Wired Bus Transceiver Power Balancing for Signal Range Control
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Solution Overview
Problem
Modern vehicle bus systems experience significant variations in received signal strengths due to line loss, leading to inefficiencies in signal processing and potential overloading of transceivers.
Innovation Solution
The transmit signal strengths of transceivers are individually adjusted to minimize the ratio between maximum and minimum received signal strengths, allowing for optimized dynamic range utilization and simultaneous communication across multiple frequency bands using OFDMA.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If transceivers use equal transmit signal strengths, then the system is simple to operate, but the ratio between maximum and minimum received signal strengths increases due to line loss variations
Solution Approach 1:
The patent applies local quality by assigning different transmit signal strengths to different transceivers based on their specific positions and line loss characteristics. Each transceiver is configured with a customized transmit power level that compensates for its unique communication path conditions, rather than using a uniform transmit strength for all devices.
Solution Approach 2:
The patent changes the transmit signal strength parameter individually for each transceiver based on determined line loss values. By adjusting this critical parameter according to measured or estimated transmission path characteristics, the system optimizes received signal strengths across all transceivers connected to the bus.
2Reliability
If transmit signal strengths are individually adjusted to reduce signal strength ratio, then signal processing efficiency improves, but device complexity increases
Solution Approach 1:
The patent implements self-service by enabling transceivers to autonomously determine their own transmit signal strengths based on locally measured or estimated line loss values. Each transceiver independently configures its transmit power without requiring centralized control, reducing system complexity while maintaining optimization.
Solution Approach 2:
The system employs feedback mechanisms where transceivers monitor received signal strengths and adjust their transmit power accordingly. This closed-loop approach allows continuous optimization of signal levels based on actual communication conditions, balancing complexity with performance improvement.
3Productivity
If multiple transceivers transmit simultaneously on multiple frequency bands, then communication productivity increases, but the risk of transceiver overloading increases
Solution Approach 1:
The patent segments the communication system into multiple orthogonal frequency subbands, allowing multiple transceivers to transmit simultaneously on different frequency bands without interference. This frequency division multiplexing enables parallel communications while managing transceiver load through structured frequency allocation.
Solution Approach 2:
The system dynamically adjusts transmit signal strengths and received gain settings based on real-time communication conditions and the number of active frequency bands. This dynamic adaptation prevents transceiver overload by adjusting parameters according to actual system state rather than using fixed configurations.
Data Source
AI summary
A wired communication system includes a plurality of transceivers that are interconnected via a wired communication bus. A transmit signal strength of the respective transceivers is individually set such that, on the respective transceivers, a ratio between a maximum received signal strength and a minimum received signal strength of transmit signals of other transceivers is reduced compared to other transmit signal strength configurations of the respective transceivers.