Wireless Audio Connection via Dual-Address LE Audio Broadcast
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Solution Overview
Problem
Existing Bluetooth low energy audio (BLE Audio) connection methods for wireless audio devices, such as true wireless stereo (TWS) earphones, are slow due to the need to establish connections sequentially within a coordinated set, requiring the electronic device to first connect with one earphone and then determine the second earphone using a coordinated set identification protocol (CSIP), which prolongs the initial connection time.
Innovation Solution
A connection method that bypasses the CSIP protocol by transmitting a broadcast signal from one audio device carrying both Bluetooth addresses, allowing the electronic device to simultaneously establish LE Audio connections with both audio devices, utilizing Bluetooth Low Energy (BLE) broadcast signals or Extended Inquiry Response (EIR) packets to quickly obtain and connect with both earphones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic device establishes connections sequentially using the coordinated set identification protocol (CSIP), then the connection process can be completed, but the initial connection time is prolonged
Solution Approach 1:
The first audio device performs preliminary action by determining the second Bluetooth address and preparing both addresses for broadcast before the electronic device initiates connection scanning. This allows the electronic device to have both addresses ready for simultaneous connection establishment, eliminating the sequential connection delay.
Solution Approach 2:
The patent merges the broadcast of multiple Bluetooth addresses into a single broadcast signal transmitted by the first audio device. Instead of the electronic device scanning for addresses sequentially or using complex CSIP protocols, both Bluetooth addresses are combined and broadcast together, enabling parallel connection establishment with both audio devices.
2Reliability
If the electronic device uses the coordinated set identification protocol (CSIP) to determine the second audio device, then the connection can be established, but the connection speed is reduced
Solution Approach 1:
The patent extracts the second Bluetooth address from the coordinated set identification protocol and includes it directly in the broadcast signal. This removes the need for the electronic device to perform CSIP determination, allowing immediate use of the address for connection establishment without protocol overhead.
Solution Approach 2:
The first audio device copies its own Bluetooth address information and the second audio device's Bluetooth address into the broadcast signal structure. This copying allows the electronic device to receive and process both addresses simultaneously without needing to perform complex identification protocols, thereby increasing connection speed.
3Reliability
If the electronic device scans for broadcast signals and obtains Bluetooth addresses sequentially, then the connection process can be completed, but the overall connection time increases
Solution Approach 1:
The patent ensures continuity of useful action by having the first audio device broadcast both Bluetooth addresses continuously and simultaneously in a single broadcast signal. This eliminates gaps and sequential processing steps, allowing the electronic device to obtain both addresses in one continuous scanning action, thereby reducing overall connection duration.
Data Source
AI summary
A connection method for an audio device, and a device are provided. The connection method for the audio device being applied to a wireless audio device, the wireless audio device including a first audio device and a second audio device, the first audio device having a first Bluetooth address, the second audio device having a second Bluetooth address. The method includes determining, by the first audio device, the second Bluetooth address of the second audio device; transmitting, by the first audio device, a first broadcast signal carrying the first Bluetooth address and the second Bluetooth address; and establishing, by the first audio device, an LE Audio connection with an electronic device based on the first Bluetooth address; and establishing, by the second audio device, an LE Audio connection with the electronic device based on the second Bluetooth address.