Mobile Terminal Broadcast Reception Error Control
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Solution Overview
Problem
In network-linked digital terrestrial television broadcasting, the integration of 1 segment broadcasting service with data communication on mobile terminals like cellular phones faces challenges due to reception errors caused by interference from data communication transmission electric waves, leading to unstable video quality and lack of accuracy in preventing broadcast interruptions.
Innovation Solution
A system and method that includes broadcast reception, wireless communication, error detection, and control mechanisms to stop data communication transmission when a bit error rate exceeds a threshold, ensuring stable reception of the 1 segment broadcasting service by prioritizing broadcast data integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If data communication transmission operation is performed simultaneously with 1 segment broadcasting service reception, then data communication functionality is improved, but reception stability deteriorates due to transmission electric wave interference
Solution Approach 1:
The system performs preliminary detection of bit error rates in the broadcast data before the interference causes severe reception degradation. By continuously monitoring the BER and comparing it against predetermined thresholds, the system can anticipate interference issues and take preventive actions to maintain reception stability while allowing data communication to operate.
Solution Approach 2:
The system implements a feedback mechanism where the bit error rate detection results are fed back to the control unit, which then adjusts the data communication transmission operation accordingly. When the BER exceeds the threshold, the system automatically suspends or adjusts the data communication transmission, creating a closed-loop control system that balances both functions.
2Measurement precision
If bit error rate detection threshold is set low to ensure high reception accuracy, then reception quality is improved, but system sensitivity to interference increases causing frequent transmission interruptions
Solution Approach 1:
The system dynamically adjusts the BER threshold parameter based on current reception conditions and interference levels. Instead of using a fixed threshold, the system can modify the threshold value to balance between detection sensitivity and avoiding false interruptions. This allows the system to maintain high reception quality while reducing unnecessary transmission suspensions.
Solution Approach 2:
The threshold setting is made dynamic rather than static. The system can adapt the BER threshold based on real-time conditions such as signal strength, interference levels, and current transmission quality. This dynamic adjustment allows the system to optimize between reception accuracy and transmission continuity under varying operational conditions.
3Speed
If data communication transmission power is increased to improve communication speed, then communication efficiency is improved, but reception error rate increases due to stronger interference
Solution Approach 1:
The system dynamically adjusts the data communication transmission power level based on real-time BER monitoring. When the BER indicates high interference levels, the system automatically reduces the transmission power to prevent further reception degradation. This dynamic power control allows the system to optimize communication speed while maintaining reception reliability.
Solution Approach 2:
The transmission power parameter is made variable rather than fixed. The system can adjust the power level based on the detected BER and current interference conditions. This allows the system to achieve high communication speeds when interference is low while automatically reducing power to maintain reliability when interference increases, thus resolving the contradiction between speed and error rate.
Data Source
AI summary
In a cellular phone terminal, a bit error rate measurement section measures a bit error rate of broadcast data received by a broadcast reception section for receiving a digital broadcast to output broadcast data while a transmission operation of a communication transmission section for wirelessly communicating with a broadcasting communication network is performed. When the measured bit error rate is equal to or higher than a predetermined threshold, stopping of the transmission operation of the communication transmission section is instructed. Thus, a failure such as interruption of television broadcasting reproduction can preliminarily be prevented by avoiding error occurrence in reception of the 1 segment broadcasting service due to an influence of a transmission electric wave in data communication. As a result, stable reception of the 1 segment broadcasting service can be executed.