Bluetooth Near-Field Equipment Using A2DP AVRCP Profiles for Reliable Data
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Solution Overview
Problem
Existing near-field wireless communication equipment, such as Bluetooth devices, require additional profiles like SPP/PAN for data communication, increasing production costs and having low coverage rates, with existing Bluetooth profiles not installed in all devices, leading to reliability issues in data transmission.
Innovation Solution
Implementing a method where near-field wireless communication equipment uses different profiles for uplink and downlink data communication, allowing for bidirectional data exchange using A2DP/AVRCP profiles, ensuring data reliability and validity by alternating transmission and response data using distinct communication protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional profiles like SPP/PAN are installed for data communication, then data communication capability is improved, but production cost increases
Solution Approach 1:
The patent makes existing audio profiles (A2DP for audio data, AVRCP for control commands) perform dual functions: their original purposes plus data communication. By embedding data communication functionality within these universally installed profiles, the system achieves data communication capability without adding dedicated profiles, thus avoiding increased production costs while maintaining versatility
2Reliability
If dedicated data communication profiles are installed, then data communication reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges data communication functionality with existing audio communication profiles. Instead of maintaining separate dedicated data communication profiles, the system combines data transmission capabilities within the A2DP and AVRCP profiles that are already present for audio purposes, thereby reducing overall system complexity while maintaining communication reliability
3Ease of operation
If one-way data communication is used with existing profiles, then ease of operation is improved, but data transmission reliability deteriorates
Solution Approach 1:
The patent implements bidirectional communication using A2DP and AVRCP profiles, enabling the slave device to send acknowledgment signals back to the master device. This feedback mechanism allows the transmitting device to verify successful data reception, thereby ensuring data transmission reliability while maintaining operational simplicity through the use of existing profile protocols
4Adaptability or versatility
If commonly installed profiles are used for data communication, then coverage rate is improved, but data communication reliability deteriorates due to one-way communication
Solution Approach 1:
The patent dynamically utilizes the roles and capabilities of existing A2DP and AVRCP profiles to establish bidirectional data communication. By allowing the slave device (typically audio-only) to also function as a data transmission source with acknowledgment capabilities, the system achieves reliable two-way communication using universally installed profiles, thereby improving both coverage rate and reliability simultaneously
Data Source
AI summary
A wireless communication equipment capable of securing the reliability and validity of transmission data, for example, a near-field wireless communication equipment compliant with Bluetooth, is provided. A near-field wireless communication equipment (10) compliant with Bluetooth alternately repeats an alternate monitoring operation when a master-side counter information equipment (20) is located close to the near-field wireless communication equipment (10) and data communication between them is made possible, the alternate monitoring operation being reception of transmission data to which an A2DP profile is applied from the master-side counter information equipment (20) as a DTMF signal and then transmission of an ACK signal or a NAK signal back to the master-side counter information equipment (20) as response data indicating a result of analyzing the transmission data using an AVRCP profile or transmission of transmission data to which the A2DP profile is applied to the master-side counter information equipment (20) and then reception of response data indicating a result of analyzing the transmission data from the master-side counter information equipment (20) using the AVRCP profile.