DRX Wake-Up Signal Offset Control for Low-Latency Reception
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a need for a mechanism to dynamically control the time offset between a wake-up signal detection window and a subsequent communication window in DRX cycles to optimize power consumption and reduce latency in wireless communication systems, particularly in 5G networks.
Innovation Solution
A method is provided for determining the time offset between a wake-up signal detection window and a subsequent communication window based on predetermined rules dependent on downlink signal characteristics, such as DRX configuration, bandwidth, and potential BWP switching, allowing for dynamic adjustment of the offset to ensure efficient power management and reduced latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the time offset between wake-up signal detection window and DRX ON window is increased to ensure sufficient preparation time for decoding PDCCH/PDSCH, then reliability of signal reception is improved, but latency increases and power consumption increases due to extended active time
Solution Approach 1:
The patent applies dynamics by making the time offset (PS_offset) configurable and adaptable rather than fixed. The network can dynamically adjust the offset value based on terminal capability, BWP configuration, and traffic conditions, allowing the system to optimize between reliability and latency requirements in different scenarios
Solution Approach 2:
The patent changes the parameter PS_offset from a static value to a configurable parameter that can be adjusted based on terminal capabilities, BWP switching requirements, and network conditions. This allows the system to modify the time offset to achieve optimal balance between preparation time needs and latency reduction goals
2Manufacturing precision
If the time offset is increased to ensure sufficient preparation time for receiver activation and decoding operations, then manufacturing precision of signal processing is improved, but use of energy increases due to extended active reception period
Solution Approach 1:
The patent makes the time offset dynamic and configurable, allowing the network to adjust PS_offset based on terminal capability information and current operational conditions. This enables the system to use minimal preparation time when possible, reducing power consumption while maintaining sufficient signal processing precision when needed
Solution Approach 2:
The patent changes PS_offset from a fixed parameter to a configurable one that can be adapted based on terminal capabilities, BWP configurations, and traffic patterns. This allows optimization of power consumption by minimizing the active reception period while ensuring adequate preparation time for signal processing operations
3Productivity
If the time offset is decreased to reduce latency and power consumption, then productivity is improved, but reliability deteriorates due to insufficient preparation time for decoding operations
Solution Approach 1:
The patent applies dynamics by enabling flexible configuration of the time offset based on terminal capabilities and network conditions. This allows the system to reduce latency when terminal capabilities permit fast decoding, while maintaining reliability by increasing the offset when needed for proper signal processing preparation
Solution Approach 2:
The patent changes PS_offset to a configurable parameter that can be adjusted according to terminal capability reports, BWP switching requirements, and network conditions. This enables optimization of communication efficiency by minimizing unnecessary delay while ensuring sufficient preparation time for reliable signal reception and decoding
4Device complexity
If a fixed time offset is used for all terminals and scenarios, then device complexity is reduced, but adaptability deteriorates as the offset cannot be optimized for different terminal capabilities and BWP configurations
Solution Approach 1:
The patent makes the offset configuration dynamic and adaptable through network-configurable parameters. The network can adjust PS_offset based on terminal capability information and BWP configurations, providing adaptability without requiring complex terminal-side calculations or multiple fixed offset modes
Solution Approach 2:
The patent changes the offset from a fixed constant to a configurable parameter that can be adapted to different terminal capabilities, BWP configurations, and network conditions. This provides versatility in offset selection while maintaining relatively simple implementation through network-side configuration rather than complex terminal-side decision logic
Data Source
AI summary
A method for controlling a terminal to receive signaling from a wireless network during discontinuous reception, DRX, the method being carried out in the terminal and comprising determining (604) a time offset (ΔTO) between a first window (41) for monitoring a wake-up signal, WUS, occasion and a subsequent second window (42) for monitoring signal reception responsive to receiving a WUS in the first window, wherein said time offset is dependent on a characteristic (62) associated with a downlink signal from the wireless network in accordance with a predetermined rule.