What does near field communication mean?

Near field communication (NFC) is the abbreviation of Near Field munication, which is short-range wireless communication technology. The so-called near field communication (NFC) technology is a short-range, high-frequency wireless communication technology with a usable distance of about 10 centimeters, which can realize electronic identification or data transmission, such as credit cards, access cards and other functions. With the early use of this technology, users can use their mobile phones to replace contactless smart cards such as bus cards, bank cards, employee cards, access control cards, membership cards, etc., and can also easily read RFID tag information attached to billboards.

You can understand that this is a communication method between two devices. It can be understood as a technology similar to Bluetooth, or similar to common bus cards and magnetic cards. Of course, this technology is definitely more advanced. To put it simply, if you are a science and engineering 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

is 13.56 MHz

And compared to Bluetooth, its transmission speed is even lower. So what are its advantages?

1) No power supply required. Unlike Bluetooth headsets, which need to be charged

2) The work is simple

What is the function of NFC? 30 minutes

Near field communication is a mobile phone A communication method on the Internet that can be used to swipe cards~

Explanation on the encyclopedia:

NFC is the abbreviation of Near Field munication, which is short-range wireless communication technology. It is a short-distance high-frequency wireless communication technology that allows contactless point-to-point data transmission between electronic devices, exchanging data within ten centimeters (3.9 inches). [1]

This technology evolved from contact-free radio frequency identification (RFID). NFC, jointly developed by Philips and Sony, is a contactless identification and interconnection technology that can Enables short-range wireless communications between mobile devices, consumer electronics, PCs, and smart control component tools.

Near field communication is a short-range, high-frequency radio technology that operates at a frequency of 13.56MHz within a distance of 20 centimeters. Its transmission speeds are 106Kbit/sec, 212Kbit/sec or 424Kbit/sec. At present, near field communication has passed the ISO/IEC IS 18092 international standard, the E-order CA-340 standard and the ETSI TS 102 190 standard. NFC uses two reading modes: active and passive.

Consumers can use mobile phones that support this technology to swipe their cards for consumption in buses, subways, and supermarkets. This technology has appeared in products such as Nokia 6131i in the early years, and has been successful in cities such as Beijing, Guangzhou, and Xiamen. Use precedent.

baike.baidu/view/4859302

How to use near field communication on mobile phones?

Just swipe the back of the phone. It requires the other party to also have NFC function. It is not very practical. It is similar to Bluetooth function, but it needs to be more advanced.

Telecom 4G mobile phone installs 3G card mobile phone What does it mean when it says that near field communication is not possible?

Near field communication refers to the nfc function, which has nothing to do with 3g4g

What is NFC near field communication

Near Field Communication (NFC), Also known as short-range wireless communication, it is a short-distance high-frequency wireless communication technology that allows contactless point-to-point data transmission (within ten centimeters) between electronic devices to exchange data. This technology evolved from contact-free radio frequency identification (RFID) and is downwardly compatible with RFID. It was first promoted by Philips, Nokia and Sony, and may be mainly used in 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 fields such as mobile payment. [1] NFC integrates contactless card readers, contactless cards and peer-to-peer functions into a single chip, opening up countless new opportunities for consumers' lifestyles.

It is an open interface platform that enables fast, proactive configuration of wireless networks and a virtual connector for existing cellular, Bluetooth and wireless 802.11 devices. NFC is compatible with Sony's FeliCa? 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 established a non-profit industry association, the NFC Forum, to promote the implementation and standardization of NFC technology and ensure collaboration between devices and services. Currently, the NFC Forum has more than 70 members around the world, including: MasterCard International, Panasonic Electronics Industries Co., Ltd., Microsoft Corporation, Motorola Corporation, NEC Corporation, Renesas Technology Corporation, Samsung Corporation, Texas Instruments Manufacturing Company and Visa International Organization . The world's earliest commercial release of NFC: * Germany, Mainz Transport Company (RMV) On April 19, 2006, Philips, Nokia, Vodafone and the bus network operator Mainz Transport Company in Frankfurt, Germany (Rhein-Main Verkehrsverbund) announced that after a successful 10-month field trial, Near Field Communication (NFC) technology is about to be put into commercial use. Currently, the Nokia 3220 mobile phone has integrated NFC technology, which can be used as an electronic ticket and can also be used as a discount loyalty card at local retail stores and tourist attractions. Around 95,000 residents of the city of Hanau can now enjoy the convenience of NFC-based mobile bus ticketing with just a simple swipe of a compatible mobile phone.

Edit this section Technical Advantages

Like RFID, NFC information is also transmitted through electromagnetic induction coupling in the wireless frequency part of the spectrum, but there is still a big difference between the two. . First of all, NFC is a wireless connection technology that provides easy, safe, and fast communication. Its transmission range is smaller than RFID. The transmission range of RFID can reach several meters or even dozens of meters. However, due to NFC's unique signal attenuation technology, , Compared with RFID, NFC has the characteristics of short distance, high bandwidth, and low energy consumption. Secondly, NFC is compatible with existing contactless smart card technology and has become a formal standard supported by more and more major manufacturers. Thirdly, NFC is also a short-range connection protocol that provides easy, safe, fast and automatic communication between various devices. Compared with other connection methods in the wireless world, NFC is a close-range private communication method. Finally, RFID is more commonly used in production, logistics, tracking, and asset management, while NFC plays a huge role in access control, public transportation, mobile payment and other fields. At the same time, NFC is also superior to infrared and Bluetooth transmission methods. As a consumer-oriented transaction mechanism, NFC is faster, more reliable and much simpler than infrared. It does not require strict alignment to transmit data like infrared. Compared with Bluetooth, NFC is oriented to short-distance transactions and is suitable for exchanging important information such as financial information or sensitive personal information; Bluetooth can make up for the shortcomings of NFC communication distance and is suitable for longer-distance data communication. Therefore, NFC and Bluetooth complement each other and coexist. In fact, the fast and lightweight NFC protocol can be used to guide the Bluetooth pairing process between two devices, promoting the use of Bluetooth. NFC mobile phones have built-in NFC chips, which form part of the RFID module. They can be used as RFID passive tags - used to pay fees; they can also be used as...

Telecom mobile phones display UIM What does it mean that the card does not support near field communication function? How to solve it?

Near field communication refers to the nfc function, which requires merchants to go to the telecommunications company to handle the corresponding business. For example, NFC bus service, if the bus company does not go to Telecom to handle this service, then ordinary people will not be able to use it.