Multi-RAT Dual-Connectivity MDT Reporting Reliability
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Solution Overview
Problem
Conventional techniques for configuring user equipment (UE) to perform and report minimization of drive test (MDT) measurements in multi-radio access technology (RAT) dual connectivity scenarios are deficient, leading to inefficiencies and potential loss of measurement data.
Innovation Solution
The UE receives an MDT measurement configuration with specified RAT types for collecting and reporting MDT measurements, allowing it to collect measurements for multiple RATs and report them via a common RAT type, even if initial connectivity is lost, thereby optimizing data collection and reporting processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional techniques are used to configure UE for MDT measurements in multi-RAT dual connectivity, then measurement data collection is performed, but data loss occurs and reliability deteriorates
Solution Approach 1:
The network pre-configures the UE with multiple RAT types for both measurement collection and reporting before actual MDT measurement is performed. This preliminary configuration ensures that the UE has ready-to-use reporting paths for multiple RATs, so when measurement data is collected, the appropriate reporting RAT is already determined, preventing data loss due to connectivity issues.
Solution Approach 2:
The UE is configured to use a common RAT type for both collecting and reporting MDT measurements across multiple RATs. This multi-functional approach allows the same measurement configuration to serve multiple RATs (e.g., LTE and NR), and the UE can report measurements for different RATs via a unified reporting mechanism, enhancing reliability while reducing complexity.
2Measurement precision
If separate configurations are used for each RAT, then specific measurements are captured, but device complexity and configuration overhead increase
Solution Approach 1:
A single MDT measurement configuration is designed to universally support multiple RATs by specifying multiple RAT types in both the measurement collection and reporting parameters. This universal configuration eliminates the need for separate configurations for each RAT, reducing device complexity and configuration overhead while maintaining the ability to perform RAT-specific measurements through the common configuration framework.
3Reliability
If frequent reporting is implemented to ensure data delivery, then reliability improves, but power consumption and transmission overhead increase
Solution Approach 1:
The network determines and specifies the appropriate reporting RAT type in advance through the MDT measurement configuration. This preliminary determination of the optimal reporting path allows the UE to transmit measurements efficiently using the pre-selected RAT, avoiding frequent retransmissions and retries that would consume additional power, while still ensuring reliable data delivery through the configured reporting mechanism.
Data Source
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AI summary
Methods, systems, and devices for wireless communication are described. Generally, the described techniques provide for efficiently collecting and reporting minimization of drive test (MDT) measurements for one or more radio access technology (RAT) types and/or for multiple base stations in a dual connectivity deployment. In one example, a user equipment (UE) may receive an MDT measurement configuration indicating a first RAT type for collecting measurements and a second RAT type for reporting measurements. In this example, the UE may use the measurement configuration to collect MDT measurements for the first RAT type, and the UE may report the MDT measurements to a base station associated with the second RAT. Further techniques for efficiently collecting and reporting MDT measurements in a dual connectivity deployment are also described herein.