Data Processing Subsystem And Rfids Computer Science Essay


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Radio Frequency communication happens with the occurrence of data transfer over electromagnetic waves. In RFID system, the tagged data of the object stored in an RFID tag generates a signal which contains the particular information is read by an RFID reader which passes this information to a processor for the purpose of processing the obtained information for a required application. The RFID system can be considered a sum the following components:

The tags can be passive or active. Active tags have on-chip power while passive tags use power induced by the RFID reader's magnetic field. This makes passive tags cheaper but with lower range compared to active tags. The RFID reader has a decoder that send periodic signals to inquire about any tag in vicinity, an antenna and a transceiver. Upon receiving any signal from a tag it passes on the particular information to data processor.

Describe what you think would be the architecture of Internet of things

RFID's allow computers to monitor and to take decision or action without the human factor. RFID system consists of the following:


The tag contains an antenna and a microchip. The tags activate when within the interrogator's reading zone. The 3 types are: Read Only, Read/Write and Write Once Read Many tag. The size of the tag used is based on the antenna size.

Interrogator or RFID reader

The reader's configuration depends on specific application and is optimized to tag read rates. Portals, arrays and tunnels constitute typical configuration. Enhanced power limits can be achieved by optimizing radiated signal in a focused manner allowing more reliability. Multiple items can be read by a single reader simultaneously.


It's the interface between the existing company databases and information management software and the interrogator.

The RFID tag has a wireless transducer, an antenna and an encapsulating material. The tags can be active or passive. An RFID reader consists of an antenna, transceiver and decoder that send signals to inquire for any tag in the locality and passes on that information to data processor. The data processing system provides the means of storing the processed data. Frequency range also differentiates RFID systems. The common ranges are low frequency, high frequency and ultra high frequency. The low frequency systems have short reading ranges and lower system costs and are widely used in security systems, animal identification. High frequency systems are used in automated toll systems and railroad tracking.

Show/Describe how nodes on this internet could interact with each other

In order to arrive at mobility, and network resilience the Internet of Things requires self scaling and self organizing network. Objects can identify themselves and be able to locate other objects and to have communication paths to them using naming and addressing strategy. Internet Description Language or XML would be needed since it a heterogeneous network. Application programming interfaces offered by a consistent set of middleware, communication and other services to application will simplify the creation. Traffic and congestion management must be incorporated by Internet of Things. This will detect overflow and also allow reservation of resources for critical data flows. Real time resolution must be supported by the networks. Also Internet of Things would need error management.

How would routing look like end-to-end?

The intention is to allow computers to sense product movement automatically and make decision as to which enterprise application is to be notified and which transaction to be generated. Radio waves are used to accomplish this. An RFID system consists of a tag, a reader and an antenna. RFID tags transfer data to the reader using an integrated circuit and an antenna. The reader converts the radio waves to a usable data. This data is transferred to a host computer system, and is stored in a database to be analyzed later. The scanning antennas can either be fixed or handheld. The RFID tag detects signal from the antenna when passed through of scanning antennas. This wakes the RFID chip which transmits information on its microchip to be picked by scanning antenna.

What nodes can be on the internet?

Sensor nodes join internet and use it to collaborate and accomplish their tasks in Wireless Sensor Networks. Australia has developed a new radio system that transforms the vehicles on the street into nodes on a network. Cars can communicate their respective location to a central location using the combination of GPS and Wi-Fi and also enables them to communicate with each other.

Explain with an example how an item and how it will be connected

Radio-frequency identification or RFID can be used to track humans, animals or products sold at a store. A RFID tag is integrated into a product can be interpreted from several miles away. These tags consist of two parts: a circuit used to save and handle information, modulating and demodulating RF signal and an antenna to accept and transmit RF signal. For example, we could have RFID tags incorporated into golf balls so that they could be retrieved from the golf course. The RFID tags could be implanted into soldiers which could help in rescue missions.

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