ULP Receiver System Information Acquisition
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently and energy-effectively updating system information in wireless transmit/receive units (WTRUs), particularly in idle or inactive states, due to limitations in power consumption and data rate capabilities of traditional receivers.
Innovation Solution
The implementation of an ultra-low power (ULP) receiver within WTRUs, which uses signature-based index signaling and incremental updates to acquire and update system information, allowing for energy-efficient and latency-efficient system information acquisition and updates, even in idle/inactive states, by leveraging ULP receivers for incremental SI updates and on-demand signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional receivers are used to acquire and update system information, then system information can be acquired, but power consumption is high and battery life is reduced
Solution Approach 1:
The system information is segmented into a baseline configuration and incremental updates. The WTRU receives the baseline configuration once and then only needs to receive incremental update indicators, significantly reducing the power consumption while maintaining reliable system information acquisition.
Solution Approach 2:
The baseline configuration is received and stored in advance. This preliminary action allows the WTRU to operate with a complete system information set initially, and then only needs to apply small incremental updates later, reducing the need for continuous high-power receiver operation.
2Productivity
If traditional receivers continuously monitor for system information updates, then updates can be detected, but data rate requirements and power consumption increase
Solution Approach 1:
The update indicator is extracted as a separate, minimal signaling element from the full system information. This allows the WTRU to monitor only for this small indicator using low-power reception, and only activate the full receiver when an update is actually detected, improving efficiency while reducing power consumption.
Solution Approach 2:
The WTRU performs partial monitoring by only listening for update indicators rather than continuously receiving full system information. This partial action is sufficient to detect updates while avoiding the excessive power consumption of continuous full-information reception.
3Loss of time
If on-demand system information requests are used, then system information can be updated, but additional signaling overhead and latency are introduced
Solution Approach 1:
The network performs periodic system information updates and transmits update indicators at regular intervals. This periodic action eliminates the need for on-demand requests, reducing both latency and signaling complexity while ensuring timely delivery of system information updates.
Solution Approach 2:
An update indicator serves as an intermediary signal between the network and WTRU. Instead of direct on-demand requests or continuous full-information transmission, this intermediary indicator efficiently bridges the communication, reducing latency and simplifying the signaling process.
Data Source
AI summary
A WTRU may receive an indication of a set of baseline configurations (e.g., the set of baseline configurations or a pointer/index to the set of baseline configurations). The set of baseline configurations may include at least a first baseline configuration and a second baseline configuration. The WTRU may receive first information (e.g., a first signature), wherein the first information indicates that the first baseline configuration is a selected baseline configuration (e.g., a current SI baseline). The first information may be received via the low power receiver. The WTRU may receive and/or determine scheduling information. The scheduling information may include at least an indication of a first schedule associated with first update information. The WTRU may receive, in accordance with the first schedule, second information (e.g., a second signature). The second information may indicate the first update information (e.g., the first update information indicating an update to the selected baseline configuration).