Bluetooth Transceiver Parameter Adjustment for Wi-Fi Coexistence

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Solution Overview

Problem

Bluetooth (BT) and Wi-Fi transceivers using the same frequency band experience interference, leading to increased transmission error rates and reduced throughput, as existing mitigation methods only allow one transceiver to transmit/receive at a time and do not adequately consider the degree of interference between the two.

Innovation Solution

A wireless communication device with a BT controller that adjusts BT transceiver parameters based on the central frequency difference between a wireless channel and a BT channel, using different sets of parameters for different frequency intervals to minimize interference and optimize communication success rates.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the BT transceiver and Wi-Fi transceiver use the same frequency band simultaneously, then the throughput of both transceivers is improved, but the transmission error rate increases due to interference

Engineering Contradiction:

ImprovethroughputVSAvoidtransmission error rate

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent applies parameter changes by dynamically adjusting the BT transceiver's transmission signal strength and reception sensitivity based on the detected Wi-Fi transceiver operation state. When Wi-Fi is transmitting, BT transmission power is reduced; when Wi-Fi is receiving, BT reception sensitivity is adjusted. This dynamic parameter adjustment allows both transceivers to operate simultaneously in the same frequency band while mitigating interference effects.

Inventive Principle:

Principle #35Parameter changes

2Object-affected harmful factors

If the BT transceiver reduces transmission signal strength to lower influence on Wi-Fi receiver, then the interference to Wi-Fi is reduced, but the reception failure rate of far-end BT device increases

Engineering Contradiction:

Improveinterference to Wi-Fi receiverVSAvoidreception failure rate of BT device

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent implements dynamics by making the BT transceiver's parameters dynamic rather than static. The transmission signal strength and reception sensitivity are continuously adjusted based on the real-time operation state of the Wi-Fi transceiver. This dynamic approach allows the system to optimize BT communication parameters adaptively, preventing reception failures that would occur with constant parameter reduction.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes parameters by adjusting both transmission signal strength and reception sensitivity of the BT transceiver based on Wi-Fi operation states. Instead of merely reducing transmission power, the system also modifies reception sensitivity to compensate, thereby maintaining BT communication reliability while reducing interference to Wi-Fi.

Inventive Principle:

Principle #35Parameter changes

3Object-affected harmful factors

If the BT transceiver reduces reception sensitivity to prevent excessive amplification of interference, then the interference impact is reduced, but the degradation of reception sensitivity occurs

Engineering Contradiction:

Improveexcessive amplification of interferenceVSAvoidreception sensitivity of BT transceiver

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent applies dynamics by making the reception sensitivity of the BT transceiver dynamic rather than constantly reduced. The reception sensitivity is adjusted based on the Wi-Fi transceiver's operation state - it is temporarily reduced only when Wi-Fi is transmitting to prevent excessive amplification of interference, and restored when Wi-Fi is not transmitting to maintain normal BT reception performance.

Inventive Principle:

Principle #15Dynamics

4Reliability

If only one transceiver transmits/receives at a time through the same frequency band, then the interference between transceivers is avoided, but the throughput of both transceivers decreases

Engineering Contradiction:

Improveinterference avoidanceVSAvoidthroughput

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies parameter changes by dynamically adjusting BT transmission signal strength and reception sensitivity based on Wi-Fi operation states, enabling both transceivers to operate simultaneously in the same frequency band. This eliminates the need for time-division multiplexing, allowing continuous transmission and reception operations for both systems, thereby maximizing throughput while managing interference through parameter adaptation.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS11510151B2Multi-transceiver wireless communication device capable of adequately adjusting parameters for Bluetooth transceiver

Publication Date: 2022.11.22 REALTEK SEMICON CORP

AI summary

Disclosed is a wireless communication device including a wireless transceiver, a Bluetooth (BT) transceiver and a BT controller. The wireless transceiver supports at least one wireless communication standard (e.g., at least one of a series of IEEE 802.11 standards) and executes wireless communication via a wireless channel in a period of time. The BT transceiver executes BT communication via a plurality of BT channels successively in the period of time. The BT controller determines that a central-frequency difference between the wireless channel and a BT channel falls within a frequency interval of N predetermined frequency intervals and thereby controls the BT transceiver to use a set of parameters related to the frequency interval, wherein the set of parameters is one of N predetermined sets of parameters.