SIM Card Location-Based Call Routing for Power Efficiency
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Solution Overview
Problem
Existing methods for routing calls in telecommunications chip cards and access points, such as those described in GB-A-2 445 273, suffer from high power consumption due to permanent GPS communication and require additional interfaces like Wi-Fi, making them inefficient and applicable only to a minority of mobile phones.
Innovation Solution
A telecommunications chip card that receives a dialed telephone number and obtains the geographic location to fetch an access point address from a look-up table, initiating a connection via a GSM or UMTS network for efficient call routing, reducing power consumption and expanding compatibility to legacy phones by using existing network interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If GPS interface and Wi-Fi interface are used for call routing, then call routing efficiency is improved, but power consumption increases and device compatibility decreases
Solution Approach 1:
The patent extracts the location-based call routing functionality from the terminal device and implements it in the SIM card. The SIM card stores location information and routing rules, and autonomously determines the optimal routing path without requiring GPS or Wi-Fi interfaces in the terminal. This eliminates the need for power-intensive GPS communication and Wi-Fi connections while maintaining efficient call routing.
Solution Approach 2:
The SIM card acts as an intermediary between the terminal device and the network. It receives location information from the network, stores it in a look-up table, and uses this information to determine the optimal routing path. This intermediary approach allows the system to achieve efficient call routing without requiring the terminal device to have power-intensive GPS or Wi-Fi capabilities.
2Productivity
If GPS interface and Wi-Fi interface are used for call routing, then call routing efficiency is improved, but device compatibility decreases
Solution Approach 1:
The patent makes the SIM card universal by enabling it to perform location-based call routing functionality. The SIM card stores a look-up table with location information and routing rules for multiple networks and regions. This allows legacy terminal devices without GPS or Wi-Fi interfaces to still benefit from efficient call routing, as the SIM card autonomously determines the optimal routing path based on stored location information.
Solution Approach 2:
The patent extracts the location-based routing functionality from the terminal device and places it in the SIM card. This extraction eliminates the need for terminal devices to have GPS or Wi-Fi interfaces, making the solution compatible with legacy devices while maintaining efficient call routing capabilities.
3Measurement precision
If permanent GPS communication is used for location tracking, then location accuracy is improved, but power consumption increases
Solution Approach 1:
The patent implements preliminary action by having the network provide location information to the SIM card in advance. The SIM card stores this location information in a look-up table for future routing decisions. This eliminates the need for continuous GPS communication, as the SIM card can autonomously determine the optimal routing path based on pre-stored location information, significantly reducing power consumption.
Solution Approach 2:
The SIM card performs self-service by autonomously determining the optimal routing path based on stored location information. It does not require continuous GPS communication or terminal device intervention to track location, as it uses the pre-stored information in its look-up table to make routing decisions, thereby eliminating power-intensive location tracking.
Data Source
AI summary
The invention relates to a telecommunications chip card for carrying personalization data for connection to at least a mobile telecommunications network, said telecommunications chip card further comprising: means for receiving a dialed telephone number from a first wireless terminal coupled to a first network, wherein said first wireless terminal is adapted for initiating a call between said first wireless terminal and a second wireless terminal, wherein said dialed telephone number belongs to said second wireless terminal; means for obtaining a geographic location of said first wireless terminal; —means for fetching an access point address from a look-up table according to said geographic location, wherein said look-up table is stored in said telecommunications chip card, wherein said access point address belongs to an access point coupled to a second network and within said geographic location, wherein said second network is coupled to said first network; means for initiating a connection with said access point; means for sending said dialed telephone number to said access point for establishing connection through a third network between said first wireless terminal and a second wireless terminal having said dialed telephone number; means for connecting said call between said first and said second wireless terminal.