Cellular Network Handset Location Tracking via GPS and RRSTM
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Solution Overview
Problem
Cellular communication networks face challenges in accurately determining the location of mobile handsets, leading to inefficient call routing and battery consumption, particularly in scenarios where handsets move rapidly or unpredictably, as existing triangulation methods and Registration-Request Signal transmissions are not optimized for individual user behavior.
Innovation Solution
Implementing a Registration-Request Signal Transmission Management (RRSTM) logic that dynamically adjusts the frequency of Registration-Request Signal transmissions based on GPS location data, suppressing transmissions when the handset has not moved more than 100 feet and embedding GPS location data in R-R signals to enhance location accuracy and reduce battery usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If triangulation based on signal strength is used to determine handset location, then location can be obtained without GPS, but location precision deteriorates when handsets move rapidly or unpredictably
Solution Approach 1:
The system dynamically switches between GPS-based location determination and triangulation-based location determination based on movement detection. When rapid or unpredictable movement is detected, the system transitions from relying on periodic triangulation to using GPS data, thereby adapting to changing conditions and maintaining location reliability.
Solution Approach 2:
The system changes the parameter of location determination method based on movement characteristics. By detecting movement patterns and switching between GPS and triangulation methods, the system optimizes location precision and reliability according to the specific operational context.
2Measurement precision
If Registration-Request Signal transmissions are performed frequently to track handset location, then location accuracy improves, but battery consumption increases
Solution Approach 1:
The system dynamically adjusts the frequency of Registration-Request Signal transmissions based on detected movement. When movement is detected, the system increases transmission frequency to maintain accurate location tracking. When no movement is detected, transmissions are suppressed, thereby reducing battery consumption while maintaining location accuracy when needed.
Solution Approach 2:
The system changes the transmission frequency parameter of Registration-Request Signals based on movement detection. By adjusting this parameter dynamically, the system optimizes the balance between location accuracy and battery consumption.
3Measurement precision
If GPS functionality is continuously used to track handset location, then location precision is maintained, but battery consumption increases
Solution Approach 1:
The system dynamically switches between GPS-based location determination and triangulation-based location determination based on movement detection. When rapid or unpredictable movement is detected, the system transitions from relying on periodic triangulation to using GPS data, thereby adapting to changing conditions and maintaining location reliability.
4Ease of operation
If call routing is based on last known cell area, then network operation is simplified, but call routing efficiency deteriorates when handsets move rapidly
Solution Approach 1:
The system dynamically adjusts call routing strategy based on movement detection. When movement is detected, the system switches from paging across multiple cells based on last known area to using current GPS location data for immediate and accurate call routing, thereby maintaining operational simplicity while improving routing efficiency during movement.
Data Source
AI summary
A cellular communication network has a mobile switching center (MSC) that maintains a GPS location data of a mobile handset referenced by a mobile identification number (MIN) and an electronic serial number (ESN) in addition to a geographic cell number in an HLR database for handsets operating in the network. The GPS location data of the handset may be used for efficient paging to a specific cell to route incoming calls to the handset, route emergency responder calls with the physical location of the handset and to program the handset with the handset transmission strength to the nearest cell tower In lieu of using triangulation algorithm.