Bluetooth Point-Multipoint Transmission via Asynchronous Packet Links
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Solution Overview
Problem
Existing Bluetooth technology is limited in establishing point-to-multipoint links with more than three devices and maintaining signal quality over long distances, as it typically allows only point-to-point connections and has issues with signal disturbances due to insufficient bandwidth in scatternet configurations.
Innovation Solution
The solution involves using asynchronous packet data links and dynamically configuring electronic devices as masters or slaves based on activation signals, allowing for increased distances and the number of connected devices through optimized resource utilization and efficient bandwidth management, particularly by employing Bluetooth technology with unidirectional asynchronous connectionless links (ACL) for packet data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If Bluetooth technology is used for point-to-point connection, then connection simplicity is improved, but the number of simultaneously connected devices is limited to two
Solution Approach 1:
The patent divides the Bluetooth connection system into master and slave roles, where the master device can establish multiple independent connections with different slave devices simultaneously. This segmentation allows one device to maintain multiple point-to-point connections without interfering with each other, thereby increasing the number of connected devices while preserving connection simplicity.
Solution Approach 2:
The master device is designed with multi-functionality to simultaneously manage multiple slave devices in different piconets. The system allows a single master device to perform multiple functions: connecting to multiple slaves, maintaining multiple active conversations, and managing resources across different connections, thus increasing connectivity capacity without complicating individual connections.
2Adaptability or versatility
If scatternet configuration is used to increase number of connected devices, then connectivity capacity is improved, but signal disturbances occur due to insufficient bandwidth
Solution Approach 1:
The patent segments the communication network into multiple independent piconets, each with its own master-slave relationships. This segmentation isolates traffic flows, preventing interference between different connections and maintaining signal quality even as the number of connected devices increases. Each piconet operates independently, avoiding the bandwidth congestion that would occur in a single large scatternet.
Solution Approach 2:
The system dynamically manages resources across multiple piconets by allowing flexible master-slave role assignments and adaptive connection establishment. The master device can dynamically allocate time slots and frequency resources to different slaves based on current network conditions, optimizing bandwidth utilization and preventing signal disturbances while maintaining high connectivity capacity.
3Length of stationary object
If maximum transmission distance is increased to 1 Km for point-to-point link, then coverage range is improved, but the distance for point-to-multipoint link is reduced to a few dozen meters
Solution Approach 1:
The patent segments the transmission path into multiple hops, where each hop represents a point-to-point connection between adjacent devices. By breaking the long point-to-multipoint path into shorter sequential segments (master to slave 1, master to slave 2, etc.), the system maintains long overall coverage while ensuring that each individual transmission hop remains within optimal Bluetooth range, thus resolving the distance-capability contradiction.
Data Source
AI summary
An electronic device for point-to-multipoint transmission of a digital signal over a radio communication network includes a transmitter-receiver configured to receive a radio-frequency input digital signal and generate therefrom a baseband digital signal and includes a digital signal processor. The digital signal processor includes a receiving module, an input buffer, an audio decoder module and an output buffer. The transmitter-receiver is further configured to receive the duplicated baseband output digital signal and generate therefrom a radio-frequency output digital signal. The transmitter-receiver is configured to receive the radio-frequency input digital signal on the basis of Bluetooth® specifications and transmit the radio-frequency output digital signal on the basis of Bluetooth® specifications, and the microcontroller is configured to realize a unidirectional asynchronous packet data link. There is further described a system for point-to-multipoint radio transmission including a plurality of electronic devices for point-to-multipoint transmission of a digital signal over a radio communication network.