Location-Based Network Selection Mode Switching
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Solution Overview
Problem
Users experience unwanted registration to foreign networks when roaming in areas where public land mobile networks of adjacent countries overlap, leading to unexpected charging and un-reachability issues, as existing automatic network selection modes fail to prioritize the home network effectively within the home country.
Innovation Solution
A method and mobile terminal implementation that monitors geographical coordinates to automatically switch between home network selection and automatic network selection modes when crossing country borders, ensuring the mobile terminal only registers with the home network within the home country and switches to automatic mode when abroad, using a position monitoring unit and network selection mode control unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If automatic network selection mode is used, then the mobile terminal can automatically connect to available networks, but the terminal may register to foreign networks when home network coverage is lost, causing unexpected charging and un-reachability issues
Solution Approach 1:
The system performs preliminary actions by determining the terminal's location relative to the home country before network selection occurs. By pre-establishing location awareness and using it to guide network selection mode, the system prevents the problem of unintended foreign network registration before it happens, rather than correcting it afterward.
Solution Approach 2:
The patent implements dynamic switching between home network selection mode and automatic network selection mode based on the terminal's geographical location. When inside the home country, the system uses home network selection mode to prioritize home networks. When outside, it switches to automatic network selection mode. This dynamic adaptation resolves the contradiction by adjusting the selection strategy according to location context.
2Reliability
If manual network selection mode is used to prevent foreign network registration, then the terminal maintains home network registration, but the user must continuously monitor and manually switch networks when crossing borders
Solution Approach 1:
The system performs self-service by automatically determining the terminal's location and selecting the appropriate network selection mode without user intervention. The location determination unit continuously monitors position, and the network selection mode control unit automatically switches between home network selection mode and automatic network selection mode based on whether the terminal is inside or outside the home country, eliminating the need for manual user actions.
Solution Approach 2:
The system implements feedback by continuously monitoring the terminal's location and using this information to adjust network selection behavior. The location determination unit provides feedback about the terminal's position to the network selection mode control unit, which then adjusts the selection mode accordingly, creating a closed-loop system that automatically adapts to changing conditions.
3Adaptability or versatility
If the terminal switches network selection mode frequently when moving near borders, then it adapts to location changes, but it increases signaling load and location registration frequency
Solution Approach 1:
The patent applies local quality by implementing different network selection modes in different geographical locations. Inside the home country, home network selection mode is used with home network priority. Outside the home country, automatic network selection mode is used. This spatial differentiation allows the system to adapt to location changes while minimizing unnecessary mode switching and associated signaling, as the mode only changes when actually crossing the border boundary.
Data Source
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AI summary
The present invention relates to location based network selection in a mobile terminal moving (A to H) in a wireless communication environment set up of a home network in a home country having a border and at least one foreign network achieving radio coverage at least in part of the geographical area of the home country. A position (A to H) of the mobile terminal is monitored. Then, a network selection mode is automatically switched from a home network selection mode, enabling registration only to the home network, to an automatic network selection mode when the mobile terminal crosses the border from the home country to the foreign country. The network selection mode is switched back to the home network selection mode when the mobile terminal is again located in the home country. Thus, as long as the mobile terminal is located in the home country, it does never select any other network than the home network. When located abroad, automatic network selection applies.