GNSS Coexistence via RAT Priority Control

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Solution Overview

Problem

The coexistence of global navigation satellite system (GNSS) receivers with radio access technology (RAT) transceivers is hindered by interference, where RAT transceivers' wireless signal transmissions degrade the GNSS receivers' ability to process signals, leading to significant periods of impaired location determination.

Innovation Solution

A method and apparatus that manage the coexistence by obtaining parameters associated with RAT transceivers, determining if they impact the GNSS receiver's operation, and instructing the transceivers to switch to alternative RATs or adjust parameters to mitigate interference, such as offloading data transmission or changing operating modes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If RAT transceiver transmits wireless signals continuously, then data communication productivity is improved, but GNSS receiver signal processing reliability deteriorates due to interference

Engineering Contradiction:

Improvedata communication productivityVSAvoidGNSS receiver signal processing reliability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system performs preliminary actions by scheduling RAT transmissions to occur during GNSS signal processing periods, proactively planning transmission timing to avoid interference before it occurs. The coexistence manager schedules RAT transmissions in time windows that do not overlap with GNSS processing intervals, preventing interference rather than reacting to it.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system dynamically adjusts RAT transmission parameters including timing, frequency, and power levels based on real-time GNSS signal processing requirements. The coexistence manager continuously monitors GNSS processing schedules and adapts RAT transmission characteristics to minimize interference while maintaining communication productivity.

Inventive Principle:

Principle #15Dynamics

2Power

If RAT transceiver transmission power is increased, then communication range and quality are improved, but interference to GNSS receiver increases

Engineering Contradiction:

Improvetransmission powerVSAvoidinterference to GNSS receiver

Core Design Contradiction:

PowerVSObject-affected harmful factors

Solution Approach 1:

The system changes transmission parameters by adjusting RAT transmission power levels, frequency bands, and timing characteristics based on GNSS processing requirements. The coexistence manager modifies these parameters dynamically to reduce harmful interference while maintaining adequate communication quality.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The coexistence manager acts as an intermediary between the RAT transceiver and GNSS receiver, mediating their interaction by controlling when and how RAT transmissions occur. It schedules transmissions to avoid GNSS processing periods and adjusts parameters to minimize interference impact.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If multiple RAT transceivers operate simultaneously, then wireless communication versatility is improved, but interference to GNSS receiver is exacerbated

Engineering Contradiction:

Improvewireless communication versatilityVSAvoidinterference to GNSS receiver

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The system segments the operation of multiple RAT transceivers by dividing time into distinct windows for different transceivers. The coexistence manager schedules each RAT transceiver to operate in specific time slots that do not overlap with GNSS processing or with each other, allowing multiple transceivers to coexist without excessive interference.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system implements periodic action by scheduling RAT transmissions in periodic time windows that are coordinated with GNSS processing cycles. Transmissions occur in structured intervals rather than continuously, allowing GNSS receiver periodic access to process signals without interference from multiple RAT transceivers.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS9749925B2Systems and methods for GNSS rat priority control for coexistence of a GNSS receiver and one or more rat transceivers

Publication Date: 2017.08.29 QUALCOMM INC

AI summary

Various arrangements are presented for managing co-existence of a global navigation satellite system (GNSS) receiver with one or more transceivers. A coexistence manager may obtain one or more parameters associated with a first transceiver of the one or more transceivers operating in accordance with a first radio access technology (RAT) and corresponding to an operating event. The first transceiver may be capable of operating in accordance with one or more RATs. The coexistence manager may further determine that the one or more parameters impacts an operation of the GNSS receiver and exceeds a predefined threshold and instruct the first transceiver to perform at least one of selecting a second RAT, changing the one or more parameters or any combination thereof to transmit at least a first portion of a data corresponding to the operating event based on the determination that the one or more parameters impacts the operation of the GNSS receiver.