Adaptive PDCCH Decoding Sleep Schedule for UE Power Reduction
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Solution Overview
Problem
Wireless communication devices face significant battery strain due to the constant need to decode control signals, particularly the physical downlink control channel (PDCCH), where a high percentage of signals do not contain information for the device, leading to unnecessary power consumption.
Innovation Solution
Implementing an adaptive sleep schedule for PDCCH decoding, where the device dynamically prepares interrupts to decode PDCCH signaling, analyzes the results, and shuts down communication circuitry when no information is present, using finer timing resolutions such as OFDM symbol duration for scheduling and interrupt handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless communication circuitry continuously monitors and decodes PDCCH signaling, then the device maintains responsiveness and can receive information when available, but power consumption increases significantly due to unnecessary decoding when no information is present
Solution Approach 1:
The device performs preliminary actions by decoding the PDCCH signaling before fully activating the wireless communication circuitry. The circuitry is scheduled to prepare for and decode the PDCCH in advance, allowing the device to determine whether information is present before full operation begins. This preliminary decoding enables the circuitry to shut down quickly if no information is found, reducing overall power consumption while maintaining readiness when information is present.
Solution Approach 2:
The patent implements dynamic scheduling of the wireless communication circuitry based on the decoded PDCCH content. The circuitry transitions between active and shutdown states dynamically - remaining active only when needed based on real-time decoding results. This dynamic state change allows the system to adapt its power consumption to actual communication needs, balancing responsiveness with energy efficiency.
2Loss of information
If the device decodes every PDCCH signaling to ensure no information is missed, then information completeness is maintained, but time is wasted processing signals that contain no information for the device
Solution Approach 1:
The patent extracts only the necessary information from the PDCCH signaling by decoding it preliminarily before full circuit activation. The device takes out the control information from the signaling and processes it separately, allowing quick determination of relevance without fully engaging the complete communication circuitry. This extraction approach maintains information completeness for relevant signals while avoiding time waste on irrelevant ones.
3Ease of manufacture
If traditional sleep schedules are used without adaptive timing, then implementation is simple, but power savings are limited because the circuitry cannot shut down quickly enough after detecting no PDCCH information
Solution Approach 1:
The preliminary decoding of PDCCH signaling before full circuit activation enables faster shutdown timing. By completing the decoding action in advance, the system can immediately shut down the circuitry when no information is present, achieving superior power savings compared to traditional schedules that lack this preliminary action step.
Data Source
AI summary
This disclosure relates to implementing an adaptive sleep schedule for PDCCH decoding. In some embodiments, prior to receiving PDCCH signaling, a user equipment device may schedule wireless communication circuitry to prepare for and decode the PDCCH signaling, which may include dynamically preparing a first interrupt for the wireless communication circuitry to perform the preparing for and the decoding. In response to the first interrupt, the UE may prepare for and decode the PDCCH signaling using the wireless communication circuitry. The UE may analyze the result of the decoding, which may include determining that the PDCCH signaling does not comprise information for the UE. In response to determining that the PDCCH signaling does not comprise information for the UE, the UE may schedule the wireless communication circuitry to shut down, which may include dynamically preparing a second interrupt to shut down the wireless communication circuitry.