Multi-Device RFID System with Master-Slave Control
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Solution Overview
Problem
Existing RFID systems face limitations in extending communication areas and managing the installation of multiple readers/writers, which can lead to reduced communication distances, interference issues, and limited flexibility in designing optimal communication zones.
Innovation Solution
The implementation of a multi-device RFID system comprising a master reader/writer and slave reader/writers connected via a hub, allowing for flexible installation and extended communication areas, with the master controlling communication processing and enabling reliable reading/writing of IC tags even when their position varies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a plurality of readers/writers is arranged to extend communication area, then communication area is extended, but device complexity increases and control becomes more complicated
Solution Approach 1:
The system divides the communication area into multiple zones, each covered by a separate reader/writer. Each reader/writer independently manages its own communication zone, segmenting the overall control function and reducing the complexity burden on any single device while collectively extending the total communication area.
Solution Approach 2:
A host device acts as an intermediary that coordinates communication between multiple readers/writers and IC tags. The host device receives communication requests, determines which reader/writer should handle each tag, and manages the overall control logic, thereby simplifying individual reader/writer complexity while enabling extended communication coverage.
2Ease of operation
If readers/writers are connected via wireless communication, then installation flexibility is improved, but communication reliability deteriorates due to potential interference
Solution Approach 1:
The system implements feedback mechanisms where readers/writers continuously monitor communication quality and interference levels. Based on feedback information about channel conditions, the host device can dynamically adjust communication parameters, select optimal readers/writers for specific tasks, and reconfigure the network to maintain reliable communication despite wireless interference.
3Reliability
If communication distance is reduced to improve reliability, then communication reliability is improved, but communication area is reduced
Solution Approach 1:
The system merges the communication capabilities of multiple readers/writers to collectively cover a large area. Each reader/writer maintains a reliable short-to-medium range communication zone, and by strategically positioning and coordinating multiple devices, the system achieves both high reliability within each zone and extensive overall coverage through the combined effect of all zones.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for reliable and flexible communication with IC tags across a wider area, enabling free installation of communication devices and optimizing communication zones, even during high-speed movements or when tags are positioned variably.
Implementation Method 1
a reader/writer to be a communication device configured to execute communication processing with the IC tag
Data Source
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AI summary
The present invention provides an RFID system capable of freely installing a plurality of communication devices and designing a desirable communication area, and a communication device configured to implement the system. In the RFID system, a first communication device (10) configured to communicate with a control device (1) includes a command receiver (102) configured to receive a command from the control device (1), a first communication processing unit (104) configured to perform communication with an IC tag in order to read/write tag information of the IC tag based on the received command, an instruction output unit (108) configured to output a communication instruction to another communication device (20) in response to a first communication result obtained by the first communication processing unit, and a response processing unit (112) configured to generate response information to the control device (1) based on the first communication result and a second communication result obtained by a second communication device.