CN101009575A - Method for multiple early media services in one call process - Google Patents
Method for multiple early media services in one call process Download PDFInfo
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- CN101009575A CN101009575A CNA2006101715257A CN200610171525A CN101009575A CN 101009575 A CN101009575 A CN 101009575A CN A2006101715257 A CNA2006101715257 A CN A2006101715257A CN 200610171525 A CN200610171525 A CN 200610171525A CN 101009575 A CN101009575 A CN 101009575A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1069—Session establishment or de-establishment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1016—IP multimedia subsystem [IMS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/102—Gateways
- H04L65/1033—Signalling gateways
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1101—Session protocols
- H04L65/1104—Session initiation protocol [SIP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/40—Support for services or applications
- H04L65/403—Arrangements for multi-party communication, e.g. for conferences
Abstract
The disclosed method for multiple early media business during one calling based on IP multimedia system comprises: expanding the head field of SIP information in RFC 3959 file of IETF by adding a type configuration parameter for different media type; dividing the SDP in SIP information entity into the dialogue SDP and early-media SDP; the early-media platform in IP multimedia system differentiates early-media SDP according to received type configuration parameter in SIP information entity to provide business for the calling and called. This invention is simple and convenient, changes a little to network device, expands business field, and brings both-win for the provider and user.
Description
Technical field
The present invention relates to a kind of method that in the call process, realizes a plurality of early media services, exactly, relate to and a kind ofly in the call process, realize the method for a plurality of early media services, belong in the mobile communication technology value-added telecom services technical field based on IMS based on the IP multimedia system.
Background technology
Along with the development of communication network and the raising of people's living standard, the development trend personalized, that value-added telecom services have been represented in differentiated service.CRBT (CRBT, Color Ring Back Tone) is when business is the calling user dials called subscriber, the multimedia messages by called subscriber's customization that the calling subscriber received before conversation; When color image service then is the calling user dials called subscriber, the multimedia messages that the called subscriber received before conversation by calling subscriber's customization.Ring Back Tone service belongs to the business that called custom-made, caller are enjoyed, and color image service belongs to calling customized, called business of enjoying.CRBT and color image service all belong to Early media (Early Media) class business, and in recent years, this class business has obtained user's welcome and pursued, for telecom operators have created high income.
The RFC3959 file of IETF has been introduced the notion of Early media, and has studied the Early media presentation mode based on the Session Initiation Protocol of expansion.The RFC3959 file of IETF has been introduced the Configuration Type (early-session) of Early media in the message header field contents configuration (Content-Disposition) of SIP, so that can distinguish different Session Description Protocol SDP (Session DescriptionProtocol) part in the sip message body, the support that has provided protocol level that provides based on the early media services of SIP is provided this standard.RFC 3960 files of IETF also by gateway mode and application server mode expansion the presentation mode of ring-back tone (Ringing Tone) in the SIP environment.
But, above-mentioned these work and regulations for Early media are all carried out at certain independent early media services of realization in the call process, if in certain is once called out, will realize two or more early media services, such as realize CRBT and color image service in the call process, then above-mentioned these existing normative documents or standard all are helpless; Therefore how can only realize that to prior art the limitation of the early media services that certain is independent improves and break through in the call process, just become those skilled in the art and pay close attention to and the focus of research.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of method that can overcome the limitation of prior art, in the call process, realize a plurality of early media services based on IMS, the implementation procedure of the inventive method is simple, distinct, convenient, change to the network equipment is few, widened the field of value-added service, improved QoS, can bring doulbe-sides' victory for operator and user.
In order to achieve the above object, the invention provides a kind of method that in the call process, realizes a plurality of early media services based on the IP multimedia system, it is characterized in that: earlier a field of the Session initiation protocol SIP message in the RFC3959 file of the Internet engineering duty group IETF is expanded: set up a type configuration parameter (disposition-parm), be used to distinguish the Configuration Type (early-session) of different Early media; Again Session Description Protocol part SDP (Session DescriptionProtocol) in the sip message body is divided into two classes according to its signaling capability: conversation SDP and Early media SDP; Each early media services platform in the IP multimedia system is according to the type configuration parameter in its received SIP imformosome then, distinguish different Early media SDP, be respectively caller and called users corresponding early media services is provided, thereby in the call process, realize the flow process of a plurality of early media services.
Described type configuration parameter of setting up comprises two parts: parameter name and parameter value, wherein parameter is called the character string of setting, in order to identify the type configuration parameter field that this is set up, parameter value is set at the character string that characterizes early media services, and parameter value will dynamic expansion and definition along with the increase of early media services kind.
The back of the riding position of described type configuration parameter of setting up Configuration Type parameter of Early media in a field of original sip message, promptly a field of the sip message after the expansion is: Content-Disposition:early-session: parameter name=" parameter value ".
Parameter name is set at type, and parameter value is set at: color image service is mrt, and Ring Back Tone service is mrbt, and a field of the sip message after the expansion is: Content-Disposition:early-session:type=" mrt " | " mrbt ".
Described conversation SDP is employed SDP when carrying out media negotiation for conversation between the calling and called, and Early media SDP then is employed SDP when carrying out media negotiation in order to set up Early media between the calling and called.
Described each early media services platform is distinguished different Early media SDP according to the type configuration parameter in its received SIP imformosome, and being respectively caller and called users provides the operation of corresponding early media services to comprise following concrete steps:
(1) calling subscriber calls out called, comprise conversation SDP in the call request INVITE that caller is sent, this call request INVITE arrives the server S-CSCF of the service call conversation control function of caller home domain through the server P-CSCF of the Proxy Call Session Control Function of caller home domain;
(2) S-CSCF of caller home domain obtains the service filter criterion from the home subscriber server HSS of caller, and carry out professional route: if there are one or more Early media class calling services according to the service filter criterion, then this S-CSCF is triggered to calling the business platform of each corresponding Early media class calling service successively according to the difference of the priority of filter criteria by the height of service priority; After all Early media class calling services are finished separately corresponding service processing, this S-CSCF routes the call to the S-CSCF of called home domain by the INVITE of SIP, comprise conversation SDP, an one or more Early media SDP in this INVITE body, each Early media SDP distinguishes by the type configuration parameter of expansion;
(3) S-CSCF of called home domain triggers Early media class called service according to the filter criteria that obtains from the HSS of called ownership, is about to call out the business platform that is triggered to each corresponding Early media class called service; After all Early media class called services were finished Business Processing separately, the S-CSCF of called home domain was routed to INVITE called by the P-CSCF of called home domain;
(4) terminal called carries out call treatment, and return the affirmation message of INVITE: 183 message according to calling out the route principle, in this 183 message body, comprise the Early media SDP of the calling/called business of Early media class and the Early media SDP that terminal called provides, and distinguish each Early media SDP by the type configuration parameter of expansion; Each early media service platform is handled accordingly the Early media SDP in 183 message, and is finished corresponding media negotiation according to own professional demand;
(5) 183 message of carrying Early media SDP arrive calling terminal, carry out early media negotiation with calling terminal, and pass PRACK/200OK message in principle according to the calling route 183 message are replied, and in answering, finish the media negotiation of each early media services and user terminal;
(6) after each early media services platform is received terminal called 180 ALERTING messages, indication media resource function MRF server provides corresponding early media services, makes the user enjoy early media services;
(7) receive the message of answering of terminal called when each early media services platform: after the 200OK message, promptly stop to provide of early media services.
The present invention is a kind of method that realizes a plurality of early media services based on the IP multimedia system in the call process, its advantage is: the whole technical proposal of cooperating process of finishing a plurality of early media services in a call instance is to the influence of conventional network equipment and change very little: need only upgrade to existing Early media class application server, make it support the type configuration parametric t ype of the present invention's expansion; And for other non-Early media class application server and IMS network core device, owing to they can not handled Early media SDP, so can not upgrade.Like this, implementation procedure of the present invention is simple, distinct, convenient, realizes easily, has both widened the service field of value-added service, can improve the service quality of telecommunication service again, and good social benefit and economic benefit are arranged, and can bring doulbe-sides' victory for operator and user.
Description of drawings
Fig. 1 the present invention is based on the IP multimedia system realizes a plurality of early media services in the call process method flow block diagram.
Fig. 2 the present invention is based on the IP multimedia system realizes the method for a plurality of early media services in the call process an embodiment signaling time-sequence figure.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
Referring to Fig. 1, the present invention a kind ofly realizes the method for a plurality of early media services based on IMS in the call process, and this method mainly comprises following three operating procedures:
A, a field of the sip message in the RFC3959 file of IETF is expanded: set up a type configuration parameter (disposition-parm), be used to distinguish the Configuration Type (early-session) of different Early media.
The type configuration parameter is made up of parameter name and parameter value two parts, parameter name can be set at " type ", parameter value can be set at the character string that characterizes early media services, for example color image service with " mrt " expression, Ring Back Tone service with " mrbt " expression etc., parameter value can be along with the increase of early media services kind Dynamic Definition.The position of type configuration parameter that should be newly-increased is the back of Configuration Type (early-session) parameter that is placed on Early media, and a field of promptly original sip message is: Content-Disposition:early-session; A field of sip message of the present invention is: Content-Disposition:early-session:type=" mrt " | " mrbt ".
B, Session Description Protocol part SDP in the sip message body is divided into two classes according to its signaling capability: conversation SDP and Early media SDP.
The SDP that wherein converses is the SDP that uses when carrying out media negotiation for conversation between the calling and called, and this type of SDP generally carries in the sip message (as INVITE, 200OK, ACK) of non-1xx (with the message of 1 beginning) series message.Early media SDP is the SDP that uses when Early media carries out media negotiation for setting up, and this type of SDP generally carries in INVITE, 183 message and the response message (as PRACK) thereof of SIP.
Each early media services platform in C, the multimedia system is according to the type configuration parameter in its received SIP imformosome, distinguish different Early media SDP, be respectively caller and called users corresponding early media services is provided, thereby in the call process, realize the flow process of a plurality of early media services.This operating procedure can be subdivided into following seven content of operation:
C1: the calling subscriber calls out called, comprises conversation SDP in the call request INVITE that caller is sent, and the call request INVITE arrives the S-CSCF of caller home domain through the P-CSCF of caller home domain;
C2: the S-CSCF of caller home domain obtains the service filter criterion from the HSS of caller ownership, and carry out professional route: if there are one or more Early media class calling services according to the service filter criterion, then the S-CSCF of caller home domain is triggered to calling the business platform of each corresponding Early media class calling service successively according to the difference of the priority of filter criteria by the height of service priority; After all Early media class calling services are finished corresponding service processing, the S-CSCF of caller home domain routes the call to the S-CSCF of called home domain by the INVITE of SIP, comprise conversation SDP, an one or more Early media SDP in the INVITE body, each Early media SDP distinguishes by the type parameter of expansion;
C3: the S-CSCF of called home domain triggers Early media class called service according to the filter criteria that obtains from the HSS of called ownership, is about to call out the business platform that is triggered to each corresponding Early media class called service; After all Early media class called services were finished Business Processing separately, the S-CSCF of called home domain was routed to INVITE called by the P-CSCF of called home domain;
C4: terminal called carries out call treatment, and return the affirmation message of INVITE: 183 message according to calling out the route principle, in this 183 message body, comprise the Early media SDP of the calling/called business of Early media class and the Early media SDP of the early media services that terminal called provides, and distinguish each Early media SDP by the type configuration parametric t ype of expansion; Each early media service platform is handled accordingly the Early media SDP in 183 message, and is finished corresponding media negotiation according to own professional demand;
C5: 183 message of carrying Early media SDP arrive calling terminal, carry out early media negotiation with calling terminal, and pass PRACK/200OK message in principle according to the calling route 183 message are replied, and in answering, finish the media negotiation of each early media services and user terminal;
C6: after each early media services platform was received terminal called 180 ALERTING messages, indication Multimedia Resource Function MRF server provided corresponding early media services, makes the user enjoy early media services;
C7: the message of answering of receiving terminal called when each early media services platform: after the 200OK message, promptly stop to provide of early media services.
Referring to Fig. 2, introduce the present invention realizes a plurality of early media services in call concrete operations flow process.The caller home domain of the IP multimedia system among Fig. 2 comprises S-CSCF, Multimedia Caller Identification Service platform and media resource function server MRF, and called home domain comprises S-CSCF, Multimedia Ring Back Tone service platform and media resource function server MRF.For convenience of description, omit P-CSCF among Fig. 2, and omitted part message, as: the PRACK of 180 message and 200OK response thereof.Numbering among Fig. 2 after the message (a, b, c, d, e) is to be used to distinguish different SIP dialog.
1～2: calling is called, and originating S-CSCF routes calls to the Multimedia Caller Identification Service platform according to filter criteria, wherein carries calling subscriber UE1 conversation SDP in the INVITE.
3～4: in order to play Early media (polychrome), Multimedia Caller Identification Service platform and MRF carry out media negotiation: do not have SDP among the INVITE, carried the SDP (sdp-mrt) of MRF in the 200OK message.
5～6: the Multimedia Caller Identification Service platform has carried out after the Business Processing, calls out the called subscriber by S-CSCF, in this INVITE, has carried two SDP: conversation SDP (sdp-UE1) and Early media SDP (sdp-mrt).Wherein Early media SDP is by " Content-Disposition:early-session; Type=' mrt ' " identify the Early media SDP that this SDP is a color image service.
7:INVITE message arrives terminating S-CSCF, and terminating S-CSCF routes calls to the Multimedia Ring Back Tone service platform according to filter criteria.
8～9: the Multimedia Ring Back Tone service platform routes calls to terminating S-CSCF after carrying out Business Processing, and terminating S-CSCF is called out the called subscriber.
10～11: the called subscriber is by the sign of the early-session in the INVITE, know this time to call out and comprise early media services, therefore carry out Early media (polychrome) capability negotiation by 183 message, return sdp-mrt (SDP Offer) replied sdp-mrt ' (SDP Answer).
The PRACK of 12～15:10～11 message replys and the 200OK of PRACK responds.
16～17: dialed terminal bell, send 180 message to the Multimedia Ring Back Tone service platform.
18～19: the Multimedia Ring Back Tone service platform is learnt called subscriber's free time by 180 message, sends INVITE to MRF, carries out the early media negotiation of Multimedia Ring Back Tone service.MRF provides the Early media sdp:sdp-mrbt (SDP Offer) of multimedia color ring back tone in 200OK message.
20～21: the multimedia color ring back tone platform sends 183 message to the calling subscriber and carries out early media negotiation according to the medium sdp that obtains in 10,19.Know from 10,19 message: this 183 message is carried two Early media sdp:sdp-mrbt, sdp-mrt, and its Content-Disposition head is respectively: Content-Disposition:early-session; Type=' mrbt ' and Content-Disposition:early-session; Type=' mrt '.
22: above-mentioned 183 message reach the Multimedia Caller Identification Service platform, and the Multimedia Caller Identification Service platform extracts color image service sdp according to Content-Disposition, and the 200OK in 4 are carried out ACK reply.
23: the Multimedia Caller Identification Service platform is forwarded to the calling subscriber to 183 by S-CSCF after extracting polychrome sdp, still carries the Early media sdp:sdp-mrbt (SDP Offer) of Multimedia Ring Back Tone service in 183 message of this moment.
24: calling terminal indicates according to the early-session in 183 message, know this time to call out and comprise early media services, therefore carry out Early media (CRBT) capability negotiation by PRACK message, return sdp-mrbt (SDP Offer) replied sdp-mrbt ' (SDP Answer).
The 200OK of 25:PRACK replys.
26～27:, the PRACK message of carrying sdp-mrbt ' is routed to the Multimedia Ring Back Tone service platform according to the route principle.
The 200OK of 28～29:PRACK message replys.
30: according to the sdp-mrbt ' in 27, the 200OK to 19 carries out ACK and replys, and carries the SDP Answer:sdp-mrbt ' of Multimedia Ring Back Tone service in this ACK message.
31～34: 180 message of indication called subscriber's free time reach Multimedia Caller Identification Service platform and calling terminal respectively.
35～38: Multimedia Caller Identification Service platform indication MRF plays polychrome, and MRF reports polychrome to play situation by INFO.This moment, the called subscriber enjoyed Multimedia Caller Identification Service.
39～42: Multimedia Ring Back Tone service platform indication MRF coloring ring back tone playing, MRF reports polychrome to play situation by INFO.This moment, the calling subscriber enjoyed Multimedia Ring Back Tone service.
43～44: represent called 200OK message of answering, wherein carried the replying of conversation SDP (sdp-UE1 ').
45～46: called answering, Multimedia Ring Back Tone service platform indication (by BYE message) MRF stops coloring ring back tone playing.
47～48: represent called 200OK message of answering, wherein carried the replying of conversation SDP (sdp-UE1 ').
49～50: called answering, Multimedia Caller Identification Service platform indication (by BYE message) MRF stops to play polychrome.
51～52: represent called 200OK message of answering, wherein carried the replying of conversation SDP (sdp-UE1 ').
53～58:51～52,47～48,43～44 ACK replys, and this moment, the calling and called user's communication was set up.
The present invention finishes the implementation method of a plurality of early media services and has carried out implementing test in the IMS laboratory of company of Eastcom-BUPT in a call instance, test is successful, finished the test of performance verification: comprise multimedia color ring back tone and Multimedia Caller Identification Service in the same call instance, realized goal of the invention.
Claims (6)
1, a kind of method that in the call process, realizes a plurality of early media services based on the IP multimedia system, it is characterized in that: earlier a field of the Session initiation protocol SIP message in the RFC3959 file of the Internet engineering duty group IETF is expanded: set up a type configuration parameter, be used to distinguish the Configuration Type of different Early media; Again Session Description Protocol part SDP in the sip message body is divided into two classes according to its signaling capability: conversation SDP and Early media SDP; Each early media services platform in the IP multimedia system is according to the type configuration parameter in its received SIP imformosome then, distinguish different Early media SDP, be respectively caller and called users corresponding early media services is provided, thereby in the call process, realize the flow process of a plurality of early media services.
2, the method for a plurality of early media services of realization according to claim 1, it is characterized in that: described type configuration parameter of setting up comprises two parts: parameter name and parameter value, wherein parameter is called the character string of setting, in order to identify the type configuration parameter field that this is set up, parameter value is set at the character string that characterizes early media services, and parameter value will dynamic expansion and definition along with the increase of early media services kind.
3, the method for a plurality of early media services of realization according to claim 2, it is characterized in that: the back of the riding position of described type configuration parameter of setting up Configuration Type parameter of Early media in a field of original sip message, promptly a field of the sip message after the expansion is: Content-Disposition:early-session: parameter name=" parameter value ".
4, according to the method for claim 2 or a plurality of early media services of 3 described realizations, it is characterized in that: parameter name is set at type, parameter value is set at: color image service is mrt, Ring Back Tone service is mrbt, and a field of the sip message after the expansion is: Content-Disposition:early-session:type=" mrt " | " mrbt ".
5, the method for a plurality of early media services of realization according to claim 1, it is characterized in that: described conversation SDP is employed SDP when carrying out media negotiation for conversation between the calling and called, and Early media SDP then is employed SDP when carrying out media negotiation in order to set up Early media between the calling and called.
6, the method for a plurality of early media services of realization according to claim 1, it is characterized in that: described each early media services platform is according to the type configuration parameter in its received SIP imformosome, distinguish different Early media SDP, being respectively caller and called users provides the operation of corresponding early media services to comprise following concrete steps:
(1) calling subscriber calls out called, comprise conversation SDP in the call request INVITE that caller is sent, this call request INVITE arrives the server S-CSCF of the service call conversation control function of caller home domain through the server P-CSCF of the Proxy Call Session Control Function of caller home domain;
(2) S-CSCF of caller home domain obtains the service filter criterion from the home subscriber server HSS of caller, and carry out professional route: if there are one or more Early media class calling services according to the service filter criterion, then this S-CSCF is triggered to calling the business platform of each corresponding Early media class calling service successively according to the difference of the priority of filter criteria by the height of service priority; After all Early media class calling services are finished separately corresponding service processing, this S-CSCF routes the call to the S-CSCF of called home domain by the INVITE of SIP, comprise conversation SDP, an one or more Early media SDP in this INVITE body, each Early media SDP distinguishes by the type configuration parameter of expansion;
(3) S-CSCF of called home domain triggers Early media class called service according to the filter criteria that obtains from the HSS of called ownership, is about to call out the business platform that is triggered to each corresponding Early media class called service; After all Early media class called services were finished Business Processing separately, the S-CSCF of called home domain was routed to INVITE called by the P-CSCF of called home domain;
(4) terminal called carries out call treatment, and return the affirmation message of INVITE: 183 message according to calling out the route principle, in this 183 message body, comprise the Early media SDP of the calling/called business of Early media class and the Early media SDP that terminal called provides, and distinguish each Early media SDP by the type configuration parameter of expansion; Each early media service platform is handled accordingly the Early media SDP in 183 message, and is finished corresponding media negotiation according to own professional demand;
(5) 183 message of carrying Early media SDP arrive calling terminal, carry out early media negotiation with calling terminal, and pass PRACK/2000K message in principle according to the calling route 183 message are replied, and in answering, finish the media negotiation of each early media services and user terminal;
(6) after each early media services platform is received terminal called 180 ALERTING messages, indication media resource function MRF server provides corresponding early media services, makes the user enjoy early media services;
(7) receive the message of answering of terminal called when each early media services platform: after the 200OK message, promptly stop to provide of early media services.
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| CN101330750B (en) * | 2007-08-03 | 2012-02-08 | 中兴通讯股份有限公司 | Method for simultaneously playing multimedia information for call subscriber and called subscriber |
| CN102510560A (en) * | 2011-11-17 | 2012-06-20 | 河南翔东科技发展有限公司 | Personalized multimedia ring tone service system and method therefor |
| CN101374259B (en) * | 2007-08-22 | 2012-08-08 | 华为技术有限公司 | Method and apparatus for implementing multimedia color ring and multimedia polychrome business |
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