MDT Configuration in 5G Access Network with CU-UP and CU-CP
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Solution Overview
Problem
Current MDT measurement mechanisms do not support configuration of multiple entities in an access network, such as DU, CU-UP, and CU-CP, for performing MDT measurements, nor do they specify which entity is responsible for measurement and reporting.
Innovation Solution
A method for configuring MDT measurements in an access network with multiple entities, where a control node (CU-CP) receives configuration information from a core network or operation and maintenance node and configures access network nodes to perform MDT measurements, including decomposing measurement modes and configuring different entities for specific measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If MDT measurement mechanism is implemented in traditional single-entity access network, then measurement functionality is provided, but it cannot support configuration of multiple entities (DU, CU-UP, CU-CP) for performing MDT measurements
Solution Approach 1:
The patent segments the access network into multiple functional entities (DU, CU-UP, CU-CP) and assigns specific MDT measurement tasks to each entity based on their capabilities. The control node (CU-CP) receives configuration from the core network and decomposes it into sub-configurations for different access network nodes, enabling multi-entity support while managing complexity through functional division.
2Measurement precision
If multiple access network nodes perform MDT measurements, then measurement coverage and accuracy are improved, but it is unclear which entity is responsible for measurement and reporting
Solution Approach 1:
The patent assigns specific measurement responsibilities to different entities based on their local capabilities and functions. Each access network node (DU, CU-UP, CU-CP) performs measurements appropriate to its functional scope, and the control node coordinates the reporting responsibilities. This ensures that each entity has clearly defined measurement and reporting duties while contributing to overall measurement accuracy.
3Device complexity
If MDT configuration is centralized in one node, then control is simplified, but it cannot effectively coordinate measurements across multiple distributed entities
Solution Approach 1:
The control node (CU-CP) acts as an intermediary between the core network and multiple access network nodes. It receives MDT configuration from the core network, decomposes it into node-specific configurations, and distributes them to appropriate entities (DU, CU-UP). This intermediary role enables centralized control while effectively coordinating measurements across distributed entities through structured configuration distribution and result collection.
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). The present application provides a configuration method, a reporting method of a minimization of drive tests (MDT) measurement and an access network device, wherein the configuration method comprises: receiving, by a user node of an access network (CU-UP), a configuration information of MDT from an operation and maintenance node; transmitting, by the CU-UP, the configuration information of MDT to a control node of an access network (CU-CP); receiving, by the CU-UP, the configuration information of MDT for UE from the CU-CP. The MDT under a separate architecture is achieved by the present application.