Near Field Communication Technology

Sudhakar KumarSchool of Electronics & Communication Engineering

Shri Mata Vaishno Devi UniversityKatra – 182 320, Jammu & Kashmir, INDIA

What is NFC Technology?

• A short-range radio technology that operates on the 13.56 MHzfrequency, with data transfers of up to 424 kilobits per second.

• NFC communication is triggered when two NFC-compatible de-vices are brought within proximity, around four centimeters.

Operation of NFC

1. Based on Inductive coupling

2. Magnetic Induction between two loop antennas [located withineach other’s near field ]

3. An initiator and a target

Modes of Operation

1. Active Mode

2. Passive Mode

Active Mode

Passive Mode

Modes in NFC

1. Read/ Write Mode.

2. Peer to Peer Mode

3. Card Emulation Mode

Applications of NFC

1. Touch and Go.

2. Touch and Confirm

3. Touch and Connect

Touch and Go

Touch and Confirm

Touch and Connect

How do the Delhi Metro cards and tokens work?

• Delhi Metro tokens and cards have an NFC tag inside whichallows the exit machines to read/write data on it.

• The communication used at Metro Exit Gates is ‘Active-PassivePeer Interaction’.

• The transmission frequency used in Delhi Metro is 13.56 MHzand data transfer takes place at 212 kbps.

Inner view of Metro Card

Comparison with Existing Technologies

Advantages of NFC

1. Highly convenient from users’ perspective

2. Secure Communication

3. No manual configuration and settings

4. No search and pair procedure [inquiry and inquiry scan inBluetooth]

Limitations of NFC

1. Short range operation

2. Low data transfer rate [in kbps ]

Devices exploiting NFC technology

1. Samsung Galaxy S II

2. Google Nexus 7

3. Nokia 6212 Classic

NFC Task Launcher

1. Task launcher is a great way to bring the benefits of NFC intodaily life.

2. Whether the tag turns our phones to silent when we get homefrom work or turns on our Bluetooth as we get into the car, theoptions are limitless.

3. Some phones have some task launcher functions built in.

Related Work

• The MIT Mobile Experience Laboratory demonstrates severalreal-world uses of NFC in phones, including making paymentsand pairing devices for peer-to-peer games [1].

• Johnson’s Control is exploiting NFC in monitoring data centers[2].

• Bump Technologies has built an API to support communicationbetween two devices after they’ve “bumped” together [3].

References

[1 ] MIT Mobile Experience Lab. A day at mit with near-field communication.http://techtv.mit.edu/videos/1369-a-day-atmit-with-near-field-communication.

[2 ] Online Available:http://www.johnsoncontrols.com/content/dam/WWW/jci/be/solutions for your/datacenter/Modular%20Data%20Center%20Brochure.pdf

[3 ] Bump technologies. [Online] Available: http://bu.mp.

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