Communication Apparatus Slot Switching Priority Voice Recording
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Solution Overview
Problem
Communication apparatuses using the DMR scheme face issues where users experience interruptions in voice calls when a higher-priority signal is received in a different slot, causing the apparatus to switch slots mid-call, leading to incomplete voice transmission and lack of recognition by the other party.
Innovation Solution
A communication apparatus equipped with a receiving circuit, voice signal decoding circuit, recording device, and control circuit that determines priority based on received signals and switches slots for voice output from the first slot to the second slot when a higher-priority signal is detected in the second slot, while recording the voice signal from the first slot.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the communication apparatus switches slots for voice output when a higher-priority signal is received, then the priority-based communication is improved, but the voice transmission continuity deteriorates
Solution Approach 1:
The system performs preliminary actions by recording the voice signal from the first slot before switching to the second slot. The recording device captures and stores the voice data in advance, ensuring that no voice information is lost during the slot switching process. This preliminary recording action resolves the contradiction by preparing the voice data beforehand so that continuity is maintained even when switching occurs for priority-based communication.
2Speed
If the communication apparatus switches slots for voice output when a higher-priority signal is received, then the responsiveness to priority signals is improved, but the information completeness deteriorates
Solution Approach 1:
The system creates a copy of the voice signal from the first slot and stores it in the recording device before switching to the second slot. This copying mechanism ensures that the original voice information is preserved and not lost during the slot switching process. The copy serves as a backup that maintains information completeness while allowing the system to respond quickly to priority signals by switching slots.
3Measurement precision
If the communication apparatus continuously monitors both slots, then the priority detection capability is improved, but the system complexity increases
Solution Approach 1:
The system segments the monitoring function by dedicating separate processing paths for the first slot and second slot. The receiving circuit is configured to receive signals from both slots independently, and the control circuit separately processes priority detection for each slot. This segmentation allows precise priority detection without requiring a single complex monitoring system, thereby reducing overall system complexity while maintaining high detection capability.
Data Source
AI summary
In a communication apparatus, a receiving unit receives signals alternately in a first slot and a second slot according to a time division multiplexing access scheme. A voice signal decoding unit decodes a voice signal of one of a first reception signal and a second reception signal. A recording device records the first or second reception signal. A baseband signal processing unit determines a priority from information contained in the first and second reception signals, and outputs information about the priority. When the first reception signal is received in the first slot and then the second reception signal having a priority higher than that of the first reception signal is received, a control circuit switches a slot for outputting a voice to a second slot, and makes the recording device start recording the first reception signal.