Uplink Synchronization Detection for Idle-State 5G Positioning
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Solution Overview
Problem
In the 5G era, uplink synchronization between terminals and base stations in IDLE or INACTIVE states is challenging, leading to unreliable transmission of SRS and positioning failures due to the lack of network connection, which affects positioning accuracy and efficiency.
Innovation Solution
A synchronization state processing method and device that allows terminals and base stations to determine uplink synchronization status by obtaining channel state information, such as path loss, RSRP, and RSRP variation, and take corrective actions like re-establishing synchronization or generating failure indications to ensure continued positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If IDLE-state or INACTIVE-state positioning is used to reduce power consumption, then device power consumption is reduced, but uplink synchronization cannot be maintained and positioning reliability deteriorates
Solution Approach 1:
The base station performs preliminary actions by pre-configuring the terminal with SRS transmission parameters, channel state information thresholds, and synchronization detection mechanisms before the terminal enters IDLE or INACTIVE state. This allows the terminal to autonomously detect uplink out-of-synchronization conditions and report them without needing active network connection, thus maintaining positioning reliability while reducing power consumption.
Solution Approach 2:
The patent introduces an intermediary mechanism where the terminal autonomously detects uplink synchronization status using pre-configured thresholds and reports findings to the base station. This intermediary detection system bridges the gap between power-saving IDLE/INACTIVE states and positioning reliability requirements, allowing the system to maintain accuracy without continuous network connection.
2Measurement precision
If network connection is established to maintain uplink synchronization, then positioning accuracy is improved, but device power consumption increases
Solution Approach 1:
Instead of maintaining full network connection for synchronization, the patent applies partial action by enabling the terminal to perform limited autonomous synchronization detection using pre-configured parameters. The terminal only activates synchronization detection and reporting functions when needed, rather than maintaining continuous connection, thus achieving adequate positioning accuracy with reduced power consumption.
Solution Approach 2:
The patent implements periodic action by having the terminal perform synchronization detection at specific intervals or triggered events rather than continuously. The terminal uses pre-configured channel state information thresholds to periodically assess uplink synchronization status and reports only when synchronization degradation is detected, reducing power consumption while maintaining positioning accuracy.
3Reliability
If continuous network connection is maintained for synchronization monitoring, then uplink synchronization reliability is improved, but network efficiency deteriorates
Solution Approach 1:
The patent extracts the essential synchronization detection function from the continuous network connection requirement. By configuring the terminal with necessary detection parameters and thresholds beforehand, the system separates synchronization monitoring from active network connection, allowing terminals to autonomously monitor and report synchronization status without occupying network resources continuously, thus improving network efficiency while maintaining reliability.
4Ease of operation
If uplink out-of-synchronization is not detected, then device operation is simplified, but positioning accuracy deteriorates
Solution Approach 1:
The patent implements self-service by enabling the terminal to autonomously detect uplink out-of-synchronization conditions using pre-configured channel state information thresholds. The terminal independently assesses synchronization status based on received channel state information and automatically reports when degradation is detected, eliminating the need for complex network-side monitoring while maintaining positioning accuracy through automated terminal-side detection.
Data Source
AI summary
The present disclosure relates to the field of communications. Disclosed are a synchronization state processing method, and a device and a storage medium. The method comprises: during the process of a terminal in an idle state or an inactive state transmitting an SRS to a base station for uplink positioning, the terminal or the base station acquires channel state information of a transmission channel between the terminal and the base station, and detecting, on the basis of the channel state information, a synchronization state between the terminal, which is performing idle-state or inactive-state uplink positioning, and the base station; and when uplink out-of-synchronization is detected, the terminal or the base station uses a corresponding processing approach to continue to guarantee the subsequent idle/inactive positioning process flow.