UE PoSS Time Window Configuration for DRX Power Saving
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current communication systems, such as those using LTE, LTE-A, and NR, face challenges in efficiently managing power consumption during Discontinuous Reception (DRX) periods, particularly due to misaligned periodicities in Power Saving Signal (PoSS) monitoring and DRX configurations, which can lead to increased power consumption and reduced latency.
Innovation Solution
The proposed solution involves configuring a Power Saving Signal (PoSS) time window that precedes the DRX ON period, allowing the user equipment (UE) to determine whether to skip monitoring the Physical Downlink Control Channel (PDCCH) based on the PoSS configuration. This approach enables flexible power saving strategies suitable for various scenarios, including multi-beam operations and repetitions of the PoSS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE monitors PDCCH continuously during DRX ON period, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The network transmits PoSS in advance before the DRX ON period to indicate whether the UE should monitor PDCCH in the upcoming DRX ON period. This preliminary action allows the UE to skip unnecessary PDCCH monitoring while ensuring communication reliability when needed, thereby reducing power consumption without compromising reliability.
Solution Approach 2:
The PoSS mechanism provides feedback from the network to the UE about whether PDCCH monitoring should be performed in the next DRX ON period. This feedback enables the UE to adapt its monitoring behavior dynamically, monitoring only when necessary for maintaining communication reliability while saving power during periods when monitoring is not required.
2Device complexity
If the PoSS monitoring periodicity is misaligned with DRX configuration, then device complexity is reduced, but latency increases
Solution Approach 1:
The patent introduces dynamic parameters (offsetValue, windowLength) that allow the PoSS monitoring time window to be flexibly positioned and sized according to specific deployment scenarios. This dynamic configuration enables alignment between PoSS monitoring periodicity and DRX configuration, reducing latency while maintaining manageable device complexity through standardized parameter management.
Solution Approach 2:
The patent changes the monitoring behavior by introducing configurable parameters (offsetValue, windowLength) that define a specific time window for PoSS monitoring. By adjusting these parameters, the system can optimize the alignment between PoSS monitoring and DRX cycles, reducing latency without significantly increasing device complexity through the use of well-defined parameter sets.
3Use of energy by moving object
If the UE skips PDCCH monitoring during DRX ON period, then power consumption is reduced, but communication reliability deteriorates
Solution Approach 1:
The network sends PoSS in advance to indicate whether the UE should skip or monitor PDCCH in the upcoming DRX ON period. This preliminary indication allows the UE to confidently skip monitoring when safe to do so, reducing power consumption while maintaining communication reliability through the network's advance knowledge of scheduling intentions.
Solution Approach 2:
The PoSS provides feedback from the network to the UE about the necessity of PDCCH monitoring. This feedback mechanism ensures that the UE skips monitoring only when the network confirms it is safe to do so, thereby reducing power consumption without compromising communication reliability.
Data Source
AI summary
Provided is a user equipment (UE), a scheduling node, and communication methods for UE and, respectively, scheduling node. The UE comprises a transceiver which, in operation, receives a configuration of a PoSS, power saving signal, time window for monitoring a PoSS and preceding a DRX, discontinuous reception, ON period for monitoring a PDCCH, physical downlink control channel, wherein the POSS indicates whether or not the UE is allowed to skip monitoring for the PDCCH in the DRX ON period and circuitry which, in operation, determines, based on the configuration, the POSS time window, and controls the transceiver to perform monitoring for the POSS within the POSS time window.