Bluetooth Diversity Link Switching for Body-Blocked Wearables
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Solution Overview
Problem
Bluetooth signal transmission and reception are challenging due to obstacles like the human body and lack of radio reflecting surfaces, leading to unstable connections, especially in wearable devices like earpieces and headphones.
Innovation Solution
A system with two wearable devices, each with a transceiver and antenna, communicates through a separate channel to evaluate and switch to the best signal connection, using methods like near-field magnetic induction (NFMI) or ultra-wideband (UWB) for improved connectivity and power efficiency, while maintaining compatibility with Bluetooth standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single Bluetooth transceiver is used in wearable devices, then the device complexity is reduced, but the connection reliability deteriorates due to body shielding and lack of radio reflecting surfaces
Solution Approach 1:
The system divides the communication function into multiple independent transceivers (first transceiver and second transceiver) positioned at different locations on the wearable device. Each transceiver independently evaluates its connection to the remote device, allowing the system to segment the communication path and avoid single-point failure due to body shielding.
Solution Approach 2:
The system combines multiple transceivers into a unified communication system where both transceivers work together to maintain connection reliability. The transceivers share evaluation results and coordinate to select the optimal communication path, merging their capabilities to overcome the limitations of individual single-transceiver systems.
2Reliability
If multiple transceivers are used to improve connection reliability, then the connection stability improves, but the power consumption increases
Solution Approach 1:
The system dynamically selects which transceiver to use based on real-time connection evaluation. Both transceivers perform signal strength evaluations, but only the transceiver with the better connection is actively used for communication. This dynamic selection ensures connection stability while minimizing power consumption by keeping one transceiver in a lower-power state.
Solution Approach 2:
Each transceiver independently evaluates its own connection quality to the remote device and autonomously determines its suitability for active communication. This self-evaluation capability allows the system to make intelligent power management decisions without requiring complex centralized control, reducing overall system power consumption while maintaining reliability.
3Ease of operation
If transceivers are positioned on one side of the head, then the device design is simplified, but the connection quality deteriorates when the remote device is on the opposite side
Solution Approach 1:
The system places transceivers at different spatial locations (first transceiver and second transceiver positioned separately on the wearable device) to create local communication advantages. This spatial distribution ensures that at least one transceiver maintains a favorable geometric relationship with the remote device regardless of its position, overcoming the limitations of single-sided transceiver placement.
Solution Approach 2:
The system transitions from a single-point transceiver configuration to a multi-point spatial distribution of transceivers. By adding the spatial dimension of transceiver placement, the system creates multiple potential communication paths in different directions, allowing the connection to maintain quality even when the remote device moves to positions that would block a single transceiver's signal.
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 solution ensures stable and efficient wireless connections in adverse environments, optimizing power usage and maintaining compatibility with Bluetooth standards by dynamically switching to the strongest signal, even in situations where the remote device is positioned unfavorably relative to the wearable device.
Implementation Method 1
a first device (14) having a transceiver (22) and an antenna (21) operatively connected to the transceiver (22) and a second device (10) having a transceiver (24) and an antenna (23) operatively connected to the transceiver (24)
Implementation Method 2
The communications linkage between the first device and the second device may be a near field magnetic inductance (NFMI) wireless linkage
Data Source
AI summary
A first device having a transceiver and an antenna operatively connected to the transceiver and a second device having a transceiver and an antenna operatively connected to the transceiver, the first device in operative communication with the second device through a communications linkage separate from the transceiver of the first device and the transceiver of the second device. The first device is adapted to wirelessly communicate with a remote device through the transceiver of the first device. The second device is adapted to wirelessly communicate with the remote device through the transceiver of the second device. The system is configured to evaluate the wireless connection between the first device and the remote device and to evaluate the wireless communication between the second device and the remote device and determine whether the first device or the second device has a better connection.