Uplink Positioning Reference Signal Configuration Reservation

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Solution Overview

Problem

In 5G NR, the frequent cell reselection by terminals in an RRC inactive state leads to increased power consumption and positioning delays due to the need for frequent interactions to reconfigure uplink positioning reference signals.

Innovation Solution

The LMF network element instructs network devices to reserve uplink positioning reference signal configurations, allowing terminals to continue using these configurations during cell reselection without repeated interactions, thereby reducing power consumption and delay.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If terminals frequently reselect cells in RRC inactive state, then mobility flexibility is improved, but power consumption increases and positioning delays occur due to frequent reconfiguration interactions

Engineering Contradiction:

Improvemobility flexibilityVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The network device performs preliminary action by reserving the uplink positioning reference signal configuration in advance before the terminal needs to reselect cells. This reservation ensures that when the terminal moves to a new cell, the positioning configuration is already prepared and can be applied immediately without requiring new configuration interactions, thus reducing power consumption while maintaining mobility flexibility.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces a configuration reservation mechanism as an intermediary between the terminal and the network device. This reservation mechanism acts as a mediator that maintains the positioning reference signal configuration across cell reselection events, allowing the terminal to move freely without triggering frequent reconfiguration interactions, thereby reducing power consumption.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If terminals frequently reselect cells in RRC inactive state, then mobility flexibility is improved, but positioning delays increase due to frequent reconfiguration interactions

Engineering Contradiction:

Improvemobility flexibilityVSAvoidpositioning delay

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The network device performs preliminary action by reserving the uplink positioning reference signal configuration in advance before the terminal needs to reselect cells. This reservation ensures that when the terminal moves to a new cell, the positioning configuration is already prepared and can be applied immediately without requiring new configuration interactions, thus reducing positioning delay while maintaining mobility flexibility.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Inventive Principle:

Principle #24Intermediary (Mediator)

3Measurement precision

If uplink positioning reference signal configuration is reconfigured with each cell reselection, then configuration accuracy is maintained, but network interaction frequency increases

Engineering Contradiction:

Improvepositioning accuracyVSAvoidnetwork interaction frequency

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The network device performs preliminary action by reserving the uplink positioning reference signal configuration in advance. This reservation maintains the configuration accuracy across cell reselection events without requiring frequent network interactions, as the reserved configuration remains valid and applicable in the new cell without needing reconfiguration.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces a configuration reservation mechanism as an intermediary that maintains positioning accuracy without increasing network interaction frequency. The reservation mechanism acts as a bridge that preserves the validity of the uplink positioning reference signal configuration across cell boundaries, eliminating the need for frequent reconfiguration interactions while maintaining positioning accuracy.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20250212159A1Methods and apparatuses for configuring uplink positioning reference signal, and devices and storage medium

Publication Date: 2025.06.26 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A method for configuring an uplink positioning reference signal (PRS), performed by a location management function (LMF) network element, includes: sending a first message to a first network device. The first message comprises an uplink positioning reference signal configuration, and the first message is configured to request the first network device to reserve the uplink positioning reference signal configuration.