Techniques for cell bar time selection

Patent metadata

Field	Value
Publication number	US-2023224789-A1
Application number	US-202118003912-A
Country	US
Kind code	A1
Filing date	Apr 27, 2021
Priority date	Sep 3, 2020
Publication date	Jul 13, 2023
Grant date	—

Abstract

Methods, systems, and devices for are described. A user equipment (UE) may be configured to initiate a first setup procedure with a first cell supported by a base station. The UE may determine a system information block (SIB) read failure, a radio link failure, or both, based on initiating the first setup procedure. The UE may determine whether a link quality metric associated with communications between the UE and the first cell satisfies a link quality threshold. The UE may select a cell bar time based on a type of a communications service established via the base station, whether the link quality metric satisfies the link quality threshold, or both. The UE may then initiate a cell reselection procedure based on the cell bar time.

First claim

What is claimed is:

1 . A method for wireless communication at a user equipment (UE), comprising:
initiating a first setup procedure with a first cell supported by a base station; determining a system information block read failure, a radio link failure, or both, based at least in part on initiating the first setup procedure; determining whether a link quality metric associated with communications between the UE and the first cell satisfies a link quality threshold; selecting a cell bar time based at least in part on a type of a communications service established via the base station, whether the link quality metric satisfies the link quality threshold, or both; and initiating a cell reselection procedure based at least in part on the cell bar time.

2 . The method of claim 1 , wherein initiating the cell reselection procedure based at least in part on the cell bar time comprises:
adding the first cell to a list of barred cells based at least in part on selecting the cell bar time; and scanning for cells different from the first cell based at least in part on adding the first cell to the list of barred cells.

3 . The method of claim 2 , further comprising:
determining an expiration of the cell bar time; removing the first cell from the list of barred cells based at least in part on determining the expiration of the cell bar time; and initiating a second setup procedure with the first cell based at least in part on removing the first cell from the list of barred cells.

4 . The method of claim 1 , further comprising:
determining whether the type of the communications service is one of a set of predefined performance-critical communications services.

5 . The method of claim 4 , wherein selecting the cell bar time is based at least in part on determining that the type of the communications service is one of the set of predefined performance-critical communications services.

6 . The method of claim 5 , wherein the set of predefined performance-critical communications services comprises a voice over Long Term Evolution (VoLTE) call, a voice over New Radio (VoNR) call, a gaming communications service, or any combination thereof.

7 . The method of claim 5 , wherein the type of the communications service is not one of the set of predefined performance-critical communications services, the method further comprising:
selecting a second cell bar time different from the cell bar time if the link quality metric fails to satisfy the link quality threshold; and selecting the cell bar time if the link quality metric satisfies the link quality threshold.

8 . The method of claim 7 , wherein the cell bar time is shorter than the second cell bar time.

9 . The method of claim 1 , further comprising:
determining a set of cell bar times; determining that the link quality metric satisfies the link quality threshold; determining that the link quality metric fails to satisfy a second link quality threshold different from the link quality threshold; and selecting the cell bar time from the set of cell bar times based at least in part on determining the link quality metric satisfies the link quality threshold and fails to satisfy the second link quality threshold.

10 . The method of claim 1 , further comprising:
determining a reference signal received power (RSRP) metric associated with the first cell, a reference signal received quality (RSRQ) metric associated with the first cell, a signal-to-noise ratio (SNR) metric associated with the first cell, a signal-to-interference-plus-noise ratio (SINR) metric associated with the first cell, or any combination thereof, wherein the link quality metric comprises the RSRP metric, the RSRQ metric, the SNR metric, the SINK metric, or any combination thereof.

11 . The method of claim 1 , further comprising:
determining a type of bearer associated with the communications service, a latency metric associated with the communications service, a quality of service metric associated with the communications service, a reliability metric associated with the communications service, or any combination thereof, wherein determining the type of the communications service is based at least in part on the determined type of bearer, the determined latency metric, the determined quality of service metric, the determined reliability metric, or any combination thereof.

12 . The method of claim 1 , further comprising:
receiving, from a higher layer of the UE, an indication of the type of the communications service, wherein determining the type of the communications service is based at least in part on receiving the indication from the higher layer of the UE.

13 . The method of claim 1 , further comprising:
establishing the communications service in a connected mode of operation prior to initiating the first setup procedure, wherein determining the system information block read failure, the radio link failure, or both, is based at least in part on establishing the communications service in the connected mode of operation.

14 . An apparatus for wireless communication at a user equipment (UE), comprising:
a processor; memory coupled with the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to:
initiate a first setup procedure with a first cell supported by a base station;
determine a system information block read failure, a radio link failure, or both, based at least in part on initiating the first setup procedure;
determine whether a link quality metric associated with communications between the UE and the first cell satisfies a link quality threshold;
select a cell bar time based at least in part on a type of a communications service established via the base station, whether the link quality metric satisfies the link quality threshold, or both; and
initiate a cell reselection procedure based at least in part on the cell bar time.

15 . The apparatus of claim 14 , wherein the instructions to initiate the cell reselection procedure based at least in part on the cell bar time are executable by the processor to cause the apparatus to:
add the first cell to a list of barred cells based at least in part on selecting the cell bar time; and scanning for cells different from the first cell based at least in part on adding the first cell to the list of barred cells.

16 . The apparatus of claim 15 , wherein the instructions are further executable by the processor to cause the apparatus to:
determine an expiration of the cell bar time; remove the first cell from the list of barred cells based at least in part on determining the expiration of the cell bar time; and initiate a second setup procedure with the first cell based at least in part on removing the first cell from the list of barred cells.

17 . The apparatus of claim 14 , wherein the instructions are further executable by the processor to cause the apparatus to:
determine whether the type of the communications service is one of a set of predefined performance-critical communications services.

18 . The apparatus of claim 17 , wherein selecting the cell bar time is based at least in part on determining that the type of the communications service is one of the set of predefined performance-critical communications services.

19 . The apparatus of claim 18 , wherein the set of predefined performance-critical communications services comprises a voice over Long Term Evolution (VoLTE) call, a voice over New Radio (VoNR) call, a gaming communications service, or any

Assignees

• Qualcomm Inc

Inventors

• Vyas Uttam
• Kannan Balaji
• Murugan Muralidharan
• Pant Nitin

Classifications

• H04W48/16 Primary

  Discovering, processing access restriction or access information · CPC title

• H04W36/305 Primary

  Handover due to radio link failure (control signalling for hand-off failure H04W36/0079) · CPC title

• H04W36/00835

  Determination of neighbour cell lists · CPC title

• H04W36/08

  Reselecting an access point · CPC title