CN112333799B - Voice communication method, network system and user terminal - Google Patents

Abstract

The invention provides a voice call method, a network system and a user terminal, wherein the method comprises the following steps: and if the call request of the calling terminal is received from the VoIP network, forwarding the call request of the calling terminal according to the current call preferred type and/or online state of the called terminal. The method, the network system and the user terminal can solve the problem that in the prior art, due to the fact that a part of early-stage marketed 4G terminals cannot use the IMS voice call function in 4G and 5G networks, operators have to reserve precious frequency spectrum resources for 2G and 3G networks and need to invest a large amount of manpower and funds to maintain the operation of the 2G and 3G networks every year, and network resource waste is caused.

Description

A voice call method, network system and user terminal

technical field

The present invention relates to the technical field of communications, in particular to a voice call method, a network system and a user terminal.

Background technique

Voice service is one of the main services of operators, and its realization is mainly carried out through 4G and 5G networks. However, some 4G terminals launched in the early stage do not support the 4G network voice solution VoLTE (Voice over Long-Term Evolution, long-term evolution voice bearer) or the 5G network voice solution VoNR (Voice over New Radio), so they cannot be used in 4G and 5G networks The IMS voice call function needs to fall back to 2G and 3G networks when initiating voice services. In order to meet the voice service requirements of such user terminals, operators have to reserve precious spectrum resources for 2G and 3G networks and invest a lot of manpower and funds every year to maintain the operation of 2G and 3G networks, resulting in a huge waste of network resources.

Contents of the invention

The technical problem to be solved by the present invention is to provide a voice call method, a network system and a user terminal for the above-mentioned deficiencies in the prior art, to solve the problem that some early-market 4G terminals in the prior art cannot connect to 4G and 5G networks. Using the IMS voice call function, operators have to reserve precious spectrum resources for 2G and 3G networks, and need to invest a lot of manpower and funds every year to maintain the operation of 2G and 3G networks, resulting in a waste of network resources.

In the first aspect, the embodiment of the present invention provides a voice call method, which is applied to the network side, and the method includes:

If the call request of the calling terminal is received from the VoIP network, the call request of the calling terminal is forwarded according to the current call preference type and/or online status of the called terminal.

Preferably, the forwarding of the call request of the calling terminal according to the current call preference type and/or online status of the called terminal includes:

Judging whether the current call preference type and/or online status of the called terminal is VoIP;

If so, establish a VoIP voice communication channel between the calling terminal and the called terminal;

If not, then establish a VoIP voice communication channel between the calling terminal and the VoIP server, and establish a corresponding voice communication channel between the called terminal and the voice server to which it belongs, and communicate with the VoIP voice in the voice communication channel Transit is established between channels.

Preferably, the preferred type of the current call is a VoIP call or an IMS call, and the online state includes a VoIP online state and an IMS online state, and before the judging whether the called terminal's current call preferred type and/or online state is VoIP, the The method also includes:

receiving and storing the current call preference type sent by the called terminal;

The online state of the called terminal sent by the VoIP server and/or IMS server is received and stored.

Preferably, if the preferred type of the current call is a VoIP call and the VoIP of the called terminal is online, or the preferred type of the current call is an IMS call, but the IMS of the called terminal is not online and only VoIP is online, then between the calling terminal and A VoIP voice communication channel is established between the called terminals.

Preferably, if the preferred type of the current call is an IMS call and the IMS of the called terminal is online, or the preferred type of the current call is a VoIP call, but the VoIP of the called terminal is not online and only the IMS is online, then the calling terminal and the IMS are online. Establishing a VoIP voice communication channel between the VoIP servers, establishing an IMS voice communication channel between the called terminal and the IMS server to which it belongs, and establishing a transfer between the IMS communication channel and the VoIP voice communication channel.

Preferably, the method also includes:

If the call request of the calling terminal is received from the IMS network, it is further judged whether the called terminal is registered in the IMS;

If yes, an IMS voice communication channel is established between the calling terminal and the called terminal.

Preferably, if the called terminal is not registered in the IMS, the method further includes:

Judging whether the online status of the called terminal is VoIP online;

If so, then establish an IMS voice communication channel between the calling terminal and the IMS server, and establish a VoIP voice communication channel between the called terminal and the VoIP server to which it belongs, and establish a VoIP communication channel between the VoIP communication channel and the IMS voice communication channel. Create a transfer.

In a second aspect, an embodiment of the present invention provides a voice call method, which is applied to a calling terminal, and the method includes:

Perform corresponding network access according to the preferred type of the current call;

If the preferred type of the current call is a VoIP call accessed through the VoIP network, a call request is initiated to the VoIP server;

If the preferred type of the current call is not a VoIP call accessed through the VoIP network, a call request is initiated to the voice server according to the native voice.

In a third aspect, an embodiment of the present invention provides a voice call system, including a call management server, a VoIP server, and an IMS server,

The call management server is used to receive the call request of the calling terminal from the VoIP network, and determine whether the current call preference type and/or online status of the called terminal is VoIP, and if so, forward the call request to the VoIP server, If not, then establish a transfer between the VoIP server and the IMS server, and forward the call request to the IMS server;

The VoIP server is configured to establish a VoIP voice call channel between the calling terminal and the called terminal when receiving the call request forwarded by the call management server;

The IMS server is configured to establish an IMS voice call channel with the called terminal when receiving the call request forwarded by the call management server.

In a fourth aspect, an embodiment of the present invention provides a user terminal, including:

A network access module, configured to perform corresponding network access according to the preferred type of the current call;

The first call module is connected with the network access module, and is used to initiate a call request to the VoIP server if the preferred type of the current call is a VoIP call accessed through the VoIP network;

The second call module is connected with the network access module, and is used for initiating a call request to the voice server according to the native voice if the preferred type of the current call is not a VoIP call accessed through the VoIP network.

The voice communication method, network system and user terminal provided by the embodiment of the present invention construct a unified VoIP voice service entrance by installing VoIP client programs in user terminals of different network standards, and realize the replacement of 2G and 3G network circuit domains with VoIP solutions Voice solutions, so that user terminals that cannot use the IMS voice call function can use the voice function through the unified voice service portal. After 2G and 3G frequency reduction and network withdrawal, user terminals can communicate with user terminals that use IMS voice through VoIP voice. , not only the terminal protocol stack and 4G existing network transformation amount is small, but also the promotion cost is low. At the same time, by installing the VoIP client program on the user terminal that supports the IMS function, VoIP voice is used as a supplementary solution to the IMS voice of the operator, so that the user terminal can support both IMS and VoIP functions at the same time. In addition, after the network side receives the call request of the calling terminal from the VoIP network, it does not need to instruct the user terminal to fall back to the 2G or 3G network, and can directly forward the call request of the calling terminal according to the current call preference type and/or online status of the called terminal. The call request realizes the intercommunication between VoIP and IMS or other voice servers, and solves the problem that some early-market 4G terminals in the prior art cannot use the IMS voice call function in the 4G and 5G networks, causing operators to have to provide services for the 2G and 3G networks. Reserving precious spectrum resources and investing a lot of manpower and funds every year to maintain the operation of 2G and 3G networks has caused a waste of network resources.

Description of drawings

Fig. 1: is the flow chart of a kind of voice communication method of embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of the architecture of a user terminal access network system according to an embodiment of the present invention;

Fig. 3: the call flow chart that both the calling terminal and the called terminal are accessed through the VoIP network according to the embodiment of the present invention;

Fig. 4: is the calling flow diagram of the calling terminal accessing the called terminal accessing through the IMS network through the VoIP network according to the embodiment of the present invention;

Fig. 5: is the call flowchart of the calling terminal accessing the called terminal accessing through the VoIP network through the IMS network according to the embodiment of the present invention;

Fig. 6: is the flow chart of a kind of voice communication method of embodiment 2 of the present invention;

FIG. 7 is a schematic structural diagram of a user terminal according to Embodiment 4 of the present invention.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

Example 1:

This embodiment provides a voice call method, applied to the network side, as shown in Figure 1, the method includes:

Step S102: If the call request of the calling terminal is received from the IP-based voice transmission VoIP (Voice over Internet Protocol) network, forward the call request of the calling terminal according to the current call preference type and/or online status of the called terminal .

It should be noted that, VoIP is a voice communication technology, and voice communication is achieved through the Internet Protocol (IP), that is, communication is performed through the Internet. VoLTE and VoNR voice are collectively referred to as IP Multimedia Subsystem IMS (IP Multimedia Subsystem) voice. IMS is proposed by the 3GPP standard organization to provide a general network architecture for IP-based multimedia services on 4G and 5G networks.

In this embodiment, in order to solve the problem that some 4G terminals on the market in the early stage cannot use the IMS voice call function in the 4G and 5G networks, the VoIP solution is used to replace the voice solution in the circuit domain of the 2G and 3G networks. The client program can realize that user terminals that cannot use IMS voice call function can communicate with user terminals that use IMS voice or other voices through VoIP voice. Not only the modification of the terminal protocol stack and 4G existing network is small, but also the promotion cost is low.

In this embodiment, the VoIP client has the basic function of VoIP voice, and the VoIP client can exist in parallel with the original voice application of the user terminal system without modifying the baseband protocol stack and operating system. User terminals that cannot use the IMS voice call function can realize the VoIP voice function by installing the VoIP client program. Provide VoIP voice calling and answering functions through the VoIP client program.

In this embodiment, the calling terminal determines the call type through the terminal capability, the preferred type of the current call, and the online status, and the terminal capability refers to whether the terminal can support IMS call and VoIP call functions. If the terminal supports two call functions at the same time, the user needs to set the preferred type of the current call, register the network through the preferred type of the current call, and determine the call mode used for this call. If the terminal only supports the VoIP call function, the current call is preferred by default. The type is a VoIP call, and the terminal will pre-store its current preferred call type.

In this embodiment, if the calling terminal defaults that the preferred type of the current call is a VoIP call, the VoIP network access is performed, so that when the calling terminal initiates a call request, the network side receives the call request of the calling terminal from the VoIP network, and The call request of the calling terminal is forwarded according to the current call preference type and/or online status of the called terminal.

Optionally, forwarding the call request of the calling terminal according to the current call preference type and/or online status of the called terminal may include:

Judging whether the current call preference type and/or online status of the called terminal is VoIP;

If so, establish a VoIP voice communication channel between the calling terminal and the called terminal;

If not, a VoIP voice communication channel is established between the calling terminal and the VoIP server, and a corresponding voice communication channel is established between the called terminal and the voice server to which it belongs, and between the voice communication channel and the VoIP voice communication channel Create a transfer between them.

In this embodiment, the preferred type of the current call may be a VoIP call or an IMS call, and the online status may include a VoIP online status and an IMS online status.

Optionally, before judging whether the called terminal's current call preference type and/or online status is VoIP, the method also includes:

Receive and store the current call preference type sent by the called terminal;

Receive and store the online status of the called terminal sent by the VoIP server and/or IMS server.

In this embodiment, in order to realize the intercommunication between VoIP and IMS or other voices, the network side may include a call management server, which is used to provide routing between the VoIP server and the IMS server or other voice servers, so that the calling terminal and the called terminal A voice call can be established through the transfer of the call management server.

In this embodiment, the network side may use the call management server to store the online status of the user terminal and the preferred type of the current call. The online status can be reported by the VoIP or IMS server in real time when the user terminal is registered to the VoIP or IMS network, or can be actively queried by the call management server to the VoIP or IMS server, and the preferred type of the current call is directly reported by the user terminal.

It should be noted that, in the present invention, the connection between the user terminal and the network side can be through WiFi, or through 4G or 5G mobile data. As shown in Figure 2, it shows a schematic diagram of the architecture of the user terminal access network system. The basic functions of the VoIP network side are realized through the VoIP server. The VoIP server provides functions such as session management, user management, and user authentication of VoIP services. The call management server is connected to the IMS core network, so as to realize the intercommunication of VoIP voice and IMS voice. VoIP terminal-side functions are realized through the installed VoIP client program. The call management server is connected with the IMS server and the VoIP server respectively, and its main functions are: (1) query the online status of VoLTE or VoNR users from IMS, or query the online status of VoIP users from VoIP; (2) record the current call preferred type setting of the user terminal voice ; (3) Routing control plane and media plane data between IMS and VoIP to realize intercommunication of IMS voice and VoIP voice.

In this embodiment, in order to realize the intercommunication between VoIP and IMS, the user terminal uses the same phone number in the two services of VoIP and IMS, and the user selects the access domain through the routing of the basic call when the IMS or VoIP is online. Can correctly find called. The same experience can be brought to the user by sharing the number of IMS and VoIP, so that the IMS user can call the VoIP user through the phone number, and vice versa.

In this embodiment, user terminals with different terminal capabilities select different basic call flows under different network structures. The calling terminal chooses to access the network according to the terminal capability and the preferred type of the current call. The called terminal queries the online status of the terminal and the preferred type of the current call from the network side to select the access network of the terminal.

In this embodiment, depending on the way the calling terminal accesses the network, the calling side session process is also different, and the calling session process can be divided into the following two situations:

(1) The calling terminal accesses through the VoLTE network

In this scenario, the message flow of the calling side is the same as that of an existing common IMS network user initiating a call, and will not be repeated here.

(2) The calling terminal accesses through the VoIP network

In this scenario, the message flow on the calling side is the same as the message flow on the calling side when a common VoIP network user initiates a call, and will not be repeated here.

In this embodiment, according to the different ways of accessing the network by the calling terminal and the called terminal, the conversation process on the called side is also different, and the conversation process on the called side can be divided into: (a) the calling terminal The calling terminal accesses through the VoIP network; (b) the calling terminal accesses through the VoIP network, and the called terminal accesses through the VoLTE network; (c) the calling terminal accesses through the VoLTE network, and the called terminal accesses through the VoIP network; (d) Four cases where the calling terminal accesses through the VoLTE network and the called terminal accesses through the VoLTE network.

In this embodiment, a user terminal that cannot use the IMS voice call function or a user terminal that supports the IMS function can initiate a call request to the VoIP server by installing the VoIP client program and setting the preferred type of the current call to VoIP call.

Optionally, if the preferred type of the current call is a VoIP call and the VoIP of the called terminal is online, or the preferred type of the current call is an IMS call, but the IMS of the called terminal is not online and only VoIP is online, then the calling terminal and the called terminal Establish a VoIP voice call channel between them.

In this embodiment, as shown in FIG. 3, if both the calling terminal and the called terminal are accessed through the VoIP network, the call flow in this scenario is as follows:

1. The calling terminal initiates a VoIP call to the VoIP server;

2. The VoIP server forwards the call request to the call management server;

3. The call management server queries the preferred type and online status of the called terminal's current call. If the preferred type of the called terminal's current call is a VoIP call or the preferred voice type is an IMS call but the called terminal's IMS is not online and currently only VoIP is online, the call will be made. The management server forwards the call request to the VoIP server;

4. The VoIP server calls the called terminal through the VoIP voice call, and establishes a VoIP voice call channel between the calling terminal and the called terminal through the VoIP server.

Optionally, if the preferred type of the current call is an IMS call and the IMS of the called terminal is online, or the preferred type of the current call is a VoIP call, but the VoIP of the called terminal is offline and only the IMS is online, then between the calling terminal and the VoIP server Establish a VoIP voice call channel between the called terminal and an IMS voice call channel between the called terminal and the IMS server to which it belongs, and establish a transfer between the IMS call channel and the VoIP voice call channel.

In this embodiment, as shown in FIG. 4, if the calling terminal accesses through the VoIP network and the called terminal accesses through the IMS network, the call flow in this scenario is as follows:

1. The calling terminal initiates a VoIP call to the VoIP server;

2. The VoIP server forwards the call request to the call management server;

3. The call management server queries the preferred type and online status of the called terminal's current call. If the preferred type of the called terminal's current call is an IMS call, or the preferred type of the called current call is a VoIP call but the called VoIP is not online, the call management server Forward the call request to the IMS server;

4. The IMS server calls the called terminal through an IMS voice call, and establishes an IMS voice channel with the called terminal. A VoIP voice channel is established between the VoIP server and the calling terminal, and the route between the IMS server and the VoIP server is routed through the call management server. In this way, a voice call is established between the calling terminal and the called terminal through the transfer of the call management server.

Optionally, the method also includes:

If the call request of the calling terminal is received from the IMS network, it is further judged whether the called terminal is registered in the IMS;

If yes, an IMS voice communication channel is established between the calling terminal and the called terminal.

In this embodiment, the user terminal supporting the IMS function can initiate a call request to the IMS server by installing the VoIP client program and setting the preferred type of the current call to IMS call.

In this embodiment, if the called terminal has registered with IMS, that is, the called terminal accesses through the IMS network, the call is a standard IMS call flow, and there is no need to forward the call request to the call management server. Establish an IMS voice communication channel with the called terminal.

Optionally, if the called terminal is not registered with the IMS, the method may also include:

Judging whether the online status of the called terminal is VoIP online;

If so, establish an IMS voice communication channel between the calling terminal and the IMS server, and establish a VoIP voice communication channel between the called terminal and the VoIP server to which it belongs, and establish a transfer between the VoIP communication channel and the IMS voice communication channel .

In this embodiment, as shown in FIG. 5, if the calling terminal accesses through the IMS network and the called terminal accesses through the VoIP network, the call flow in this scenario is as follows:

1. The calling terminal initiates a VoLTE or VoNR call to the IMS server;

2. The IMS server first routes the call request to the called terminal according to the ordinary IMS call, to inquire whether the called terminal is registered with IMS, and if not, forwards the call request to the call management server.

3. After receiving the call request, the call management server queries the VoIP online status of the called terminal. If the called terminal is currently VoIP online, the call management server forwards the call request to the VoIP server;

4. The VoIP server calls the called terminal through a VoIP call, and establishes a VoIP voice channel with the called terminal. An IMS voice channel is established between the IMS server and the calling terminal, and the route between the IMS server and the VoIP server is routed through the call management server. In this way, a voice call is established between the calling terminal and the called terminal through the transfer of the call management server.

In the voice call method provided by the embodiment of the present invention, a unified VoIP voice service portal is constructed by installing a VoIP client program in user terminals of different network standards, and the VoIP solution is used to replace the voice solution of the 2G and 3G network circuit domain, thereby enabling User terminals that cannot use the IMS voice call function can use the voice function through the unified voice service portal. After 2G and 3G frequency reduction and network withdrawal, user terminals can communicate with user terminals that use IMS voice through VoIP voice. Not only the terminal protocol stack and 4G existing network transformation is small, and the promotion cost is low. At the same time, by installing the VoIP client program on the user terminal that supports the IMS function, VoIP voice is used as a supplementary solution to the IMS voice of the operator, so that the user terminal can support both IMS and VoIP functions at the same time. In addition, after the network side receives the call request of the calling terminal from the VoIP network, it does not need to instruct the user terminal to fall back to the 2G or 3G network, and can directly forward the call request of the calling terminal according to the current call preference type and/or online status of the called terminal. The call request realizes the intercommunication between VoIP and IMS or other voice servers, and solves the problem that some early-market 4G terminals in the prior art cannot use the IMS voice call function in the 4G and 5G networks, causing operators to have to provide services for the 2G and 3G networks. Reserving precious spectrum resources and investing a lot of manpower and funds every year to maintain the operation of 2G and 3G networks has caused a waste of network resources.

Example 2:

As shown in FIG. 6, this embodiment provides a voice call method, which is applied to a calling terminal, and the method includes:

Step S202: performing corresponding network access according to the preferred type of the current call;

Step S204: If the preferred type of the current call is a VoIP call accessed through the VoIP network, initiate a call request to the VoIP server;

Step S206: If the preferred type of the current call is not a VoIP call accessed through the VoIP network, initiate a call request to the voice server to which the native voice belongs.

In this embodiment, if the calling terminal is part of the 4G terminal that was launched earlier, by installing the VoIP client program, it can communicate with the user terminal using IMS voice or other voice through VoIP voice. If the calling terminal supports the IMS function, by installing the VoIP client program and setting the preferred type of the current call as a VoIP call, a call request can be initiated to the VoIP server.

Example 3:

This embodiment provides a network system, which is characterized in that it includes a call management server, a VoIP server and an IMS server,

The call management server is used to receive the call request of the calling terminal from the VoIP network, and judge whether the current call preference type and/or online status of the called terminal is VoIP, and if so, forward the call request to the VoIP server; Establish a transfer between the server and the IMS server, and forward the call request to the IMS server;

The VoIP server is used to establish a VoIP voice call channel between the calling terminal and the called terminal when receiving the call request forwarded by the call management server;

The IMS server is configured to establish an IMS voice call channel with the called terminal when receiving the call request forwarded by the call management server.

Example 4:

As shown in FIG. 7, this embodiment provides a user terminal, including:

A network access module 30, configured to perform corresponding network access according to the preferred type of the current call;

The first call module 31 is connected with the network access module 30, and is used to initiate a call request to the VoIP server if the preferred type of current call is a VoIP call accessed through a VoIP network;

The second call module 32 is connected with the network access module 30, and is used for initiating a call request to the voice server according to the original voice if the preferred type of the current call is not a VoIP call accessed through the VoIP network.

At this time, the user terminal is used as the calling terminal.

When the user terminal serves as the called terminal, the first call module of the user terminal is mainly used for receiving a call request sent by the VoIP server, and establishing a VoIP voice call channel with the VoIP server.

Wherein, the first call module may be a VoIP client program installed in the user terminal.

The voice call method, network system, and user terminal provided in Embodiment 2 to Embodiment 4 build a unified VoIP voice service portal by installing VoIP client programs in user terminals of different network standards, and realize the replacement of 2G and 3G with VoIP solutions. The voice solution in the circuit domain of the network, so that user terminals that cannot use the IMS voice call function can use the voice function through the unified voice service portal. The user terminal intercommunication not only requires a small amount of transformation of the terminal protocol stack and the 4G existing network, but also lowers the cost of promotion. At the same time, by installing the VoIP client program on the user terminal that supports the IMS function, VoIP voice is used as a supplementary solution to the IMS voice of the operator, so that the user terminal can support both IMS and VoIP functions at the same time. In addition, after the network side receives the call request of the calling terminal from the VoIP network, it does not need to instruct the user terminal to fall back to the 2G or 3G network, and can directly forward the call request of the calling terminal according to the current call preference type and/or online status of the called terminal. The call request realizes the intercommunication between VoIP and IMS or other voice servers, and solves the problem that some early-market 4G terminals in the prior art cannot use the IMS voice call function in the 4G and 5G networks, causing operators to have to provide services for the 2G and 3G networks. Reserving precious spectrum resources and investing a lot of manpower and funds every year to maintain the operation of 2G and 3G networks has caused a waste of network resources.

It can be understood that, the above embodiments are only exemplary embodiments adopted for illustrating the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (9)

1. A voice call method, characterized in that it is applied to the network side, and the method comprises: If the call request of the calling terminal is received from the VoIP network, the call request of the calling terminal is forwarded according to the current call preference type and/or online status of the called terminal, specifically including: Judging whether the current call preference type and/or online status of the called terminal is VoIP; If so, establish a VoIP voice communication channel between the calling terminal and the called terminal; If not, then establish a VoIP voice communication channel between the calling terminal and the VoIP server, and establish a corresponding voice communication channel between the called terminal and the voice server to which it belongs, and communicate with the VoIP voice in the voice communication channel Transit is established between channels. 2. The voice call method according to claim 1, wherein the preferred type of the current call is a VoIP call or an IMS call, the online state includes a VoIP online state and an IMS online state, and the judging that the called terminal is currently Before the call preference type and/or online status is VoIP, the method also includes: receiving and storing the current call preference type sent by the called terminal; The online state of the called terminal sent by the VoIP server and/or IMS server is received and stored. 3. The voice call method according to claim 2, wherein if the preferred type of the current call is a VoIP call and the VoIP of the called terminal is online, or the preferred type of the current call is an IMS call, but the called terminal If the IMS is not online and only VoIP is online, a VoIP voice communication channel is established between the calling terminal and the called terminal. 4. The voice call method according to claim 2, wherein if the preferred type of the current call is an IMS call and the IMS of the called terminal is online, or the preferred type of the current call is a VoIP call, but the called terminal If the VoIP is not online and only the IMS is online, a VoIP voice communication channel is established between the calling terminal and the VoIP server, and an IMS voice communication channel is established between the called terminal and the IMS server to which it belongs, and the IMS communication channel and A transfer is established between the VoIP voice communication channels. 5. The voice call method according to claim 1, wherein the method further comprises: If the call request of the calling terminal is received from the IMS network, it is further judged whether the called terminal is registered in the IMS; If yes, an IMS voice communication channel is established between the calling terminal and the called terminal. 6. The voice call method according to claim 5, wherein if the called terminal is not registered in IMS, the method further comprises: Judging whether the online status of the called terminal is VoIP online; If so, then establish an IMS voice communication channel between the calling terminal and the IMS server, and establish a VoIP voice communication channel between the called terminal and the VoIP server to which it belongs, and establish a VoIP communication channel between the VoIP communication channel and the IMS voice communication channel. Create a transfer. 7. A voice call method, characterized in that it is applied to a calling terminal, and the method comprises: Perform corresponding network access according to the preferred type of the current call; If the preferred type of the current call is a VoIP call accessed through the VoIP network, a call request is initiated to the VoIP server according to the VoIP voice call channel established between the calling terminal and the called terminal by the VoIP server; If the preferred type of the current call is not a VoIP call accessed through the VoIP network, the VoIP voice call channel established between the calling terminal and the VoIP server, and the corresponding voice call established between the called terminal and the voice server to which it belongs The communication channel, and the intermediate steering established between the voice communication channel and the VoIP voice communication channel initiates a communication request according to the voice server to which the original voice belongs. 8. A network system, characterized in that it comprises a call management server, a VoIP server and an IMS server, The call management server is used to receive the call request of the calling terminal from the VoIP network, and determine whether the current call preference type and/or online status of the called terminal is VoIP, and if so, forward the call request to the VoIP server, If not, then establish a transfer between the VoIP server and the IMS server, and forward the call request to the IMS server; The VoIP server is configured to establish a VoIP voice call channel between the calling terminal and the called terminal when receiving the call request forwarded by the call management server; The IMS server is configured to establish an IMS voice call channel with the called terminal when receiving the call request forwarded by the call management server. 9. A user terminal, characterized in that it comprises: A network access module, configured to perform corresponding network access according to the preferred type of the current call; The first call module is connected with the network access module, and is used to establish a VoIP voice call between the calling terminal and the called terminal according to the VoIP server if the preferred type of the current call is a VoIP call accessed through the VoIP network The channel initiates a call request to the VoIP server; The second call module is connected to the network access module, and is used for, if the preferred type of the current call is not a VoIP call accessed through the VoIP network, according to the VoIP voice call channel established between the calling terminal and the VoIP server, and, According to the corresponding voice call channel established between the called terminal and the voice server to which it belongs, and the voice call channel established between the voice call channel and the VoIP voice call channel, the call request is initiated according to the voice server to which the native voice belongs.

Images