Unified Database for Multimode Wireless System Selection
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Solution Overview
Problem
Multimode wireless devices face challenges in seamless system selection across different wireless technologies like 3GPP and 3GPP2, especially when roaming in areas with mixed access technologies, due to the complexity of managing multiple databases and conflicting priority orders.
Innovation Solution
The method involves translating network identities across different technologies by extending existing databases with cross-referencing information, allowing a single search database to prioritize and select the best available wireless communication system access technology, ensuring backward compatibility and efficient system selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate databases are used for different wireless technologies (3GPP PRL and 3GPP2 PRL), then each technology can be managed with its own optimized structure, but the device complexity increases and seamless system selection becomes difficult
Solution Approach 1:
The patent combines multiple technology-specific databases (3GPP PRL and 3GPP2 PRL) into a single unified database structure. This unified database stores network identifiers and priority information for multiple wireless technologies in one location, eliminating the need to manage separate databases for each technology while maintaining the ability to perform accurate system selection across different standards.
Solution Approach 2:
The unified database is designed to serve multiple wireless technologies (3GPP and 3GPP2) simultaneously with a single structure. It stores network information in a technology-agnostic format that can be used for system selection across different standards, making the database universal rather than technology-specific.
2Reliability
If technology-specific databases are used, then each database can be optimized for its specific technology, but the ease of operation decreases when roaming across mixed technologies
Solution Approach 1:
By merging 3GPP and 3GPP2 network selection databases into one unified structure, the system allows roaming operations to be performed through a single interface. The unified database stores network identifiers and priorities for both technologies together, enabling the device to seamlessly select networks across different standards without switching between separate database management systems.
3Reliability
If separate databases are maintained for different technologies, then data can be stored in technology-optimized formats, but the loss of information increases when trying to perform cross-technology system selection
Solution Approach 1:
The unified database uses a universal data structure that can represent network identifiers and priority information for multiple wireless technologies (3GPP and 3GPP2) in a single format. This structure stores technology-specific identifiers (such as MCC/MNC for 3GPP and SID/NID for 3GPP2) within a common framework, ensuring that cross-technology system selection has access to all necessary information without requiring separate database queries.
Data Source
AI summary
Methods and apparatus for system selection in a multimode wireless device are disclosed. The method and apparatus afford selection of a wireless communication system access technology from a number of wireless system access technologies supported by a wireless device. Selection is accomplished by storing identification information concerning access technologies pertaining to a first group of wireless system access technologies, such as 3GPP2, in a search database, which concerns the priority of access technologies pertaining to another group of access technologies, such as 3GPP. Selection of a preferred wireless communication system access technology from one of the wireless access technology groups is then based on the identification information stored in the search database.