Co-existing Radio Interference Mitigation via Conditional Indication
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Solution Overview
Problem
Current wireless devices with co-existing radios of different radio access technologies face interference issues, where transmissions from one radio can disrupt the reception of another, leading to decreased receiver signal strength and increased interference.
Innovation Solution
A method is implemented where each radio determines if its transmission will cause interference to the other based on specific criteria, and if so, it sends an indication to adjust its transmission accordingly, such as reducing power or ignoring the indication if no interference is expected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmissions are continuously performed by co-existing radios, then communication functionality is maintained, but interference between radios increases and receiver signal strength decreases
Solution Approach 1:
The system performs preliminary determination of interference conditions before transmission occurs. The first RAT radio determines whether its transmission will cause interference to the second RAT radio's reception, and only transmits when necessary based on this advance assessment, thereby preventing harmful interference before it occurs.
Solution Approach 2:
The transmission behavior of the first RAT radio is made dynamic rather than static. The radio continuously monitors interference conditions and adjusts its transmission decisions in real-time based on whether the second RAT radio is currently receiving, allowing the system to adapt transmission patterns to minimize interference while maintaining communication functionality.
2Reliability
If indication transmission is performed for every transmission event, then interference information is communicated, but device complexity and signaling overhead increase
Solution Approach 1:
Instead of transmitting indications for every single transmission event, the system applies partial action by only sending interference indications when actually needed - specifically when the first RAT radio determines that its transmission will cause interference to the second RAT radio's reception. This reduces signaling overhead while maintaining sufficient interference information for reliable operation.
Data Source
AI summary
Methods and systems for addressing interference between co-existing radios of differing radio access technologies (RATs) are provided. One RAT radio send an indication to a second RAT radio when it is transmitting, but does so after determining there is an actual likelihood that the first RAT transmission will interfere with reception by the second RAT radio. Optionally, the second RAT radio makes its own determination of whether there is a likelihood of interference, and ignores the indication if it is determined interference is not likely. Alternatively, the second RAT radio sends an indication to the first RAT radio when it is receiving, only after determining there is a likelihood that first RAT transmissions will interfere with reception by the second RAT radio.