Radio Communication System Packet Structure for Data Transmission
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Solution Overview
Problem
In radio communication systems employing digital audio communication, the data communication speed is limited, allowing only partial transmission of image signals during a single call, preventing users from enjoying a conversation while viewing images.
Innovation Solution
A radio communication system that reuses audio frames after disconnection of audio signal transmission, inserting data communication data into these frames, along with a mini-header indicating data type, to increase data transmission capacity during a single call.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If audio frames are used exclusively for audio communication, then audio communication quality is maintained, but data communication speed is limited
Solution Approach 1:
The audio frame structure is designed to serve dual purposes: during audio communication it carries audio data, and after call disconnection it carries data communication data. This multi-functionality allows the same transmission resource to be flexibly allocated based on communication phase, thereby increasing data transmission capacity without requiring separate dedicated channels.
Solution Approach 2:
The system dynamically switches the function of audio frames based on the communication state. During active calls, audio frames transmit audio data; after call disconnection, the same frames are repurposed for data communication. This dynamic adaptation allows the system to optimize resource utilization according to real-time communication needs, significantly boosting data communication speed.
2Quantity of substance
If data frames are used for data communication, then data can be transmitted, but the total data transmission capacity remains insufficient for complete image signal transmission
Solution Approach 1:
The invention merges audio frames and data frames into a unified transmission structure after call disconnection. Both frame types are used simultaneously for data communication, effectively doubling the available transmission capacity compared to using only data frames. This combination allows complete image signals to be transmitted within a single call duration.
3Device complexity
If the packet structure is simplified without mini-headers, then transmission overhead is reduced, but data type identification becomes difficult
Solution Approach 1:
The mini-header is selectively applied only to data frames, not to audio frames. This localized approach adds minimal overhead only where needed (for data type identification in data frames) while keeping the overall packet structure simple. The mini-header contains essential information such as data length and type, enabling efficient identification without complicating the entire packet structure.
Data Source
AI summary
In a radio apparatus that can simultaneously perform audio communication and data communication, the amount of data for data communication that can be transmitted during a single call is increased, and the communication speed of data communication is thereby increased. A transmission unit generates a packet in which an audio frame and a data frame, are consecutively arranged one after another. When receiving a transmission start command from a controller the transmission unit generates a packet in which data of an audio signal is inserted in the audio frame and data for data communication is inserted in the data frame, and when receiving a mode change command from the controller, the transmission unit generates and transmits, during a fixed time period from reception of the command, a packet in which data for data communication is inserted in the audio frame and the data frame.