GNSS Coexistence Manager for IoT Interference Mitigation
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Solution Overview
Problem
The integration of satellite positioning system (SPS) receivers with radio access technology (RAT) transceivers in IoT devices faces interference issues, leading to challenges in location determination due to electromagnetic interference from RAT transmissions, which can be costly to resolve with hardware components like filters and diplexers.
Innovation Solution
A controller, or coexistence manager, is configured to prioritize SPS receiver operations over RAT transmitter operations by delaying or reducing the power of RAT signals during SPS signal reception, and selectively powering or blanking the SPS receiver to minimize interference without the need for additional hardware components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hardware components like filters and diplexers are used to resolve interference, then location determination reliability is improved, but device cost increases
Solution Approach 1:
The patent replaces physical hardware components (filters and diplexers) with a software-based coexistence manager that controls the timing and power levels of transmitter operations. This substitution eliminates the need for additional hardware while achieving the same interference mitigation goal, thereby maintaining location determination reliability without increasing device cost
Solution Approach 2:
The coexistence manager dynamically adjusts operational parameters such as transmitter power levels and timing schedules to prevent interference with SPS reception. By changing these parameters based on real-time conditions, the system achieves reliable location determination without requiring expensive hardware filters or diplexers
2Object-affected harmful factors
If RAT transmission power is reduced during SPS signal reception, then interference is reduced, but transmission effectiveness deteriorates
Solution Approach 1:
The coexistence manager implements periodic scheduling where the RAT transmitter operates at full power during designated time slots and reduces or suspends transmission during SPS reception periods. This periodic alternation allows the system to maintain both high transmission effectiveness when needed and low interference during positioning operations
Solution Approach 2:
The system dynamically adjusts transmitter power levels based on real-time operational needs and SPS reception requirements. The coexistence manager continuously monitors and modifies transmission parameters, allowing the transmitter to operate at high power when interference is not an issue and reduce power when SPS reception is prioritized
3Adaptability or versatility
If SPS receiver and RAT transmitter operate concurrently, then device functionality is improved, but electromagnetic interference increases
Solution Approach 1:
The coexistence manager acts as an intermediary controller between the SPS receiver and RAT transmitter. It coordinates their operations by scheduling transmission time slots and power levels, enabling both components to function concurrently without causing harmful electromagnetic interference to each other
Data Source
AI summary
Methods, systems, computer-readable media, and apparatuses for to managing use of a satellite positions system (SPS) receiver in conjunction with one or more radio access technology (RAT) transmitters. In certain embodiments, a controller can be used to prioritize reception by the SPS receiver over transmission by the one or more RAT transmitters.