Multimode Wireless Device System Selection Database
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Solution Overview
Problem
Current multimode wireless devices face challenges in seamlessly selecting the best available wireless system access technology across different geographic regions and technologies, such as 3GPP and 3GPP2, due to differences in network identification and prioritization mechanisms, leading to inefficient system selection and potential conflicts between access technologies.
Innovation Solution
The method involves storing identification information about 3GPP2 technologies in a database associated with 3GPP technologies, using extension bits to indicate support for 3GPP2 systems, and employing mapping tables to translate SID/NID combinations to MCC/MNC pairs, allowing for prioritization and selection of the best available access technology based on geographic location and network preferences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate databases are used for 3GPP and 3GPP2 technologies, then each technology can be managed independently, but system selection complexity increases and seamless roaming becomes difficult
Solution Approach 1:
The patent combines 3GPP and 3GPP2 network selection databases into a unified database structure. The unified database stores both PLMN information (for 3GPP) and PRL information (for 3GPP2) in an integrated manner, allowing the device to manage both technology types through a single database interface, thereby reducing management complexity while maintaining reliable system selection
Solution Approach 2:
The unified database is designed to serve multiple functions: it stores network identification information for both 3GPP and 3GPP2 technologies, manages priority relationships across different technology types, and supports seamless roaming operations. This multi-functional database eliminates the need for separate database management systems for each technology
2Adaptability or versatility
If multiple access technologies are supported, then adaptability to different geographic regions improves, but conflict between access technologies arises
Solution Approach 1:
The patent implements location-specific network selection by storing priority information in the unified database that is tailored to different geographic regions. The database contains region-specific PLMN and PRL data with appropriate priorities, allowing the device to adapt to local network conditions while maintaining stable and consistent system selection behavior in each region
Solution Approach 2:
The system dynamically adjusts network selection parameters based on the current geographic location and available access technologies. By changing priority parameters and network identification criteria in the unified database according to location, the system achieves both adaptability to different regions and stability in the selection process
3Productivity
If identifier translation is implemented, then system selection efficiency improves, but database structure complexity increases
Solution Approach 1:
The unified database acts as an intermediary layer between the device and multiple access technologies (3GPP and 3GPP2). It provides a standardized interface for network selection while handling the complexity of translating between different identifier systems (PLMN for 3GPP, PRL for 3GPP2) internally, thereby improving selection efficiency without exposing the complexity to the user or higher-level protocols
Data Source
AI summary
Devices and methods are provided for system selection from a plurality of wireless system access technologies, such as a first group (e.g., 3GPP2 technologies) and a second group (e.g., 3GPP technologies). In one embodiment, the method may involve storing identification information pertaining to the first group in a database, wherein the database may concern the priority of ones of the access technologies pertaining to the second group. The method may also involve selecting a preferred access technology from one of the first and second groups based at least in part on the identification information stored in the database.