Logged MDT Frequency Selection for Low-Overhead 5G Coverage Evaluation

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Solution Overview

Problem

Evaluating network quality in 5G communications systems is challenging, particularly in terms of identifying weak coverage, overshoot coverage, and coverage holes, and existing methods lead to high energy and signaling overheads for terminal devices.

Innovation Solution

Implementing targeted logged MDT measurements for specific frequencies or network types, reducing the need for measurements on other frequencies or types, thereby minimizing energy and signaling overheads.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If logged MDT measurement is performed for all frequencies, then network quality evaluation coverage is improved, but energy consumption overhead increases

Engineering Contradiction:

Improvenetwork quality evaluation coverageVSAvoidenergy consumption overhead

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent segments the measurement task by dividing frequencies into target frequencies (requiring logged MDT measurement) and non-target frequencies (exempt from measurement). This segmentation is achieved through configuration information that specifies which frequencies should be measured, allowing the terminal device to focus resources only on relevant frequencies while maintaining comprehensive network quality evaluation coverage.

Inventive Principle:

Principle #1Segmentation

2Measurement precision

If logged MDT measurement is performed for all network types, then network quality evaluation comprehensiveness is improved, but energy consumption overhead increases

Engineering Contradiction:

Improvenetwork quality evaluation comprehensivenessVSAvoidenergy consumption overhead

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent segments the measurement task by network type, configuring the terminal device to perform logged MDT measurement only for specific target network types (e.g., 5G NR, LTE) while excluding other network types. This segmentation allows comprehensive evaluation of relevant network types without the energy overhead of measuring all possible network types.

Inventive Principle:

Principle #1Segmentation

3Loss of information

If measurement reports for all frequencies are transmitted, then network quality information completeness is improved, but air interface signaling overhead increases

Engineering Contradiction:

Improvenetwork quality information completenessVSAvoidair interface signaling overhead

Core Design Contradiction:

Loss of informationVSQuantity of substance

Solution Approach 1:

The patent extracts and transmits only the measurement reports for target frequencies to the network device, excluding measurement reports for non-target frequencies. This extraction approach ensures that complete network quality information for relevant frequencies is provided to the network while minimizing air interface signaling overhead by omitting unnecessary measurement data.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS20250350974A1Communication method and communications apparatus

Publication Date: 2025.11.13 HUAWEI TECH CO LTD

AI summary

The present disclosure relates to communication methods and communications apparatus. In one example communication method, a terminal device obtains measurement configuration information, where the measurement configuration information is used to indicate a target frequency for which logged minimization of drive tests (logged MDT) measurement is performed by the terminal device. The terminal device performs the logged MDT measurement for the target frequency.