WO2012037790A1 - Method,apparatus and system for digital tv terminals to perform instant messaging - Google Patents

Abstract

The embodiments of the present invention disclose a method, an apparatus and a system for digital TV terminals to perform instant messaging. Wherein, the method for digital TV terminals to perform instant messaging includes: a first digital TV terminal sends a Session Initiation Protocol (SIP) registration message to an SIP registration server for requesting to register to the SIP registration server (210); if the registration is successful, the first digital TV terminal queries an online server for the online state of a second digital TV terminal (220); if determining that the second digital TV terminal is in an online state, the first digital TV terminal triggers the establishment of an instant messaging session with the second digital TV terminal (230). The solutions of the embodiments of the present invention can provide instant messaging services for users by digital TV terminals.

Description

 Method, device and system for real-time communication of digital television terminal. The present application claims to be submitted to the Chinese Patent Office on September 26, 2010, application number 201010295034.X, and the invention name is "digital television terminal for instant communication method, device and system The priority of the Chinese Patent Application, the entire contents of which is incorporated herein by reference.

Technical field

 The present invention relates to the field of digital television technologies, and in particular, to a method, apparatus and system for instant messaging by a digital television terminal.

Background technique

 At present, with the planning and deployment of the Internet, telecommunications network and the three networks of the grid, operators hope to provide users with more convenient instant messaging services based on the triple play platform.

 The Internet Engineering Task Force (IETF), the Session Initiation Protocol (SIP), is an application layer control protocol based on Internet Protocol. SIP is a plain text-based signaling protocol that manages meetings and the like on different access networks. This meeting can be any type of communication between terminal devices, such as video conferencing, instant messaging, or collaborative meetings.

 With the popularization of digital TV, digital TV terminals (such as set-top boxes) have existed in large numbers in thousands of households. Due to the diversification of user communication requirements, how to provide instant messaging services to users through digital TV terminals is a very important technical issue.

SUMMARY OF THE INVENTION Instant messaging services are provided to users through digital television terminals.

 To solve the above technical problem, the embodiment of the present invention provides the following technical solutions:

 A method for instant messaging by a digital television terminal, comprising:

 The first digital television terminal sends an initial session protocol registration message to the initial session protocol registration server, requesting registration to the initial session protocol registration server;

If the registration is successful, the online server is queried for the online status of the second digital television terminal; if the second digital television terminal is queried, the instant communication session with the second digital television terminal is triggered. A digital television terminal comprising:

 a registration module, configured to send an initial session protocol registration message to the initial session protocol registration server, requesting registration to the initial session protocol registration server;

 a querying module, configured to query an online server for an online status of the second digital television terminal after the registration module is successfully registered;

 The session establishing module is configured to trigger, when the query module finds that the second digital television terminal is in an online state, to establish an instant messaging session with the second digital television terminal.

 A wide-area communication system includes: an initial protocol registration server, an online server, and a first digital television terminal and a second digital television terminal;

 The first digital television terminal is configured to send an initial protocol registration message to the initial protocol registration server, requesting registration to the initial session protocol registration server; if the registration is successful, querying the online server for the second digital television terminal The online state; if it is found that the second digital television terminal is online, triggering an instant messaging session with the second digital television terminal.

 It can be seen that, in the embodiment of the present invention, the first digital television terminal sends a SIP registration message to the SIP registration server deployed in the wide-area network, requesting registration to the SIP registration server; if the registration is successful, querying the online server deployed in the wide-area network for the second The online status of the digital television terminal; if it is found that the second digital television terminal is in an online state, triggering an instant communication session with the second digital television terminal. Based on the above mechanism, the first digital television terminal and the second digital television terminal can perform an instant messaging session such as text or audio and video based on SIP, that is, an instant messaging service can be provided to the user through the digital television terminal.

DRAWINGS

 In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

 1 is a schematic diagram of a network topology structure of a wide power grid according to an embodiment of the present invention;

 2 is a schematic flow chart of a method for performing instant messaging by a digital television terminal according to an embodiment of the present invention;

FIG. 3 is a flowchart of another method for performing instant messaging by a digital television terminal according to an embodiment of the present invention; Schematic diagram

 Figure 4-a is a schematic structural diagram of a digital television terminal according to an embodiment of the present invention;

 FIG. 4 is a schematic structural diagram of another digital television terminal according to an embodiment of the present disclosure;

 FIG. 5-a is a schematic diagram of a wide-area communication system according to an embodiment of the present invention;

 FIG. 5-b is a schematic diagram of another wide-area communication system according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION Instant messaging services are provided to users through digital television terminals.

 The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. The embodiments are merely a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Referring to FIG. 1 , FIG. 1 is a schematic diagram of a network topology structure of a wide power grid according to an embodiment of the present invention. A SIP registration server (mainly responsible for registration management functions of a digital television terminal) and an online server can be deployed in a wide power grid. Mainly responsible for the online status management function of the digital TV terminal) and the functional entities such as the SlP server (mainly responsible for the multimedia management function of the digital TV terminal), it can be understood that the SIP registration server, the online server and the SIP conference server and other functional entities Can be deployed as a separate network entity or integrated on the same network entity. Each digital TV terminal can be connected to a SIP registration server, an online server, and a SlP server through a wide-area network. The technical solution of the embodiment of the present invention can be implemented under the topology of a wide-area network as shown in FIG. 1. Among them, software and hardware upgrades can be performed on digital TV terminals, corresponding communication modules, two-way communication interfaces and instant messaging session clients can be added, and necessary instant communication session peripherals (such as headphones, cameras, etc.) can be added to satisfy Basic hardware and software requirements for instant messaging sessions. The method includes: sending, by the first digital television terminal, a SIP registration message to the SIP registration server, requesting registration to the SIP registration server; if the registration is successful, querying the online server for the online status of the second digital television terminal; if the second digital television terminal is queried When online, triggering an instant messaging session with the second digital television terminal. Referring to FIG. 2, specific steps may include:

 210. The first digital television terminal sends a SIP registration message to the SIP registration server, requesting registration to the SIP registration server.

 In an actual application, after the first digital television terminal is powered on, the SIP registration message may be sent to the SIP registration server to request registration to the SIP registration server. The first digital television terminal may carry the identification information of the first digital television terminal and the authentication information (such as a registration password, etc.) in the SIP registration message, and may also carry the communication address information of the first digital television terminal (for example, an Internet Protocol (IP). Internet Protocol) address, port address, etc.).

 The SIP registration server performs authentication registration on the first digital television terminal according to the SIP registration message sent by the first digital television terminal, and notifies the first digital television terminal of the registration result. If the first digital television terminal is successfully registered, the SIP registration server can also save its communication address information and the like.

 220. If the registration is successful, the first digital television terminal queries the online server for the online status of the second digital television terminal;

 In an application scenario, if it is known that the SIP registration server has been successfully registered, the first digital television terminal may send a subscription (SUBSCRIBE) request message to the online server to request to query the online status of the second digital television terminal. The subscription request message carries the identification information of the first digital television terminal and the second digital television terminal; the online server may send, to the first digital television terminal, a notification that carries the indication information of the online status currently announced by the second digital television terminal. (NOTIFY) message, the first digital television terminal is informed of the current online status of the second digital television terminal, and the NOTIFY message may also carry the indication information of the current online status of the digital television terminal of the other friends of the user to which the first digital television terminal belongs. . The friend information of the user to which each digital television terminal belongs may be managed and maintained by an online server or a SIP registration server.

 In addition, if the user of the second digital television terminal has previously been added as a friend by the user of the first digital television terminal, and the subscription request message does not carry the identification information of the second digital television terminal, the online server may default to the first digital television terminal. Sending a NOTIFY message indicating the current online status indication of the digital television terminal (including the second digital television terminal) of all the friends of the user to which the user belongs, the first digital television terminal knowing the current online status of the second digital television terminal accordingly.

Of course, the first digital television terminal can also query the online server for the online status of the second digital television terminal by other means. Optionally, if the registration is successfully registered to the SIP registration server, the first digital television terminal may further send a status announcement request to the online server, where the status announcement request may carry the identification information of the first digital television terminal and the online status of the announcement of the request Instructing information, here, the online status of the first digital television terminal requesting the announcement may be online, busy (busy can be regarded as one of online), offline, and the like. The first digital television terminal can also update its online status to the online server as needed.

 Of course, other digital television terminals may also issue or update their online status to the online server through a status announcement request. For digital TV terminals that are not successfully registered to the SIP registration server, their current online status recorded by the online server can be offline by default.

 230. If it is found that the second digital television terminal is in an online state, the first digital television terminal triggers an instant messaging session with the second digital television terminal.

 In an application scenario, if it is found that the second digital television terminal is in an online state, it indicates that the instant communication session with the second digital television terminal can be currently performed. At this time, the first digital television terminal can trigger the establishment and the second digital television terminal. An instant messaging session between.

 For example, for example, the first digital television terminal can send a text message to the second digital television terminal to trigger a text instant communication session with the second digital television terminal, and the second digital television terminal can reply to the text message, with the first The digital television terminal performs a text instant communication session. The text message exchanged between the first digital television terminal and the second digital television terminal can be forwarded through an online server or a SIP session server or the like.

 For another example, the first digital television terminal may send an invitation (INVITE) message to the SIP session server, where the INVITE message may carry the identification information of the first digital television terminal and the second digital television terminal, and initiate a multimedia call to the second digital television terminal. Triggering to establish a voice instant messaging session or a video instant messaging session with the second digital television terminal, and performing an audio/video instant communication session with the second digital television terminal after the multimedia call is established (eg, performing an IP voice conversation, etc.). That is, the first digital television terminal can establish an audio and/or video instant communication session with the second digital television terminal.

As can be seen from the above, the first digital television terminal in this embodiment sends a SIP registration message to the SIP registration server deployed in the wide-area network, requesting registration to the SIP registration server; if the registration is successful, the second server is queried to the online server deployed on the public network. The online status of the television terminal; if it is found that the second digital television terminal is in an online state, triggering an instant communication session with the second digital television terminal. The first digital television terminal and the second digital television terminal can perform instant messaging such as text or audio and video based on SIP The conversation, that is, the ability to provide instant messaging services to users through digital television terminals.

 In order to facilitate a better understanding of the technical solution of the present invention, a specific process of performing an audio/video instant communication session between the digital television terminal and the digital television terminal B is taken as an example to introduce the technical solution of the embodiment of the present invention in more detail. . An embodiment may include:

 301. The digital television terminal A sends a SIP registration message to the SIP registration server, requesting registration to the SIP registration server;

 In practical applications, after the digital television terminal A is powered on, it can send a SIP registration message to the SIP registration server to request registration to the SIP registration server. The digital television terminal A may carry the identification information and authentication information (such as a registration password) of the digital television terminal A in the SIP registration message, and may also carry the communication address information (for example, an IP address, a port address, etc.) of the digital television terminal A.

 302. The SIP registration server sends a SIP registration response message to the digital television terminal A.

 In an application scenario, the SIP registration server may perform authentication registration on the digital television terminal A according to the SIP registration message sent by the digital television terminal A, and may notify the digital television terminal of the registration result through the SIP registration response message. Wherein, if the digital television terminal A is successfully registered, the SIP registration response message sent by the SIP registration server to the digital television terminal A may be a 200 OK message; if the digital television terminal A registration fails, the SIP registration server sends the SIP registration to the digital television terminal A. The response message can be an Unauthorized message. This embodiment is described by taking a scenario in which the digital television terminal A is successfully registered to the SIP registration server.

 The SIP registration server can also store the communication address information of the successfully registered digital television terminal.

 303. If it is learned that the SIP registration server has been successfully registered, the digital television terminal A sends a status announcement request to the online server.

 In practical applications, the digital television terminal A may carry the identification information of the digital television terminal A and the indication information of the online status of the request announcement in the status announcement request. The online status of the digital TV terminal A requesting the online server announcement may be online, busy, offline, or the like.

The online server may record or update its online status according to the identification information of the digital television terminal A carried in the status announcement request and the indication information of the online status of the announcement. Digital TV Terminal A can also update its online status to the online server as needed. 304. The digital television terminal B sends a SIP registration message to the SIP registration server, requesting registration to the SIP registration server;

 The digital television terminal B can send a SIP registration message to the SIP registration server after powering on, requesting to register with the SIP registration server. The digital television terminal B may carry the identification information and authentication information (such as a registration password) of the digital television terminal B in the SIP registration message, and may also carry the communication address information (for example, an IP address, a port address, etc.) of the digital television terminal B.

 305. The SIP registration server sends a SIP registration response message to the digital television terminal B.

 In an application scenario, the SIP registration server may perform authentication registration on the digital television terminal B according to the SIP registration message sent by the digital television terminal B, and may notify the digital television terminal B of the registration result through the SIP registration response message. Wherein, if the digital television terminal B is successfully registered, the SIP registration response message sent by the SIP registration server to the digital television terminal B may be a 200 OK message; if the digital television terminal B fails to register, the SIP registration server sends the SIP registration to the digital television terminal B. The response message can be an Unauthorized message. This embodiment is described by taking the scenario where the digital television terminal B successfully registers with the SIP registration server as an example.

 306. If it is learned that the SIP registration server has been successfully registered, the digital television terminal B sends a status announcement request to the online server.

 In practical applications, the digital television terminal B may carry the identification information of the digital television terminal B and the indication information of the online status of the announcement of the announcement in the status announcement request. The online status of the digital TV terminal B requesting the online server announcement may be online, busy, offline, or the like.

 The online server may record or update its online status according to the identification information of the digital television terminal B carried in the status announcement request and the indication information of the online status of the announcement. The digital TV terminal B can also update its online status to the online server as needed.

 Of course, other digital television terminals may also issue or update their online status to the online server through a status announcement request. For digital TV terminals that are not successfully registered to the SIP registration server, their current online status recorded by the online server can be offline by default.

 It can be understood that there is no necessary sequence between steps 301-303 and steps 304-306. Steps 304-306 may be performed before steps 301-303, or may be performed simultaneously or cross-executed.

307. The digital television terminal A sends a subscription SUBSCRIBE request message to the online server, and requests to query the online status of the digital television terminal B. In an application scenario, the digital television terminal A may carry the identification information of the digital television terminal A and the digital television terminal B in the SUBSCRIBE request message to request to query the online status of the digital television terminal B, and of course, the SUBSCRIBE request message may also be used. Carry other information.

 308. The online server sends a notification NOTIFY message to the digital television terminal AJ.

 The online server may query the online status of the digital television terminal B that is currently announced according to the identification information of the digital television terminal B carried in the SUBSCRIBE request message, and may carry the digital television terminal B in the notification NOTIFY message sent to the digital television terminal. The indication of the currently announced online status. The digital television terminal A can know the current online state of the digital television terminal B according to the indication information of the online status of the digital television terminal B carried in the received NOTIFY message.

 Further, the online server may further carry the indication information of the current online status of the digital television terminal of the other friends of the user of the digital television terminal A in the NOTIFY message. The digital television terminal A can then know the current online status of all friends of the user to which it belongs.

 The friend information of the user to which each digital television terminal belongs may be managed and maintained by an online server or a SIP registration server.

 In addition, if the user of the digital television terminal B has previously been added as a friend by the user of the digital television terminal A, and the subscription request message does not carry the identification information of the digital television terminal B, the online server may send the digital television terminal AJ to the digital television terminal by default. The digital television terminal A can know the current online status of the digital television terminal B based on the NOTIFY message of the current online status indication information of all the friends' digital television terminals (including the digital television terminal B).

 309. If it is found that the digital television terminal B is in the online state, the digital television terminal A sends an invitation INVITE message to the SIP session server, and initiates a multimedia call to the digital television terminal B.

 If it is found that the digital television terminal B is in the online state, it indicates that the instant communication session with the digital television terminal B can be currently performed. At this time, the digital television terminal A can trigger the establishment of an instant communication session with the digital television terminal B.

 The digital television terminal A sends an invitation INVITE message to the SIP session server, and the INVITE message can carry the identification information of the digital television terminal A and the digital television terminal B to initiate a multimedia call to the digital television terminal B, triggering the establishment between the digital television terminal B and the digital television terminal B. The audio and video instant messaging session, for example, can initiate an IP voice session with the digital television terminal B.

310. The SIP session server sends an INVITE message to the digital television terminal B. 311. The digital television terminal B receives the INVITE message, and sends a OO Trying message (a response of the INVITE message) to the SIP session server.

 The SIP session server receives and forwards the lOOTrying message to the digital television terminal A;

 312. The digital television terminal B rings and sends a 180 Ringing message to the SIP session server; the SIP session server receives and forwards the 180Ringing message to the digital television terminal A, and the digital television terminal A can play the ring back tone.

 313. When the digital television terminal B goes off-hook, send a 200 OK response to the SIP session server; the SIP session server receives and forwards the 200 OK response to the digital television terminal A;

 314. The digital television terminal A and the digital television terminal B perform a multimedia instant communication session.

 In practical applications, the multimedia session data between the digital television terminal A and the digital television terminal B can be carried by a real-time transport protocol (RTP) packet, and of course, can also be carried by other formats.

 When the digital television terminal 挂 and any party of the digital television terminal B hang up, the session is terminated.

 It can be seen that, in this embodiment, the digital television terminal sends a SIP registration message to the SIP registration server deployed in the wide-area network, requesting registration to the SIP registration server; if the registration is successful, querying the online server deployed in the wide-area network for another digital television. The online status of the terminal; if it is found that another digital television terminal is online, triggering an instant communication session with another digital television terminal. Based on the above mechanism, two digital television terminals can conduct multimedia instant messaging sessions based on SIP, that is, they can provide instant messaging services for users on the wide grid through digital television terminals.

 In order to facilitate the implementation of the above technical solution of the embodiments of the present invention, an embodiment of the present invention further provides a digital television terminal and a wide-area communication system.

 Referring to FIG. 4-a, a digital television terminal 400 according to an embodiment of the present invention may include: a registration module 410, configured to send a SIP registration message to an initial session protocol SIP registration server, requesting registration to the SIP registration server;

 The query module 420 is configured to query the online server for the online status of the second digital television terminal after the registration module 410 is successfully registered;

 The session establishing module 430 is configured to, when the query module 420 queries that the second digital television terminal is in an online state, trigger an instant messaging session with the second digital television terminal.

In an application scenario, referring to FIG. 4-b, the digital television terminal 400 may further include: The status announcement module 440 is configured to send a status announcement request to the online server after the registration module 410 successfully registers, the status announcement request carrying the identification information of the digital television terminal 400 and the indication information of the online status of the announcement.

 In an application scenario, the query module 420 can include: a transmitting submodule and a receiving submodule (not shown).

 The sending submodule is configured to send a SUBSCRIBE request message to the online server, where the SUBSCRIBE request message carries the identifier information of the second digital television terminal;

 The receiving submodule is configured to receive a notification NOTIFY message sent by the online server, where the NOTIFY message carries indication information of a current online status of the second digital television terminal.

 In an application scenario, the session establishing module 430 may include one or more of the following triggering modules: a first triggering submodule for triggering text instant communication with the second digital television terminal.

 a second triggering submodule, configured to trigger a voice instant communication between the second digital television terminal and the second digital television terminal;

 a third trigger sub-module, configured to trigger video instant communication with the second digital television terminal

^ Tong.

 The second trigger submodule or the third trigger submodule is specifically configured to send an invite INVITE message to the SIP conference server, where the INVITE message carries the identifier information of the second digital television terminal, to trigger establishment between the second digital television terminal and the second digital television terminal. Audio and video instant messaging sessions.

 It can be understood that the digital television terminal 400 of this embodiment may be a digital television terminal in the foregoing method embodiment, which may be used to implement all the technical solutions in the method embodiments, and the functions of the various functional modules may be implemented by the foregoing method. The method in the example is specifically implemented, and the specific implementation process can refer to the related description in the foregoing embodiment, and is not further described herein.

 Referring to FIG. 5-a, a wide-area communication system provided by an embodiment of the present invention may include: a SIP registration server 510, an online server 520, and a first digital television terminal 530 and a second digital television terminal 540;

The first digital television terminal 530 is configured to send a SIP registration message to the SIP registration server 510, requesting registration to the SIP registration server 510; if the registration is successful, querying the online server 520 for the online status of the second digital television terminal 540; When the two digital television terminals 540 are in an online state, the trigger is built. An instant messaging session between the second digital television terminal 540 and the second digital television terminal 540.

 In an application scenario, referring to FIG. 5-b, the wide-area communication system may further include a SIP server 550, and the first digital television terminal 530 may send an invitation INVITE message to the SIP conference server 550, where the INVITE message carries the second number. The identification information of the television terminal is used to trigger an audio and video instant communication session with the second digital television terminal.

 It can be understood that the respective entities of the wide-area network communication system in this embodiment may be corresponding entities in the foregoing method embodiments, which may be used to implement all the technical solutions in the method embodiments, and the functions of the respective functional modules may be according to the foregoing methods. The method in the embodiment is specifically implemented. For the specific implementation process, refer to the related description in the foregoing embodiment, and details are not described herein again.

 It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because certain steps may be performed in other sequences or concurrently in accordance with the present invention. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

 In the above embodiments, the descriptions of the various embodiments are different, and the details are not described in detail in an embodiment, and the related descriptions of other embodiments can be referred to.

 In summary, in the embodiment of the present invention, the digital television terminal sends a SIP registration message to the SIP registration server deployed in the wide-area network, requesting registration to the SIP registration server; if the registration is successful, querying the online server deployed in the wide-area network for another digital television. The online status of the terminal; if it is found that another digital television terminal is online, triggering an instant communication session with another digital television terminal. Based on the above mechanism, two digital television terminals can perform text or multimedia instant communication conversations based on SIP, that is, they can provide instant messaging services for users on the wide-area network through digital television terminals.

A person skilled in the art may understand that all or part of the various steps of the foregoing embodiments may be completed by a program instructing related hardware. The program may be stored in a computer readable storage medium, and the storage medium may include: Read-only memory, random access memory, disk or optical disk, etc. The foregoing description of the method and apparatus for performing instant messaging on a digital television terminal provided by an embodiment of the present invention, and the description of the above embodiments are merely for helping to understand the method of the present invention and its core idea; and, at the same time, those skilled in the art According to the idea of the present invention, in the specific embodiment and application range There is a change in the above, and the contents of the present specification should not be construed as limiting the invention.

Claims

Rights request

 A method for performing instant messaging by a digital television terminal, comprising: transmitting, by a first digital television terminal, an initial session protocol registration message to an initial session protocol registration server, requesting registration to the initial session protocol registration server;

 If the registration is successful, the online server is queried for the online status of the second digital television terminal; if the second digital television terminal is queried, the instant communication session with the second digital television terminal is triggered.

 The method according to claim 1, wherein the method further comprises: if the registration is successful, sending a status announcement request to the online server, where the status announcement request carries the identification information of the first digital television terminal and the request thereof The indication of the online status of the announcement.

 The method according to claim 1, wherein the querying the online server for the online status of the second digital television terminal is specifically:

 Sending a subscription request message to the online server, where the subscription request message carries the identification information of the second digital television terminal;

 Receiving, by the online server, a notification message, where the notification message carries indication information of a current online status of the second digital television terminal.

 The method according to claim 1, wherein the triggering establishes an instant messaging session with the second digital television terminal, including:

 Triggering to establish a text instant messaging session with the second digital television terminal; or,

 Triggering to establish a voice instant messaging session with the second digital television terminal; or,

 Triggering to establish a video instant messaging session with the second digital television terminal.

 The method according to claim 4, wherein the triggering establishes a voice instant messaging session with the second digital television terminal, including:

 Sending an invitation message to the initial session protocol conference server, the invitation message carrying the identification information of the second digital television terminal.

 6. A digital television terminal, comprising:

 a registration module, configured to send an initial session protocol registration message to the initial session protocol registration server, requesting registration to the initial session protocol registration server;

a query module, configured to query the online server for the second number after the registration module is successfully registered The online status of the television terminal;

 The session establishing module is configured to trigger, when the query module finds that the second digital television terminal is in an online state, to establish an instant messaging session with the second digital television terminal.

 The digital television terminal according to claim 6, further comprising:

 The status announcement module is configured to send a status announcement request to the online server after the registration module is successfully registered, where the status announcement request carries the identification information of the digital television terminal and the indication information of the online status of the announcement.

 The digital television terminal according to claim 6, wherein the query module comprises: a sending submodule, configured to send a subscription request message to the online server, where the subscription request message carries the identifier of the second digital television terminal Information

 And a receiving submodule, configured to receive a notification message sent by the online server, where the notification message carries indication information of a current online state of the second digital television terminal.

 The digital television terminal according to any one of claims 6 to 8, wherein the session establishing module comprises one or more of the following triggering modules:

 a first triggering submodule, configured to trigger a text instant communication session with the second digital television terminal;

 a second triggering submodule, configured to trigger a voice instant messaging session with the second digital television terminal;

 The third trigger sub-module is configured to trigger a video instant communication with the second digital television terminal.

 10. A wide-area network communication system, comprising: an initial protocol registration server, an online server, and a first digital television terminal and a second digital television terminal;

 The first digital television terminal is configured to send an initial protocol registration message to the initial protocol registration server, requesting registration to the initial session protocol registration server; if the registration is successful, querying the online server for the second digital television terminal The online state; if it is found that the second digital television terminal is online, triggering an instant messaging session with the second digital television terminal.