BLE Master Device Synchronization via Offset Time Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Bluetooth Low Energy (BLE) technology in piconets lacks effective synchronization among multiple slave devices, preventing simultaneous transmission and reception of control information and data, leading to unsatisfactory synchronization in tasks such as audio data collection and multimedia teaching systems.
Innovation Solution
A synchronization control method where a master device sets a common reference time and determines a target count value and offset time for each slave device, allowing them to perform tasks at a synchronized reference time, improving synchronization among multiple slave devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the master device communicates with multiple slave devices using ACL logical transport links, then Bluetooth connections can be established between the master device and each slave device, but data transmission can only be performed between the master device and one slave device at a time, resulting in poor synchronization among multiple slave devices
Solution Approach 1:
The patent segments the communication process by introducing connection events with specific count values and offset times for each slave device. Instead of attempting simultaneous communication with all slave devices, the master device divides communication into discrete time slots defined by connection events, where each slave device is assigned a specific connection event count and offset time to transmit or receive data at different moments within the communication cycle.
Solution Approach 2:
The patent implements periodic communication cycles using connection events. Each slave device is configured with a target connection event count and offset time, creating a periodic communication pattern where data transmission occurs at regular intervals. This periodic structure allows the master device to systematically manage communications with multiple slave devices in a repeating cycle, improving synchronization while maintaining the ability to handle multiple devices.
2Reliability
If the master device sequentially communicates with multiple slave devices, then all slave devices can be connected to the master device, but the time required for data transmission increases, reducing communication efficiency
Solution Approach 1:
The patent applies preliminary action by pre-configuring each slave device with its target connection event count and offset time before actual data transmission begins. The master device calculates and assigns these parameters in advance, allowing slave devices to know exactly when they should transmit or receive data. This pre-planning eliminates the need for sequential handshaking and waiting during actual communication, significantly reducing transmission time while maintaining connection stability.
Solution Approach 2:
The patent introduces dynamic time slot allocation where each slave device is assigned a specific offset time relative to the connection event start time. This dynamic approach allows the master device to optimize communication timing for each slave device based on their specific requirements, rather than using fixed sequential intervals. The offset times can be adjusted to minimize total communication time while ensuring all devices receive appropriate attention.
Data Source
AI summary
Provided are a synchronization control method, a chip, an electronic device and a storage medium. A master device sets a reference time for a plurality of slave devices wirelessly connected to the master device; and determines a target count value K of a connection event and an offset time of a respective slave device for each of the plurality of slave devices. The master device transmits the target count value of the connection event and the offset time to the respective slave device, so that each of the plurality of slave devices performs control based on the target count value of the connection event and the offset time of the respective slave device, so as to perform a task at the reference time.