Mobile Receiver Power Control During Voice Pauses
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Solution Overview
Problem
Mobile communication devices face high power consumption during 3G UMTS circuit switched voice calls, particularly during speech pauses, where turning off the receiver to save power can result in missed information and user discomfort due to the lack of comfort noise and configuration data.
Innovation Solution
A detector is implemented to selectively deactivate the receiver during speech pauses, using a predetermined pattern of silence descriptor frames and DTX frames to maintain power savings while ensuring the reception of important signaling information and comfort noise generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the receiver is turned off during speech pauses to save power, then battery consumption is reduced, but important signaling information and comfort noise data may be missed
Solution Approach 1:
The patent segments the receiver operation into distinct active and inactive periods based on speech activity detection. The receiver is fully active during speech segments to capture all information, and selectively inactive during identified pause segments to conserve power. This segmentation resolves the contradiction by ensuring information is not lost during active periods while achieving power savings during inactive periods.
Solution Approach 2:
The system performs preliminary detection of speech pauses using voice activity detection algorithms before completely deactivating the receiver. This preliminary action identifies appropriate time intervals for receiver shutdown, ensuring that shutdown occurs only when no speech or critical signaling is present, thus preventing information loss while enabling power savings.
2Use of energy by moving object
If the receiver is turned off during speech pauses, then power consumption decreases, but the user may miss when the other person begins speaking again
Solution Approach 1:
The patent implements feedback mechanisms where the receiver periodically wakes up to monitor for speech resumption signals during pause periods. The system uses feedback from the network regarding upcoming speech segments to determine when to reactivate the receiver, ensuring reliable detection of speech resumption while minimizing unnecessary power consumption.
Solution Approach 2:
The receiver operates in a periodic cycle during speech pauses, alternating between active monitoring periods and inactive power-saving periods. This periodic action allows the system to maintain reliability by periodically checking for speech resumption while achieving power savings during the inactive intervals between checks.
3Reliability
If the receiver remains on continuously, then all information is received reliably, but battery life is significantly reduced
Solution Approach 1:
The patent makes the receiver operation dynamic by continuously adapting its state based on real-time speech activity detection and network conditions. The receiver transitions between active and inactive states dynamically rather than operating in a fixed continuous mode, ensuring reliable information reception when needed while optimizing battery life through adaptive power management.
Solution Approach 2:
The system changes operational parameters of the receiver based on detected speech patterns and network signaling. During identified pause periods, the receiver parameter changes from full-power operation to reduced-power or off state. This parameter change allows the system to maintain reliable information reception during speech segments while extending battery life during pause segments.
Data Source
AI summary
A method of controlling a mobile communications device receiver, which includes: activating the receiver, receiving a voice signal divided into a plurality of voice time intervals, detecting a silent voice time interval from content of the received voice signal, and deactivating the receiver during at least a portion of the silent voice time interval. In addition, the method may also include: receiving a signaling signal divided into a plurality of signaling time intervals, detecting an empty signaling time interval from the plurality of signaling time intervals, and deactivating the receiver during at least a portion of the empty signaling time interval.