Bluetooth Low Energy Data Prioritization for Latency Reduction
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Solution Overview
Problem
The Bluetooth Low Energy standard is not suitable for reliable and timely transfer of time-critical data due to its event-based nature and long latency periods, which poses safety risks in applications like remote-controlled vehicle parking.
Innovation Solution
A method that prioritizes data packets using applications to control the transfer process, allowing high-priority data to be sent with shorter latency, and dynamically adjusts data throughput based on current conditions, ensuring that time-critical data is transferred promptly while low-priority data can wait or be omitted if necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If data packets are transferred using Bluetooth Low Energy standard, then energy consumption is reduced and wireless connection is established, but latency period increases and time-critical data cannot be transferred reliably
Solution Approach 1:
The patent segments data packets into different priority classes (high-priority and low-priority packets). High-priority packets are transferred during dedicated time slots within the connection event, while low-priority packets are transferred in subsequent time slots. This segmentation allows time-critical data to be transmitted with minimal latency while maintaining the energy-efficient BLE connection structure.
Solution Approach 2:
The patent dynamically adjusts the transfer timing and priority assignment based on the type of data being transmitted. The control unit determines packet priority and transfer timing dynamically during the connection event, allowing the system to adapt to varying data criticality and optimize latency for time-sensitive data while maintaining overall energy efficiency.
2Productivity
If multiple data packets are transferred within a connection event, then data throughput increases, but transfer control complexity increases
Solution Approach 1:
The patent divides the data packets into multiple priority classes and assigns different time slots for transferring each class within the connection event. The control unit manages this segmented transfer process, determining which packets to transmit in which time slots based on priority rules, thereby increasing data throughput while keeping control manageable through structured organization.
Solution Approach 2:
The patent implements a feedback mechanism where the control unit receives information about transmitted packets and adjusts subsequent transfer decisions accordingly. This feedback loop allows the system to optimize packet selection and timing based on actual transfer conditions, managing complexity through adaptive control rather than rigid predetermined sequences.
Data Source
AI summary
The present disclosure relates to a method for transferring data, in which a peripheral device and a central device are wirelessly connected in accordance with the Bluetooth Low Energy (BLE) standard and a data packet is transferred within a transfer window of a Bluetooth Low Energy data channel between the peripheral device and the central device.