Early Connected Discontinuous Reception for Wireless UE
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Solution Overview
Problem
Current wireless communication systems face challenges in optimizing discontinuous reception (DRX) cycles to balance battery power conservation and latency, particularly in scenarios with varying scheduling rates and data transmission frequencies.
Innovation Solution
Implementing early connected discontinuous reception (CDRX) by configuring user equipment (UE) to transition to a CDRX cycle based on specific conditions, including an early inactivity timer and a condition related to the timing of the next on duration, allowing for earlier entry into a sleep state while controlling maximum latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the UE waits for the CDRX inactivity timer to expire before entering sleep state, then latency is reduced and communication responsiveness is improved, but battery power consumption increases
Solution Approach 1:
The UE performs preliminary assessment of communication activity patterns and proactively enters CDRX cycle before the inactivity timer expires. By predicting inactivity based on current communication patterns and scheduling rate information, the UE transitions to sleep state in advance, achieving both power savings and acceptable latency performance.
Solution Approach 2:
The system dynamically adjusts the timing of CDRX cycle entry based on real-time scheduling rate information and communication activity patterns. Rather than using a fixed timer expiration rule, the UE adapts its transition timing to balance power consumption and latency requirements according to current network conditions.
2Use of energy by moving object
If the UE enters CDRX cycle earlier to save more battery power, then energy consumption is reduced, but latency increases and communication responsiveness deteriorates
Solution Approach 1:
The UE utilizes feedback from scheduling rate information and communication activity monitoring to determine the optimal timing for entering CDRX cycle. By continuously monitoring communication patterns and using this feedback to adjust entry timing, the system achieves power savings while maintaining acceptable latency performance.
Solution Approach 2:
The system changes the timing parameter for CDRX cycle entry from a fixed timer expiration point to a dynamically determined point based on scheduling rate information and communication activity patterns. This parameter adjustment allows optimization of both power consumption and latency according to actual network conditions.
3Reliability
If the UE maintains continuous monitoring to ensure immediate response to incoming data, then communication reliability is improved, but battery power consumption increases
Solution Approach 1:
The UE performs preliminary monitoring of communication activity patterns and scheduling rate information before entering CDRX cycle. This preliminary assessment ensures that the UE can reliably determine when it is safe to enter sleep state without missing important communications, thereby maintaining communication reliability while reducing power consumption.
Solution Approach 2:
The UE autonomously monitors its own communication activity patterns and scheduling rate information to make informed decisions about when to enter CDRX cycle. By self-managing the transition timing based on its own communication needs, the UE achieves power savings while maintaining reliable communication response.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration for connected discontinuous reception (CDRX), the configuration indicating a first condition associated with a first CDRX parameter and a second condition associated with a second CDRX parameter. The UE may transition to a CDRX cycle when the first condition and the second condition are satisfied prior to an expiration of a CDRX inactivity timer. Numerous other aspects are described.