Terminal RRM Measurement via Power Saving Signal

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Solution Overview

Problem

The introduction of the 'power saving signal' in 5G communications systems reduces the active time of terminals, thereby reducing opportunities and accuracy of Radio Resource Management (RRM) measurements.

Innovation Solution

A communication method that determines, based on the receiving status of a power saving signal, whether to perform RRM measurements on a Channel State Information Reference Signal (CSI-RS) within a specific time period within a Discontinuous Reception (DRX) cycle, ensuring sufficient measurement opportunities and accuracy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If a power saving signal is introduced to indicate terminal sleep state, then energy consumption is reduced, but RRM measurement opportunities and accuracy are reduced

Engineering Contradiction:

Improveterminal energy consumptionVSAvoidRRM measurement accuracy

Core Design Contradiction:

Use of energy by moving objectVSMeasurement precision

Solution Approach 1:

The patent segments the DRX cycle into distinct time periods: a first time period for RRM measurement and a second time period for normal operation. This segmentation allows the terminal to perform measurements during the first time period while maintaining power saving during the second time period, thus resolving the contradiction between measurement accuracy and energy consumption.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements preliminary action by performing RRM measurements during the first time period before the terminal enters the sleep state indicated by the power saving signal. This ensures that measurements are completed in advance, maintaining measurement accuracy while enabling subsequent power saving operation.

Inventive Principle:

Principle #10Preliminary action

2Use of energy by moving object

If power saving signal reduces active time, then energy consumption is reduced, but mobility measurement capability is degraded

Engineering Contradiction:

Improveterminal energy consumptionVSAvoidmobility measurement capability

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent divides the operational cycle into a measurement-oriented first time period and a power-saving second time period within the DRX cycle. This segmentation ensures that mobility measurements are reliably performed during the first time period while the terminal can enter sleep state during the second time period, maintaining both reliability and energy efficiency.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The terminal performs RRM measurements for mobility management during the first time period before entering the power-saving state. This preliminary action ensures that mobility measurement capability is maintained through advance measurement completion, allowing the terminal to rely on these measurements even when in sleep state.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250133627A1Communication method and communications apparatus

Publication Date: 2025.04.24 HUAWEI TECH CO LTD

AI summary

The present disclosure relates to communication method and a communications apparatus. One example method includes determining, based on a receiving status of a first power saving signal, that a physical downlink control channel (PDCCH) is not detected within a first discontinuous reception (DRX) cycle; and performing, in a first time period within the first DRX cycle, radio resource management (RRM) measurement on a channel state information reference signal (CSI-RS) sent by a network device.