Wake-Up Signal Resource Conflict Resolution in 5G DRX
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems, particularly in 5G NR, face challenges in managing wake-up signals to optimize power consumption and reduce unnecessary wake-ups during discontinuous reception (DRX) operations, leading to inefficiencies in resource allocation and potential collisions between wake-up signals and dedicated or system resources.
Innovation Solution
The implementation of a method that allows user equipment (UE) and base stations to identify conflicts between wake-up signals (WUS) and dedicated or system resources, enabling modifications such as puncturing or rate-matching to avoid collisions, thereby optimizing resource usage and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wake-up signals are transmitted frequently to ensure UEs wake up when necessary, then reliability of communication is improved, but power consumption increases and resource allocation efficiency deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting DRX cycle lengths, wake-up signal transmission timing, and resource allocation parameters based on UE activity patterns and network conditions. This allows the system to optimize between reliability and power consumption by adapting parameters rather than using fixed values.
Solution Approach 2:
The patent implements preliminary action through advance scheduling of wake-up signals and pre-configuration of DRX parameters. The network can predict when UEs will need to wake up and prepare resources accordingly, reducing unnecessary wake-ups while ensuring reliable communication when needed.
2Reliability
If wake-up signals are transmitted frequently to ensure UEs wake up when necessary, then reliability of communication is improved, but resource allocation efficiency deteriorates
Solution Approach 1:
The patent applies universality by designing wake-up signal resources that can serve multiple UEs simultaneously through group-based addressing and shared resource pools. This multi-functionality allows a single wake-up signal transmission to wake up multiple UEs, improving resource allocation efficiency while maintaining reliable communication.
Solution Approach 2:
The patent merges wake-up signal transmissions with other downlink communications by combining them in the same time-frequency resources when possible. This consolidation reduces the number of separate transmissions needed, improving resource allocation efficiency while ensuring UEs receive both wake-up signals and data reliably.
3Productivity
If wake-up signals share resources with other communications, then resource allocation efficiency is improved, but collision between wake-up signals and other resources occurs
Solution Approach 1:
The patent applies segmentation by dividing wake-up signal resources into separate groups and assigning different resource pools to different UE groups or service types. This segmentation reduces collisions by ensuring that critical wake-up signals have dedicated resources while less critical communications can share resources more aggressively.
Solution Approach 2:
The patent introduces an intermediary scheduling mechanism that mediates between wake-up signal transmissions and other communications. The scheduler acts as an intermediary to allocate resources, resolving conflicts before they occur and ensuring that wake-up signals receive appropriate priority while maximizing overall resource utilization.
Data Source
Figure 1
Figure 2A~2D
Figure 3
AI summary
A user equipment (UE) identifies a conflict between a system resource and a wake-up signal (WUS) resource associated with the UE while the UE is operating based on discontinuous reception (DRX). The UE modifies DRX operation in response to identifying the conflict between the system resource and the WUS resource. A base station identifies a conflict between a system resource and a WUS resource for a UE operating based on DRX. The base station modifies a transmission to the UE in response to identifying the conflict between the system resource and the WUS resource.