CN101227303B - Method for sending customized ring back tone and color image as well as method for sending early media - Google Patents

Abstract

The present invention proposes a color ring tone and color image sending method and an early media sending method. The color ring and color image sending method includes: the calling terminal initiates a call, and the calling PSS AS obtains the color ring early media message and the color image early media message; The calling PSS AS sends a message to the called PSS AS; the called PSS AS recognizes the CRBT early media response and interacts with the CRBT application server; the called terminal sends a successful response to the called PSS AS, and the calling PSS AS interacts with the CRBT application server and the called terminal sends a ringing response, and after receiving the ringing response, notifies the CRBT application server to play the CRBT, and after receiving the ringing response, notifies the chromatic image application server to play the chromatic image to the called terminal. Therefore, through the present invention, it not only provides the business process when the CRBT service and the chromatic image service are simultaneously provided to the caller and the called party, but also solves the problem that the CRBT media and the chromatic image media are carried in signaling at the same time, so that one call can support both CRBT and CRTV services.

Description

Color ring tone and color image sending method and early media sending method

technical field

The present invention relates to the communication field, and more specifically, relates to an IP Multimedia Subsystem (IMS, IP Multimedia Subsystem), when the calling user has the color image service and the called user has the color ring service, simultaneously supports the color image service A method for sending a color ring tone and a color image related to the color ring service and a method for sending early media.

Background technique

With the development of the network, people have more and more demands on communication, hoping to have a rich and colorful user experience in communication.

In traditional telecommunication networks (such as fixed telephone network (PSTN), mobile phone network (PLMN), and emerging next-generation communication network (NGN), when a calling call is made, the calling party hears a repeated The ringback tone of "beep...beep" is used to judge whether the terminal equipment of the called party is ringing, and the called party can judge the identity of the calling party through the calling party number displayed on the terminal equipment. Number shows business.

With the new network technology, the ringback tone heard by the caller is no longer a simple, stereotyped "beep...beep" sound, but allows the user to hear a variety of sounds, including Pleasant music, interesting messages, etc., companies and government agencies can make the ring back tone into their own advertising, which is called the ring back tone service (or personalized ring back tone service). If the calling terminal supports the video function, the CRBT service can also play a video image to the calling terminal. The above-mentioned service is set by the called user, and the color ring tone is used to play to the calling party. The corresponding ring tone file can be played to the calling user according to the preset conditions of the called user. For example, different CRBT files can be played according to different calling users, and different CRBT files can be played in different time periods.

When the called party terminal receives an incoming call, the simple ringing tone can no longer be played, and the network can play a section of sound or video image to the called party terminal (this sound/image is played by a media file preset by the calling user. generated), which is called the chromatic image service. The chromatic image service is set by the calling user and displayed to the called party user. The chromatic image service can play the corresponding chromatic image file to the called user according to the preset conditions of the user. For example, different chromatic image files can be played according to different called users, and different chromatic image files can be played in different time periods.

In order to meet the needs of multimedia communication, the 3rd Generation Partnership Project (3GPP) introduced the IP Multimedia Subsystem (IP Multimedia Subsystem, hereinafter referred to as IMS) on the basis of the original packet bearer network. IMS can not only provide users with traditional voice services, A rich multimedia experience can also be provided to the user.

Figure 1 describes the basic architecture of the IMS network. As shown in Figure 1, the main network elements of IMS include: call control entity (Call Session Control Function, hereinafter referred to as CSCF) 104, home subscriber server (Home Subscriber Server, hereinafter referred to as HSS) 102 and application server (Application Server, Hereinafter abbreviated as AS) 106.

CSCF 104 is divided into three types: S-CSCF (Serving-Call Session Control Function, Serving CSCF) 104-1, P-CSCF (Proxy-Call Session Control Function, proxy CSCF) 104-2, and I-CSCF (Interrogating CSCF, query CSCF) (not shown in Figure 1). P-CSCF 104-2 can be located in the access network where the user is currently located, as the first contact network element for the user to access the IMS network, and forward the user's SIP (Session Initiation Protocol, initial session protocol) call signaling to the IMS core network (SIP signaling is used as the signaling protocol for call control in the IMS network). I-CSCF can complete the function of hiding information inside the network and support network security. S-CSCF 104-1, as the core call control entity, completes the basic call control functions and provides the interface with the application server.

The application server 106 provides services to users, and there may be multiple application servers in the network, each providing different services. Among them, three kinds of AS are involved: PSS AS (PSTN/ISDN Simulation Service, PSTN/ISDN simulation service), CRBT AS, and CRBT AS. PSS AS provides IMS users with basic services and supplementary services of traditional PSTN/ISDN networks, such as call barring, call forwarding, and call waiting. The CRBT AS provides the user with a CRBT ring-back tone. The chromatic image AS provides the user with a chromatic image representing the characteristics of the calling party.

HSS 102 records the user information and service data of each IMS user, cooperates with CSCF 104 to complete the routing function, and provides authentication and authorization functions. The user subscription data is stored in the HSS and downloaded to the S-CSCF 104-1 when the user registers. The user's service triggering rules and the address information of the AS 106 that provides the service are stored in the user's subscription data. When multiple services of the user are respectively provided by multiple AS 106, there will be multiple AS address information in the user subscription data.

When a user applies for a service, he needs to add the corresponding subscription information in the HSS 102 to which the user belongs. The key point is the initial filter rule (IFC) corresponding to the service in the subscription information. The IFC includes the trigger condition of a certain service and the service server/application The trigger address of the server. Each PUI (Public User Id, which means user ID) can correspond to several IFCs. After receiving the initial call request, the S-CSCF must check the corresponding IFC according to the PUI, and forward the call request to an application server.

Wherein, the media flow and the signaling flow in the IMS network are carried by the packet network. Media streams include not only voice, but also data, images, videos, and other audio media. Call control information and media feature information, also called media feature description or media information for short, are both transmitted through SIP signaling. The participants in the call are allowed to use the media feature information to establish a media channel and transmit communication content, such as normal communication sounds, ringing tones, color ring tones, and color images.

In addition, in SIP signaling, SDP (Session Description Protocol, Session Description Protocol) is used to describe media feature information. The media feature information includes the type of communication media (such as audio, video, and image), media encoding type, transmission protocol, transmission port, sampling rate, and the like. When the calling terminal and the called terminal respectively obtain the media feature information of the other party (this process is completed through the offer/answer process described below), a media channel can be established. When the called terminal goes off-hook, the media (that is, the content of the voice call) can be transferred.

In the IMS network, a typical process of establishing a call between two user terminals is shown in Figure 2, which will be described in detail below, where, for the sake of simplicity, the network elements (P-CSCF, S -CSCF and AS).

Fig. 2 shows the flowchart of establishing a call between two user terminals, as shown in Fig. 2, the specific steps include:

Step 201: User A initiates a call request (Invite message in SIP) to user B, which carries media information supported by user A's terminal (in SIP signaling, this is called an offer, hereinafter abbreviated as offer.

Step 202: User B returns a call process indication (183 response in SIP), which carries the media information of user B's terminal (referred to as answer in SIP, hereinafter abbreviated as answer), so that a complete offer/answer The process is completed, and the media channel between calling user A and calling user B can be established.

The offer/answer mechanism refers to the process of media communication between the calling and called terminals. Among them, the calling party or the called party first provides their own media description information in the signaling, which is called an offer, and when the other end receives the signaling with the offer, it will bring its own media description information in the response signaling , called answer. After the Answer is confirmed by the terminal that initiated the offer, the entire media negotiation process is completed, and a media channel can be established.

Step 203: User A returns a reliable confirmation (PRACK message in SIP) to User B;

Step 204: User B returns a successful response (200 response in SIP);

Step 205: the terminal of user B starts ringing, and returns a ringing response (180 response in the SIP), and when user A's terminal receives the ringing response, user A will hear the ringback tone;

Step 206: User B goes off-hook, then terminal B returns a success response to user A; and

Step 207: User A sends a confirmation message to User B.

So far, a media stream connection is established between the two user terminals according to the negotiated media resources, that is, a normal call process is entered.

For billing and other purposes, according to the RFC3261 protocol, only after step 206 (that is, the called party returns a 200OK response to the INVITE request), the network allows the media stream intercommunication between the two user terminals, that is, enters the normal call process.

Compared with the traditional communication network, the above process has a major defect, that is, the ringback tone heard by user A is sent by user terminal A itself. If the network wants to play some special ringback tones for user A before user B picks up the phone Or prompts (such as "the user is busy, please call again later"), the above process cannot be supported.

For this reason, standard organizations such as 3GPP have proposed the concept of early media (Early Media). The so-called early media refers to the media stream that can be transmitted between two users or between the user and the network before user B picks up the phone. The characteristic ring back tones and prompts as before belong to the early media. In order to support the delivery of early media, RFC 3959 ("The Early Session DispositionType for the Session Initiation Protocol (SIP)") designed the Early Session (EarlySession) mechanism and added a Content-Disposition header (Content-Disposition header), among which the Early Session (early-session) or early media is used to transmit early media information before a normal call, and normal session (session) or normal media is used to transmit normal call media information. Early media information can be transmitted simultaneously with normal media information in one message.

In RFC3959 and RFC3960, the feasibility of carrying a normal media (session) and an early media (early session) in the signaling is proposed, and the following fields are used in the signaling to identify the normal media and the early media:

Content-Type: application/sdp

Content-Disposition: session (represents normal media)

Content-Disposition: early-session (represents early media).

Through such a mechanism, the problem of playing some distinctive ringback tones or prompts to the calling user A before a normal conversation can be solved. In this way, the media information of the characteristic ring back tone or prompt is carried by the early media, and the media information of the normal call is carried by the normal media.

However, if two early media are carried in the signaling, the existing protocol fields cannot distinguish between the two early media, and this process will be described in Figure 4.

Fig. 3 shows the call flowchart of early media and normal media, as shown in Fig. 3, comprises the following steps:

Steps 301-302: Calling A sends a call request to called B, and called B returns a session process instruction. Compared with Figure 2, in Figure 2, the calling and called complete the normal media negotiation process in these two steps. But in Figure 3, 302 has added an early-offer, that is, an early media offer;

Steps 303-304: Calling A sends a reliable confirmation to called B, and called B responds successfully. Compared with Figure 2, these two steps in Figure 2 do not have media, but in Figure 3, 303 adds early- answer, that is, as the answer to the early-offer in step 302,

At this point, the early media negotiation between the calling party and the called party is completed. The early media stream can be played. Such as characteristic ring back tone, reminder, etc.;

Step 305: After the called B picks up the hook, it returns a successful response to the calling A; and

Step 306: The calling party A returns a confirmation message to the called party B.

In this way, user A and user B negotiate the media information of the normal session in steps 301 and 302, and negotiate the media information of the early session in steps 302 and 303. Both negotiations use the existing SIP Offer-Answer )mechanism.

Before the user B goes off-hook (step 305), the early media can be transmitted between the two users; and once the user B goes off-hook, the transmission of the early media stops, and the transmission of the normal media begins.

By using the early session mechanism, the same characteristic ringback tone or prompt as that of the traditional communication network can be realized. Further, the early session mechanism can be used to realize the ring back tone and color video services.

The CRBT service is a special service for the called user. When user A calls user B (the called user), the CRBT AS on the network needs to play the CRBT tone customized by user B to user A before user B goes off-hook. Apparently, the early session mechanism can be used to deliver the ring tone as early media to user A.

The chromatic image service is a special service for the calling user. When user A (calling user) calls user B, before user B picks up the phone, the chromatic image AS on the network can send user B a chromatic image customized by user A. (such as a picture, a video). Obviously, the early session mechanism can be used to deliver this piece of media to user B as early media.

If in a call, the calling user A has the CRBT service, and the called user B has the CRBT service at the same time, then the process shown in FIG. 4 will be formed.

As shown in Figure 4, AS 1 is a CRTV AS, and AS 2 is a CRBT AS. Since network elements such as P-CSCF and S-CSCF forward relevant signaling and do not affect the introduction of service processes, their descriptions are omitted in the figure. Specific steps include:

Step 401: User A initiates a call request, which is forwarded by AS 1 and AS 2 to User B;

Steps 402-404: User B returns the call process indication message (183 response in SIP) to AS 2, and AS 2 adds its own media description information to the message as an offer and sends it to AS 1 (that is, the offer of CRBT early media) . AS 1 forwards this message to caller A;

Step 405: User A returns a reliable confirmation (PRACK message in SIP) to AS 1, which carries the early media answer of user A's early media offer to AS 2;

Step 406: AS 1 adds its own media description information in the reliable confirmation message, that is, AS 1-offer (offer for chromatic early media), and sends it to AS 2. Note: There are two early media in this news (only one early media will exist in other news at most);

Step 407: After AS 2 receives the reliable confirmation message, because there is an answer to its own media, it deletes a piece of early media related to itself in the message, and sends the early media related to AS 1 to the called B;

Steps 408-409: User B receives the offer in the reliable confirmation, generates a chromatic early media answer, puts it in the success response and sends it back to AS 2. AS 2 forwards the success response message to AS 1; and

Step 410: AS 1 deletes the early media answer related to itself in the successful response message, and forwards it to user A.

At this point, the early media negotiation between AS 2 and caller A is completed. The early media negotiation between AS 1 and called party B is also completed. AS 2 plays the CRBT to caller A. AS 1 plays a colored picture to called party B.

However, in the prior art, there is no regulation on how to distinguish two early media information in one message. In this way, in step 406 of the above-mentioned flow, AS 1 and AS 2 cannot distinguish which early media information among the two early media information. The media is used for CRBT service, and the early media information is used for CRBT service.

By extension, the scenario where two early media are used in signaling at the same time can be described as follows: before calling A establishes a call with called B, AS 1 wants to send a piece of media to B, and AS 2 also wants to send a piece of media to A. Therefore, there is an urgent need for a method that can simultaneously support the carrying of at least two early media information in the IP multimedia subsystem, and play different early media to the calling party or the called party at the same time. The concurrent business process of the CRBT service and the CRTV service is an important application scenario of this method.

Contents of the invention

In order to solve the above problems, the present invention proposes a method for sending color ring tones and color images and a method for sending early media, which are used to solve the problem in the prior art that two early media cannot be carried or distinguished in one message.

One aspect of the present invention provides a method for sending CRBT and CRTV, which is used to simultaneously realize CRBT and CRTV services in the IP multimedia subsystem, which is characterized in that it includes the following steps: Step S502, the calling terminal initiates a call After the interaction between the calling PSTN/ISDN analog service application server, the called PSTN/ISDN analog service application server and the corresponding CRBT application server and CRBT application server, the calling PSTN/ISDN analog service application server obtains the CRBT early media information and chromatic image early media information; step S504, the calling PSTN/ISDN analog service application server sends a message to the called PSTN/ISDN analog service application server, wherein the message carries the CRBT early media response information returned from the calling terminal and The CRBT early media provided information returned by the CRBT application server; step S506, the called PSTN/ISDN analog service application server recognizes the CRBT early media response information in the received message, and interacts with the CRBT application server to establish a caller The media channel between the terminal and the CRBT application server; step S508, the called PSTN/ISDN analog service application server sends the chromatic image early media provision message to the called terminal, and after receiving the chromatic image early media provision information, the called terminal sends the message to the called terminal Calling the PSTN/ISDN analog service application server to send a successful response with chromatic image response information, the calling PSTN/ISDN analog service application server receives the chromatic image response information forwarded from the called PSTN/ISDN analog service application server, and The chromatic image application server interacts to establish a media channel between the called terminal and the chromatic image application server; and step S510, the called terminal sends a ringing response, and after the called PSTN/ISDN analog service application server receives the ringing response Notifying the CRBT application server to play the CRBT to the calling terminal, and notifying the CRBT application server to play the CRBT to the called terminal after the calling PSTN/ISDN analog service application server receives the ringing response.

According to one aspect of the present invention, the method for sending color ring tones and color images also includes: after the called terminal picks up the hook, it sends a success response message to the called PSTN/ISDN analog service application server, and the called PSTN/ISDN analog service application server sends the color ring tone The application server sends a call release request, the CRBT application server returns a successful response, and then the CRBT application server stops playing the CRBT. In addition, it also includes: the called PSTN/ISDN analog service application server forwards the successful response information sent by the called terminal to the calling PSTN/ISDN analog service application server, and the calling PSTN/ISDN analog service application server sends the chromatic image application server Call release request, the color image application server returns a successful response, and then the color image application server stops playing the color image.

According to one aspect of the present invention, the message is SIP signaling, wherein the color ring back tone early media response information and the color image early media provision information are realized by defining two media type values in the content-Disposition field in the initial session protocol signaling . The media types include: color image morning media and color ring tone early media.

According to one aspect of the present invention, step S502 is specifically: the calling terminal sends a call request to the called terminal through the calling PSTN/ISDN analog service application server and the called PSTN/ISDN analog service application server; When the calling PSTN/ISDN analog service application server returns a response, the called PSTN/ISDN analog service application server sends a call request message to the CRBT application server and receives a response message sent by the CRBT application server, and the response contains the CRBT media provision information; Call the PSTN/ISDN analog service application server to convert the CRBT media provision information in the response message returned by the CRBT application server into CRBT early media provision information, put it in the response message, and send it to the calling PSTN/ISDN analog service application server. The PSTN/ISDN analog service application server forwards the response message to the calling user, and the calling user returns a reliable confirmation message carrying the CRBT early media response information to the calling PSTN/ISDN analog service application server; and the calling PSTN/ISDN analog service The service application server sends a call request message to the chromatic image application server, and the chromatic image application server returns a response message carrying information provided by the chromatic image media, and the calling PSTN/ISDN analog service application server converts the received chromatic image media information into Color image early media provides information.

In addition, step S506 is specifically: the called PSTN/ISDN analog service application server extracts the CRBT early media response information from the message, converts it into CRBT media response information, and sends it to the CRBT application server, and the CRBT application server sends a successful response message.

Step S508 is specifically: the called PSTN/ISDN analog service application server sends a reliable confirmation message to the called terminal, which carries information provided by chromatic early media, and the called terminal returns a successful response message, which carries chromatic early media response information , the called PSTN/ISDN analog service application server forwards the successful response information to the calling PSTN/ISDN analog service application server; The media response information is sent to the chromatic image application server in a reliable confirmation message, and the chromatic image application server returns a success response message.

Another aspect of the present invention also provides a media transmission method for simultaneously implementing at least two media services in the IP multimedia subsystem, which is characterized in that it includes the following steps: Step S702, the calling terminal initiates a call, and the calling terminal The interaction between the calling PSTN/ISDN analog service application server and the called PSTN/ISDN analog service application server and the corresponding media application server, the calling PSTN/ISDN analog service application server obtains at least two early media information; step S704, the main Calling the PSTN/ISDN analog service application server to send signaling to the called PSTN/ISDN analog service application server, wherein the signaling carries information corresponding to at least two early media information respectively; and step S706, the calling PSTN/ISDN analog service The service application server performs corresponding processing according to at least two early media information in the received signaling, and the called terminal performs corresponding processing according to at least one early media information in the received signaling.

Among them, the media includes color ring tones and color images. The signaling is SIP signaling, wherein at least two early media messages are implemented by defining the media type of the content-Disposition field in the SIP signaling. The media types include: color image morning media and color ring tone early media.

In RFC3959 and RFC3960, in order to distinguish the two early media, this application expands the media type of the Content-Disposition header (Content-Disposition) in the SIP signaling to represent the media of CRTV and CRBT, expressed as follows:

Content-Type: application/sdp

Content-Disposition: x-mcid-session (indicates chromatic early media)

Content-Disposition: x-crbt-session (represents CRBT early media).

Therefore, the present invention solves the problem of simultaneous carrying of CRBT media and CRTV media in signaling, and can simultaneously support CRBT and CRTV services in one call. In addition, through the present invention, the intermediate network element (referring to the network element between the calling PSS AS and the called PSS AS, including S-CSCF, I-CSCF, etc.) only needs to transparently transmit the unrecognized extended media type, without There will be mishandling.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, and are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the attached picture:

FIG. 1 is a basic architecture diagram of an IMS network in the related art;

FIG. 2 is a typical call flow diagram of an IMS network in the prior art;

Fig. 3 is the call flowchart of early media and normal media;

Fig. 4 is the call flowchart of two early media;

Fig. 5 is the flowchart of the color ring tone and color image sending method according to the present invention;

Fig. 6 is a complete flowchart of the color ring back tone service and the color image service according to an embodiment of the present invention; and

Fig. 7 is a flowchart of a media sending method according to the present invention.

Detailed ways

The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

Fig. 5 is the flow chart of the color ring tone and color image sending method according to the present invention, as shown in Fig. 5, the method comprises:

Step S502, the calling terminal initiates a call, and through the interaction between the calling PSTN/ISDN analog service application server and the called PSTN/ISDN analog service application server and the corresponding CRBT application server and chromatic image application server, the calling PSTN/ISDN The simulated service application server obtains the CRBT early media information and the CRBT early media information;

Step S504, the calling PSTN/ISDN analog service application server sends a message to the called PSTN/ISDN analog service application server, wherein the message carries the CRBT early media response information returned from the calling terminal and the chromatic image returned by the chromatic image application server The early media provides information; step S506, the called PSTN/ISDN analog service application server recognizes the CRBT early media response information in the received message, and interacts with the CRBT application server to establish a communication between the calling terminal and the CRBT application server media channel;

Step S508, the called PSTN/ISDN analog service application server sends a message to the called terminal, in which information is provided by color image early media, and after receiving the information provided by color image early media, the called terminal applies the analog service to the called PSTN/ISDN The server sends a successful response carrying the chromatic image response information. After receiving the chromatic image response information forwarded from the called PSTN/ISDN analog service application server, the calling PSTN/ISDN analog service application server interacts with the chromatic image application server to establishing a media channel between the called terminal and the chromatic image application server; and

Step S510, the called terminal sends a ringing response, and after the called PSTN/ISDN analog service application server receives the ringing response, it notifies the CRBT application server to play the CRBT to the calling terminal, and the calling PSTN/ISDN analog service application server After receiving the ringing response, the chromatic image application server is notified to play the chromatic image to the called terminal.

In addition, the method for sending the color ring tone and the color image also includes the following steps:

After the called terminal picks up the phone, it sends a successful response message to the called PSTN/ISDN analog service application server, and the called PSTN/ISDN analog service application server sends a call release request to the CRBT application server, and the CRBT application server returns a successful response, and then the CRBT The application server stops playing the ring tone; and

The called PSTN/ISDN analog service application server forwards the successful response information sent by the called terminal to the calling PSTN/ISDN analog service application server, and the calling PSTN/ISDN analog service application server sends a call release request to the color image application server, and the color image application server The image application server returns a successful response, and then the chromatic image application server stops playing the chromatic image.

Wherein, step S502 is specifically: the calling terminal sends a call request to the called terminal through the calling PSTN/ISDN analog service application server and the called PSTN/ISDN analog service application server; When the service application server returns a response, the called PSTN/ISDN analog service application server sends a call request message to the CRBT application server and receives the call process indication response sent by the CRBT application server, and the response carries the CRBT media provision information; the called PSTN/ISDN The ISDN analog service application server converts the CRBT media provision information in the call process indication response returned by the CRBT application server into CRBT early media provision information, puts it in the call process indication response, and sends it to the calling PSTN/ISDN analog service application server. The calling PSTN/ISDN analog service application server forwards the call process indication response to the calling user, and the calling user returns a reliable confirmation message carrying the CRBT early media response information to the calling PSTN/ISDN analog service application server; and the calling PSTN The /ISDN analog service application server sends a call request message to the chromatic image application server, and the chromatic image application server returns a call process indication response carrying the information provided by the chromatic image media, and the calling PSTN/ISDN analog service application server will receive the chromatic image media Provide information and transform it into chromatic early media to provide information.

Step S506 is specifically: the called PSTN/ISDN analog service application server extracts the CRBT early media response information from the message, converts it into CRBT media response information, and sends it to the CRBT application server, and the CRBT application server sends a successful response message.

In addition, step S508 is specifically: the called PSTN/ISDN analog service application server sends a reliable confirmation message to the called terminal, which carries information provided by chromatic early media, and the called terminal returns a successful response message, which carries chromatic early media response information, the called PSTN/ISDN analog service application server forwards the successful response information to the calling PSTN/ISDN analog service application server; and the calling PSTN/ISDN analog service application server converts the received chromatic image early media response information into The chromatic image media response information is sent to the chromatic image application server in a reliable confirmation message, and the chromatic image application server returns a success response message.

Wherein, the message is SIP signaling, and the CRBT early media response and MMTV early media provision are realized by defining the media type of the content-Disposition field in the SIP signaling. The media types include: color image morning media and color ring tone early media.

Fig. 6 is a complete flowchart of the CRBT service and the CRBT service according to an embodiment of the present invention. As shown in Fig. 6, the calling party subscribes to the multimedia CRBT service, the called party subscribes to the multimedia CRBT service, and both the calling and called UEs support Early Session business process. In FIG. 6 , the P-CSCF on the calling user A side, the P-CSCF on the called user B side, and the core network call control node S-CSCF are omitted. The calling PSS AS 604 is a PSS AS that provides services to the calling user 602. The called PSS AS 608 is a PSS AS that provides services to the called user 612. The existence of the PSS is because users generally have other basic voice services, such as outgoing call restriction or incoming call restriction, in addition to the CRBT and CRTV service.

The communication between the calling PSS AS 604 and the chromatic image AS 606 will pass through the S-CSCF. The communication between the called PSS AS 608 and the CRBT AS 610 also passes through the S-CSCF.

It can be seen that in FIG. 6 , the flow between the CRBT AS and the relevant media server and the flow between the CRBT AS and the relevant media server are omitted. The media server is used as a server for storing ringtones, pictures, and video resources in the network.

As shown in Figure 6, if the CRBT service is integrated in the calling PSS AS or the CRBT service is integrated in the called PSS AS, the service flow between the calling PSS AS and the CRBT AS and the service flow between the called PSS AS and the called PSS AS The service flow between chromatic ASs can be omitted.

In addition, in Figure 6, there may be only two kinds of ASs, the CRBT AS and the CRBT AS, without the PSS AS. In this way, the service flow between the calling PSS AS and the CRBT AS, the service flow between the called PSS AS and the CRBT AS in FIG. 6 can be omitted. Like the business flow between AS. In Fig. 6, the chromatic image AS just acts as the role of the calling PSS AS, and the CRBT AS acts as the role of the called PSS AS.

To sum up, the CRBT AS and CRTV AS can be physically integrated devices, but in terms of logical service flow, the service flow shown in Figure 6 is still executed.

The communication between the calling PSS AS 604 and UE_A 602 will go through the P-CSCF and S-CSCF on the A side, that is, there are two entities between the UE_A 602 and the calling PSS AS 604 in the figure: P-CSCF and S-CSCF, And there are also two entities between UE_B 612 and called PSS AS 608: P-CSCF and S-CSCF. As shown in Figure 6, it specifically includes the following steps:

Steps S601-S603, the calling user 602 initiates a call, UE_A 602 sends a call request to UE_B 612, the request includes a normal media request (offer), and the supported (support) header field of the SIP message includes support for early sessions (early-session ) capability (that is, the ability to support early media), the calling PSS AS 604 sends a message to the called PSS AS 608;

Step S604, the called UE_B 612 returns a 183 call process indication response. The supported header field in the response contains the ability to support early-session; at the same time, the response contains the normal media response B1 Answer;

Step S605, the called PSS AS 608 sends a call request message to the CRBT AS 610;

Step S606, the CRBT AS 610 returns the 183 call process indication message, which carries the CRBT media (CRBT Offer) supported by itself in the message;

Steps S607-S608, the called PSS AS 608 returns a 183 call process indication response to UE_A 602 (forwarded by the calling PSS AS 604), and the response message includes the response media (B1 Answer) returned by UE_B612 and the CRBT returned by the CRBT AS 610 Early media (CRBT Offer), at this time, because two media are not allowed to be carried in the signaling of S607 and S608, so the CRBT media returned by CRBT AS 610 is converted into CRBT early media,

In these two steps, the media carrying the CRBT offer can be early media, or the x-crbt-session CRBT early media defined in this application;

Step S609, UE_A 602 send reliable confirmation message (PRACK message of SIP), confirm to receive 183 responses, carry the early media response of color ring back tone (CRBT Answer) in reliable confirmation,

In this step, the media carrying the CRBT Answer can be early media, or the x-crbt-session CRBT early media defined in this application;

Step S610, the calling PSS AS 604 sends a call request message to the chromatic image AS 606;

Step S611, chromatic image AS 606 returns 183 call process indication message, carries the chromatic image media request (color image Offer) that oneself supports;

Step S612, the calling PSS AS 604 sends a reliable confirmation message to the called PSS AS 608, and the message carries the CRBT early media Answer A2 and CRBT early media Offer returned by UE_A;

So far, due to the SIP protocol standard RFC3959 about early media in the prior art, the following SIP fields are used to represent early media:

Content-Disposition: early-session.

Therefore, in the current SIP protocol, it is impossible to carry two early media in one signaling, but in this application, the SIP signaling is extended so that two early media can be carried in one signaling. This application defines two values for this field as follows:

Content-Disposition: x-mcid-session (indicates chromatic early media)

Content-Disposition: x-crbt-session (represents CRBT early media).

In Figure 6, between the calling PSS AS 604 and the called PSS AS 608, the actual networking needs to pass through the S-CSCF network element or other network elements. The extension of the SIP signaling in this application will not affect these network elements. The processing of SIP, that is, the extension of this patent to SIP, only needs the support of the calling PSS AS 604 and the called PSS AS 608 in Figure 6, and other network elements do not need to provide special support for this extension.

The calling party PSS AS 606 obtains the CRBT early media answer in step S609, and obtains the chromatic image media offer in step 611. The caller PSS AS 604 has added the CRBT early media answer in the S612 step message, and added the S612 step message after converting the chromatic image media offer obtained in the S611 step into the chromatic image early media offer.

Now, two early media are carried in the reliable confirmation message in the step S612, and after it arrives at called PSS AS 608, called PSS AS 608 takes out the ring back ring early media answer from the message, converts the ring back ring media answer, at S613 Step to send to the ring tone AS610. Called PSS AS 608 in step S615 sends the reliable confirmation message (there is only one early media in the message now: color image early media offer) to user B 612 with the reliable confirmation message received in step S612.

Optionally, in step S612, in addition to using x-mcid-session and x-crbt-session to represent color image early media and color ring back tone early media, early-session and x-crbt-session can also be used to represent Color image early media and CRBT early media, of course, x-mcid-session and early-session can also be used to represent color image early media and CRBT early media respectively.

Step S613, the called PSS AS 608 sends a reliable confirmation to the CRBT AS 610, and the message carries the CRBT Answer A2 returned by the UE_A 602;

Step S614, CRBT AS 610 sends a successful response message;

Step S615, the called PSS AS 608 sends a reliable confirmation to UE_B 612, carrying the early media of the color image (color image Offer),

In this step, the chromatic image early media type can be represented by early-session or x-mcid-session;

Step S616, UE_B 612 sends a successful response to the called PSS AS 608, and the message carries the chromatic image Answer B2,

In this step, the chromatic image early media type can be represented by early-session or x-mcid-session;

Step S617, the called PSS AS 608 sends a successful response message to the calling PSS AS610, and the message carries the chromatic image Answer B2,

In this step, the chromatic image early media type can be represented by early-session or x-mcid-session;

Step S618, the calling PSS AS 604 sends a successful response message to UE_A 602;

Step S619, the calling PSS AS 604 sends a reliable confirmation message to the chromatic image AS 606, and the chromatic image Answer returned by the UE_B 612 is carried in the message;

Step S620, color image AS 606 sends a successful response message;

Step S621, the called UE_B 612 sends a 180 ringing message to the called PSS AS608;

Step S622, the called PSS AS 608 sends a 180 ringing message to the calling PSS AS604;

Step S623, the calling PSS AS 604 sends a 180 ringing message to UE_A 602;

Step S624, the called PSS AS 608 sends an Info information notification message to the CRBT AS 610 after receiving the 180 ringing message, and notifies the CRBT AS 610 to play the CRBT tone, and the CRBT AS610 sends a successful response message, indicating that the request for playing the CRBT tone is received, and then , the color ring tone AS610 returns a successful response to the call request message received in step S605, indicating that this call is successfully set up, and then the called PSS AS 608 returns a confirmation message of a successful response;

Step S625, the calling PSS AS 604 sends an Info information notification message to the color image AS 606 after receiving the 180 ringing message, and notifies the color image AS 606 to release the color image, and the color image AS 606 sends a successful response message, indicating that the color image has been received Subsequently, the chromatic image AS 606 returns a successful response to the call request message received in step S610, indicating that this call is successfully established, and then the calling PSS AS 604 returns a confirmation message of a successful response,

Here, it starts to play the color ring to the calling party 602 and to play the color image to the called party 612;

Step S626, user B goes off-hook to answer, and UE_B 612 sends a successful response message;

Steps S627-S628, the called PSS AS 608 sends a call release request (BYE message in the SIP) to the CRBT AS 610 to release the call to the CRBT AS 610. The CRBT AS 610 returns a successful response message;

Steps S629-S630, the called PSS AS 608 sends a successful response message to the calling PSS AS 604, and the calling PSS AS 604 sends a successful response message to UE_A 602;

Steps S631-S632, calling party PSS AS 604 send call release request (BYE message in the SIP) to color image AS 606, release the call to color image AS 606, color image AS 606 returns success response message,

Wherein, the CRBT AS stops playing the CRBT to the calling party 602, and the CRBT AS also stops playing the CRBT to the called party 612. The calling party 602 plays the CRBT and plays the CRBT to the called party 612;

Steps S633-S635, the calling UE_A 602 sends a confirmation message to the called UE_B 612, and the calling party and the called party communicate.

Fig. 7 is a flowchart of a media sending method according to the present invention. As shown in Figure 7, the media sending method for realizing at least two kinds of media services simultaneously in the IP multimedia subsystem comprises the following steps:

Step S702, the calling terminal initiates a call, and through the interaction between the calling PSTN/ISDN analog service application server, the called PSTN/ISDN analog service application server and the corresponding media application server, the calling PSTN/ISDN analog service application server obtains At least two early media messages;

Step S704, the calling PSTN/ISDN analog service application server sends signaling to the called PSTN/ISDN analog service application server, wherein the signaling carries information corresponding to at least two early media information respectively; and

Step S706, the calling PSTN/ISDN analog service application server performs corresponding processing according to at least two early media information in the received signaling, and the called terminal performs corresponding processing according to at least one early media information in the received signaling deal with.

Among them, the media includes color ring tones and color images. The signaling is SIP signaling, wherein at least two early media messages are implemented by defining the media type of the content-Disposition field in the SIP signaling. The media types include: color image morning media and color ring tone early media.

To sum up, the present invention solves the problem of simultaneous carrying of CRBT media and CRTV media in signaling, and supports CRBT and CRTV services simultaneously in one call. At the same time, the intermediate network elements of the present invention (referring to the network elements between the calling PSS AS and the called PSS AS, including S-CSCF, I-CSCF, etc.) only need to transparently transmit the unrecognized expanded media types, and will not Error handling.

Therefore, through the present invention, it not only provides the business process when the CRBT service and the chromatic image service are simultaneously provided to the caller and the called party, but also solves the problem that the CRBT media and the chromatic image media are carried in the signaling at the same time, so that they can be simultaneously Support CRBT and CRTV services.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. a kind of color ring tone and color image sending method, for realizing color ring service and color image service in IP multimedia subsystem simultaneously, it is characterized in that, comprise the following steps: Step S502, the calling terminal initiates a call, the calling PSTN/ISDN analog service application server obtains the CRBT early media provision information from the called PSTN/ISDN analog service application server, and sends the CRBT early media provision information to the calling party The terminal, and the calling PSTN/ISDN analog service application server obtains the information provided by the chromatic image early media from the chromatic image application server; Step S504, the calling PSTN/ISDN analog service application server sends a message to the called PSTN/ISDN analog service application server, wherein the message carries the CRBT early media response information returned from the calling terminal and The color image early media providing information returned by the color image application server, the message is an initial session protocol signaling, and the color image early media response information and the color image early media providing information are passed through the initial session It is realized by defining two media type values in the content-Disposition field in the protocol signaling; Step S506, the called PSTN/ISDN analog service application server recognizes the CRBT early media response information in the received message, and interacts with the CRBT application server to establish a link between the calling terminal and the CRBT media channel between application servers; Step S508, the called PSTN/ISDN analog service application server sends a message to the called terminal, in which there is information provided by the color image early media, and after receiving the information provided by the color image early media, the called terminal sends a message to the called terminal The called PSTN/ISDN analog service application server sends a successful response carrying chromatic image response information, and the calling PSTN/ISDN analog service application server receives the message forwarded from the called PSTN/ISDN analog service application server After the chromatic image response information, interact with the chromatic image application server to establish a media channel between the called terminal and the chromatic image application server; and Step S510, the called terminal sends a ringing response, and after the called PSTN/ISDN analog service application server receives the ringing response, it notifies the CRBT application server to play a CRBT to the calling terminal, and After the calling PSTN/ISDN analog service application server receives the ringing response, it notifies the chromatic image application server to play the chromatic image to the called terminal. 2. The color ring tone and color image sending method according to claim 1, further comprising the following steps: After the called terminal goes off-hook, it sends a success response message to the called PSTN/ISDN analog service application server, and the called PSTN/ISDN analog service application server sends a call release request to the CRBT application server, so The CRBT application server returns a successful response, and then the CRBT application server stops playing the CRBT. 3. The color ring tone and color image sending method according to claim 2, further comprising the following steps: The called PSTN/ISDN analog service application server forwards the success response message sent by the called terminal to the calling PSTN/ISDN analog service application server, and the calling PSTN/ISDN analog service application server sends The chromatic image application server sends the call release request, the chromatic image application server returns a successful response, and then the chromatic image application server stops playing the chromatic image. 4. The method for sending CRBT and CRBT according to claim 3, wherein the media type value comprises: CRBT early media and CRBT early media. 5. The method for sending color ring tones and color images according to any one of claims 1 to 4, characterized in that the step S502 is specifically: The calling terminal sends a call request to the called terminal through the calling PSTN/ISDN analog service application server and the called PSTN/ISDN analog service application server; When the called terminal returns a response to the called PSTN/ISDN analog service application server, the called PSTN/ISDN analog service application server sends a call request message to the CRBT application server and receives a call request message from the CRBT application server. A response message sent by the server, wherein the response message carries the information provided by the CRBT media; The called PSTN/ISDN analog service application server converts the CRBT media provision information in the response message returned by the CRBT application server into the CRBT early media provision information, and puts it in the response message, Send to the calling PSTN/ISDN analog service application server, the calling PSTN/ISDN analog service application server forwards the response message to the calling user, and the calling user simulates the response message to the calling PSTN/ISDN The service application server returns a reliable confirmation message carrying the CRBT early media response information; and The calling PSTN/ISDN analog service application server sends a call request message to the chromatic image application server, and the chromatic image application server returns a response message carrying information provided by chromatic image media, and the calling PSTN/ISDN analog service The application server transforms the received chromatic image media provision information into the chromatic image early media provision information. 6. The method for sending CRBT and CRTV according to any one of claims 1 to 4, characterized in that the step S506 is specifically: The called PSTN/ISDN analog service application server extracts the CRBT early media response information from the message, converts it into CRBT media response information, and sends it to the CRBT application server, and the CRBT application server sends a success response message . 7. The method for sending CRBT and CRTV according to any one of claims 1 to 4, characterized in that the step S508 is specifically: The called PSTN/ISDN analog service application server sends a reliable confirmation message to the called terminal, which carries the information provided by the chromatic early media, and the called terminal returns a successful response message, which carries the chromatic early media information. Media response information, the called PSTN/ISDN analog service application server forwards the successful response information to the calling PSTN/ISDN analog service application server; as well as The calling PSTN/ISDN analog service application server converts the received chromatic image early media response information into chromatic image media response information, puts it in a reliable confirmation message and sends it to the chromatic image application server, and the chromatic image The application server returns the success response message. 8. A media sending method, for realizing at least two kinds of media services simultaneously in the IP multimedia subsystem, it is characterized in that, comprising the following steps: Step S702, the calling terminal initiates a call, and through the interaction between the calling PSTN/ISDN analog service application server, the called PSTN/ISDN analog service application server and the corresponding media application server, the calling PSTN/ISDN analog service application The server obtains at least two early media information; Step S704, the calling PSTN/ISDN analog service application server sends a signaling to the called PSTN/ISDN analog service application server, wherein the signaling carries information respectively corresponding to the at least two early media information information, the signaling is initial session protocol signaling, and the at least two early media messages are implemented by defining the media type of the content-Disposition field in the initial session protocol signaling; and Step S706, the called PSTN/ISDN analog service application server converts the received CRBT early media response information in the signaling into CRBT media response information, and sends the CRBT media response information to the CRBT application server; The called PSTN/ISDN analog service application server sends the chromatic image early media provision information carried in the signaling to the called terminal, and obtains the information sent by the called terminal in response to the chromatic image early media provision information. Color image early media response information, and send the color image early media response information to the calling PSTN/ISDN analog service application server, and the calling PSTN/ISDN analog service application server will receive the color image The early media response information is converted into chromatic image media response information, and the chromatic image media response information is sent to the chromatic image application server. 9. The media transmission method according to claim 8, wherein the early media includes color ring tones and color images. 10. The method for sending media according to claim 9, wherein the media types include: CRTV early media and CRBT early media.

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