BLE Host Scan Control for Priority Device Connection
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Solution Overview
Problem
Conventional Bluetooth Low Energy (BLE) communication systems experience delays due to full channel scans when connecting to multiple peripheral devices, leading to user wait times before establishing connections.
Innovation Solution
A control method that prioritizes BLE communication by obtaining a high-priority list of peripheral devices, triggering a first scan, and stopping it once all high-priority devices are found, allowing immediate connection establishment without scanning the entire channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a full scan is performed on the whole communication channel, then all peripheral devices can be found, but the connection establishment time is delayed
Solution Approach 1:
The patent segments the device discovery process into two phases: a fast first scan that targets high-priority devices only, and a subsequent full scan for complete device discovery. This segmentation allows the system to prioritize connection establishment with important devices while still maintaining the option to discover all devices if needed.
Solution Approach 2:
The patent performs preliminary actions by pre-establishing a high-priority list of peripheral devices before scanning. The BLE host then performs a first scan specifically targeting these high-priority devices first, allowing connection establishment to begin before the complete device discovery process finishes.
2Reliability
If a full scan is performed on the whole communication channel, then all peripheral devices can be discovered, but power consumption increases
Solution Approach 1:
The patent segments the device discovery process into two phases: a fast first scan that targets high-priority devices only, and a subsequent full scan for complete device discovery. This segmentation allows the system to prioritize connection establishment with important devices while still maintaining the option to discover all devices if needed.
Solution Approach 2:
The patent applies partial action by performing only a partial scan (first scan) focused on high-priority devices when that is sufficient for the user's needs. The complete full scan is performed only when necessary, reducing overall power consumption while maintaining discovery capability.
3Reliability
If the BLE host waits for full scan completion, then all devices are discovered, but user experience deteriorates due to long delay
Solution Approach 1:
The patent performs preliminary actions by pre-establishing a high-priority list of peripheral devices before scanning. The BLE host then performs a first scan specifically targeting these high-priority devices first, allowing connection establishment to begin before the complete device discovery process finishes.
Solution Approach 2:
The patent introduces dynamic behavior by allowing the scanning process to be interrupted or stopped early once high-priority devices are found. The system can adaptively switch from a rapid first scan mode to a more comprehensive full scan mode based on whether high-priority devices are successfully discovered.
Data Source
AI summary
A control method, suitable for a host device including a Bluetooth low energy communication circuit, includes following operations. A high priority list is obtained. The high priority list includes information about at least one first peripheral device. The BLE communication circuit is triggered to perform a first scan to search for any peripheral device around the host device. A first search result of the first scan is compared with the high priority list. In response to that the first search result covers all of the at least one first peripheral device in the high priority list, the BLE communication circuit is triggered to stop the first scan. The BLE communication circuit is triggered to communicate with the at least one first peripheral device found in the first scan.