Bluetooth Auto-Pairing via FHS and EIR Packets
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Solution Overview
Problem
Existing Bluetooth auto-pairing technologies require devices to switch to specific operation modes and support Bluetooth Low Energy (BLE) technology to transmit advertising packets, making the pairing process complex and time-consuming, and limiting compatibility with non-BLE devices.
Innovation Solution
A Bluetooth communication system that enables auto-pairing between devices without the need for Bluetooth advertising packets by using Frequency Hop Synchronization (FHS) and Extended Inquiry Response (EIR) packets, allowing devices to initiate pairing in inquiry scan mode without switching to BLE-specific operation modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If Bluetooth advertising packets are used to initiate auto-pairing procedure, then pairing can be automated, but devices must switch to specific operation modes and support BLE technology, increasing device complexity and procedure time
Solution Approach 1:
The patent extracts the auto-pairing initiation capability from the BLE advertising packet framework and implements it using classic Bluetooth inquiry and FHS packets. This allows non-BLE devices to perform auto-pairing without requiring BLE-specific operation modes, thereby reducing device complexity while maintaining automation.
Solution Approach 2:
The patent makes the inquiry procedure universal by enabling both BLE and non-BLE devices to initiate auto-pairing through the same classic Bluetooth inquiry mechanism. The inquirer-side device can send inquiry requests and parse FHS packets to obtain device information and initiate pairing, eliminating the need for separate BLE advertising packet mechanisms.
2Loss of information
If Bluetooth advertising packets are used for auto-pairing, then pairing information can be transmitted, but the procedure time increases due to mode switching requirements
Solution Approach 1:
The patent performs preliminary actions by embedding pairing information directly in the FHS packet during the inquiry phase. The inquirer-side device parses the FHS packet to obtain the requester-side Bluetooth address and other identification information, enabling immediate pairing initiation without waiting for separate advertising packet exchanges.
3Extent of automation
If BLE technology is required for advertising packet transmission, then auto-pairing can be implemented, but compatibility with non-BLE devices is lost
Solution Approach 1:
Instead of requiring devices to support BLE advertising packets for auto-pairing, the patent inverts the approach by using classic Bluetooth inquiry packets that all Bluetooth devices can handle. The inquirer-side device sends a classic Bluetooth inquiry request, and the requester-side device responds with an FHS packet containing pairing information, enabling auto-pairing for both BLE and non-BLE devices.
Data Source
AI summary
A Bluetooth communication system includes: an inquirer-side Bluetooth device arranged to operably generate and transmit a Bluetooth inquiry request; and a requester-side Bluetooth device arranged to operably receive and parse the Bluetooth inquiry request, and to operably generate and transmit a Frequency Hop Synchronization (FHS) packet containing a requester-side Bluetooth address and an Extended Inquiry Response (EIR) packet containing an auto-pairing request to the inquirer-side Bluetooth device. The inquirer-side Bluetooth device conducts an auto-pairing procedure with the requester-side Bluetooth device according to the contents of FHS packet and the EIR packet, but the inquirer-side Bluetooth device and the requester-side Bluetooth device does not switch to operating modes for transmitting or receiving Bluetooth advertising packets before conducting the auto-pairing procedure.