Adaptive Wireless Lighting Device Signal Interleaving
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Solution Overview
Problem
Lighting devices with wireless connectivity face conflicts in providing multiple functions simultaneously, such as indoor positioning and status information, due to the need for continuous beaconing of identifiers, which interferes with other wireless communication modalities.
Innovation Solution
A lighting device with a transmitter and controller that interleaves two wireless messages with adaptive durations, allowing prioritization of functions based on specific periods, enabling simultaneous transmission of multiple functions by adjusting the duration of each message.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If continuous beaconing of identifiers is implemented for indoor positioning, then positioning accuracy is improved, but wireless communication for other functions (e.g., status information transmission) deteriorates
Solution Approach 1:
The wireless message transmission is segmented into multiple types (first wireless message for positioning identifiers, second wireless message for status information). The controller selectively transmits different message types based on operational conditions, allowing the system to divide communication tasks into distinct segments that can be optimized independently for each function.
Solution Approach 2:
The message duration parameter is made dynamic and adaptive. The controller adjusts the duration of wireless messages based on the operational state of the lighting device. When status information needs to be transmitted, the duration is extended; when positioning is the priority, the duration is reduced. This dynamic adaptation allows the system to optimize performance for different functions at different times.
2Adaptability or versatility
If multiple functions are provided simultaneously via the same wireless connection, then device versatility is improved, but signal transmission conflicts worsen
Solution Approach 1:
The system implements periodic transmission of different wireless message types in an alternating sequence. The controller periodically switches between transmitting positioning identifiers and status information, creating a rhythmic pattern of communication. This periodic action ensures that each function receives dedicated transmission time, reducing signal conflicts while maintaining both functionalities.
Solution Approach 2:
The controller changes transmission parameters (message type, duration, timing) based on operational conditions. By dynamically adjusting these parameters, the system can prioritize positioning accuracy when needed while also transmitting status information during other periods. This parameter adaptation resolves the conflict between multiple functions by allowing flexible resource allocation.
3Productivity
If adaptive message duration is implemented, then transmission efficiency is improved, but system complexity worsens
Solution Approach 1:
The controller autonomously determines when to transmit different types of wireless messages based on its internal state and operational conditions. The lighting device itself monitors its own status (positioning mode, status information availability) and automatically adjusts transmission behavior without external intervention. This self-service approach simplifies the overall system architecture while maintaining adaptive efficiency.
Data Source
AI summary
The invention provides a lighting device comprising a transmitter, a controller and a sensor; wherein the controller is configured to control the transmitter to repeatedly transmit a second wireless message interleaved with a first wireless message, wherein the first wireless message has a first duration and comprises a first signal, wherein the second wireless message has a second duration and comprises a second signal; wherein the first duration and/or the second duration is adaptive during a lifetime of the lighting device; wherein the controller is configured to receive a measurement from the sensor and control the transmitter to transmit the second wireless message comprising the second signal comprising the measurement.