Target secondary node initiated cancel of conditional PSCell change
A method ( 800 ) performed by a T-SN for cancelling a conditional PSCell, change (CPC). The method includes the T-SN receiving (s 802 ) a request for a CPC configuration for a UE, wherein the request was transmitted by a first network node (NN), and the UE is connected to the first NN and is also connected to a second NN. The method also includes the T-SM transmitting (s 804 ) to the first NN a response to the request, the response including the CPC configuration for the UE. The method further includes, after transmitting the response, the T-SN transmitting (s 806 ) to the first NN a cancellation indication indicating that the CPC configuration for the UE is cancelled.
1. A method performed by a target secondary node (T-SN) for cancelling a conditional primary secondary cell (PSCell) change, the method comprising:
receiving a request for a conditional PSCell change (CPC) configuration for a user equipment (UE), wherein the request was transmitted by a first network node (NN), and the UE is connected to the first NN and is also connected to a second NN;
transmitting to the first NN a response to the request, the response including the CPC configuration for the UE; and
after transmitting the response, transmitting to the first NN a cancellation indication indicating that the CPC configuration for the UE is cancelled.
2. The method of claim 1 , further comprising, after receiving the request, allocating resources for the UE.
3. The method of claim 2 , wherein the first NN is a master node (MN) and the second NN is a source secondary node (S-SN).
4. The method of claim 2 , wherein the second NN is a master node (MN) and the first NN is a source secondary node (S-SN).
5. The method of claim 1 , further comprising, after determining to send the cancelling indication, performing at least one of:
releasing resources that were allocated to the UE in response to receiving the request, or
stopping supervision of a timer.
6. The method of claim 1 , wherein the CPC configuration comprises an RRCReconfiguration message.
7. The method of claim 6 , wherein the RRCReconfiguration message is for a target candidate cell.
8. A method performed by a master node (MN) for cancelling a conditional primary secondary cell (PSCell) change, the method comprising:
receiving a cancellation indication transmitted by a target secondary node (T-SN) indicating that a conditional PSCell change (CPC) configuration previously provided to a user equipment (UE) is cancelled; and
after receiving the cancellation indication, reconfiguring the UE.
9. The method of claim 8 , wherein reconfiguring the UE comprises causing the UE to release the CPC configuration.
10. The method of claim 8 , wherein
the cancellation indication comprises information identifying one or more candidate PSCells served by the T-SN, and
reconfiguring the UE comprises causing the UE to release the identified candidate PSCells cells from the CPC configuration.
11. The method of claim 8 , further comprising:
after reconfiguring the UE, sending a confirmation to a source secondary node, S-SN, that the UE has been successfully reconfigured.
12. The method of claim 8 , further comprising:
after receiving the cancellation indication, transmitting to a source secondary node, S-SN, a message for indicating the cancellation.
13. The method of claim 12 , wherein the message for indicating the cancellation includes a list of cells to be cancelled.
14. The method of claim 12 , further comprising:
receiving a new Secondary Cell Group RRCReconfiguration transmitted by the S-SN.
15. The method of claim 14 , wherein the new SCG RRCReconfiguration includes a list of candidate PSCells to be released from the CPC configuration.
16. The method of claim 12 , further comprising taking into account cancelation of one or more candidate PSCells by the T-SN.
17. The method of claim 8 , further comprising:
prior to receiving the cancellation indication, transmitting to the T-SN a request for a CPC configuration; and
receiving from the T-SN a response to the CPC preparation request, the response including a CPC configuration for the UE.
18. The method of claim 17 , wherein the CPC configuration for the UE is included in an RRCReconfiguration message.
19. The method of claim 8 , further comprising:
sending a message to a S-SN indicating that PSCells previously configured in a CPC configuration and belonging to the T-SN have been released from the CPC configuration; and
receiving a message from the S-SN informing that modified CPC configuration has been taken into account.
20. A network node-( 1100 ), the network node being configured to perform a method comprising:
receiving a request for a conditional primary secondary cell (PSCell) change configuration for a user equipment (UE), wherein the request was transmitted by a first network node (NN), and the UE is connected to the first NN and is also connected to a second NN;
transmitting to the first NN a response to the request, the response including the conditional PSCell change (CPC) configuration for the UE; and
after transmitting the response, transmitting to the first NN a cancellation indication indicating that the CPC configuration for the UE is cancelled.
21. The network node of claim 20 , wherein the method further comprises, after receiving the request, allocating resources for the UE.
22. A network node, the network node being configured to perform a method comprising:
receiving a cancellation indication transmitted by a target secondary node (T-SN) indicating that a conditional primary secondary cell (PSCell) change configuration previously provided to a user equipment (UE) is cancelled; and
after receiving the cancellation indication, reconfiguring the UE.
23. The network node of claim 22 , wherein reconfiguring the UE comprises causing the UE to release the conditional PSCell change (CPC) configuration.