What’s best for your new solution: NFC, Bluetooth or RFID?

Techno Crates#, #, #
Introduction

A white paper is an article that states an organization’s position or philosophy about a social, political, or other subject, or a not-too-detailed technical explanation of an architecture, framework, or product technology. Typically, a white paper explains the results, conclusions, or construction resulting from some organized committee or research collaboration or design and development effort.

Our topic is “What’s best for your new solution: NFC, Bluetooth or RFID?”

So we will discuss NFC, Bluetooth and RFID one by one and then compare them to conclude what’s best.

RFID (Radio Frequency Identification)

RFID stands for Radio-Frequency IDentification. The acronym refers to small electronic devices that consist of a small chip and an antenna. The chip typically is capable of carrying 2,000 bytes of data or less.

RFID devices use radio frequency waves to communicate. The common method used to identify person/object is to use serial number for each tags. Other information can also be customized as per the requirement.

Fig : RFID Chip

How RFID Works ?

Fig – How RFID Work ?

The RFID tag usually will have smaller micro-chip along with the antenna. The RFID tags communicate with the reader with the help of antenna. The reader converts reflected or transmitted information from tags to useful digital information which can be further processed by software running in the computer. RFID works on different frequency bands, mainly in UHF frequency range. The below figure show the small chip of RFID

RFID Applications (uses)

Fig : RFID Application(Uses)

The above fig. shows that RFID technology is used almost in everywhere in our daily life.

Common Problems with RFID
  • Reader collision

  • Tag collision

Reader collision occurs when the signals from two or more readers overlap. Tag collision occurs when many tags are present in a small area; but since the read time is very fast, it is easier for vendors to develop systems that ensure that tags respond one at a time.

NFC (Near Field Communication)

NFC is a short-range high frequency wireless communication technology that enables the exchange of data between devices over about a 10 cm distance.

NFC is an upgrade of the existing proximity card standard ( RFID ) that combines the interface of a smartcard and a reader into a single device. It allows users to seamlessly share content between digital devices, pay bills wirelessly or even use their cellphone as an electronic traveling ticket on existing contactless infrastructure already in use for public transportation

How NFC Works ?

NFC requires at least one transmitting device, and another to receive the signal. There are three operational modes in NFC technology as shown in below fig –

NFC Applications (uses)

Fig : NFC Application(Uses)

The above fig. shows that NFC devices are used in contactless payment systems, similar to those used in credit cards and electronic ticket smartcards and allow mobile payment to replace/supplement these systems. NFC is used for social networking for sharing contacts, photos, videos or files.

Common Problems with NFC
  • Data Corruption and Manipulation

  • Theft

  • Interception Attacks

  • Eavesdropping

Bluetooth

Bluetooth is a global wireless communication standard that connects devices together over a certain distance. Think headset and phone, speaker and PC, basketball to smartphone and more. It is built into billions of products on the market today and connects the Internet of Things (IoT).

How Bluetooth Works ?

A Bluetooth device uses radio waves instead of wires or cables to connect to a phone or computer. The Bluetooth standard is based upon a master/slave operational mode. A piconet is a network of devices connected using Bluetooth technology. The network ranges from two to eight connected devices. When a network is established, one device takes the role of the master while all the other devices act as slaves. Piconets are established dynamically and automatically as Bluetooth devices enter and leave radio proximity.

Bluetooth applications (uses)

Fig : Bluetooth Application(Uses)

The above fig. shows that Bluetooth products are used in PC, mobiles, cars, health cares, entertainment devices, i.e today bluetooth is used almost everywhere in our daily life.

Common Problems with Bluetooth
  • Make sure Bluetooth is turned on

  • Determine which pairing process your device employs

  • Turn on discoverable mode

  • Make sure the two devices are in close enough proximity to one another

  • Power the devices off and back on

  • Power down likely interferers

  • Charge up both devices you’re trying to pair

  • Delete a device from a phone and rediscover it

  • Get away from the Wi-Fi router

Comparison With Existing Technologies

The table below shows the basic comparison between these technologies –

We can see difference between these device in the image below-

Conclusion

Every technology has it places for itself. NFC can be called as the next generation of RFID as technically its working principle is based on RFID however from application point of view it is similar to Bluetooth in some ways since it allows communication between two active devices.

Bluetooth is an old technology for data transfer and is widely available in all phones now days, you can also found computer accessories like Bluetooth mouse, speaker and keyboard etc. Whereas NFC is relatively new technology and can used for data transfer as well but since it has less speed than Bluetooth and no pairing require, it is better to use it to transfer small files like images and link to webpages.

Using NFC tags, we can make life much easier. They can be used for small automation tasks like turning WiFi ON/OFF by simply taping the tags on the phone. NFC technology are also used for making payments for products, by holding the phone close to a reader terminal.

NFC technology is not yet popular like Bluetooth but with more NFC phones in the market. We will soon see more of this in future.