RFID Network Control Device Antenna Switching Redundancy
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Solution Overview
Problem
Current RFID systems face limitations in precision location tracking of tagged items due to the use of portable readers, which incur high labor costs and lack spatial resolution, while fixed large antennas are unwieldy and inefficient, and existing network control methods are cumbersome and lack redundancy.
Innovation Solution
A RFID network control device with a bypass capability between control ports allows multiple readers to access the same set of antennas, enabling failover and load balancing, and uses a single device to manage RFID traffic signals, reducing cabling and installation complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If portable readers are used for RFID tracking, then mobility and flexibility are improved, but labor costs increase and spatial resolution decreases
Solution Approach 1:
The system divides the RFID network into multiple fixed reader units, each responsible for a specific zone. This segmentation allows the system to maintain fixed installation precision while achieving operational flexibility through distributed architecture, eliminating the need for portable readers and their associated labor costs.
Solution Approach 2:
A centralized network control device acts as an intermediary between multiple fixed readers and the host system. This mediator coordinates reader operations, manages antenna switching, and provides redundancy, enabling the system to achieve both fixed installation precision and operational flexibility without requiring portable equipment.
2Area of stationary object
If fixed large antennas are used, then coverage area is improved, but system complexity and installation difficulty increase
Solution Approach 1:
Instead of using a single large antenna, the system segments the coverage area into multiple zones, each served by a smaller antenna connected to a fixed reader. This segmentation reduces the complexity of individual antenna installations while collectively providing comprehensive coverage through the distributed network architecture.
Solution Approach 2:
The network control device provides multi-functional capabilities including antenna switching, reader coordination, fault detection, and redundancy management. This universal control mechanism simplifies the overall system by consolidating multiple functions into a single intelligent device, reducing installation and operational complexity.
3Reliability
If multiple readers are deployed, then network reliability and redundancy are improved, but cost and device complexity increase
Solution Approach 1:
Multiple readers are merged into a coordinated network under centralized control. The network control device combines the operations of multiple readers, managing antenna sharing and coordinating read operations to eliminate redundant efforts. This merging approach maintains high reliability through redundancy while reducing overall system complexity through centralized intelligence.
Solution Approach 2:
The system uses identical reader units throughout the network, each with the same hardware capabilities. This copying approach simplifies installation and maintenance through standardization, while the network control device manages the redundancy by intelligently assigning tasks to appropriate reader copies, maintaining reliability without proportionally increasing complexity.
4Adaptability or versatility
If portable readers are used, then deployment flexibility is improved, but installation time and labor costs increase
Solution Approach 1:
The system performs preliminary installation by deploying fixed readers and antennas in strategic locations before operation begins. This preliminary action eliminates the need for ongoing portable reader deployment, reducing installation time while maintaining deployment flexibility through the pre-configured network architecture that can be easily expanded or modified.
Data Source
AI summary
In accordance with the preferred embodiment and alternative embodiments of the invention, RFID network control devices (RNCDs) are provided wherein RFID traffic signals from any one of multiple RFID readers may be routed to any of the RFID antennas coupled to the RNCD. Each reader coupled directly or indirectly to the RNCD, either through its own action or the action of the external host controller managing the reader, may issue commands to the RNCD, over the same cable used to carry RFID traffic signals, and cause the RNCD to set its internal switch configuration such that a channel is established for RFID traffic signals between that reader and a particular RFID antenna coupled to the RNCD. This may include commands from the reader or external host controller which place other intervening RNCD units in a bypass state so as to establish the required communications channel with a minimum of signal strength loss.