Direction-Based BLE Discovery Using Geomagnetic Sensors
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Solution Overview
Problem
In wireless communication systems using Bluetooth Low Energy (BLE), devices often discover multiple surrounding devices during the discovery process, leading to unnecessary battery consumption and delays, as they detect devices outside the user's view direction.
Innovation Solution
A method that employs a direction-based discovery mode, utilizing a geomagnetic sensor to determine the user's view direction and exchange direction information with other devices, allowing only devices within the specific view direction to be discovered, thereby reducing unnecessary discovery and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional BLE discovery is performed without direction filtering, then all surrounding devices are discovered, but this causes unnecessary battery consumption and connection delays
Solution Approach 1:
The system performs preliminary action by obtaining direction information from the geomagnetic sensor before executing the device discovery process. This allows the device to pre-determine which directional sector to scan, filtering out devices that are not within the user's view direction before the actual discovery begins, thus avoiding unnecessary battery consumption.
Solution Approach 2:
The invention applies local quality by making the discovery process directional rather than omnidirectional. Instead of uniformly scanning all directions, the system concentrates discovery resources on the specific directional sector where the user is facing, as determined by the geomagnetic sensor data, thereby improving energy efficiency.
2Measurement precision
If conventional BLE discovery is performed without direction filtering, then all surrounding devices are discovered, but this causes delays in establishing connection with the desired device
Solution Approach 1:
The system performs preliminary action by obtaining direction information from the geomagnetic sensor before executing the device discovery process. This allows the device to pre-determine which directional sector to scan, filtering out devices that are not within the user's view direction before the actual discovery begins, thus avoiding unnecessary battery consumption.
Solution Approach 2:
The invention applies skipping by allowing the device to skip over directional sectors that are not relevant to the user's current view. Instead of systematically scanning all 360 degrees, the system rapidly focuses discovery efforts on the specific directional sector where the user is facing, as determined by the geomagnetic sensor data, thereby reducing connection delay.
3Loss of energy
If direction-based discovery is implemented using geomagnetic sensor, then only devices in user view direction are discovered, but this requires additional hardware and processing
Solution Approach 1:
The invention applies universality by making the geomagnetic sensor serve multiple functions. The same sensor that provides directional information for discovery filtering can also be used for other navigation and orientation purposes in the device, thereby amortizing the hardware cost and reducing overall system complexity.
Solution Approach 2:
The invention merges the direction detection function with the existing discovery process. Instead of adding a separate direction detection subsystem, the system integrates geomagnetic sensor data directly into the BLE discovery workflow, combining orientation data with device scanning operations to reduce overall system complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach improves user convenience by ensuring only relevant devices are discovered, reducing battery consumption and connection delays, while maintaining efficient BLE communication.
Implementation Method 1
obtains a first direction information related to a user from a second device, wherein the first direction information is information indicative of the progress direction of the user or the view direction of the user
Data Source
AI summary
This specification relates to a method for performing discovery in a wireless communication system. The method is performed by a first device, and includes turning on a direction-based discovery mode, obtains a first direction information related to a user from a second device, wherein the first direction information is information indicative of the progress direction of the user or the view direction of the user, exchanges a second direction information related to the locations of one or more peripheral devices with a third device, and performs discovery for a peripheral device existing in a specific direction among the peripheral devices based on the first direction information and the second direction information.