SRS Configuration Updating for UE Positioning Validity Recovery
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Solution Overview
Problem
In low power and high accuracy positioning (LPHAP) systems, the uplink sounding reference signal (SRS) configuration may become invalid when user equipment (UE) moves out of its valid area, preventing effective positioning.
Innovation Solution
The terminal initiates a radio resource control (RRC) connection resumption procedure and a random access channel (RACH) procedure to obtain a valid second target configuration, allowing it to update the SRS configuration when the first target configuration becomes invalid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the terminal uses a fixed SRS configuration for positioning, then positioning can be performed with low power consumption, but the configuration becomes invalid when the UE moves out of the valid area
Solution Approach 1:
The patent makes the SRS configuration dynamic by introducing validity area concepts and movement detection mechanisms. When the UE moves out of the valid area, the configuration can be updated or deactivated, allowing the system to adapt to changing positions while maintaining low power consumption when the configuration remains valid.
Solution Approach 2:
The patent changes the validity parameter of the SRS configuration based on the UE's position relative to the valid area. When the UE is within the valid area, the configuration remains active; when moved out, the configuration validity parameter changes, triggering updates or deactivation to maintain reliability.
2Measurement precision
If the terminal continuously monitors configuration validity and initiates RRC connection resumption when invalid, then positioning accuracy is maintained, but signaling overhead and processing complexity increase
Solution Approach 1:
The terminal autonomously monitors its own position relative to the SRS configuration valid area and self-determines when configuration updates are needed. This self-service mechanism reduces the need for continuous network-side monitoring and complex signaling, as the UE independently manages its configuration validity status.
Solution Approach 2:
The patent implements a feedback mechanism where the terminal reports its position or configuration validity status to the network side device. This feedback allows the network to update configurations only when necessary, balancing positioning accuracy with reduced signaling overhead compared to continuous monitoring.
Data Source
AI summary
This application discloses a configuration updating method, a configuration updating apparatus, a terminal, and a network-side device. The configuration updating method of embodiments of this application includes: initiating, by a terminal, when a first target configuration is invalid, a radio resource control RRC connection resumption procedure and a corresponding random access channel RACH procedure toward a first network-side device; and obtaining, by the terminal, a valid second target configuration based on the RRC connection resumption procedure and the RACH procedure.