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OPNET modeling and Simulation of mobile RFID syste
no vote
Application background A mobile RFID system including network domain, node domain and process domain based on OPNET
three-layer modeling mechanism is established to study the effect of anti-collision algorithm and multiple
environmental factors on tag recognition rate. Simulation results show that tag recognition rate of
CFDSE (Coarse-Fine Double Searching-based tag Estimation) method outperforms other three classical
algorithms 3.5%, 5.1%, and 7.2%, respectively. Key Technology Unlike RFID tags with fixed position in static environment, tags move through the reader with a
certain speed and density in mobile environment. Tag recognition rate is influenced by the moving
speed, density and multi-tag anti-collision algorithm. High density and fast speed would result
in tags reading leakage. RFID has been widely used in manufacturing, supply chain management
and logistics since the 1980s as its
majid002 1 0
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Arduino library GSM shielding
4.0
Application background
With this library you can use the Arduino GSM shield to connect on GSM and GPRS networks
The Arduino GSM Shield connects your Arduino to the internet using the
GPRS wireless network. Just plug this module onto your Arduino board,
plug in a SIM card from an operator offering GPRS coverage and follow a
few simple
Key Technology Use this library to make/receive voice calls, to send and receive SMS with the Quectel M10 GSM module.</br>This library also allows you to connect to internet through the GPRS networks. You can either use web Clients and Servers.
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RFID network * adaptive memory tag anti collision
no vote
Application background tag collision arbitration passive RFID tag is an important fast identification method. This paper proposes an adaptive memory label anti-collision protocol, which is an improvement in the query tree protocol. The efficiency of identifying tags that we use is already known to readers about tags. How we evaluate many conflicts can be achieved through the protocol in the query tree protocol. Key technology radio frequency identification (RFID) system is an automatic identification system. The RFID reader identifies the object through wireless communication with the tag and has unique ID information, which is attached to the object. Readers must be able to identify tags as soon as possible. However, the reader or tag signals collide as they communicate in shared wireless channels for rapid identification of interference and collisions. The reader may not know all the objects due to collision. Therefore, an anti-collision protocol which reduces collisions and identifies tags whenever collisions occur is necessary.
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Wireless sensor network based on genetic algorithm
no vote
Application background Recently, a distributed estimation, a type of parameter estimation problem, has been
widely studied from the viewpoint of wireless sensor network (WSN) applications (1) (2).
In particular, distributed estimation has been well-studied for certain WSN applications,
such as environmental monitoring and precision agriculture (3)-(8). In such applications,
measurements are acquired by the combination of a large number of deployed sensors
which are equipped with a radio communication transceiver and a fusion center (FC), Key Technology This chapter describes a distributed estimation technique that uses genetic algorithm (GA) (11)
to optimize the FTDMA which offers high reliability and spectral efficiency and is employed
in severalWSN systems (12) (13) and RFID systems as a multiple access technique (14). Mobile
fusion center based WSN systems that enables ubiquitous physical
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RFID Tag Anti Collision Protocols
no vote
A tag collision problem (or missed reads) in Radio Frequency Identification (RFID) system happens when multiple tags respond to a reader simultaneously. At this time, the reader cannot differentiate these tags correctly. This problem is often seen whenever a large volume of RFID tags are read together in the same radio frequency field. Tag collisions will degrade identification efficiency, and this unreliable identification will compromise the usefulness of RFID system. This chapter introduces tag collision problem and discusses tag anti-collision protocols, including ALOHA-based protocol, Binary Tree (BT) protocol, and Query Tree (QT) protocol. To date, most tag anti-collision protocols are QT protocols. Thus, in this chapter, the authors briefly describe some elegant researches on QT protocols, and also introduce their recent research results on QT protocols
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ESP tutorial original traffic DES by OPNET
no vote
This lesson demonstrates the traffic import function. In this lesson, you will examine a ready-made model that contains several simulations of explicit traffic import conversations on traffic run to understand the effect of traffic growth on the network. In previous tutorials, you manually built a network by dragging objects from the component panel and then adding background load traffic through the specified throughput. This tutorial shows how to import traffic from external sources. You may import the router configuration file or the vneserver database to create the topology, and then create the traffic import data from different tools, such as netscoutngenius, Cisco NetFlow or a custom text file
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State Change Detection in Arduino program
no vote
/*
State change detection (edge detection)
Often, you don't need to know the state of a digital input all the time,
but you just need to know when the input changes from one state to another.
For example, you want to know when a button goes from OFF to ON. This is called
state change detection, or edge detection.
This example shows how to detect when a button or button changes from off to on
and on to off.
The circuit:
* pushbutton attached to pin 2 from +5V
* 10K resistor attached to pin 2 from ground
* LED attached from pin 13 to ground (or use the built-in LED on
most Arduino boards)
created 27 Sep 2005
modified 30 Aug 2011
by Tom Igoe
This example code is in the public domain.
http://arduino.cc/en/Tutorial/ButtonStateChange
*/
// this constant won't change:
const int buttonPin = 2; // the pin that the pushbutton is attached to
const int ledPin = 13; // the pin that the LED is attach
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Adaptive_binary_splitting_RFID_tag_anti-collision
no vote
Tag collision arbitration for passive RFID tags is a significant issue for fast tag identification. This letter presents a novel tag anti-collision scheme called Adaptive Binary Splitting (ABS)
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OPNET Modeling and Optimization Simulation of Mobi
no vote
A mobile RFID system including network domain, node domain and process domain based on OPNET three-layer modeling mechanism is established to study the effect of anti-collision algorithm and multiple environmental factors on tag recognition rate
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RFID Reader & Writer RC522_Library
4.0
Renamed library from RFID to MFRC522 (RFID seemed to generic). Register names changed to comply with datasheet. Global defines moved into class. All constants, functions and parameters are now commented in English. Code refactored, most function names have changed. Now supports ISO-14443-3 anti collission and 4/7/10 byte UIDs (cascade levels). Added functions for MIFARE Classic Decrement/Increment/Restore/Transfer and MIFARE Ultralight Write. New examples written.
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