Adaptive MDT Logging for RRC States

Solution Overview

Problem

Current LTE networks face challenges in managing immense amounts of logged minimization of drive test (MDT) measurements across various radio resource controller (RRC) states, leading to increased energy consumption, memory storage issues, and data usefulness limitations, as existing logging configurations are static and do not adapt to varying network and user equipment conditions.

Innovation Solution

Implementing a method that differentiates logged measurement configurations based on user equipment connection states, allowing for network-based and user equipment-based selection criteria to control data logging, thereby optimizing data collection and reporting for RRC_IDLE and RRC_INACTIVE states, using a common data-storing model and selective configuration approaches.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If logged measurement configurations are applied to all RRC states uniformly, then measurement coverage is improved, but energy consumption and memory usage increase excessively

Engineering Contradiction:

Improvemeasurement coverageVSAvoidenergy consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The patent applies different logged measurement configurations to different RRC states (IDLE, INACTIVE, CONNECTED) based on local quality principles. Each state receives customized configuration parameters tailored to its specific characteristics, allowing the system to optimize measurement coverage while reducing energy consumption in states where full measurement logging is not necessary.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system dynamically adjusts measurement configuration parameters based on the current RRC state. The network element receives user equipment information indicating the state and selects appropriate configuration parameters accordingly, enabling adaptive measurement logging that responds to changing network conditions and device states.

Inventive Principle:

Principle #15Dynamics

2Measurement precision

If logged measurement configurations are applied to all RRC states uniformly, then measurement coverage is improved, but memory storage requirements increase excessively

Engineering Contradiction:

Improvemeasurement coverageVSAvoidmemory storage

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent applies different logged measurement configurations to different RRC states (IDLE, INACTIVE, CONNECTED) based on local quality principles. Each state receives customized configuration parameters tailored to its specific characteristics, allowing the system to optimize measurement coverage while reducing memory storage requirements in states where full measurement logging is not necessary.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system dynamically adjusts measurement configuration parameters based on the current RRC state. The network element receives user equipment information indicating the state and selects appropriate configuration parameters accordingly, enabling adaptive measurement logging that responds to changing network conditions and device states.

Inventive Principle:

Principle #15Dynamics

3Device complexity

If static logging configurations are used, then configuration simplicity is maintained, but adaptability to varying network and device conditions deteriorates

Engineering Contradiction:

Improveconfiguration simplicityVSAvoidadaptability to network conditions

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The system dynamically adjusts measurement configuration parameters based on the current RRC state. The network element receives user equipment information indicating the state and selects appropriate configuration parameters accordingly, enabling adaptive measurement logging that responds to changing network conditions and device states.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The network element receives user equipment information that indicates the current RRC state, and based on this feedback, selects and applies appropriate logged measurement configuration parameters. This feedback mechanism enables the system to adapt to varying network and device conditions while maintaining manageable configuration complexity.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS12150158B2Handling of multiple minimization of drive test contexts in multiple radio resource controller states

Publication Date: 2024.11.19 NOKIA TECHNOLOGIES OY

AI summary

Systems, methods, apparatuses, and computer program products for handling multiple minimization of drive test (MDT) contexts for uses in radio resource controller (RRC) states. One method may include receiving, from a network element, a logged measurement configuration including specific configuration content for a user equipment differentiated per and depending on a connection state of the user equipment. The method may also include performing logging of a measurement per the user equipments state according to the specific configuration content in the logged measurement configuration. The method may further include transmitting a report of the logged measurement pertaining to one of the user equipment states, to the network element. The specific configuration content may restrict the logging according to one or more of a network-based selection criteria, and user equipment-based selection criteria.