Multichannel BLE Receiver for Accurate Tag Location
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing systems for receiving Bluetooth Low Energy (BLE) advertising signals often miss signals due to only listening on single channels, leading to gaps in Received Signal Strength Indicator (RSSI) values and inaccuracies in location determination, especially in challenging radio frequency environments with thousands of tags.
Innovation Solution
Implementing a multichannel receiving unit that simultaneously listens on all three channels (37, 38, and 39) used by BLE tags to advertise their presence, allowing for more accurate distance computation and improved tag discovery by reducing missed signals and enhancing signal strength sampling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single channel is used for receiving BLE advertising signals, then device complexity is reduced, but measurement precision of signal strength and location determination deteriorates
Solution Approach 1:
The receiving unit is segmented into multiple independent channel receivers (first channel receiver, second channel receiver, third channel receiver), each dedicated to receiving advertising signals on a specific BLE advertising channel (channels 37, 38, and 39 respectively). This segmentation allows simultaneous monitoring of all three advertising channels without interference, resolving the contradiction by maintaining low overall device complexity while achieving high measurement precision through parallel channel-specific reception.
2Device complexity
If a single channel is used for receiving BLE advertising signals, then device complexity is reduced, but location determination accuracy deteriorates
Solution Approach 1:
The receiving unit is divided into three separate channel receivers, each dedicated to one of the three BLE advertising channels (37, 38, 39). This segmentation enables simultaneous reception of advertising signals across all channels, providing multiple RSSI measurements for the same tag. The location determination system can then select or combine these measurements to achieve high accuracy without increasing overall device complexity.
Solution Approach 2:
The system implements feedback by continuously monitoring RSSI values across all three advertising channels and using this information to determine tag locations. The processing unit analyzes the feedback from multiple channel receivers to compute accurate distance and location information, resolving the contradiction between simple device architecture and high location determination accuracy.
3Device complexity
If iterative channel scanning is used instead of simultaneous multichannel listening, then device complexity is reduced, but tag discovery speed deteriorates
Solution Approach 1:
The receiving unit is segmented into three parallel channel receivers that simultaneously monitor channels 37, 38, and 39. This segmentation eliminates the need for iterative channel switching, allowing the system to discover tags advertising on any of the three channels instantly. The parallel architecture maintains manageable device complexity while achieving maximum tag discovery speed by capturing all advertising signals concurrently.
Solution Approach 2:
The system implements continuous useful action by maintaining simultaneous reception on all three BLE advertising channels at all times. Unlike iterative scanning that periodically switches between channels, this continuous multichannel reception ensures no advertising signals are missed, maximizing tag discovery speed while keeping the receiving unit design simple and manageable.
4Measurement precision
If multichannel simultaneous reception is implemented, then measurement precision and tag discovery speed improve, but device complexity increases
Solution Approach 1:
The receiving unit is segmented into three specialized channel receivers, each optimized for a specific BLE advertising channel (37, 38, or 39). This segmentation allows the system to achieve high measurement precision on each channel while keeping the overall architecture modular and manageable. Each receiver segment operates independently, simplifying the design compared to a single complex receiver that would need to handle all channels sequentially.
Solution Approach 2:
The receiving unit implements universality by designing each channel receiver to handle the same type of BLE advertising signal processing, but tuned to different channels. This multi-functional design allows the system to receive and process advertising signals on any of the three channels using the same receiver architecture, reducing overall complexity through repetition of proven design patterns rather than creating entirely new processing paths for each channel.
Data Source
AI summary
An example device includes multiple Bluetooth Low Energy (BLE) transceivers, wherein a first BLE transceiver is configured to receive a first BLE advertising signal on a first channel of a BLE frequency band, a second BLE transceiver is configured to receive a second BLE advertising signal on a second channel of the BLE frequency band, and a third BLE transceiver is configured to receive a third BLE advertising signal on a third BLE channel. The first BLE transceiver, the second BLE transceiver, and the third BLE transceiver currently listen for the BLE advertising signals. Processing logic coupled to the BLE transceivers determines data indicative of a distance from the device to a tag that is a source of BLE advertising signals and provides the data to one of a location server or an asset management system.