Narrowband Listen-Before-Talk for UWB Synchronization

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently transmitting ultra-wideband (UWB) signals due to interference from narrowband communications, particularly in crowded frequency bands like UNII-3, leading to synchronization issues and increased collision rates.

Innovation Solution

Implementing a listen-before-talk (LBT) procedure for narrowband (NB) communications to provide time and frequency synchronization or scheduling information, allowing successful transmission of UWB signals by selecting appropriate channels and transmission occasions based on duty cycles and prioritization to minimize interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If narrowband communications are transmitted in crowded frequency bands, then communication coverage and connectivity are improved, but interference and collision rates increase

Engineering Contradiction:

Improvecommunication coverageVSAvoidinterference

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The system performs a listen-before-talk (LBT) procedure before transmitting narrowband communications. This preliminary action detects whether the channel is busy or idle, allowing the device to defer transmission when interference is detected, thereby reducing collision rates while maintaining communication coverage in crowded frequency bands

Inventive Principle:

Principle #10Preliminary action

2Productivity

If ultra-wideband signals are transmitted simultaneously with narrowband communications, then data transmission efficiency is improved, but synchronization issues arise

Engineering Contradiction:

Improvedata transmission efficiencyVSAvoidsynchronization

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system segments the communication spectrum into narrowband and ultra-wideband channels, allowing them to operate in parallel without interfering with each other. The LBT procedure specifically manages the narrowband portion, while UWB transmissions can proceed simultaneously on separate frequency resources, maintaining both efficiency and synchronization

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The LBT procedure acts as an intermediary mechanism that coordinates between narrowband and ultra-wideband transmissions. By monitoring narrowband channel occupancy and controlling narrowband transmission timing, it indirectly protects UWB transmissions from synchronization disruptions caused by narrowband interference

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250113381A1Narrowband communication for ultra-wideband communication

Publication Date: 2025.04.03 QUALCOMM INC

AI summary

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless device may perform a listen-before-talk (LBT) procedure for a narrowband communication that provides time and frequency synchronization and/or scheduling information for an ultra-wideband (UWB) communication. The wireless device may transmit the narrowband communication in response to the LBT procedure being successful. The wireless device may transmit the UWB communication based at least in part on the time and frequency synchronization and/or scheduling information. Numerous other aspects are described.