Cellular Device Characterization Through Synchronized Scanning
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Solution Overview
Problem
Cellular devices often communicate using frequencies outside the frequency band monitored by locating equipment, leading to inefficient detection and characterization.
Innovation Solution
Synchronize the communication slots allocated by the base station scheduler with the frequency bands monitored by the locating equipment, ensuring the locating equipment listens to the allocated frequency during the communication slots, allowing for efficient identification and location of cellular devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the locating equipment performs a temporal scan of the entire frequency range sequentially, then it can cover all cellular communication frequencies, but it cannot detect cellular devices communicating on frequencies outside the currently listened band
Solution Approach 1:
The base station scheduler pre-allocates specific communication slots and frequencies to cellular devices before communication occurs. The locating equipment is provided with this scheduling information in advance, allowing it to pre-position its frequency tuning and timing to match the allocated slots, ensuring reliable detection without missing devices
Solution Approach 2:
The system uses the base station's scheduling decisions as feedback to coordinate the locating equipment's scanning behavior. The scheduler's allocation of frequency-time resources to specific devices informs the locating equipment when and where to listen, creating a closed-loop system that adapts to actual communication needs
2Measurement precision
If the locating equipment listens to a limited frequency band at a time, then it can maintain high measurement precision for that band, but it misses devices using frequencies outside the current band
Solution Approach 1:
The locating equipment receives advance information about which frequency bands will be used in upcoming communication slots. It pre-positions itself to listen to the correct frequency band before devices begin transmitting, ensuring both precision and complete device detection without missing any transmissions
Solution Approach 2:
The locating equipment dynamically adjusts its listening frequency and timing based on the scheduler's allocations. Rather than scanning frequencies sequentially or staying fixed, it flexibly moves to the exact frequency and time slots where devices will communicate, maintaining precision while capturing all devices
3Productivity
If the locating equipment performs sequential scanning of frequency bands, then it can systematically cover the entire range, but it cannot detect devices communicating during link communication slots on unmonitored frequencies
Solution Approach 1:
The system performs preliminary coordination between the scheduler and locating equipment before actual communication occurs. The scheduler's allocation plan is communicated to the locating equipment in advance, allowing it to prepare and tune to the correct frequencies and time slots before devices begin transmitting their identifiers
Solution Approach 2:
The base station scheduler acts as an intermediary that translates device communication requirements into locating equipment scanning parameters. It converts the abstract need to detect devices into concrete frequency-time instructions for the locating equipment, enabling reliable detection without manual configuration
Data Source
AI summary
The invention relates to a method (100) for characterizing cellular devices, said method comprising the following steps for each cellular device:allocating (106) at least one dedicated communication slot each comprising a communication time and a communication frequency; andreceiving (112), by said base station at said at least one allocated communication slot, a signal emitted by said cellular device comprising an identifier of said cellular device;said method (100) further comprising a temporal scan of said frequency range according to a scanning plan, by equipment for locating cellular devices; characterized in that it comprises synchronization (104) of said scanning plan and of each communication slot so that the locating equipment is listening for 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.