Wireless Coexistence via Transceiver Chain Emphasis
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Solution Overview
Problem
Existing solutions for managing radio frequency interference between multiple wireless protocols in devices, such as Wi-Fi and Bluetooth, are limited by time division coexistence methods, which restrict data rates and user experience due to prioritization of one protocol over the other, especially in devices with close proximity and shared frequency ranges.
Innovation Solution
A method and apparatus that calibrate and configure wireless interfaces to minimize interference by transmitting test patterns, measuring interference, and adjusting parameters such as transmit power and antenna gain to optimize simultaneous operation without requiring time division coexistence, allowing for dynamic mitigation of RF interference between co-located wireless interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If time division coexistence methods are used to manage RF interference between Wi-Fi and Bluetooth, then interference between protocols is reduced, but data rates and user experience deteriorate due to prioritization of one protocol over the other
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmit power levels and antenna gain settings for different wireless protocols based on real-time interference measurements. Instead of using time division to separate protocols, the system modifies operational parameters (power, gain) to allow simultaneous operation while managing interference, thereby maintaining high data rates for both Wi-Fi and Bluetooth concurrently
Solution Approach 2:
The system implements dynamics by continuously monitoring interference levels between co-located wireless interfaces and dynamically adjusting transmission parameters in real-time. This dynamic adaptation allows the system to optimize performance for both protocols simultaneously rather than statically prioritizing one protocol through time division, enabling flexible resource allocation that maintains high productivity for multiple protocols
2Adaptability or versatility
If multiple wireless protocols operate simultaneously in close proximity with shared frequency ranges, then device functionality and versatility are improved, but RF interference and signal quality deteriorate
Solution Approach 1:
The patent implements feedback mechanisms where the system continuously measures interference levels between co-located wireless interfaces and uses this feedback to adjust transmission parameters. The receiver measures interference from other protocols and feeds this information back to the transmitter, which then adjusts power levels and antenna gain to minimize interference, enabling multiple protocols to operate simultaneously with maintained signal quality
Solution Approach 2:
The system changes operational parameters dynamically based on interference conditions. When multiple protocols operate in close proximity, the system adjusts transmit power, antenna gain, and other transmission parameters to optimize coexistence, allowing the device to maintain versatile functionality across multiple protocols while managing RF interference through parameter optimization
3Reliability
If transmit power and antenna gain are increased to improve signal strength, then communication reliability is improved, but interference with other wireless interfaces increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting transmit power and antenna gain based on real-time interference measurements. The system identifies the optimal parameter combination that achieves sufficient communication reliability while minimizing interference to other wireless interfaces, rather than using fixed high power settings that would cause excessive interference
Solution Approach 2:
The system applies local quality by optimizing transmission parameters for each specific wireless interface and protocol based on its operational context and interference environment. Each interface can have customized power and gain settings tailored to its specific communication requirements and interference profile, allowing reliable operation without uniformly increasing interference across all interfaces
Data Source
AI summary
Methods and apparatus for reduction of interference between a plurality of wireless interfaces. In one exemplary embodiment, a device having a first (e.g., Wi-Fi) interface and a second (e.g., Bluetooth) interface monitors interference between its interfaces. A reduction in transmit power of the Wi-Fi module causes a disproportionately larger reduction in undesirable interference experienced at the Bluetooth antennas. For example, when the Bluetooth interface detects interference levels above acceptable thresholds, the Wi-Fi interface adjusts operation of one or more of its transmit chains based on various conditions such as duty cycle, Received Signal Strength Indication (RSSI), etc. Various embodiments of the present invention provide simultaneous operation of WLAN and PAN interfaces, without requiring time division coexistence, by reducing power on a subset of interfering antennas.