Mobile Receiver Power Saving via Intermittent Data Burst Transmission
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Solution Overview
Problem
The high power consumption of demodulators in mobile devices due to continuous data processing in existing ATSC A/53 digital television broadcasting standards, which is not significantly reduced by reducing data transfer rates for mobile devices.
Innovation Solution
Implementing a transmission method where a first set of data is continuously transmitted, and a second set of data is intermittently transmitted with time intervals allowing receivers to enter and exit a power saving mode, with the first set being digital television programming for terrestrial TV and the second set for mobile receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If data is transmitted continuously using ATSC A/53 standard, then high data transfer rate is provided, but power consumption requirements of demodulator become significant
Solution Approach 1:
The patent segments the data transmission into two distinct sets: a first set transmitted continuously for terrestrial TV and a second set transmitted intermittently for mobile devices. This segmentation allows mobile receivers to skip continuous data processing and only decode intermittent bursts, significantly reducing power consumption while maintaining acceptable data transfer rates for mobile applications.
Solution Approach 2:
The patent implements periodic transmission of the second data set with intentional gaps between transmissions. These gaps are specifically designed to allow mobile receivers to enter power saving mode during the idle periods, then wake up to receive the next burst. This periodic action pattern transforms continuous power consumption into intermittent power consumption, directly addressing the energy consumption problem.
2Use of energy by moving object
If data transfer rate is reduced for mobile devices, then power consumption is reduced, but data reception reliability deteriorates
Solution Approach 1:
By segmenting the transmission into continuous (first set) and intermittent (second set) streams, the patent allows mobile devices to receive data at lower rates during intermittent transmissions without significantly impacting reliability. The segmentation enables devices to prioritize reliability for essential data while accepting lower rates for non-critical data, optimizing the reliability-power consumption tradeoff.
Solution Approach 2:
The periodic transmission pattern with controlled gaps allows receivers to accumulate and process data during active periods, then enter power saving mode. This periodic action maintains reception reliability for mobile applications by ensuring data is transmitted at appropriate intervals rather than continuously at high rates, thus maintaining reliability while reducing power consumption.
3Quantity of substance
If receiver continuously monitors all transmitted data, then data completeness is maintained, but processing time and energy consumption increase
Solution Approach 1:
The patent segments data into two streams with different transmission patterns, allowing receivers to selectively process only the intermittent second set according to their needs. This segmentation enables receivers to reduce processing time by skipping continuous data monitoring while maintaining completeness for the intermittent stream, directly addressing the time-completeness tradeoff.
Solution Approach 2:
The periodic transmission pattern creates natural processing cycles where receivers can complete data reception during active periods, then enter power saving mode. This periodic action reduces processing time by eliminating continuous monitoring requirements while maintaining data completeness through the structured burst pattern, allowing receivers to process data in manageable intervals rather than continuously.
Data Source
AI summary
An implementation exits a power saving mode for fixed and periodic active periods of time to receive a separate burst transmission from a first stream during each of the corresponding active periods of time. The first stream is received at a first-stream burst data rate. The first stream includes data configured to be displayed at a first playback rate that is substantially less than the first-stream burst data rate. During the active periods of time, data is received from a second stream at a second-stream rate. The second stream includes data configured to be displayed at a second playback rate that is substantially the same as the second-stream rate. After receiving each of the burst transmissions from the first stream during the active periods of time, the power saving mode is entered for corresponding fixed and periodic power-saving periods of time while waiting for another burst from the first stream.