of claim 11 , wherein the information regarding a new paging configuration comprises modified identity information for the UE.
19. The method of claim 18 , further comprising providing the modified identity information to other cells.
20. A method for wireless communications by a network entity, comprising:
signaling information to a user equipment (UE) regarding a plurality of possible paging occasions, wherein:
the information is signaled as a list of index values, and
the possible paging occasions are determined by adding the index values to a paging frame or paging occasion; and
paging the UE in the possible paging occasions.
21. The method of claim 20 , wherein the list of index values is provided via broadcast signaling.