WO-2026090830-A1 - TECHNIQUES FOR UPLINK BEAM MANAGEMENT

WO2026090830A1WO 2026090830 A1WO2026090830 A1WO 2026090830A1WO-2026090830-A1

Abstract

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may monitor one or more downlink reference signals during a plurality of defined monitoring occasions. The UE may transmit an uplink beam prediction report indicating a predicted uplink failure event associated with one or more uplink beams, wherein the predicted uplink failure event is in accordance with one or more of: a quantity of consecutive uplink out-of-sync indications associated with the one or more downlink reference signals satisfying a first threshold, a quantity of consecutive uplink in-sync indications associated with the one or more downlink reference signals satisfying a second threshold, or one or more uplink beam prediction input metrics.

Inventors

YUAN, FANG
ZHOU, YAN
LUO, TAO

Assignees

QUALCOMM INCORPORATED

Dates

Publication Date: 20260507
Application Date: 20241029

Claims (20)

A user equipment (UE) , comprising: one or more memories storing processor-executable code; and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the UE to: monitor one or more downlink reference signals during a plurality of defined monitoring occasions; and transmit an uplink beam prediction report indicating a predicted uplink failure event associated with one or more uplink beams, wherein the predicted uplink failure event is in accordance with one or more of: a first quantity of consecutive uplink out-of-sync (OOS) indications associated with the one or more downlink reference signals satisfying a first threshold, a second quantity of consecutive uplink in-sync (IS) indications associated with the one or more downlink reference signals satisfying a second threshold, or one or more uplink beam prediction input metrics.
The UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: initiate a timer based at least in part on the first quantity of consecutive uplink OOS indications being greater than or equal to the first threshold, wherein the predicted uplink failure event is based at least in part on the second quantity of consecutive uplink IS indications being less than the second threshold after expiration of the timer.
The UE of claim 2, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: detect, based on a first set of uplink metrics corresponding to a first set of downlink reference signals of the one or more downlink reference signals, the first quantity of consecutive uplink OOS indications; and detect, after initiating the timer and based on a second set of uplink metrics corresponding to a second set of downlink reference signals of the one or more downlink reference signals, the second quantity of consecutive uplink IS indications.
The UE of claim 3, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: obtain, based at least in part on a measurement associated with the first set of downlink reference signals, the first set of uplink metrics; and obtain, during a duration of the timer and based at least in part on a measurement associated with the second set of downlink reference signals, the second set of uplink metrics.
The UE of claim 4, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: obtain, based at least in part on the first set of uplink metrics and the second set of uplink metrics, an indication of a likelihood of an uplink failure event, wherein the predicted uplink failure event is based at least in part on the indication of the likelihood of the uplink failure event.
The UE of claim 3, wherein the one or more uplink beams comprise one or more monitored beams of a plurality of candidate uplink beams, and the one or more processors are individually or collectively further operable to execute the code to cause the UE to: obtain, for each of the one or more monitored beams and based at least in part on the one or more uplink beam prediction input metrics, one or more respective predicted uplink metrics, wherein the one or more respective predicted uplink metrics comprise the first set of uplink metrics and the second set of uplink metrics.
The UE of claim 6, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: transmit a message indicating a request for the one or more uplink beam prediction input metrics associated with the one or more uplink beams; and receive, based at least in part on the request, the one or more uplink beam prediction input metrics.
The UE of claim 7, wherein an uplink interference history associated with each of the one or more uplink beams, a transmit power associated with the one or more downlink reference signals, or beam shape information associated with the one or more uplink beams or one or more measured downlink beams.
The UE of claim 2, wherein the one or more uplink beams comprise one or more monitored beams of a plurality of candidate uplink beams, and the one or more processors are individually or collectively further operable to execute the code to cause the UE to: obtain, for each of the one or more monitored beams and based at least in part on the one or more uplink beam prediction input metrics, a predicted quantity of consecutive uplink OOS indications and a predicted quantity of uplink IS indications, wherein the first quantity of consecutive uplink OOS indications comprises the predicted quantity of consecutive uplink OOS indications, and wherein the second quantity of consecutive uplink IS indications comprises the predicted quantity of consecutive uplink IS indications.
The UE of claim 1, wherein the one or more uplink beams comprise one or more monitored beams of a plurality of candidate uplink beams, and the one or more processors are individually or collectively further operable to execute the code to cause the UE to: obtain, for each of the one or more monitored beams and based at least in part on the one or more uplink beam prediction input metrics, an indication of a likelihood of an uplink failure event, wherein the predicted uplink failure event is based at least in part on the indication of the likelihood of the uplink failure event.
The UE of claim 10, wherein the predicted uplink failure event is an uplink beam failure event or an uplink radio link failure event.
The UE of claim 1, wherein the one or more downlink reference signals comprise one or more downlink beam failure detection reference signals, one or more radio link monitoring reference signals, or a combination thereof.
The UE of claim 1, wherein a power backoff history associated with the one or more uplink beams, an MPE sensor input, an uplink panel placement on the UE, an orientation, speed, and location of the UE, a type of uplink traffic, an uplink interference history associated with the one or more uplink beams, a transmit power associated with the one or more downlink reference signals, beam shape information associated with the one or more uplink beams or one or more downlink beams, or a combination thereof.
The UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: obtain configuration information indicating one or more of: for each of a plurality of uplink prediction outputs, a corresponding set of uplink beam prediction input parameters, the one or more downlink reference signals, the plurality of defined monitoring occasions, an uplink beam prediction report triggering event, a duration of a timer, the first threshold, or the second threshold, wherein monitoring the one or more downlink reference signals and transmitting the uplink beam prediction report are based at least in part on the configuration information.
The UE of claim 14, wherein obtaining the configuration information comprises receiving, from a network entity, the configuration information.
The UE of claim 1, wherein the uplink beam prediction report further comprises a report type, a prediction time, a quantity of reported uplink beams per cell, a quantity of reported cells, and a prediction confidence level.
The UE of claim 1, wherein the one or more processors are individually or collectively further operable to execute the code to cause the UE to: perform, based at least in part on the predicted uplink failure event, a cell handover procedure.
A network entity, comprising: one or more memories storing processor-executable code; and one or more processors coupled with the one or more memories and individually or collectively operable to execute the code to cause the network entity to: transmit, during a plurality of defined monitoring occasions, one or more downlink reference signals; and receive an uplink beam prediction report indicating a predicted uplink failure event associated with one or more uplink beams, wherein the predicted uplink failure event is in accordance with one or more of: a first quantity of consecutive uplink out-of-sync (OOS) indications associated with the one or more downlink reference signals satisfying a first threshold, a second quantity of consecutive uplink in-sync (IS) indications associated with the one or more downlink reference signals satisfying a second threshold, or one or more uplink beam prediction input metrics.
The network entity of claim 18, wherein the one or more processors are individually or collectively further operable to execute the code to cause the network entity to: receive, from a user equipment (UE) , a message indicating a request for the one or more uplink beam prediction input metrics associated with the one or more uplink beams; and transmit, based at least in part on the request, the one or more uplink beam prediction input metrics.
The network entity of claim 18, wherein the predicted uplink failure event is an uplink beam failure event or an uplink radio link failure event.

Description

TECHNIQUES FOR UPLINK BEAM MANAGEMENT FIELD OF TECHNOLOGY The following relates to wireless communications, including techniques for uplink (UL) beam management. BACKGROUND Wireless communications systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems may be capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power) . Examples of such multiple-access systems include fourth generation (4G) systems such as Long Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may be referred to as New Radio (NR) systems. These systems may employ technologies such as code division multiple access (CDMA) , time division multiple access (TDMA) , frequency division multiple access (FDMA) , orthogonal FDMA (OFDMA) , or discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) . A wireless multiple-access communications system may include one or more base stations, each supporting wireless communication for communication devices, which may be known as user equipment (UE) . SUMMARY The systems, methods, and devices of this disclosure each have several innovative aspects, no single one of which is solely responsible for the desirable attributes disclosed herein. A method for wireless communications by a user equipment (UE) is described. The method may include monitoring one or more downlink reference signals during a set of multiple defined monitoring occasions and transmitting an uplink beam prediction report indicating a predicted uplink failure event associated with one or more uplink beams, where the predicted uplink failure event is in accordance with one or more of: a first quantity of consecutive uplink out-of-sync (OOS) indications associated with the one or more downlink reference signals satisfying a first threshold, a second quantity of consecutive uplink in-sync (IS) indications associated with the one or more downlink reference signals satisfying a second threshold, or one or more uplink beam prediction input metrics. A UE for wireless communications is described. The UE may include one or more memories storing processor executable code, and one or more processors coupled with the one or more memories. The one or more processors may individually or collectively be operable to execute the code to cause the UE to monitor one or more downlink reference signals during a set of multiple defined monitoring occasions and transmit an uplink beam prediction report indicating a predicted uplink failure event associated with one or more uplink beams, where the predicted uplink failure event is in accordance with one or more of: a first quantity of consecutive uplink out-of-sync (OOS) indications associated with the one or more downlink reference signals satisfying a first threshold, a second quantity of consecutive uplink in-sync (IS) indications associated with the one or more downlink reference signals satisfying a second threshold, or one or more uplink beam prediction input metrics. Another UE for wireless communications is described. The UE may include means for monitoring one or more downlink reference signals during a set of multiple defined monitoring occasions and means for transmitting an uplink beam prediction report indicating a predicted uplink failure event associated with one or more uplink beams, where the predicted uplink failure event is in accordance with one or more of: a first quantity of consecutive uplink out-of-sync (OOS) indications associated with the one or more downlink reference signals satisfying a first threshold, a second quantity of consecutive uplink in-sync (IS) indications associated with the one or more downlink reference signals satisfying a second threshold, or one or more uplink beam prediction input metrics. A non-transitory computer-readable medium storing code for wireless communications is described. The code may include instructions executable by one or more processors to monitor one or more downlink reference signals during a set of multiple defined monitoring occasions and transmit an uplink beam prediction report indicating a predicted uplink failure event associated with one or more uplink beams, where the predicted uplink failure event is in accordance with one or more of: a first quantity of consecutive uplink out-of-sync (OOS) indications associated with the one or more downlink reference signals satisfying a first threshold, a second quantity of consecutive uplink in-sync (IS) indications associated with the one or more downlink reference signals satisfying a second threshold, or one or more uplink beam prediction input metrics. Some examples of the method, user equipment (UEs) , and non-transitory computer-readable medium described herein may further include operations, features,