Crystal product launch NFC antenna technology keywords: NFC mobile phones, NFC, wireless communication, non-contact mobile payment summary: at present, based on the non-contact mobile payment application of mobile phone has three mainstream solutions: proposed by manufacturers of philips, SONY and nokia NFC scheme based on mobile phone, chip manufacturers Inside company eNFC solutions and dual interface smart CARDS.
The introduction
with the rapid popularization of mobile phone, data rate, TDD wireless network support has new application especially data business applications, mobile phone become indispensable to people around information terminal.More and more people use mobile phone instead of watch, notebook, MP3, if one day our wallet and keys will give way to mobile phones, make our life more convenient, more secure NFC
NFC (Near Field Communication) technology will make it come true.In June 2006, nokia, philips, and China mobile easypass company in xiamen launched China's first NFC mobile payment experiment [1].Users to use embedded NFC module of the nokia 3220 mobile phone, can be in any xiamen easypass outlets covered (bus, ferry, cinemas, restaurants) for mobile payment.Not only that, in the near future, through the combination of mobile phones and NFC technology, the user through the phone can only implement the following application: on the street concert posters and magazines download location and time schedule;To play in the park, the directional cross-country interactive play [2];Real-time refresh bus arrival time at the station;In the office send SMS control housekeeping waiters in and out of the house of time [3];Replacing existing in school student id card and student card;Across urban intelligent public telephone booth map query, bus lines, food shopping and other information;At a gas station, supermarket, bank where any POS payment with mobile phone charge electronic invoice.
1 technical introduction
NFC is in radio frequency identification (RFID) and Internet technology has evolved on the basis of the fusion of new technology, is a kind of short-range wireless communication technology standard.It used in single chip contactless card reader and contactless smart CARDS and point to point function, running at 13.56 MHz frequency range, can be in the range of about 10 cm to establish the connection between the equipment, the transfer rate of 106 kbit/s, 212 kbit/s, 424 kbit/s, the future can raise to more than 848 kbit/s [4].
NFC terminal has three work modes:
(1) the active mode, the NFC terminal as a card reader, take the initiative to make their rf field to recognize and read/write other NFC device;
(2) passive mode, the NFC terminal can simulate into a card is read/write, it is only in other equipment from the rf field in the passive response;
(3) two-way mode, both sides make a radio frequency (rf) field to establish point-to-point communication.
NFC is used to set up rapidly in short range wireless communication between the various devices that can be used as a kind of virtual connector, it can meet the data exchange between any two wireless devices.It can also through the initialization equipment original bluetooth and 802.11 wireless protocol, can make the equipment in the more distant communication or at a higher rate of data transmission.So in addition to the information transmission, NFC devices can be connected to the world as a security gateway, let the user whether at home or in the mobile, can be stored or receive all sorts of information at any time.As long as two NFC devices, they will automatically start network communication function, users do not need to set the installer separately, so as to realize the non-contact mobile payment of the foregoing, the electronic wallet and id card function such as identification.NFC technology in accordance with the international organization for standardization ISO18092, ISO21481 standard, compatible wireless smart card ISO14443 standard, conforms to the European computer association EMCA - 340, 352 and 356 standard [5].NFC compatible with the cauldron in the field of contactless smart CARDS, philips and SONY get its FeliCa MIFARE technology, based on the smart card has deployed about 1.2 billion pieces of the former, the latter also has deployed about 170 million pieces.The NFC technology fully with the future close by wireless interconnection equipment should have the characteristics of low power, low price, compatibility, and make the NFC become close a highly competitive technology in the field of wireless interconnection.
2 application classification and current situation of
2.1 application classification of NFC technology application can be divided into five categories [6] :
(1) contact through (Touch and Go), such as entrance guard management, tickets and tickets, etc., the user will store the ticket or access equipment near the card reader, also can be used in the logistics management.
(2) contact payments (Touch and Pay), such as non-contact mobile payment, users will be close to the embedded equipment has the NFC module of POS machine can be paid, and confirm the transaction.
(3) contact connection (Touch and Connect), such as the two NFC device connected (as shown in figure 1, cell phones and laptop computers), for point-to-point (Peer - to - Peer) data transmission, for example, download music, pictures etc. [7] each other and exchange my address book.Figure 1 mobile phones and laptop computers NFC point-to-point communication
(4) contact browse (Touch and Explore), the user can be NFC mobile phones connect intelligent public telephone near the street NFC function or posters, to browse the traffic information, etc.
