Terminal Device Conditional Measurement for Wireless Handover

Solution Overview

Problem

Future wireless communications networks, such as 5G or new radio access technology (NR) networks, face challenges in efficiently supporting a wide range of devices with different data traffic profiles and mobility requirements.

Innovation Solution

A terminal device equipped with a controller that conducts initial measurements of radio signals using cell-specific reference signals (CRS) to determine if a handover is necessary, and then performs more detailed measurements using mobility reference signals (MRS) when the predetermined criteria are met.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the terminal device conducts comprehensive measurements of radio signals using multiple reference signals (CRS and MRS), then the accuracy of handover determination is improved, but the processing complexity and power consumption increase

Engineering Contradiction:

Improvehandover determination accuracyVSAvoidprocessing complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The measurement process is segmented into two distinct phases: first measuring cell-specific reference signals (CRS) to determine basic handover criteria, and then conditionally measuring mobility reference signals (MRS) for beam-specific measurements only when handover is determined to be necessary. This segmentation reduces overall processing complexity while maintaining measurement accuracy.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The terminal device performs preliminary measurements of CRS before determining whether to conduct the more complex MRS measurements. This preliminary action allows the system to filter out cases where detailed beam measurements are unnecessary, thereby reducing total processing load while ensuring accurate handover determination when needed.

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If the terminal device conducts comprehensive measurements of radio signals using multiple reference signals (CRS and MRS), then the accuracy of handover determination is improved, but the power consumption increases

Engineering Contradiction:

Improvehandover determination accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The measurement process is segmented into two distinct phases: first measuring cell-specific reference signals (CRS) to determine basic handover criteria, and then conditionally measuring mobility reference signals (MRS) for beam-specific measurements only when handover is determined to be necessary. This segmentation reduces overall processing complexity while maintaining measurement accuracy.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The terminal device performs preliminary measurements of CRS before determining whether to conduct the more complex MRS measurements. This preliminary action allows the system to filter out cases where detailed beam measurements are unnecessary, thereby reducing total processing load while ensuring accurate handover determination when needed.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If the terminal device reduces the number of measurements taken, then the processing time is reduced, but the accuracy of beam selection may deteriorate

Engineering Contradiction:

Improvehandover determination speedVSAvoidbeam selection accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The measurement process is segmented into two distinct phases: first measuring cell-level CRS to determine handover necessity, and then conditionally measuring beam-level MRS for accurate beam selection. This segmentation enables efficient processing at the cell level while maintaining accurate beam selection when handover is required.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different measurement approaches are applied at different levels: cell-specific CRS measurements provide coarse-grained handover determination, while beam-specific MRS measurements provide fine-grained beam selection accuracy. This local quality approach ensures appropriate measurement precision is applied where needed without unnecessary overhead elsewhere.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS20250119802A1Terminal device and method

Publication Date: 2025.04.10 SONY GROUP CORP

AI summary

The present technique provides a terminal device for use with a wireless telecommunications system, the terminal device comprising a receiver, a transmitter and a controller, wherein the controller is configured: to conduct a first measurement of a parameter associated with a radio signal transmitted by infrastructure equipment of the wireless telecommunications network and received by the receiver; to determine whether the measured parameter meets a predetermined criteria; and when the measured parameter is determined to meet the predetermined criteria, to conduct a second measurement of a parameter associated with a radio signal transmitted by infrastructure equipment of the wireless telecommunications network and received by the receiver. The present technique also provides an associated method and circuitry.