BLE Audio Broadcasting with Shared Reverse Control Slots
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Solution Overview
Problem
Traditional Bluetooth Low Energy (BLE) audio broadcasting technologies do not support reverse control and bi-directional communication in point-to-multipoint scenarios, especially when the number of slave devices is uncertain, limiting their application in music sharing and multi-room speaker scenarios.
Innovation Solution
A BLE audio broadcasting method that enables reverse control and bi-directional communication by using periodic advertising channels within consecutive isochronous intervals, allowing slave devices to transmit reverse communication data in shared reverse control time slots without the need for exclusive time slots allocation by the master device, enhancing controllability and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If exclusive reverse communication time slots are allocated for each slave device in PAWR protocol, then reverse control functionality is supported, but device complexity and pre-registration requirements increase
Solution Approach 1:
The patent merges the reverse communication functionality of multiple slave devices into a single shared time slot instead of allocating separate exclusive time slots to each device. This consolidation reduces the complexity of time slot management while maintaining the ability to support reverse control, directly resolving the contradiction between functionality and complexity.
Solution Approach 2:
The shared reverse control time slot serves as a universal resource that can be used by any slave device that needs to communicate with the master device. This multi-functional approach eliminates the need for pre-registration and exclusive allocation, allowing dynamic participation while reducing system complexity.
2Device complexity
If pre-determination of slave device information is required for PAWR, then exclusive time slot allocation is possible, but adaptability to dynamic device scenarios is reduced
Solution Approach 1:
The patent introduces dynamic access to the shared reverse control time slot, where slave devices can join and leave the network without pre-registration. The time slot allocation is no longer static and pre-determined but dynamically adaptable to the actual number and identity of slave devices, resolving the contradiction between manageability and adaptability.
Solution Approach 2:
Slave devices can autonomously access the shared reverse control time slot without requiring the master device to pre-allocate or pre-register them. This self-service mechanism allows devices to dynamically participate in reverse control communications, enhancing adaptability while simplifying the master device's management burden.
3Adaptability or versatility
If periodic advertising channels are used for reverse control, then communication flexibility is improved, but time slot sharing complexity increases
Solution Approach 1:
The patent utilizes periodic advertising channels with fixed periodicity to carry reverse control communications. This periodic structure provides a predictable and standardized time framework that simplifies coordination among multiple slave devices sharing the same time slot, reducing the complexity of time slot sharing while maintaining high communication flexibility.
Data Source
AI summary
BLE audio broadcasting methods, and devices are described. The BLE audio broadcasting method applied to one slave device of a BLE audio broadcasting system comprises: performing a BLE audio data broadcast communication with the master device in a plurality of consecutive isochronous intervals by the slave device; and performing a periodic advertising communication with reverse control with the master device based on a periodic advertising channel within one or more target isochronous intervals being one or more of the consecutive isochronous intervals. The periodic advertising communication with reverse control comprises: determining whether the present slave device is a target slave device that requires a reverse communication; and transmitting a reverse communication data based on the periodic advertising channel in one or more shared reverse control time slots in the one or more target isochronous intervals without need for the master device to allocate an exclusive time slot for the present salve device when the present slave device is determined to be the target slave device, wherein the one or more shared reverse control time slots can be occupied by any one of the slave devices when transmitting the reverse communication data. The present invention can realize reverse control and bi-directional communication of point-to-multipoint audio broadcast communication when information of the slave devices is uncertain, thereby enhancing controllability of the BLE audio broadcasting system.