CN114205463A - Method and apparatus for suppressing conventional media prior to broadband voice call - Google Patents

Abstract

The present disclosure provides a method and a device for suppressing conventional media before broadband voice call, wherein the method for suppressing conventional media before broadband voice call comprises the following steps: a first judgment step of judging whether a first backward message carries a conventional media in a call before a broadband voice call; and a monitoring and suppressing step of performing suppression processing on the normal media carried by the first backward message when it is determined in the first determining step that the first backward message carries the normal media.

Description

Method and apparatus for suppressing conventional media prior to broadband voice call

Technical Field

The present disclosure relates to a method and apparatus for suppressing conventional media before a broadband Voice (Voice over broadband-Band) call in the IMS (IP Multimedia Subsystem) communication field, and more particularly, to a method and apparatus for suppressing conventional media when interworking is performed in a broadband Voice and Long Term Evolution Voice bearer (VoLTE) domain, thereby allowing a VoBB terminal to play a local ring back tone by itself. The VoLTE is Voice over LTE, i.e. 4G Voice service.

Background

The ultimate goal of a call is to have two users converse (conversation). Here we refer to the media resulting from the conversation between users as regular media. Early media (early media) is compared to conventional media. Typically, the user conversation does not start immediately (or may not even end up) after the calling user initiates the call, and the waiting time is typically a few seconds to a few tens of seconds, depending entirely on when the called user answers. Before the called party answers, there may also be a media stream generation between the calling user and the network, which is distinguished from conventional media and is referred to as early media. The most typical early media is ringback tones, and in addition to this form of early media, there are other forms of early media such as ring tones and blank, busy, unreachable, or delayed announcements.

The IMS supports various access and rich multimedia services, and becomes a core network standard architecture in the full IP era. It is not only the mainstream choice for Network modification of the fixed voice domain VoBB and PSTN (Public Switched Telephone Network), but also determined by 3GPP (3rd Generation Partnership Project), GSMA (global system for mobile communications association) as the standard architecture for mobile voice. There are different provisions for VoBB and VoLTE as to whether resource reservation (reservation) is enabled. The VoBB does not enable resource reservation, and when the called terminal answers off the hook, the 200OK response message returns to the SDP answer (SDP answer) to carry the conventional media. On the other hand, VoLTE enables resource reservation, and the called terminal returns SDP answer (SDP answer) in the first 183 response message to carry conventional media. Wherein, the "SDP (Session Description Protocol) is an Internet Engineering Task Force (IETF) standard applied to streaming media. In the VoBB, when the called network plays the recorded announcement of blank number, busy, unreachable, and no-call, the SDP answer is returned by 183 response message to carry the early media. Before answering, the VoBB calling terminal receives 183/180 response message carrying SDP answer, which is regarded as early media, and considers that the backward network has sound resource to play. The VoBB terminal suppresses the local ringback tone at this time. The VoBB and VoLTE domains in the operator network are directly communicated, when a VoBB calling terminal dials a VoLTE called terminal, a first 183 response message is received, wherein an SDP answer carries conventional media. The VoBB calling terminal, without discrimination, is generally regarded as early media, which results in that the ring back tone is not heard by the call.

Disclosure of Invention

Hereinafter, referring to fig. 1, a signaling flow when a VoLTE called terminal is dialed by a prior art VoBB calling terminal will be briefly described. It is shown from the flow that such an irregular VoBB terminal misjudges the reason why the early media results in no ringback tone. Here, fig. 1 is a schematic flow chart of dialing a VoLTE called terminal by a VoBB calling terminal in the prior art. First, the calling terminal sends an Invite message to the IMS network, carrying an SDP offer. Wherein, PEM (P-Early-Media) is carried in the signaling: the supported header field indicates that the calling terminal supports early media of the gateway model. And the IMS network which receives the message sent by the calling terminal returns 183 response message, and carries the SDP answer. Then, the called terminal rings, and the IMS network returns a 180 response message. If the calling terminal is a VoLTE calling terminal, the calling terminal can judge that the calling terminal is the conventional media according to the received SDP answer but no PEM, and the local ring back tone can be played once 180 degrees are received. If the calling terminal is a VoBB calling terminal, the calling terminal judges the calling terminal as an early media after receiving the SDP answer, and the local ring back tone is inhibited from being played in the whole process. Then, the IMS network returns 200 response message, and the called terminal answers off hook. Therefore, it may happen that the VoBB terminal misjudges the early media and does not hear the ring back tone.

Although it is desired to solve the problem that the ring back tone cannot be heard by the call, the operator does not want to replace many VoBB terminals, so it is desired to solve the problem of ring back tone playback through the IMS network. It is common practice to build an AS (application server) that contains a media resource server to play network ringback tones for the calling terminal, replacing the regular media with the early media. Doing so then presents the problem of requiring additional resource servers, increasing cost and increasing structural complexity.

The present invention is proposed to solve the above problems, and provides a method and apparatus for enabling a VoBB terminal to play a local ring back tone by itself by optimizing a call signaling flow only through an AS, and suppressing conventional media before a broadband voice call without an additional media resource server.

The following presents a simplified summary of the disclosure in order to provide a basic understanding of some aspects of the disclosure. However, it should be understood that this summary is not an exhaustive overview of the disclosure. It is not intended to identify key or critical elements of the disclosure or to delineate the scope of the disclosure. Its sole purpose is to present some concepts of the disclosure in a simplified form as a prelude to the more detailed description that is presented later.

According to one aspect of the present disclosure, a method for suppressing conventional media before a broadband voice call is provided, having the following steps: a first judgment step of judging whether a first backward message carries a conventional media in a call before a broadband voice call; and a monitoring and suppressing step of performing suppression processing on the normal media carried by the first backward message when it is determined in the first determining step that the first backward message carries the normal media.

According to one aspect of the present disclosure, there is provided an apparatus for suppressing conventional media before a broadband voice call, between a forward network and a backward network, having the following units: the first judging unit judges whether the first backward message carries the conventional media in the calling before the broadband voice communication; and the monitoring and suppressing unit is used for suppressing the conventional media carried by the first backward message under the condition that the first judging unit judges that the first backward message carries the conventional media.

According to the method and the device for inhibiting the conventional media before the broadband voice call, the local ring back tone can be played by the VoBB terminal without an additional media resource server.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.

The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

fig. 1 is a schematic signaling flow diagram of a VoBB calling terminal dialing a VoLTE called terminal in the prior art.

Fig. 2 is a block diagram of an apparatus for suppressing conventional media prior to a broadband voice call.

Fig. 3 is a flowchart executed by the first media type judgment module as module a.

Fig. 4 is a flow chart of the suppression and monitoring module execution as module B.

Fig. 5 is a flowchart executed by the second media type judgment module as module C.

Fig. 6 is a flow chart of a renegotiation conventional media module execution as a response of module D.

Fig. 7 is a signaling flow diagram executed by the application server in case of a called terminal answering.

Fig. 8 is a signaling flow diagram executed by the application server in the case where the called terminal is not due for a long time.

Fig. 9 is a signaling flow diagram executed by the application server in case of call forwarding without answer (CFNA) of the called terminal.

Fig. 10 is a signaling flow diagram executed by the application server in the case where the called terminal does not answer the call but the forwarded called terminal goes off-hook to answer.

Detailed Description

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.

Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Hereinafter, a method and apparatus for suppressing conventional media before a broadband voice call according to the present disclosure will be described in detail with reference to the accompanying drawings.

Fig. 2 is a block diagram of an apparatus for suppressing conventional media prior to a broadband voice call. The device for inhibiting the conventional media before the broadband voice call is between the forward network and the backward network, so that the function of inhibiting the conventional media is realized.

In fig. 2, the apparatus for suppressing conventional media before broadband voice call may have four modules, module a, module B, module C, and module D. Wherein, the module a is the first media type judgment module 101. The first media type determination module 101 processes an SIP (Session Initiation Protocol) call from an external network, and determines whether a media type carried by an 18x response message SDP answer is a normal media or an early media. The module B is a suppression and monitoring module 102, and the suppression and monitoring module 102 suppresses the normal media, continues to monitor the SIP call, monitors whether a subsequent new media is received, and monitors whether the called party goes off-hook and answers. The module C is a second media type judgment module 103, and after the second media type judgment module 103 suppresses the conventional media, it receives a backward network Update message, judges whether the media type is the conventional media or the early media, if the media is the early media, transmits the media to the forward network, and plays the backward network sound resource; as is conventional media, continues to suppress. Finally, the module D is the module 104 for renegotiating the conventional media after the answer, in the module 104 for renegotiating the conventional media after the answer, after the called party picks up the answer, the VoBB AS renegotiates the conventional media with the backward network and the forward network respectively, so that the calling terminal and the called terminal enter into a conversation. Of course, these four modules do not necessarily have to be provided, and only some of the modules may be provided as long as the device for suppressing the conventional media before the broadband voice call can achieve the function of suppressing the conventional media.

For convenience of illustration, a device for suppressing conventional media before broadband voice call is realized by the VoBB AS. Of course, it may be embodied by other means, components, members, and the like.

The flow charts of the execution of the above modules will be described in detail below with reference to fig. 3 to 6. Fig. 3 is a flowchart executed by the first media type judgment module as module a. Fig. 4 is a flow chart of the suppression and monitoring module execution as module B. Fig. 5 is a flowchart executed by the second media type judgment module as module C. Fig. 6 is a flow chart of a renegotiation conventional media module execution as a response of module D.

First, a flow executed by the first media type judgment module 101 will be described. In the first media type determining module 101, in step S301, after forwarding the Invite message, the AS receives a response message corresponding to the Invite. Next, in step S302, a determination is made as to the received response message. When the first backward message is received as a 180-response, it indicates that the backward message does not contain regular media, and proceeds to step S303. In step S303, the AS passes through the call all the way. When the first backward message is 183, the process proceeds to step S304, and a further determination is made in step S304. When it is determined that 183 carries SDP and P-Early-Media (P-Early-Media content equals to send-receive, receive-only), the backward containing Early Media is characterized. Then, step S303 is entered, and the AS transmits the call throughout. In step S304, when it is determined that 183 carries only SDP but no P-Early-Media (or P-Early-Media content is not equal to send-receive, receive-only), the backward containing regular Media is characterized, and AS needs to suppress the regular Media. The process then proceeds to step S305, and proceeds to block B, i.e., the suppression and monitoring block 102, in step S305. In step S304, when it is determined that 183 does not carry SDP, i.e., there is no SDP and no P-Early-Media, the process proceeds to step S306, the AS passes through it, and returns to step S301, and further determination processing is performed according to the subsequent 18x response, and the previous steps are repeated until 183 or 180 response with SDP is received. In step S303, if the received first backward message is 181 response, step S306 is entered, the AS performs transparent transmission, and then returns to step S301, and performs further judgment processing according to the subsequent 18x message, and repeats the above steps until a 183 or 180 response with SDP is received.

Next, a flow executed by the suppression and monitoring module 102 will be described with reference to fig. 4.

In step S401, the AS forwards the 183 response message after deleting the SDP answer that characterizes the regular media. Specifically, the AS receives the first 183 response, which carries only SDP but no P-Early-Media (or P-Early-Media content is not equal to send-receive, receive-only), and then forwards 183 response to the network after deleting SDP in step S401. Then step S402 is entered, the AS continues the call, processes the subsequent SIP message, and monitors whether a backward Update message or 200OK response message is received. In step S403, it is determined whether the received message is an Update message, and if the received message is an Update message, the module C, that is, the second media type determining module 103, is entered. If not, it is further determined in step S404 whether the received message is a 200OK response message. When it is determined in step S404 that the received message is a 200OK response message, the module D is entered, that is, the normal media module 104 is renegotiated after the response. If not, return to step S402 to continue monitoring for subsequent messages.

Next, a flow performed by the second media type judgment module 103 will be described using fig. 5. In step 501, the AS receives the Update message after suppressing the regular media. Then, step S502 is performed to determine the content carried by the received Update message. When the received Update message carries SDP and P-Early-Media (P-Early-Media content is equal to send-receive, receive-only), the backward direction is characterized as Early Media. Then step S503 is entered, and the AS delivers the message containing the early media to the forward network. Specifically, the AS forwards Early SDP AS SDP answer to the forward network via 183 response, and then forwards the Early SDP again to the forward network AS SDP offer via Update message. Then, after the SDP answer of the forward network is acquired, the SDP answer of the forward network is sent to the backward network through the 200 response, and the SDP offer/answer is completed with the backward network. In step S502, when the received Update message only carries SDP but no P-Early-Media (or P-Early-Media content is not equal to send-receive, receive-only), the backward direction is characterized AS normal Media, and the AS needs to suppress the normal Media. Then, the process proceeds to step S504, and the suppression process is performed because the normal media is included. Then, the process proceeds to step S505, and proceeds to the suppression and monitoring module 102. In addition, the Update message is not forwarded to the forward network, but a 200 response is returned to the backward network, returning a false SDP answer.

Next, a flowchart of the execution of the renegotiation regular media module after the reply is described using fig. 6. First, in step S601, the AS suppresses the regular media and receives a 200OK response message of the subsequent network. Then, the process proceeds to step S602, and in step S602, the AS first sends an empty Reinvite (re-invite) message to the network, and acquires an SDP offer of the network. Next, in step S603, the AS transmits the SDP of the backward network to the forward network AS an SDP answer through a 200OK response message. Then, in step S604, the AS sends the SDP of the backward network again to the forward network AS an SDP offer through a Reinvite message, and acquires an SDP answer of the forward network. Finally, in step S605, after acquiring the SDP answer of the forward network, the AS sends the SDP answer of the forward network to the backward network through the ACK message, thereby implementing end-to-end SDP offer/answer renegotiation.

The above is a detailed flow executed by each module of the apparatus for suppressing conventional media before broadband voice call of the present disclosure, which is described with reference to fig. 3 to 6. According to the description and the flow of the modules, the method and the device for suppressing the conventional media before the broadband voice call are provided, and specifically, the vobbs AS judges whether the conventional media or the early media is carried by the SDP answer in the first 183 response message in the call. If the media is normal media, the suppression processing is carried out, and if the media is early media, the transparent transmission processing is carried out. In addition, after the VoBB AS suppresses the regular media, it receives new early media and delivers the early media to the forward network. Furthermore, after the VoBB AS suppresses the regular media, the called party answers off-hook and then delivers the regular media to the forward network. The call initiated by the terminal with the VoBB registration access and the terminal without the VoBB registration access can be triggered to the VoBB AS disclosed by the disclosure, so that the call signaling flow is optimized, and the calling terminal can be ensured to hear the ring back tone.

In the following, the signaling flows in various cases when, for example, a VoBB calling terminal dials a VoLTE called terminal are described as embodiments of the present disclosure, respectively, using fig. 7 to 10. It is to be noted that, although the description is given by taking an example that the VoBB calling terminal belongs to the forward network portion and the VoLTE called terminal belongs to the backward network, the disclosure is not limited thereto, and the backward network may include both the VoLTE called terminal and the VoBB called terminal. This is because the AS does not determine from which network the source address of the message coming from the backward network originates, it only determines from the message content the type of media offered to the backward network, both possible, but only the processing is different.

Fig. 7 is a signaling flow diagram executed by the application server in case of a called terminal answering. Wherein, fig. 7 shows the signaling flow of processing various messages and suppression of normal media between the forward network and the backward network via the VoBB AS, and renegotiating the normal media after the called terminal answers.

First, the Invite message sent from the forward network is forwarded to the backward network via the AS, and then waits for receiving a response message corresponding to the Invite. In fig. 7, module a in the AS receives message 183 response, which 183 message only carries SDP but no P-Early-Media, which characterizes backward containing regular Media. And the module A sends the result to the module B in the AS according to the judgment result, and the module B forwards 183 response information to the network after deleting the SDP. A PRACK is then sent from the forward network to the backward network via the AS to acknowledge receipt of the 183 response message. An acknowledgement reply is sent 200 from the backward network to the forward network via the AS. After the called terminal rings, 180 response messages are sent to the AS from the backward network, the module A in the AS judges that the 180 response messages are the 180 response messages, the backward direction does not contain conventional media, and then the AS transmits calls to the forward network in a whole course. The 180 message represents that the invite message has been sent to the called side, informing the calling side that the called has rung. Then the calling terminal plays the ring back tone and sends PRACK to the backward network from the forward network via AS aiming at the received 180 response message so AS to confirm the reception of the 180 response message. An acknowledgement reply is sent 200 from the backward network to the forward network via the AS. When the called terminal is off-hook to answer, a 200OK answer message is sent to the network from the back. After receiving the response message of the backward network 200OK, the module D in the AS sends an empty Reinvite message to the network first and then acquires the SDP offer of the backward network. The AS then sends the SDP of the backward network AS an SDP answer to the forward network via a 200OK answer message. And the AS sends the ACK confirmation to the forward network again by using the Reinvite message to send the SDP of the backward network AS the SDP offer to the forward network again so AS to acquire the SDP answer of the forward network. After the AS acquires the SDP answer of the forward network, the SDP answer of the forward network is sent to the backward network through the ACK message, and end-to-end SDP offer/answer renegotiation is realized. In the above, it is explained that the conventional media carried in the SDP, which may make the calling terminal unable to hear the ring back tone, is restricted so that the calling terminal can start to hear the ring back tone before the called terminal answers. At the same time, the regular media can be renegotiated after the called party answers off-hook.

Hereinafter, a signaling flow in the case where the called terminal cannot be called for a long time will be described with reference to fig. 8.

In fig. 8, the first half, that is, until the calling terminal plays the ringback tone and transmits PRACK to the backward network and receives 200 response information transmitted to the backward network to confirm recovery, is the same as in fig. 7, and thus, detailed description thereof is omitted. Only the differences in fig. 8 where the called terminal should not be so called for long will be described. When the called terminal is not due for a long time, an Update message is sent to the network from the back. And the module C receives the Update message and judges the content carried by the Update message. Here, the Update message carries SDP and P-Early-Media (P-Early-Media content equals to receive-only), characterizing the backward as Early Media. Then, the AS forwards Early SDP AS SDP answer to the forward network through 183 response, and after PRACK and 200 confirmation between the forward network and the AS, the Early SDP is again transmitted to the forward network AS SDP offer through Update message, after SDP answer of the forward network is obtained, SDP answer of the forward network is sent to the backward network through 200 response, and SDP offer/answer is completed with the backward network. Therefore, the above-described embodiments do not only limit the conventional media carried in the SDP, which may make the ring back tone inaudible to the calling terminal, so that the calling terminal can start to listen to the ring back tone before the called terminal answers. Meanwhile, the condition that the called terminal cannot be called for a long time can be dealt with.

Hereinafter, a signaling flow in the case where the called terminal performs call forwarding without answer will be described with reference to fig. 9. In fig. 9, the first half, that is, until the calling terminal plays the ringback tone and transmits PRACK to the backward network and receives 200 response information transmitted to the backward network to confirm recovery, is the same as in fig. 7, and thus, detailed description thereof is omitted. Only the differences of the called terminal no-answer call forwarding in fig. 9 will be explained. So-called call forwarding without answer (CFNA) is a technique that allows a user to be unaware of the user's current location at, for example, the system; the user is in a deactivated state; the system fails to page the mobile station; after ringing for a long time, the user does not answer; the user is not currently accessible (e.g., the call forwarding service is deactivated or the do-not-disturb service is activated); and forward its incoming call to another phone number set in advance or to the user's voice mailbox without the user responding to a CW (continuous Wave) notification or the like. When the called terminal is forwarded without answer, it is sent from the backward network to the VoBB AS, which 181 indicates that it is being forwarded. And after module A in the VoBB AS receives the first backward message AS 181 response, the AS transparently transmits the 181 response. The forward network and the subsequent network complete the receiving confirmation of the switching through PRACK and 200. Then after switching, an Update message is sent from the backward network. And a module C in the AS judges the content carried by the received Update message. Here, it is assumed that new SDP and P-Early-Media (content of P-Early-Media is equal to send-receive) are carried, and it is characterized that the backward direction is an Early Media, the AS first responds via 183 to forward Early SDP AS SDP answer to the forward network, receives and confirms via PRACK and 200, then retransmits the Early SDP AS SDP offer to the forward network via Update message, acquires SDP answer of the forward network, then responds via 200 to transmit SDP answer of the forward network to the backward network, and completes SDP offer/answer with the backward network. Then a response message is sent 180 from the backward network, and after the forward network receives the response message, the calling terminal continues to play the local ring back tone. Finally, ringing reception acknowledgement is completed by PRACK and 200. According to the present embodiment, not only is the restriction made on the conventional media carried in the SDP, which may make the ring back tone inaudible to the calling terminal, so that the calling terminal can start to terminate the ring back tone before the called terminal answers. Meanwhile, the situation that the called terminal is not answered and is subjected to call forwarding can be dealt with.

Finally, the signaling flow in the case where the called terminal does not answer the call and the forwarded called terminal goes off-hook to answer will be described with reference to fig. 10. In fig. 10, the first half, that is, until the call forwarding is performed without a response from the called terminal, the transmission of the 181 response message indicating forwarding to the head end network and the reception of the acknowledgement by the PRACK and 200 full 181 are the same as those in fig. 9, and therefore, the detailed description thereof will be omitted. Only the different processing will be described after the called terminal forwards the call without answer in fig. 10, the received information carried by the Update is different. In fig. 10, an Update message is transmitted from the backward network. And a module C in the AS judges the content carried by the received Update message. Here, it is assumed that the new SDP is carried but no P-Early-Media exists, the backward direction is represented AS a normal Media, the AS needs to suppress the normal Media, does not forward the Update message to the forward network, but needs to return a 200 response to the backward network, and returns a false SDP answer. Then a response message is sent 180 from the backward network, and after the forward network receives the response message, the calling terminal continues to play the local ring back tone. The acknowledgement is received via the PRACK and 200 full 180 response message. Then when the called terminal does not answer the call and the forwarded called terminal answers, the 200OK answer message is sent to the network from the back. Module B in the AS, after monitoring that the 200OK response message is received, then enters module D. In the module D, an empty Reinvite message is sent to the network first and then, and an SDP offer of the network is obtained. Then, the AS sends the SDP of the backward network to the forward network AS an SDP answer through a 200OK response message. And the AS sends the SDP of the backward network AS the SDP offer to the forward network again through the Reinvite message to acquire the SDP answer of the forward network. After the AS acquires the SDP answer of the forward network, the SDP answer of the forward network is sent to the backward network through the ACK message, and end-to-end SDP offer/answer renegotiation is realized. The above-described embodiments do not only restrict the conventional media carried in the SDP, which may make the calling terminal unable to hear the ringback tone, so that the calling terminal can start to hear the ringback tone before the called terminal answers. Meanwhile, the method can also be used for the situation that the called terminal does not answer and is subjected to call forwarding, and the called terminal subjected to call forwarding answers.

With the four embodiments described above, handling in various situations existing in a communication call is explained. By the method and the device for restraining the conventional media before the broadband voice call, the VoBB terminal can play the local ring back tone by itself only by optimizing the call signaling flow through the application server without particularly setting the media resource server. Compared with the prior art, the cost can be reduced and the structural complexity can be simplified.

It should be appreciated that reference throughout this specification to "an embodiment" or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present disclosure. Thus, appearances of the phrases "in embodiments of the present disclosure" and similar language throughout this specification do not necessarily all refer to the same embodiment.

One skilled in the art will appreciate that the present disclosure can be implemented as a system, apparatus, method, or computer-readable medium (e.g., non-transitory storage medium) as a computer program product. Accordingly, the present disclosure may be embodied in various forms, such as an entirely hardware embodiment, an entirely software embodiment (including firmware, resident software, micro-program code, etc.) or an embodiment combining software and hardware aspects that may all be referred to hereinafter as a "circuit," module "or" system. Furthermore, the present disclosure may also be embodied in any tangible media as a computer program product having computer usable program code stored thereon.

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of systems, apparatuses, methods and computer program products according to specific embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and any combination of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be executed by a processor of a general purpose computer, special purpose computer, 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, implement the functions or acts specified in the flowchart and/or block diagram block or blocks.

Flowcharts and block diagrams of the architecture, functionality, and operation in which systems, apparatuses, methods and computer program products according to various embodiments of the present disclosure may be implemented are shown in the accompanying drawings. Accordingly, each block in the flowchart or block diagrams may represent a module, segment, or portion of program code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in the drawings may be executed substantially concurrently, or in some cases, in the reverse order from the drawing depending on the functions involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the market technology, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (22)

1. A method for suppressing conventional media before broadband voice call, comprising the following steps:

a first judgment step of judging whether a first backward message carries a conventional media in a call before a broadband voice call;

and a monitoring and suppressing step of performing suppression processing on the normal media carried by the first backward message when it is determined in the first determining step that the first backward message carries the normal media.

2. The method of suppressing conventional media prior to a broadband voice call of claim 1,

in the monitoring and suppressing step, after the suppression processing is performed on the normal media carried by the first backward message, whether a subsequent new media is received is further monitored.

3. The method of claim 2, further comprising:

a second determination step of determining whether a specific message carrying media carries normal media or early media, in a case where the specific message carrying media is monitored in the monitoring and suppressing step.

4. The method of suppressing conventional media prior to a broadband voice call of claim 3,

in the case where it is determined in the second determination step that the specific message carries regular media, the monitoring and suppressing step performs a suppression process on the regular media carried by the specific message.

5. The method of suppressing conventional media prior to a broadband voice call as claimed in any one of claims 1 to 4, further comprising:

and a renegotiation step, in which the backward network carries out renegotiation by using an empty re-invitation message to realize proposal/response between the forward network and the backward network.

6. The method of suppressing conventional media prior to a broadband voice call of claim 5,

the renegotiating step is performed in a case where a called off-hook answer message is monitored in the monitoring and suppressing step.

7. The method of claim 3, further comprising:

and an unvarnished transmission step of performing unvarnished transmission processing on the first backward message when it is determined in the first determination step that the first backward message does not carry conventional media, and performing unvarnished transmission processing when it is determined in the second determination step that the specific message carries early-stage media.

8. The method of suppressing conventional media prior to a broadband voice call according to any one of claims 1 to 7,

the first backward message is an 18x response message, and the specific message is an Update message.

9. The method of suppressing conventional media prior to a broadband voice call of claim 8,

when the first backward message is a 183 response message, when it is determined that the 183 response message carries the SDP but no P-Early-Media, the 183 response message is forwarded to the network after the SDP is deleted.

10. The method of suppressing conventional media prior to a broadband voice call of claim 8,

passing through the first backward message when the first backward message is 180 response information, or when the first backward message is 183 response message but carries SDP and P-Early-Media, or the first backward message is 181 response message.

11. The method of suppressing conventional media prior to a broadband voice call of claim 8,

when the specific message is an Update message and the specific message is an Update message carrying SDP but no P-Early-Media, the Update message is not forwarded to the forward network, and a false SDP answer is returned to the backward network.

12. An apparatus for suppressing conventional media before a broadband voice call, which is between a forward network and a backward network, comprises the following units:

the first judging unit judges whether the first backward message carries the conventional media in the calling before the broadband voice communication;

and the monitoring and suppressing unit is used for suppressing the conventional media carried by the first backward message under the condition that the first judging unit judges that the first backward message carries the conventional media.

13. The apparatus for suppressing conventional media prior to a broadband voice call of claim 12,

after the regular media carried by the first backward message is subjected to suppression processing by the monitoring and suppressing unit, the monitoring and suppressing unit further monitors whether a subsequent new media is received.

14. The apparatus for suppressing conventional media prior to a broadband voice call of claim 13, further comprising:

a second determination unit that determines whether a specific message carrying media carries regular media or early media, in a case where the specific message is monitored by the monitoring and suppressing unit.

15. The apparatus for suppressing conventional media prior to a broadband voice call of claim 14,

in a case where it is determined by the second determination unit that the specific message carries regular media, the monitoring and suppression unit performs suppression processing on the regular media carried by the specific message.

16. The apparatus for suppressing conventional media prior to a broadband voice call as claimed in any one of claims 12 to 15, further comprising:

and the renegotiation unit is used for carrying out renegotiation by the backward network by using the empty re-invitation message to realize proposal/response between the forward network and the backward network.

17. The apparatus for suppressing conventional media prior to a broadband voice call of claim 16,

the renegotiation is performed in case a called off-hook answer message is monitored by the monitoring and suppression unit.

18. The apparatus for suppressing conventional media prior to a broadband voice call of claim 14, further comprising:

and an unvarnished transmission unit that performs unvarnished transmission processing on the first backward message when the first determination unit determines that the first backward message does not carry regular media, and performs unvarnished transmission processing when the second determination unit determines that the specific message carries early media.

19. The apparatus for suppressing conventional media prior to a broadband voice call according to any one of claims 12-18,

the first backward message is an 18x response message, and the specific message is an Update message.

20. The apparatus for suppressing conventional media prior to a broadband voice call of claim 19,

when the first backward message is a 183 response message, when it is determined by the first determination unit that the 183 response message carries the SDP but no P-Early-Media, the 183 response message is forwarded to the network after the SDP is deleted by the monitoring and suppressing unit.

21. The apparatus for suppressing conventional media prior to a broadband voice call of claim 19,

passing through the first backward message when the first backward message is 180 response information, or when the first backward message is 183 response message but carries SDP and P-Early-Media, or the first backward message is 181 response message.

22. The apparatus for suppressing conventional media prior to a broadband voice call of claim 19,

when the specific message is an Update message and the specific message is an Update message carrying SDP but no P-Early-Media, the Update message is not forwarded to the forward network, and a false SDP answer is returned to the backward network.

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