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1. WO2020193626 - OPTIONAL SENDING OF COMPLETE MESSAGE IN CONDITIONAL HANDOVER

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS

1. A method, in a wireless device (50) operating in a wireless communication network, the method comprising:

receiving (602), from a source node (30), a conditional handover command, the

conditional handover command including or being associated with a triggering condition for execution of handover to a target cell or target beam;

detecting (604), that the triggering condition is met;

if a conditional handover configuration is not yet completed, executing (606) the

handover to the target cell or beam without sending a message confirming completion of a conditional handover configuration to the source node, and otherwise sending the message confirming completion of the conditional handover configuration to the source node.

2. The method of claim 1, wherein sending the message confirming completion of the conditional handover configuration is performed before or in conjunction with executing the handover to the target cell or target beam.

3. The method of any of claims 1-2, wherein if the wireless device (50) executes the handover to the target cell or beam without sending the message confirming completion of the conditional handover configuration, the wireless device further refrains from sending a hybrid automatic repeat request, HARQ, acknowledgment in response to the conditional handover command.

4. The method of any of claims 1-3, wherein said executing the handover without sending the message confirming completion of conditional handover configuration is conditioned upon determining that the conditional handover message includes an indication that skipping the message confirming completion of conditional handover condition is allowed.

5. The method of any of claims 1-4, wherein executing the handover comprises performing a random access procedure towards the target cell or beam, and sending a handover complete message towards the target cell or beam after completing the random access procedure.

6. The method of any of claims 1-5, wherein after receiving the conditional handover command, the wireless device (50) adds the target cell or target beam to a list of candidate cells or candidate beams and starts monitoring the triggering condition received together with the conditional handover command.

7. The method of any of claims 1-6, wherein the source node (30) is a first eNB, wherein the target cell or target beam is provided by a second eNB, wherein the conditional handover command is a RRC Connection Reconfiguration Message including Mobility Control Information, and the message confirming completion of the conditional handover

configuration is a RRC Connection Reconfiguration Complete message according to 3GPP LTE specifications.

8. The method of any of claims 1-6, wherein the source node (30) is a first gNB, wherein the target cell or target beam is provided by a second gNB, wherein the conditional handover command is a RRC Reconfiguration Message including reconfiguration with Sync, and the message confirming completion of the conditional handover configuration is a RRC

Reconfiguration Complete message according to 3GPP new radio, NR, specifications.

9. A wireless device (50) adapted to perform the methods of any of claims 1-8.

10. A wireless device (50) comprising transceiver circuitry and processing circuitry operatively associated with the transceiver circuitry and configured to perform the methods of any of claims 1-8.

11. A computer program (66) comprising instructions that, when executed on at least one processing circuit (52), cause the at least one processing circuit to carry out the method according to any one of claims 1-8.

12. A carrier containing the computer program of claim 11, wherein the carrier is one of an electronic signal, optical signal, radio signal, or computer readable storage medium.