Uplink Positioning Stop Signaling for 5G NR Base Stations

Solution Overview

Problem

In the 5G NR system, when a terminal in the RRC_INACTIVE state moves to another cell or the TA timer times out, the uplink positioning reference signal is stopped, leading to unnecessary measurement by base stations, wasting uplink resources and causing additional energy consumption.

Innovation Solution

A method where the serving base station detects the terminal's stop in sending the uplink positioning reference signal and sends a notification to release SRS resources, informing other base stations to stop measuring, thereby avoiding resource waste and energy consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the base station continues to measure the uplink positioning reference signal after the terminal stops sending it, then the positioning function is maintained, but uplink resources are wasted and energy consumption increases

Engineering Contradiction:

Improvepositioning functionVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The serving base station monitors whether the terminal is sending uplink positioning reference signals and provides feedback information to neighboring base stations. When the terminal stops sending signals (due to cell movement or TA timer timeout), the serving base station notifies neighboring base stations to stop measurement, thereby avoiding wasted energy and resources while maintaining positioning reliability when needed

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs preliminary monitoring of terminal signal transmission status and takes preliminary action by notifying neighboring base stations before unnecessary measurement continues. This prevents energy waste in advance while ensuring positioning functions are maintained when terminals are actively transmitting

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the base station continues to measure the uplink positioning reference signal after the terminal stops sending it, then the positioning function is maintained, but uplink resources are wasted

Engineering Contradiction:

Improvepositioning functionVSAvoiduplink resources

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The serving base station monitors whether the terminal is sending uplink positioning reference signals and provides feedback information to neighboring base stations. When the terminal stops sending signals (due to cell movement or TA timer timeout), the serving base station notifies neighboring base stations to stop measurement, thereby avoiding wasted energy and resources while maintaining positioning reliability when needed

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs preliminary monitoring of terminal signal transmission status and takes preliminary action by notifying neighboring base stations before unnecessary measurement continues. This prevents energy waste in advance while ensuring positioning functions are maintained when terminals are actively transmitting

Inventive Principle:

Principle #10Preliminary action

3Loss of energy

If the network device sends notification information to stop positioning, then unnecessary measurement is reduced, but network signaling overhead increases

Engineering Contradiction:

Improveenergy consumptionVSAvoidnetwork signaling

Core Design Contradiction:

Loss of energyVSDevice complexity

Solution Approach 1:

The serving base station monitors whether the terminal is sending uplink positioning reference signals and provides feedback information to neighboring base stations. When the terminal stops sending signals (due to cell movement or TA timer timeout), the serving base station notifies neighboring base stations to stop measurement, thereby avoiding wasted energy and resources while maintaining positioning reliability when needed

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The network devices autonomously monitor terminal signal status and automatically trigger notification mechanisms without requiring external control. The serving base station self-determines when the terminal stops sending signals and proactively notifies neighboring base stations, reducing the need for complex centralized control while minimizing energy waste

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20250365694A1Method and apparatus for stopping positioning terminal, device and storage medium

Publication Date: 2025.11.27 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A method and an apparatus for stopping positioning a terminal, a device and a storage medium are provided. The method includes: sending notification information to a second network device in case that the first network device determines that the terminal stops sending an uplink positioning reference signal. The notification information is configured to enable the second network device to decide to stop positioning the terminal.