5G NR efficient FR1/FR2 operation

Patent metadata

Field	Value
Publication number	US-11917464-B2
Application number	US-202117331331-A
Country	US
Kind code	B2
Filing date	May 26, 2021
Priority date	Jun 5, 2020
Publication date	Feb 27, 2024
Grant date	Feb 27, 2024

Abstract

Apparatuses, systems, and methods for RACH procedures to avoid excessive handover/secondary cell group failures. A base station may declare a handover and/or secondary cell group (SCG) failure and may determine that a failure threshold has been met. The base station may perform a remedial action in response to meeting the failure threshold. The failure threshold may be multi-dimensional, where a first dimension is associated with a number of handover/SCG failures and where a second dimension is associated with a time period in which the number of handover/SCG failures occurred. Further, a third dimension may be associated with a UE mobility state and a fourth dimension may be associated with whether the UE is using FR1 or FR2. The remedial action in response to meeting the failure threshold may include the base station suspending transmission of measurement object configurations for a specified period of time.

First claim

What is claimed is:

1. A base station, comprising:
at least one antenna;
at least one radio, wherein the at least one radio is configured to perform cellular communication using at least one radio access technology (RAT); and
one or more processors coupled to the at least one radio, wherein the one or more processors and the at least one radio are configured to perform communications;
wherein the one or more processors are configured to cause the base station to:
receive, from a user equipment device (UE), a secondary cell group (SCG) failure indication, wherein the SCG failure indication includes a cause code requesting measurement object configurations for the UE be suspended;
declare, in response to the SCG failure indication, a handover and/or secondary cell group (SCG) failure;
determine that a failure threshold has been met; and
perform a remedial action in response to meeting the failure threshold.

2. The base station of claim 1 ,
wherein, to perform the remedial action in response to meeting the failure threshold, the one or more processors are further configured to cause the base station to:
suspend transmission of measurement object configurations for a specified period of time in response to reception of the SCG failure indication.

3. The base station of claim 1 ,
wherein the failure threshold is multi-dimensional, with a first dimension is associated with a number of handover/SCG failures and with a second dimension is associated with a time period in which the number of handover/SCG failures occurred.

4. The base station of claim 1 ,
wherein, to determine that the failure threshold has been met, the one or more processors are further configured to cause the base station to:
receive, from a user equipment device (UE), capabilities associated with the failure threshold, wherein the capabilities include at least one of:
power requirements of the UE;
power levels of the UE; or
radio conditions at the UE; and

determine the failure threshold based, at least in part, on the capabilities.

5. The base station of claim 4 ,
wherein a time period in which a number of handover and/or SCG failures occurred is determined based, at least in part, on the capabilities.

6. The base station of claim 1 ,
wherein, to declare the handover and/or SCG failure, the one or more processors are further configured to cause the base station to:
transmit a specified number of handover commands without a successful random access control channel (RACH) procedure.

7. The base station of claim 1 ,
wherein, to determine that the failure threshold has been met, the one or more processors are further configured to cause the base station to:
determine that a number of handover and/or SCG failures have occurred within a time period.

8. An apparatus, comprising:
a memory; and
at least one processor in communication with the memory, wherein the at least one processor is configured to:
receive, from a user equipment device (UE), a secondary cell group (SCG) failure indication, wherein the SCG failure indication includes a cause code requesting measurement object configurations for the UE be suspended;
declare, in response to the SCG failure indication, a handover and/or SCG failure;
determine that a failure threshold has been met; and
perform a remedial action in response to meeting the failure threshold.

9. The apparatus of claim 8 ,
wherein, to perform the remedial action in response to meeting the failure threshold, the at least one processor is further configured to:
suspend transmission of measurement object configurations for a specified period of time based on receiving the SCG failure indication.

10. The apparatus of claim 8 ,
wherein the failure threshold is multi-dimensional, with a first dimension is associated with a number of handover/SCG failures and with a second dimension is associated with a time period in which the number of handover/SCG failures occurred.

11. The apparatus of claim 8 ,
wherein, to determine that the failure threshold has been met, the at least one processor is further configured to:
receive, from the UE, capabilities associated with the failure threshold, wherein the capabilities include at least one of:
power requirements of the UE;
power levels of the UE; or radio conditions at the UE; and
determine the failure threshold based, at least in part, on the capabilities.

12. The apparatus of claim 11 ,
wherein a time period in which a number of handover and/or SCG failures occurred is determined based, at least in part, on the capabilities.

13. The apparatus of claim 8 ,
wherein, to declare the handover and/or SCG failure, the at least one processor is further configured to:
transmit a specified number of handover commands without a successful random access control channel (RACH) procedure.

14. The apparatus of claim 8 ,
wherein, to determine that the failure threshold has been met, the at least one processor is further configured to:
determine that a number of handover and/or SCG failures have occurred within a time period.

15. A non-transitory computer readable memory medium storing program instructions executable by processing circuitry to cause a network entity to:
receive, from a user equipment device (UE), a secondary cell group (SCG) failure indication, wherein the SCG failure indication includes a cause code trequesting measurement object configurations for the UE be suspended;
declare a handover and/or SCG failure;
determine that a failure threshold has been met; and
perform a remedial action in response to meeting the failure threshold, including suspend transmission of measurement object configurations for a specified period of time based on receiving the SCG failure indication.

16. The non-transitory computer readable memory medium of claim 15 ,
wherein declaration of the handover and/or SCG failure is based on receiving the SCG failure indication.

17. The non-transitory computer readable memory medium of claim 15 ,
wherein the failure threshold is multi-dimensional.

18. The non-transitory computer readable memory medium of claim 17 ,
wherein a first dimension is associated with a number of handover/SCG failures, and wherein a second dimension is associated with a time period in which the number of handover/SCG failures occurred.

19. The non-transitory computer readable memory medium of claim 18 , wherein a third dimension is associated with a UE mobility state, and wherein a fourth dimension is associated with whether the UE is using frequency range 1 (FR1) or frequency range 2 (FR2).

20. The non-transitory computer readable memory medium of claim 15 , wherein, to determine that the failure threshold has been met, the program instructions are further executable by the processing circuitry to cause the network entity:
receive, from the UE, capabilities associated with the failure threshold, wherein the capabilities include at least one of:
power requirements of the UE;
power levels of the UE; or
radio conditions at the UE; and

determine the failure threshold based, at least in part, on the capabilities.

Assignees

• Apple Inc

Inventors

• Saad Muhammad
• Rahim Syed A
• Garg Sharad
• Venkataraman Vijay
• Tang Jia
• Lou Wenping
• Elangovan Thanigaivelu
• Zhao Pengkai
• Dhanani Tarakkumar G

Classifications

• H04W74/0833

  Random access procedures, e.g. with 4-step access · CPC title

• H04W36/00833

  Handover statistics · CPC title

• H04W36/00698

  using different RATs · CPC title

• H04W36/0079 Primary

  in case of hand-off failure or rejection · CPC title

• H04W24/04

  Arrangements for maintaining operational condition · CPC title