CN110445806B

CN110445806B - Method and device for calling internet terminal and protocol conversion server

Info

Publication number: CN110445806B
Application number: CN201910779731.3A
Authority: CN
Inventors: 乔金龙; 杨春晖; 么学佳; 解君
Original assignee: Visionvera Information Technology Co Ltd
Current assignee: Visionvera Information Technology Co Ltd
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2022-03-01
Anticipated expiration: 2039-08-22
Also published as: CN110445806A

Abstract

The invention provides a method, a device and a protocol conversion server for calling an internet terminal, relating to the technical field of video networking, wherein the method comprises the following steps: converting the call request into first call signaling conforming to a call admission state protocol; converting the destination address into an address of the target internet terminal in a state of being connected with the local area network to obtain a second call signaling, and sending the second call signaling to the target internet terminal; receiving a response signaling replied by the target internet terminal aiming at the second call signaling; and converting the response signaling into a call response signaling conforming to the video networking protocol, and sending the call response signaling to the video networking server so that the video networking server sends the call response signaling to the target video networking terminal. The target video network terminal can be established to the video network server and then to the coordination server, and then to the communication channel of the target internet terminal, so that the target video network terminal in the wide area network can pass through the firewall between the wide area network and the local area network, and directly call the target internet equipment in the local area network.

Description

Method and device for calling internet terminal and protocol conversion server

Technical Field

The invention relates to the technical field of video networking, in particular to a method and a device for calling an internet terminal and a protocol conversion server.

Background

With the development of the technical field of video networking, the real-time high-definition video exchange technology in the technical field of video networking is also developed. The real-time high-definition video exchange technology can realize the real-time interconnection and intercommunication of the whole network high-definition video communication which cannot be realized in the technical field of the internet.

At present, for the security of the internet device in use, the internet device requires to open the firewall function to protect the internet device in the local area network from being randomly called by the device in the wide area network, so that the video networking device in the wide area network cannot randomly call the internet device in the local area network.

Disclosure of Invention

In view of the above problems, embodiments of the present invention are proposed to provide a method, an apparatus, and a collaboration server for calling an internet terminal that overcome or at least partially solve the above problems.

In order to solve the above problem, an embodiment of the present invention discloses a method for calling an internet terminal, which is applied to a collaboration server, and the method includes:

under the condition that the protocol conversion server is simultaneously accessed to the video network and the Internet, receiving a call request of a target video network terminal to a target Internet terminal, which is sent by the video network server; the call request is sent to the video network server by the target video network terminal; the target internet terminal is positioned in a local area network, and the target video network terminal is positioned in a wide area network outside the local area network; the protocol conversion server is legal equipment which can pass through a firewall of the local area network;

converting the call request into first call signaling conforming to a call admission state protocol;

when the destination address in the first call signaling is the address of the target internet terminal in the state of connecting the target internet terminal with the wide area network, converting the destination address into the address of the target internet terminal in the state of connecting the target internet terminal with the local area network to obtain a second call signaling;

sending the second call signaling to the target internet terminal;

receiving a response signaling replied by the target internet terminal aiming at the second call signaling;

converting the answer signaling into call response signaling conforming to a video networking protocol;

and sending the call response signaling to the video networking server so that the video networking server sends the call response signaling to the target video networking terminal, and when receiving the call response signaling, the target video networking terminal sequentially passes through the video networking server and the coordination server to carry out call operation on the target internet terminal.

The embodiment of the invention discloses a method for calling an internet terminal, which is applied to a calling system, wherein the calling system comprises a target video network terminal, a video network server, a protocol server and a target internet terminal which are connected in sequence; the target internet terminal is positioned in a local area network, and the target video network terminal is positioned in a wide area network outside the local area network; the protocol conversion server is legal equipment which can pass through a firewall of the local area network; the method comprises the following steps:

the target video network terminal sends a call request to the target internet terminal to the video network server;

the protocol conversion server receives a call request of a target video network terminal to a target internet terminal, which is sent by the video network server, under the condition that the video network and the internet are accessed simultaneously;

the protocol conversion server converts the call request into a first call signaling conforming to a call admission state protocol;

when the destination address in the first call signaling is the address of the target internet terminal in the state of connecting the target internet terminal with the wide area network, the coordination and transformation server converts the destination address into the address of the target internet terminal in the state of connecting the target internet terminal with the local area network, and a second call signaling is obtained;

the coordination transfer server sends the second call signaling to the target internet terminal;

the target internet terminal replies a response signaling to the coordination server aiming at the second call signaling;

when the protocol conversion server receives the response signaling, the response signaling is converted into a call response signaling following the video networking protocol;

the coordination server sends the call response signaling to the video networking server;

the video networking server sends the call response signaling to the target video networking terminal;

and when receiving the call response signaling, the target video networking terminal carries out call operation on the target Internet terminal sequentially through the video networking server and the coordination server.

The embodiment of the invention also discloses a device for calling the internet terminal, which comprises:

the first receiving module is used for receiving a call request of a target video network terminal to a target internet terminal, which is sent by the video network server, under the condition that the protocol conversion server is simultaneously accessed to the video network and the internet; the calling request is sent to the video networking server by the target video networking terminal; the target internet terminal is positioned in a local area network, and the target video network terminal is positioned in a wide area network outside the local area network; the protocol conversion server is legal equipment which can pass through a firewall of the local area network;

a first conversion module, configured to convert the call request into call signaling compliant with a call admission state protocol;

a second conversion module, configured to, when a destination address in the first call signaling is an address in a state where the target internet terminal is connected to the wide area network, convert the destination address into an address in a state where the target internet terminal is connected to the local area network, and obtain a second call signaling;

the first sending module is used for sending the second call signaling to the target internet terminal;

a second receiving module, configured to receive a response signaling replied by the target internet terminal for the second call signaling;

a third conversion module, configured to convert the response signaling into a call response signaling compliant with the video networking protocol;

and the second sending module is used for sending the call response signaling to the video networking server so that the video networking server sends the call response signaling to the target video networking terminal, and the target video networking terminal receives the call response signaling and then sequentially passes through the video networking server and the coordination server to carry out call operation on the target internet terminal.

The embodiment of the invention discloses a collaboration server, which comprises a processor, a memory and a computer program which is stored on the memory and can run on the processor, wherein the computer program realizes the steps of the method for calling the internet terminal when being executed by the processor.

The embodiment of the invention has the following advantages:

in the embodiment of the invention, the target video network terminal sends a first call request to the protocol conversion server through the video network server, can receive the first call request and convert the first call request into a call admission state protocol signaling, when a destination address in the first call signaling is an address in a state that the target video network terminal is connected with a wide area network, the destination address is converted into an address in a state that the target video network terminal is connected with a local area network, a second call signaling is obtained, the second call signaling is sent to the target video network terminal, the target video network terminal can reply a corresponding response signaling when receiving the second call signaling, and then the protocol conversion server can convert the response signaling into a call response signaling following the video network protocol and send the call response signaling to the video network server, so that the video network server sends the call response signaling to the target video network terminal, therefore, the target video network terminal can be established to the video network server and then to the cooperative server, and further to the communication channel of the target internet terminal, so that the target video network terminal can call the target internet terminal through the communication channel, and thus, the target video network terminal in the wide area network can pass through the firewall between the wide area network and the local area network, and the target internet equipment in the local area network can be directly called.

Drawings

FIG. 1 is a schematic networking diagram of a video network of the present invention;

FIG. 2 is a schematic diagram of a hardware architecture of a node server according to the present invention;

fig. 3 is a schematic diagram of a hardware structure of an access switch of the present invention;

fig. 4 is a schematic diagram of a hardware structure of an ethernet protocol conversion gateway according to the present invention;

fig. 5 is a flowchart of a method for calling an internet terminal according to an embodiment of the present invention;

fig. 6 is a flowchart of a method for calling an internet terminal according to a second embodiment of the present invention;

fig. 7 is a signaling transmission diagram of a calling internet terminal according to a second embodiment of the present invention;

fig. 8 is a flowchart of a method for calling an internet terminal according to a third embodiment of the present invention;

fig. 9 is a schematic structural diagram of a calling system according to a third embodiment of the present invention;

fig. 10 is a schematic structural diagram of an apparatus for calling an internet terminal according to a fourth embodiment of the present invention;

fig. 11 is a schematic structural diagram of an apparatus for calling an internet terminal according to a fourth embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

The video networking is an important milestone for network development, is a real-time network, can realize high-definition video real-time transmission, and pushes a plurality of internet applications to high-definition video, and high-definition faces each other.

The video networking adopts a real-time high-definition video exchange technology, can integrate required services such as dozens of services of video, voice, pictures, characters, communication, data and the like in a system on a network system, such as high-definition video conference, video monitoring, intelligent monitoring analysis, emergency command, digital broadcast television, delayed television, network teaching, live broadcast, VOD on demand, television mail, Personal Video Recorder (PVR), intranet (self-office) channels, intelligent video broadcast control, information distribution and the like, and realizes high-definition quality video broadcast through a television or a computer.

To better understand the embodiments of the present invention, the following description refers to the internet of view:

some of the technologies applied in the video networking are as follows:

network Technology (Network Technology)

Network technology innovation in video networking has improved over traditional Ethernet (Ethernet) to face the potentially enormous video traffic on the network. Unlike pure network Packet Switching (Packet Switching) or network Circuit Switching (Circuit Switching), the Packet Switching is adopted by the technology of the video networking to meet the Streaming requirement. The video networking technology has the advantages of flexibility, simplicity and low price of packet switching, and simultaneously has the quality and safety guarantee of circuit switching, thereby realizing the seamless connection of the whole network switching type virtual circuit and the data format.

Switching Technology (Switching Technology)

The video network adopts two advantages of asynchronism and packet switching of the Ethernet, eliminates the defects of the Ethernet on the premise of full compatibility, has end-to-end seamless connection of the whole network, is directly communicated with a user terminal, and directly bears an IP data packet. The user data does not require any format conversion across the entire network. The video networking is a higher-level form of the Ethernet, is a real-time switching system, can realize the large-scale high-definition video real-time transmission of the whole network which can not be realized by the existing Internet, and pushes a plurality of network video applications to high-definition and unification.

Server Technology (Server Technology)

The server technology on video networking and unified video system is different from the traditional server, the streaming media transmission is established on the basis of connection orientation, the data processing capacity is independent of flow and communication time, and a single network layer can contain signaling and data transmission. For voice and video services, the complexity of streaming media processing of video networking and unified video systems is much simpler than that of data processing, and the efficiency is greatly improved by more than one hundred times compared with that of a traditional server.

Storage Technology (Storage Technology)

The super-high speed memory technology of the unified video system adopts the most advanced real-time operating system in order to adapt to the media content with super-large capacity and super-large flow, the program information in the server instruction is mapped to the specific hard disk space, the media content is not passed through the server any more, and is instantly and directly sent to the user terminal, and the user waiting time is less than 0.2 second. The optimized sector distribution greatly reduces the mechanical motion of the magnetic head track seeking of the hard disk, the resource consumption only accounts for 20% of that of the IP internet of the same grade, but concurrent flow which is 3 times larger than that of the traditional hard disk array is generated, and the comprehensive efficiency is improved by more than 10 times.

Network Security Technology (Network Security Technology)

The structural design of the video network completely eliminates the network security problem troubling the internet structurally by the modes of independent service permission control each time, complete isolation of equipment and user data and the like, generally does not need antivirus programs and firewalls, avoids the attack of hackers and viruses, and provides a structural carefree security network for users.

Service Innovation Technology (Service Innovation Technology)

The unified video system integrates services and transmission, and is not only automatically connected once whether a single user, a private network user or a network aggregate. The user terminal, the set-top box or the PC are directly connected to the unified video system to obtain various multimedia video services in various forms. The unified video system adopts a menu type matching table mode to replace the traditional complex application programming, can realize complex application by using very few codes, and realizes new infinite business innovation.

Networking of the video network is as follows:

the video network is a centralized control network structure, and the network can be a tree network, a star network, a ring network and the like, but on the basis of the centralized control node, the whole network is controlled by the centralized control node in the network.

As shown in fig. 1, the video network is divided into an access network and a metropolitan network.

The devices of the access network part can be mainly classified into 3 types: node server, access switch, terminal (including various set-top boxes, coding boards, memories, etc.). The node server is connected to an access switch, which may be connected to a plurality of terminals and may be connected to an ethernet network.

The node server is a node which plays a centralized control function in the access network and can control the access switch and the terminal. The node server can be directly connected with the access switch or directly connected with the terminal.

Similarly, devices of the metropolitan network portion may also be classified into 3 types: a metropolitan area server, a node switch and a node server. The metro server is connected to a node switch, which may be connected to a plurality of node servers.

The node server is a node server of the access network part, namely the node server belongs to both the access network part and the metropolitan area network part.

The metropolitan area server is a node which plays a centralized control function in the metropolitan area network and can control a node switch and a node server. The metropolitan area server can be directly connected with the node switch or directly connected with the node server.

Therefore, the whole video network is a network structure with layered centralized control, and the network controlled by the node server and the metropolitan area server can be in various structures such as tree, star and ring.

The access network part can form a unified video system (the part in the dotted circle), and a plurality of unified video systems can form a video network; each unified video system may be interconnected via metropolitan and wide area video networks.

Video networking device classification

1.1 devices in the video network of the embodiment of the present invention can be mainly classified into 3 types: server, exchanger (including Ethernet protocol conversion gateway), terminal (including various set-top boxes, code board, memory, etc.). The video network as a whole can be divided into a metropolitan area network (or national network, global network, etc.) and an access network.

1.2 wherein the devices of the access network part can be mainly classified into 3 types: node server, access exchanger (including Ethernet protocol conversion gateway), terminal (including various set-top boxes, coding board, memory, etc.).

The specific hardware structure of each access network device is as follows:

a node server:

as shown in fig. 2, the system mainly includes a network interface module 201, a switching engine module 202, a CPU module 203, and a disk array module 204;

the network interface module 201, the CPU module 203, and the disk array module 204 all enter the switching engine module 202; the switching engine module 202 performs an operation of looking up the address table 205 on the incoming packet, thereby obtaining the direction information of the packet; and stores the packet in a queue of the corresponding packet buffer 206 based on the packet's steering information; if the queue of the packet buffer 206 is nearly full, it is discarded; the switching engine module 202 polls all packet buffer queues for forwarding if the following conditions are met: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero. The disk array module 204 mainly implements control over the hard disk, including initialization, read-write, and other operations on the hard disk; the CPU module 203 is mainly responsible for protocol processing with an access switch and a terminal (not shown in the figure), configuring an address table 205 (including a downlink data packet address table, an uplink data packet address table, and a data packet address table), and configuring the disk array module 204.

The access switch:

as shown in fig. 3, the network interface module mainly includes a network interface module (a downlink network interface module 301 and an uplink network interface module 302), a switching engine module 303 and a CPU module 304;

wherein, the packet (uplink data) coming from the downlink network interface module 301 enters the packet detection module 305; the packet detection module 305 detects whether the Destination Address (DA), the Source Address (SA), the packet type, and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id) and enters the switching engine module 303, otherwise, discards the stream identifier; the packet (downstream data) coming from the upstream network interface module 302 enters the switching engine module 303; the incoming data packet of the CPU module 304 enters the switching engine module 303; the switching engine module 303 performs an operation of looking up the address table 306 on the incoming packet, thereby obtaining the direction information of the packet; if the packet entering the switching engine module 303 is from the downstream network interface to the upstream network interface, the packet is stored in the queue of the corresponding packet buffer 307 in association with the stream-id; if the queue of the packet buffer 307 is nearly full, it is discarded; if the packet entering the switching engine module 303 is not from the downlink network interface to the uplink network interface, the data packet is stored in the queue of the corresponding packet buffer 307 according to the guiding information of the packet; if the queue of the packet buffer 307 is nearly full, it is discarded.

The switching engine module 303 polls all packet buffer queues, which in this embodiment of the present invention is divided into two cases:

if the queue is from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queued packet counter is greater than zero; 3) obtaining a token generated by a code rate control module;

if the queue is not from the downlink network interface to the uplink network interface, the following conditions are met for forwarding: 1) the port send buffer is not full; 2) the queue packet counter is greater than zero.

The rate control module 308 is configured by the CPU module 304, and generates tokens for packet buffer queues from all downstream network interfaces to upstream network interfaces at programmable intervals to control the rate of upstream forwarding.

The CPU module 304 is mainly responsible for protocol processing with the node server, configuration of the address table 306, and configuration of the code rate control module 308.

Ethernet protocol conversion gateway：

As shown in fig. 4, the apparatus mainly includes a network interface module (a downlink network interface module 401 and an uplink network interface module 402), a switching engine module 403, a CPU module 404, a packet detection module 405, a rate control module 408, an address table 406, a packet buffer 407, a MAC adding module 409, and a MAC deleting module 410.

Wherein, the data packet coming from the downlink network interface module 401 enters the packet detection module 405; the packet detection module 405 detects whether the ethernet MAC DA, the ethernet MAC SA, the ethernet length or frame type, the video network destination address DA, the video network source address SA, the video network packet type, and the packet length of the packet meet the requirements, and if so, allocates a corresponding stream identifier (stream-id); then, the MAC deletion module 410 subtracts MAC DA, MAC SA, length or frame type (2byte) and enters the corresponding receiving buffer, otherwise, discards it;

the downlink network interface module 401 detects the sending buffer of the port, and if there is a packet, obtains the ethernet MAC DA of the corresponding terminal according to the destination address DA of the packet, adds the ethernet MAC DA of the terminal, the MAC SA of the ethernet protocol gateway, and the ethernet length or frame type, and sends the packet.

The other modules in the ethernet protocol gateway function similarly to the access switch.

A terminal:

the system mainly comprises a network interface module, a service processing module and a CPU module; for example, the set-top box mainly comprises a network interface module, a video and audio coding and decoding engine module and a CPU module; the coding board mainly comprises a network interface module, a video and audio coding engine module and a CPU module; the memory mainly comprises a network interface module, a CPU module and a disk array module.

1.3 devices of the metropolitan area network part can be mainly classified into 2 types: node server, node exchanger, metropolitan area server. The node switch mainly comprises a network interface module, a switching engine module and a CPU module; the metropolitan area server mainly comprises a network interface module, a switching engine module and a CPU module.

2. Video networking packet definition

2.1 Access network packet definition

The data packet of the access network mainly comprises the following parts: destination Address (DA), Source Address (SA), reserved bytes, payload (pdu), CRC.

As shown in the following table, the data packet of the access network mainly includes the following parts:

DA

SA

Reserved

Payload

CRC

wherein:

the Destination Address (DA) is composed of 8 bytes (byte), the first byte represents the type of the data packet (such as various data packets, multicast data packets, unicast data packets, etc.), there are 256 possibilities at most, the second byte to the sixth byte are metropolitan area network addresses, and the seventh byte and the eighth byte are access network addresses;

the Source Address (SA) is also composed of 8 bytes (byte), defined as the same as the Destination Address (DA);

the reserved byte consists of 2 bytes;

the payload part has different lengths according to different types of datagrams, and is 64 bytes if various data packets are available, and is 32+1024 or 1056 bytes if a single multicast data packet is available, but of course, the length is not limited to the above 2 types;

the CRC consists of 4 bytes and is calculated in accordance with the standard ethernet CRC algorithm.

2.2 metropolitan area network packet definition

The topology of a metropolitan area network is a graph and there may be 2, or even more than 2, connections between two devices, i.e., there may be more than 2 connections between a node switch and a node server, a node switch and a node switch, and a node switch and a node server. However, the metro network address of the metro network device is unique, and in order to accurately describe the connection relationship between the metro network devices, parameters are introduced in the embodiment of the present invention: a label to uniquely describe a metropolitan area network device.

In this specification, the definition of the Label is similar to that of the Label of MPLS (Multi-Protocol Label Switch), and assuming that there are two connections between the device a and the device B, there are 2 labels for the packet from the device a to the device B, and 2 labels for the packet from the device B to the device a. The label is classified into an incoming label and an outgoing label, and assuming that the label (incoming label) of the packet entering the device a is 0x0000, the label (outgoing label) of the packet leaving the device a may become 0x 0001. The network access process of the metro network is a network access process under centralized control, that is, address allocation and label allocation of the metro network are both dominated by the metro server, and the node switch and the node server are both passively executed, which is different from label allocation of MPLS, and label allocation of MPLS is a result of mutual negotiation between the switch and the server.

As shown in the following table, the data packet of the metro network mainly includes the following parts:

DA

SA

Reserved

label (R)

Payload

CRC

Namely Destination Address (DA), Source Address (SA), Reserved byte (Reserved), tag, payload (pdu), CRC. The format of the tag may be defined by reference to the following: the tag is 32 bits with the upper 16 bits reserved and only the lower 16 bits used, and its position is between the reserved bytes and payload of the packet.

Based on the characteristics of the video network, one of the core concepts of the embodiment of the invention is provided, and a calling channel between a target video network terminal in a wide area network and a target internet terminal in a local area network is established by taking a legal equipment cooperation server of a fire wall as a bridge.

Example one

Fig. 5 is a flowchart of a method for calling an internet terminal according to an embodiment of the present invention, which is applied to a collaboration server, and as shown in fig. 5, the method includes:

step 501, receiving a call request of a target video network terminal to a target internet terminal sent by a video network server under the condition that a protocol conversion server accesses the video network and the internet at the same time.

The call request is sent to the video network server by the target video network terminal, and the call request follows the video network protocol. The target internet terminal is located in the local area network, and the target video network terminal is located in the wide area network outside the local area network. The protocol server is a legal device that can pass through the firewall of the local area network.

In the embodiment of the present invention, the target internet terminal is in a Local Area Network (LAN), which is also commonly referred to as an intranet or a private Network, the target video Network terminal is in a Wide Area Network (WAN) outside the LAN, which is also commonly referred to as an extranet or a public Network, a firewall may be disposed between the LAN and the WAN, the firewall controls the ingress and egress of the data packet according to a predefined rule, and the firewall is a first line of defense of the LAN and functions to prevent the ingress of an illegal device data packet, so that the target video Network terminal in the WAN cannot pass through the firewall when the target video Network terminal is an illegal device of the firewall, and thus the target internet terminal in the LAN is directly called. However, the protocol conversion server is a legal device which can pass through the firewall of the local area network, so that the target internet of view terminal can firstly send the call request to the protocol conversion server through the internet of view server, so as to forward the call request to the target internet terminal in the local area network through the protocol conversion server.

The protocol conversion server can comprise two network cards, one network card is a video network card which is communicated with the video network equipment and can be accessed into the video network, the other network card is an internet network card which is communicated with the internet equipment and can be accessed into the internet. Therefore, under the condition that the video network card is accessed into the video network and the Internet network card is accessed into the Internet, the protocol conversion server can receive a call request of a target video network terminal to the target Internet terminal, which is sent by the video network server.

Step 502, convert the call request into a first call signaling conforming to a call admission status protocol.

Specifically, the call Admission and Status (RAS) protocol provides the device with functions of determining an endpoint address, an endpoint Status, and performing call Admission control. The RAS protocol is a part of H225.0, the H225.0 protocol is a part of the H460.18 protocol, and the h.460.18 protocol is called h.323 signaling traversal Network Address Translation (NAT) and firewall, which is a standard established by international telecommunications union for signaling traversal through NAT and firewall in the h.323 system.

In the embodiment of the invention, because the call request is in accordance with the internet of view protocol, the protocol conversion server can convert the call request into the first call signaling in accordance with the RAS protocol, so that the first call signaling can be transmitted in the internet.

Step 503, when the destination address in the first call signaling is an address in a state that the target internet terminal is connected to the wide area network, converting the destination address into an address in a state that the target internet terminal is connected to the local area network, and obtaining a second call signaling.

The destination address refers to an IP (Internet Protocol) address.

In the embodiment of the invention, the destination address in the first call signaling received by the coordination server corresponds to the destination address of the wide area network corresponding to the target internet terminal, and the target internet terminal is in the local area network, so that the destination address needs to be converted into the IP address of the local area network corresponding to the target internet terminal to obtain the second call signaling, and the second call signaling can send the target internet terminal in the local area network.

Step 504, the second call signaling is sent to the target internet terminal.

In the embodiment of the present invention, the coordination server may send the call request to the target internet terminal in the local area network according to the IP address in the second call signaling.

And 505, receiving a response signaling replied by the target internet terminal aiming at the second call signaling.

In the embodiment of the present invention, the target internet terminal may receive the second call signaling sent by the coordination server, and may generate the response signaling for the second call signaling, where the response signaling follows the call admission state protocol, and then may send the response signaling to the coordination server, and the coordination server may receive the response signaling. The response signaling may include information such as a role identifier of the target internet terminal in the call, an IP address port number of the target internet terminal, a call number alias, and a protocol version number.

Step 506, the answer signaling is converted into call response signaling following the video networking protocol.

The target video network terminal can only identify the signaling following the video network protocol, so the protocol conversion server can convert the response signaling into the call response signaling following the video network protocol after receiving the response signaling following the internet protocol.

And 507, sending the call response signaling to the video networking server so that the video networking server sends the call response signaling to the target video networking terminal, and when receiving the call response signaling, the target video networking terminal carries out call operation on the target internet terminal through the video networking server and the transfer assisting server in sequence.

In the embodiment of the invention, the protocol conversion server can send the call response signaling to the video network server, the video network server can further send the call response signaling to the target video network terminal, and the target video network terminal can receive the call response signaling, so that the target video network terminal reaches the video network server and then the protocol conversion server, and further the communication channel to the target internet terminal is successfully established. Then, the target video network terminal can perform calling operation on the target internet terminal through the communication channel.

Example two

Fig. 6 is a flowchart of a method for calling an internet terminal according to a second embodiment of the present invention, which is applied to a collaboration server, where the collaboration server includes a client module and a server module, and the client module is connected to the server module, as shown in fig. 6, the method includes:

step 601, configuring a first virtual terminal corresponding to the video network in the client module, and configuring a second virtual terminal corresponding to the internet in the server module.

In the embodiment of the present invention, the protocol conversion server may include two network cards, one of the network cards is a video network card capable of communicating with the video network device, the video network card is connected to the client module, the other one of the network cards is an internet network card capable of communicating with the target internet terminal, and the internet network card is connected to the server module. Configuring a first virtual terminal corresponding to the video network in the client module, namely associating the IP address of the video network card with a corresponding program and binding the IP address of the target video network terminal with the first virtual terminal. And configuring a second virtual terminal corresponding to the Internet in the server module, namely associating the IP address of the Internet network card with the corresponding program and binding the IP address of the target Internet terminal with the second virtual terminal.

Step 602, accessing the video network through the first virtual terminal, and accessing the internet through the second virtual terminal.

The first virtual terminal corresponds to the video network card, so the protocol conversion server accesses the first virtual terminal to the video network. The second virtual terminal corresponds to the internet network card, so the coordination server accesses the second virtual terminal to the internet.

Step 603, receiving a call request of the target video network terminal to the target internet terminal sent by the video network server under the condition that the protocol conversion server simultaneously accesses the video network and the internet.

The method comprises the steps that a call request is sent to a video networking server by a target video networking terminal, wherein the call request follows a video networking protocol; the target internet terminal is positioned in a local area network, and the target video network terminal is positioned in a wide area network outside the local area network; the protocol server is a legal device that can pass through the firewall of the local area network.

In the embodiment of the invention, the video network server is used for replying and forwarding various request signaling sent by the target video network terminal and forwarding audio and video data following a video network protocol. Since the attribute of the first virtual terminal is terminal, the two terminals, the target video network terminal and the first virtual terminal, cannot communicate directly, and the two terminals must communicate by means of the video network server.

In addition, when the protocol conversion server receives a reply signaling of successful network access sent by the video network server, the protocol conversion server indicates that the first virtual terminal successfully accesses the video network. And when the server module in the cooperative server receives the reply signaling of successful network access, the server module indicates that the second virtual terminal is successfully accessed to the Internet.

Taking the target internet terminal as a conference terminal of Te30 model and the target video network terminal as an extremely-light video network terminal as an example, referring to fig. 7, when the protocol server accesses the video network and the internet at the same time, the protocol server receives a call request 8e01 from the extremely-light video network terminal to the conference terminal of Te30 model sent by the video network server.

Specifically, the call request 8e01 is sent by the polar optical terminal of the video network to the video network server, and the call request 8e01 follows the video network protocol. According to the forwarding mechanism of the video networking protocol, the video networking server converts the call request 8e01 into a call request 8e02 and sends the call request 8e02 to the protocol conversion server, and the call request 8e02 follows the video networking protocol; the conference terminal of Te30 model is in LAN, and the extreme light terminal of video network is in WAN outside LAN; the protocol server is a legal device that can pass through the firewall of the local area network.

Wherein, according to the forwarding mechanism of the video network protocol, the video network server converts the call request 8e01 into a call request 8e02, only modifies the name of the call request, and modifies 8e01 into 8e 02. 8e01 and 8e02 are names of call requests in corresponding steps, and have no special meaning, the call requests are divided into a plurality of fields according to call types, specific call numbers corresponding to different fields are different, but all the specific call numbers belong to 8e 01.

Step 604, the call request is converted into a first call signaling conforming to a call admission state protocol by the client module.

In the embodiment of the invention, because the call request is in accordance with the video networking protocol, the protocol conversion server can convert the call request into the signaling in accordance with the RAS protocol, so that the call signaling can be transmitted in the Internet, and further the call signaling can be transmitted to the target Internet terminal.

For example, referring to fig. 7, after receiving the call request 8e02, the client module converts the call request 8e02 into call signaling (calletup) conforming to the RAS protocol.

Step 605, the call signaling is sent to the server module through the client module.

In the embodiment of the invention, the coordination server sends the call signaling to the server module through the client module, so that the further processing and transmission of the call signaling can be realized.

For example, referring to fig. 7, call request 8e02 is converted into calletup compliant with the RAS protocol and the calletup is sent to the server module.

Step 606, when the destination address in the first call signaling is the address of the target internet terminal in the state of connecting with the wide area network, the destination address is converted into the address of the target internet terminal in the state of connecting with the local area network, and a second call signaling is obtained.

For example, referring to fig. 7, when the IP address of calletup is an address in the wan state of the conference terminal connected to model Te30, the protocol server should convert the address into an address in the lan state of the conference terminal connected to model Te30, and obtain the second call signaling.

Step 607, the second call signaling is sent to the target internet terminal through the server module.

For example, referring to fig. 7, in order to establish a call from a server module to a conference terminal model Te30 of the local area network, the server module sends a Service Control Indication (SCI) call signaling compliant with the RAS protocol to the conference terminal model Te30, wherein the SCI includes a generic data (GenericData) field including an incoming call Indication (incomgcalindication). Wherein, SCI is the content in H.460.18 protocol, which is related to NAT traversing firewall.

Step 608, receiving, by the server module, a response signaling replied by the target internet terminal for the second call signaling.

In the embodiment of the present invention, the target internet terminal may receive the second call signaling sent by the coordination server, may generate the response signaling for the second call signaling, may then send the response signaling to the coordination server, and the coordination server may receive the response signaling. The response signaling may include information such as a role identifier of the target internet terminal in the call, an IP address port number of the target internet terminal, a call number alias, and a protocol version number.

For example, referring to fig. 7, a conference terminal model Te30 receives a call signaling of SCI, responds to a Service Control Response (SCR) response signaling conforming to the H225.0 protocol to the server module, and the collaboration server receives the SCR response signaling through the server module. Wherein, the SCR is the content in the h.460.18 protocol, and is related to NAT traversing firewall.

Step 609, the server module sends the response signaling to the client module.

In this embodiment of the present invention, the implementation process of step 609 includes:

step 6091, the device message sent by the target internet terminal is received by the server module.

Alternatively, referring to fig. 7, the conference terminal of Te30 model establishes a Transmission Control Protocol (TCP) connection according to an address specified by a call address (callsignalingaddress) field in the IncoimgCallIndication, and then sends an H225.0 device (Facility) message to the server module. Wherein, the device message carries an indication (CallIdentifier) field, and the indication field is set according to the previously received indication field of IncoimgCallIndication.

Association of the reply signaling with TCP is determined by the server module from the device message, step 6092.

Optionally, the server module receives the Facility message, and the server module determines the association between the SCR response signaling and the TCP connection according to the CallIdentifier field in the Facility message. On the TCP connection of H225.0 just established, the server module sends a calletup message of H225.0 to the conference terminal model Te 30.

Step 6093, sending the response signaling to the client module through the established TCP connection by the server module

For example, referring to fig. 7, a conference terminal of Te30 model replies to the coordination server with a processing (callprocessing) response signaling, a changing (changing) response signaling and a connection (Connect) response signaling, and the coordination server sends the callprocessing response signaling, the changing response signaling and the connection (Connect) response signaling to the client module through the established TCP connection.

Step 610, converting the response signaling into a call response signaling conforming to the video networking protocol through the client module.

Wherein, because the target terminal can only recognize the signaling of the video networking protocol, the answering signaling needs to be converted into the call response signaling following the video networking protocol.

For example, referring to fig. 7, the client module callprocessing answering signaling, changing answering signaling and connection answering signaling of the protocol server are converted into call response signaling 8e01 conforming to the video networking protocol. Wherein, 8e01 in the call response signaling 8e01 is only the name of the call response signaling.

Step 611, the call response signaling is sent to the video networking server through the client module, so that the video networking server sends the call response signaling to the target video networking terminal, and when receiving the call response signaling, the target video networking terminal performs a call operation on the target internet terminal through the video networking server and the transfer assisting server in sequence.

Optionally, the sending the call response signaling to the video networking server through the client module, so that the video networking server sends the call response signaling to the target video networking terminal in this process, includes: the server module of the collaboration server and the target internet terminal perform a negotiation process of a communication control protocol h.245, wherein the communication control protocol h.245 is a control signaling protocol in a h.460.18 communication system, and is mainly used for information exchange between terminals following the h.460.18 protocol.

The negotiation process of the communication control protocol H.245 comprises the following steps: after receiving the signaling containing the h.245 Address field in the message from the server module, the conference terminal of Te30 model establishes an h.245 channel to the server module according to the Address of h.245 in the Address field of h.245.

Further, if the conference terminal of Te30 model does not receive the Address field of h.245 when the h.245 channel is to be established, the conference terminal of Te30 model may actively send a Facility message to the server module, which includes the cause (Start h.245 Reason) field set to Start h.245. And the server module receives the Facility message, responds to the Facility message, and the replied Facility message carries the Address field of H.245.

When a conference terminal of model Te30 establishes an h.245 channel with a server module, the first message sent by the conference terminal of model Te30 on the channel is an indication (genericidation) message, which includes an identification (call identifier) and a connection (AnswerCall) identifier. The server module receives the genericidation message, and the server module uniquely determines which call this TCP connection is associated with according to the CallIdentifier and AnswerCall identifier in genericidation.

For example, the protocol server may send the call response signaling to the video network server, which in turn may send the call response signaling to the target video network terminal, and as shown in fig. 7, the protocol server sends the call response signaling 8e01 following the video network protocol to the video network server through the client module, so that the video network server converts the call response signaling 8e01 into the call response signaling 8e02, and the video network server sends the call response signaling 8e02 to the video network extremely light terminal. Where 8e02 is the name of the call response signaling.

In the embodiment of the present invention, in order to maintain the communication channel to be kept clear, after step 611, the cooperative forwarding server may further perform the following steps: and establishing a communication maintaining mechanism between the collaboration server and the target internet terminal. For the channel between the server module of the collaboration server and the target internet terminal, the Keep-alive (Keep-alive) mechanism is realized by the server module sending a call terminal signaling to the target internet terminal and the target internet terminal replying to the server module with a response server signaling.

For example, referring to fig. 7, for the channel between the server module and the target internet terminal, the communication maintaining mechanism is implemented by the server module sending Registration Request (RRQ) signaling of RAS protocol model Te30, and the target internet terminal replying registration authentication (RCF) signaling of RAS protocol to the server module.

In the embodiment of the invention, a target video network terminal sends a call request to a target internet terminal to a video network server, a coordination server receives the call request sent by the video network server from the target video network terminal to the target internet terminal under the condition of simultaneously accessing the video network and the internet, the coordination server converts the call request into a first call signaling following a call admission state protocol, when a destination address in the first call signaling is an address in a state that the target internet terminal is connected with a wide area network, the coordination server converts the destination address into an address in a state that the target internet terminal is connected with a local area network to obtain a second call signaling, the coordination server sends the second call signaling to the target internet terminal, the target internet terminal replies a response signaling to the coordination server aiming at the second call signaling, and when the coordination server receives the response signaling, and converting the response signaling into a call response signaling following a video networking protocol, sending the call response signaling to a video networking server by the protocol conversion server, and sending the call response signaling to the target video networking terminal by the video networking server. Therefore, the target video network terminal can be established to the video network server and then to the cooperative server, and further to the communication channel of the target internet terminal, so that the target video network terminal can call the target internet terminal through the communication channel, and thus, the target video network terminal in the wide area network can pass through the firewall between the wide area network and the local area network, and the target internet equipment in the local area network can be directly called.

EXAMPLE III

Fig. 8 is a flowchart of a method for calling an internet terminal according to a third embodiment of the present invention, applied to a calling system, and referring to fig. 9, a calling system 80 includes a target internet terminal 801, a video server 802, a collaboration server 803, and a target internet terminal 804, which are connected in sequence. The target internet terminal 804 is in a local area network a and the target video network terminal 801 is in a wide area network B outside the local area network a. The collaboration server 803 is a legitimate device that may pass through the firewall of the lan a. Referring to fig. 9, the method includes:

step 701, a target video network terminal sends a call request to a video network server.

Step 702, the coordination server receives a call request of a target video network terminal to a target internet terminal sent by the video network server under the condition of accessing the video network and the internet simultaneously.

In step 703, the coordination server converts the call request into a first call signaling compliant with a call admission state protocol.

Step 704, when the destination address in the first call signaling is the address of the target internet terminal in the state of connecting to the wide area network, the cooperative conversion server converts the destination address into the address of the target internet terminal in the state of connecting to the local area network, and obtains a second call signaling.

Step 705, the collaboration server sends the second call signaling to the target internet terminal.

Step 706, the target internet terminal replies a response signaling to the coordination server for the second call signaling.

Step 707, the coordination server converts the response signaling into a call response signaling conforming to the video networking protocol when receiving the response signaling.

Step 708, the coordination server sends the call response signaling to the video network server.

Step 709, the video network server sends the call response signaling to the target video network terminal.

And step 710, when receiving the call response signaling, the target internet of view terminal sequentially passes through the internet of view server and the coordination server to perform a call operation on the target internet terminal.

The implementation manner of each step in this embodiment may refer to embodiment one and embodiment two, and details of this embodiment of the present invention are not described herein.

In the embodiment of the invention, the target video network terminal sends a call request to the target internet terminal to the video network server, the protocol server receives the call request sent by the video network server from the target video network terminal to the target internet terminal under the condition of simultaneously accessing the video network and the internet, then the protocol server converts the call request into a first call signaling following a call admission state protocol, when a destination address in the first call signaling is an address of the target internet terminal in a wide area network connection state, the protocol server converts the destination address into an address of the target internet terminal in a local area network connection state to obtain a second call signaling, then the protocol server sends the second call signaling to the target internet terminal, the target internet terminal replies a response signaling to the protocol server for the second call signaling, and then the protocol server receives the response signaling, and the target video network terminal carries out calling operation on the target internet terminal sequentially through the video network server and the coordination server when receiving the calling response signaling. Therefore, the target video network terminal can be established to the video network server and then to the cooperative server, and further to the communication channel of the target internet terminal, so that the target video network terminal can call the target internet terminal through the communication channel, and thus, the target video network terminal in the wide area network can pass through the firewall between the wide area network and the local area network, and the target internet equipment in the local area network can be directly called.

Example four

Fig. 10 is a schematic structural diagram of an apparatus for calling an internet terminal according to a fourth embodiment of the present invention, where the apparatus for calling an internet terminal 90 includes:

a first receiving module 901, configured to receive a call request, sent by a video network server, from a target video network terminal to a target internet terminal when a protocol server accesses the video network and the internet at the same time; the method comprises the steps that a calling request is sent to a video networking server by a target video networking terminal; the target internet terminal is positioned in a local area network, and the target video network terminal is positioned in a wide area network outside the local area network; the protocol conversion server is legal equipment which can pass through a firewall of the local area network;

a first conversion module 902, configured to convert the call request into call signaling compliant with a call admission status protocol;

a second conversion module 903, configured to, when a destination address in the first call signaling is an address in a state where the target internet terminal is connected to the wide area network, convert the destination address into an address in a state where the target internet terminal is connected to the local area network, and obtain a second call signaling;

a first sending module 904, configured to send the second call signaling to the target internet terminal;

a second receiving module 905, configured to receive a response signaling replied by the target internet terminal for the second call signaling;

a third conversion module 906, configured to convert the answer signaling into a call response signaling compliant with the video networking protocol;

the second sending module 907 is configured to send the call response signaling to the video networking server, so that the video networking server sends the call response signaling to the target video networking terminal, and when receiving the call response signaling, the target video networking terminal performs a call operation on the target video networking terminal sequentially through the video networking server and the coordination server.

In the embodiment of the invention, a first receiving module can receive a first call request sent by a target video network terminal to a protocol conversion server through a video network server, the first call request is converted into a call admission state protocol signaling through a first conversion module, then a second conversion module is used for converting a destination address into an address in a state that the target internet terminal is connected with a local area network when the destination address in the first call signaling is the address in the state that the target internet terminal is connected with a wide area network, so as to obtain a second call signaling, the second call signaling is sent to the target internet terminal through the first sending module, the second receiving module is used for replying a corresponding response signaling when the target internet terminal receives the second call signaling, and then the protocol conversion server can convert the response signaling into a call response signaling following the video network protocol through a third conversion module, finally, the call response signaling is sent to the video network server through the second sending module, so that the video network server sends the call response signaling to the target video network terminal, and thus, the target video network terminal can be established to the video network server and then to the coordination server, and further to a communication channel of the target internet terminal, so that the target video network terminal can call the target internet terminal through the communication channel, and thus, the target video network terminal in the wide area network can pass through a firewall between the wide area network and the local area network, and the target internet equipment in the local area network is directly called.

EXAMPLE five

Fig. 11 is a schematic structural diagram of an apparatus for calling an internet terminal according to a fourth embodiment of the present invention, where the apparatus 100 includes:

a first receiving module 1001, configured to receive a call request, sent by a video network server, of a target video network terminal to a target internet terminal when a protocol server accesses the video network and the internet at the same time; the method comprises the steps that a calling request is sent to a video networking server by a target video networking terminal; the target internet terminal is positioned in a local area network, and the target video network terminal is positioned in a wide area network outside the local area network; the protocol conversion server is legal equipment which can pass through a firewall of the local area network;

a first conversion module 1002, configured to convert the call request into call signaling compliant with a call admission status protocol;

a second conversion module 1003, configured to, when a destination address in the first call signaling is an address in a state where the target internet terminal is connected to the wide area network, convert the destination address into an address in a state where the target internet terminal is connected to the local area network, to obtain a second call signaling;

a first sending module 1004 for sending the second call signaling to the target internet terminal;

a second receiving module 1005, configured to receive a response signaling replied by the target internet terminal for the second call signaling;

a third conversion module 1006, configured to convert the answer signaling into a call response signaling compliant with the video networking protocol;

a second sending module 1007, configured to send the call response signaling to the video networking server, so that the video networking server sends the call response signaling to the target video networking terminal, and when the target video networking terminal receives the call response signaling, the target video networking terminal sequentially passes through the video networking server and the coordination server, and performs a call operation on the target internet terminal.

Optionally, referring to fig. 9, the collaboration server 803 includes a client module 8031 and a server module 8032, and the client module 8031 and the server module 8032 are connected, and referring to fig. 11, the apparatus 100 further includes:

a configuration module 1008, configured to configure a first virtual terminal corresponding to the video network in the client module, and configure a second virtual terminal corresponding to the internet in the server module;

an access module 1009 is configured to access the video network through the first virtual terminal, and access the internet through the second virtual terminal.

Optionally, the second receiving module 1005 includes:

a first receiving submodule 10051, configured to receive, by the server module, a response signaling replied by the target internet terminal for the second call signaling;

a first sending submodule 10052, configured to send the response signaling to the client module through the server module;

the second conversion module 1003 includes:

a second converting sub-module 10031, configured to convert the response signaling into a call response signaling compliant with the video networking protocol through the client module.

Optionally, referring to fig. 11, the apparatus 100 further comprises:

an establishing module 1010, configured to establish a communication maintaining mechanism between the collaboration server and the target internet terminal.

The embodiment of the invention also provides a collaboration server, which comprises a processor, a memory and a computer program which is stored on the memory and can run on the processor, wherein the computer program realizes the steps of the method for calling the internet terminal according to the first embodiment, the second embodiment and the third embodiment when being executed by the processor.

For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.

The method, the device and the collaboration server for calling the internet terminal provided by the invention are introduced in detail, a specific example is applied in the text to explain the principle and the implementation of the invention, and the description of the above embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A method for calling an internet terminal, applied to a collaboration server, the method comprising:

sending the second call signaling to the target internet terminal, wherein the second call signaling is a service control indication call signaling;

receiving a response signaling replied by the target internet terminal aiming at the second call signaling, wherein the response signaling is a service control response signaling;

2. The method according to claim 1, wherein the protocol conversion server comprises a client module and a server module, the client module and the server module are connected, and before receiving a call request from a target internet-of-view terminal to the target internet terminal sent by the internet-of-view server in case that the protocol conversion server accesses the internet and the video network simultaneously, the method further comprises:

configuring a first virtual terminal corresponding to the video network in the client module and configuring a second virtual terminal corresponding to the internet in the server module;

and accessing the video network through the first virtual terminal, and accessing the Internet through the second virtual terminal.

3. The method of claim 2, wherein the receiving of the reply signaling of the target internet terminal to the reply of the second call signaling comprises:

receiving, by the server module, a response signaling replied by the target internet terminal for the second call signaling;

sending the response signaling to the client module through the server module;

the converting the answer signaling into the call response signaling following the video networking protocol comprises:

converting, by the client module, the answer signaling into call response signaling compliant with the video networking protocol.

4. The method according to claim 1, wherein the sending the call response signaling to the video networking server, so that the video networking server sends the call response signaling to the target video networking terminal, and when the target video networking terminal receives the call response signaling, the target video networking terminal passes through the video networking server and the coordination server in sequence, and after performing a call operation on the target internet terminal, the method further comprises:

and establishing a communication maintaining mechanism between the collaboration server and the target internet terminal.

5. A method for calling an internet terminal is characterized in that the method is applied to a calling system, and the calling system comprises a target video network terminal, a video network server, a protocol server and a target internet terminal which are connected in sequence; the target internet terminal is positioned in a local area network, and the target video network terminal is positioned in a wide area network outside the local area network; the protocol conversion server is legal equipment which can pass through a firewall of the local area network; the method comprises the following steps:

the coordination server sends the second call signaling to the target internet terminal, wherein the second call signaling is a service control indication call signaling;

the target internet terminal replies a response signaling to the coordination server aiming at the second call signaling, wherein the response signaling is a service control response signaling;

6. An apparatus for calling an internet terminal, the apparatus comprising:

the first receiving module is used for receiving a call request of a target video network terminal to a target internet terminal, which is sent by a video network server, under the condition that the protocol conversion server is simultaneously accessed to the video network and the internet; the call request is sent to the video network server by the target video network terminal; the target internet terminal is positioned in a local area network, and the target video network terminal is positioned in a wide area network outside the local area network; the protocol conversion server is legal equipment which can pass through a firewall of the local area network;

the first sending module is used for sending the second call signaling to the target internet terminal, wherein the second call signaling is a service control indication call signaling;

a second receiving module, configured to receive an answer signaling returned by the target internet terminal for the second call signaling, where the answer signaling is a service control response answer signaling;

7. The apparatus of claim 6, wherein the collaboration server comprises a client module and a server module, the client module and the server module being connected, the apparatus further comprising:

the configuration module is used for configuring a first virtual terminal corresponding to the video network in the client module and configuring a second virtual terminal corresponding to the Internet in the server module;

and the access module is used for accessing the video network through the first virtual terminal and accessing the internet through the second virtual terminal.

8. The apparatus of claim 7, wherein the second receiving module comprises:

the first receiving submodule is used for receiving a response signaling replied by the target internet terminal aiming at the second call signaling through the server module;

the first sending submodule is used for sending the response signaling to the client module through the server module;

the second conversion module includes:

and the second conversion submodule is used for converting the response signaling into call response signaling conforming to the video networking protocol through the client module.

9. The apparatus of claim 6, further comprising:

and the establishing module is used for establishing a communication maintaining mechanism between the cooperative server and the target internet terminal.

10. A collaboration server, comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method of calling an Internet terminal as claimed in any one of claims 1 to 4.