Wireless Device Reconnection via Dynamic Scan Adjustment
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Solution Overview
Problem
In one-to-many wireless communication systems, such as IoT systems, reconnection processes after disconnection cause communication delays, which are undesirable in environments where timely communication is critical, especially in scenarios like battery monitoring where periodic data transmission is essential.
Innovation Solution
A wireless communication device with a processor that periodically checks connections and uses a strategy of switching reception frequencies among advertising channels to quickly reestablish communication by adjusting scan intervals and windows, ensuring minimal delay and maintaining continuous data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reconnection is performed with priority over ongoing communication, then reconnection speed is improved, but communication delay increases for devices that remain connected
Solution Approach 1:
The patent implements dynamic adjustment of scan interval and scan window parameters based on connection status. When disconnection is detected, the scan window is extended and scan interval is adjusted to prioritize reconnection. When connected, normal communication parameters are maintained, thus adapting the system behavior to current conditions and resolving the contradiction between reconnection priority and communication continuity.
Solution Approach 2:
The patent changes communication parameters (scan interval, scan window) dynamically based on connection state. By adjusting these parameters, the system can quickly switch between normal communication mode and reconnection priority mode, ensuring both reliable reconnection and minimal communication delay for active connections.
2Productivity
If communication is performed with priority over reconnection, then communication continuity is maintained, but reconnection time increases
Solution Approach 1:
The system dynamically adjusts the scan window size and scan interval based on whether a disconnection has been detected. During normal operation, communication proceeds with standard parameters. Upon detecting disconnection, the system transitions to an extended scan window mode that prioritizes reconnection, thus maintaining productivity during normal operation while enabling rapid reconnection when needed.
Solution Approach 2:
The patent performs preliminary actions by continuously monitoring connection status and preparing reconnection parameters in advance. When disconnection is detected, the system has already positioned itself to quickly initiate reconnection with pre-configured scan windows, reducing the actual reconnection time while maintaining communication continuity during normal operation.
3Reliability
If scan window is extended to improve reconnection detection, then reconnection speed is improved, but communication resources are consumed
Solution Approach 1:
The patent implements periodic scanning with variable window sizes based on connection state. Instead of continuously extending the scan window, the system uses periodic scans with normal window sizes during connected state, and only extends the window periodically when disconnection is detected. This periodic adjustment reduces overall resource consumption while maintaining fast reconnection detection capability when needed.
Data Source
AI summary
According to one embodiment, a wireless communication device includes a communication unit and a processor. The processor determines whether a first wireless device is connected to the wireless communication device. When the processor determines connection of the first wireless device, the processor switches a reception frequency of the communication unit among frequencies, and restart periodic communication with the wireless devices after receiving an advertising signal transmitted from the first wireless device.