CN110662186B - Media negotiation method, media gateway control apparatus, and computer-readable storage medium - Google Patents

Media negotiation method, media gateway control apparatus, and computer-readable storage medium Download PDF

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CN110662186B
CN110662186B CN201810693405.6A CN201810693405A CN110662186B CN 110662186 B CN110662186 B CN 110662186B CN 201810693405 A CN201810693405 A CN 201810693405A CN 110662186 B CN110662186 B CN 110662186B
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called
network
terminal
coding type
calling
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CN110662186A (en
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朱晓洁
黎瑞云
杨征
林俐
彭莉
王庆扬
张琳峰
杨维忠
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/16—Communication-related supplementary services, e.g. call-transfer or call-hold
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/18—Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals

Abstract

The disclosure provides a media negotiation method, a media gateway control device and a computer readable storage medium, and relates to the technical field of mobile communication. The media negotiation method of the present disclosure includes: media gateway control equipment receives a call request from a calling network; replacing the coding type supported by the calling terminal carried in the call request with the coding type supported by the called network; receiving a call response from the called terminal; and under the condition that the coding type included in the call response does not intersect with the coding type supported by the calling terminal, performing code conversion on the call service. The method can avoid carrying media description information which can not be supported by the network in the message, shorten the length of the signaling message and realize the media negotiation of the cross-network communication of the VoLTE terminal.

Description

Media negotiation method, media gateway control apparatus, and computer-readable storage medium
Technical Field
The present disclosure relates to the field of mobile communications technologies, and in particular, to a media negotiation method, a media gateway control device, and a computer-readable storage medium.
Background
In the communication process, both communication parties need to determine the codec supported by both parties through media negotiation, and then call is established. In the prior art, codec conversion is often performed by a MGCF (Media Gateway Control Function) network element.
Because the high-definition audio/video and other coding and decoding types of a VoLTE (Voice over LTE, based on an IP multimedia subsystem) terminal are different from those of a traditional network terminal, the MGCF simply superposes the VoLTE terminal and the media types supported by the MGCF in the media negotiation process and then sends the media types to the traditional network. Meanwhile, the encoding and decoding types supported by the VoLTE terminal are far more than those of the traditional network terminal, so that the description content of the media information in the signaling message is too long, and the traditional network is difficult to process.
Disclosure of Invention
One object of the present disclosure is to enable media negotiation of VoLTE terminals across network communications.
According to an aspect of the present disclosure, a media negotiation method is provided, including: media gateway control equipment receives a call request from a calling network; replacing the coding type supported by the calling terminal carried in the call request with the coding type supported by the called network where the called terminal is located; receiving a call response from the called network; and under the condition that the coding type included in the call response does not intersect with the coding type supported by the calling terminal, performing code conversion on the call service.
Optionally, the call response includes information of at least one coding type supported by the called network and supported by the called terminal.
Optionally, performing transcoding on the call service comprises: selecting a calling encoding type from encoding types supported by a calling network, and informing a calling terminal of adopting the calling encoding type for communication; selecting a called encoding type from encoding types included in the call response, and informing a called terminal of adopting called encoding type communication; the communication information from the main called terminal is converted into the called code type and sent to the called terminal, and the communication information from the called terminal is converted into the calling code type and sent to the calling terminal.
Optionally, the method further comprises: under the condition that the coding type included in the call response and the coding type supported by the calling terminal have intersection, selecting a communication coding type from the intersection; and informing the calling terminal and the called terminal of the communication coding type so as to adopt the communication coding type for communication.
Optionally, the calling terminal includes a terminal supporting a voice service VoLTE function based on a long term evolution technology; the called network includes a fixed network and a mobile communication network, wherein the fixed network includes an IMS (IP Multimedia Subsystem) and a soft switching network.
Optionally, the method further comprises: the called network matches the coding type supported by the called terminal in the call request with the coding type supported by the called network; and generating a response message according to the coding type information in the call request after the coding type which is not supported by the called terminal is deleted, and sending a call response.
By the method, the coding type in the call request can be replaced in the call forwarding process, so that the coding type in the call request forwarded to the called terminal can be supported by the called network, thereby avoiding the media description information which cannot be supported by the network being carried in the message, shortening the length of the signaling message and realizing the media negotiation of the cross-network communication of the VoLTE terminal.
According to another aspect of the present disclosure, there is provided a media gateway control apparatus including: a call receiving unit configured to receive a call request from a calling network and a call response from a called network; the code type replacing unit is configured to replace the code type supported by the calling terminal carried in the call request with the code type supported by the called network; and the interworking unit is configured to perform code conversion on the call service under the condition that the code type included in the call response does not intersect with the code type supported by the calling terminal.
Optionally, the call response includes information of at least one coding type supported by the called network and supported by the called terminal.
Optionally, the interworking unit is configured to: selecting a calling encoding type from encoding types supported by a calling network, and informing a calling terminal of adopting the calling encoding type for communication; selecting a called encoding type from encoding types included in the call response, and informing a called terminal of adopting called encoding type communication; the communication information from the main called terminal is converted into the called code type and sent to the called terminal, and the communication information from the called terminal is converted into the calling code type and sent to the calling terminal.
Optionally, the interworking unit is further configured to: under the condition that the coding type included in the call response and the coding type supported by the calling terminal have intersection, selecting a communication coding type from the intersection; and informing the calling terminal and the called terminal of the communication coding type so as to adopt the communication coding type for communication.
Optionally, the method further comprises: and the adaptation information storage unit is configured to store the corresponding relation between the network and the supported coding types so that the coding type replacing unit determines the coding type supported by the called network and the interworking unit determines the coding type supported by the calling network.
Optionally, the calling terminal includes a terminal supporting a voice service VoLTE function based on a long term evolution technology; the called network comprises a fixed network and a mobile communication network, wherein the fixed network comprises an IMS and a soft switching network.
According to still another aspect of the present disclosure, there is provided a media gateway control apparatus including: a memory and a processor coupled to the memory, the processor configured to perform a method performed by the media gateway control device of any of the above based on instructions stored in the memory.
The media gateway control equipment can replace the coding type in the call request in the call forwarding process, so that the coding type in the call request forwarded to the called terminal can be supported by the called network, thereby avoiding the media description information which can not be supported by the network being carried in the message, shortening the length of the signaling message and realizing the media negotiation of the cross-network communication of the VoLTE terminal.
According to yet another aspect of the disclosure, a computer-readable storage medium is proposed, on which computer program instructions are stored, which instructions, when executed by a processor, implement the steps of the method performed by a media gateway control device as any of the above.
By executing the instruction, the coding type in the call request can be replaced in the call forwarding process, so that the coding type in the call request forwarded to the called terminal can be supported by the called network, thereby avoiding carrying media description information which cannot be supported by the network in the message, shortening the length of the signaling message, and realizing the media negotiation of the cross-network communication of the VoLTE terminal.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:
fig. 1 is a flowchart of one embodiment of a media negotiation method of the present disclosure.
Fig. 2 is a flowchart of another embodiment of the media negotiation method of the present disclosure.
Fig. 3 is a signaling interaction diagram of another embodiment of the media negotiation method of the present disclosure.
Fig. 4 is a schematic diagram of an embodiment of a media gateway control apparatus according to the present disclosure.
Fig. 5 is a schematic diagram of another embodiment of a media gateway control apparatus according to the present disclosure.
Fig. 6 is a schematic diagram of another embodiment of a media gateway control apparatus according to the present disclosure.
Detailed Description
The technical solution of the present disclosure is further described in detail by the accompanying drawings and examples.
A flow diagram of one embodiment of a media negotiation method of the present disclosure is shown in fig. 1.
In step 101, the media gateway control device receives a call request from an originating network. The calling terminal may be a VoLTE network terminal. In one embodiment, the call request includes the coding type supported by the calling terminal, and the media gateway control device may be an MGCF network element.
In step 102, the coding type supported by the calling terminal carried in the call request is replaced by the coding type supported by the called network where the called terminal is located, and the call request is forwarded to the called terminal. In an embodiment, a codec conversion module may be added to an IWU (Interworking Unit) of an MGCF network element, and the coding type supported by the called network is determined according to the network type of the called network. In one embodiment, the network and the types of coding it supports may be preset and stored according to network characteristics. The called network includes a fixed network and a mobile communication network, wherein the fixed network may include an IMS, a soft switch, and the like.
In step 103, a call response from the called network is received. In one embodiment, the called network may adapt the coding type in the call request received by itself according to the coding type supported by itself, and insert the successfully matched coding type into the call response.
In step 104, in case there is no intersection between the coding type included in the call response and the coding type supported by the calling terminal, transcoding is performed on the call service. In an embodiment, default coding types of various networks may be preset, and when there is no intersection between a coding type included in a call response and a coding type supported by a calling terminal, a calling user and a called user are respectively configured to respectively adopt the default coding types of the networks in which the calling user and the called user are located, and code conversion is implemented in an IWU.
By the method, the coding type in the call request can be replaced in the call forwarding process, the coding type which is not supported by the called network in the call request is deleted, so that the coding type in the call request forwarded to the called network can be supported by the called network, the media description information which cannot be supported by the network is prevented from being carried in the message, the length of the signaling message is shortened, and the media negotiation of the cross-network communication of the VoLTE terminal is realized.
In one embodiment, the coding types supported by the called network may be as shown in the following table:
table 1 coding types supported by the called network
Figure BDA0001713068110000051
By pre-configuring the coding types supported by the called network, the coding type information in the call request can be quickly replaced, and the forwarding efficiency of the call request is ensured.
A flow chart of another embodiment of the media negotiation method of the present disclosure is shown in fig. 2.
In step 201, the media gateway control device receives a call request from a calling network, where the call request includes a coding type supported by a calling terminal.
In step 202, the coding type supported by the calling terminal carried in the call request is replaced by the coding type supported by the called network, and the call request is forwarded to the called network.
In step 203, the called network receives the call request, and adapts the coding type supported by the called terminal to the coding type in the call request.
In step 204, the coding type that is not supported by the called terminal in the call request is deleted, a call response is generated according to the coding types supported by both the called network and the called terminal, and the call response is fed back. In one embodiment, one code type supported by both the called network and the called terminal may be preferred, and only the preferred code type is included in the call response, thereby further shortening the length of the call response.
In step 205, the media gateway control device receives a call response from the called network, and determines whether there is an intersection between the coding type in the call response and the coding type supported by the calling terminal. If the intersection exists, go to step 206; if there is no intersection, go to step 208.
In step 206, an encoding type is selected from the intersection of the encoding type in the call response and the encoding type supported by the calling terminal as the communication encoding type for the communication between the calling terminal and the called terminal. In one embodiment, the communication coding type can be randomly selected, or can be selected according to a preset coding type priority order.
In step 207, the determined communication coding type is notified to the calling terminal and the called terminal, and the calling terminal and the called terminal use the coding type for interaction.
In step 208, a calling encoding type is selected from the encoding types supported by the calling network to which the calling terminal belongs, and the calling terminal is notified to communicate using the calling encoding type. In one embodiment, the coding types supported by the VoLTE network as the calling network may include AMR (Adaptive Multi-Rate) -NB (Narrow Band), AMR-WB (Wide Band), g.711, g.729, g.723, and the like. In one embodiment, the calling code type may be randomly selected from among the code types supported by the calling network; in one embodiment, a preferred caller code type may be set, e.g., AMR-NB is selected as the preferred caller code type. In one embodiment, the media gateway control device needs to consider the codec types supported by itself, and both the selected calling codec type and the selected called codec type need to be supported by the codec capability of itself.
In step 209, a called code type is selected from the code types included in the call response, and the called terminal is notified to communicate using the called code type.
In step 210, the media gateway control device converts the coding types of the calling and called terminals during the communication process, including: converting the coding type of the communication information sent to the called terminal from the calling terminal into a called coding type and sending the called coding type to the called terminal; and converting the coding type of the communication information from the called terminal to the calling terminal into the calling coding type, and sending the calling coding type to the calling terminal.
By the method, the coding type in the call request sent to the called network does not comprise the coding type which is not supported by the called network, and the coding type in the call response does not comprise the coding type which is not supported by the called terminal, so that useless information carried in the call response is reduced, the signaling length is shortened, and the successful communication of the calling terminal and the called terminal is ensured.
A signaling interaction diagram of yet another embodiment of the media negotiation method of the present disclosure is shown in fig. 3.
In 301, the calling terminal issues an Invite request to the IWU via the IMS network. The Invite request contains the encoding type information supported by the calling party, included in the SDP1 information.
At 302, the IWU replies a 100Trying message to the IMS network indicating that the received request is being processed.
In 303, the IWU generates a new Invite request to the called network according to the pre-configured information table of the coding types supported by the called network, and the SDP content of the Invite request is identified by SDP2, wherein the included coding types are the coding types supported by the called network.
In 304, the called network replies a 100Trying message to the IWU indicating that the received request is being processed.
In 305, the called terminal rings and responds 180ring to the IWU.
At 306, the IWU responds 180ring to the calling network.
In 307-310, if 180ring requires 100rel, step 7-10 performs reliable forwarding of the temporary response.
In 311, the called network feeds back a call response, sending a 200OK to the IWU. The call response includes SDP3 information (e.g., g.711) indicating the called code type of the current call, and also indicates the terminal media attribute of the current call.
In 312, the IWU performs adaptation of SDP3 to SDP4 according to the preconfigured information table (if SDP3 is included in the calling network codec list, SDP3 is the same as the encoding type included in SDP4, and the IWU does not need to perform media codec conversion; if the encoding type in SDP3 is not included in the calling network codec list, SDP3 and SDP4 are different, the IWU performs codec conversion), and a 200OK including SDP4 is sent to the calling IMS side.
At 313 and 314, 200OK is confirmed and both parties make a voice call.
By the method, under the condition that the signaling flow of interaction between the calling terminal and the called terminal is not changed, the information modification of the media gateway control equipment ensures that the information does not carry media description information which cannot be supported by the network, the length of the signaling message is shortened, the media negotiation of cross-network communication of the VoLTE terminal is realized, and the method is convenient to popularize and apply.
In one embodiment, taking the example of a VoLTE terminal calling a CDMA network soft switch terminal user, the preconfigured bidirectional adaptation information may be as shown in table 2 below:
TABLE 2 Bi-directional Adaptation information
Figure BDA0001713068110000081
The VoLTE terminal issues an Invite request to the IWU over the IMS network. The Invite request received by the IWU contains SDP (session description Protocol) 1 information of the calling party, which includes multiple media types such as AMR-WB, AMR-NB, g.711, g.729, g.723, etc., and for a video call, the SDP also carries video media coding information h.264, etc. The IWU adapts to SDP2, including EVRC and g.711 coding types, based on the pre-configured information and forwards the call request to the CDMA network softswitch terminal.
The called CDMA network soft exchange terminal sends 200OK response to IWU, which contains response SDP3 information of the coding type of the call, including EVRC coding type, indicating the terminal media property of the call. The IWU determines the SDP4 response to the terminal based on whether the EVRC is included in the calling network code type. Because the EVRC is not included in the VoLTE calling network code list, the SDP4 of the call responds to the preferred code AMR-NB in the selection list, and the IWU completes the codec conversion from EVRC to AMR-NB. And sending the 200OK response to the VoLTE network to complete the coding negotiation of the call.
And the called party responds, and the IWU performs coding and decoding conversion on voice media information according to a media negotiation result so as to complete the conversation between the VoLTE terminal and the CDMA network soft switch terminal.
A schematic diagram of one embodiment of a media gateway control apparatus of the present disclosure is shown in fig. 4. The call receiving unit 41 can receive a call request from the calling terminal. The calling terminal may be a VoLTE network terminal. In one embodiment, the call request includes the type of coding supported by the calling terminal. The coding type replacing unit 42 can replace the coding type supported by the calling terminal carried in the call request with the coding type supported by the called network where the called terminal is located. The interworking unit 43 is capable of performing transcoding for the call service in the case that there is no intersection between the coding type included in the call response and the coding type supported by the calling terminal, where the coding type included in the call response is the coding type that can be supported by both the called network and the called terminal. In one embodiment, the called terminal may screen the coding type in the call request, select one or more self-supported coding types, delete other coding types, and then generate a call response according to the selected coding type.
The media gateway control equipment can replace the coding type in the call request in the call forwarding process, so that the coding type in the call request forwarded to the called terminal can be supported by the called network, thereby avoiding the media description information which can not be supported by the network being carried in the message, shortening the length of the signaling message and realizing the media negotiation of the cross-network communication of the VoLTE terminal.
In one embodiment, the interworking unit 43 may select a calling encoding type from encoding types supported by a calling network to which the calling terminal belongs, and notify the calling terminal to communicate by using the calling encoding type; selecting a called encoding type from encoding types included in the call response, and informing a called terminal of adopting called encoding type communication; the communication information from the main called terminal is converted into the called coding type and sent to the called terminal, and the communication information from the called terminal is converted into the calling coding type and sent to the calling terminal, thereby realizing the intercommunication of the calling terminal and the called terminal.
In one embodiment, in the case that there is an intersection between the coding type included in the call response and the coding type supported by the calling terminal, the interworking unit may select a communication coding type from the intersection and notify the calling terminal and the called terminal of the communication coding type so as to communicate with the communication coding type. By the method, unnecessary code type conversion can be avoided, the load of the media gateway control equipment is reduced, and the information transmission efficiency is improved.
In one embodiment, the media gateway control device may further include an adaptation information storage unit 44 capable of storing a correspondence between networks and supported coding types, so that the coding type replacement unit determines the coding type supported by the called network and the interworking unit determines the coding type supported by the calling network. In one embodiment, the correspondence between the called network and the encoding type stored in the adaptation information storage unit 44 may be as shown in table 1. The device can quickly determine the code type to be replaced in the call request by searching the prestored information, thereby ensuring the forwarding efficiency of the call request.
A schematic structural diagram of an embodiment of the media gateway control apparatus of the present disclosure is shown in fig. 5. The media gateway control device comprises a memory 501 and a processor 502. Wherein: the memory 501 may be a magnetic disk, flash memory, or any other non-volatile storage medium. The memory is used for storing the instructions executed by the media gateway control apparatus in the corresponding embodiments of the media negotiation method above. The processor 502 is coupled to the memory 501 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 502 is configured to execute instructions stored in the memory, so as to avoid that media description information that cannot be supported by the network is carried in the message, shorten the length of the signaling message, and implement media negotiation of cross-network communication of the VoLTE terminal.
In one embodiment, as also shown in fig. 6, the media gateway control apparatus 600 includes a memory 601 and a processor 602. The processor 602 is coupled to the memory 601 by a BUS 603. The media gateway control apparatus 600 may also be connected to an external storage 605 via a storage interface 604 for invoking external data, and may also be connected to a network or another computer system (not shown) via a network interface 606. And will not be described in detail herein.
In this embodiment, the data instruction is stored in the memory, and the processor processes the instruction, so that the media description information that cannot be supported by the network can be prevented from being carried in the message, the length of the signaling message is shortened, and the media negotiation of the cross-network communication of the VoLTE terminal is realized.
In another embodiment, a computer-readable storage medium has stored thereon computer program instructions, which when executed by a processor, implement the steps of the method performed by the media gateway control device in the corresponding embodiment of the media negotiation method. As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. 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 apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, 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 apparatus 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 apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Thus far, the present disclosure has been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
The methods and apparatus of the present disclosure may be implemented in a number of ways. For example, the methods and apparatus of the present disclosure may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above-described order for the steps of the method is for illustration only, and the steps of the method of the present disclosure are not limited to the order specifically described above unless specifically stated otherwise. Further, in some embodiments, the present disclosure may also be embodied as programs recorded in a recording medium, the programs including machine-readable instructions for implementing the methods according to the present disclosure. Thus, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.
Finally, it should be noted that: the above examples are intended only to illustrate the technical solutions of the present disclosure and not to limit them; although the present disclosure has been described in detail with reference to preferred embodiments, those of ordinary skill in the art will understand that: modifications to the specific embodiments of the disclosure or equivalent substitutions for parts of the technical features may still be made; all such modifications are intended to be included within the scope of the claims of this disclosure without departing from the spirit thereof.

Claims (14)

1. A media negotiation method, comprising:
receiving a call request from a calling network;
replacing the coding type supported by the calling terminal carried in the call request with the coding type supported by the called network in which the called terminal is located according to the type of the called network in which the called terminal is located;
receiving a call response from a called network, wherein the call response is generated according to the coding type after deleting the coding type which is not supported by the called terminal in the call request;
and under the condition that the coding type included in the call response does not have intersection with the coding type supported by the calling terminal, performing code conversion on the call service.
2. The method of claim 1, wherein the call response includes information of at least one coding type supported by the called network and supported by the called terminal.
3. The method of claim 1, wherein the performing transcoding on call traffic comprises:
selecting a calling encoding type from encoding types supported by a calling network, and informing a calling terminal to adopt the calling encoding type for communication;
selecting a called encoding type from encoding types included in the call response, and informing a called terminal to adopt the called encoding type for communication;
and converting the communication information from the main called terminal into the called coding type and sending the called coding type to the called terminal, and converting the communication information from the called terminal into the calling coding type and sending the calling coding type to the calling terminal.
4. The method of claim 1, further comprising:
under the condition that an intersection exists between the coding type included in the call response and the coding type supported by the calling terminal, selecting a communication coding type from the intersection;
and informing the calling terminal and the called terminal of the communication coding type so as to adopt the communication coding type for communication.
5. The method of claim 1, wherein,
the calling terminal comprises a terminal supporting a voice service VoLTE function based on a long-term evolution technology;
the called network comprises a fixed network and a mobile communication network, wherein the fixed network comprises an IP Multimedia Subsystem (IMS) and a soft switching network.
6. The method of claim 1, further comprising:
the called network matches the coding type in the call request with the coding type supported by the called terminal;
and generating a call response according to the coding type information in the call request after the coding type which is not supported by the called terminal is deleted, and sending the call response.
7. A media gateway control apparatus comprising:
a call receiving unit configured to receive a call request from a calling network and a call response from a called network;
the code type replacing unit is configured to replace the code type supported by the calling terminal carried in the call request with the code type supported by the called network according to the type of the called network where the called terminal is located;
and the interworking unit is configured to perform code conversion on the call service under the condition that the code type included in the call response does not intersect with the code type supported by the calling terminal, wherein the call response is generated according to the code type of the call request after the code type which is not supported by the called terminal is deleted.
8. The apparatus of claim 7, wherein the call response includes information of at least one coding type supported by the called network and supported by the called terminal.
9. The device of claim 7, wherein the interworking unit is configured to:
selecting a calling encoding type from encoding types supported by a calling network, and informing a calling terminal to adopt the calling encoding type for communication;
selecting a called encoding type from encoding types included in the call response, and informing a called terminal to adopt the called encoding type for communication;
and converting the communication information from the main called terminal into the called coding type and sending the called coding type to the called terminal, and converting the communication information from the called terminal into the calling coding type and sending the calling coding type to the calling terminal.
10. The device of claim 7, wherein the interworking unit is further configured to:
under the condition that an intersection exists between the coding type included in the call response and the coding type supported by the calling terminal, selecting a communication coding type from the intersection;
and informing the calling terminal and the called terminal of the communication coding type so as to adopt the communication coding type for communication.
11. The apparatus of claim 7, further comprising:
the adaptation information storage unit is configured to store the corresponding relation between the network and the supported coding types, so that the coding type replacement unit determines the coding type supported by the called network and the interworking unit determines the coding type supported by the calling network.
12. The apparatus of claim 7, wherein,
the calling terminal comprises a terminal supporting a voice service VoLTE function based on a long-term evolution technology;
the called network comprises a fixed network and a mobile communication network, wherein the fixed network comprises an IP Multimedia Subsystem (IMS) and a soft switching network.
13. A media gateway control apparatus comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the method of any of claims 1-5 based on instructions stored in the memory.
14. A computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the method of any one of claims 1 to 5.
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