WO2011134259A1

WO2011134259A1 - Method and system for transmitting electronic certificate, point of sale machine and near field communication terminal based on near field communication

Info

Publication number: WO2011134259A1
Application number: PCT/CN2010/079201
Authority: WO
Inventors: 牛兴林; 陈小波; 张磊
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-04-29
Filing date: 2010-11-26
Publication date: 2011-11-03
Also published as: CN101867396A

Abstract

A method and system for transmitting electronic certificate, a point of sale(POS) machine and a near field communication (NFC) terminal based on NFC are disclosed in the present invention. The method includes that: a corresponding electronic certificate is generated by the POS machine according to payment information of the NFC terminal (S402); a point-to-point communication link is established by the POS machine and the NFC terminal (S404); and the electronic certificate is transmitted to the NFC terminal by the POS machine via the point-to-point communication link (S406). The present invention solves the problem that the user is inconvenient in using the consumer certificate, and provides convenience to the client to conserve and reimburse the paper, and therefore the electronic payment system is more perfect and convenient in use.

Description

NFC-based electronic voucher transmission method and system,

The present invention provides a field of NFC near field communication, and in particular, relates to a method and system for transmitting electronic voucher based on Near Field Communication (NFC), and POS ( Point of Sales, point of sale machine and NFC terminal. BACKGROUND With the rapid popularization of mobile phones, the uplink and downlink data rates supported by wireless networks are continuously increasing, and new applications, especially data services, are emerging, and mobile phones have become indispensable information terminals around people. More and more people use mobile phones instead of watches, notepads, MP3s. Will one day our wallets and keys also give way to mobile phones, making our lives more convenient and safer? Near Field Communication (NFC) technology will make this a reality. In June 2006, Nokia and China Mobile, Philips and E-Tongka launched the first NFC mobile payment trial in China. Users can use the Nokia 3220 mobile phone with built-in NFC module to make mobile payment at any business outlet in Xiamen (bus, ferry, cinema, fast food restaurant). Not only that, but in the near future, through the combination of mobile phones and NFC technology, users can realize the following applications only by using mobile phones: Download concert time and place schedules on magazines and magazines; play interactive games in the park Directional off-road game; refresh the arrival time of the bus in real time at the station; send text messages in the office to control the time of the housekeeping staff entering and leaving the house; fully replace the existing student ID card and student card in the school; check the map in the smart public phone booths all over the city , bus lines, food and beverage shopping, etc.; pay at the gas station, supermarket, bank where there is a POS machine and use the mobile phone to receive electronic invoices.

NFC is a new technology based on the integration of radio frequency identification (RFID) and interconnection technologies. It is a short-range wireless communication technology standard. It integrates a contactless card reader, a contactless smart card and a point-to-point function on a single chip. It operates in the frequency range of 13.56MHz and can establish a connection between devices in a range of approximately 10cm. The transmission rate can be 106kbit. /s, 212kbit/s and 424kbit/s can be increased to 848kbit/s or more in the future. The NFC terminal has three working modes: (1) In the active mode, the NFC terminal acts as a card reader and actively sends out its own RF field to identify and read/write other NFC devices; (2) In the passive mode, the NFC terminal can simulate A card is read/written, it only passively responds in the RF field emitted by other devices; (3) In the two-way mode, both parties actively send out the RF field to establish peer-to-peer communication.

NFC is used to quickly establish wireless communication between various devices over a short distance. It can be used as a virtual connector to exchange data between any two wireless devices. It also enables devices to communicate over longer distances or transmit data at higher rates by initializing the device's native Bluetooth and 802.11 wireless protocols. Therefore, in addition to information transmission, NFC devices can serve as a secure gateway in the connected world, allowing users to store or receive various information at any time, whether at home or on the move. As long as the two NFC devices are brought together, they will automatically start the network communication function, and the user does not need to set the installation program separately, thereby implementing the aforementioned electronic contact and identity card functions such as contactless mobile payment and identification.

The NFC technology complies with the ISO18092 and ISO21481 standards of the International Organization for Standardization and is compatible with the wireless smart card ISO14443 standard and complies with the European Computer Society's EMCA-340, 352 and 356 standards.

NFC is compatible with the two strongest in the field of contactless smart cards. Philips' MIFARE technology and Sony's

FeliCa technology, based on the former smart card has deployed about 1.2 billion, the latter has also deployed about 170 million. This makes NFC technology fully equipped with the low power, low price and compatibility characteristics of future short-range wireless interconnection equipment, making NFC a highly competitive technology in the field of short-range wireless interconnection. E-wallets can replace existing credit cards and are more convenient to use than credit cards. Usually when we use credit cards for consumption, after the POS terminal deducts our money, it will print out a list of lists, some directly as an invoice that can be reimbursed; Imagine every supermarket will have a POS machine, large There will be several or even more than 10 POS machines in the supermarket. There will be tens of thousands of supermarkets in a city. The number of POS machines in the whole country is huge. These POS machines are constantly printing out consumer bills. It is a very large consumption. If you can save these papers, you will cut down a lot of trees and even a lot of forests. However, the inventors have found that there is no electronic voucher corresponding to electronic consumption and a method of transmitting electronic voucher in the related art, so that the user still needs to carry a large amount of paper consumption voucher after the electronic payment, thereby bringing the user Very inconvenient, it also wastes a lot of paper resources. SUMMARY OF THE INVENTION The present invention has been made in view of the problem of inconvenience of a user in using the vouchers in the related art. To this end, the main object of the present invention is to provide a method and system for transmitting an electronic voucher based on NFC, a POS machine, and an NFC terminal. In order to achieve the above object, according to an aspect of the present invention, a method for transmitting an electronic voucher based on NFC is provided, which includes: a point-of-sale POS machine generates a corresponding electronic voucher according to payment information of an NFC terminal; The machine establishes a point-to-point communication link with the NFC terminal; the POS transmits the electronic voucher to the NFC terminal through a point-to-point communication link.

The POS machine establishes a point-to-point communication link with the NFC terminal, including: the NFC terminal and the POS machine initiate a point-to-point application; the point-to-point application of the NFC terminal and the point-to-point application of the POS machine establish a point-to-point communication link through a handshake protocol.

The POS machine transmits the electronic voucher to the NFC terminal through a point-to-point communication link, including: The POS machine transmits the electronic voucher to the NFC terminal in a file form through a point-to-point communication link. After the POS machine transmits the electronic voucher to the NFC terminal through the point-to-point communication link, the method further includes: the NFC terminal manages the electronic voucher.

The NFC terminal manages the electronic voucher including at least one of the following: querying the authenticity of the electronic voucher; saving the electronic voucher; sorting and searching the saved electronic voucher. In order to achieve the above object, according to another aspect of the present invention, a POS machine is provided, comprising: a generating module configured to generate a corresponding electronic credential according to payment information of an NFC terminal; and an establishing module configured to establish a point-to-point with the NFC terminal a communication link; a transmission module configured to transmit an electronic credential to the NFC terminal over a point-to-point communication link. The above POS machine further includes: a storage module, configured to save the electronic voucher in the form of a file. In order to achieve the above object, according to still another aspect of the present invention, an NFC terminal is provided, comprising: an establishing module configured to establish a point-to-point communication link with a POS machine; and a receiving module configured to receive a POS machine through a point-to-point communication link An electronic voucher sent as a file.

The NFC terminal further includes: an electronic voucher management module, configured to manage the electronic voucher, wherein the management comprises at least one of the following: querying the true H of the electronic voucher to save the electronic voucher; sorting and searching the saved electronic voucher. In order to achieve the above object, according to still another aspect of the present invention, a NFC-based electronic voucher transmission system is provided, including: a POS machine and an NFC terminal, wherein the POS machine includes: a generation module, configured to be based on NFC The payment information of the terminal generates a corresponding electronic voucher; the first establishing module is configured to establish a point-to-point communication link with the NFC terminal; the transmission module is configured to transmit the electronic voucher to the NFC terminal through the point-to-point communication link; and the NFC terminal comprises: The establishing module is configured to establish a point-to-point communication link with the POS machine; and the receiving module is configured to receive the electronic credential sent by the POS machine as a file through the point-to-point communication link. The invention has the following beneficial effects: The POS machine of the invention generates the corresponding electronic voucher according to the payment information of the NFC terminal, and transmits the electronic voucher to the NFC terminal through the point-to-point communication mode, thereby saving paper and facilitating the customer. The preservation and reimbursement of invoices makes the electronic payment system more complete and convenient. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a transmission system of an electronic voucher based on near field communication NFC according to an embodiment of the present invention; FIG. 2 is a schematic diagram showing a preferred hardware structure of an NFC terminal according to an embodiment of the present invention; A preferred schematic diagram of a software module of an NFC terminal according to an embodiment of the present invention; FIG. 4 is a flowchart of a method for transmitting an electronic voucher based on near field communication NFC according to an embodiment of the present invention; FIG. 5 is an electronic wallet according to an embodiment of the present invention. Preferred Flowchart of Payment Method; Figure 6 is a preferred flow chart of a method of transmitting an electronic invoice in accordance with an embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. 1 is a schematic diagram of a transmission system of an electronic voucher based on near field communication NFC according to an embodiment of the present invention. As shown in FIG. 1, the transmission system includes a POS machine 102 and an NFC terminal 104. Further, the POS machine 102 includes: a generating module 1021, a first establishing module 1022, and a transmitting module 1023. The NFC terminal 104 includes: a second establishing module 1041 and a receiving module 1042. In the working state, the generating module 1021 generates payment corresponding information in the payment information of the NFC terminal 104. Then, the first establishing module 1022 starts the P2P (Peer to Peer) application of the POS machine 102, and the second establishing module 1041 starts the Ρ2Ρ application of the NFC terminal 104, and the first establishing module 1022 and the second establishing module 1041 A point-to-point communication link is established between the POS machine 102 and the NFC terminal 104 by a handshake protocol. The transmission module 1023 then transmits the electronic voucher to the receiving module 1042 of the NFC terminal 104 via the point-to-point communication link described above. According to the prior art, after the electronic payment is completed by the NFC terminal and the POS machine, the user can only obtain the paper invoice, thereby causing inconvenience of carrying and waste of paper. The POS machine of the embodiment of the present invention generates the corresponding electronic voucher according to the payment information of the NFC terminal, and transmits the electronic voucher to the NFC terminal through the peer-to-peer communication method, thereby saving paper and facilitating the customer to save the invoice. And reimbursement, making the electronic payment system more complete and more powerful. Further, in the embodiment of the present invention, file transfer can be implemented between the POS machine 102 and the NFC terminal 104 through the underlying protocol of the ,2Ρ, whereas in the prior art, when the electronic payment is made, the NFC terminal operates in the passive mode. It can be regarded as two non-equivalent communication entities with the POS machine, so that only less data and instructions can be transmitted. Preferably, the POS machine 102 can further include a storage module 1024 configured to save the electronic credential in the form of a file. Preferably, in the embodiment of the present invention, the electronic voucher includes: an electronic invoice. Preferably, the NFC terminal 104 may further include: an electronic voucher management module 1043 configured to manage the received electronic voucher. Preferably, the step of managing the electronic voucher by the electronic voucher management module 1043 comprises at least one of: querying the authenticity of the electronic voucher to save the electronic voucher; sorting and searching the saved electronic voucher. In the embodiment of the present invention, the electronic voucher is managed by the NFC terminal, which facilitates the user to save and reimburse the electronic invoice, thereby making the electronic payment system more perfect and convenient. The embodiment of the present invention further describes and protects the POS device 102 and the NFC terminal 104 in the foregoing embodiment, and the constituent modules and workflows of the POS device 102 and the NFC terminal 104 are the same as those in the above system embodiment, and will not be described again in jt. The preferred hardware structure of the NFC terminal of the embodiment of the present invention is described below. 2 is a schematic diagram showing a preferred hardware structure of an NFC terminal according to an embodiment of the present invention. As shown in FIG. 2, the NFC terminal in the embodiment of the present invention includes: a baseband chip 202, a SIM card 204, and an NFC chip 206. In the working state, the control of the baseband chip 202 and the SIM card 204 to the NFC chip 206 is in the same position, and the driver of the baseband chip 202 and the NFC chip 206 communicate through a communication protocol such as Uart\I2C\SPI, and the SIM card The 204 and the NFC chip 206 can communicate via the SWP single-wire protocol. The SWP (Single Wire Protocol) is a C6-pin-based single-wire connection scheme proposed by Gemalto. In the SWP scheme, the interface interface includes three lines: VCC (Cl), GND (C5), and SWP (C6), where the SWP--signal line realizes full-duplex communication based on voltage and load modulation principles, so that SIM can be realized. The card supports both the 7816 and SWP interfaces under the ISO7816 interface definition and reserves the pin for extending the third high-speed (USB) interface. The SIM card supporting SWP must support both ISO7816 and SWP. The COS that requires SIM is a multi-tasking OS system, and these two parts need to be managed independently. The transmitted on the SWP line will be a quasi-digital signal. A specific receiving and demodulating circuit is required, and the signal has a slightly lower noise margin. The baud rate of SWP transmission can be increased from 106KBPS to 2MBPS. From the definition of SWP, SWP scheme satisfies both ISO7816, NFC and high-capacity high-speed interfaces, and is full-duplex communication, which can achieve higher baud rate. The SWP systematically defines a multi-layer protocol from the physical layer, the link layer to the application layer, and has risen to the standard of ETSI. In this embodiment, the NFC chip 206 functions as an NFC near field communication module, which supports near field communication, and needs to support NFC international standards and HCI, SWP international specifications, support card simulation, reader, peer-to-peer application modes. The NFC terminal of the embodiment supports the shutdown and power-off card swiping, that is, the flash card consumption of the electronic wallet is supported when the battery power is low and the battery is turned off, and the battery power is not used. 3 is a preferred schematic diagram of a software module of an NFC terminal in accordance with an embodiment of the present invention. As shown in FIG. 3, the software module of the NFC terminal includes: an electronic invoice management module 302, a SIM card management module 304, a P2P application module 306, an NFC horsepower module 308, and an electronic 4 packet module 310. NFC Horse District The mobile module 312, the NFC chip 314, the SIM card 316, and the handset side software 318. The electronic invoice management module 302 is mainly responsible for: management of electronic invoices, such as sorting of invoices, searching, viewing, inquiring about the subsequent 4 credit sales processing, deletion of useless invoices, and the like.

The P2P application module 306 is mainly responsible for: point-to-point communication between the NFC mobile terminal and the POS machine, receiving the electronic invoice data transmitted from the POS machine, and transmitting the electronic invoice to the electronic invoice management module, so that the electronic invoice management module receives the subsequent management. jobs.

The NFC driver module 308 is mainly responsible for: communication protocol processing between the baseband chip and the NFC chip.

The startup of the P2P application relies on the transaction completion event sent by the SIM to the NFC chip 314 via the SWP. Through this event, the NFC driver will call the callback function of this event to activate the P2P application by sending a message in the callback function.

The SIM card management module 304 is mainly responsible for: communication management between the mobile phone and the SIM, and viewing the related business of the electronic wallet through the STK. The electronic 4 pack module 310 is installed on the SIM card 316, and is mainly responsible for: 4 pack management, such as consumption record inquiry, balance inquiry, consumption limit setting, recharge, menu entry password setting, and the like. 4 is a flow chart of a method of transmitting a near-field communication NFC-based electronic voucher according to an embodiment of the present invention. As shown in FIG. 4, the NFC-based electronic voucher transmission method includes the following steps:

S402, the POS machine generates a corresponding electronic voucher according to the payment information of the NFC terminal;

S404, the POS machine establishes a point-to-point communication link with the NFC terminal;

S406. The POS machine transmits the electronic voucher to the NFC terminal through a point-to-point communication link. The POS machine according to the embodiment of the present invention generates a corresponding electronic voucher according to the payment information of the NFC terminal, and transmits the electronic voucher to the NFC terminal through a point-to-point communication method, thereby saving paper and facilitating the customer to save the invoice. Reimbursement makes the electronic payment system more complete and more powerful. Preferably, the step of establishing a point-to-point communication link between the POS machine and the NFC terminal comprises: starting the point-to-point application by the NFC terminal and the POS machine; and applying the point-to-point application of the NFC terminal The point-to-point application of the POS machine establishes the point-to-point communication link through a handshake protocol. In the embodiment of the present invention, file transfer can be implemented between the POS machine and the NFC terminal through the underlying protocol of the P2P. In the prior art, when the electronic payment is performed, the NFC terminal works in the passive mode, and the POS machine can It is treated as two unequal communication entities, so that only a small amount of data and instructions can be transmitted. Preferably, the POS machine transmitting the electronic credential to the NFC terminal by using the point-to-point communication link comprises: transmitting, by the POS machine, the electronic credential to the NFC terminal. Preferably, after the POS machine transmits the electronic voucher to the NFC terminal through the point-to-point communication link, the NFC terminal manages the electronic voucher. Preferably, the step of managing the electronic voucher by the NFC terminal comprises at least one of: querying the authenticity of the electronic voucher to save the electronic voucher; sorting and searching the saved electronic voucher. Through the further management of the electronic voucher, the customer can save and reimburse the invoice, making the electronic payment system more perfect and convenient. Preferably, in the embodiment of the present invention, the electronic voucher may be an electronic invoice. FIG. 5 is a preferred flowchart of an electronic wallet payment method according to an embodiment of the present invention. As shown in FIG. 5, the electronic 4 packet payment method mainly includes the following steps:

S502, scanning the product, inputting the product name, price, quantity, and the like into the shopping management system;

S504, the shopping management system transmits the shopping information to the POS terminal;

S506, the POS machine terminal processes the received shopping information, forms an electronic invoice, and displays a credit card;

S508, the user uses the NFC terminal equipped with the electronic wallet to approach the POS machine to perform the card swiping;

S510, the POS machine reads the information of the electronic wallet, and performs deduction. After the deduction is completed, the point-to-point application is started, and the electronic invoice is sent;

S512, the NFC terminal receives the transaction completion event of the SIM card, and then starts the peer-to-peer application, and reads the electronic invoice from the POS machine side; S514, the NFC terminal displays the electronic invoice received from the POS machine side; S516, completes the transaction. 6 is a preferred flow chart of a method of transmitting an electronic invoice in accordance with an embodiment of the present invention. As shown in Figure 6, the method of transmitting electronic invoices includes:

S602, the POS machine detects and selects a radio frequency card simulated by the mobile phone;

S604, the POS machine and the mobile electronic wallet conduct transaction communication;

S606, the electronic wallet in the SIM card is deducted from the consumption amount, and the POS side records the account number and the consumption amount, and sends it to the background server for synchronization;

S608, the electronic wallet and POS machine consumer transaction communication ends;

S610, the SIM sends a transaction end message to the NFC module, and the NFC initiates the P2P application;

S612, the POS machine prepares the electronic invoice file and initiates the P2P application;

S614, the POS machine establishes a point-to-point communication with the mobile phone;

S616, the POS machine delivers the electronic invoice to the mobile phone side;

S618, the POS machine and the mobile phone point-to-point communication ends;

S620, the entire transaction is over, take the phone off the POS machine. According to the embodiment shown in FIG. 6, when the mobile phone is close to the POS machine, the POS machine detects the presence of the card (mobile wallet) and selects the card, and then the transaction information is transmitted between the POS machine and the card. At the end of the transaction, the SIM card The transaction end message will be sent to the NFC module. The NFC module will start the P2P electronic invoice receiving program, so that the mobile phone enters the peer-to-peer communication state. On the other hand, after the transaction ends, the POS machine will start the electronic invoice sending program and prepare the electronic invoice file. The P2P application is started, so that the POS enters the peer-to-peer communication state. Next, the POS machine establishes a point-to-point communication with the mobile phone, and sends the electronic invoice file to the mobile phone. After the sending is finished, the entire transaction process completes the electronic invoice and the electronic wallet is deducted at the POS machine. After the operation is completed, the POS machine and the mobile phone establish a point-to-point communication, thereby realizing the delivery of the electronic invoice, which is for the user to complete the consumption and receive the electronic invoice once near the mobile phone. According to the embodiment shown in Fig. 6, after receiving the electronic invoice, the mobile phone can manage the electronic invoice, for example, the following management operations can be performed:

1) 4 credit sales of electronic invoices;

2) The electronic invoice can be stored on the Internet for long-term storage and filing for later inquiry;

3) After the electronic invoice is useless, it can be deleted directly;

4) If required, the electronic invoice can be printed on the invoice printer via a Bluetooth printer. Through these management operations, users can be provided with more flexible and convenient operations. In all of the above embodiments, the NFC mobile terminal cannot start the peer-to-peer application when the mobile phone is powered off, and the POS terminal can provide a paper invoice; or, if the consumption is successful and the electronic invoice delivery is unsuccessful The paper terminal side can be replaced by a paper invoice. In all of the above embodiments, the contents of the electronic invoice may include an invoice code, an invoice number, a consumption list, a transaction time, a payment amount, a serial number, a terminal number, a merchant number, a sales unit, etc., and are not strictly set. , but need to comply with national regulations. In summary, the POS machine in the embodiment of the present invention generates a corresponding electronic voucher according to the payment information of the NFC terminal, and transmits the electronic voucher to the NFC terminal through a peer-to-peer communication method, thereby saving paper and facilitating the customer. The preservation and reimbursement of invoices make the electronic payment system more complete and more powerful. It should be noted that the steps shown in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and, although the logical order is shown in the flowchart, in some cases, The steps shown or described may be performed in an order different than that herein. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method for transmitting an electronic voucher based on a near field communication NFC, comprising: a point-of-sale POS machine generating a corresponding electronic voucher according to payment information of an NFC terminal; the POS machine establishing with the NFC terminal Point-to-point communication link;

The POS machine transmits the electronic credential to the NFC terminal over the point-to-point communication link.

2. The method according to claim 1, wherein the step of establishing a point-to-point communication link between the POS machine and the NFC terminal comprises:

The NFC terminal and the POS machine initiate a point-to-point application;

The peer-to-peer application of the NFC terminal establishes the point-to-point communication link with a peer-to-peer application of the POS through a handshake protocol.

The method according to claim 1, wherein the transmitting, by the POS machine, the electronic voucher to the NFC terminal by using the point-to-point communication link comprises:

The POS machine transmits the electronic credential to the NFC terminal in a file form over the point-to-point communication link.

The method according to claim 1, wherein after the POS machine transmits the electronic certificate to the NFC terminal by using the point-to-point communication link, the method further includes:

The NFC terminal manages the electronic voucher.

5. The method of claim 4, wherein the step of managing the electronic credential by the NFC terminal comprises at least one of the following:

Querying the true ^_ of the electronic voucher;

Saving the electronic voucher;

Sort and find saved electronic voucher.

6. A POS machine, characterized in that it comprises:

a generating module, configured to generate a corresponding electronic credential for the payment information of the NFC terminal; and establishing a module, configured to establish a point-to-point communication link with the NFC terminal; And a transmission module configured to transmit the electronic credential to the NFC terminal over the point-to-point communication link.

The POS machine according to claim 6, further comprising:

The storage module is configured to save the electronic voucher as a file.

8. An NFC terminal, characterized by comprising:

Establish a module, set to establish a point-to-point communication link with the POS machine;

And a receiving module configured to receive, by the point-to-point communication link, an electronic credential sent by the POS machine as a file.

The NFC terminal according to claim 8, further comprising:

The electronic voucher management module is configured to manage the electronic voucher, wherein the management comprises at least one of the following:

Querying the true ^_ of the electronic voucher;

Saving the electronic voucher;

Sort and find saved electronic voucher.

10. A transmission system for an electronic voucher based on a near field communication NFC, comprising: a POS machine and an NFC terminal, wherein the POS machine comprises:

a generating module, configured to generate a corresponding electronic credential for the payment information of the NFC terminal; a first establishing module configured to establish a point-to-point communication link with the NFC terminal; and a transmission module configured to be configured by the point-to-point communication link The electronic voucher is transmitted to the NFC terminal;

The NFC terminal includes:

a second establishing module, configured to establish the point-to-point communication link with the POS machine; and a receiving module configured to receive, by the point-to-point communication link, the electronic credential sent by the POS machine in a file form.