CN101064863A - Method and system for providing media resource service in IMS network - Google Patents
Method and system for providing media resource service in IMS network Download PDFInfo
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- CN101064863A CN101064863A CNA2006100775778A CN200610077577A CN101064863A CN 101064863 A CN101064863 A CN 101064863A CN A2006100775778 A CNA2006100775778 A CN A2006100775778A CN 200610077577 A CN200610077577 A CN 200610077577A CN 101064863 A CN101064863 A CN 101064863A
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Abstract
The invention provides a method and system of providing medium resource service in IMS network. The method is: said IMS network possesses application server, service calling operation control function entity, medium resource function controller and medium resource function processor, thereinto, a interface is set between said medium resource function controller and medium resource function processor to support medium resource preparation, when IMS network provides medium resource service, the application server and medium resource server builds dialog in mode of resource preserving. By the invention, when IMS network provides medium resource service, resource obligating process is introduced in building of dialog between AS-MRFC, reliability of medium resource service is increased; When bandwidth of medium file provided by network is not enough, quality of medium resource service is got in advance.
Description
Technical field
The present invention relates to the IMS network, the method and system of medium resource service is provided under particularly a kind of IMS network.
Background technology
In today of communication and the development of IT technology height, along with the appearance of the IP technology of striding the link layer transmission medium and popularizing rapidly of Internet application, people also no longer content just to single voice communication mode, and need brand-new multimedia communication mode, the fusion of the IPization of mobile communications network and fixed communication network, Internet and communication network to become the developing direction that industry is generally acknowledged undisputedly.
For satisfying the common requirements of more and more outstanding IP multimedia application, 3GPP (3rd Generation Partnership Project; The IP Multimedia System (IMS:IPMultimedia Subsystem) of the all-IP business network framework of 3rd Generation Partnership Project) on the packet carrying network basis, introducing, target is according to personalized user data, the shielding user mode access, the degree of opening of control professional ability provides multimedia communication experiences.
IMS is a subsystem that is superimposed upon in the WCDMA network that increases in the 3GPP R5 stage on the existing packet domain, adopt the bearer path of packet domain for its upper strata control signaling and media delivery, introduce Session initiation Protocol (SIP:Session Initiation Protocol) as professional control protocol, utilize simple, the easy expansion of SIP, media combination characteristics easily, by business control is separated with carrying control, provide abundant multimedia service.
Main functional entity comprises call conversation control entity (CSCF:Call SessionControl Function) among the IMS, functions such as control user registration, session control; Application server (AS:Application Server) provides miscellaneous service logic control function; Home subscriber server (HSS:Home Subscriber Server), the centralized management user contracting data; MGCF (MGCF:Media Gateway Control Function)/IP multimedia gateway (IM-MGW:IP Multimedia Media Gateway) is used for realizing and the circuit switching net interconnecting.
The user is by current location agent node P-CSCF (Proxy-CSCF; Proxy CSCF) inserts the IMS network, by the home domain service node S-CSCF (Serving-CSCF of its registered place; Serving CSCF) finishing session and business triggers control and controls mutual with the business of AS, media resource function controller (MRFC:Media Resource Function Controller)/Media Resource Function Processor (MRFP:Media Resource Function Processor) is session and the professional service that media resource is provided.
Being illustrated in figure 1 as the IMS network provides the related entities Organization Chart of medium resource service.Below the effect in medium resource service is provided is elaborated to each related entities.Wherein,
Application server AS is providing the media services process logic of managing business, and which kind of media services decision uses, and indication media resource function entity carries out (comprising MRFC/MRFP) control of media resource.
S-CSCF, the service call service control function, mainly according to initial filter criteria (iFC:InitialFilter Criteria) call process transfer to AS.
MRFC/MRFP: the media resource controlled function mainly receives the medium resource service request from S-CSCF and AS, and indication media resource processing entities provides media services.Wherein, medium resource service comprises: playback, dual-tone multifrequency (DTMF:Dual Tone Multi Frequency) collect the digits, automatic speech recognition (ASR:Automatic Speech Recognition), encoding and decoding conversion and conferencing resource etc. is provided.In the above-mentioned entity framework, what ISC (IP multimedia Service Control) and Mr adopted is Session Initiation Protocol; And the H.248 agreement that Mp adopts.Wherein,
Session initiation Protocol SIP is by one of multimedia communications system framework agreement of IETF (Internet engineering duty group) formulation, be to be used for setting up, the application layer protocol of change or ending multimedia session, with RTP (RTP:Real time Transport Protocol)/real time control protocol (RTCP:Real Time Control Protocol), Session Description Protocol (SDP:Session DescriptionProtocol), real-time streaming protocol (RTSP:Real Time Streaming Protocol), name server agreements such as (DNS:Domain Name Server) cooperates, and finishes session foundation and media negotiation in the IMS network jointly; In case set up session, Media Stream will use Real-time Transport Protocol directly to transmit in bearing bed, can mutual flexibly multiple medium in a session;
Because SIP is based on disclosed Internet standard, have inherent advantage aspect voice, data service combination and the intercommunication, can cross over medium and equipment and realize calling out control, supporting abundant media formats, can dynamically increase/delete Media Stream, realize abundant more traffic performance easily.Simultaneously, SIP supports intelligence to professional and end side development, thereby alleviate network burden, itself support to comprise application layer mobility functions such as dynamic registration mechanism, location management mechanism, redirection mechanism and present/subscription characteristic, be convenient to expand new business, and agreement is simple, has generally acknowledged expansion potentiality, therefore, the application in IMS network and next generation network (NGN:Next Generation Network) is more and more.
Along with the expansion of Session Initiation Protocol range of application, ietf definition a plurality of expansions of SIP to adapt to new demand, comprise new method and header field, wherein relate to method for obligating resource.
The IMS network has service quality (QoS:Quality of Service) to guarantee that RFC3312 has defined in the SIP session and set up in the process, carries out the mechanism of QoS resource reservation to user service requirement.Be illustrated in figure 2 as the flow chart of QoS resource reservation, set up the flow process of session with the resource reservation mode.By adopting the resource reservation mode to set up session, can guarantee that the session both sides can have the chance of preparing resource, and can guarantee session in case set up, the situation that resource does not possess can not appear.
H.248 agreement is the definition of ITU-T SG16 normal structure, is specifically designed to the agreement of media resource control, can be used for controlling medium processing devices such as media gateway, media server.
H.248 the basic principle of agreement is: abstract in terminal the various resources on the medium processing device, terminal is divided into physical terminal and ephemeral terminations again.Wherein, physical terminal is represented some physical entities with semipermanent existence, as time division multiplexing (TDM:Time Division Multiplex) time slot; The public resource that on behalf of provisional application, ephemeral terminations use the back to discharge is as rtp streaming.Combination between the terminal is conceptualized as context, with the topological relation of describing between the terminal.Abstract based on these, call proceeding is actually terminal and contextual operation, finishes by command request between medium control device and the medium processing device and response, and order comprises increase, modification, deletion, notice etc.; Command parameter is called descriptor, is categorized as attribute (Property), signal (Signal), incident (Event), statistics (Statistic), and the parameter with professional correlation is polymerized to a bag (Package) in logic.Bag is the method for the Extended Protocol function that provides of agreement H.248.
Resource reservation is meant carrying out sessions carry and sets up in the process, and for guaranteeing the media services quality, for session keeps certain Service Source in advance, with the service quality in guaranteeing to serve, resource reservation as herein described comprises following aspect:
The reservation of media processing resources: mainly comprise the reservation of encoding and decoding resource, meeting audio mixing resource.The resource that may need from the resource bid of application server AS is an encoding and decoding tabulation or expection meeting audio mixing resource in many ways.
The carrying bandwidth resources: medium processing device is carried on aspects such as bandwidth, service priority and gives security for guaranteeing the media services quality for IP.Need on medium processing device, to reserve in advance, to guarantee service quality.
The media services content resource: the media services content of application server AS appointment may be the local voice file, also may be network file.For guaranteeing when medium processing device provides service, to guarantee that the media resource content can not go wrong, must check in advance whether this locality and network file exist; For guaranteeing service quality, can be in advance to the network file buffer memory of looking ahead, obtain Expected Results to guarantee service quality.During for Text To Speech (TTS:Text To Speech),, need carry out speech conversion in advance in order to ensure the speech play quality.
Like this, provide in the process, need set up conversation procedure between application server AS and the media resource function controller MRFC, to guarantee the reliability of flow process in the related service of IMS network media resource.
In the prior art, application server AS is in application media processing resources flow process, and it is not to adopt the resource reservation process that the session between AS and the MRFC is set up.Below to be example to the session between AS and the MRFC set up describes with the playback process flow.As shown in Figure 3, be resource bid and use are carried out in session between AS and the MRFC in the existing playback process flow chart.
As shown in the figure, step 1～3, subscriber equipment (UE:User Equipment) is initiated the INVITE call request, and S-CSCF has triggered the business on the AS according to initial filter criteria iFC; Step 4～7, the business that AS initiates is handled failure on S-CSCF; Step 8, application server AS triggers the playback application process; Step 9～12, AS indication MRFC carries out the negotiation of media resource SDP; Step 13～18, application server AS is according to carrying out session negotiation between SDP information of consulting between AS and the UE and the user terminal; Step 19 is carried out QoS foundation and resource reservation and is prepared; The modification of QoS state after QoS is ready to complete, is carried out in step 20～23; Step 24～25, response invite message; Step 26～27 are to the affirmation message of MRFC; Step 28 has been carried out playback; Step 29～30, the affirmation message of UE.In addition, send each INVITE after, all can reply a 100trying message, not shown.
Though, to mention QoS foundation and resource reservation in the prior art and prepare, this only is meant that user side inserts the preparation of channel resource.From this process, lack the flow process that resource reservation and playback resource are prepared between AS and the MRFC.
By above-mentioned flow process as can be known, shortcoming of the prior art is:
1.UE the SDP information of consulting between～the AS is not upgraded on MRFC, therefore, only is applicable to comprise single encoding and decoding or MRFC only select a kind of encoding and decoding in the encoding and decoding tabulation situation among the SDP.
2. work as the network side resource and need under the situation that QoS prepares and media resource is prepared, this process can not satisfy network side QoS to be set up and the media resource set-up procedure, the situation that flow process is failed at last can occur.
Summary of the invention
The object of the present invention is to provide the method and system that medium resource service is provided under a kind of IMS network, make when the IMS network provides medium resource service to the user, introduce the resource reservation processing during session between AS～MRFC is set up, thereby improved the reliability and the quality of medium resource service.
The invention provides the method that medium resource service is provided under a kind of IMS network, be provided with application server, service call business control function body, media resource function controller and Media Resource Function Processor in the described IMS network, wherein, between described media resource function controller and the Media Resource Function Processor interface is set, be used for supporting the indication media resource to prepare, when the IMS network provides medium resource service, when the IMS network provides medium resource service, set up session between application server and the media resource function controller, comprise step:
Application server triggers medium resource service;
Hold consultation with the resource reservation mode between application server and the media resource function controller;
Subscriber equipment carries out service quality foundation, Media Resource Function Processor carries out media resource and bearing resource is prepared.
Described media resource is prepared to comprise at least: file is looked ahead and/or the prior notice of the content of text of buffer memory or text-converted speech processes.
Described media resource prepare to adopt expansion H.248 the mode of bag realize that H.248 this expansion is wrapped to indicate at least and looked ahead and/or the path and the title of buffer memory or prior notice file and report operating result.
H.248, described expansion is wrapped at least and is comprised: attribute, incident, signal, statistical information and rule parameter.
Described signal parameter comprises at least:
Obtain file signal: be used to indicate media resource processing arrangements to obtain the media resource file, and according to operation result uploading;
Cache file signal: be used to indicate media resource processing arrangements to obtain and the buffered media resource file;
Content of announcement signal: be used for the content that the prior notice resource processing arrangements carries out the text-converted voice, and change in advance.
Also comprise step:
Mutual resource preparation between application server and the media resource function controller, and Media Resource Function Processor reports media resource to prepare the result and bearing resource is set up the result;
Application server indicates described media resource function controller to provide service for the user;
Described media resource function controller indication Media Resource Function Processor carries out media services.
Application server triggers medium resource service, comprises step:
After described service call session control function entity is received user's the session request of setting up, after judging according to user's initial filter criteria, send session to application server and set up request message;
After application server receives that request message is set up in this session, trigger medium resource service according to service logic.
Carry out conversation description protocol negotiation with the resource reservation mode between application server and the media resource function controller, comprise step:
Application server sends session to the service call business control function body and sets up request message, sends this session then and sets up request message to corresponding media resource function controller;
After the media resource function controller receives that request message is set up in this session, indication Media Resource Function Processor reserved media processing resources;
Described Media Resource Function Processor provides response message affirmation carrying and carries out the media resource preparation according to application server.
According to this method, media resource function controller indication Media Resource Function Processor reserved media processing resources comprises step:
The media resource function controller sends increases end-points request message to Media Resource Function Processor, wherein carries the end points beared information in this increase end-points request message;
After receiving this increase end-points request message, Media Resource Function Processor sends increases the end points response message to the media resource function controller.
According to this method, Media Resource Function Processor provides response message affirmation carrying and carries out the media resource preparation according to application server, comprises step:
After the media resource function controller receives and increases the end points response message, send provisional response message to application server, after application server received this provisional response message, transmission provided and acknowledges message to the media resource function controller;
After receiving that this provides response message, the media resource function controller sends modify request messages to Media Resource Function Processor, carries the media resource ready message in the wherein said modify request messages;
After Media Resource Function Processor is received this modify request messages, send and revise response message to the media resource function controller;
After the media resource function controller receives this modification response message, send and acknowledge message to application server.
According to this method, Media Resource Function Processor reports media resource to prepare the result and bearing resource is set up the result, comprises step:
Media Resource Function Processor sends and reports request message to the media resource function controller;
After the media resource function controller receives this and reports request message, send to report and acknowledge message to Media Resource Function Processor.
According to this method, described media resource function controller indication Media Resource Function Processor carries out media services, comprises step:
The media resource function controller sends modify request messages to Media Resource Function Processor;
After receiving this modify request messages, Media Resource Function Processor sends to revise and acknowledges message to the media function controller;
Media Resource Function Processor provides media services.
The system of medium resource service is provided under also a kind of IMS network of the present invention, comprise application server, service call business control function body, media resource function controller and Media Resource Function Processor in the described IMS network, wherein, the interface between described media resource function controller and the Media Resource Function Processor is used for supporting the indication media resource to prepare.
Described media resource is prepared to comprise at least: file is looked ahead and/or buffer memory or Text To Speech processing content of text prior notice.
Described media resource prepare to adopt expansion H.248 the mode of bag realize that H.248 this expansion is wrapped to indicate at least and looked ahead and/or the path and the title of buffer memory or prior notice file and report operating result.
H.248, described expansion is wrapped at least and is comprised: attribute, incident, signal, statistical information and rule parameter.
Described signal parameter comprises at least:
Obtain file signal: be used to indicate media resource processing arrangements to obtain the media resource file, and according to operation result uploading;
Cache file signal: be used to indicate media resource processing arrangements to obtain and the buffered media resource file;
Content of announcement signal: be used for the content that the prior notice resource processing arrangements carries out the text-converted voice, and change in advance.
According to this system, described media resource function controller receives the session of application server transmission and sets up request message, indicates the Media Resource Function Processor reserved media processing resources then; Described Media Resource Function Processor provides response message affirmation carrying and carries out the media resource preparation according to application server.
According to this system, described media resource function controller indication Media Resource Function Processor reserved media processing resources is meant: the media resource function controller sends increases end-points request message to Media Resource Function Processor, wherein carries the end points beared information in this increase end-points request message; After receiving this increase end-points request message, Media Resource Function Processor sends increases the end points response message to the media resource function controller.
According to this system, described Media Resource Function Processor provides response message affirmation carrying and carries out the media resource preparation according to application server, is meant:
After the media resource function controller receives and increases the end points response message, send provisional response message to application server, after application server received this provisional response message, transmission provided and acknowledges message to the media resource function controller;
After receiving that this provides response message, the media resource function controller sends modify request messages to Media Resource Function Processor, carries the media resource ready message in the wherein said modify request messages;
After Media Resource Function Processor is received this modify request messages, send and revise response message to the media resource function controller;
After the media resource function controller receives this modification response message, send and acknowledge message to application server.
According to this system, described Media Resource Function Processor reports media resource to prepare the result and bearing resource is set up the result, and wherein, Media Resource Function Processor sends and reports request message to the media resource function controller; After the media resource function controller receives this and reports request message, send to report and acknowledge message to Media Resource Function Processor.
According to this system, described media resource function controller indication Media Resource Function Processor carries out media services, and wherein, the media resource function controller sends modify request messages to Media Resource Function Processor; After receiving this modify request messages, Media Resource Function Processor sends to revise and acknowledges message to the media function controller; Media Resource Function Processor provides media services.
By the present invention, make when the IMS network provides medium resource service to the user, introduce the resource reservation processing during the session between AS～MRFC is set up, thereby improved the reliability of medium resource service;
Provide at network under the situation of media file equiband deficiency, look ahead in advance and improve the quality of medium resource service;
Under the situation of carrying out Text To Speech (TTS:Text To Speech), can indicate the content of playback converting text in advance, the promptness when sending with assurance text-converted rear line.
Description of drawings
Figure 1 shows that the IMS network provides the system configuration schematic diagram of medium resource service;
Fig. 2 is the flow chart of QoS resource reservation;
Fig. 3 is resource bid and use are carried out in session between AS and the MRFC in the existing playback process flow chart;
The flow chart that Fig. 4 sets up for session between AS～MRFC of the present invention;
Fig. 5 is the flow chart that session is set up between AS～MRFC in the playback process of the embodiment of the invention.
Embodiment
The present invention is described in detail with reference to the accompanying drawings.
The invention provides the method and system that medium resource service is provided under a kind of IMS network.
This system comprises application server AS, service call service control function (S-CSCF) entity, media resource function controller MRFC and Media Resource Function Processor MRFP, wherein, interface between described MRFC and the MRFP is used for supporting the indication media resource to prepare, make when the IMS network provides medium resource service, make by this interface and adopt the resource reservation mode to set up session between application server AS and the MRFC.
In this system, MRFC receives the session of AS transmission and sets up request message, indicates the MRFP reserved media processing resources then; Described MRFP provides response message to confirm carrying according to AS and carries out the media resource preparation.Wherein,
MRFC indication MRFP reserved media processing resources is meant: MRFC sends increases end-points request message to MRFP, wherein carries the end points beared information in this increase end-points request message; After receiving this increase end-points request message, MRFP sends increases the end points response message to MRFC.
Described MRFP confirms carrying and carries out media resource and prepare according to the response message that provides of AS, is meant: after MRFC receives and increases the end points response message, send provisional response message to AS, after AS receives this provisional response message, send to provide and acknowledge message to MRFC;
After receiving that this provides response message, MRFC sends modify request messages to MRFP, carries the media resource ready message in the wherein said modify request messages;
After MRFP receives this modify request messages, send and revise response message to MRFC;
After MRFC receives this modification response message, send and acknowledge message to AS.
Described MRFP can report media resource to prepare the result and bearing resource is set up the result, and wherein, MRFP sends and reports request message to MRFC; After MRFC receives this and reports request message, send to report and acknowledge message to MRFP.
MRFC indication MRFP carries out media services, and wherein, MRFC sends modify request messages to MRFP; After receiving this modify request messages, MRFP sends to revise and acknowledges message to MRFC; MRFP provides media services.
This method is: be provided with application server AS, service call service control function (S-CSCF) entity, media resource function controller MRFC and Media Resource Function Processor MRFP in the IMS network, wherein, interface between described MRFC and the MRFP is used for supporting the indication media resource to prepare, when the IMS network provides medium resource service, make between application server AS and the MRFC by this interface and to adopt the resource reservation mode to set up session.
Above-mentioned media resource is prepared to comprise at least: file is looked ahead and/or buffer memory or Text To Speech TTS processing content of text prior notice.
Described media resource prepare to adopt expansion H.248 the mode of bag realize that H.248 this expansion is wrapped to indicate at least and looked ahead and/or the path and the title of buffer memory or prior notice file and report operating result.
H.248, described expansion is wrapped at least and is comprised: attribute, incident, signal, statistical information and rule parameter.
Wherein, described signal parameter comprises at least:
Obtain file signal: be used to indicate media resource processing arrangements to obtain the media resource file, and according to operation result uploading;
Cache file signal: be used to indicate media resource processing arrangements to obtain and the buffered media resource file;
Content of announcement signal: be used for the content that the prior notice resource processing arrangements carries out the text-converted voice, and change in advance.
In the present embodiment, H.248 this expansion wraps as follows:
Package Name (bag title): media resource is prepared bag (Media Resource Prepare)
PackageID (bag sign): mrp (0x?)
Description (explanation): use this to wrap and prepare media resource
Version (version): 1
Properties (attribute)
Do not have.
Events (incident):
1) preparation failure (preparing failure)
Event name (incident title): preparation failure (preparing failure)
EventID (event identifier): fail (0x?)
Description (explanation): resource is prepared failure
EventDescriptor parameters (event description parameter):
Do not have
ObservedEventDescriptor parameters (observed event characterising parameter):
Parameter Name (parameter name): Return Code (return code)
Parameter ID (parameter identification): rc (0x?)
Description (explanation): the reason of expression failure.
The definition return code is as follows:
The 0x01-resource does not exist
The 0x02-resource can't obtain
0x03-bandwidth deficiency
0x04-other
Type (type): integer
Optional ：No
2) Preparation Success (operating successfully)
Event name (incident title): Preparation Success (operating successfully)
EventID (event identifier): suc (0x?)
Description (explanation): operate successfully.
EventDescriptor parameters (event description parameter):
Do not have
ObservedEventDescriptor parameters (observed event characterising parameter):
Parameter ID (parameter identification): res (0x?)
Description (explanation): operating result
Type (type): enum (enumerating)
Possible value (possible value):
" normal " (0): normal.
Signals (signal):
1) signal get
Signal name (signal name): get (obtaining file)
SignalID (signal identification): get (0x?)
Description (description): obtain file to local
SignalType (signal type): default value BR (sending this action carries out up to finishing).
Parameter name (parameter name) obtains file identification
Parameter Name (parameter name): file name (obtaining file identification)
ParameterID (parameter identification): fn (0x?)
Description (description): this parameter is used for document location and the literary composition that description document is deposited
The part name, parameter format can be following three kinds of forms:
But the file of this locality direct access I. is as filename.3gp.
II. pass through
File: the file of // mode access,
As file: //huawei/filename.3gp
III. pass through
Http: the file of // mode access,
As
Http:// huawei/filename.3gp
Type (type): String (character string)
Optional (whether optional): not
Possible values (probable value): file identification
Default (whether default value is arranged): do not have
2) signal cache
Signal name (signal name): cache (cache file)
SignalID (signal identification): cache (0x?)
Description (description): local to arriving file cache
SignalType (signal type): default value BR (sending this action carries out up to finishing).
Parameter name (parameter name) cache file sign
Parameter Name (parameter name): file name (cache file sign)
ParameterID (parameter identification): fn (0x?)
Description (description): this parameter is used for document location and the literary composition that description document is deposited
The part name, parameter format can be following three kinds of forms:
But the file of this locality direct access I. is as filename.3gp.
II. pass through
File: the file of // mode access,
As file: //huawei/filename.3gp
III. pass through
Http: the file of // mode access,
As
Http:// huawei/filename.3gp
Type (type): String (character string)
Optional (whether optional): not
Possible values (probable value): file identification
Default (whether default value is arranged): do not have
Parameter name (parameter name) cache file sign
Parameter Name (parameter name): size (cache size)
ParameterID (parameter identification): size (0x?)
Description (description): this parameter is used for
The size of buffer memory is described, the unit byte
Type (type): int (integer)
Optional (whether optional): not
Possible values (probable value):＞0
Default (whether default value is arranged): do not have
3) signal Notify
Signal name (signal name): Notify (content of announcement)
SignalID (signal identification): not (0x?)
Description (description): the content of notification text converting speech
SignalType (signal type): default value BR (sending this action carries out up to finishing).
Parameter name (parameter name) cache file sign or character string
Parameter Name (parameter name): content (cache file sign)
ParameterID (parameter identification): con (0x?)
Description (description): this parameter be used for document location that description document deposits or
Content of text, parameter format can be following several forms:
But the file of this locality direct access I. is as Loc:filename.txt.
II. pass through
File: the file of // mode access,
As file: //huawei/filename.txt
III. pass through
Http: the file of // mode access,
As
Http:// huawei/filename.Txt
IV. content of text, as: CON:how are you
Type (type): String (character string)
Optional (whether optional): not
Possible values (probable value): file identification
Default (whether default value is arranged): do not have
Statistics (statistical information): do not have.
Procedures (rules):
Media resource controlling device can indicate media resource processing arrangements to obtain the media resource file by the get signal, and according to operation result uploading; Can obtain and the buffered media resource file by the indexed resource treatment facility by the cache signal; By the notify signal, the existing content of carrying out the text-converted voice of prior notice resource processing arrangements, and change in advance.
When the IMS network provides medium resource service, adopt the resource reservation mode to set up session between application server AS and the media resource function controller MRFC.
In setting up the passage process, introduce the resource reservation mode, provide and reply the reservation that ensures encoding and decoding by SDP.During UE QoS such as carry out that passage is opened set up, media resource processing arrangements was also finished corresponding QoS process, comprising the assurance of media resource preparatory function (file looks ahead/caching function, TTS handle the content of text prior notice), carrying bandwidth.
Be illustrated in figure 4 as between AS～MRFC of the present invention session and set up schematic flow sheet.As shown in the figure, set up session between application server AS and the media resource function controller MRFC, comprise step:
After the S-CSCF entity is received user's the session request of setting up, after judging according to user's initial filter criteria iFC, send session to application server AS and set up request message;
After application server AS receives that request message is set up in this session, trigger medium resource service according to service logic.
Wherein, application server AS will adopt back-to-back user agent (B2BUA: pattern Back-to-Back UserAgent), between UE～AS and AS～MRFC, set up the SIP session respectively.When triggering medium resource service, AS to corresponding M RFC initiation session, can determine the type of the resource of needs according to the COS decision simultaneously.As application playback when service, can know the filename of playback and path etc.
Wherein, the session between UE～AS is set up and can be carried out according to prior art, repeats no more herein.
SDP negotiation is carried out with the resource reservation mode between AS～MRFC in step 2～13, and MRFP carries out resource reservation by the indication of message H.248, sets up and the preparation of media resource.Step is as follows:
AS sends session to the S-CSCF entity and sets up request (Invite) message (seeing step 2), sends this Invite message then and (sees step 3) to corresponding M RFC;
After MRFC receives this Invite message, does sending increase end-points request (AddReq (Context ID=? Termination ID=? )) message (sees step 4) to MRFP, wherein, carrying parameter in this AddReq message is the end points beared information, be set to TRUE by reservation being organized (reservegroup), reserved value (reserve value) in the AddReq message in the present embodiment, come to reserve the encoding and decoding resource for passage according to the encoding and decoding tabulation;
After MRFP receives this AddReq message, send to increase end points response AddResp (Context ID=C1, Termination ID=T1) message and (see step 5) to MRFC;
After MRFC receives AddResp message, send provisional response (183 Session Progress) message to AS, after AS receives this 183 Session Progress message, send to provide and reply (PRACK) message S-CSCF, and then be sent to MRFC (seeing step 6～9);
After MRFC receives this PRACK message, MRFC send to revise request (ModReq (Context ID=C1, Termination ID=T1)) message to MRFP (see step 10),
After MRFP received this ModReq message, (ModResp (Context ID=C1, Termination ID=T1) (saw step 11) to MRFC send to revise response message;
After MRFC receives this ModResp message, send and reply (200OK) message to application server AS (seeing step 12～13).
Wherein, in this ModReq message,, indicate MRFP to obtain the media services file in advance by carrying the file signal mrp/get that looks ahead (i.e. Kuo Zhan H.248 bag); Perhaps, indicate the MRFP buffer memory to be about to the media file that uses by cache file signal mrp/cache; Perhaps adopt content of announcement signal mrp/not, indicate MRFP to notify the content of text that is about to conversion.
In this process, UE will insert the foundation of side carrying, be General Packet Radio System (GPRS:General Packet Radio system) network as what adopt, will carry out the operations such as activation of passage.
MRFP carries out the preparation of network carrying resource and the preparation of media services content resource.As obtain the buffer memory network file.
MRFP sends and reports request (NotReq (Context ID=C1, Termination ID=T1)) message to MRFC (seeing step 19);
After MRFC receives this NotReq message, send to report and reply (NotResp (Context ID=C1, Termination ID=T1)) message to MRFP (seeing step 20).
Wherein, MRFP prepares bag according to the media resource preparation by media resource, i.e. the result that preparation result event during H.248 expansion wraps reports resource to prepare.
AS sends response message (ACK) to S-CSCF entity (seeing step 23); The S-CSCF entity sends this ACK message to MRFC (seeing step 24).
MRFC sends and revises request (ModReq (Context ID=C1, Termination ID=T1)) message to MRFP (seeing step 25); After MRFP received this ModReq message, MRFP sent to revise and replys (ModResp (Context ID=C1, Termination ID=T1)) message to MRFC (seeing step 26).
As shown in Figure 5, be that example describes session foundation between AS～MRFC of the present invention with the playback process.As shown in the figure, the related entities of having omitted the UE side and having transmitted the UE sip message; [1] [2] represent session between UE～AS and the session between AS～MRFC respectively; SDP_1, SDP_2, SDP_3, SDP_4 represent the several SDP in the negotiations process respectively.
As shown in the figure, step 1～3, UE sends session and sets up request (Invite) message to S-CSCF, receives regular inspection of the laggard industry affair of this Invite message at S-CSCF, triggers the playback business, and by Invite message business is forwarded on the AS;
The negotiation of QoS has been finished in step 24～33 (removing step 27,28), and expression UE and MRFP have possessed the condition that QoS guarantees.
(ACK[2]) message is confirmed in step 40～41, the session that AS sends to MRFP, represents that by these two pairs of message session sets up successfully, and indicates MRFC to carry out playback;
From the above, by the reserved resource and the playback file of looking ahead, can guarantee after the user sends affirmation (ACK) message, can finish the process of playback.
The foregoing description only is used to illustrate the present invention, but not is used to limit the present invention.
Claims (22)
1. the method for medium resource service is provided under the IMS network, be provided with application server, service call business control function body, media resource function controller and Media Resource Function Processor in the described IMS network, it is characterized in that, between described media resource function controller and the Media Resource Function Processor interface is set, be used for supporting the indication media resource to prepare, when the IMS network provides medium resource service, set up session between application server and the media resource function controller, comprise step:
Application server triggers medium resource service;
Hold consultation with the resource reservation mode between application server and the media resource function controller;
Subscriber equipment carries out service quality foundation, Media Resource Function Processor carries out media resource and bearing resource is prepared.
2. the method for medium resource service is provided under the IMS network according to claim 1, it is characterized in that, described media resource is prepared to comprise at least: file is looked ahead and/or the prior notice of the content of text of buffer memory or text-converted speech processes.
3. the method for medium resource service is provided under the IMS network according to claim 1, it is characterized in that, described media resource prepare to adopt expansion H.248 the mode of bag realize that H.248 this expansion is wrapped to indicate at least and looked ahead and/or the path and the title of buffer memory or prior notice file and report operating result.
4. the method for medium resource service is provided under the IMS network according to claim 3, it is characterized in that, H.248 described expansion is wrapped at least and is comprised: attribute, incident, signal, statistical information and rule parameter.
5. the method for medium resource service is provided under the IMS network according to claim 4, it is characterized in that, described signal parameter comprises at least:
Obtain file signal: be used to indicate media resource processing arrangements to obtain the media resource file, and according to operation result uploading;
Cache file signal: be used to indicate media resource processing arrangements to obtain and the buffered media resource file;
Content of announcement signal: be used for the content that the prior notice resource processing arrangements carries out the text-converted voice, and change in advance.
6. the method for medium resource service is provided under the IMS network according to claim 1, it is characterized in that, also comprise step:
Mutual resource preparation between application server and the media resource function controller, and Media Resource Function Processor reports media resource to prepare the result and bearing resource is set up the result;
Application server indicates described media resource function controller to provide service for the user;
Described media resource function controller indication Media Resource Function Processor carries out media services.
7. the method for medium resource service is provided under the IMS network according to claim 1, it is characterized in that, application server triggers medium resource service, comprises step:
After described service call session control function entity is received user's the session request of setting up, after judging according to user's initial filter criteria, send session to application server and set up request message;
After application server receives that request message is set up in this session, trigger medium resource service according to service logic.
8. the method for medium resource service is provided under the IMS network according to claim 1, it is characterized in that, carry out conversation description protocol negotiation with the resource reservation mode between application server and the media resource function controller, comprise step:
Application server sends session to the service call business control function body and sets up request message, sends this session then and sets up request message to corresponding media resource function controller;
After the media resource function controller receives that request message is set up in this session, indication Media Resource Function Processor reserved media processing resources;
Described Media Resource Function Processor provides response message affirmation carrying and carries out the media resource preparation according to application server.
9. the method for medium resource service is provided under the IMS network according to claim 8, it is characterized in that, media resource function controller indication Media Resource Function Processor reserved media processing resources comprises step:
The media resource function controller sends increases end-points request message to Media Resource Function Processor, wherein carries the end points beared information in this increase end-points request message;
After receiving this increase end-points request message, Media Resource Function Processor sends increases the end points response message to the media resource function controller.
10. the method for medium resource service is provided under the IMS network according to claim 9, it is characterized in that, Media Resource Function Processor provides response message affirmation carrying and carries out the media resource preparation according to application server, comprises step:
After the media resource function controller receives and increases the end points response message, send provisional response message to application server, after application server received this provisional response message, transmission provided and acknowledges message to the media resource function controller;
After receiving that this provides response message, the media resource function controller sends modify request messages to Media Resource Function Processor, carries the media resource ready message in the wherein said modify request messages;
After Media Resource Function Processor is received this modify request messages, send and revise response message to the media resource function controller;
After the media resource function controller receives this modification response message, send and acknowledge message to application server.
11. the method for medium resource service is provided under the IMS network according to claim 6, it is characterized in that Media Resource Function Processor reports media resource to prepare the result and bearing resource is set up the result, comprises step:
Media Resource Function Processor sends and reports request message to the media resource function controller;
After the media resource function controller receives this and reports request message, send to report and acknowledge message to Media Resource Function Processor.
12. the method for medium resource service is provided under the IMS network according to claim 6, it is characterized in that described media resource function controller indication Media Resource Function Processor carries out media services, comprises step:
The media resource function controller sends modify request messages to Media Resource Function Processor;
After receiving this modify request messages, Media Resource Function Processor sends to revise and acknowledges message to the media function controller;
Media Resource Function Processor provides media services.
13. the system of medium resource service is provided under the IMS network, comprise application server, service call business control function body, media resource function controller and Media Resource Function Processor in the described IMS network, it is characterized in that the interface between described media resource function controller and the Media Resource Function Processor is used for supporting the indication media resource to prepare.
14. the system of medium resource service is provided under the IMS network according to claim 13, it is characterized in that described media resource is prepared to comprise at least: file is looked ahead and/or buffer memory or Text To Speech processing content of text prior notice.
15. the system of medium resource service is provided under the IMS network according to claim 13, it is characterized in that, described media resource prepare to adopt expansion H.248 the mode of bag realize that H.248 this expansion is wrapped to indicate at least and looked ahead and/or the path and the title of buffer memory or prior notice file and report operating result.
16. the system of medium resource service is provided under the IMS network according to claim 14, it is characterized in that H.248 described expansion is wrapped at least and comprised: attribute, incident, signal, statistical information and rule parameter.
17. the system of medium resource service is provided under the IMS network according to claim 16, it is characterized in that described signal parameter comprises at least:
Obtain file signal: be used to indicate media resource processing arrangements to obtain the media resource file, and according to operation result uploading;
Cache file signal: be used to indicate media resource processing arrangements to obtain and the buffered media resource file;
Content of announcement signal: be used for the content that the prior notice resource processing arrangements carries out the text-converted voice, and change in advance.
18. the system of medium resource service is provided under the IMS network according to claim 13, it is characterized in that, described media resource function controller receives the session of application server transmission and sets up request message, indicates the Media Resource Function Processor reserved media processing resources then; Described Media Resource Function Processor provides response message affirmation carrying and carries out the media resource preparation according to application server.
19. the system of medium resource service is provided under the IMS network according to claim 18, it is characterized in that, described media resource function controller indication Media Resource Function Processor reserved media processing resources is meant: the media resource function controller sends increases end-points request message to Media Resource Function Processor, wherein carries the end points beared information in this increase end-points request message; After receiving this increase end-points request message, Media Resource Function Processor sends increases the end points response message to the media resource function controller.
20. the system of medium resource service is provided under the IMS network according to claim 19, it is characterized in that described Media Resource Function Processor provides response message affirmation carrying and carries out the media resource preparation according to application server, is meant:
After the media resource function controller receives and increases the end points response message, send provisional response message to application server, after application server received this provisional response message, transmission provided and acknowledges message to the media resource function controller;
After receiving that this provides response message, the media resource function controller sends modify request messages to Media Resource Function Processor, carries the media resource ready message in the wherein said modify request messages;
After Media Resource Function Processor is received this modify request messages, send and revise response message to the media resource function controller;
After the media resource function controller receives this modification response message, send and acknowledge message to application server.
21. the system of medium resource service is provided under the IMS network according to claim 13, it is characterized in that, described Media Resource Function Processor reports media resource to prepare the result and bearing resource is set up the result, wherein, Media Resource Function Processor sends and reports request message to the media resource function controller; After the media resource function controller receives this and reports request message, send to report and acknowledge message to Media Resource Function Processor.
22. the system of medium resource service is provided under the IMS network according to claim 13, it is characterized in that, described media resource function controller indication Media Resource Function Processor carries out media services, wherein, the media resource function controller sends modify request messages to Media Resource Function Processor; After receiving this modify request messages, Media Resource Function Processor sends to revise and acknowledges message to the media function controller; Media Resource Function Processor provides media services.
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| CNA2006100775778A CN101064863A (en) | 2006-04-27 | 2006-04-27 | Method and system for providing media resource service in IMS network |
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| CN111404862A (en) * | 2019-01-02 | 2020-07-10 | 中国移动通信有限公司研究院 | Multimedia processing method and equipment |
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| CN113132422A (en) * | 2019-12-30 | 2021-07-16 | 大唐高鸿数据网络技术股份有限公司 | Remote driving service planning method and device, AS and SCEF unit |
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