AGNSS UE Location Using MCC/MNC Coarse Reference Fallback
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Solution Overview
Problem
Existing AGNSS based location query methods fail due to dependency on Service Cell ID location information, leading to reduced success rates and increased response times, especially in networks with missing or incomplete cell ID data.
Innovation Solution
A system that utilizes a coarse reference database populated with Mobile Country Code (MCC) and Mobile Network Code (MNC) level coordinates as a fallback, allowing the identification of best visible satellites and deriving precise location coordinates even when serving cell ID information is missing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If AGNSS based location query uses serving cell ID information for coarse location, then location accuracy is improved, but the method fails when cell ID data is missing or incomplete
Solution Approach 1:
The patent introduces MCC and MNC as intermediary elements between the incomplete cell ID information and the coarse location. Instead of directly relying on complete cell ID data, the system uses MCC/MNC codes extracted from available cell information to query a database and obtain coarse location, thereby maintaining reliability even when cell ID data is incomplete
Solution Approach 2:
The patent performs preliminary extraction of MCC and MNC codes from the serving cell ID information before attempting to obtain coarse location. This preliminary action ensures that even if complete cell ID data is unavailable, the essential MCC/MNC identifiers are already extracted and can be used to query the location database
2Measurement precision
If the system relies on complete cell ID database, then location query accuracy is maintained, but response time increases due to database lookup requirements
Solution Approach 1:
The patent extracts only the essential MCC and MNC components from the complete cell ID information, discarding unnecessary parts. This extraction reduces the data processing burden and enables faster database queries while still obtaining sufficient accuracy for coarse location determination
Solution Approach 2:
The patent uses partial cell ID information (MCC/MNC only) rather than requiring complete cell ID data. This partial action approach reduces the complexity of database lookups and speeds up the coarse location acquisition process while maintaining adequate accuracy
Data Source
AI summary
The present invention provides an efficient and reliable systems and methods for facilitating a fixed coarse reference coordinate populated in locations platform. The granularity of this coarse location reference can be at a combination of Mobile Country Code (MCC) and Mobile Network Code (MNC) level. Whenever there is serving cell ID received which is not populated in locations platform cell ID database (DB), the locations platform can consider a default reference coordinate basis that can be a combination of MCC and MNC value received in an E-UTRAN Cell Global Identifier (ECGI) format of the serving cell ID information. This ensures that always coarse reference coordinates are available with locations platform which can be considered to identify which satellites are best visible to a given UE and accordingly send the assistance data for computing the location basis AGNSS method.