How does Tap & Share (NFC) works in Smartphones:
Tap & Share shares some pieces of information in some Smartphones like Photos, Contacts, Songs, Videos and etc...hand has become a trend in world of Mobile phones, which was earlier common in form of Bluetooth sharing. You can see it at top of the list of hardware specifications in many smartphones namely Nokia, Samsung, Apple, BB and much more....
I'll try to explain here that how does the Technology NFC (Near field Communication) works behind Tap & Share. How much it is useful, it's advantage/disadvantage and about its future aspects is daily digital life.
As it's name explain about itself, NFC (Near field Communication) works in between very short range up-to 10 Cm only. The both compatible devices should be in proximity to complete tasks of sharing. A full NFC device can work in basically 3 modes, in which "pear to peer" mode is used by smartphones to share data between the short range. In Peer to Peer mode a phone will work in both stats i.e active state when sending data and passive state when receiving data by other device.
NFC works by establish a Radio Communication at Radio Frequency ISM band 13.56 M.Hz. NFC use Electromagnetic induction (Law of Michael Faraday - Magnetic flux change in primary coil induce current in secondary coil.). NFC enabled devices use loop antenna, In the active stat when device send data with sharing make a RF field to induce current in device in its near field to complete its task.
Modified use of the same technology Electromagnetic Induction is common in "Induction Cooker" and "Wireless Charging of Battery of Smartphones" in our daily digital life. I'll further more explain this both common widgets Induction cooker and Wireless Charging in my next posts.
Below are some Advantage/disadvantage and its compression with Bluetooth technology....
- In Bluetooth Technology, both devices should be self powered, but in NFC only Active device use power to read/write data in near field device.
- NFC work in network type Peer to Peer while Bluetooth works as WPAN.
- Range of Bluetooth is wider than NFC. In Bluetooth range is about 100 Meter in class-1 device while in NFC its about up to 10 Cm.
- NFC works on frequency of 13.56 M.Hz while Bluetooth works in (2.4 G.Hz - 5 G. Hz) range.
- NFC use less power consumption.
- Bit rate of NFC 424 Kbit/s while Bluetooth's 2.1 Mbit/s
- NFC is less secure than Bluetooth sharing.