Feature-Aware Wake-Up Signals for Targeted System Information
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently communicating system information due to resource and overhead issues, particularly when not all UEs require periodic updates, and associating different random access configurations with different sets of applicable features leads to large system information sizes.
Innovation Solution
Implementing an on-demand system information communication mechanism using a wake-up signal (WUS) that requests specific system information only when needed, reducing the amount of information carried by indicating applicable features of the UE, and associating random access configurations with WUS preambles and time periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If periodic system information updates are sent to all UEs, then all UEs receive necessary system information, but communication resources and overhead increase significantly
Solution Approach 1:
The patent extracts the wake-up signal (WUS) mechanism from the traditional periodic system information broadcast, allowing the network to send a compact indication signal to specific UEs that need system information updates, rather than broadcasting to all UEs. This extraction reduces communication overhead while ensuring targeted delivery of system information to only those UEs that require it.
Solution Approach 2:
The patent enables UEs to self-identify their need for system information updates through the WUS mechanism. When a UE needs system information, it can indicate this need through the WUS procedure, and the network responds by providing the specific information required. This self-service approach eliminates the need for the network to broadcast to all UEs, reducing overall communication resources consumed.
2Adaptability or versatility
If system information includes all random access configurations for different features, then all UE feature requirements are met, but system information size becomes large
Solution Approach 1:
The patent segments the random access configuration information into multiple parts: (1) a first set of random access configurations for a first feature, and (2) a second set of random access configurations for a second feature. This segmentation allows the system information to be structured in a way that provides comprehensive feature coverage while managing information size through organized division of configurations.
Solution Approach 2:
The patent applies local quality by providing different random access configurations tailored to specific UE features. Instead of providing a single comprehensive configuration that covers all possible features, the system provides localized configurations for specific features (first feature, second feature), allowing each UE to receive only the configurations relevant to its specific capabilities, thus reducing overall information size while maintaining adaptability.
Data Source
AI summary
Certain aspects of the present disclosure provide techniques for wireless communications by an apparatus. A method includes sending a wake up signal (WUS), the WUS comprising: an indication of one or more applicable features of the apparatus, the one or more applicable features associated with random access configuration; and an indication of a request for system information; and receiving, after the WUS is sent, the system information.