Cellular Device Characterization Through Synchronized Frequency Scanning
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Solution Overview
Problem
Cellular devices often communicate using frequencies outside the frequency band monitored by location equipment, leading to missed detection and inefficient characterization.
Innovation Solution
A method involving synchronization of communication slots with location equipment frequency bands, ensuring the location equipment listens to the allocated communication frequency during cellular device interactions, allowing for efficient identification and location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If location equipment performs time sweep of entire frequency range sequentially, then it can cover all cellular communication frequencies, but it cannot detect devices communicating on frequencies outside the currently listened band
Solution Approach 1:
The base station scheduler pre-allocates communication slots and frequencies to cellular devices before communication occurs. The location equipment is provided with this allocation information in advance, allowing it to proactively tune to the correct frequencies at the correct times, eliminating the mismatch between location equipment scanning and actual device communication frequencies
Solution Approach 2:
The system uses feedback from the base station's scheduling decisions to control the location equipment's frequency tuning. The location equipment receives information about which frequencies and time slots are allocated to which devices, and adjusts its reception accordingly, creating a closed-loop system that ensures detection capability matches actual communication patterns
2Productivity
If location equipment listens to limited frequency band at a time, then it can focus on specific bands, but it misses devices using frequencies outside the current band
Solution Approach 1:
The location equipment is provided with preliminary information about frequency allocations from the base station scheduler. This allows it to pre-position itself on the correct frequencies before devices begin transmitting, ensuring no detection opportunities are missed while maintaining focused, efficient scanning of specific bands at specific times
3Productivity
If base station allocates dedicated communication slots to devices, then it enables efficient device communication, but it requires location equipment to precisely synchronize with these allocated slots to detect devices
Solution Approach 1:
The system merges the scheduling function of the base station with the frequency control of the location equipment. By providing the scheduler's allocation decisions directly to the location equipment, the two previously independent functions are combined into a coordinated system, reducing synchronization complexity while maintaining communication efficiency
Solution Approach 2:
The base station acts as an intermediary that translates its scheduling decisions into control signals for the location equipment. This intermediary role simplifies the synchronization task by providing a clear mapping between communication slot allocations and location equipment frequency/timing adjustments
Data Source
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AI summary
The invention relates to a method (100) for characterizing cellular devices, said method comprising the following steps for each cellular device: - allocation (106), of at least one dedicated communication slot each comprising a communication schedule and a communication frequency; and - reception (112), by said base station at said at least one allocated communication slot, of a signal transmitted by said cellular device comprising an identifier of said cellular device; said method (100) further comprising a time scan of said frequency range according to a scan plan, by cellular device location equipment;characterized in that it comprises a synchronization (104) of said scanning plan and of each communication slot so that the location equipment is listening to a frequency band comprising the communication frequency of said communication slot at the communication time of said communication slot. It also relates to a system and a base station comprising means configured to implement this method.;