Integrated Wake-Up Signaling for Bandwidth Part Switching

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing bandwidth part (BWP) switching and wake-up mechanisms, particularly in New Radio (NR) networks, which impact spectral efficiency and power consumption.

Innovation Solution

Implementing an integrated wake-up signal and BWP switch sequence to facilitate efficient BWP switching by selecting and transmitting a specific sequence to a mobile station, allowing it to wake up and switch to a designated BWP.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate wake-up signal and BWP switching mechanisms are used, then device compatibility and reliability are improved, but spectral efficiency deteriorates and power consumption increases

Engineering Contradiction:

Improvedevice compatibilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent combines the wake-up signal and BWP switching indication into a single integrated sequence transmitted on the Physical Sidelink Feedback Channel (PSFCH). This merging eliminates the need for separate wake-up signals and BWP switching messages, thereby improving spectral efficiency and reducing power consumption while maintaining reliable communication through the established PSFCH framework

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If separate wake-up signal and BWP switching mechanisms are used, then device compatibility is improved, but spectral efficiency deteriorates

Engineering Contradiction:

Improvedevice compatibilityVSAvoidspectral efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent merges multiple functions (wake-up signaling and BWP switching) into a single integrated sequence transmitted on the PSFCH channel. This consolidation reduces the number of separate transmissions required, thereby improving spectral efficiency by utilizing existing channel resources more effectively while maintaining device compatibility

Inventive Principle:

Principle #5Merging (Combining)

3Productivity

If integrated wake-up signal and BWP switch sequence is used, then spectral efficiency is improved, but device complexity increases

Engineering Contradiction:

Improvespectral efficiencyVSAvoidsequence processing complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The integrated sequence is designed to be self-contained, carrying both wake-up indication and BWP switching information in a single transmission. The receiving device can autonomously decode the sequence to extract both pieces of information without requiring additional signaling or complex coordination protocols, thereby managing complexity through self-service design

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12574194B2Bandwidth part switch with wake up signal

Publication Date: 2026.03.10 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first mobile station may select a sequence that is to be used by a second mobile station to wake up and switch to a bandwidth part indicated by the sequence. The first mobile station may transmit the sequence to the second mobile station. Numerous other aspects are described.