Interrogation Device Multi-Network Location Estimation
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Solution Overview
Problem
Law-enforcement or security personnel face challenges in accurately tracking a mobile communication terminal's location, as existing methods rely on single-network base stations which may not provide precise location estimates due to limited geographical coverage.
Innovation Solution
An interrogation device that solicits a mobile communication terminal to associate with multiple networks, allowing it to receive signals from a diverse set of base stations, and communicates the signal strengths to estimate the terminal's location, thereby improving accuracy through a multi-network NMR.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a mobile communication terminal associates with a single network and uses only in-network base stations for location estimation, then the system complexity is reduced and the terminal operates within a manageable network scope, but the location estimation precision is insufficient due to limited geographical coverage
Solution Approach 1:
The interrogation device performs multiple functions: it acts as a network controller for the host network while simultaneously managing a virtualized network that includes out-of-network base stations. This multi-functionality allows the system to collect location data from diverse base stations across multiple networks without requiring separate dedicated systems for each network, thereby improving location estimation precision while controlling overall system complexity
Solution Approach 2:
The interrogation device serves as an intermediary between the mobile communication terminal and multiple base stations across different networks. It collects location estimation data from the terminal while managing communications with both in-network and out-of-network base stations, acting as a mediator that consolidates data from multiple sources without requiring the terminal to directly manage complex multi-network interactions
2Measurement precision
If the terminal receives signals from multiple out-of-network base stations, then the geographical distribution of reference points increases and location precision improves, but the terminal must process and communicate more data about signal properties from diverse networks
Solution Approach 1:
The system extracts only the essential location estimation data from the multiple base station signals. Instead of processing all available signal information from out-of-network base stations, the interrogation device selectively collects and processes only the necessary signal properties (such as signal strength and timing information) required for location estimation, thereby reducing the data processing burden on the terminal while maintaining location precision
Solution Approach 2:
The interrogation device provides feedback to the terminal about which base stations and signal properties are most useful for location estimation. This feedback mechanism allows the terminal to prioritize communicating specific signal properties from out-of-network base stations, reducing unnecessary data transmission and processing while maintaining accurate location estimation
Data Source
AI summary
Apparatus and methods are described, including an interrogation device comprising an antenna, a transmitter-receiver (transceiver), and a processor. The processor, via the transceiver and the antenna, solicits a mobile communication terminal to associate with the interrogation device. While the solicited terminal is associated with the interrogation device, by communicating to the terminal respective identifiers of a plurality of base stations that collectively belong to a plurality of mobile communication networks, the processor drives the terminal to receive respective signals from at least some of the base stations, and communicate a property of at least some of the received signals to the processor. Other embodiments are also described.