Multi-TRP PDCCH Power-Saving Signaling for Precise UE Wake-Up
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Solution Overview
Problem
Existing wireless communication technologies lack specifications for configuring UE to monitor power saving signaling on the PDCCH, leading to uncertainty about when to wake up for PDCCH monitoring, resulting in inefficient power consumption.
Innovation Solution
A method and device for a user equipment (UE) to receive DRX and power saving signaling configurations from a base station, specifying a time offset before the DRX on-duration time to initiate PDCCH monitoring, allowing optimized power saving signaling monitoring occasions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE monitors PDCCH continuously to ensure reliable reception, then the reliability of signal reception is improved, but the power consumption increases
Solution Approach 1:
The base station transmits power saving signaling in advance (before DRX on-duration time) to instruct the UE whether to wake up for PDCCH monitoring. This preliminary action allows the UE to make informed decisions about wake-up timing, avoiding unnecessary power consumption while ensuring reliable signal reception when needed.
Solution Approach 2:
The power saving signaling mechanism provides feedback to the UE about whether wake-up is necessary. The UE receives configuration information from the base station and uses this feedback to determine the appropriate monitoring behavior, optimizing the balance between power saving and reception reliability.
2Use of energy by moving object
If the UE reduces PDCCH monitoring occasions to save power, then the power consumption is reduced, but the reliability of reception may deteriorate
Solution Approach 1:
The base station provides advance configuration information through power saving signaling that specifies exactly when the UE should monitor PDCCH. This preliminary configuration ensures the UE monitors at the correct times without missing important signals, maintaining reception reliability while reducing unnecessary monitoring.
Solution Approach 2:
The system dynamically adjusts monitoring parameters based on configured power saving signaling. The UE modifies its monitoring behavior according to the received configuration, changing from continuous monitoring to selective monitoring at specific occasions, thereby optimizing both power consumption and reception reliability.
3Reliability
If the UE wakes up early to monitor PDCCH, then the signal reception reliability is improved, but the power consumption increases
Solution Approach 1:
The base station transmits power saving signaling before the DRX on-duration time to provide advance notice about necessary wake-ups. This allows the UE to wake up at the optimal moment - early enough to receive important signals but not earlier than necessary, minimizing unnecessary power consumption.
Solution Approach 2:
The wake-up timing is optimized locally for each UE based on its specific configuration and needs. The power saving signaling provides UE-specific instructions that allow each device to wake up at the precise moment needed for its reception requirements, rather than using a uniform early wake-up approach.
Data Source
AI summary
A method for a user equipment (UE) monitors a physical downlink control channel (PDCCH) for power saving signaling. The method includes receiving a discontinuous reception (DRX) configuration from a base station (BS) to configure the UE to monitor a scheduling signal on the PDCCH within a DRX active time for multiple transmit-receive points (TRP). Power saving signaling configurations are received from the BS to configure the UE to monitor power saving signaling on the PDCCH for the multiple TRPs, each power saving signaling configuration for a different TRP and comprising a time offset between a start of a nearest power saving signaling and a start of a DRX on-duration time. The PDCCH is monitored according to the power saving signaling configuration. The UE wakes up to monitor the PDCCH for the scheduling signal in the DRX active time according to the DRX configuration when receiving the power saving signaling.