Wake-Up Signal Monitoring for DRX Group Power Optimization
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in power and resource management due to the need for user equipment (UE) to continuously monitor for wake-up signals across multiple discontinuous reception (DRX) groups, especially when data is buffered for only one group, leading to unnecessary power consumption and resource usage.
Innovation Solution
The method involves a UE selectively monitoring a cell of a first DRX group for a wake-up signal (WUS) and starting a DRX on duration timer for a second DRX group only if the second group has a DRX on duration occasion during the first group's cycle, based on configuration and presence of buffered data, thereby optimizing power and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE continuously monitors for wake-up signals across multiple DRX groups, then the reliability of receiving data is improved, but the power consumption and resource usage increase
Solution Approach 1:
The patent segments the monitoring process by introducing a wake-up signal mechanism that divides monitoring into two stages: a low-power stage where the UE monitors only for wake-up signals, and a full monitoring stage activated only when the wake-up signal indicates data presence. This segmentation allows the UE to avoid continuous full monitoring while maintaining reliable data reception.
Solution Approach 2:
The base station performs preliminary action by sending a wake-up signal before actual data transmission. This preliminary signal informs the UE in advance whether data is buffered for it in the DRX group, allowing the UE to prepare appropriately and avoid unnecessary full monitoring when no data is present.
2Reliability
If the UE monitors all DRX groups for wake-up signals, then no data is missed, but unnecessary resource usage occurs when data is buffered for only one group
Solution Approach 1:
The patent extracts the essential function of data notification from the full monitoring process. Instead of requiring the UE to monitor all DRX groups for all types of signals, the system extracts the wake-up signal function that specifically indicates data presence, allowing the UE to take out only the necessary monitoring action and avoid wasting resources on monitoring groups without data.
3Reliability
If the UE activates DRX on duration timer for all DRX groups upon receiving WUS, then all potential data is received, but power consumption increases unnecessarily
Solution Approach 1:
The patent applies local quality by making the DRX on duration timer activation specific to individual DRX groups based on data presence. Instead of a uniform activation across all groups, the UE activates the timer only for the specific DRX group where the wake-up signal indicates data is buffered, applying different monitoring quality to different groups based on local conditions.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may selectively monitor, based at least in part on a configuration of the UE, a cell of a first discontinuous reception (DRX) group for a wake-up signal (WUS); and selectively start, during a DRX cycle of the first DRX group associated with the WUS, a DRX on duration timer for a second DRX group based at least in part on the WUS and whether the second DRX group has a DRX on duration occasion during the DRX cycle of the first DRX group. Numerous other aspects are provided.