UE Cell Wake-Up Signal Requesting SSB Transmission

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing power consumption in network nodes, particularly when there are no connected UEs or light traffic loads, leading to unnecessary power consumption during periodic transmissions and monitoring.

Innovation Solution

The implementation of a method where a UE transmits a cell wake-up signal (WUS) to request a synchronization signal block (SSB), with the SSB being received via a resource offset from a reference resource, allowing for reduced latency and overhead in synchronization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the network node performs periodic transmissions and monitoring to maintain synchronization, then the synchronization reliability is improved, but the power consumption increases

Engineering Contradiction:

Improvesynchronization reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The network node performs periodic monitoring of wake-up signals during active periods and enters sleep mode during inactive periods. This periodic operation pattern allows the system to maintain synchronization capability while significantly reducing power consumption during low-traffic periods.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The UE autonomously determines when to send wake-up signals based on its own synchronization needs, eliminating the need for the network node to continuously monitor and manage synchronization for each UE. This self-service approach reduces the network node's monitoring burden and power consumption.

Inventive Principle:

Principle #25Self-service

2Loss of time

If the network node continuously monitors for wake-up signals, then the response latency is reduced, but the power consumption increases

Engineering Contradiction:

Improveresponse latencyVSAvoidpower consumption

Core Design Contradiction:

Loss of timeVSUse of energy by moving object

Solution Approach 1:

The network node monitors wake-up signals periodically at predetermined intervals rather than continuously. This periodic monitoring approach maintains acceptable response latency while dramatically reducing power consumption during idle periods when no UEs require synchronization.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The system pre-configures monitoring intervals and wake-up signal resources before actual synchronization events occur. This preliminary configuration allows the network node to enter low-power states while still being able to quickly respond when UEs need synchronization services.

Inventive Principle:

Principle #10Preliminary action

3Ease of operation

If the SSB is transmitted at fixed periodic intervals, then the synchronization process is simplified, but the resource allocation efficiency decreases

Engineering Contradiction:

Improvesynchronization process simplicityVSAvoidresource allocation efficiency

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The SSB transmission timing is made dynamic rather than fixed. The network node transmits SSBs in response to UE wake-up signals, allowing the system to adapt transmission resources to actual demand. This dynamic approach improves resource allocation efficiency while maintaining operational simplicity through standardized procedures.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the timing parameter of SSB transmissions from fixed periodic intervals to event-triggered intervals based on UE requests. This parameter change allows the network to maintain simple synchronization procedures while significantly improving resource utilization by transmitting SSBs only when needed.

Inventive Principle:

Principle #35Parameter changes

4Reliability

If the network node transmits SSBs during low traffic loads, then the synchronization service is maintained, but the unnecessary power consumption increases

Engineering Contradiction:

Improvesynchronization service availabilityVSAvoidunnecessary power consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

UEs autonomously initiate synchronization requests by sending wake-up signals only when they need SSB transmission. This self-service mechanism ensures synchronization service availability on-demand while eliminating unnecessary SSB transmissions during low-traffic periods, thereby reducing power consumption.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent extracts the SSB transmission from continuous periodic operation and implements it as an on-demand service triggered by UE requests. This extraction approach maintains synchronization service reliability while eliminating energy waste from transmitting SSBs when no UEs require them.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS20250048266A1Requested synchronization signal blocks

Publication Date: 2025.02.06 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit a cell wake-up signal (WUS) that indicates a request for a synchronization signal block (SSB). The UE may receive the SSB via a resource that is based at least in part on an offset from a reference resource. Numerous other aspects are described.