CN106375839A - Connection establishment method and user terminal - Google Patents

Abstract

The embodiment of the invention relates to the technical field of the Internet, and discloses a connection establishment method and a user terminal. The user terminal comprises a sending module used for sending a multicast messages, wherein the multicast message comprises a first IP address and a first port number of the user terminal; a receiving module used for receiving a response message, wherein the response message comprises a second IP address and a second port number of the user terminal; and a processing module used for determining that a connection is established with the other user terminal when the receiving module receives the response message. By adoption of the user terminal provided by the embodiment of the invention, the connection establishment speed between the user terminals can be accelerated.

Description

Connection establishment method and user terminal

technical field

The embodiments of the present invention relate to the technical field of the Internet, and in particular to a method for establishing a connection and a user terminal.

Background technique

With the development of mobile Internet technology, it has become a trend for smart TVs to replace traditional TVs. A smart TV can have an operating system, in addition to the functions of a traditional TV, such as real-time broadcasting of TV programs through access to cable TV signals, and the ability to install or uninstall applications, thereby providing a variety of services. In addition, a smart TV can directly communicate with other smart devices such as a mobile phone, for example, a mobile phone can search for a TV to establish a connection with the TV.

At present, the connection process between the mobile phone and the TV specifically includes: first step, the mobile phone sends a multicast message. In the second step, the TV responds after receiving the multicast message, wherein the content of the response includes the IP (Internet Protocol, Internet Protocol) address and port number of the device. In the third step, the mobile phone establishes an HTTP (Hyper TextTransport Protocol, hypertext transfer protocol) connection with the TV after receiving the response, and obtains corresponding information from the TV, such as a device name and a service ID (Identify, identification). Step 4: The mobile phone registers the service with the TV. After the registration is successful, the TV returns the registration ID to the mobile phone, thus completing the entire connection creation process. Wherein, there is a one-to-one correspondence between the service ID and the registration ID.

The inventors of the present application have found in practice that since HTTP is based on TCP (Transmission Control Protocol, Transmission Control Protocol), during the connection process between the existing mobile phone and the smart TV, there needs to be a connection between the above-mentioned mobile phone and the smart TV. To establish a TCP connection, the mobile phone and the smart TV need to constantly confirm information with each other, which makes the connection establishment time too long, especially in the case of a bad network environment, the connection may not be established for a long time. In addition, in the existing system, service registration is also integrated in the connection creation process, so it will further prolong the completion time of connection establishment.

Contents of the invention

The purpose of the present invention is to provide a method for establishing a connection and a user terminal, which can increase the speed of establishing a connection between user terminals.

In order to solve the above technical problems, an embodiment of the present invention provides a user terminal, including: a sending module, configured to send a multicast message, and the multicast message includes: the first IP address and the first port of the user terminal number; a receiving module, configured to receive a response message, including: a second IP address and a second port number of another user terminal; and a processing module, configured to receive the response message when the receiving module receives the response message , it is determined that a connection has been established with the other user terminal.

The embodiment of the present invention also provides a user terminal, including: a receiving module, configured to receive a multicast message, and the multicast message includes: a first IP address and a first port number of another user terminal; a sending module , for returning a response message to the other user terminal according to the multicast message, where the response message includes: a second IP address and a second port number of the user terminal; a processing module, configured to when the When the sending module returns the response message to the other user terminal, it determines that a connection is established with the other user terminal.

The embodiment of the present invention also provides a method for establishing a connection for a first user terminal, including: sending a multicast message, and the multicast message includes: the first IP address and the first IP address of the first user terminal Port number; receive a response message, the response message includes: the second IP address and the second port number of the second user terminal; and when receiving the response message, determine to establish the connection with the second user terminal connected.

Embodiments of the present invention also provide a connection establishment method for a second user terminal, including: receiving a multicast message, the multicast message including: a first IP address and a first port number of the first user terminal ; According to the multicast message, return a response message to the first user terminal, the response message includes: the second IP address and the second port number of the second user terminal; When the user terminal returns the response message, it is determined that a connection has been established with the first user terminal.

Compared with the prior art, the embodiment of the present invention, when two user terminals (such as mobile phones and smart TVs) exchange each other's IP addresses and port numbers through multicast messages and response messages, the two user terminals are confirmed to be The endpoint establishes the connection without subsequent HTTP creation and service registration. That is to say, in the connection establishment process of the embodiment of the present invention, such as the existing HTTP creation process and service registration process are not included, thereby simplifying the connection establishment process of the embodiment of the present invention, thereby speeding up the The connection establishment speed between user terminals.

In addition, the response message also includes: the service identifier of the user terminal; the processing module in the user terminal is configured to accept the service ID of the other user terminal after confirming that a connection has been established with the other user terminal. A service registration request, the service registration request including the service identifier; a caching module in the user terminal, configured to cache the corresponding service identifier before the processing module confirms that a connection has been established with the other user terminal. service management file. In this embodiment, since the service management file is cached before the connection is established between the user terminals, after the connection is established, if a service registration request is received, the service registration request can be responded immediately, thereby speeding up the service registration speed.

Description of drawings

FIG. 1 is a schematic flowchart of a method for establishing a connection according to a first embodiment of the present invention;

FIG. 2 is a schematic flowchart of a method for establishing a connection according to a second embodiment of the present invention;

FIG. 3 is a schematic flowchart of a method for establishing a connection according to a third embodiment of the present invention;

FIG. 4 is a schematic flowchart of a method for establishing a connection according to a fourth embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a user terminal according to a fifth embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a user terminal according to a sixth embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a user terminal according to a seventh embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a user terminal according to an eighth embodiment of the present invention;

Fig. 9 is a schematic structural diagram of a connection establishment system according to a ninth embodiment of the present invention.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, various embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art can understand that in each embodiment of the present invention, many technical details are provided for readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solution claimed in each claim of the present application can be realized.

Currently, the process of establishing a connection between a mobile phone and a smart TV includes: establishing an HTTP connection and registering a service. And HTTP is based on TCP (TCP is an existing safe and reliable connection establishment method, which ensures the accuracy of the transmitted information through multiple handshake (confirmation) operations between the two sides of the connection establishment), so the establishment of HTTP connection needs There are multiple handshake operations between the mobile phone and the smart TV, so the creation of HTTP will slow down the existing connection establishment process. In addition, all services are generally registered during the connection establishment process, but most of these registered services may not be actually used, so including service registration in the connection establishment process will make the connection establishment process redundant steps, and will further slow down the connection establishment process. In view of this, the present invention provides the following embodiments to improve the defects of the prior art.

The first embodiment of the present invention relates to a method for establishing a connection, and its specific process is shown in FIG. 1 . The method for establishing a connection can be used in user terminals such as mobile phones. Wherein, the connection establishment method includes the following steps:

Step 102: Send a multicast message, where the multicast message includes: a first IP address and a first port number of the first user terminal.

Wherein, the first user terminal in this step is the execution subject of the method for establishing a connection in the embodiment of the present invention.

In addition, the multicast message in this step may be a UDP (User Datagram Protocol, User Datagram Protocol) multicast message.

Step 104: Receive a response message, where the response message includes: a second IP address and a second port number of the second user terminal.

Wherein, the second user terminal in this step may be, for example, a smart hand vision.

Step 106: When a response message is received in step 104, it is determined that a connection has been established between the first user terminal and the second user terminal.

In this embodiment, when two user terminals (such as a mobile phone and a smart TV) exchange each other's IP addresses and port numbers through multicast messages and response messages, it is confirmed that the two user terminals have established a connection. That is to say, the connection establishment process in this embodiment does not include the existing HTTP creation process and service registration process, thereby simplifying the connection establishment process in the embodiment of the present invention, thereby speeding up the process in the embodiment of the present invention The connection establishment speed between user terminals.

The second embodiment of the present invention also relates to a method for establishing a connection, and its specific process is shown in FIG. 2 .

In step 202, a multicast message is sent, wherein the multicast message includes: a first IP address and a first port number of the first user terminal.

In step 204, a response message is received, wherein the response message includes: a second IP address and a second port number of the second user terminal, and a service identifier of the second user terminal.

Specifically, the received response message not only includes: the second IP address and the second port number of the second user terminal, but also includes: the service identifier of the second user terminal, which is used to identify the service of the second user terminal. Wherein, these service identifiers may include but not limited to: connection management service identifiers, transmission management service identifiers, and control management service identifiers, which are respectively used to identify connection management services, transmission management services, and control management services. In addition, the response message may also include: device name, version number, and so on.

In step 206, when a response message is received in step 204, it is determined that a connection has been established between the first user terminal and the second user terminal.

In the existing method, service registration is embedded in the connection establishment process (that is, as an integral part of the connection establishment process, if the service cannot be successfully registered, the connection establishment fails), and all services are registered once. However, on the one hand, this method will slow down the establishment of the connection. On the other hand, not all registered services will be used later in practice, so there is redundancy. In this embodiment, in the connection establishment process, no actual service registration is performed, but only the service ID (that is, indicating which services can be provided) is passed between the user terminals, thereby simplifying the connection establishment process and speeding up the connection process. Build speed. In addition, in the embodiment of the present invention, after the connection is established between the user terminals, the service can be registered according to the user's requirement, that is, the service can be registered on demand. For example, when users need to transfer files between mobile phones and smart TVs, they can register for transfer management services.

The above two embodiments mainly illustrate the process of the connection establishment method from the perspective of the mobile phone as the user terminal. The method for establishing a connection in the embodiment of the present invention will be described below from the perspective of a smart TV as a user terminal.

The third embodiment of the present invention relates to a method for establishing a connection, and its specific process is shown in FIG. 3 . The method for establishing a connection can be applied to a user terminal that can be used as a smart TV. It specifically includes the following steps:

Step 302: Receive a multicast message, where the multicast message includes: a first IP address and a first port number of the first user terminal.

Wherein, in this step, the first user terminal may be a mobile phone.

In addition, in the step, the received multicast message may be, for example, a UDP multicast message.

Step 304: According to the multicast message, return a response message to the first user terminal, wherein the response message includes: a second IP address and a second port number of the second user terminal.

Step 306: When a response message is returned to the first user terminal in step 304, it is determined that a connection is established with the first user terminal.

Wherein, the second user terminal in this step may be, for example, a smart TV for performing the method for establishing a connection in this embodiment.

In this embodiment, when two user terminals (such as a mobile phone and a smart TV) exchange each other's IP addresses and port numbers through multicast messages and response messages, it is confirmed that the two user terminals have established a connection. That is to say, the connection establishment process in this embodiment does not include the existing HTTP creation process and service registration process, thereby simplifying the connection establishment process in the embodiment of the present invention, thereby speeding up the process in the embodiment of the present invention The connection establishment speed between user terminals.

The fourth embodiment of the present invention also relates to a method for establishing a connection, and its specific process is shown in FIG. 4 .

In step 402, a multicast message is received, wherein the multicast message includes: a first IP address and a first port number of a first user terminal.

In step 404, a response message is returned to the first user terminal according to the multicast message, wherein the response message includes: a second IP address and a second port number of the second user terminal, and a service identifier of the second user terminal. That is to say, in step 404, the response message returned to the first user terminal not only includes: the second IP address and the second port number of the second user terminal, but also includes: the service identifier of the second user terminal, used for identifying the service of the second user terminal. Wherein, these service identifiers may include but not limited to: connection management service identifiers, transmission management service identifiers, and control management service identifiers, which are respectively used to identify connection management services, transmission management services, and control management services. In addition, the response message may also include: device name, version number, and so on.

In step 406, when a response message is returned to the first user terminal in step 404, it is determined that a connection is established with the first user terminal.

In this embodiment, during the connection establishment process, the actual service registration is not performed, but only the service ID (that is, indicating which services can be provided) is passed between the user terminals, so that the connection establishment process can be simplified and the connection establishment can be accelerated speed. In addition, in the embodiment of the present invention, after the connection is established between the user terminals, the service can be registered according to the user's requirement, that is, the service can be registered on demand.

The division of steps in the above methods is only for the sake of clarity of description. During implementation, they can be combined into one step or some steps can be split and decomposed into multiple steps. As long as they contain the same logical relationship, they are all within the scope of protection of this patent. ; Adding insignificant modifications or introducing insignificant designs to the algorithm or process, but not changing the core design of the algorithm and process are all within the scope of protection of this patent.

The fifth embodiment of the present invention relates to a user terminal, the specific structure of which is shown in FIG. 5 . The user terminal may be a mobile phone, a tablet computer, a wearable device, and the like. Wherein, the user terminal 500 includes:

The sending module 502 is configured to send a multicast message, wherein the multicast message includes: the first IP address and the first port number of the user terminal 500 .

In addition, the multicast message sent by the sending module 502 may be, for example, a UDP multicast message.

The receiving module 504 is configured to receive a response message, where the response message includes: a second IP address and a second port number of another user terminal.

The processing module 506 is configured to determine that a connection has been established with another user terminal when the receiving module 504 receives the response message.

Wherein, the other user terminal may be, for example, a smart TV, and the other user terminal is a user terminal that receives the above-mentioned multicast message and responds to the multicast message.

In this embodiment, when two user terminals (such as a mobile phone and a smart TV) exchange each other's IP addresses and port numbers through multicast messages and response messages, it is confirmed that the two user terminals have established a connection. That is to say, the connection establishment process in this embodiment does not include the existing HTTP creation process and service registration process, thereby simplifying the connection establishment process in the embodiment of the present invention, thereby speeding up the process in the embodiment of the present invention The connection establishment speed between user terminals.

It is not difficult to find that this embodiment is a system embodiment corresponding to the first embodiment, and this embodiment can be implemented in cooperation with the first embodiment. The relevant technical details mentioned in the first embodiment are still valid in this embodiment, and will not be repeated here to reduce repetition. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied in the first embodiment.

In another embodiment of the user terminal 500, the response message received by the receiving module 504 not only includes: the second IP address and the second port number of another user terminal, but also includes: the service identifier of another user terminal, A service used to identify another user terminal. Wherein, these service identifiers may include but not limited to: connection management service identifiers, transmission management service identifiers, and control management service identifiers, which are respectively used to identify connection management services, transmission management services, and control management services. In addition, the response message may also include: device name, version number, and so on.

In this embodiment, in the connection establishment process, the actual service registration is not performed, but only the service ID (that is, indicating which services can be provided) is passed between the user terminals, so that the connection establishment process can be simplified to speed up the connection establishment speed . In addition, in the embodiment of the present invention, after the connection is established between the user terminals, the service can be registered according to the user's requirement, that is, the service can be registered on demand.

The sixth embodiment of the present invention also relates to a user terminal 500, the specific structure of which is shown in FIG. 6 . The embodiment in FIG. 6 is substantially the same as the embodiment in FIG. 5 , the main difference is that: the response message received by the receiving module 502 also includes: at least one service identifier, used to identify a service provided by another user terminal. Wherein, these service identifiers may include but not limited to: connection management service identifiers, transmission management service identifiers, and control management service identifiers, which are respectively used to identify connection management services, transmission management services, and control management services. In addition, the embodiment in FIG. 6 also includes: a registration module 508, configured to register a service with another user terminal according to the selected service identifier (for example, the service identifier selected by the user) in at least one service identifier. Wherein, the process of registering the service may include: firstly, receiving the service ID selected by the user. It should be noted that the user may not directly select the service ID, but generally the user directly selects the required service, and the selected user can determine the corresponding service ID. Next, a service registration request is sent to another user terminal, wherein the service registration request includes: the selected service identifier (ie, service ID), the IP address and port number of the other user terminal. Finally, the service registration success message returned by the other user terminal is received, and the service registration success message includes: registration ID, IP address and port number of the user terminal. Wherein, there is a one-to-one correspondence between the registration ID and the service ID.

In this embodiment, the service registration is placed after the connection is established. On the one hand, the connection establishment process can be simplified, so as to speed up the connection establishment speed. On the other hand, services can be registered on demand, thereby avoiding registration of some unnecessary services.

The above two embodiments mainly illustrate the structure from the perspective of the user terminal 500 as a mobile phone. The user terminal involved in the embodiment of the present invention will be described below from the perspective of the user terminal as a smart TV.

The seventh embodiment of the present invention relates to a user terminal, the specific structure of which is shown in FIG. 7 . The user terminal 700 may be a smart TV, which specifically includes:

The receiving module 702 is configured to receive a multicast message, where the multicast message includes: a first IP address and a first port number of another user terminal.

Wherein, the other user terminal may be a mobile phone, and the multicast message is sent by the other user terminal.

In addition, the multicast message received by the receiving module 702 may be, for example, a UDP multicast message.

The sending module 704 is configured to return a response message to another user terminal according to the multicast message, wherein the response message includes: the second IP address and the second port number of the user terminal 700 .

The processing module 706 is configured to determine that a connection is established with another user terminal when the sending module 704 returns a response message to the other user terminal.

In this embodiment, when two user terminals (such as a mobile phone and a smart TV) exchange each other's IP addresses and port numbers through multicast messages and response messages, it is confirmed that the two user terminals have established a connection. That is to say, the connection establishment process in this embodiment does not include the existing HTTP creation process and service registration process, thereby simplifying the connection establishment process in the embodiment of the present invention, thereby speeding up the process in the embodiment of the present invention The connection establishment speed between user terminals.

It is not difficult to find that this embodiment is a system embodiment corresponding to the third embodiment, and this embodiment can be implemented in cooperation with the third embodiment. The relevant technical details mentioned in the third embodiment are still valid in this embodiment, and will not be repeated here in order to reduce repetition. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied in the third embodiment.

In another embodiment of the user terminal 700, the response message returned to another user terminal not only includes: the second IP address and the second port number of the user terminal 700, but also includes: the service identifier of the user terminal 700, A service for identifying the user terminal 700 . Wherein, these service identifiers may include but not limited to: connection management service identifiers, transmission management service identifiers, and control management service identifiers, which are respectively used to identify connection management services, transmission management services, and control management services. In addition, the response message may also include: device name, version number, and so on.

In this embodiment, in the connection establishment process, the actual service registration is not performed, but only the service ID (that is, indicating which services can be provided) is passed between the user terminals, so that the connection establishment process can be simplified to speed up the connection establishment speed .

The eighth embodiment of the present invention also relates to a user terminal 700, the specific structure of which is shown in FIG. 8 . The embodiment in FIG. 8 is substantially the same as the embodiment in FIG. 7 , the main difference is that: the response message returned by the sending module 704 to another user terminal not only includes: the second IP address and the second port number of the user terminal 700, but also Including: the service identifier of the user terminal 700, used to identify the service of the user terminal 700. Wherein, these service identifiers may include but not limited to: connection management service identifier, transmission management service identifier and control management service identifier. In addition, the processing module 706 may also be configured to accept a service registration request from another user terminal after determining that a connection has been established between the user terminal 700 and another user terminal, wherein the service request includes: a service identifier (i.e. Service ID). Wherein, the process of accepting the service registration request may generally include: receiving the service registration request, which includes: a service identifier. Next, register the service corresponding to the service identifier; finally, return a message of successful registration to another user terminal, wherein the message of successful registration includes: a registration ID, which corresponds to a service ID one by one. It should be noted that the above-mentioned service registration process is mainly to load the service management file corresponding to the service identifier into the cache, so the user terminal 700 may also include: a cache module 708, which is used to pre-register All service management files are cached, for example, all service management files are cached when booting, so that after receiving the service registration request, the user terminal 700 can directly return the registration ID to indicate that the registration is successful, thereby speeding up the service registration speed.

Wherein, the service management files pre-cached by the caching module 708 include but are not limited to: connection management service files, transmission management service files, and control management service files. Among them, the connection management service file includes commands such as obtaining protocol information (getprotocolinfo) and obtaining current ID (getcurrenID); the transmission management service file includes commands such as setting uniform resource locator (setURL), playing, and stopping messages; The service file includes commands such as volume up command, volume down command, brightness up command, brightness down command, and the like.

In this embodiment, the service management file is read into the cache in advance, so after the user terminal receives the registration request, it can directly return the registration ID, thereby improving the response speed of the user terminal 700 during the service registration process.

It is not difficult to find that this embodiment is a system embodiment corresponding to the fourth embodiment, and this embodiment can be implemented in cooperation with the fourth embodiment. The relevant technical details mentioned in the fourth embodiment are still valid in this embodiment, and will not be repeated here in order to reduce repetition. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied in the fourth embodiment.

It is worth mentioning that all the modules involved in the fifth to eighth embodiments are logical modules. In practical applications, a logical unit can be a physical unit, or a part of a physical unit, or Realized as a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, the fifth to eighth embodiments did not introduce units that are not closely related to solving the technical problems raised by the present invention, but this does not mean that the fifth to eighth embodiments No other units exist.

The ninth embodiment of the present invention relates to a connection establishment system 900, the structure of which is shown in FIG. 9 . The connection establishment system includes: a user terminal 902 and a user terminal 904 . Wherein, the user terminal 902 may be a smart phone, a tablet computer, a personal digital assistant, a wearable device, etc., and the user terminal 904 may be a smart phone. As shown in FIG. 9 , the user terminal 902 includes: a display screen 9022 , a processor 9024 , a communication component 9026 and a memory 9028 . The display screen 9022 may be, for example, a touch screen, which not only has a display function but also a function of receiving user input and control. The processor 9024 is the core of the terminal, which may be implemented by a CPU or the like. The communication component 9026 is used to realize the wireless or wired communication function of the user terminal 902, so that the terminal can interact with the server or other user terminals. Wherein, the memory 9028 is used for storing program codes executable by the processor 9024 or other information. As shown in FIG. 9, the user terminal 904 may include: a display screen 9042, a processor 9044, a transceiver 9046, and a memory 9048, wherein the display screen 9042 is mainly used for displaying content played in the user terminal 904, and the processor 9044 is used for Play video and audio, etc., while the receiver 9046 is used for information interaction with other devices, and the memory 9048 is used to store related information, which may include a cache.

In this embodiment, when the user terminal 902 needs to access the user terminal 904 to operate (such as control), the processor 9024 in the user terminal 902 can broadcast a UDP multicast message through the communication component 9026, the UDP group The IP address and port number of the user terminal 902 may be carried in the broadcast message. After the transceiver 9046 of the user terminal 904 receives the UDP multicast message, the processor 9044 parses the multicast message to obtain the IP address and port number of the user terminal 902 . Next, the processor 9044 returns a response message to the user terminal 902 through the transceiver 9046, and the response message carries the IP address and port number of the user terminal 904. Then, the communication component 9026 of the user terminal 902 receives the response message, and the processor 9024 parses the response message to obtain the IP address and port number of the user terminal 904, thereby realizing the connection between the user terminal 902 and the user terminal 904 Establish.

In this embodiment, when two user terminals (such as a mobile phone and a smart TV) exchange each other's IP addresses and port numbers through multicast messages and response messages, it is confirmed that the two user terminals have established a connection. That is to say, the connection establishment process in this embodiment does not include the existing HTTP creation process and service registration process, thereby simplifying the connection establishment process in the embodiment of the present invention, thereby speeding up the process in the embodiment of the present invention The connection establishment speed between user terminals.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing related hardware through computer programs, and the programs can be stored in a computer-readable storage medium. When the program is executed, it may include the processes of the embodiments of the above-mentioned methods. Wherein, the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM) and the like.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. a kind of user terminal is it is characterised in that include:

Sending module, for sending multicast message, described multicast message includes: an ip address of this user terminal and first Port numbers；

Receiver module, for receiving response message, described response message includes: the 2nd ip address of another user terminal and Two-port netwerk number；

Processing module, for when described receiver module receives described response message, determining and building with described another user terminal Erect connection.

2. user terminal according to claim 1 is it is characterised in that also include in described response message: described another use The service identifiers of family terminal, described service identifiers include following at least one: connection management service identifiers, transfer management service mark Know and control management service identifiers.

3. user terminal according to claim 1 is it is characterised in that also include: Registering modules；

Also include in described response message: at least one service identifiers, for identifying the clothes that described another user terminal is provided Business；

Described Registering modules, after establishing with described another user terminal and be connected in the determination of described processing module, root According to service identifiers selected in service identifiers at least one described, to described another user terminal registration service.

4. a kind of user terminal is it is characterised in that comprise:

Receiver module, for receiving multicast message, described multicast message includes: an ip address of another user terminal and One end slogan；

Sending module, for according to described multicast message, returning response message, described response message to described another user terminal Include: the 2nd ip address of this user terminal and second port number；

Processing module, for when described sending module returns described response message to described another user terminal, determine with Described another user terminal establishes connection.

5. user terminal according to claim 4 is it is characterised in that also include in described response message: this user terminal Service identifiers, and described service identifiers include following at least one: connection management service identifiers, transfer management service identifiers and Control management service identifiers.

6. user terminal according to claim 4 is it is characterised in that also include: cache module；

Also include in described response message: the service identifiers of this user terminal；

Described processing module, after establishing with described another user terminal and be connected in confirmation, accepts described another use The service registration request of family terminal, described service registration request includes: described service identifiers；

Described cache module, before establishing with described another user terminal and be connected in the determination of described processing module, in advance First cache described service identifiers corresponding Service Management file.

7. a kind of connection establishment method, for first user terminal it is characterised in that comprising:

Send multicast message, described multicast message includes: an ip address of described first user terminal and first end slogan；

Receive response message, described response message includes: the 2nd ip address of second user terminal and second port number；And

When receiving described response message, determination is established with described second user terminal and is connected.

8. connection establishment method according to claim 7 is it is characterised in that also include in described response message: described The service identifiers of two user terminals, described service identifiers include following at least one: connection management service identifiers, transfer management clothes Business mark and control management service identifiers.

9. a kind of connection establishment method, for second user terminal it is characterised in that comprising:

Receiving multicast message, described multicast message includes: an ip address of first user terminal and first end slogan；

According to described multicast message, return response message to described first user terminal, described response message includes: described the 2nd ip address of two user terminals and second port number；And

When returning described response message to described first user terminal, determine and establish even with described first user terminal Connect.

10. connection establishment method according to claim 9 is it is characterised in that also include in described response message: described The service identifiers of two user terminals, described service identifiers include following at least one: connection management service identifiers, transfer management clothes Business mark and control management service identifiers.