Beam Failure Recovery Power Saving in Mobile Stations

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Solution Overview

Problem

Existing wireless communication systems face inefficiencies in power management during beam failure recovery (BFR) requests, leading to unnecessary consumption of resources when monitoring control channels after a BFR request is transmitted.

Innovation Solution

Mobile stations are configured to detect beam failure and transmit a BFR request, subsequently refraining from monitoring control channels associated with the failure to conserve power.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the mobile station continues to monitor control channels after transmitting a BFR request, then it can receive potential recovery responses, but it consumes unnecessary power due to the beam failure

Engineering Contradiction:

Improvebeam failure recoveryVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent extracts the mobile station from continuous control channel monitoring after BFR request transmission. By removing this monitoring function, the system eliminates unnecessary power consumption while the network node separately handles response transmission, maintaining recovery reliability without the energy waste of futile monitoring.

Inventive Principle:

Principle #2Taking out (Extraction)

2Reliability

If the mobile station monitors control channels after BFR request, then it can detect recovery responses, but it wastes time and energy on channels associated with failed beams

Engineering Contradiction:

Improverecovery response detectionVSAvoidenergy waste

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The network node acts as an intermediary that receives BFR requests and transmits responses through alternative beams. This mediator approach allows the mobile station to stop monitoring failed channels while the network ensures response delivery through functional beams, eliminating energy waste without compromising detection reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Use of energy by moving object

If the mobile station refrains from monitoring control channels after BFR request, then power consumption is reduced, but it may miss recovery responses on the failed beam

Engineering Contradiction:

Improvepower consumptionVSAvoidrecovery response

Core Design Contradiction:

Use of energy by moving objectVSLoss of information

Solution Approach 1:

The network node is pre-configured to transmit BFR responses through alternative, functional beams rather than the failed beam. This preliminary arrangement ensures that when the mobile station stops monitoring the failed channel, the response is already routed through a different path, preventing information loss while enabling power savings.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250373314A1Power saving after beam failure recovery request

Publication Date: 2025.12.04 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a mobile station may detect a beam failure associated with a beam used to communicate with a network node. The mobile station may transmit a beam failure recovery (BFR) request to the network node based at least in part on the beam failure. The mobile station may refrain from monitoring one or more control channels associated with the beam failure after transmitting the BFR request. Numerous other aspects are described.