RFID Network Distributed Intelligence Mission Scheduling
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Solution Overview
Problem
RFID networks with large numbers of reader devices face limitations in readout rate due to communication network availability and interference issues, leading to inefficient data processing and potential network overload.
Innovation Solution
A distributed system where each RFID system unit operates independently with a mission message from a central controller, including instructions for starting time, antenna selection, and frequency channels, allowing for adaptive and interference-free operation, with intelligent resource management and dynamic scheduling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large number of reader devices operate simultaneously with large sending capacity, then the data processing capability increases, but mutual interferences occur and network load increases
Solution Approach 1:
The controller sends mission messages to reader devices in advance, containing pre-planned instructions for starting time, antenna selection, and frequency channels. This preliminary scheduling prevents mutual interferences before they occur by coordinating reader operations ahead of time, while still allowing multiple readers to operate with high data processing capability.
2Reliability
If a central controller manages all reader devices centrally, then coordination and interference prevention are improved, but communication network load increases
Solution Approach 1:
The control function is segmented between the central controller and individual reader devices. The controller sends mission messages containing coordinated instructions, but each reader device independently executes its own mission and operates autonomously during its operational interval. This segmentation reduces continuous communication network load while maintaining coordination efficiency through pre-planned mission distribution.
3Loss of energy
If reader devices operate independently without central coordination, then communication network load decreases, but interference management and stability deteriorate
Solution Approach 1:
The controller distributes mission messages in advance that contain all necessary coordination information including starting times, antenna selections, and frequency channels. Reader devices then operate independently during their operational intervals using this pre-planned information, reducing communication network load while maintaining network stability through the pre-coordinated mission parameters.
4Object-affected harmful factors
If static synchronization schedules are used, then interference prevention is improved, but network availability requirements increase
Solution Approach 1:
The system uses dynamic mission messages that contain flexible operational parameters including starting times, duration, antenna selection, and frequency channels. Reader devices adapt their operation based on the specific mission parameters received, allowing interference prevention through coordinated scheduling while reducing rigid network availability requirements compared to static synchronization approaches.
Data Source
AI summary
An RFID network, comprising a plurality of RFID read/write devices, which are connected to a central controller via a communication network, has problems as the network size increases. The mutual interference potential on the air interfaces increases, high demands are placed on the communication network with respect to availability, and the efficiency of the controller per RFID write/read device decreases. If part of the resources and the intelligence of the controller are distributed to, or forwarded to, an RFID system unit comprising the RFID read/write device, some of the load is removed from the controller. The RFID system units are notified of the operating sequences to be performed via a mission and said sequences are performed largely synchronously so that the interference potential decreases. Due to the distributed intelligence, the demand with respect to the availability of the communication network likewise decreases and the central controller can provide more resources for processing applications. The RFID network is therefore easier scalable in size and more reliable in operation.