Predictive DRX Bypass for Sub-Millisecond Latency in 5G
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Solution Overview
Problem
Current discontinuous reception (DRX) mechanisms in wireless networks, such as 5G NR, lead to latency and jitter issues due to the time it takes for devices to cycle back on, which is not synchronized with network slice operations, affecting ultra-low latency applications.
Innovation Solution
The predictive discontinuous reception bypass service suspends or bypasses DRX for network slices, enabling immediate grant requests and synchronization through a predictive scheduler, using control plane messages like Zadoff-Chu signals to maintain transceiver activity even in DRX mode, allowing for sub-millisecond latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If discontinuous reception (DRX) mechanism is used to reduce power consumption, then energy efficiency is improved, but latency and jitter increase due to device cycling time
Solution Approach 1:
The network side performs preliminary actions by predicting when data will be available and proactively waking up the device before data arrival. The predictive scheduler estimates data arrival times and triggers device wake-up in advance, eliminating the waiting period that causes latency while maintaining DRX power-saving benefits during idle periods.
Solution Approach 2:
A predictive scheduler acts as an intermediary between the network side and the end device. It coordinates the device's DRX cycles with network data scheduling, translating network data availability predictions into appropriate device wake-up timing, thereby synchronizing communication without requiring continuous device monitoring.
2Duration of action of moving object
If DRX cycling is implemented to extend battery life, then device autonomy is improved, but synchronization with network slice operations deteriorates
Solution Approach 1:
The system implements feedback mechanisms where the predictive scheduler continuously monitors data arrival patterns and adjusts device wake-up timing accordingly. The network side provides feedback about data availability predictions, and the device adjusts its DRX wake-up cycles to match, maintaining synchronization while preserving battery life through optimized cycling.
Solution Approach 2:
The DRX configuration becomes dynamic rather than static. The predictive scheduler adjusts wake-up intervals and timing based on real-time data arrival predictions and network conditions, allowing the system to adapt DRX parameters to match actual communication patterns and maintain synchronization reliability.
Data Source
AI summary
A method, a device, and a non-transitory computer-readable storage medium are described in which an predictive discontinuous reception (DRX) bypass service is provided. The bypass service may provide flow control signaling that enables an uplink grant to be transmitted to an end device regardless of the DRX mode. The bypass service may provide for an immediate grant for uplink data and may improve latency. The bypass service may also provide flow control signaling for downlink data that may cause the end device to wake up from a DRX mode and receive downlink data. The bypass service also provides predictive scheduling that allows an external network, such as a multi-access edge computing network to establish a DRX-free downlink connection before completion of data processing. The flow control signaling may include a quality of service flow identifier value that correlates to the bypass service.