XR Device C-DRX Configuration for Non-Integer Frame Rates
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Solution Overview
Problem
Current wireless communication systems face challenges in aligning XR frame rate modes with radio subframes due to non-integer frame rates, leading to mismatched packet reception frequencies and refresh rates, resulting in unnecessary delays and power consumption.
Innovation Solution
The proposed solution involves an XR device and a base station that exchange C-DRX configuration messages, allowing the XR device to select a C-DRX configuration sequence based on performance information, which includes power consumption and delay considerations, to optimize XR packet receptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the XR device uses a non-integer frame rate mode (e.g., 60 fps corresponding to 50/3 ms), then the XR application performance is improved, but the alignment with radio subframes becomes mismatched, causing unnecessary delays and power consumption
Solution Approach 1:
The patent segments the C-DRX configuration into multiple sequences, each corresponding to different frame rate modes. The XR device can select the appropriate sequence based on the current XR frame rate requirement, allowing independent optimization for each mode without affecting other configurations.
Solution Approach 2:
The patent introduces dynamic selection capability where the XR device can switch between different C-DRX configuration sequences based on the XR frame rate mode. This dynamic adaptation allows the system to optimize packet reception timing for each specific frame rate scenario.
2Loss of time
If the XR device frequently wakes up to receive packets to minimize delay, then the delay is reduced, but the power consumption increases
Solution Approach 1:
The patent changes the C-DRX configuration parameters (such as drx-OnDurationTimer, drx-InactivityTimer, drx-SlotOffset) based on the selected frame rate mode and performance information. This allows optimization of the balance between wake-up frequency and delay tolerance for each specific scenario.
Solution Approach 2:
The system uses performance information (including power consumption and delay metrics) as feedback to select the most appropriate C-DRX configuration sequence. This feedback mechanism enables the device to adapt its reception behavior based on current operational conditions.
3Device complexity
If the base station transmits packets according to fixed radio subframe timing, then the transmission scheduling is simplified, but the alignment with variable XR frame rates becomes difficult
Solution Approach 1:
The base station provides multiple segmented C-DRX configuration sequences, each optimized for specific frame rate modes. This segmentation allows the system to maintain simple fixed scheduling while providing specialized configurations for different XR requirements.
Solution Approach 2:
The C-DRX configuration mechanism is designed to be universal across different XR frame rate modes. By providing multiple sequences that can be selected based on the frame rate mode, the system achieves multi-functionality without requiring separate transmission scheduling mechanisms for each mode.
Data Source
AI summary
An extended reality (XR) device includes a transceiver and a processor. The transceiver is configured to perform wireless signal transmissions and receptions. The processor is configured to perform the following operations: receiving a connected-mode discontinuous reception (C-DRX) configuration message from a base station, in which the C-DRX configuration message corresponds to an XR frame rate mode and corresponds to C-DRX configuration sequences, the XR frame rate mode is in a unit of millisecond, and the XR frame rate mode is a non-integer frame rate mode; and selecting one of the C-DRX configuration sequences as a selected C-DRX configuration sequence of the XR device.