High-Speed UE RRM Measurement Timing Before eDRX Paging

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Solution Overview

Problem

In high-speed scenarios, such as high-speed railways, the power consumption of user equipment (UE) for radio resource management (RRM) measurements is excessively high due to frequent cell handovers, leading to reduced standby time, especially for lightweight devices with fewer antennas.

Innovation Solution

The UE is provided with indication information to perform a first type of RRM measurement behavior, which includes starting intra-frequency cell measurements before an extended discontinuous reception (eDRX) cycle arrives and receiving paging when the eDRX cycle arrives, thereby reducing power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the UE performs intensive RRM measurement at the cell edge to ensure measurement accuracy, then the measurement precision is improved, but the power consumption increases

Engineering Contradiction:

ImproveRRM measurement accuracyVSAvoidUE power consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The network performs RRM measurement configuration and indication actions in advance before the UE actually performs measurements. The network configures measurement parameters, sets measurement triggers, and provides measurement indications to the UE beforehand, allowing the UE to perform measurements only when necessary rather than continuously, thus reducing power consumption while maintaining measurement accuracy when needed

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The network dynamically adjusts RRM measurement parameters such as measurement frequency, measurement bandwidth, and measurement timing based on UE conditions (e.g., whether the UE is in a high-speed scenario). By changing these parameters adaptively, the system ensures measurement accuracy is maintained when required while reducing measurement intensity and power consumption during normal conditions

Inventive Principle:

Principle #35Parameter changes

2Measurement precision

If the UE increases the quantity of samples at the physical layer to ensure measurement accuracy for wearable devices, then the measurement precision is improved, but the power consumption further increases

Engineering Contradiction:

Improvemeasurement accuracy performanceVSAvoidwearable device power consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The network configures different physical layer measurement parameters specifically for wearable devices, including adjusted sample quantities, measurement bandwidths, and timing configurations. These parameters are optimized to achieve sufficient measurement accuracy for wearable devices' specific requirements without unnecessarily increasing power consumption, recognizing that wearable devices have different performance characteristics compared to normal handheld terminals

Inventive Principle:

Principle #35Parameter changes

3Reliability

If the UE performs RRM measurement frequently in high-speed scenario to handle fast cell handover, then the reliability is improved, but the power consumption increases

Engineering Contradiction:

Improvecell handover reliabilityVSAvoidUE power consumption in high-speed scenario

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system dynamically adapts RRM measurement behavior based on the UE's movement scenario. When the network detects or is informed that a UE is in a high-speed scenario (such as high-speed railway), it configures appropriate measurement parameters and triggers that balance the need for reliable cell handover with reduced power consumption. The measurement frequency and intensity are adjusted dynamically according to the scenario rather than using a fixed approach

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The network changes RRM measurement parameters specifically for high-speed scenarios, including adjusting measurement timing, frequency, and trigger conditions. These parameter changes ensure that measurements are performed with sufficient reliability to handle fast cell handovers in high-speed scenarios while avoiding excessive measurements that would unnecessarily increase power consumption

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12432597B2Radio resource management measurement method, terminal device, and network device

Publication Date: 2025.09.30 VIVO MOBILE COMM CO LTD

AI summary

This application discloses a radio resource management measurement method, a terminal device, and a network device. The RRM measurement method includes: obtaining indication information from a network, where the indication information is used to indicate a type of RRM measurement behavior of a terminal device in a high-speed scenario, and the type of RRM measurement behavior includes a first type of RRM measurement behavior or a second type of RRM measurement behavior; and in a case that the indication information indicates the first type of RRM measurement behavior, starting RRM measurement of an intra-frequency cell before an eDRX cycle arrives, and receiving a paging message when the eDRX cycle arrives. Therefore, power consumption of the terminal device can be reduced in embodiments of this application.