XR Bandwidth Part Adaptation for Latency and Power
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing power consumption and latency for extended reality (XR) applications, particularly in scenarios where devices need to perform XR functions while maintaining battery life and avoiding overheating.
Innovation Solution
The proposed solution involves adapting the minimum control-channel-to-data-channel delay and bandwidth part (BWP) settings for wireless communication systems. This includes dynamically changing the K0 value, which represents the slot offset between scheduling DCI and the corresponding PDSCH, and adjusting the BWP bandwidth to optimize power efficiency and latency for XR applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the device continuously monitors control channels and maintains full bandwidth operation for XR applications, then the latency and reliability of XR data reception are improved, but the power consumption increases and battery life decreases
Solution Approach 1:
The patent applies dynamics by making the control channel monitoring adaptive rather than static. The UE dynamically adjusts its monitoring behavior based on received indications from the network, switching between different monitoring states (full monitoring, partial monitoring, or no monitoring) to balance latency requirements with power consumption constraints during XR application execution.
Solution Approach 2:
The patent changes the parameter of control channel monitoring intensity based on network-provided indications. The network signals the UE to adjust monitoring parameters (such as monitoring frequency, bandwidth, or specific time slots), allowing the system to optimize the trade-off between maintaining low latency for XR data and reducing power consumption during battery-operated XR sessions.
2Productivity
If the device operates at full bandwidth to ensure high data rates for XR content, then the throughput and quality of XR experience are improved, but the device generates excessive heat and risks overheating
Solution Approach 1:
The patent implements periodic action by having the UE alternate between full bandwidth operation and reduced bandwidth operation based on network indications. Instead of continuous full-power transmission, the device periodically adjusts its bandwidth utilization, receiving XR data in bursts at full bandwidth when needed and operating at lower bandwidth during intervals, thereby managing thermal accumulation while maintaining acceptable throughput for the XR application.
3Device complexity
If the network uses fixed scheduling intervals for XR data transmission, then the simplicity of scheduling and network management are improved, but the flexibility to adapt to varying XR traffic patterns and device conditions is reduced
Solution Approach 1:
The patent applies preliminary action by having the network pre-establish scheduling configurations and provide indications to the UE before actual XR data transmission begins. The network configures multiple scheduling options and transmission opportunities in advance, allowing the UE to select from pre-defined scheduling patterns based on real-time conditions, thus maintaining network management simplicity while enabling flexible adaptation to varying traffic demands and device states.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for scheduling and bandwidth part (BWP) adaptation for extended reality (XR). A method that may be performed by a user equipment (UE) includes obtaining an indication to change at least one of a minimum control-channel-to-data-channel delay or a bandwidth for receiving a first transmission on a BWP; changing the at least one of the minimum control-channel-to-data-channel delay to a new minimum control-channel-to-data-channel delay or the bandwidth on the BWP to a new bandwidth; and receiving the first transmission on the BWP using the at least one of the new minimum control-channel-to-data-channel delay or the new bandwidth of the BWP.