MDT Measurement Logging for Specific Areas in Wireless Terminals
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Solution Overview
Problem
In wireless communication systems, performing Minimization Driving Test (MDT) measurements in RRC idle mode can cause unnecessary battery and memory consumption, as terminals may be required to conduct measurements across all configured areas, including those not of interest to service providers.
Innovation Solution
A method where a network selects specific terminals to perform logged MDT measurements in RRC idle mode, with measurement configurations including area information and triggering conditions, allowing terminals to store and report measurement results only for specific areas of interest, thereby reducing unnecessary measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If terminals perform MDT measurements in RRC idle mode across all configured areas, then measurement coverage is improved, but battery and memory consumption increases
Solution Approach 1:
The patent applies local quality by configuring terminals to perform MDT measurements only in specific target areas rather than uniformly across all areas. The network provides area information (cell IDs, tracking area codes, or geographic coordinates) that defines where measurements should be conducted, allowing terminals to selectively measure only in relevant locations, thus reducing energy consumption while maintaining measurement effectiveness.
Solution Approach 2:
The patent implements partial action by having terminals perform measurements only in the subset of areas that are actually needed for network optimization, rather than conducting exhaustive measurements in all configured areas. The triggering conditions (area-based or event-based) ensure that measurements are taken only when and where necessary, avoiding unnecessary energy expenditure on redundant measurements.
2Measurement precision
If terminals perform MDT measurements in RRC idle mode across all configured areas, then measurement coverage is improved, but memory consumption increases
Solution Approach 1:
The patent reduces memory consumption by applying local quality - terminals store and process measurement results only for specific target areas rather than accumulating data from all areas. The network configures area information that limits the scope of measurement logging, so terminals maintain smaller measurement logs containing only relevant data from configured target areas, freeing up memory resources.
Solution Approach 2:
The patent extracts only the necessary measurement data from the overall measurement set. By defining specific target areas through area information and triggering conditions, the system extracts and retains only measurement results from those areas, discarding or ignoring measurements from non-target areas. This selective extraction reduces the volume of stored measurement logs.
3Loss of information
If terminals perform MDT measurements in all areas, then comprehensive measurement data is obtained, but resource efficiency decreases
Solution Approach 1:
The patent achieves resource efficiency through local quality by concentrating measurement efforts on specific target areas identified by the network. Instead of uniformly measuring all areas, terminals focus resources on configured target areas (defined by cell IDs, tracking area codes, or geographic coordinates), ensuring comprehensive data collection where needed while avoiding waste in non-critical areas, thus improving overall resource efficiency.
Solution Approach 2:
The patent implements partial action by having terminals perform measurements only in the necessary subset of areas rather than conducting exhaustive measurements everywhere. The triggering conditions ensure that measurement resources are allocated efficiently - terminals take measurements only when area-based or event-based triggers are met, avoiding unnecessary measurements and optimizing resource utilization while maintaining data completeness for target areas.
Data Source
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AI summary
Disclosed is a wireless communication system and terminal for providing a wireless communication service, and more particularly, a method of effectively perform an operation of MDT (Minimization Driving Test) for a specific area or a specific cell in an Evolved Universal Mobile Telecommunications System (E-UMTS) evolved from a UMTS, Long Term Evolution (LTE) System or LTE-Advanced (LTE-A) system.