Near Field Communication (NFC) is the abbreviation of Near Field Communication, that is, short-range wireless communication technology. The so-called Near Field Communication (NFC) technology is a short-distance high-frequency wireless communication technology, with an available distance of about 10 cm, which can realize electronic identification or data transmission, such as credit cards and access cards. In the early days, with the help of this technology, users can use mobile phones to replace contactless smart cards such as bus cards, bank cards, employee cards, access cards and membership cards, and can easily read RFID tag information posted on billboards.
You can understand that this is a way of communication between two devices, and it can be understood as something like Bluetooth, or something like an ordinary bus card or a magnetic card. Of course, this technology is definitely more advanced. To put it simply, if you are a science student, you can understand it this way:
All such wireless communications are protocols for transmitting signals (encoding), receiving signals (decoding), and then information. This NFC operating frequency
13.56 MHz
And compared with Bluetooth, its transmission speed is lower. What are its advantages?
1) No power supply. Unlike Bluetooth headsets, they need to be recharged.
2) Simple work
What is the function of NFC near field communication? 30 points
Near field communication is a communication method on mobile phones, which can be used to swipe cards ~
Encyclopedia explanation:
NFC stands for near-field communication and is a short-range wireless communication technology. Is a short-range high-frequency wireless communication technology, which allows contactless point-to-point data transmission between electronic devices and exchanges data within10cm (3.9 inches). [ 1]
This technology is developed from contactless radio frequency identification (RFID). NFC is a non-contact identification and interconnection technology jointly developed by Philips and Sony, which can carry out short-distance wireless communication between mobile devices, consumer electronics products, PCs and intelligent control components.
Near-field communication is a short-range high-frequency radio technology, which works within 20 cm, the frequency is 13.56 MHz, and the transmission speed is 106 kbit/s, 2 12 kbit/s or 424 kbit/s. At present, near-field communication has passed ISO/IEC IS/KL. NFC adopts active and passive reading modes.
Consumers can use mobile phones that support this technology to swipe their cards in buses, subways and supermarkets. This technology has appeared in Nokia products such as 6 13 1i in earlier years, and has been successfully used in Beijing, Guangzhou and other cities.
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How to use mobile phone near field communication?
Just brush the back of the phone, you need the other party to have nfc function, which is not very practical, similar to Bluetooth function, but advanced.
Telecom's 4g mobile phone is installed with 3g card. What does it mean that the mobile phone prompts that near-field communication is not allowed?
Near field communication refers to nfc function, which has nothing to do with 3g4g.
What is NFC near field communication?
Near Field munication (NFC), also known as short-range wireless communication, is a short-range high-frequency wireless communication technology, which allows non-contact point-to-point data transmission between electronic devices (within ten centimeters) to exchange data. This technology is developed from contactless radio frequency identification (RFID) and is backward compatible with RFID. It was first promoted by Philips, Nokia and Sony, and may be mainly used for handheld devices such as mobile phones. Due to the natural security of near-field communication, NFC technology is considered to have great application prospects in mobile payment and other fields. [1] NFC integrates contactless card reader, contactless card and peer-to-peer functions on one chip, creating countless new opportunities for consumers' lifestyles. This is an open interface platform, which can establish wireless network quickly and actively. It is also a virtual connector, serving existing cellular networks, Bluetooth and wireless 808+05438+0 devices. NFC is compatible with Sony's FeliCaTM card and the widely established contactless smart card architecture, which is based on ISO 14443 A and uses Philips MIFARE? Technology. In order to promote the development and popularization of NFC, Philips, Sony and Nokia set up a non-profit industry association-NFC Forum to promote the implementation and standardization of NFC technology and ensure the cooperation between devices and services. At present, NFC Forum has more than 70 members in the world, including: mastercard international, Panasonic Electronics Industry Co., Ltd., Microsoft, Motorola, NEC, Renesas Technology, Samsung, Texas Instruments Manufacturing Company and Visa International Organization. The world's earliest NFC commercial release: * Germany, Mainz Transport Company (RMV) April, 2006 19, Philips, Nokia, Vodafone and Rhein-Main Verkehrsverbund, the bus network operators in Mainz, Frankfurt, Germany, announced that they had successfully built the embankment for 10 month. At present, Nokia 3220 mobile phone has integrated NFC technology, which can be used as an electronic ticket, or as a discount card for local retail stores and tourist attractions. Now, about 95,000 Hanao residents can enjoy the convenience brought by NFC bus mobile ticketing just by swiping compatible mobile phones.
Edit the technical advantages of this paragraph
Like RFID, NFC information is transmitted through electromagnetic induction coupling in the radio frequency part of the spectrum, but there are still great differences between them. First of all, NFC is a wireless connection technology, which can provide simple, safe and fast communication. Its transmission range is smaller than RFID, which can reach several meters or even dozens of meters. However, due to its unique signal attenuation technology, NFC has the characteristics of short distance, high bandwidth and low energy consumption compared with RFID. Secondly, NFC is compatible with the existing contactless smart card technology and has become a formal standard supported by more and more major manufacturers. Thirdly, NFC is a short-range protocol, which provides simple, safe, fast and automatic communication between various devices. Compared with other connection modes in the wireless world, NFC is a close-range private communication mode. Finally, RFID is more used in production, logistics, tracking and asset management, while NFC plays a huge role in the fields of access control, public transportation and mobile payment. At the same time, NFC is superior to infrared and Bluetooth transmission methods. As a consumer-oriented transaction mechanism, NFC is much faster, more reliable and simpler than infrared, and it doesn't need strict alignment to transmit data like infrared. Compared with Bluetooth, NFC is oriented to close-range transactions and is suitable for exchanging important information such as financial information or sensitive personal information. Bluetooth can make up for the shortage of NFC communication distance and is suitable for long-distance data communication. So NFC and Bluetooth are complementary and coexist. In fact, the fast and lightweight NFC protocol can be used to guide the Bluetooth pairing process between two devices, which promotes the use of Bluetooth. NFC mobile phone has built-in NFC chip, which constitutes a part of RFID module and can be used as RFID passive tag-payment; you can also ......
What does it mean that the telecom mobile phone shows that UIM card does not support near field communication function? How to solve it?
Near field communication refers to nfc function, which is only available when merchants go to telecom companies to handle corresponding business. For example, nfc bus service, if the bus company does not go to telecom to handle this business, then ordinary people can't use it.