IP Library › Granted Patent US 12,143,872
Granted Patent B2
US 12,143,872 · App. 17/429,877 · Granted Nov 12, 2024

Reporting of successful handover to a target cell

Inventors: Ali Parichehrehteroujeni (Linköping, SE); Pradeepa Ramachandra (Linköping, SE); Malik Wahaj Arshad (Stockholm, SE); Icaro L. J. Da Silva (Solna, SE); Angelo Centonza (Torrenueva Costa Granada, ES); Fredrik Gunnarsson (Linköping, SE)
Assignee: Telefonaktiebolaget LM Ericsson (Publ)
H04W36/0058H04B7/0695H04W36/00837H04W36/305H04W76/19
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Quick Facts
Patent No.
US 12,143,872
App. No.
17/429,877
Granted
Nov 12, 2024
Kind
B2
Abstract

A method performed by a wireless device includes, in response to a successful handover procedure, compiling a successful handover report comprising state information of the wireless device. The successful handover report is transmitted to a target cell.

Claims (38)

1. A method performed by a wireless device for Radio Link Failures (RLF) during handovers in a New Radio (NR) access, the method comprising:

in response to a successful handover procedure, compiling a successful handover report comprising state information of the wireless device, the successful handover report comprising information indicating that the wireless device is in near-RLF condition and information about a radio link control (RLC) retransmission counter, the successful handover procedure occurring before reaching a maximum RLC retransmission counter; and

transmitting the successful handover report to a target cell.

2. The method of claim 1 , further comprising:

receiving a configuration for the successful handover report, the configuration comprising at least one successful handover triggering condition.

3. A method performed by a network node for Radio Link Failures (RLF) during handovers in a New Radio (NR) access, the method comprising:

receiving a successful handover report associated with a successful handover by a wireless device, the successful handover report comprising information indicating that the wireless device is in near-RLF condition and information about a radio link control (RLC) retransmission counter, the successful handover procedure occurring before reaching a maximum RLC retransmission counter; and

performing one or more operations based on information in the successful handover report.

4. A wireless device configured for Radio Link Failures (RLF) during handovers in a New Radio (NR) access comprising:

processing circuitry configured to:

in response to a successful handover procedure, compile a successful handover report comprising state information of the wireless device, the successful handover report comprising information indicating that the wireless device is in near-RLF condition and information about a radio link control (RLC) retransmission counter, the successful handover procedure occurring before reaching a maximum RLC retransmission counter; and

transmit the successful handover report to a target cell.

5. The wireless device of claim 4 , wherein the processing circuitry is configured to receive a configuration for the successful handover report, the configuration comprising at least one successful handover triggering condition.

6. The wireless device of claim 4 , wherein the processing circuitry is configured to determine whether at least one successful handover report trigger condition has been met.

7. The wireless device of claim 4 , wherein the processing circuitry is configured to receive a request for the successful handover report from the target cell, and wherein the successful handover report is transmitted to the target cell in response to the received request.

8. The wireless device of claim 4 , wherein the successful handover report comprises information related to at least one of a source cell and the target cell.

9. The wireless device of claim 4 , wherein the successful handover

report comprises information about one or more radio link monitoring-related timers.

10. The wireless device of claim 4 , wherein the successful handover report comprises information about one or more mobility related timers.

11. The wireless device of claim 4 , wherein the processing circuitry is configured to log one or more measurements related to one or more beams configured for a beam failure detection procedure on a source cell.

12. The wireless device of claim 4 , wherein the successful handover report comprises information about beam failure detection counters.

13. The wireless device of claim 4 , wherein the successful handover report comprises one or more of:

one or more beam identities for which random access channel access was attempted;

for each beam identity, a number of random access channel access attempts;

sensor captured data or measurements; and

a speed state of the wireless device; and

position information associated with the wireless device at the time of successful handover.

14. The method of claim 4 , wherein the successful handover report comprises one or more of:

one or more reference signal received power measurements for configured reference signals for beam failure detection or radio link failure monitoring or beam failure recovery procedures at the time of successful handover;

one or more reference signal received quality measurements for configured reference signals for beam failure detection or radio link failure monitoring or beam failure recovery procedures at the time of successful handover; and

one or more signal-to-interference-plus-noise ratio measurements for configured reference signals for beam failure detection or radio link failure monitoring or beam failure recovery procedures at the time of successful handover.

15. The wireless device of claim 4 , wherein the successful handover report is included in a Handover Complete message (RRCReconfigurationComplete) sent over radio resource control from the wireless device to the target cell.

16. The wireless device of claim 4 , wherein the processing circuitry is configured to indicate presence of successful handover report to the network using a binary flag.

17. The wireless device od claim 4 wherein the successful handover report is including in a RRCRe-establishmentRequest message.

18. A network node for Radio Link Failures (RLF) during handovers in a New Radio (NR) access comprising:

processing circuitry configured to:

receive a successful handover report associated with a successful handover by a wireless device, the successful handover report comprising information indicating that the wireless device is in near-RLF condition and information about a radio link control (RLC) retransmission counter, the successful handover procedure occurring before reaching a maximum RLC retransmission counter; and

perform one or more operations based on information in the successful handover report.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 10, 2021
From: ARSHAD, MALIK WAHAJ; CENTONZA, ANGELO; DA SILVA, ICARO L.J.; GUNNARSSON, FREDRIK; PARICHEHREHTEROUJENI, ALI; RAMACHANDRA, PRADEEPA
To: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Reel/Frame 057138/0001 →
Continuity (2)
Provisional Application 62805708 · Feb 14, 2019
Related Publication 20220141725A1 · May 5, 2022
Cited By (3)
US 12,356,262 US 12,408,091 US 12,732,876