CN100531216C - Method and device for controlling medium resource - Google Patents
Method and device for controlling medium resource Download PDFInfo
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- CN100531216C CN100531216C CNB2006100648429A CN200610064842A CN100531216C CN 100531216 C CN100531216 C CN 100531216C CN B2006100648429 A CNB2006100648429 A CN B2006100648429A CN 200610064842 A CN200610064842 A CN 200610064842A CN 100531216 C CN100531216 C CN 100531216C
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Abstract
The present invention relates to media resources control method and device. Said method includes A, obtaining universal resource identifier field or message body field in session initiation agreement message; B, if said universal resource identifier field or message body field embedded media resources control protocol, then according to said media resources control protocol operation to make control to conversation connected relevant media resources. Said device includes obtaining used for obtaining universal resource identifier field or message body field information in session initiation agreement; media resources control unit used for according to media resources control operation in said universal resource identifier field or message body field information to make relevant resource control to conversation connection. The present invention solves problem of unable to make effective control to current media resources in current technology, thereby service complexity and effective controlling media resources utilization ratio.
Description
Technical field
The present invention relates to the resource control technology of the communications field, particularly relate to a kind of control method and device of media resource.
Background technology
At next generation network (NGN, Next Generation Network) under the system, Media Resource Server (MRS, Media Resource Server) mainly uses MGCP/session initiation protocol (MGCP/SIP, Media Gateway Control Protocol/Session Initiation Protocol) provides media resource for soft switch or application server, realize playback, collect the digits, functions such as recording, meeting and video playback.
Wherein, described session initiation protocol (SIP, Session Initiation Protocol) is an application layer control protocol that on IP network, carries out multimedia communication that proposes and preside over research by IETF, the session process that it is used to create, revise and one or more participants that terminate participate in.And described Session Initiation Protocol is with respect to the MGCP agreement, implements more flexibly, can freely expand, and still, described Session Initiation Protocol only provides call establishment, deletion and modify feature, for how controlling media resource is not described.
Generally, utilize the sip invite message that has conversation description to create session, so that the participant can carry out media type negotiations alternately by SIP.SIP adopts client/server (Client/Server), HTTP model, request and response to constitute affairs, and is separate between the affairs.Each request all can trigger the operation of server.A complete call flow comprises a plurality of affairs, as: call setup (INVITE), revise call property (re-INVITE), issue operation (INFO), terminated call (BYE) etc.
Described SIP does not stipulate how to indicate the operation of a session, as: playback, collect the digits, recording etc., and sip message can carry the message body of any type, so we can embed another kind of agreement in the sip message body, so that operations such as indication MRS carries out playback, collects the digits, recording.
At present, embedding grammar commonly used has two kinds: a kind of is earlier Intelligent Network Application Protocol (INAP, Intelligent Network Application Protocol) agreement to be transformed; Then, improved Intelligent Network Application Protocol Intelligent Network Application Protocol is embedded in the Session Initiation Protocol, promptly is embedded in the message body field of Session Initiation Protocol; At last, carry out related resolution by the INAP standard again, think that media resource control and intelligent value-added service control are used.That is to say, earlier the partial parameters that is used for media resource control in the Intelligent Network Application Protocol is extracted, then through after some simple transformations, such as the parameter that is not suitable for NGN is removed, the newly-increased parameter that NGN is needed adds, then improved Intelligent Network Application Protocol is embedded among the Body of sip message, after MRS receives this sip message, Body is extracted, resolve according to the Intelligent Network Application Protocol standard again.
In the method, because Intelligent Network Application Protocol is to be public switch telephone network (PSTN specially, PublicSwitch Telcom Network) agreement that is customized, its development unusual maturation with complicated, through facts have proved, this improved Intelligent Network Application Protocol can not well use with the control of the media resource of MRS in, realize that effect is unsatisfactory.Such as, because Intelligent Network Application Protocol is at PSTN net, not fine for the support of broadband network, a lot of parameters need be carried out corresponding modify etc. at broadband network.
Another kind of embedding grammar is, a kind of proprietary protocol of special configuration, and it is embedded in the message Body field of Session Initiation Protocol, be used for the media resource control of soft switch or application server to MRS.Wherein, a kind of proprietary protocol of described structure, just with the various control types of media resource, as playback, collect the digits, recording etc., express with privately owned mode, promptly equal to re-construct a kind of agreement.Be embedded into the control of carrying out media resource in the Body field of sip message then.
Described method is because what use is proprietary protocol, and its versatility is bad, and described Session Initiation Protocol is text protocol, and the proprietary protocol of structure also can only be a text protocol, and this is to parsing of agreement difficulty relatively, thereby can not utilize the prior protocols resource fully.
Above-mentioned thus disclosed embedding grammar as can be known, Session Initiation Protocol has only been stipulated how to set up, has been deleted a session, how regulation does not indicate the operation of a session.That is to say that the session initiation protocol after embedding some agreement though can indicate MRS to carry out playback, collect the digits and operation such as recording, all can not make full use of existing protocol and effectively control having media resource now.
Summary of the invention
The technical problem that the present invention solves provides a kind of control method and device of media resource, can not be to having the problem that media resource control effectively now in the present technology to solve.
For addressing the above problem, the invention provides a kind of control method of media resource, described method comprises step:
A, Media Resource Server obtain universal resource identifier field or the message body field in the session initiation protocol message;
B, if embedding media resource control protocol message in described universal resource identifier field or the message body field then the respective media resource of session connection is controlled according to the operation of described media resource control protocol message.
Steps A specific implementation process is:
A1: Media Resource Server receives the session initiation protocol message;
A2:, obtain universal resource identifier URI field or message body field in this message by resolving described session initiation protocol message.
Described media resource control protocol message comprises: the basic voice packet in the MGCP and/or the protocol massages of extended voice bag.
The form of described embedding media resource control protocol is: the medium attended operation. protocol type. and action type, wherein each field uses ". " to separate.
The form of described embedding media resource control protocol message is specially:
Annc|conf.BAU|AAU.pa|pc|pr (" BAU " message | " AAU " message)
Wherein, described " | " expression or relation, each field uses ". " to separate; Described annc|conf represents that a certain connection or meeting operate; Described BAU|AAU represents that subsequent packet uses basic voice packet or extended voice bag to resolve; Described pa|pc|pr represents playback or collects the digits or recording operation; Described (" BAU " message | " AAU " message) basic voice packet of expression or extended voice bag request message content.
The specific implementation process of described step B is:
Media Resource Server is judged in described universal resource identifier field or the message body field the basic voice packet in the embedding media resource control protocol message whether or the protocol massages of extended voice bag; If then call the packet parsing function of this basic voice packet or extended voice bag it resolved accordingly, and the respective media resource of session connection is controlled according to analysis result; Otherwise, call other function the respective media resource of session connection controlled.
In addition, the present invention also provides a kind of control device of media resource, and described device comprises:
Acquiring unit is used for obtaining the universal resource identifier field or the message body field information of session initiation protocol;
The media resource control unit, when being used for the universal resource identifier field that gets access at described acquiring unit or message body field embedding media resource control protocol message, the respective media resource of session connection is controlled according to the operation of described media resource control protocol message.
Described acquiring unit comprises:
Message receives subelement, is used to receive the session initiation protocol message;
The packet parsing subelement receives subelement with message and links to each other, and is used to resolve the session initiation protocol message of reception, obtains universal resource identifier field or message body field information in this message.
Described media resource control unit comprises:
Judgment sub-unit links to each other with the packet parsing subelement, is used for judging whether embedding media resource control protocol message of received universal resource identifier field or message body field information;
Call subelement, link to each other, according to the corresponding packet parsing function of the operation calls of media resource control protocol with judgment sub-unit;
Resolve subelement, and call subelement and link to each other, be used to resolve corresponding media resource control operation;
Control sub unit links to each other with the parsing subelement, according to analysis result the respective media resource of session connection is controlled.
Described media resource control protocol message comprises: the basic voice packet in the MGCP and/or the protocol massages of extended voice bag.
Compared with prior art, the present invention has following beneficial effect: the present invention utilizes basic voice packet BAU and the extended voice bag AAU (but being not limited to this two kinds of media resource control operations) among the existing MGCP MGCP, and it is embedded in the SIP (Session Initiation Protocol) message, Media Resource Server MRS carries out the media resource control operation to session connection in order to indication, as: playback, collect the digits, recording, video playback etc.This expansion to the increase of follow-up new business or old service is very convenient, only needs to increase or revise professional control flow in the control appliance side to get final product.In addition,, just can finish whole call flow, realize the processing of multiple business as long as described BAU, AAU are embedded in the Session Initiation Protocol.Because MRS supports the MGCP/SIP agreement basically, so to the parsing of the agreement of described BAU, AAU, the relative program module of directly calling the MGCP protocol stack get final product, its complexity is not high, easily realization.In addition, described BAU, AAU are existing ripe agreements, and versatility is good.
Description of drawings
Fig. 1 is the flow chart of the control method of media resource of the present invention;
Fig. 2 is an embodiment of the control method of media resource of the present invention;
Fig. 3 is an application example of the control method of media resource of the present invention;
Fig. 4 is the structural representation of the control device of media resource of the present invention.
Embodiment
Core of the present invention is expansion session initiation protocol (SIP, Session Initiation Protocol), and embedding media resource control operation in described SIP message, such as, existing MGCP (MGCP, Media Gateway Control Protocol) basic voice packet (BAU, Basic AudioPackage), extended voice bag (AAU, Advanced Audio Package) message specification, carry out playback in order to indication Media Resource Server (MRS, Media Resource Server), collect the digits, recording, the controlled function of media resources such as video playback.
The present invention is described further below in conjunction with accompanying drawing.
See also Fig. 1, be the flow chart of the control method of media resource of the present invention.Described method comprises step:
Step M11: obtain universal resource identifier field or message body field in the session initiation protocol message;
Step M12: if embedding media resource control protocol in described universal resource identifier field or the message body field is then controlled the respective media resource of session connection according to the operation of described media resource control protocol.
Wherein, outside basic voice packet BAU in not only can embedding media gateway control protocol MGCP in described SIP (Session Initiation Protocol) message and the protocol massages of extended voice bag AAU, also can embed other agreement that can realize media resource control or the message of user-defined format, in order to realize identical functions.
For convenience of description, the media resource control protocol of the following stated is that example illustrates with the protocol massages of basic voice packet BAU and extended voice bag AAU, specifically please refer to Fig. 2, comprises step:
Step S11: Media Resource Server receives the session initiation protocol message;
Step S12:, obtain universal resource identifier field or message body field in this message by resolving described session initiation protocol message;
Step S13: judge in described universal resource identifier field or the message body field the basic voice packet in the embedding media resource control protocol whether or the protocol massages of extended voice bag;
Step S14: if then call the packet parsing function of this basic voice packet or extended voice bag it is resolved accordingly, and the respective media resource of session connection is controlled according to analysis result;
Step S15: if not, call other function the respective media resource of session connection is controlled.
Before describing the present invention, introduce following noun earlier:
Media Resource Server (MRS, Media Resource Server): described media server is the assembly that the medium value-added service is provided in the IP network, handles service for next generation network provides more valuable media data.Such as, business such as playback collects the digits, phonetic synthesis, speech recognition, recording, fax are provided in session connection.In addition, described media server is under the control of control appliance (such as Softswitch, application server etc.), provide on the IP network and to realize the required specialized resource function of miscellaneous service, it has resource control function, the function that communicates with other entities and the management that resource itself is provided, maintenance function etc.
Universal resource identifier (URI, Universal Resource Identifier), described URI available every kind of resource (such as html document, image, video segment, program etc.) on Web is all positioned by a generic resource identifier URI.Described URI generally comprises three parts: the title of the naming mechanism of access resources, the host name of depositing resource and resource self, and by path representation.
The present invention mainly is the expansion Session Initiation Protocol, and embeds " BAU ", " AAU " message specification of MGCP agreement in the Session Initiation Protocol message, in order to indication MRS carry out playback, collect the digits, operations such as media resource controlled function such as recording, video playback.That is to say, the present invention utilizes the message that embeds basic voice packet BAU, extended voice bag AAU in the message body of the request universal resource identifier (URI) of call setup in the Session Initiation Protocol (INVITE) order, the request URI that revises call property (reINVITE) order, the message body that issues operation (INFO) order or INFO command response, media resource controlled function such as Media Resource Server MRS carries out playback, collects the digits to indicate, recording, video playback.
In the request URI field of the request URI of described INVITE message field, reINVITE message, INFO message message body, INFO response message message body, the form that embeds " BAU " or " AAU " message is as follows:
Annc|conf.BAU|AAU.pa|pc|pr (" BAU " message | " AAU " message)
Wherein " | " expression or relation, each field uses ". " to separate.
In described annc|conf, annc represents a certain connection is operated; Conf represents a certain meeting (being a plurality of connections) is operated;
In described BAU|AAU, BAU represents that subsequent packet uses " BAU " standard to resolve; AAU represents that subsequent packet uses " AAU " standard to resolve.But the present invention can also support other media resource control protocol except disclosed " BAU ", " AAU " standard, promptly can expand this field.
In described pa|pc|pr, pa represents that described operation is a playback operation; Pc represents that described operation is the operation that collects the digits; Pr represents that described operation is recording operation.Certainly, if MRS has what's new, as speech recognition, fax etc., this field also can be expanded, so that MRS is to the control of media resource.
In described (" BAU " message | " AAU " message), the content in the bracket is exactly concrete " BAU " or " AAU " request message content.
Therefore, scheme of the present invention is: when Media Resource Server MRS receives the Session Initiation Protocol message, resolve described Session Initiation Protocol message earlier, obtain universal resource identifier URI field or message body field in this message; And then judge in the described URI field basic voice packet " BAU " or extended voice bag " AAU " message in the embedding media resource control protocol whether.That is: medium attended operation. protocol type. action type, wherein each field uses ". " to separate.Concrete deterministic process is: judge whether to have embedded " BAU " or " AAU " message by annc|conf.BAU|AAU.pa|pc|pr is resolved, if meet above-mentioned rule, then think to have embedded " BAU " or " AAU message " in the described URI field; If embed basic voice packet " BAU " or extended voice bag " AAU " message in the described URI field, then call the packet parsing function of this basic voice packet " BAU " or extended voice bag " AAU " it resolved accordingly, and according to analysis result to control respective media resource; If not, calling other function controls the respective media resource of session connection.
For the ease of those skilled in the art's the understanding of the present invention, illustrate with a concrete application example below, as shown in Figure 3.
When Media Resource Server MRS receives call setup INVITE of control appliance (such as soft switch or application server) transmission, can create a connection, and after the establishment successful connection, whether the request URI that MRS detects described INVITE has carried the media resource control operation, if carried the media resource control operation among the request URI, if request URI is (collect the digits with playback and be operating as example):
annc.BAU.pc(ip＝file://welcome1?dm＝x)
Represent that then MRS detects this URI and has playback to this newly-built connection operational order that collects the digits, what use is basic voice packet BAU standard, described BAU content of message is (ip=file: //welcome1 dm=x), MRS calls BAU packet parsing function, described BAU message is resolved, and the content that parses is: the playback filename is welcome1, the template that collects the digits is x, a number is only received in expression, and described number is represented the digit collecting rule of MRS, as long as terminal is imported any one number, MRS just reports the result that collects the digits.
Described MRS will carry out media resource control operation (collecting the digits with playback is example) to this connection according to the parameter that parses.In the figure, described 100,180 and 200 expression answer codes, ACK represents response message.Wherein 100 is Trying, the 180th, and Alerting, the 200th, OK, in different media manipulations, its connotation is all identical.Following identical, repeat no more.
When MRS receives that (this number is the number that the user imports for the number of terminal input, such as: 0～9, *, # etc.) after, MRS can send INFO to control appliance (soft switch or application server) and report operating result, described control appliance is after receiving the INFO that MRS sends, can be by carrying operational order next time in the response of replying, perhaps in this response not ribbon gymnastics instruct, control appliance issues INFO again and indicates MRS to carry out next step operation.Suppose that the media resource control operation that embeds in INFO response that control appliance is replied or the INFO message that sends is:
annc.AAU.pa(an＝file://welcome2？lang＝chi&gender＝female)
Represent that then MRS extracts this section operational order from INFO response or INFO message, and use the standard of AAU to resolve, the content that parses comprises: use Chinese female voice to play these voice of welcome2, MRS will carry out playback operation according to the parameter that parses to this connection then.
In like manner, when MRS after the terminal playback is finished, can send INFO to control appliance (soft switch or application server) and report operating result, described control appliance sends answer code 200 to MRS after receiving the INFO that MRS sends, expression OK, and transmission terminated call (BYE), after MRS receives terminated call (BYE), also send answer code 200 to control appliance, and finish a complete call flow.
The present invention is except using INFO or INFO response message, control appliance can also embed " BAU " in the URI of re-INVITE message, " AAU " playback collects the digits, and bag is next further operates indication to connecting downward message, the form of its embedding is identical with the INVITE message, specifically see for details above-mentionedly, do not repeat them here.
The MRS SIP message that just can issue according to control appliance like this, to connection carry out playback, collect the digits, medium control operation such as recording, video playback, various protocols is embedded in the SIP message, just can finishes one or more complete call flows by SIP message mutual.
In addition, the present invention also provides a kind of control device of media resource, and the structural representation of described device sees Fig. 4 for details.Described device comprises: acquiring unit 11 and media resource control unit 12.Wherein said acquiring unit 11 is used for obtaining the universal resource identifier URI field or the message body field information of session initiation protocol; Media resource control unit 12 is used for according to the media resource control operation of described universal resource identifier URI field or message body field information resource control being carried out in session connection.
Described acquiring unit 11 comprises again: message receives subelement 111 and packet parsing subelement 112, and wherein said message receives subelement 111, is used to receive the session initiation protocol message; Described packet parsing subelement 112 receives subelement 111 with message and links to each other, and is used to resolve the session initiation protocol message of reception, obtains universal resource identifier URI field or message body field information in this message.
Described media resource control unit 12 comprises again: judgment sub-unit 121, call subelement 122, resolve subelement 123 and control sub unit 124 wherein, described judgment sub-unit 121, link to each other with packet parsing subelement 112, be used for judging the whether embedding media resource control operation of received universal resource identifier URI field or message body field information; The described subelement 122 that calls links to each other with judgment sub-unit 121, and corresponding packet parsing function is called in control operation according to media resource; Described parsing subelement 123 and calls subelement 122 and links to each other, and is used to resolve corresponding media resource control operation; Described control sub unit 124 links to each other with parsing subelement 123, according to analysis result the respective media resource of session connection is controlled.
Described media resource control operation comprises: basic voice packet agreement and extended voice packet protocol in the MGCP.But the present invention is not limited to these two kinds, so long as can realize the agreement of media resource control or user-defined format message can, and in order to realize identical functions.All be included in protection scope of the present invention.
The realization function of each unit of the above device sees also the implementation procedure of said method, does not repeat them here.
This shows, the present invention is embedded into " BAU " in the existing media resource control protocol, " AAU " in the Session Initiation Protocol, just can finish whole call flow, realizes the processing of multiple business, realization media resource control, as: playback, collect the digits, recording, video playback etc.As long as described MRS and control appliance just can be finished one or more complete call flows mutual by Session Initiation Protocol, thereby reduce the complexity of business realizing, and effectively control the utilance of media resource.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1, a kind of control method of media resource is characterized in that, comprises step:
A, Media Resource Server obtain universal resource identifier field or the message body field in the session initiation protocol message;
B, if embedding media resource control protocol message in described universal resource identifier field or the message body field then the respective media resource of session connection is controlled according to the operation of described media resource control protocol message.
According to the control method of the described media resource of claim 1, it is characterized in that 2, steps A specific implementation process is:
A1: Media Resource Server receives the session initiation protocol message;
A2:, obtain universal resource identifier field or message body field in this message by resolving described session initiation protocol message.
According to the control method of the described media resource of claim 1, it is characterized in that 3, described media resource control protocol message comprises: the basic voice packet in the MGCP and/or the protocol massages of extended voice bag.
According to the control method of claim 1 or 3 described media resources, it is characterized in that 4, the form of described embedding media resource control protocol message is: the medium attended operation. protocol type. action type, wherein each field uses ". " to separate.
According to the control method of the described media resource of claim 4, it is characterized in that 5, the form of described embedding media resource control protocol message is specially:
Annc|conf.BAU|AAU.pa|pc|pr (" BAU " message | " AAU " message)
Wherein, described " | " expression or relation, each field uses ". " to separate; Described annc|conf represents that a certain connection or meeting operate; Described BAU|AAU represents that subsequent packet uses basic voice packet or extended voice bag to resolve; Described pa|pc|pr represents playback or collects the digits or recording operation; Described (" BAU " message | " AAU " message) basic voice packet of expression or extended voice bag request message content.
According to the control method of the described media resource of claim 5, it is characterized in that 6, the specific implementation process of described step B is:
Media Resource Server is judged in described universal resource identifier field or the message body field the basic voice packet in the embedding media resource control protocol message whether or the protocol massages of extended voice bag; If then call the packet parsing function of this basic voice packet or extended voice bag it resolved accordingly, and the respective media resource of session connection is controlled according to analysis result; Otherwise, call other function the respective media resource of session connection controlled.
7, a kind of control device of media resource is characterized in that, described device comprises:
Acquiring unit is used for obtaining the universal resource identifier field or the message body field information of session initiation protocol;
The media resource control unit, when being used for the universal resource identifier field that gets access at described acquiring unit or message body field embedding media resource control protocol message, the respective media resource of session connection is controlled according to the operation of described media resource control protocol message.
According to the control device of the described media resource of claim 7, it is characterized in that 8, described acquiring unit comprises:
Message receives subelement, is used to receive the session initiation protocol message;
The packet parsing subelement receives subelement with message and links to each other, and is used to resolve the session initiation protocol message of reception, obtains universal resource identifier field or message body field information in this message.
9, the control device of described media resource according to Claim 8 is characterized in that described media resource control unit comprises:
Judgment sub-unit links to each other with the packet parsing subelement, is used for judging whether embedding media resource control protocol message of received universal resource identifier field or message body field information;
Call subelement, link to each other, according to the corresponding packet parsing function of the operation calls of media resource control protocol with judgment sub-unit;
Resolve subelement, and call subelement and link to each other, be used to resolve corresponding media resource control operation;
Control sub unit links to each other with the parsing subelement, according to analysis result the respective media resource of session connection is controlled.
According to the control device of the described media resource of claim 9, it is characterized in that 10, described media resource control protocol message comprises: the basic voice packet in the MGCP and/or the protocol massages of extended voice bag.
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| CN101815138B (en) * | 2010-04-16 | 2012-11-28 | 杭州华三通信技术有限公司 | Method and device for leaving meeting message |
| CN101860743B (en) * | 2010-06-24 | 2012-02-08 | 北京理工大学 | Real-time digital video watermarking method based on MPEG-2 standard |
| CN104994248B (en) * | 2015-06-29 | 2018-05-22 | 深圳中兴网信科技有限公司 | Media consulation method and system in sound-recording business |
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