User Equipment Inter-RAT Measurement Configuration in 5G NR
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Solution Overview
Problem
In a 5G New Radio (NR) system, user equipment connected only to LTE faces uncertainty regarding inter-frequency measurements when measuring NR cells without configuring a measurement gap on the LTE side, leading to unclear relationships with measurement gaps for each user equipment and frequency range.
Innovation Solution
The user equipment receives configuration information for inter-RAT measurements in different frequency ranges and measurement gaps from a base station, allowing it to perform inter-RAT measurements within or outside the measurement gap, or without stopping data transmission/reception, to determine the appropriate inter-frequency measurement configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement gap is configured for inter-RAT measurement in FR2, then measurement accuracy is improved, but data transmission/reception is interrupted
Solution Approach 1:
The patent segments the measurement approach by frequency range: FR1/other RATs use measurement gap with stopped data transmission, while FR2 uses measurement without stopping data transmission. This segmentation allows each frequency range to use the most appropriate measurement method, resolving the contradiction between measurement accuracy and data transmission continuity.
Solution Approach 2:
Different measurement qualities are applied to different frequency ranges: FR1 uses traditional measurement gap method with complete signal interruption for high accuracy, while FR2 uses measurement without interruption suitable for its characteristics. This local quality approach optimizes both measurement accuracy and data transmission for each specific frequency range.
2Productivity
If measurement gap is not configured for inter-RAT measurement in FR2, then data transmission/reception continues, but measurement configuration becomes unclear
Solution Approach 1:
The patent implements feedback mechanisms where the base station provides configuration information to the user equipment about which measurement method to use for each frequency range. This feedback ensures clear measurement configuration even when measurement gap is not configured, resolving the uncertainty while maintaining data transmission continuity.
Solution Approach 2:
The measurement configuration is made dynamic and adaptable: the system can switch between measurement gap and non-gap approaches based on the frequency range and network conditions. This dynamic configuration provides clarity on when to use each method while allowing continuous data transmission where appropriate.
3Device complexity
If inter-RAT measurement in FR2 is performed without measurement gap, then device complexity is reduced, but measurement precision may deteriorate
Solution Approach 1:
The patent changes the operational parameters of measurement based on frequency range: FR2 measurements are performed with different timing and signal processing parameters that allow accurate measurement without complete signal interruption. This parameter change reduces device complexity while maintaining measurement precision for FR2 specifically.
Data Source
AI summary
Provided is a user equipment including: a receiving unit that receives at least one of configuration information of inter-radio access technology (RAT) measurement in a frequency range (FR) 2, configuration information of inter-RAT measurement other than the FR2, and configuration information of a measurement gap for each user equipment from a base station apparatus; and a control unit that performs the inter-RAT measurement other than the FR2 within the measurement gap for each user equipment and performs the inter-RAT measurement in the FR2 outside the measurement gap for each user equipment.