Location-Based SIM Switching to Avoid Costly Network Handoffs
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Solution Overview
Problem
Existing mobile telecommunications devices that switch between SIMs based on radio signal strength may inadvertently select more costly networks when an existing network is still adequate, leading to inefficient network usage.
Innovation Solution
A method and device that utilize geographic location identification, specifically through GNSS or UWB localization, to determine when to switch between SIMs, prioritizing network selection based on predefined geographic locations (geofences) and signal strength thresholds, ensuring seamless transitions between networks while minimizing costly connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the device switches between SIMs based only on RSSI, then the device can quickly respond to signal strength changes, but it may switch to more costly networks when the existing network is still adequate
Solution Approach 1:
The patent introduces a new dimension of decision-making by incorporating geographic location data alongside the traditional RSSI metric. The system transitions from one-dimensional (RSSI only) to two-dimensional (location + RSSI) decision space, enabling the device to consider both signal strength and spatial context when selecting networks, thereby avoiding unnecessary switches to costly networks while maintaining adequate connectivity
Solution Approach 2:
The patent changes the parameter set used for network selection from solely RSSI to a combination of geographic location and RSSI. By modifying the decision parameters to include location information, the system can distinguish between temporary signal fluctuations and genuine need for network switching, reducing unnecessary transitions to more expensive networks
2Loss of energy
If the device uses geographic location for SIM switching, then it can avoid unnecessary switches to costly networks, but it requires additional hardware and processing resources
Solution Approach 1:
The patent leverages the existing GNSS receiver's multi-functionality by utilizing its location determination capability for network selection purposes in addition to its primary navigation function. This approach allows the system to gain location-based network optimization benefits without adding dedicated hardware, as the GNSS receiver already performs location tracking and can serve dual purposes
Solution Approach 2:
The system employs the device's existing GNSS receiver and processing capabilities to perform location-based network selection autonomously. The device uses its own built-in location services and processing units to make intelligent network switching decisions without requiring external assistance or additional specialized hardware, thereby minimizing added complexity
3Reliability
If the device switches SIMs frequently to optimize network coverage, then it can maintain better connectivity, but it increases latency and bandwidth outages
Solution Approach 1:
The patent implements preliminary action by pre-defining geographic locations and associated network preferences before the device needs to make switching decisions. The system stores location data and network information in advance, enabling rapid comparison and decision-making when network conditions change, thereby reducing switching latency while maintaining connectivity reliability
Solution Approach 2:
The system continuously monitors both geographic location and RSSI values, creating a feedback loop that enables dynamic yet informed network selection. By receiving real-time feedback on location and signal strength, the device can make timely switching decisions only when necessary, balancing connectivity reliability with minimal switching latency
Data Source
AI summary
The disclosure relates to switching SIMs in a mobile telecommunications device based on geographic location. Example embodiments disclosed include a method of operating a mobile telecommunications device having a first SIM and a second SIM, the method comprising: identifying a geographic location of the device; operating the device using the first SIM to connect to a first network if the device is within a first geographic location; and operating the device using the second SIM to connect to a second network if the device is within a second geographic location and if a received signal strength indicator, RSSI, of the second network is greater than a predefined threshold value.