Wireless Audio Transmission Channel Switching
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Solution Overview
Problem
Existing wireless audio transmission methods face interference and noise issues when sharing communication channels with other wireless devices like wireless LAN, leading to intermittent audio signal transmission and noise generation, especially when priority is given to higher-priority communications or when non-communication devices like microwave ovens are used.
Innovation Solution
A wireless audio transmission method that selectively uses multiple channels by performing carrier sense and adjusting stand-by times to transmit audio packets, prioritizing audio packet transmission while minimizing interference with other wireless communications, and dynamically switching channels based on usage states and error rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If audio signal transmission occupies a communication channel continuously, then audio transmission continuity is improved, but other wireless apparatuses cannot communicate
Solution Approach 1:
The communication channel is segmented into multiple sub-channels or time slots, allowing audio transmission to occupy only portions of the channel rather than the entire channel continuously. This enables other wireless apparatuses to use the remaining portions for their communications.
Solution Approach 2:
The audio transmission system implements periodic channel access by waiting for designated transmission opportunities rather than continuous occupation. The system periodically checks channel status and transmits audio packets at appropriate intervals, allowing other devices to communicate in between.
2Reliability
If priority is given to wireless LAN communication, then communication reliability is improved, but audio signal transmission becomes intermittent causing noise
Solution Approach 1:
The transmission priority is made dynamic rather than static. The system adjusts its behavior based on real-time channel conditions and communication needs, allowing audio transmission to maintain continuity by adapting to when other wireless devices are active and seizing available opportunities for audio packet transmission.
Solution Approach 2:
The audio transmission system implements continuous useful action by maintaining persistent channel monitoring and ready-state, ensuring that audio transmission can resume immediately when channel conditions permit, thus minimizing interruptions and maintaining audio quality.
3Adaptability or versatility
If stand-by time is extended to allow other communications, then channel sharing fairness is improved, but audio transmission delay increases
Solution Approach 1:
The stand-by time parameter is dynamically adjusted based on channel conditions, traffic patterns, and communication priorities. Rather than using a fixed stand-by time, the system optimizes this parameter to balance fairness with other devices against the need for rapid audio transmission.
Data Source
AI summary
In a wireless audio system in which both wireless audio signal transmission and communication using other wireless apparatuses are carried out, the transmitter and the receiver transmit audio packets by the following procedure using a plurality of communication channels shared with other wireless communication. The transmitter and the receiver select the same channel; after detecting that the channel has become idle, the transmitter stands by for only a stand-by time T1 shorter than the shortest packet space stipulated in the procedure of the other wireless communication and then transmits an audio packet; after the reception of the audio packet is completed, the receiver stands by for only a stand-by time T2 shorter than the shortest packet space and then returns a response signal. After the transmission/reception of a predetermined number of audio packets is completed, the transmitter and the receiver switch the communication channel and repeat the procedure.