XR CDRX Timing Adjustment for Power-Latency Balance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing power consumption and latency for extended reality (XR) devices, which require high-quality video and audio data with variable data packet sizes, while maintaining battery life and user comfort.
Innovation Solution
Adjusting the starting time and length of connected discontinuous reception (CDRX) and semi-persistent scheduling (SPS) occasions based on data flow variability, with acknowledgment (ACK) mechanisms to align communication periods with XR traffic patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CDRX on-duration is extended to improve communication quality for XR devices, then latency and throughput are improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the CDRX on-duration adjustable rather than fixed. The network can dynamically modify the on-duration parameters based on real-time XR traffic conditions, allowing the system to adapt between power-saving mode (shorter on-duration) and quality-assured mode (longer on-duration) as needed
Solution Approach 2:
The patent changes the parameter of CDRX on-duration by introducing adjustment indications that modify the starting time and/or length of the on-duration. This parameter change enables the system to align communication periods with XR data flow patterns, improving power efficiency while maintaining communication quality
2Use of energy by moving object
If CDRX on-duration is shortened to reduce power consumption, then battery life is extended, but communication latency increases
Solution Approach 1:
The system dynamically adjusts the CDRX on-duration based on traffic conditions. When XR data flows are predictable and can be scheduled efficiently, shorter on-durations reduce power consumption without significantly impacting latency. When data arrives unexpectedly, the system can extend the on-duration to ensure timely delivery
Solution Approach 2:
The patent uses preliminary scheduling information and adjustment indications to prepare for upcoming communications. By receiving advance information about data flow patterns, the system can pre-configure optimal CDRX parameters, reducing the need for reactive extensions that would increase latency
3Device complexity
If fixed CDRX scheduling is used to simplify implementation, then device complexity is reduced, but adaptability to variable data flow patterns deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where the network provides adjustment indications based on observed data flow patterns. The UE monitors actual traffic and compares it with scheduled expectations, using this feedback to trigger appropriate CDRX adjustments. This feedback loop enables adaptability while keeping the UE implementation relatively simple
Solution Approach 2:
The network acts as an intermediary that handles the complexity of adapting to variable data flows. Instead of requiring the UE to autonomously analyze and respond to complex traffic patterns, the network provides simplified adjustment indications that guide the UE's CDRX behavior, distributing the complexity management between network and device
Data Source
AI summary
Wireless communication devices, systems, and methods related to adjusting aspects of a connected discontinuous reception (CDRX) operation and/or a semi-persistent scheduling (SPS) operation for extended reality (XR) communications are provided. For example, a method of wireless communication performed by a user equipment can include receiving an adjustment indication indicating at least one of a starting time or a length of a connected discontinuous reception (CDRX) on-duration; transmitting an acknowledgment (ACK) associated with the adjustment indication; and monitoring, based on the at least one of the starting time or the length of the CDRX on-duration, for a communication.