NEAR FIELD COMMUNICATION

Near Filed Communication (NFC) is a close range radio communication protocol which is used for very sensitive applications. It was jointly developed by Sony and Philips. The standard specifies the ways to establish P2P (Peer - to - Peer) communication links for data exchange. After the P2P network has been configured,another wireless communication technology,such as Bluetooth Wi - Fi,can be used for longer range communication or for transferring larger amounts of data. Its development was parallel to RFID (Radio Frequency Identification),but both differ in many ways. NFC offers a very short range as compared to RFID. This is an added advantage in the sense that it requires a very little transmission power and cheap tran smitters can be used for the purpose . Hence it is very suitable for Smartcard like applications. It can also work in both active and passive modes. NFC works on a frequency range of 13.56 MHz It offers a baud rate of 106 kbps to 424 kbps. The transmission is made from a frequency of 13.56 MHz inductively;hence it uses a high magnetic field. At a transmission only the two participants can be involved - one transmitter (initiator) and one receiver (target). The transmission can be either in active fashion or p assive fashion. Both have their own merits and demerits. The NFC transmission runs helping duplex,i.e. that one of the two devices can send only in each case or receive at a time . https://www.ijiert.org/paper-details?paper_id=14074