5G NR Measurement Gap Configuration for Inter-Frequency Cell Detection
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Solution Overview
Problem
In 5G NR, user equipment (UE) faces challenges in correctly detecting and measuring inter-frequency neighboring cells due to the lack of research on measurement gaps (MG) required for cell detection and measurement.
Innovation Solution
A method and device for configuring measurement gap length (MGL) and measurement gap repetition period (MGRP) based on synchronization signal (SS) burst set periodicities, considering the greatest, smallest, and default values, as well as RF switching time, to enable accurate UE measurements across different frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If measurement gap (MG) is not configured for inter-frequency neighboring cell detection, then UE can maintain continuous communication with serving cell, but UE cannot correctly detect and measure inter-frequency neighboring cells
Solution Approach 1:
The patent applies preliminary action by configuring measurement gaps in advance before inter-frequency cell detection is needed. The measurement gap configuration is set up beforehand to allow UE to tune to different frequencies and perform measurements, ensuring that when handover or cell reselection is required, the UE can quickly and accurately detect neighboring cells without interruption to ongoing communication.
2Measurement precision
If measurement gap length (MGL) and repetition period (MGRP) are not optimized based on SS burst set periodicities, then measurement configuration is simple, but UE cannot accurately detect cells with different SS burst set periodicities
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting measurement gap length (MGL) and repetition period (MGRP) based on the SS burst set periodicities of neighboring cells. The system changes these temporal parameters to match or accommodate the periodic transmission patterns of synchronization signals, enabling accurate detection across different frequency bands with varying SS burst set configurations.
Solution Approach 2:
The patent implements dynamics by making the measurement gap configuration adaptive rather than fixed. The MGL and MGRP are determined based on the detected SS burst set periodicities of neighboring cells, allowing the measurement gap parameters to dynamically adjust to the specific characteristics of each frequency band and cell configuration, thereby improving measurement accuracy without requiring overly complex manual configuration.
3Adaptability or versatility
If measurement gap is configured with fixed parameters, then configuration is simple, but cannot accommodate different SS burst set periodicities across frequency bands
Solution Approach 1:
The patent applies universality by designing a measurement gap configuration mechanism that can handle multiple frequency bands and SS burst set periodicities through a single adaptive framework. The system uses the detected SS burst set periodicity information to automatically determine appropriate MGL and MGRP values, making the same measurement gap configuration process applicable across FDD, TDD, and other frequency bands without requiring separate fixed configurations for each band.
Data Source
AI summary
A disclosure of the present specification provides a method by which a wireless device performs measurement. The method can include: a step for receiving information about a plurality of synchronization signal (SS) burst set periods from a serving cell; and a step for performing measurements on a plurality of neighbor cells on the basis of a measurement gap length (MGL) and a measurement gap repetition period (MGRP) set on the basis of the plurality of SS burst set periods. The MGL and the MGRP can be set in consideration of one or more among L, representing the largest value among the SS burst set periods, S, representing the smallest value among the SS burst set periods, D, representing a default value of the SS burst set period, and R, representing a radio frequency (RF) switching time of the wireless device.