Aligning CDRX and SC-PTM DRX Schedules for UE Power Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in LTE, face inefficiencies in power management due to misaligned Connected Mode Discontinuous Reception (CDRX) and Single Cell Point-To-Multipoint (SC-PTM) Discontinuous Reception (DRX) schedules, leading to unnecessary battery consumption and resource wastage in user equipment (UE).
Innovation Solution
A method where a base station configures a CDRX schedule to be time-aligned with an SC-PTM DRX schedule, ensuring that the CDRX on duration coincides or occurs within a threshold time period of the SC-PTM DRX on duration, thereby reducing the frequency of UE wake-ups and conserving battery power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If CDRX and SC-PTM DRX schedules are configured independently without alignment, then each schedule can operate autonomously with its own timing, but the UE must wake up multiple times to monitor both schedules, increasing power consumption
Solution Approach 1:
The patent merges the CDRX schedule and SC-PTM DRX schedule by aligning their on-duration timing. The base station configures the CDRX on-duration to coincide with or occur within a threshold time period of the SC-PTM DRX on-duration, allowing the UE to monitor both schedules during a single wake-up period rather than requiring separate wake-ups for each schedule.
Solution Approach 2:
The patent changes the timing parameters of the CDRX schedule to match the SC-PTM DRX schedule parameters. Specifically, the base station adjusts the CDRX on-duration timing and duration based on the SC-PTM DRX on-duration parameters, creating a synchronized operation that reduces UE power consumption while maintaining proper schedule configuration.
2Reliability
If the UE wakes up frequently to monitor both CDRX and SC-PTM schedules separately, then communication reliability is maintained, but battery power is wasted due to unnecessary wake-ups
Solution Approach 1:
The patent combines the monitoring of CDRX and SC-PTM schedules into a single wake-up event by aligning their on-durations. This ensures that the UE monitors both schedules during one wake-up period, maintaining communication reliability for both services while eliminating the energy waste associated with multiple separate wake-ups.
Solution Approach 2:
The base station performs preliminary configuration of the CDRX schedule parameters based on the SC-PTM DRX schedule before the UE begins operation. By pre-aligning the timing parameters, the system ensures that the UE will naturally wake up at the same time for both schedules without requiring additional wake-up commands or complex runtime coordination.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may receive a temporary mobile group identifier (TMGI) for a single cell point-to-multipoint (SC-PTM) service to which a user equipment (UE) is to be subscribed. The apparatus may configure a connected mode discontinuous reception (CDRX) schedule for the UE based at least in part on an SC-PTM discontinuous reception (DRX) schedule that corresponds to the TMGI. The apparatus may transmit the CDRX schedule to the UE.