CN1882113A - Method for realizing media gateway control protocol playback - Google Patents
Method for realizing media gateway control protocol playback Download PDFInfo
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- CN1882113A CN1882113A CN200510035375.2A CN200510035375A CN1882113A CN 1882113 A CN1882113 A CN 1882113A CN 200510035375 A CN200510035375 A CN 200510035375A CN 1882113 A CN1882113 A CN 1882113A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
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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
- H04L65/1043—Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
- H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
- H04M7/125—Details of gateway equipment
- H04M7/1255—Details of gateway equipment where the switching fabric and the switching logic are decomposed such as in Media Gateway Control
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Abstract
The invention relates to a control technique on the media gateway, which can realize the control protocol sound play of media gateway, to improve the signal efficiency and the sound effect, wherein the soft exchanger sends out signal, to request playing sound to all terminations of context; when the media gateway receives said signals, adding one special termination in the needed context, via said termination, to play sound for all terminations; if the needed context is not the conference context, requesting the conference bridge resource following the signal; when needing to stop playing, sending the termination ID to represent the idle signal of all terminations, and the media gateway will stop playing sound and delete the special termination used to play sound.
Description
Technical field
The present invention relates to control technology, particularly realize the technology of multi-party communication by MGCP to media gateway.
Background technology
In the communications field, traditional speech business is usually by public switched telephone network (Public SwitchedTelephone Network, be called for short " PSTN ") provide, PSTN is a kind of Circuit Switching Network, bring a lot of inconvenience to the data user, for example the communication price height, networking speed is slow, the stand-by period is long, transmission quality is low, increase new business difficulty etc.Along with development of Communication Technique with along with data service rapidly increases, business such as voice-and-data are carried on is jointly progressively becoming possibility on the single data network.
Next generation network (Next Generation Network, be called for short " NGN ") propose in this case just, and obtained development rapidly in recent years, NGN can carry professional asynchronous transfer mode (the Asynchronous TransferMode that also simultaneously great amount of data transmission is unloaded among the PSTN, be called for short " ATM ")/internetworking agreement (Internet Protocol, abbreviation " IP ") transmits on the network, make that integrated services such as voice, video, data become possibility on new generation network.Softswitch (SoftSwitch) technology that NGN adopts calling control and carrying media to be separated, the disposal ability of the network equipment is greatly improved, and can handle more traffic and the more traffic load of carrying.In order to realize that calling out control separates with carrying media, in NGN, use H.248/ MGCP (Medium Gateway Control Protocol, be called for short " MGCP ") realize, H.248 be a kind of bearer control protocol, this agreement provides foundation, modification and the releasing mechanism of control medium, while is some channel associated signalling of portability also, and the calling of support legacy network terminal is making up open and netting among the NGN that merges more and bringing into play important effect.In agreement H.248, the media resource operation on the media gateway (Media Gateway is called for short " MGW ") all is to be that unit carries out with terminal (Termination), and terminal operation carries out in context (Context) environment basically.Wherein, about the detail of agreement H.248, can be referring to " Gateway Protocol Version 1.0 " (RFC 3525), Chinese can be translated into " gateway control protocol 1.0 editions " (Request for Comments standard 3525).
At moving communicating field, 3G (Third Generation) Moblie (The Third Generation, abbreviation " 3G ") also begins to use for reference NGN, core net no longer is confined to circuit switching, can select ATM/IP as transmission technology, from third generation partner program (3rd Generation Partnership Project, be called for short " 3GPP ") the 4th edition (Release 4, be called for short " R4 ") beginning, the Softswitch mechanism that the NGN carrying separates with control, unified ATM/IP Packet Service carrying all has been introduced in the 3G core net.In order to realize calling out control and separating that carrying is controlled, mobile switching centre's (Mobile SwitchingCenter is called for short " MSC ") is split into MSC Server (server) and MGW.MSC Server finishes as chain of command Softswitch equipment and calls out control, mobile management function, MGW finishes carrying control and transfer function as the loading end media gateway device, interface between the two is called Mc interface, uses H.248 as bearer control protocol.
In Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division Multiple Access is called for short " the WCDMA ") system, structure as shown in Figure 1 to adopt the core net (Core Network is called for short " CN ") of calling out control and separating with carrying.As can be seen, in the core net, MSC is separated into chain of command Softswitch equipment MSC Server and loading end media gateway device MGW, connects by Mc interface between them; MSC Server and MGW are by radio network controller (Radio Network Controller is called for short " RNC ") mutual signaling message of difference and user data in Iu interface and the wireless access network (Radio AccessNetwork is called for short " RAN ").
With the calling between two mobile subscribers is example, supposes that two mobile subscribers' subscriber equipment inserts from different RAN, and these two RNC are connected to same MGW, and then call service group's pessimistic concurrency control as shown in Figure 2.Mobile subscriber's subscriber equipment (User Equipment, be called for short " UE ") insert RAN by air interface, RAN links to each other with core net with land circuit, and MSC Server in RAN and the core net realizes the intercommunication of chain of command, then realizes the intercommunication of loading end with the MGW in the core net.MSC Server sends increase (ADD) instruction in the message H.248 to MGW, control MGW adds two Termination in a Context, difference called after T1, T2, wherein T1 corresponds to the land circuit of RAN1, T2 is corresponding to the land circuit of RAN2, the topology of the two is two-way, thereby realizes the intercommunication of two information of mobile user streams.The detailed process of call setup can be referring to " Bearer-independentcircuit-switched core network; Stage 2 " (3GPP TS 23.205) agreement, Chinese can be translated into " bearer independent circuit switched core network, the 2nd stage " (third generation affiliate technical standard 23.205).
If desired the user is carried out playback, press H.248 agreement, MSC Server issues specific signal (Signal) on the Termination of correspondence.For example H.248.1 defined the calling progress sound of representing with cg and wrapped (Call Progress Tones Generator Package), the ring-back tone that wherein useful rt represents (Ringing Tone) signal, at the T1 cg/rt that signals up and down, the user of T1 correspondence can listen ring-back tone.For example, in the WCDMA system, the schematic diagram that the specific user is carried out playback as shown in Figure 3.
In order to realize that the user is multi-link calling or meeting with communicating in many ways simultaneously, H.248 agreement adopts the meeting bridge to realize.When the meeting bridge is realized MPTY, each side's audio signal phase adduction is done echo elimination, promptly carry out audio mixing and handle.For example, in the 3G system, the mobile subscriber can contract multiparty service (MultiPartyService, be called for short " MPTY ") carrying out multi-link calling, this moment this mobile subscriber can be simultaneously with communicate in many ways.For the MPTY business, the MGW in the 3G core net just uses conference bridge resources, after the voice that each side is sent carry out audio mixing according to certain algorithm, is distributed to the each side of conference participation again.Wherein, can be about the detailed description of MPTY referring to " MultiParty (MPTY) SupplementaryService; Stage 2 " (3GPP TS 23.084) agreement, Chinese can be translated into " supplementary service in many ways, the 2nd stage " (third generation affiliate technical standard 23.084).
According to the description of 3GPP TS 23.205 agreements, the carrying model of MPTY has two kinds, and in first kind of carrying model, each calling party occupies a Context, and the meeting bridge occupies a Context separately, as shown in Figure 4; In second kind of carrying model, all-calls side all is placed on and realizes the meeting bridge among the same Context, as shown in Figure 5.For any, all can there be a plurality of Termination among the meeting bridge Context of MGW.As can be seen, in order to realize the identical MPTY of calling party sum, than second kind of carrying model, first kind of carrying model needs more Context and needs to add more Termination, will expend more system resource like this, therefore second kind of MPTY carrying model is more economical, has more advantage.
In some cases, need all carry out playback, realize that the playback of hearing all-calls side is identical, and audition the time, can also continue talk the all-calls side of meeting.
The playback model schematic diagram of prior art scheme one as shown in Figure 6.MSC Server repeats the signal down on each Termination of meeting bridge Context, according to standard H.248.1, the direction of signal is from Termination to the Context outside (have in addition the bag regulation except), be the playback listener that only is superimposed upon the user to, therefore can other user's audibility not exerted an influence.
The playback model schematic diagram of prior art scheme two as shown in Figure 7.Two of prior art schemes are signaled down to a Termination, are internal or two-way for the signal assigned direction simultaneously, and like this, playback is used as the participate in a conference audio mixing of bridge of a phonetic entry, and each side can both hear this playback.
In actual applications, there is following problem in such scheme: the signaling efficient of prior art scheme one is not high, complicated operation, and for second kind of MPTY carrying model, can't realize that conference announcement and folk prescription playback are concurrent without interfering with each other carries out;
In the prior art scheme two by the Termination that signals down in deletion or when mobile, can conference announcement be exerted an influence, use scene limited, and also restricted for the type of playback, can't realize all types of playbacks.
Cause the main cause of this situation to be, prior art scheme one need be signaled down one by one to Termination all among the Context, need issue more signaling, and signaling efficient is not high, when especially comprising more Termination in Context, signaling efficient is lower; When having new user to add meeting, prior art scheme one need be reissued the playback signal to this user just can make this user hear ongoing playback in the meeting, complicated operation; And situation for the only corresponding Termination of user, be second kind of carrying model of MPTY, the independent control that prior art scheme one can't realize conference announcement and the folk prescription playback is concurrent when carrying out (is for example carried out earlier conference announcement and folk prescription playback simultaneously, stop conference announcement then, and the folk prescription playback is proceeded); When the user in meeting switches, can generate new Termination, if carry out the playback of the warning tone (announcement) of non-simple signal before this user is switched, for the new Termination after guaranteeing to switch also can hear this playback, prior art scheme one is for second kind of carrying model of MPTY, need be on the new Termination after the switching, again issue the playback signal, because warning tone has clear and definite beginning flag, can cause user's audition that starts anew again, the user can obviously feel the discontinuous of playback, for example plays " number that you dial does not exist, and dials after please investigating again " this prompting, if switch when being put into " no " word, the actual voice of hearing of user just may be " number that you dial are not ... the number that you dial does not exist, and dials after please investigating again ", and playback effect is very undesirable.
For prior art scheme two, the Termination that is carried out playback if signal down is deleted, perhaps be moved out of meeting Context, the conference announcement of other meeting each side will be stopped voluntarily, therefore prior art scheme two requires to be chosen down the Termination that signals to be retained in all the time among the meeting Context down, and this has limited the use scene of this scheme; And prior art scheme two can only be carried out playback to the sound that can specify playback sense, the signal of the warning tone bag part package definitions such as (Genericannouncement package) of definition just has directioin parameter (internal, external or two-way) and have only H.248.7 at present, therefore the type of playback has considerable restraint, can't realize all types of playbacks.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method that realizes media gateway control protocol playback, and signaling efficient and playback effect are improved when making the realization conference announcement.
For achieving the above object, the invention provides a kind of method that realizes media gateway control protocol playback, comprise following steps:
The A Softswitch to media gateway issue expression to target context in first signal of all terminal playbacks;
The described media gateway of B responds described first signal, increases by one first terminal in described target context, by this first terminal to all other terminal playbacks in this target context.
Wherein, the terminal iidentification of described first signal is the sign of all terminals of expression, comprises current already present all terminals in the target context, and in the subsequent voice calls control procedure, the new terminal that Softswitch is created in this target context.
In this external described method, described step B also comprises following substep:
When described media gateway is received described first signal, judge whether described target context is conference context, if not then being this target context application conference bridge resources;
Described media gateway is carried out audio mixing as the phonetic entry of other terminal in phonetic entry and the described target context by the meeting bridge with the playback of described first terminal, is distributed to other terminal except that first terminal in this target context again.
In this external described method, described terminal can be the virtual terminal of corresponding resource not.
In this external described method, the sign scope of described virtual terminal is made an appointment by described Softswitch and media gateway.
In this external described method, also comprise following steps:
The described Softswitch of C to described target context issue expression stop described to target context in the secondary signal of all terminal playbacks;
The described media gateway of D responds described secondary signal, and the playback of described first terminal is deleted from audio signal, and described first terminal is deleted from described target context.
In this external described method, also comprise following steps:
Described media gateway judges that whether terminal quantity in the described target context is less than 3, if then delete the conference bridge resources of this target context.
In this external described method, described secondary signal is a spacing wave, and its terminal iidentification is the sign of all terminals of expression.
In this external described method, described first terminal is the terminal of corresponding resource, the appointment topology is other terminal in the described target context of the unidirectional sensing of this first terminal when increasing this first terminal, the direction of first signal is internally, and the playback content is the warning tone bag of H.248.7 definition or the playback signal of other H248 protocol extension package definition.
In this external described method, described method can be applicable to broadband CDMA system, and described Softswitch can be a Mobile Switching Center Server.
By relatively finding, the main distinction of technical scheme of the present invention and prior art is, Softswitch signals down, requirement is to all Termination playbacks among the Context, when media gateway is received this signal, in needing the Context of playback, increase a special-purpose Termination, by this Termination to all the Termination playbacks among the Context.The Context of playback is not meeting Context if desired, then need apply for conference bridge resources after receiving above-mentioned signal.In the time of need stopping playback, can issue the spacing wave that Termination ID represents all Termination, media gateway can stop playback and delete the Termination that is exclusively used in playback this moment.
The Termination that is exclusively used in playback can be the virtual Termination of corresponding resource not, also can be the Termination of corresponding resource, and the latter need specify unidirectional topology.
Difference on this technical scheme has brought comparatively significantly beneficial effect, promptly at first, uses the present invention program, and conference announcement or only need issue signal one time when stopping conference announcement having reduced the signaling number that need issue, and has improved signaling efficient.
Second, among the present invention program among the Context all Termination playbacks begin simultaneously, finish simultaneously, the playing progress rate of warning tone is also in full accord, and do not need to issue again the playback signal when user is switched in the mobile communication system, avoid the discontinuous problem of playback, improved the effect of playback greatly.For issuing after the conference announcement instruction, newly add the Termination of Context, also hear ongoing playback in the meeting immediately.
The 3rd, to the deletion of original Termination among the Context or shift out without limits, for the playback type fully without limits, and be applicable to playback operation among the Context that has only 1 or 2 Termination, therefore expanded spendable occasion greatly, be with a wide range of applications.
The 4th, because the present invention program's playback not at original Termination among the Context, therefore in to the Context playback, can also be signaled down to the Termination that needs single playback, thereby realized parallel playback.
Description of drawings
Fig. 1 is in the WCDMA system, adopts and calls out the core network architecture schematic diagram that control separates with carrying;
Fig. 2 is that two mobile subscribers' subscriber equipment inserts and the call service group pessimistic concurrency control schematic diagram of two RNC when being connected to same MGW from different RAN;
Fig. 3 is in the WCDMA system, the specific user is carried out the schematic diagram of playback;
Fig. 4 is first kind of carrying model schematic diagram of MPTY;
Fig. 5 is second kind of carrying model schematic diagram of MPTY;
Fig. 6 is the playback model schematic diagram of prior art scheme one;
Fig. 7 is the playback model schematic diagram of prior art scheme two;
Fig. 8 is the realization flow chart of playback H.248 of first preferred embodiment according to the present invention.
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.
The present invention expands agreement H.248.1, and having increased with all Termination among the Context is the signal of operand, comprises the playback signal and stops the playback signal.When media gateway is received this playback signal, in needing the Context of playback, increase a Termination newly, by this newly-increased Termination playback, thereby utilize the meeting bridge to carry out the playback of audio mixing realization to Termination all among the whole C ontext.Essentially, this playback signal is carried out by a Termination is concrete, so can be compatible mutually with prior protocols.Because signal is only sent out once, so signaling efficient is higher.And be to other all Termination playback among this Context by a Termination, so playback is to begin simultaneously, finish simultaneously, the playing progress rate of warning tone is also in full accord, the discontinuous problem of playback when having avoided switching, the better effects if of playback.Because the present invention program is to the deletion of Termination among the Context or shift out without limits, for the playback type fully without limits, also be applicable to the playback operation among the Context that has only 1 or 2 Termination, therefore expanded spendable occasion greatly, be with a wide range of applications; Simultaneously since the present invention program's playback not at the Termination of user's correspondence, therefore in, can also issue the playback signal to the Termination of user's correspondence of needing single playback, thereby realize parallel playback all user's playbacks.
According to the present invention the realization of first preferred embodiment H.248 the method for agreement playback flow process as shown in Figure 8.
At first enter step 800, the target Context of soft switch in media gateway issues the playback signal.H.248.1 in the agreement, signal to issue with Termination be target.In the present embodiment, media gateway increases a virtual Termination, this virtual Termination is a kind of special terminal iidentification, its terminal iidentification is " all terminals ", be TerminationID=" All Terminations ", this virtual Termination playback promptly is equal to Termination playbacks all among this Context, abbreviates playback as Context.Of particular note, terminal iidentification " All Terminations " is similar with asterisk wildcard " All ", but difference is arranged also, " All Terminations " issued the playback signal or stop sound, should not influence the folk prescription playback signal on original each Termination, " All " asterisk wildcard then can cover the signal on original each Termination.In the present invention's first preferred embodiment, virtual Termination only needs the TerminationID value, does not take resource, does not need to be its distributed lines or address etc., and wherein, the scope of TerminationID value is appointed in advance by soft switch and media gateway.
Then enter step 810, media gateway judges that whether target Context is meeting Context, if then enter step 830, otherwise enters step 820 after receiving the playback signal.Wherein, meeting Context has used the meeting bridge, can carry out the audio mixing operation.
If target Context is not meeting Context, then in step 820, media gateway is this Context application conference bridge resources.In this step, the application conference bridge resources is in order to realize the operation of audio mixing.
If target Context is meeting Context or has applied for conference bridge resources that in step 820 then in step 830, media gateway is carried out playback audio mixing and is distributed to all Termination among this Context as a kind of phonetic entry.Wherein, the meeting bridge can carry out all phonetic entries exporting after audio mixing and echo are eliminated.
Then enter step 840, soft switch issues to target Context and stops tone signal, comes down to issue and stop tone signal to the virtual Termination of representative " All Terminations ".In the present invention's first preferred embodiment, stop tone signal and be spacing wave.
Then enter step 850, media gateway is with playback deletion from the audio mixing input.Wherein, with playback deletion from the audio mixing input, just can stop playback simultaneously to all Termination among the Context.Also can delete the virtual Termination of representative " All Terminations " this moment from Context, because do not used.
Then enter step 860, whether media gateway judges Termination number among the target Context less than 3, if then enter step 870, otherwise finishes.
If the Termination number among the target Context, illustrates then that this Context is not meeting Context less than 3, do not need to use conference bridge resources to carry out audio mixing, then in step 870, media gateway is deleted conference bridge resources.
Those of ordinary skill in the art understands, because the output behind the present invention program's audio mixing is distributed simultaneously, time started, concluding time and the playing progress rate of all Termination playback of uppick from audio mixing output are identical among the target Context, therefore for initiate Termination, the playback of also can the be the same synchronous identical playing progress rate of uppick with other Termination; As a same reason, under the situation of the warning tone of playing, if the user switches, owing to do not need to signal down again to relay sound, therefore the discontinuous situation of playback can not appear yet.
Based on basic principle of the present invention, other implementation also can be arranged, do not influence essence of the present invention.For example, in the present invention's second preferred embodiment, when needs to Context in all Termination playbacks, and when playback is the warning tone bag of H.248.7 definition, in target Context, increase (ADD) Termination (corresponding resource) in addition, and specify topology to point to other Termination for unidirectional Termination from increasing newly, by the playback signal is issued on the Termination that increases newly, just can realize Context in the playback of all Termination, when stopping, deleting this newly-increased Termination again to conference announcement.In addition, can also expand H.248 agreement, the signal description symbol is placed on Context ask this one-level, promptly Context be issued playback or stops tone signal, rather than the specific T ermination among the Context is issued playback or stops tone signal.
Though by with reference to some preferred embodiment of the present invention, the present invention is illustrated and describes, those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.
Claims (10)
1. a method that realizes media gateway control protocol playback is characterized in that, comprises following steps:
The A Softswitch to media gateway issue expression to target context in first signal of all terminal playbacks;
The described media gateway of B responds described first signal, increases by one first terminal in described target context, by this first terminal to all other terminal playbacks in this target context.
2. the method for realization media gateway control protocol playback according to claim 1, it is characterized in that, the terminal iidentification of described first signal is the sign of all terminals of expression, comprise current already present all terminals in the target context, and in the subsequent voice calls control procedure, the new terminal that Softswitch is created in this target context.
3. the method for realization media gateway control protocol playback according to claim 1 is characterized in that, described step B also comprises following substep:
When described media gateway is received described first signal, judge whether described target context is conference context, if not then being this target context application conference bridge resources;
Described media gateway is carried out audio mixing as the phonetic entry of other terminal in phonetic entry and the described target context by the meeting bridge with the playback of described first terminal, is distributed to other terminal except that first terminal in this target context again.
4. the method for realization media gateway control protocol playback according to claim 1 is characterized in that, described terminal can be the virtual terminal of corresponding resource not.
5. the method for realization media gateway control protocol playback according to claim 4 is characterized in that, the sign scope of described virtual terminal is made an appointment by described Softswitch and media gateway.
6. the method for realization media gateway control protocol playback according to claim 1 is characterized in that, also comprises following steps:
The described Softswitch of C to described target context issue expression stop described to target context in the secondary signal of all terminal playbacks;
The described media gateway of D responds described secondary signal, and the playback of described first terminal is deleted from audio signal, and described first terminal is deleted from described target context.
7. the method for realization media gateway control protocol playback according to claim 1 is characterized in that, also comprises following steps:
Described media gateway judges that whether terminal quantity in the described target context is less than 3, if then delete the conference bridge resources of this target context.
8. the method for realization media gateway control protocol playback according to claim 7 is characterized in that, described secondary signal is a spacing wave, and its terminal iidentification is the sign of all terminals of expression.
9. the method for realization media gateway control protocol playback according to claim 1, it is characterized in that, described first terminal is the terminal of corresponding resource, the appointment topology is other terminal in the described target context of the unidirectional sensing of this first terminal when increasing this first terminal, the direction of first signal is internally, and the playback content is the warning tone bag that H.248.7 defines.
10. according to the method for each described realization media gateway control protocol playback in the claim 1 to 9, it is characterized in that described method can be applicable to broadband CDMA system, described Softswitch can be a Mobile Switching Center Server.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100353752A CN100461878C (en) | 2005-06-17 | 2005-06-17 | Method for realizing media gateway control protocol playback |
| PCT/CN2006/001326 WO2006133645A1 (en) | 2005-06-17 | 2006-06-14 | A method for implementing the playback of the media gateway control protocol |
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| CNB2005100353752A CN100461878C (en) | 2005-06-17 | 2005-06-17 | Method for realizing media gateway control protocol playback |
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| CN100461878C CN100461878C (en) | 2009-02-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008077335A1 (en) * | 2006-12-22 | 2008-07-03 | Huawei Technologies Co., Ltd. | A method of a media gateway releasing an endpoint and the media gateway thereof |
| CN101867482A (en) * | 2010-06-21 | 2010-10-20 | 中兴通讯股份有限公司 | Method, equipment and system for realizing playback of meeting members in media meeting |
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| CN116488957B (en) * | 2023-04-25 | 2023-10-20 | 南京金阵微电子技术有限公司 | Signal processing method, system and bridge |
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| DE10295909D2 (en) * | 2001-12-17 | 2004-11-11 | Siemens Ag | Procedure for providing PSTN / ISDN services in next generation networks |
| CN100417166C (en) * | 2002-09-28 | 2008-09-03 | 中兴通讯股份有限公司 | Method for implementing simultaneous multichannel playing in session |
| CN100359899C (en) * | 2002-10-31 | 2008-01-02 | 中兴通讯股份有限公司 | Method of realizing multiplex sound reproduction simultaneously in conference through MEGACO protocol |
| US6959075B2 (en) * | 2003-03-24 | 2005-10-25 | Cisco Technology, Inc. | Replay of conference audio |
| CN100463404C (en) * | 2003-06-25 | 2009-02-18 | 中兴通讯股份有限公司 | Method for implementing telephone conference service by using media resource server |
| CN100525193C (en) * | 2003-11-28 | 2009-08-05 | 华为技术有限公司 | Method for implementing conference telephone in next generation network |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008077335A1 (en) * | 2006-12-22 | 2008-07-03 | Huawei Technologies Co., Ltd. | A method of a media gateway releasing an endpoint and the media gateway thereof |
| CN101867482A (en) * | 2010-06-21 | 2010-10-20 | 中兴通讯股份有限公司 | Method, equipment and system for realizing playback of meeting members in media meeting |
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|---|---|
| CN100461878C (en) | 2009-02-11 |
| WO2006133645A1 (en) | 2006-12-21 |
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