Wireless UE Sleep Deactivator for Standby Time Extension
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Solution Overview
Problem
Cellular handsets in idle or connected modes face challenges in conserving battery power during discontinuous reception (DRX) mode, as frequent transitions between sleep and active modes reduce standby and connect times due to increased power consumption when awakening to check for paging indicators or control messages.
Innovation Solution
A wireless user equipment device with a sleep deactivator that anticipates and activates before expected messages, incorporating a signal quality assessor and channel estimator to determine optimal symbol timing, thereby reducing unnecessary power usage and extending standby time by minimizing pre-frame intervals and eliminating the need for multi-path searching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cellular handset frequently transitions between sleep mode and active mode to check for paging indicators or control messages, then the device can detect messages in a timely manner, but the standby time and connect time are shortened due to increased power consumption
Solution Approach 1:
The device performs preliminary actions by activating before the expected message arrival time and using blind decoding with hypothesis testing to prepare for message reception. The sleep deactivator activates the device in advance, and the hypothesis testing unit evaluates multiple timing hypotheses before the actual message arrives, reducing the need for frequent wake-ups while ensuring reliable detection.
Solution Approach 2:
The patent replaces the conventional multi-path searcher mechanism with a blind decoding approach using hypothesis testing. Instead of using complex signal processing to search for multi-path signals, the device directly tests multiple timing hypotheses and selects the best match, simplifying the system while maintaining detection reliability.
2Reliability
If the device activates early and frequently to ensure message detection, then message reliability improves, but energy consumption increases
Solution Approach 1:
The device performs partial action by activating only for the minimum necessary duration to check for messages, rather than remaining fully active. The sleep deactivator activates the device just before expected message times, and the hypothesis testing unit quickly evaluates timing hypotheses, using just enough energy to ensure reliable detection while minimizing overall power consumption.
Solution Approach 2:
The patent replaces energy-intensive conventional message detection mechanisms with a more efficient blind decoding approach. The hypothesis testing unit evaluates timing hypotheses using simplified signal processing rather than full signal acquisition and multi-path searching, significantly reducing the energy required for each detection cycle while maintaining reliability.
3Measurement precision
If the device uses conventional multi-path searchers to determine symbol timing, then timing accuracy can be achieved, but device complexity increases
Solution Approach 1:
The patent extracts and removes the complex multi-path searcher component from the signal processing chain. Instead of using conventional multi-path searchers to determine symbol timing, the device directly applies blind decoding with hypothesis testing, extracting only the essential timing information needed without the overhead of complex signal processing algorithms.
Solution Approach 2:
The patent substitutes complex mechanical signal processing (conventional multi-path searchers) with a simpler computational approach (blind decoding with hypothesis testing). The hypothesis testing unit directly evaluates timing hypotheses by comparing received signals with expected signal structures, achieving timing accuracy without the complexity of traditional signal processing methods.
Data Source
AI summary
The present disclosure describes a wireless user equipment (UE) device that can receive a communication signal that may be transmitted along a wireless channel. The wireless user equipment device can include a sleep deactivator that periodically activates wireless user equipment from a sleep mode periodically in advance of a periodically transmitted message, such as a paging indicator or a control message that is expected to be received within a slot of time. The wireless user equipment device can also include an element that can extract the message during multiple sub-intervals, a signal quality assessor that can a) assess the quality of the indicator in the sub-intervals and b) assign a signal quality metric for the sub-intervals. The wireless UE device can also include a channel estimator that can estimate a physical channel over which the communication signal is transmitted. The wireless UE device can also assign a quality metric to the extracted message at each sub-interval to select a sub-interval that is most consistent with timing of the paging indicator or control message.