TPMS BLE Transmission Timing to Avoid Signal Clashing
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Solution Overview
Problem
Existing tire pressure monitoring systems (TPMS) using Bluetooth Low Energy (BLE) technology face challenges with signal clashing and bandwidth competition due to multiple components transmitting simultaneously, which can lead to reduced data transfer efficiency and potential information loss.
Innovation Solution
The proposed solution involves adjusting the transmission timings of TPM sensors based on various factors such as competition with other onboard BLE systems, clock drift, and Over the Air (OTA) updates, to minimize interference and optimize bandwidth usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple BLE components operate simultaneously in the vehicle, then bidirectional communication capability is improved, but available bandwidth is reduced and signal clashing occurs
Solution Approach 1:
The patent segments the communication bandwidth by assigning different transmission time slots to different BLE components. The TPM system uses specific time slots (e.g., when the vehicle is stationary) while other systems use different slots (e.g., when the vehicle is moving), thereby dividing the shared communication resource to prevent signal clashing and ensure sufficient bandwidth for each component.
2Ease of operation
If TPM sensors transmit data at fixed intervals, then data transmission simplicity is improved, but signal clashing with other BLE systems and clock drift issues worsen
Solution Approach 1:
The patent implements dynamic transmission timing adjustment where the TPM system adapts its transmission schedule based on vehicle state and detected signal interference. The system transitions from fixed-interval transmission to variable timing, delaying transmissions when signal clashing is detected or when the vehicle is moving, thereby maintaining reliability while preserving operational simplicity through automated adaptation.
3Extent of automation
If TPM system uses background initialization like other vehicle systems, then system initialization completeness is improved, but bandwidth competition and transmission delays worsen
Solution Approach 1:
The patent applies preliminary action by having the TPM system initialize and prepare its transmission schedule in advance during vehicle startup, but deliberately deferring actual data transmissions until the vehicle enters a stationary state. This allows the system to be fully initialized and ready (improving automation completeness) while avoiding bandwidth competition with other systems that also initialize in the background, thereby reducing transmission delays.
Data Source
AI summary
A system and method determine and/or adjust tire pressure sensor timings to transmit information using BLE information, regardless of the presence of other BLE systems. A tire pressure monitoring (TPM) system or other computing device receives transmission timing information from tire monitors that transmit using BLE and/or other BLE-enabled components. In response to determining an interference between the transmissions of the tire monitors and/or the components, timing of the transmissions from one or more of the tire monitors is altered to avoid the interference.