WO2014059813A1

WO2014059813A1 - Data transmission method and terminal device

Info

Publication number: WO2014059813A1
Application number: PCT/CN2013/080924
Authority: WO
Inventors: 马海蓉
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-10-18
Filing date: 2013-08-06
Publication date: 2014-04-24
Also published as: CN103781068A

Abstract

A data transmission method and terminal device. The method comprises: a data receiving terminal receiving a near-field communication tag sent by a data sending terminal; the data receiving terminal parsing the near-field communication tag to obtain transmission information; the data receiving terminal establishing a connection with the data sending terminal according to the transmission information; and the data receiving terminal receiving data sent by the data sending terminal, the communication information being written into the near-field communication tag in a near-field communication data exchange format. The technical solution implements authentication by means of near-field communication between devices, thereby effectively avoiding the identity spoofing problem of a traditional authentication manner in the network space, and ensuring security of data transmission. In addition, near-field communication between devices replaces complex clicking and pressing operations on the devices in the prior art, so that a user can easily and rapidly connect to a to-be-connected device automatically to implement data transmission, thereby minimizing power consumption.

Description

Data transmission method and terminal device

Technical field

The present invention relates to the field of data transmission technologies, and in particular, to a data transmission method and a terminal device. Background technique

With the increasing power of various functions of mobile devices, such as multimedia functions, users are increasingly demanding to transmit big data on mobile devices. It is hoped that the data transmission process has the characteristics of high speed, simple operation, and high security. At present, technologies for data and data transmission between commonly used mobile devices include Bluetooth technology, WIFI technology, and Near Field Communication (NFC).

Bluetooth technology has the characteristics of high communication speed and long communication distance. However, it is necessary to perform operations such as searching for a device, answering a pair, and confirming the connection before the data is officially transmitted. Such operations are cumbersome and complicated to use, and the connection mechanisms provided are limited in security. If a higher level of security is required then a transport layer or application layer is required. And,

WIFI technology is relatively mature, with the characteristics of communication speed and communication distance, and provides a variety of optional access authentication modes to ensure connection security. However, compared to Bluetooth technology and NFC technology, WIFI technology is less secure. Moreover, WIFI technology is generally used for network access of mobile devices, and less for point-to-point data transmission.

NFC technology has the characteristics of establishing a fast connection because it does not require authentication during communication, but the communication distance is short, less than 10 cm. Although the communication distance is short, the safety of NFC technology is high. It is also widely used on mobile devices due to its low power consumption, low price and the ability to implement card readers in mobile payment applications.

According to the respective characteristics of the above three technologies, each technology alone cannot meet the requirements of fast data transmission, simple operation and high security.

Summary of the invention

The object of the present invention is to provide a data transmission method and a device terminal, so as to meet the requirements of fast data transmission, simple operation, and high security. In order to solve the above technical problems, the following technical solutions are used:

A data transmission method for a data receiving terminal, the method comprising:

Receiving a near field communication tag sent by the data transmitting terminal;

Parsing the near field communication tag to obtain transmission information;

Establishing a connection with the data transmitting terminal according to the transmission information;

Receiving data sent by the data transmitting terminal through the established connection;

Wherein the transmission information is written to the near field communication tag in a near field communication data exchange format. Optionally, the near field communication tag further carries data information written in a near field communication data exchange format, where the data information includes a file name, a file suffix name, and a file size of the data;

The step of receiving the data sent by the data transmitting terminal by the established connection comprises: the data receiving terminal receiving the data sent by the data sending terminal according to the data information through the established connection.

Optionally, the transmission information includes a Bluetooth device hardware address;

The step of establishing a connection with the data transmitting terminal according to the transmission information includes: the data receiving terminal establishing a Bluetooth connection with the data sending terminal according to the hardware address of the Bluetooth device.

Optionally, the transmission information includes WIFI information of the data sending terminal;

The step of establishing a connection with the data transmitting terminal according to the transmission information includes: the data receiving terminal establishing a port connection with the data sending terminal according to the WIFI information of the data sending terminal.

Optionally, the WIFI information of the data sending terminal includes a service set identifier of the wireless access point connected to the data sending terminal, an identity authentication key, and an IP address of the data sending terminal;

The step of the data receiving terminal establishing a port connection with the data sending terminal according to the WIFI information of the data sending terminal includes:

The data receiving terminal determines whether to access the same wireless access point with the data sending terminal according to the service set identifier of the wireless access point connected to the data sending terminal;

When the data receiving terminal and the data transmitting terminal access the same wireless access point, the data connection terminal directly establishes a port connection according to the IP address of the data sending terminal. Optionally, the step of the data receiving terminal establishing a port connection with the data sending terminal according to the WIFI information of the data sending terminal further includes:

When the data receiving terminal and the data sending terminal access different wireless access points, the data receiving terminal is disconnected from its original wireless access point;

And the data receiving terminal establishes a connection with the wireless access point connected to the data sending terminal according to the service set identifier and the identity authentication key of the wireless access point connected by the data sending terminal;

The data receiving terminal establishes a port connection according to an IP address of the sending terminal.

A terminal device is used for data transmission, and the terminal device comprises a near field communication unit and a connection unit, wherein:

The near field communication unit is configured to: receive a near field communication tag sent by the data transmitting terminal, and parse the near field communication tag to obtain transmission information, where the transmission information is written into the near field communication tag in a near field communication data exchange format;

The connecting unit is configured to: establish a connection with the data sending terminal according to the transmission information, and receive data sent by the data sending terminal by using the established connection.

Optionally, the near field communication tag further carries data information written in a near field communication data exchange format, where the data information includes a file name, a file suffix name, and a file size of the data;

The connecting unit is configured to establish a connection with the data transmitting terminal according to the transmission information and receive data sent by the data sending terminal according to the established connection: establishing a connection with the data sending terminal according to the transmission information And receiving data sent by the data transmitting terminal according to the data information through the established connection.

The connection unit is a Bluetooth device unit, and is configured to establish a connection with the data sending terminal according to the transmission information according to the following manner: establishing a Bluetooth connection with the Bluetooth device unit of the data sending terminal according to the Bluetooth device hardware address.

The connection unit is a WIFI connection unit, and is configured to transmit information according to the following manner Establishing a connection with the data sending terminal: establishing a port connection with the data sending terminal according to the WIFI information of the data sending terminal.

The near field communication unit includes an obtaining module and a determining module, wherein:

The obtaining module is configured to: obtain a service set identifier of the wireless access point to which the terminal device is connected;

The determining module is configured to: determine, according to a service set identifier of the wireless access point connected to the data sending terminal, whether to access the same wireless access point with the data sending terminal;

The WIFI connection unit includes a port connection module and an access connection module, where: the port connection module is configured to: when the terminal device and the data transmission terminal access the same wireless access point, according to the data sending terminal The IP address establishes a port connection;

The access connection module is configured to: when the terminal device and the data sending terminal access different wireless access points, disconnect from the original wireless access point, and connect according to the wireless connection of the data sending terminal The service set identifier and the identity authentication key of the ingress establish a connection with the wireless access point to which the data transmitting terminal is connected.

A terminal device for data transmission, the device comprising a near field communication unit and a connection unit, wherein:

The near field communication unit is configured to: write the transmission information into the near field communication tag in a near field communication data exchange format and send the data to the data receiving terminal, so that the data receiving terminal establishes a connection with the terminal device according to the transmission information;

The connection unit is configured to: establish a connection with the data receiving terminal and transmit data to the data receiving terminal through the established connection.

Optionally, the near field communication tag further carries data information written by the near field communication data exchange format for the data receiving terminal to receive data sent by the terminal device, where the data information includes a file name and a file of the data. Suffix name and file size. Optionally, the transmission information is a Bluetooth device hardware address, and the connection unit is a Bluetooth device unit.

Optionally, the transmission information is WIFI information, where the WIFI information includes a service set identifier of the wireless access point connected to the terminal device, an identity authentication key, and an IP address of the terminal device; WIFI connection unit.

The above technical solution realizes authentication by using a near field communication method between devices, that is, a close proximity (within 10 cm) approaching in physical space, effectively avoiding the identity fraud problem of the traditional authentication mode of the network space, and ensuring the security of data transmission. . Moreover, the cumbersome click-and-click operation on the device that replaces the conventional device by the close proximity between the devices enables the user to quickly and easily perform data transmission with the device to be connected, thereby achieving the requirement of minimizing energy consumption. At the same time, data transmission is carried out through technologies such as Bluetooth and WIFI, thereby maintaining the characteristics of high transmission rate, and the efficiency of data exchange between mobile devices is relatively high. BRIEF abstract

1 is a flowchart of a data transmission method according to an embodiment of the present invention;

2 is a flowchart of a NFC-based Bluetooth data transmission method according to an embodiment of the present invention; FIG. 3 is a flowchart of a NFC-based WIFI data transmission method according to an embodiment of the present invention; A schematic diagram of the structure of a terminal device;

FIG. 5 is a schematic structural diagram of another terminal device according to an embodiment of the present invention.

Preferred embodiment of the invention

The present invention will be described in detail below with reference to the drawings and specific embodiments.

Embodiment 1

1 is a flowchart of a data transmission method according to an embodiment of the present invention, which may be applied to a data receiving terminal to implement communication with a data transmitting terminal, the data receiving terminal and data transmission The terminal can be two terminal devices in the same system, or two terminal devices in different systems. The specific implementation method is as follows:

Step S101: Receive a near field communication label sent by the data sending terminal.

In this step, the data transmitting terminal selects the file to be sent and the application that enables the method of the embodiment, and then when the data receiving terminal reaches the NFC communication distance (within 10 cm), the near field communication unit of the data transmitting terminal sets the near field communication label. Pushing to the data receiving unit, so that the data receiving unit receives the near field communication tag, wherein the near field communication tag carries the transmission information written in the Near Field Data Exchange Format (NDEF, NFC Data Exchange Fomat). The transmission information may be a Bluetooth device hardware address of the data transmission terminal, or may be a WIFI information of the data transmission terminal, and includes a service set identifier (SSID, Service Set) of the wireless access point (AP, Access Point) connected by the data sending terminal. Identifier), the identity authentication key and the IP address of the data sending terminal. The near field communication tag further carries data information and application identification information written in a near field communication data exchange format, the data information includes a file name, a file suffix name and a file size of the data, and the application identification information identifier resolves the near field according to the near field communication data exchange format. Communication label.

Step S102: Parsing a near field communication tag to obtain transmission information.

In this step, the near field communication unit of the data receiving terminal parses the received near field communication tag to obtain transmission information. When the transmission data is the Bluetooth device hardware address of the data transmitting terminal, the near field communication unit of the data receiving terminal parses the hardware address of the Bluetooth device. When the transmission information is WIFI information, the near field communication unit of the data receiving terminal obtains the SSID of the AP connected to the data transmitting terminal, the identity authentication key and the IP address of the data transmitting terminal, and obtains the SSID of the connected AP, and It is judged whether the data transmitting terminal and the data receiving terminal are connected to the same AP.

Step S103: Establish a connection with the data sending terminal according to the transmission information.

In this step, the connection unit of the data receiving terminal quickly establishes a Bluetooth connection by using the Bluetooth device hardware address of the data transmitting terminal. When the same AP is connected to the data transmitting terminal, the connecting unit of the data receiving terminal directly establishes a Socket connection with the data transmitting terminal by using the IP address of the data transmitting terminal. When a different AP is connected to the data transmitting terminal, after disconnecting the original AP, the SSID and the identity authentication of the AP connected to the data transmitting terminal are used to establish a connection and connect with the new AP. Step S104: Receive data sent by the data transmitting terminal through the established connection. In this embodiment, the near field communication mode between the devices is adopted, that is, the proximity in the physical space (within 10 cm) is implemented in a close manner, thereby effectively avoiding the identity fraud problem of the traditional authentication mode of the network space, and ensuring the security of data transmission. Moreover, the close proximity between the devices replaces the cumbersome click-and-click operation on the conventional device, so that the user can quickly and easily connect with the device to be connected to implement data transmission, thereby achieving the requirement of minimizing energy consumption. At the same time, the present invention performs data transmission through technologies such as Bluetooth and WIFI, thereby maintaining the characteristics of high transmission rate, and the efficiency of data exchange between mobile devices is high.

In the embodiment of the present invention, the near field communication tag may further carry data information written in a near field communication data exchange format, where the data information includes a file name, a file suffix name, and a file size of the data, and the data receiving terminal according to the The data information receives the data sent by the data transmitting terminal through the established connection.

Embodiment 2

2 is a flowchart of an NFC-based Bluetooth data transmission method according to an embodiment of the present invention, which may be applied between communication devices in the same system, and may also be applied between communication devices in different systems, the communication device It uses the Android operating system and has NFC units and Bluetooth devices and can be recognized and run normally by the Android operating system. The specific implementation method is as follows:

Step S201: The communication sender selects the file to be sent through the communication device A, and selects the application using the method in the "Share" menu in the file manager. At this time, the sender's NFC unit and Bluetooth device can be turned on or off. If it is off, the application of this method will automatically turn on its NFC unit and Bluetooth device.

Step S202: The communication sender brings the communication device A close to the communication device B of the communication receiver to the communication range of the NFC. At this time, the NFC unit of the communication receiving communication device B needs to be in an on state.

Step S203: After the communication device A queries its own Bluetooth device hardware address, the NFC unit writes the file information, its own Bluetooth hardware address information, and the application identification information to the NFC tag according to the NDEF format, and pushes the communication device to the communication receiver by using the PUSH method. B. The application identifier information indicates that the NFC tag received by the receiver should be parsed by the NFC unit using the application of the method. File information includes file name, file suffix name, and file size. Step S204: After receiving the NFC tag, the NFC unit of the communication device B automatically starts the parsing module by using the Android system, and the module parses the Bluetooth hardware address information and the file information of the communication sender from the NFC tag according to the NDEF format. At this time, if the Bluetooth unit of the receiver is not turned on, the application of the method is automatically turned on.

Step S205: The NFC unit of the communication device B quickly establishes a Bluetooth connection between the communication device A and the Bluetooth device of the communication device B by directly using the Bluetooth hardware address of the communication sender through the Android system.

Step S206: The communication sender transmits the selected file by using the established Bluetooth connection. During the transmission, if there is any change in the Bluetooth connection status, the communication system A and the Android device of the communication device B notify the communication sender and the receiver of the Bluetooth connection status change.

Step S207: After the file transmission is completed, the Bluetooth connection between the communication device A and the communication device B is disconnected, and the transmission of the communication sender and the receiver is prompted.

In this embodiment, by using the NFC technology, the connection establishment time is greatly shortened, the energy saving and the consumption are reduced, and the security and certainty of the communication are ensured. In addition, the operation of the embodiment is simple and quick, and the user does not add other click-selection requests, etc., except that the user clicks the file operation for the first time, which greatly enhances the user's use feeling and integrates into the "share" menu of the Android system. And only use the push method, do not join the request process such as permission identification and transition, so that the user can quickly grasp the use of the method application. The communication using Bluetooth in this embodiment makes the data transmission rate faster, and the transmission rate is also ensured on the basis of ensuring security. The application of this embodiment is fully integrated into the Android system and is compatible with the existing Bluetooth hardware, and does not require any modification of the existing hardware.

Embodiment 3

3 is a flowchart of an NFC-based WIFI data transmission method according to an embodiment of the present invention, which may be applied between communication devices in the same system, and may also be applied between communication devices in different systems, and the communication device It uses the Android operating system and has NFC unit and WIFI device and can be recognized and run by the Android operating system. The specific implementation method is as follows:

Step S301: The communication sender selects the file to be sent through the communication device S, and selects the application using the method in the "Share" menu in the file manager. At this time, if the sender's NFC unit and WIFI device can be turned on or off, if it is in the off state, the application of the method will automatically turn on its NFC unit and WIFI device. Step S302: The sender approaches the communication device S to the communication device R of the receiver. When the NFC communication distance is within, the communication device S pushes its own WIFI information, file information and application identification information to the communication device R by using NFC NDEF Push mode. . At the same time, the communication device S establishes a Socket listener for a specific port. The application identification information indicates that the information pushed by the NDEF in this step is parsed by the application that the communication device S uses the method. The WIFI information includes the SSID of the AP to which the communication device S is connected, the identity authentication key, and the IP address of the communication device S. File information includes file name, file suffix name, and file size.

Step S303: After receiving the NDEF Push, the NFC unit of the communication device R automatically starts the parsing module through the Android system, and the module parses the WIFI information and the file information of the communication device S from the NDEF information, and obtains the connection of the communication device R itself. The SSID of the AP checks whether the local R is connected to a wireless AP according to the WIFI information of the communication device S, or determines whether the communication device S is connected to the same AP when the AP is accessed. In this case, you need to obtain the SSID of the AP to which R itself is connected.

Step S304: determining whether the communication device R and the communication device S are connected to the same AP;

Step S305: If the communication device R and the communication device S are connected to the same wireless AP, the communication device

R directly establishes a Socket connection to the communication device S by using the IP address of the communication device S in the WIFI information;

Step S306: If the connection with the communication device S is not the same AP, disconnect the original AP and save the original connection information, and then try to use the SSID and key of the AP connected to the communication device S in the obtained WIFI information. Connect the AP and establish a Socket connection to the communication device S using the IP address of the communication device S after the connection is successful. The port number used when establishing the Socket connection is the port number used by the Socket listener in step S302.

Step S307: The communication device S accepts the Socket connection request of the communication device R and establishes a connection; Step S308: The communication device S sends the selected file to the communication device R through the established Socket connection. If the WIFI connection status is changed (that is, after listening to WIFI-STATE-CHAGED-ACTION broadcast), the file transfer is suspended, and the WIFI management mechanism of the Android system is resumed to resume the connection after the connection is resumed.

Step S309: After the file transmission is completed, the Socket connection between the communication device S and the communication device R is disconnected, and the transmission of the communication sender and the receiver is prompted. In this embodiment, the identity verification in the NFC physical space is used, which avoids the identity forgery problem in the point-to-point file transmission in the traditional short-distance network space, and has high security. By not adding multiple confirmation and authentication modules, the user only needs to perform one click operation and one device close action in the whole process, without any operation requiring user input, which greatly simplifies the user's operation. Incorporating into the "Share" menu of Android devices, and using only the way to push files, without adding pull mode and multiple rights authentication and transition request process, can enable users to quickly understand and master the usage of this method. Use NFC to push information, use NFC technology to quickly establish connection characteristics, conveniently transmit a small amount of auxiliary information, and use WIFI to transfer files. WIFI technology communication distance is usually about 100 meters, and the connection is stable, and the speed is generally up to 2 ~ 7MB/S, so the communication distance, connection stability and data transmission rate are significantly increased compared with the traditional short-range communication methods such as Bluetooth. In addition, WIFI connections already offer multiple authentication methods, thus ensuring the security of files during transmission.

Embodiment 4

FIG. 4 is a schematic structural diagram of a terminal device used for data transmission, for example, a communication device using an Android operating system according to an embodiment of the present invention. The terminal device 400 includes:

The near field communication unit 410 is configured to: receive the near field communication tag pushed by the data transmitting terminal and analyze the near field communication tag to obtain transmission information, and the transmission information is written into the near field communication tag in a near field communication data exchange format;

The connecting unit 420 is configured to: establish a connection with the data transmitting terminal according to the transmission information and receive data transmitted by the data transmitting terminal.

The near field communication tag further carries data information and application identification information written in a near field communication data exchange format, and the data information includes a file name, a file suffix name, and a file size of the data, and the application identification information identifier is parsed according to the near field communication data exchange format. Near field communication tag.

In one embodiment of the present invention, the transmission information is a Bluetooth device hardware address, and the connection unit 420 is a Bluetooth device unit, and is configured to: establish a Bluetooth connection with the Bluetooth device unit of the data transmitting terminal according to the Bluetooth device hardware address.

In another embodiment of the present invention, the transmission information is WIFI information of the data transmission terminal, and the connection unit 420 is a WIFI connection unit, and is configured to: establish a port connection with the data transmission terminal according to the WIFI information of the data transmission terminal. In a specific embodiment, the WIFI information of the data transmitting terminal The SSID of the AP connected to the data transmitting terminal, the identity authentication key, and the IP address of the data transmitting terminal. The near field communication unit 410 includes: an obtaining module 411 configured to: obtain an SSID of the AP connected to the terminal device; the determining module 412 is configured to: determine whether to access the same AP with the data transmitting terminal according to the SSID of the AP connected to the data sending terminal. The WIFI connection unit includes: a port connection module, configured to: when the terminal device and the data transmitting terminal access the same AP, establish a port connection according to the IP address of the data sending terminal; and access the connection module, which is used for accessing the terminal device and the data sending terminal When different APs are disconnected from the original AP, the SSID and the identity authentication key of the AP connected to the data sending terminal are connected to the AP connected to the data sending terminal.

In this embodiment, the NFC unit is used to implement identity verification in the physical space, which avoids the problem of identity forgery in point-to-point file transmission in the traditional short-distance network space, and has high security. By not adding multiple confirmation and authentication modules, the user only needs to perform one click operation and one device close action in the whole process, without any operation requiring user input, which greatly simplifies the user's operation. Incorporate into

In the "Share" menu of the Android device, and only using the push file method, without the pull mode and multiple rights authentication and transition request processes, the user can quickly understand and grasp the usage of the method. NFC is used to push auxiliary information. With the fast connection establishment feature of NFC technology, a small amount of auxiliary information is conveniently transmitted, and files are transmitted using Bluetooth devices and WIFI units, which increases communication distance, connection stability and data transmission rate.

Embodiment 5

FIG. 5 is a schematic structural diagram of another terminal device according to an embodiment of the present invention, which is used for data transmission, for example, a communication device using an Android operating system. The terminal device 500 includes:

The near field communication unit 510 is configured to: write the transmission information into the near field communication tag in a near field communication data exchange format, and transmit the near field communication identifier to the data receiving terminal;

The connection unit 520 is configured to: establish a connection with the data receiving terminal and transmit a receipt.

In one embodiment of the invention, the transmission information is a Bluetooth device hardware address and the connection unit 520 is a Bluetooth device unit. In another embodiment of the present invention, the transmission information is WIFI information, and the WIFI information includes a service set identifier of the wireless access point to which the terminal device is connected, an identity authentication key, and an IP address of the terminal device. The connection unit 520 is a WIFI connection unit.

In this embodiment, the NFC unit is used to implement identity verification in the physical space, which avoids the problem of identity forgery in point-to-point file transmission in the traditional short-distance network space, and has high security. By not adding multiple confirmation and authentication modules, the user only needs to perform one click operation and one device close action in the whole process, without any operation requiring user input, which greatly simplifies the user's operation. Incorporating into the "Share" menu of the Android device, and using only the method of pushing files, without adding the pull mode and various permission authentication and transition request processes, the user can quickly understand and master the usage of the method. NFC is used to push auxiliary information. With the fast connection establishment feature of NFC technology, a small amount of auxiliary information is conveniently transmitted, and files are transmitted using Bluetooth devices and WIFI units, which increases communication distance, connection stability and data transmission rate.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to be limiting, and those skilled in the art should understand that the technical solutions of the present invention may be modified or equivalently substituted without departing from the technical solutions of the present invention. The spirit of the scope should be covered by the scope of the claims of the present invention.

Industrial applicability

The above technical solution realizes authentication by using a near field communication method between devices, that is, a close proximity (within 10 cm) approaching in physical space, effectively avoiding the identity fraud problem of the traditional authentication mode of the network space, and ensuring the security of data transmission. . Moreover, the cumbersome click-and-click operation on the device that replaces the conventional device by the close proximity between the devices enables the user to quickly and easily perform data transmission with the device to be connected, thereby achieving the requirement of minimizing energy consumption. At the same time, data transmission is carried out through technologies such as Bluetooth and WIFI, thereby maintaining the characteristics of high transmission rate, and the efficiency of data exchange between mobile devices is relatively high. Therefore, the present invention has strong industrial applicability.

Claims

Claim

Parsing the near field communication tag to obtain transmission information;

Wherein the transmission information is written to the near field communication tag in a near field communication data exchange format.

2. The data transmission method according to claim 1, wherein:

The near field communication tag further carries data information written in a near field communication data exchange format, the data information including a file name, a file suffix name, and a file size of the data;

3. The data transmission method according to claim 1, wherein:

The transmission information includes a Bluetooth device hardware address;

4. The data transmission method according to claim 1, wherein:

The transmission information includes WIFI information of the data transmitting terminal;

5. The data transmission method according to claim 4, wherein:

The WIFI information of the data transmitting terminal includes a service set identifier of the wireless access point connected to the data sending terminal, an identity authentication key, and an IP address of the data sending terminal;

Transmitting, by the data receiving terminal, the WIFI information of the data sending terminal and the data The steps for the terminal to establish a port connection include:

When the data receiving terminal and the data transmitting terminal access the same wireless access point, the data connection terminal directly establishes a port connection according to the IP address of the data sending terminal.

The data transmission method according to claim 5, wherein the step of the data receiving terminal establishing a port connection with the data transmitting terminal according to the WIFI information of the data transmitting terminal further includes:

7. A terminal device for data transmission, the terminal device comprising a near field communication unit and a connection unit, wherein:

8. The terminal device according to claim 7, wherein:

9. The terminal device according to claim 7, wherein:

The transmission information includes a Bluetooth device hardware address;

10. The terminal device according to claim 7, wherein:

The connection unit is a WIFI connection unit, and is configured to establish a connection with the data sending terminal according to the transmission information according to the following manner: establishing a port connection with the data sending terminal according to the WIFI information of the data sending terminal.

11. The terminal device according to claim 10, wherein:

12. A terminal device for data transmission, the device comprising a near field communication unit and a connection unit, wherein: The near field communication unit is configured to: write the transmission information into the near field communication tag in a near field communication data exchange format and send the data to the data receiving terminal, so that the data receiving terminal establishes a connection with the terminal device according to the transmission information;

13. The terminal device according to claim 12, wherein:

The near field communication tag further carries data information written in a near field communication data exchange format for the data receiving terminal to receive data transmitted by the terminal device, where the data information includes a file name, a file suffix name, and a file size of the data. .

14. The terminal device according to claim 12, wherein:

The transmission information is a Bluetooth device hardware address, and the connection unit is a Bluetooth device unit.

15. The terminal device according to claim 12, wherein:

The transmission information is WIFI information, and the WIFI information includes a service set identifier of the wireless access point to which the terminal device is connected, an identity authentication key, and an IP address of the terminal device;

The connecting unit is a WIFI connecting unit.