CN101467420B - Method for providing early-media service based on session initiation protocol - Google Patents
Method for providing early-media service based on session initiation protocol Download PDFInfo
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- CN101467420B CN101467420B CN200780021441.8A CN200780021441A CN101467420B CN 101467420 B CN101467420 B CN 101467420B CN 200780021441 A CN200780021441 A CN 200780021441A CN 101467420 B CN101467420 B CN 101467420B
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Abstract
The present invention relates to a method of providing an early media service based on a session initiation protocol (SIP), wherein early media of a multimedia form can be provided under SIP-based B2BUA mode operation. According to the present invention, in a case where early media are provided to an originating terminal when a call connection with a terminating terminal is established at the request of the originating terminal, the early media is provided in the form of multimedia data, such as text, image, moving image, flash animation and the like, as well as audio data, and thus users desires are fulfilled and users satisfactions are maximized. In addition, with individual operation management of the terminating terminal and the originating terminal according to B2BUA mode operation based on the session initiation protocol and an early session initiation with the originating terminal, an early media service can be normally provided to the originating terminal even when the terminating terminal is in an abnormal operation state.
Description
Technical field
The present invention relates to provide the method for the Early media service of dialogue-based initiation protocol (SIP:session initiation protocol), more particularly, a kind of method that provides based on the Early media service of SIP is provided, and wherein application server and media server can utilize early-session or conventional session that the Early media of the multimedia form of such as image, moving image etc. and audio frequency is provided.
Background technology
Along with the rapid growth of mobile communication subscriber quantity, provide the service provider of Mobile Communication Service to adopt various value-added services to attract client also for the user improves service quality, one of described value-added service is Early media service, for example back tone service.
The Early media service is so a kind of service, namely, when transmitter side is called out to receiver side (, when subscriber's number of calling terminal (originating terminal) trial and receiver side carries out call connection), this service connects until the period that connects and begin to communicate by letter provides the media that replace dialing tone to calling terminal from call try.
This Early media service can be served as for presentation video or be emphasized to receive or send the means of subscriber's characteristic.Therefore, recently tend to substitute the ring-back tone of the bell sound of unification that tradition provides to service-user and machinery, introduce in a different manner the service that making subscriber (particularly terminal subscriber) can change according to its hobby ring-back tone.This service is configured to when transmit leg is attempted communication, substitutes traditional ring-back tone and exports the ring-back tone of being selected by the subscriber.
Yet although alternative traditional unified ring-back tone provides the various ring-back tones based on subscriber's selection, the media that provide as ring-back tone are limited to voice data (for example, voice or music).Therefore, aspect the user's who satisfies the mobile communication terminal that to realize high-quality Voice ﹠ Video owing to the development of recent mobile communication terminal technology higher expectation, there is restriction.
In addition, above-mentioned traditional Early media service is the method for utilizing circuit network, the problem of this circuit network is: monopolize the character of using circuit because circuit network had before call release connects always, cause when the indexing transfer data circuit also will be monopolized use, so circuit resource is by significant wastage.
In addition, the problem of traditional method of servicing is, after early stage service is provided, when session is switched to another session with between the pairing terminal back and forth during the sending and receiving media, in the process of the terminal capability of consulting respective session and processing session switching, the burden of corresponding mobile communication terminal is very heavy.
Therefore, providing Early media when service, the more high expected various media that should be provided for satisfying the user with and the technology of institute's foundation.
Summary of the invention
The technical problem that solves
The present invention is contemplated that and addresses the above problem.A kind of method that provides based on the service of the Early media of SIP is provided, and the Early media that wherein will provide is not limited only to the voice data such as voice etc., and various forms of media (for example, moving image, animation etc.) can be provided.
In addition, another object of the present invention is to provide a kind of provides based on back-to-back user agent (B2BUA: the back-to-back user agent) method of the Early media of operator scheme service, wherein use Internet Protocol (IP) packet network based on SIP to replace circuit network, thus the efficient of maximization circuit resource.
Specifically, another object of the present invention is to provide a kind of method that the Early media service is provided, wherein when the Early media service is provided under the multimedia communication environment based on SIP at packet network, used the early-session of processing for Early media, therefore calling terminal can receive and the playback Early media, and irrelevant with conventional Dialog processing, thereby realized effectively and session management flexibly.
And, another object of the present invention is to provide a kind of Early media service, wherein prepare the Early media service plan for the terminal of not supporting early-session, and providing the Early media service to confirm in the past whether terminal supports early-session, thereby allowing normally to provide the Early media service by conventional session to the terminal of not supporting early-session.
Technical scheme
In order to realize this purpose, the invention provides a kind of when establishing call connection between calling terminal and the terminal called, utilize application server and the media server of dialogue-based initiation protocol (SIP) that the method for serving based on the Early media of SIP is provided, the method comprises: first invites step, and application server receives the first invitation message of Session Description Protocol (SDP) information that comprises calling terminal from the calling terminal of supporting early-session; Second invites step, receives the first invitation message and the application server of working under the B2BUA pattern sends the second invitation message of the SDP information that comprises calling terminal to terminal called; The media obtaining step, the application server that receives the first invitation message obtains the media information that will offer as Early media the content of calling terminal from media server; Early-session is initiated step, and application server initiates Early media is sent to from media server the early-session of calling terminal based on the media information that obtains; Early media provides step, and media server provides Early media by early-session to calling terminal; 180 the tinkle of bells receiving steps, application server receive 180 the tinkle of bells message of the SDP information that comprises terminal called from the terminal called that receives the second invitation message; Conventional session preparation process, the application server that receives 180 the tinkle of bells message is prepared the conventional session setup between calling terminal and terminal called; Stop response of step, application server receives the 200OK message according to the call of terminal called; Early media stops step, and the application server that receives according to the 200OK message of the call of terminal called sends termination messages to stop to send Early media to media server; And conventional session setup step, receive according to the application server of the 200OK message of the call of terminal called and finish conventional session setup between calling terminal and the terminal called.
In addition, in order to realize this purpose, the invention provides a kind of when establishing call connection between calling terminal and the terminal called, utilize application server and the media server of dialogue-based initiation protocol (SIP) that the method for serving based on the Early media of SIP is provided, the method may further comprise the steps: first invites step, and application server receives the first invitation message that is used for carrying out with terminal called call connection from calling terminal; Second invites step, receives the first invitation message and the application server of working under the B2BUA pattern sends the second invitation message that is used for carrying out with calling terminal call connection to terminal called; Media obtaining step, described application server obtain the media information that will offer as Early media the content of calling terminal from media server after receiving the first invitation message; The first session setup step, application server initiate Early media is sent to from media server the first session of calling terminal based on the media information that obtains; Early media provides step, and media server provides Early media by the first session to calling terminal; Called response of step, application server receives 200 OK message according to the call of terminal called; Early media stops step, and the application server that receives according to 200 OK message of the call of terminal called sends termination messages to stop to send Early media to media server; And the second session setup step, receive according to the application server of 200 OK message of the call of terminal called and initiate to be used for second session of between calling terminal and terminal called, communicating by letter.
Description of drawings
Fig. 1 is the block diagram that illustrates according to the Early media service provider system of an embodiment of the invention;
Fig. 2 illustrates the flow chart that the method for Early media service is provided according to terminal an embodiment of the invention, that be used to the support early-session in order; And
Fig. 3 be illustrate in order according to an embodiment of the invention, be used to the terminal of not supporting early-session that the flow chart of the method for Early media service is provided.
Embodiment
Below, the method for serving based on the Early media of SIP that provides according to an embodiment of the invention is described with reference to the accompanying drawings in more detail.
Before describing the present invention in detail, at first will describe configuring Session initiation Protocol of the present invention.Session initiation Protocol is very simple text based application layer control protocol, namely is to allow one or more participants to initiate together, upgrade and stop the signaling protocol of session.Session initiation Protocol provides flexibility and extensibility, and Session initiation Protocol utilizes this flexibility and extensibility to merge the various services that create with many other protocol groups.For example, will offer about the information of session interested group, and by Session initiation Protocol, the respective party of inviting expectation to talk adds session.Therefore, exchange the information of the medium type of opening about expectation by Session Description Protocol (SDP:session description protocol) and respective party.In addition, utilize the RTP of in Session Description Protocol, describing, the real-time multimedia service can be provided.
Fig. 1 shows the Early media service provider system according to dialogue-based initiation protocol of the present invention.As shown in the figure, the Early media service provider system comprises sip server, application server and media server.
The below will be elaborated to each element that consists of according to Early media service provider system of the present invention.At first, preferably, as the calling terminal 10 that receives according to the terminal of Early media service of the present invention, it has the Early media that receives the multimedia form and the performance of carrying out the Early media that receives to a certain extent.Namely, calling terminal should receive and carry out the multi-medium data such as text, image, moving image, animation etc., and as conventional the Early media voice and the voice data that provide, thereby undertaken to the call connection request of terminal called (terminating terminal) by the multi-medium data of correspondence to calling terminal subscriber announcement.
Terminal called 50 is before to have added corresponding service to receive the whole x end according to the subscriber of Early media service of the present invention.When the calling terminal request call connected, terminal called arranged to calling terminal and provides Early media until the information on services that establishes call connection.
In addition, when sip server received INVITE from calling terminal 10, whether the subscriber that sip server can confirm to receive the terminal called of corresponding message had added the Early media service.In the case, if the terminal called subscriber does not also add according to Early media service of the present invention, then sip server carry out to be used for providing to the calling terminal of correspondence the processing of traditional Early media.Here, the present invention will be described with only considering the terminal called subscriber to have added the situation of serving according to Early media of the present invention.
In the present invention, be used for providing the session of Early media can be categorized as early-session and conventional session.Here, early-session distinguishes with conventional session, be used for providing the additional session of Early media service, and conventional session is for carrying out the session of conventional media communication (talk) with the respective party terminal.In the present invention, if calling terminal is not supported early-session, then provide Early media by the normal conventional session, and do not consider the early-session that adds.If terminal is supported early-session, then provide Early media by utilizing independent session negotiation to process the early-session of initiating.
For this reason, application server of the present invention confirms by the header information of analyzing the INVITE that receives from calling terminal whether corresponding calling terminal supports early-session, thereby determines whether to provide service by early-session.
In addition, when sending INVITE to terminal called, application server is supported the B2BUA pattern operation of Session initiation Protocol, processes the INVITE that sends to terminal called in order to be independent of the management of calling terminal.After this, it is synchronous that application server makes the operation of the caller that is treated separately and terminal called under B2BUA pattern operation.
Here, the corresponding terminal called subscriber's of application server queries service configuration information and network setup information provide Early media with the selection according to the terminal called subscriber.Therefore, preferably, additionally be provided for storing terminal called subscriber's service configuration information and the storage server of network setup information.
Next, with reference to Fig. 2 and Fig. 3 the method for utilizing the Early media service provider system that the Early media service is provided is described.
At first, Fig. 2 illustrates in order according to flow chart an embodiment of the invention, that the method for Early media service is provided for the terminal of supporting early-session.
As shown in the figure, if calling terminal create to be used for the INVITE that establishes call connection with terminal called and to send this INVITE to sip server, the sip server that then receives this INVITE is passing through to analyze received INVITE, thereby after confirming whether terminal called subscriber as the target of INVITE has added service, received INVITE is routed to application server (step S10).
The SDP information of INVITE such as the IP address that can comprise calling terminal that is sent by calling terminal at this moment,, the information about terminal called, service processing identifier, calling terminal etc.Here, the IP address of calling terminal refers to the address value for sign calling terminal when communicating based on TCP/IP, and terminal called information can be the telephone number of terminal called etc.In addition, the service processing identifier is whether indication supports early-session according to calling terminal of the present invention value.After this, be worth to determine whether to initiate early-session by this.
Simultaneously, service described here is that it determines whether to provide the Early media of multimedia form be used to the service that provides according to Early media service of the present invention.When the terminal called subscriber does not also add service, carry out the processing that provides according to the Early media service of prior art.In addition, if the terminal called subscriber has added service, then process the next step for the Early media that the multimedia form is provided.
In this way, although in the present invention, sip server confirms whether the terminal called subscriber has added service, can provide Early media service of the present invention and no matter whether the terminal called subscriber has added service.In the case, sip server will only be carried out routing function.
Next, analyze the header information of corresponding INVITE from the application server of sip server reception INVITE, and confirm based on the service processing identifier whether calling terminal supports early-session, the INVITE that then will comprise the SDP information of calling terminal via sip server sends to terminal called (step S20).
Namely, application server is by confirming to indicate whether to support that the service processing identifier of early-session is included in the INVITE header, determine whether calling terminal supports early-session, and send INVITE by the B2BUA pattern operation of SIP to terminal called.
Here, the B2BUA pattern so that calling terminal and terminal called separately, and their operation also is processed separately and manages.The acting server of conventional Session initiation Protocol receives request message, and the message that receives is responded or the message of correspondence is routed to next device.On the contrary, under the B2BUA pattern, application server receives request message, then revises corresponding message or sends message to final destination with another form.Application server under the B2BUA pattern will send to terminal called from the INVITE that sip server receives by the channel that the channel with the operation of processing calling terminal is separated, then, synchronously process each operation of caller and terminal called with application server.
After sending INVITE to terminal called, application server is according to the affirmation of network setup information, by the service configuration information that sends message and inquire the terminal called subscriber from the media server receipt message of correspondence to the media server of correspondence, and obtain terminal called subscriber's media information (step S30).
Here, the processing of inquiry configuration information comprises following processing: inquiry corresponding with service subscriber (namely, the terminal called subscriber) service profile data storehouse (DB), confirm the sound source of basic sound source (content), each transmit leg or transmit leg group, the sound source of each time slot etc., and confirm to offer as Early media the sign (ID) of content of the transmit leg of current correspondence.
In addition, the processing of confirming network setup information comprises that affirmation will offer as Early media the processing of the position of the media server that the corresponding content of transmit leg stores.
Obtain the application server of service configuration information and network setup information by above-mentioned processing to the media server transmission INVITE of correspondence.At this moment, INVITE comprises the content ID that obtains based on service configuration information, and this content ID request media information (content format of the content that for example, provide) is provided application server.
The media server that receives INVITE from application server comprises 200 OK message as to the media information of the response of received INVITE (namely, the SDP information of the media that provide (for example, content format)), then send 200 OK message to application server.
Next, obtaining the application server that the required media information of service is provided from media server carries out and is used for providing the early-session of Early media service to initiate to process (step S40) to calling terminal.
Specifically, application server sends with early-session to calling terminal provides corresponding 183 session progress message with the initiation early-session.At this moment, application server sends the corresponding message comprise the media information that obtains from media server.
The calling terminal that receives 183 session progress message is handled through consultation based on the media information execution early-session that comprises in this message.Specifically, at first, calling terminal comprises provisional confirmation (PRACK:provisional acknowledge) message of the calling terminal SDP information of processing for Early media as the response to 183 session progress message to the application server transmission.PRACK message is corresponding to the response that early-session is provided.
At this moment, the SDP information in the PRACK message comprises coding/decoding information and the ability information such as calling terminal.More particularly, SDP information can comprise the ability (it provides as being included in a media information in the 183 session progress message) of processing encoding and decoding, the IP address of distributing to calling terminal, port numbers etc.
With sending PRACK message, calling terminal is also carried out the receiving port of opening media processing and is thought the processing of preparing from the media server receiving media.
Next, the application server that receives PRACK message from calling terminal is included in the SDP information that comprises the PRACK message in affirmation (ACK) message, and this ACK message is sent to media server, and send 200 OK message as the response to received PRACK message to calling terminal.At this moment, the media server that receives ACK message is determined the manageable medium type of calling terminal, form etc. based on the SDP information that comprises in the ACK message (for example, ability information of calling terminal etc.).
After this, application server sends INFO to media server and provides Early media with the request media server to calling terminal, and the media server that receives INFO provides Early media (step S50) to the calling terminal of correspondence.
Detailed description is provided the processing of Early media.At first, application server provides Early media by INFO order media server to calling terminal, and the media server that receives INFO sends Early media in response to the order that media are provided to calling terminal.In addition, media server sends 200 OK message in response to INFO to application server, thereby carries out the response to the INFO of correspondence.
In some cases, media server can not use INFO, and only begins to provide Early media to calling terminal by receiving ACK message.
At this moment, the Early media that offers calling terminal can be any or their combination in text, voice data (for example, voice, sound or audio), view data (for example, image, incarnation or figure release), moving image and the animation.Provide Early media continuously until between calling terminal and terminal called, establish call connection.In addition, preferably, receive and the calling terminal of playback media has the function that the repetition playback media reaches specified time interval, to prevent the Flickering Phenomenon (flickering phenomenon) when the media that playback receives.
Simultaneously, send 180 the tinkle of bells message by sip server to application server from the calling terminal that application server receives INVITE at step S20, this tinkle of bells information indication is in response to the tinkle of bells that receives INVITE (step S60).At this moment, 180 corresponding the tinkle of bells message comprise the SDP information of terminal called.If receive the SDP information of the application server for storage terminal called of 180 the tinkle of bells message, and send PRACK message in response to the 180 the tinkle of bells message that receive to terminal called, then this terminal called sends 200 OK message to application server, thereby carries out the response to PRACK message.
Here, in response to receiving the INVITE that sends from application server, carry out the transmission of 180 the tinkle of bells message of terminal called, and should not be interpreted as execution in step S60 behind step S50 owing to the presentation of the title of each step.On the contrary, application server can be prepared to provide Early media to calling terminal receive 180 the tinkle of bells message from terminal called before, this can solve such problem: when the characteristic owing to wireless network causes terminal called not send at once 180 the tinkle of bells message, owing to the operating lag of terminal called causes and can't provide Early media to calling terminal at once.
Simultaneously, receive 180 the tinkle of bells message from terminal called after, application server is carried out the preparation processing (step S70) that is used for initiating the conventional session between terminal called and the calling terminal.Conventional session and early-session are compared, the early-session of setting up in step S40 is be used to the session that Early media is provided, provide this early-session until set up call connection with terminal called in response to the call connection request of calling terminal, and conventional session is to carry out the session of the sending and receiving of media according to communication therebetween after the call connection of setting up between calling terminal and the terminal called.Prepare the processing of conventional session and provide Early media to carry out simultaneously by early-session to calling terminal.
In order to prepare to initiate conventional session, the 180 the tinkle of bells message that application server will comprise the SDP information of terminal called send to calling terminal, the initiation that calling terminal is carried out conventional Dialog processing based on the 180 the tinkle of bells message that receive is processed, and sends PRACK message in response to 180 the tinkle of bells message to application server simultaneously.The application server that receives PRACK message sends 200 OK message, thereby carries out the response of corresponding PRACK message.
After this, the action of carrying out call connection as the terminal called subscriber (for example, off-hook or press communications buttons), thereby when making terminal called make response to the call connection request of calling terminal, application server stops to send Early media, and initiates conventional session (step S80) between calling terminal and terminal called.
More particularly, terminal called sends 200 OK message corresponding to terminal called subscriber's response action to application server.The 200 OK message of this moment (response message corresponding with the INVITE that receives from application server at step S20) mean that the invitation of calling terminal is accepted.
The application server that receives the 200 OK message of indicating the subscriber to make response from terminal called sends BYE message to media server, to stop to provide Early media to calling terminal.The media server that receives BYE message is carried out the processing that is used for stopping to provide to calling terminal Early media, and sends 200OK message as the response to BYE message to application server.
After this, application server transmits 200OK message to calling terminal, notifying the terminal called subscriber to make response to the calling terminal subscriber, thereby carries out response to the INVITE that receives from calling terminal at step S10.The calling terminal that receives 200OK message sends the ACK message corresponding with this calling terminal to application server.The application server that receives ACK message from calling terminal finally sends corresponding ACK message to terminal called.
Establish call connection between calling terminal and terminal called in this way, after this, calling terminal and terminal called are carried out the media communication corresponding with practical communication by conventional session.At this moment, (RTP) realizes media communication by RTP, and carries out RTP and filter by conventional session sending and receiving media the time, therefore, and can not be from except the respective party terminal of current communication, receiving any media.
Namely, when the step that Early media is provided by early-session is switched to step by conventional session sending and receiving media, because the problem of network or the characteristic of IP operation maybe may receive other media even also may receive Early media after initiating conventional session.Therefore, calling terminal should have filtering function to avoid this phenomenon.
In addition, when the step that Early media is provided is switched to the step of the conventional media of sending and receiving, if owing to the problem in the hand-off process causes occurring empty transmission, then preferably, calling terminal repeats Early media or the processing of execution rest image that playback receives, until the call connection of foundation and terminal called is switched the empty transmission problem that occurs to solve according to session.
Next, Fig. 3 be illustrate in order according to an embodiment of the invention, be used to the terminal of not supporting early-session that the flow chart of the method for Early media service is provided, wherein show an execution mode that utilizes conventional session that the Early media service is provided.
As shown in the figure, if calling terminal create to be used for the INVITE that establishes call connection with terminal called and to send this INVITE to sip server, the sip server that then receives INVITE is routed to application server (step S10 ') with received INVITE after depending on that by analysis INVITE that situation receives confirms whether terminal called subscriber as the target of INVITE has added service.
As the execution mode of Fig. 2, the INVITE that is sent by calling terminal can comprise the information of the SDP information of IP address such as calling terminal, the information about terminal called, service processing identifier, calling terminal etc.
At this moment, support in terminal INVITE comprises whether indicating terminal supports the service processing identifier of early-session in the embodiments of the present invention of early-session, to provide service by the early-session that separates with conventional session.Yet, service is provided and does not confirm whether terminal supports early-session in the situation that can talk about reunification by routine, in INVITE, can not comprise the service processing identifier or can not confirm.
In addition, Early media service of the present invention can only offer service subscriber.In the case, if the terminal called subscriber not yet adds Early media service of the present invention, then provide the processing according to the ring-back tone of prior art.In the situation that terminal called has added service, carry out the step of the Early media that the multimedia form is provided.
Analyze the header information of corresponding INVITE from the application server of calling terminal reception INVITE by sip server, and confirm based on the service processing identifier whether calling terminal supports early-session, and send INVITE (step S20 ') via sip server to terminal called.
That is, whether application server is included in by the service processing identifier of confirming to indicate whether to support early-session and confirms in the INVITE header whether calling terminal supports early-session.In this way, in this embodiment, application server recognizes calling terminal and does not support early-session, then the B2BUA pattern operation by Session initiation Protocol sends INVITE to terminal called, the operation of calling terminal separates with the operation of terminal called under this pattern operation, and the operation that separates is processed respectively.At this moment, the INVITE that sends to terminal called comprises the SDP information of calling terminal.
After this, application server queries terminal called subscriber's service configuration information, confirm network setup information, and send message and obtain terminal called subscriber's media information (step S30 ') from the media server receipt message of correspondence by the media server to correspondence.
That is, after INVITE was sent to terminal called from calling terminal, application server was prepared to provide the Early media service to calling terminal.At first, if the terminal called subscriber adds service, then application server queries service profile data storehouse with the configuration information of confirming corresponding subscriber (namely, offer the content of calling terminal type, the condition of content etc. is provided), and confirm that network setup information is to confirm the position of corresponding media server.
Obtain the application server of service configuration information and network setup information by above-mentioned processing to the media server transmission INVITE of correspondence.At this moment, INVITE comprises based on the SDP information of the ability information of service configuration information and indication status of calling terminal and the content ID that selects.Utilize this INVITE, application server request media information (content format of the service that for example, provide etc.).
The media server that receives INVITE from application server (is for example determined the manageable media information of calling terminal based on the SDP information of the calling terminal the INVITE, content format etc.), this media server is included in media information in the 200OK message, then this 200OK message is sent to application server.
Simultaneously, the application server that receives about the 200OK message of media information sends ACK message to media server, thereby carries out the response to 200OK message.Can after the middle transmission 183 session progress message of step S40 ', send this ACK message.
Next, obtain the application server execution and the processing (step S40 ') of calling terminal initiation session so that Early media to be provided of media information from media server.More particularly, at first, application server sends the 183 session progress message comprise the media information that obtains from media server to calling terminal, to initiate to be used for providing to calling terminal the session of Early media.
The calling terminal that receives 183 session progress message is opened the receiving port for the treatment of the Early media that after this will receive, and sends PRACK message in response to the 183 session progress message that receive to application server.Application server is to the 200OK message of calling terminal transmission for this PRACK message.
In the situation of execution mode shown in Figure 2, utilize PRACK message to send the SDP information of calling terminal, with independent negotiation early-session.Yet in the present embodiment, owing to calling terminal is not supported early-session and utilized conventional session that the Early media service is provided, so PRACK message does not comprise SDP information.
Process if finish by this way be used to the session setup that Early media is provided, then application server sends INFO to media server and provides Early media with request to calling terminal, and the media server that receives INFO provides Early media (step S50 ') to the calling terminal of correspondence.
Specifically, application server comes the order media server to provide Early media to calling terminal by INFO, the media server that receives INFO sends 200OK message to application server, thereby carries out receiving the response of corresponding INFO.Except sending response message, media server is according to the order that media are provided, to the Early media of calling terminal transmission according to terminal called subscriber's service configuration information.
At this moment, the Early media that offers calling terminal can be any or their combination in text, voice data (for example voice, sound or audio), view data (for example image, incarnation or figure release), moving image and the animation.Provide continuously Early media, until between calling terminal and terminal called, establish call connection.
In addition, preferably, receive and the calling terminal of playback media has the function that the repetition playback media reaches specified time interval, to prevent the Flickering Phenomenon (flickering phenomenon) when the media that playback receives.
Simultaneously, in Fig. 3, if media server sends 200OK message at step S30 ' to application server, then application server sends ACK message at once as response.Yet, receive the application server of 200OK message from media server can be at completing steps S40 ' rear or be right after after among step S40 ', sending 183 session progress message to calling terminal, send ACK message to media server.
In addition, when application server sends ACK message to media server after step S40 ' finishes, may be omitted in the middle application server of step S50 ' and send the step of INFO and media server to media server and send step as the 200OK message of response to application server.In the case, media server receives ACK message from application server, thereby provides Early media to calling terminal.
Simultaneously, after this send 180 the tinkle of bells message via sip server to application server at step S20 ' from the terminal called that application server receives INVITE, this 180 the tinkle of bells message indication is in response to the tinkle of bells that receives INVITE (step S60 ').At this moment, 180 corresponding the tinkle of bells message comprise the SDP information of terminal called.If receive 180 the tinkle of bells message the application server for storage terminal called SDP information and send PRACK message in response to 180 the tinkle of bells message to terminal called, then terminal called sends 200OK message to application server, thereby carries out the response to PRACK message.
Here, should be appreciated that the transmission of carrying out 180 the tinkle of bells message of terminal called corresponding to receiving the INVITE that sends from application server, and should not be interpreted as the rear execution in step S60 ' at step S50 ' because of the presentation of the title of each step.Yet, application server can be prepared to provide Early media to calling terminal receive 180 the tinkle of bells message from terminal called before, this can solve such problem: when the characteristic owing to wireless network causes terminal called not send at once 180 the tinkle of bells message, owing to the operating lag of terminal called causes and can't provide Early media to calling terminal at once.
After this, when the terminal called subscriber carry out call connection action (for example off-hook or press communications buttons), and thereby terminal called when the call connection request of calling terminal is made response, application server sends the termination order stop to send Early media to media server, and initiates the conventional session (step S70 ') that communicates between calling terminal and terminal called.
If describe by step, then terminal called sends the 200OK message corresponding with terminal called subscriber's response action to application server.The 200OK message of this moment (response message corresponding with the INVITE that receives from application server at step S20 ') means that the invitation of calling terminal is accepted.
When the terminal called subscriber accepted the invitation of calling terminal, application server was carried out session updates processing and service termination, with sending and receiving media after establishing call connection between calling terminal and the terminal called.
Receive 200OK message from terminal called and send UPDATE (renewal) message as the application server to the response of INVITE to calling terminal, with initiation session between calling terminal and terminal called.At this moment, UPDATE message comprises the SDP information of the terminal called of storing when receiving 180 the tinkle of bells message of terminal called.
The calling terminal that receives UPDATE message from application server is carried out session information and is upgraded and process for the media communication that carries out with terminal called, and sends 200OK message in response to UPDATE message to application server.
In addition, when terminal called subscriber response during in the call connection request of calling terminal, application server sends BYE message to media server, and the request media server stops to provide the Early media service to calling terminal.The media server that receives BYE message stops to send Early media to calling terminal, and to the 200OK message of application server transmission in response to BYE message.
Except aforementioned operation, application server also transmits 200OK message according to terminal called subscriber's response to calling terminal, receives the calling terminal of 200OK message in response to 200OK message, sends ACK message via application server to terminal called.
In this way, establish call connection between calling terminal and terminal called, after this, calling terminal and terminal called are carried out the media communication corresponding with practical communication by new session more.At this moment, (RTP) finishes media communication by RTP, and carries out RTP and filter by session sending and receiving media the time, therefore, and can not be from except the respective party terminal of current communication, receiving any media.
That is, as mentioned above, when the step that Early media is provided is switched to the step of the conventional media of sending and receiving, because the problem of network or the characteristic of IP operation, maybe may receive other media even behind new session more, also may receive Early media.Therefore, terminal should have the function of filtration media.
In addition, when the step that Early media is provided is switched to the step of sending and receiving media, if owing to the problem in the hand-off process causes occurring empty transmission, then preferably, calling terminal repeats Early media or the processing of execution rest image that playback receives, until be connected with the actual call of terminal called according to conventional session establishment, switch the empty transmission problem that occurs to solve according to session.
The method that provides based on the Early media service of SIP has more than been described.Although specific preferred implementation describe and illustration the present invention, but the person skilled in the art will easily understand, in the situation that does not break away from the spirit and scope of the present invention that limited by appended claims, can carry out various changes and distortion to the present invention.
Industrial applicibility
As mentioned above, according to the method that provides based on the Early media service of SIP of the present invention, if according to the call connection of the request foundation of calling terminal and terminal called the time, provide Early media to calling terminal, then can provide Early media by multi-medium data (such as text, image, moving image, animation etc.) and the form of voice data, therefore realize user's expectation and maximized user's satisfaction.
In addition, according to the present invention, by according to based on the B2BUA pattern operation of the Session initiation Protocol of calling terminal and early-session agreement calling terminal and terminal called being carried out independently operational administrative, even when terminal called is in the abnormal operation state, also can normally provide the Early media service to calling terminal.
In addition, according to the present invention, advantageously, owing to used the packet network that carries out the Session initiation Protocol of a plurality of communications based on available single circuit, thereby can when Early media is provided, effectively use circuit resource.In addition, according to the present invention, because the early-session that is separated by the conventional session with sending and receiving grouping provides the Early media service, therefore can prevent the media blanking phenomenon (media blank phenomenon) that the call connection set up between according to calling terminal and terminal called may occur when early-session is switched to the conventional session that sending and receiving divides into groups.In addition, because calling terminal can receive and the playback Early media independently, and irrelevant with conventional session, therefore can be effectively and managing conversation neatly.And, when needs possess the attaching terminal ability (terminating capability) of processing Early media (such as encoding and decoding etc.), can effectively provide such attaching terminal ability.
In addition, according to the present invention, provide a kind of terminal to not supporting early-session that the method for Early media service is provided, and confirm before the Early media service is provided whether early-session can be supported, thereby can the Early media service be offered the terminal of not supporting early-session by conventional session.
Claims (28)
1. method that Early media is provided during the call connection of the dialogue-based initiation protocol (SIP) between calling terminal and the terminal called, the method may further comprise the steps:
Receive the first invitation message that comprises the first Session Description Protocol (SDP) information from described calling terminal, and send the second invitation message that comprises a SDP information to described terminal called;
After receiving described the first invitation message, obtain and to offer the media information of the content of described calling terminal as Early media, and be initiated to the early-session of described calling terminal based on the media information that obtains;
Provide described Early media by described early-session to described calling terminal;
Receive the 180 the tinkle of bells message that comprise the 2nd SDP information from the described terminal called that receives described the second invitation message, and send described the 2nd SDP information to described calling terminal;
Reception is according to the 200OK message of the call of described terminal called, and stops to provide described Early media; And
To the described 200OK message of described calling terminal transmission according to the call of described terminal called, and between described calling terminal and described terminal called, initiate conventional session.
2. the method for claim 1, wherein said the first invitation message comprise the identifier whether described calling terminal of indication supports early-session, and the method also is included in media information and obtains identifier in described the first invitation message of front affirmation.
3. method as claimed in claim 2, wherein said identifier is included in the header of the first invitation message.
4. the method for claim 1, wherein early-session initiates to comprise: send the 183 session progress message that comprise the media information that obtains to described calling terminal; And
Receive the provisional confirmation PRACK that comprises for the treatment of the Three S's DP information of described Early media from described calling terminal, and to the 200OK message of described calling terminal transmission for this PRACK.
5. the method for claim 1, wherein 180 the tinkle of bells receive and also comprise: send PRACK for described 180 the tinkle of bells message to described terminal called, and receive 200OK message for described PRACK from described terminal called.
6. method as claimed in claim 5, wherein sending described the 2nd SDP information to described calling terminal also comprises: receive PRACK from the calling terminal that receives described the 2nd SDP information, and to the 200OK message of described calling terminal transmission for described PRACK.
7. method as claimed in claim 6, wherein conventional session setup comprises: receive ACK from the calling terminal that receives according to the described 200OK message of the call of described calling terminal, and the ACK that sends and receives to described terminal called.
8. media information wherein occured and obtains in the method for claim 1 before receiving 180 the tinkle of bells message.
9. application server that Early media is provided during the call connection of the dialogue-based initiation protocol (SIP) between calling terminal and the terminal called, this application server can be carried out following steps:
Receive the first invitation message that comprises the first Session Description Protocol (SDP) information from described calling terminal, and send the second invitation message that comprises a SDP information to described terminal called;
After receiving described the first invitation message, obtain the media information that will offer as Early media the content of described calling terminal, and initiate early-session between media server and the described calling terminal based on the media information that obtains;
Provide described Early media by the described media server of described early-session request to described calling terminal;
Receive the 180 the tinkle of bells message that comprise described the 2nd SDP information from described terminal called, and send described the 2nd SDP information to described calling terminal; From described terminal called receipt of call response, and ask described media server to stop to provide described Early media; And
Send the call of described terminal called to described calling terminal, and between described calling terminal and described terminal called, initiate conventional session.
10. application server as claimed in claim 9, wherein 180 the tinkle of bells receive and also comprise: send provisional confirmation PRACK for described 180 the tinkle of bells message to described terminal called, and receive 200OK message for described PRACK from described terminal called.
11. application server as claimed in claim 9, wherein sending the 2nd SDP information to described calling terminal also comprises: receive PRACK from the calling terminal that receives described the 2nd SDP information, and to the 200OK message of described calling terminal transmission for described PRACK.
12. application server as claimed in claim 9, wherein conventional session setup comprises: receive ACK from the calling terminal that receives the call of described calling terminal, and the ACK that sends and receives to described terminal called.
13. media information wherein occured and obtains in application server as claimed in claim 9 before receiving 180 the tinkle of bells message.
14. application server as claimed in claim 9, wherein said the first invitation message comprises the described calling terminal of indication and whether supports the identifier of early-session, and the method also is included in media information and obtains identifier in described the first invitation message of front affirmation.
15. application server as claimed in claim 14, wherein said identifier is included in the header of the first invitation message.
16. application server as claimed in claim 9, wherein early-session initiates to comprise: send the 183 session progress message that comprise the media information that obtains to described calling terminal; And
Receive the PRACK that comprises for the treatment of the Three S's DP information of described Early media from described calling terminal, and to the 200OK message of described calling terminal transmission for this PRACK.
17. the method that Early media is provided during the call connection of the dialogue-based initiation protocol (SIP) between calling terminal and the terminal called, the method may further comprise the steps:
Receive the first invitation message that comprises the first Session Description Protocol (SDP) information from described calling terminal, and send the second invitation message that comprises a SDP information to described terminal called;
After receiving described the first invitation message, obtain the media information that will offer as Early media the content of described calling terminal, and be initiated to the first session of described calling terminal based on the media information that obtains;
Provide described Early media by described the first session to described calling terminal;
Receive the 180 the tinkle of bells message that comprise the 2nd SDP information from the described terminal called that receives described the second invitation message;
Reception is according to the 200OK message of the call of described terminal called, and stops to provide described Early media; And
To the described 200OK message of described calling terminal transmission according to the call of described terminal called, and between described calling terminal and described terminal called, initiate the second session.
18. method as claimed in claim 17, wherein 180 the tinkle of bells receive and also comprise: to the provisional confirmation PRACK of described terminal called transmission for described 180 the tinkle of bells message, and from the 200OK message of described terminal called reception for described PRACK.
19. method as claimed in claim 17, wherein the second session setup comprises: send updating message to the described calling terminal that comprises described the 2nd SDP information, and from the 200OK message of described calling terminal reception for described updating message.
20. method as claimed in claim 19, wherein the second session setup also comprises: to the 200OK message of described calling terminal transmission according to described call, and from described calling terminal reception ACK; And
To send to from the ACK that described calling terminal receives described terminal called.
21. media information wherein occured and obtains in method as claimed in claim 17 before receiving 180 the tinkle of bells message.
22. method as claimed in claim 17, wherein the first session setup comprises: send the 183 session progress message that comprise the media information that obtains to described calling terminal; And
From the PRACK of described calling terminal reception for the treatment of described Early media, and to the 200OK message of described calling terminal transmission for this PRACK.
23. the application server that Early media is provided during the call connection of the dialogue-based initiation protocol (SIP) between calling terminal and the terminal called, this application server can be carried out following steps:
Receive the first invitation message that comprises the first Session Description Protocol (SDP) information from described calling terminal, and send the second invitation message that comprises a SDP information to described terminal called;
After receiving described the first invitation message, obtain the media information that will offer as Early media the content of described calling terminal, and initiate the first session between media server and the described calling terminal based on the media information that obtains;
Provide described Early media by the described media server of described the first session request to described calling terminal; Receive the 180 the tinkle of bells message that comprise the 2nd SDP information from described terminal called;
Reception is according to the 200OK message of the call of described terminal called, and asks described media server to stop to provide described Early media; And
After the described 200OK message that receives according to the call of described terminal called, send the 2nd SDP information to described calling terminal, and initiate the second session between described calling terminal and described terminal called.
24. application server as claimed in claim 23, wherein 180 the tinkle of bells receive and also comprise: to the provisional confirmation PRACK of described terminal called transmission for described 180 the tinkle of bells message, and from the 200OK message of described terminal called reception for described PRACK.
25. application server as claimed in claim 23, wherein the second session setup comprises: send updating message to the described calling terminal that comprises described the 2nd SDP information, and from the 200OK message of described calling terminal reception for described updating message.
26. application server as claimed in claim 23, wherein the second session setup also comprises: to the 200OK message of described calling terminal transmission according to described call, and from described calling terminal reception ACK; And
To send to from the ACK that described calling terminal receives described terminal called.
27. media information wherein occured and obtains in application server as claimed in claim 23 before receiving 180 the tinkle of bells message.
28. application server as claimed in claim 23, wherein the first session setup comprises: send the 183 session progress message that comprise the media information that obtains to described calling terminal; And
From the PRACK of described calling terminal reception for the treatment of described Early media, and to the 200OK message of described calling terminal transmission for this PRACK.
Priority Applications (1)
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| CN200910147418.4A CN101577724B (en) | 2006-06-09 | 2007-06-04 | The method that the Early media of dialogue-based initiation protocol is served is provided |
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| KR10-2006-0051814 | 2006-06-09 | ||
| PCT/KR2007/002709 WO2007142447A1 (en) | 2006-06-09 | 2007-06-04 | Method for providing early-media service based on session initiation protocol |
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| CN200910147418.4A Division CN101577724B (en) | 2006-06-09 | 2007-06-04 | The method that the Early media of dialogue-based initiation protocol is served is provided |
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| CN200910147418.4A Active CN101577724B (en) | 2006-06-09 | 2007-06-04 | The method that the Early media of dialogue-based initiation protocol is served is provided |
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| CN101938574B (en) * | 2009-06-30 | 2014-04-09 | 中兴通讯股份有限公司 | Method and system for transmitting coloring ring back tone information in packet switching domain, coloring ring back tone server and terminal |
| CN102340490B (en) * | 2010-07-23 | 2015-10-21 | 中兴通讯股份有限公司 | A kind of method and system realizing anchor of media |
| CN102014208A (en) * | 2010-12-02 | 2011-04-13 | 候万春 | Phone terminal capable of supporting curtain drawing call |
| CN102546662B (en) * | 2012-02-24 | 2015-04-22 | 杭州华三通信技术有限公司 | Method and device for branching call under gateway mode |
| CN102724640B (en) * | 2012-05-30 | 2018-06-01 | 中兴通讯股份有限公司 | The implementation method of video frequency color ring, apparatus and system |
| CN106713308B (en) * | 2016-12-21 | 2020-05-26 | 深圳中兴网信科技有限公司 | Method and device for transmitting media stream in real time |
| CN110971768B (en) * | 2019-12-06 | 2020-12-25 | 深圳震有科技股份有限公司 | SIP call processing method and system, computer equipment and medium |
| CN114401252B (en) * | 2022-01-29 | 2024-03-26 | 中国农业银行股份有限公司 | Calling method of telephone traffic system and telephone traffic system |
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| KR20050067913A (en) * | 2003-12-29 | 2005-07-05 | 주식회사 케이티 | System and its method for multimedia ring back service using session initiation protocol |
| CN1695385A (en) * | 2002-10-28 | 2005-11-09 | 华为技术有限公司 | A communication method for calling on the circuit switched domain of core networks of GSM/WCDMA |
| KR20060010590A (en) * | 2004-07-28 | 2006-02-02 | 에스케이 텔레콤주식회사 | Method and system for providing early media service |
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| CN1695385A (en) * | 2002-10-28 | 2005-11-09 | 华为技术有限公司 | A communication method for calling on the circuit switched domain of core networks of GSM/WCDMA |
| KR20050067913A (en) * | 2003-12-29 | 2005-07-05 | 주식회사 케이티 | System and its method for multimedia ring back service using session initiation protocol |
| KR20060010590A (en) * | 2004-07-28 | 2006-02-02 | 에스케이 텔레콤주식회사 | Method and system for providing early media service |
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| CN101577724B (en) | 2016-04-13 |
| CN101467420A (en) | 2009-06-24 |
| CN101577724A (en) | 2009-11-11 |
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