CN101119292B - Method of negotiating data traffic transmission between gateways - Google Patents
Method of negotiating data traffic transmission between gateways Download PDFInfo
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- CN101119292B CN101119292B CN200610104050XA CN200610104050A CN101119292B CN 101119292 B CN101119292 B CN 101119292B CN 200610104050X A CN200610104050X A CN 200610104050XA CN 200610104050 A CN200610104050 A CN 200610104050A CN 101119292 B CN101119292 B CN 101119292B
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Abstract
The present present invention discloses a method of negotiating the data transmitting services amid the gateways, including the followings: A. a first gate way reserves resources for the transmission manner adopted by the supported data service, which sends the service ability set of the data service of the reserved resources to the second gateway by building connection; B. according to the self data service ability set and the received data service ability set applying taking, a second gateway selects a transmission manner supported by the two gateways for each data service, and reserves resources, after that, the data service ability set of the reserved resources is send to the second gateway by the second data through building the response of the connection application; C. after receiving the response, according to the service ability set, the first gateway confirms the transmission manners to each data service adopted by the second gateway and then sends confirm information to thesecond gateway.
Description
Technical field
The present invention relates to the technology of data services between the gateway, particularly a kind of method of negotiating data traffic transmission between gateways.
Background technology
Data service is meant that two data terminals under the calling and called side gateway are by the mutual realization corresponding business between both sides' gateway.If two data terminals are facsimile machines, two facsimile machine terminals realize facsimile service by gateway; If two data terminals are modulator-demodulator (modem), what two modem realized by gateway is the modem business.
Realize that by gateway the main mode of facsimile service is (VBD) mode of data penetration transmission in the voice band and mode T.38, the main mode by gateway realization modem business is the VBD mode.
Wherein, the VBD mode is for passing through the code encoding/decoding mode less to signal impairment, data flow is hanged down the encoding and decoding of decreasing as voice flow to be handled, the encoding and decoding standard that adopts be ITU-T G.711 and ITU-TG.726, this mode realizes simply need not being concerned about the implication of concrete data flow, handles just passable as long as data flow is used as voice flow, disposal ability consumption to gateway is very little, can be applied in the processing to various data service data flow.But this mode occupied bandwidth is big, is subjected to the influence of Internet protocol (IP) network fluctuation bigger, is difficult to resist the packet loss and the time delay that occur on the IP network and changes.
T.38 mode is for to have stipulated the agreement of data-signal conversion transmission method by some, the data-signal that transmitting terminal is sent is converted into after the data message that is fit to the IP network transmission is transferred to the gateway of opposite end by demodulation, recovers to send to the mode of the data-signal of receiving terminal again by modulation.The advantage of this mode is more intense to the defensive ability/resistance ability that occurs various damages on the IP network, and bigger success rate and the stability that has improved data service, shortcoming are to realize more complicated, and is bigger to the disposal ability consumption rate of gateway.
At present, gateway can be gateway control protocol (H.248) gateway, Media Gateway Control Protocol gateway and session initiation protocol (SIP) gateway, when transmitting data service, can realize in theory H.248 gateway and H.248 between the gateway, between MGCP gateway and the MGCP gateway, between SIP gateway and the SIP gateway, H.248 between gateway and the MGCP gateway, between MGCP gateway and the SIP gateway, transmitting data stream between gateway and the SIP gateway H.248.
Wherein, H.248 what H.248 gateway adopted is the agreement that is specifically designed to media resource control, and its basic principle is: the various resources on the gateway are conceptualized as terminal, and terminal is divided into physical terminal and ephemeral terminations again.Physical terminal is represented some physical entities with semipermanent existence, as the Time Division Multiplexing time slot; The public resource that on behalf of provisional application, ephemeral terminations use the back to discharge flows as real-time host-host protocol (RTP).Combination between the terminal is conceptualized as style of writing, with the topological relation of describing between the terminal.Abstract based on these, call proceeding is actually the operation to terminal and last style of writing, finishes by command request between gateway controller and the gateway and response, and order comprises increase, modification, deletion and notice etc.; Command parameter is called descriptor, is categorized as attribute, signal, incident and statistics, and the parameter with professional correlation is polymerized to a bag in logic.
The MGCP that the MGCP gateway adopts calls out hierarchy of control structure, calls out to be controlled at the outside of gateway and to be handled by the call control device of outside, can be synchronously between the MGCP supposition call control device and as one man send the gateway of order to its control.MGCP is a master/slave agreement, and gateway need be carried out the order that gateway control apparatus sends.MGCP adopts link model, the key concept of this model is an end points and be connected, and end points is the transmitting terminal or the receiving terminal of data flow, and it can be physics or virtual, finish by command request between gateway control and the gateway and response, order comprises increase, modification, deletion and notice etc.
The SIP that the SIP gateway adopts is an application layer control protocol, can be used for setting up, revises and stop Multimedia session or meeting.SIP also can invite the participant to participate in the session that has existed, as Multi-Party Conference.In the SIP gateway, also can use Session Description Protocol (SDP), its purpose is exactly in media session, transmits medium stream information, allows the recipient of conversation description to go to participate in session, and SDP has defined the consolidation form of conversation description.
In the fixed network, between gateway during transmitting data stream, both sides' gateway is finished the negotiation that can finish mode that data service is adopted when encoding and decoding speech is consulted for being also reserved resource of data service in the encoding and decoding speech reserved resource, and this mode is called the gateway control mode.
At present, gateway can be media gateway (MG) or SIP gateway, and the controller of control gateway can be Media Gateway Controller (MGC).
MG control T.38 automatic switching mode be meant when MGC to calling and called both sides MG application voice resource or SIP GW initiatively during reserved resource, both sides MG is except reserving voice resource, also reserve the T.38 mode resource of transmitting facsimile business automatically, propose, after called negotiation selection and caller confirm this three steps flow process, finish the negotiation of the T.38 mode of encoding and decoding speech and transmitting facsimile business between the calling and called MG simultaneously by caller.After negotiation was finished, after MG detected facsimile service, MG automatically switched to T.38 mode transmitting facsimile business, and facsimile service automatically switches to speech pattern after finishing, and realized the automatic switchover of carrying out between voice channel and the fax passage.
If T.38 the MG of calling and called any one party do not support mode or support T.38 mode but can't reserve sufficient resources for mode T.38, this MG responds expression to the opposing party's MG and can not reserve T.38 the mode resource or do not respond so.
Fig. 1 controls the T.38 method flow diagram of automatic switching mode for prior art MG, and the entity in the fixed network that relates to comprises calling party's MG1, callee's MG2 and the MGC of control MG1 and MG2, and its concrete steps are:
Step 100, MGC send the order that connects to MG1, and this order is carried two SDP and described, and one is the description to encoding and decoding speech, and another is the description to the facsimile service capability set, promptly is described as T.38 mode.
Step 101, MG1 are returned the response message of the order that connects to MGC, and this message is carried two SDP, and one is that MG 1 is the voice reserved resource, and to be MG1 be mode reserved resource T.38 for another.
If T.38 MG1 do not support mode or support T.38 mode but currently can not be mode reserved resource T.38, MG1 responds expression and can not reserve T.38 resource or do not respond.
Step 102, MGC send the order that connects to MG2, and this order is carried two SDP and described, and one is the description to encoding and decoding speech, and another is the description to the facsimile service capability set, promptly is described as T.38 mode, and the SDP that MG1 responds describes.
Step 103, MG2 according to self capability set and receive SDP that MG1 responds and describe and select suitable encoding and decoding speech and reserve T.38 mode resource, the response message by the order that connects returns to MGC.
When reserving T.38 the mode resource according to the capability set of self, if T.38 MG2 does not support mode or support T.38 mode but currently can not be mode reserved resource T.38 that MG2 responds expression and can not reserve T.38 resource or do not respond.
The encoding and decoding speech that step 104, MGC are selected MG2 and reserve T.38 the mode resource and adopt SDP to describe to send to MG1.
Step 105, MG1 reply acknowledge message to MGC after receiving the SDP description.
The precondition that realizes the described scheme of Fig. 1 is that T.38 calling and called both sides MG supports mode and can be mode reserved resource T.38, and this scheme can only be applicable to that both sides MG supports mode T.38 and the realization of facsimile service can both be for mode reserved resource T.38 the time.Therefore, this scheme has following shortcoming:
The first, T.38 precondition regulation calling and called both sides MG supports mode and sufficient resources is arranged, and has so only considered the ecotopia realization of fax down, in case precondition does not satisfy, calling and called both sides' fax will be failed;
The second, this scheme can't realize the modem business;
The 3rd, this scheme does not have the flow process of definition and other data service protocol interconnections, and only stipulated to support MG to control the facsimile service intercommunication between the MG of automatic switching mode T.38, might fail with the MG intercommunication data service of adopting other data service agreements, in addition, T.38 mode is mutual exclusion with agreement V.152, V.152 agreement is formulated is not support how to realize autotomying fast under the mode T.38 to change to scheme under the VBD mode, the MG that adopts the described scheme of Fig. 1 during with the MG intercommunication of adopting agreement V.152 the transmission of data service can't realize at all.
Because the data service capability set of gateway comprises facsimile service capability set and modem professional ability collection etc. at present, the data service of gateway support just has facsimile data business and modem data service etc.Just need classify in order correctly, comprehensively to represent gateway total data professional ability collection to different data services.V.152 agreement is to formulate under all only for the VBD mode at the facsimile service capability set that limits both sides' gateway and modem professional ability collection, and how regulation realizes the method that the VBD mode of gateway is consulted and changed automatically.
V.152 agreement is to realize the employed agreement of VBD mode of gateway, original intention is that the fax ability of hypothesis calling and called both sides gateway is only supported the VBD mode and do not supported T.38 mode, because the data flow of modem business transmits under the VBD mode, so when transmission modem was professional, the two gateways of sending out of calling and called were also only supported the VBD mode and are not supported T.38 mode.Therefore, in a single day gateway detects facsimile data business or modem data service and need not to judge specifically be which kind of data service with regard to automatic switchover, so just can realize auto-negotiation between the gateway and adaptive switched, has improved processing speed.
V.152 the protocol requirement gateway increases a=gpmd:＜format in SDP describes〉＜parameterlist〉the VBD mode is described,, the VBD mode illustrates that this gateway supports V.152 auto-negotiation agreement if being designated YES.
Increased a=gpmd:＜format〉＜parameter list〉attribute, can be implemented in the negotiation of finishing facsimile service and modem business when encoding and decoding speech is consulted, in case realize that gateway detects the facsimile data business or the modem data service realizes transmission with regard to switching to the VBD mode at once.Because the precondition of agreement is not support T.38, therefore being that facsimile service or modem Service Gateway all transmit data flow in the VBD mode, is facsimile service or modem business with regard to the type that need not further judgment data business since so realized switching to fast the VBD mode certainly.
But this method can only be applicable to that both sides' gateway do not support the T.38 situation of mode, and applicable being limited in scope can't be satisfied the transmission of the data service of various data services under the general condition.In addition, the described scheme of this scheme and Fig. 1 is mutual exclusion, the described scheme of Fig. 1 is that both sides MG supports T.38 how to realize switching to fast the T.38 scheme of mode transmitting facsimile business under the mode situation, when adopt this scheme and the described employing of Fig. 1 T.38 just can't realize during the MG intercommunication data service of mode at all.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method of negotiating data traffic transmission between gateways, this method can realize adopting two negotiating data traffic transmission between gateways of any-mode, thereby transmits the data service of being consulted between two gateways of realization employing any-mode.
According to above-mentioned purpose, technical scheme of the present invention is achieved in that
A kind of method of negotiating data traffic transmission between gateways, this method comprises:
After A, first gateway are the transmission means reserved resource that adopts of the data service supported, the professional ability collection of the data service of reserved resource is sent to second gateway by the request of connecting, and the transmission means that the data service of being supported of the described reserved resource of steps A is adopted is all transmission meanss that the data service supported is adopted;
After transmission means and reserved resource that a kind of both sides' gateway all supports are selected in every kind of data service of professional ability set pair of the data service that B, second gateway carry according to the professional ability collection and the received request of its data business, the professional ability collection of the data service of reserved resource is sent to first gateway by the request responding that connects, and the transmission means that the data service of the described reserved resource of step B is adopted is a kind of transmission means in the common factor of professional ability collection of the professional ability collection of its data business and the data service that received request is carried;
After C, first gateway receive this response, confirm transmission means that data service that both sides' gateway is all supported adopts according to the professional ability collection of the data service of carrying after, send acknowledge message for second gateway;
Described data service is facsimile service and modem business.
The described request responding that connects of described request of connecting of steps A and step B is transmitted by the gateway controller between first gateway and second gateway.
This method also comprises:
Gateway controller sends to first gateway and second gateway with the sorting parameter and the corresponding service capability set field of each data service;
The professional ability collection of the described data service with reserved resource of steps A by the process that the request of connecting sends to second gateway is: the mode reserved resource that first gateway is supported every kind of data service, and after in the sorting parameter corresponding service capability set field of this data service, adding the transmission means of being supported, send to second gateway by the request of connecting through gateway controller;
The professional ability collection of the described data service with reserved resource of step B by the process that the request responding that connects sends to first gateway is:
The transmission means that second gateway selects a kind of both sides all to support to every kind of data service, and be this transmission means reserved resource, and after in the sorting parameter corresponding service capability set field of this data service, adding the transmission means of selecting, send to first gateway by the request responding that connects through gateway controller.
Described gateway controller is a Media Gateway Controller.
In steps A, this method also comprises: first gateway is an encoding and decoding speech or/and behind the coding and decoding video reserved resource, the encoding and decoding speech of reserved resource is asked to send to second gateway or/and coding and decoding video is set up by connection; In step B, this method also comprises: second gateway or/and behind the coding and decoding video reserved resource, sends to first gateway with the encoding and decoding speech of reserved resource or/and coding and decoding video is set up request responding by connection for the encoding and decoding speech selected.
Described first gateway is the caller gateway, and second gateway is called gateway.
Described gateway is media gateway MG or conversation inceptive protocol gateway SIP GW.
Described first gateway and second gateway are respectively gateway control protocol H.248 gateway and H.248 gateway, MGCP gateway and MGCP gateway, conversation inceptive protocol gateway and SIP gateway, H.248 gateway and MGCP gateway, MGCP gateway and SIP gateway or H.248 gateway and SIP gateway.
From such scheme as can be seen, the present invention is when consulting the data service of being transmitted, first gateway by after the support data service adopts whole transmission means reserved resources, the professional ability collection of support data service is sent to second gateway, second gateway according to the professional ability collection of self and the professional ability collection that receives by after being supported a kind of transmission means reserved resource of data service selection, the professional ability collection of the data service of supporting of reserved resource is returned to first gateway, after obtaining the affirmation of first gateway, finish the negotiation of institute's transmitting data service.Owing to the present invention's different modes mutual exclusion when consulting to same data service unlike two schemes of the prior art, so method provided by the invention has realized adopting two negotiating data traffic transmission between gateways of any-mode, thereby transmit the data service of being consulted between two gateways of realization employing any-mode.
Description of drawings
Fig. 1 controls the T.38 method flow diagram of automatic switching mode for prior art MG;
Fig. 2 is the method flow diagram of negotiating data traffic transmission between gateways of the present invention;
Fig. 3 is the method embodiment flow chart of negotiating data traffic transmission between the calling and called MG of the present invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, below lift specific embodiment and, the present invention is described in more detail with reference to accompanying drawing.
Because the data service agreement of gateway support may comprise multiple, and how existing scheme realizes data service when all only considering only to support a kind of data service agreement, even some data service agreements still is mutual exclusion, so the method that proposes of the present invention method of how to consult various data services between the gateway when gateway is supported the several data service protocol generally speaking.
In the present invention, be MG with the gateway, the controller of control gateway is that MGC is that example describes.
Because the data service capability set of MG comprises facsimile service capability set and modem professional ability collection etc., that is to say that the data service that MG supports has facsimile data business and modem data service etc., therefore in order to realize purpose of the present invention, the whole data service capability set of the just necessary correct and comprehensive expression MG of MG need be classified to all data services of MG support.Carry out putting off until some time later whole transmission meanss that bright MG supports every kind of data service on the basis of classification in the data service that realization is supported MG, the professional ability collection that every kind of data service MG is supported just is described.
The solution of the present invention thinking is: when MGC connects order in transmission, realize the data service that calling and called MG may support is classified by increasing a parameter, as be categorized as: data services such as facsimile service and modem business, when caller MG responds every kind of data service is illustrated whole modes that current MG supports, the data service capability set that just MG supported is T.38 mode and VBD mode as explanation facsimile service capability set; Called MG finishes voice or/and coding and decoding video is finished the negotiation of professional ability collection of all data services and the transmission means of selecting a kind of both sides MG all to support to every kind of data service when consulting, as the facsimile service capability set being consulted to select T.38 mode or modem professional ability collection being consulted to select VBD mode etc.
MG is when making a call, key-course equipment, issue when connecting order as MGC, in this order, increase the data service classification that a parameter realization may be supported MG, and professional ability collection field of increase requires MG to respond the professional ability collection that every kind of data service is supported in this parameter, just whole transmission meanss that every kind of data service is supported.During called MG receipt of call, key-course equipment issues same order and gives called MG, and the situation of carrying caller MG reserved resource, the transmission means that called MG selects a kind of both sides MG to support to every kind of data service.
If gateway is the SIP gateway, then the SIP gateway is when making a call, this gateway increases a parameter in message classifies to the data service of this gateway support, and every kind of data service of being supported is increased a professional ability collection field fills in the professional ability collection that this gateway is supported this data service in this parameter.During SIP gateway receipt of call, this gateway increases a parameter in receiveing the response classifies to the data service of this gateway support, and the transmission means of selecting a kind of both sides' gateway all to support to every kind of data service.
Fig. 2 is the method flow diagram of negotiating data traffic transmission between gateways of the present invention, and the network entity that this method relates to comprises calling party's gateway (GW) 1 and callee's GW2, and its concrete steps are:
Step 201, GW1 are reserving the encoding and decoding speech resource or/and in the coding and decoding video resource, transmission means for every kind of data service support, be professional ability collection reserved resource, institute's reserved resource can comprise facsimile service capability set resource and modem professional ability fund-raising source etc.According to the situation of reserved data resource in the professional ability collection field of sorting parameter, fill in mode that GW1 supports facsimile service, to the mode of modem business support etc., promptly carry the professional ability collection of each data service.GW1 will carry and reserve encoding and decoding speech or/and the request of connecting of the professional ability collection of coding and decoding video, every kind of data service being supported sends to GW2.
If when having MGC between GW1 and GW2, this request of connecting sends by MGC.
Step 202, after GW2 receives the request of connecting of GW1 transmission, select voice or/and coding and decoding video according to the professional ability collection of self, transmitting facsimile trafficwise and transmission modem trafficwise etc. are also reserved voice or/and the coding and decoding video resource for selected mode, the professional mode resources that adopt of mode resource that facsimile service adopts and modem etc. are every kind of data service and select the transmission means that a kind of both sides GW supports and be this transmission means reservation professional ability resource, in the professional ability collection field of sorting parameter, fill in the mode that GW2 adopts facsimile service according to the situation of reserved data service resources, to the professional mode that adopts of modem etc.GW2 will carry the encoding and decoding speech of selection or/and the transmission means that the both sides that coding and decoding video, every kind of data service are selected support sends to GW2.
If when having MGC between GW1 and GW2, the result that GW2 selects sends by MGC.
After step 203, GW1 receive this result, the voice that the validation of information GW2 that carries according to this result selects are or/and the transmission means of coding and decoding video, each data service selection, and return acknowledge message to GW2, the process of the negotiation data business between GW1 and the GW2 is finished.
Like this, the selection of the transmission means that the classification by having realized data service after the flow process that calling party GW1 proposes, callee GW2 selects and calling party GW1 confirms and every kind of data service both sides gateway are all supported is as long as caller, called party GW detects just to automatically switch under the transmission means that is consulted behind the corresponding data business event and transmits afterwards.
Lift a specific embodiment explanation the present invention.
This specific embodiment is for describing the embodiment of negotiation data business between the realization H.248MG by modification SDP.
At first, in MGC is handed down to the SDP of calling and called MG, increase parameter: a=＜data type 〉:＜datacapabilities 〉, because data type has facsimile service and modem business, so need to add these two attributes, carry a=fax:$ and a=modem$ at SDP when MGC issues for the calling and called gateway to connect request.If also have other data services, can increase data type again.
Secondly, calling party MG is when responding MGC, reserve calling party's MG voice or/and the professional ability fund-raising source of coding and decoding video resource, the facsimile service supported and the professional ability fund-raising source of modem business, and according to the situation of reserved data service resources, in the SDP parameter, " $ " is revised as to the mode of transmitting facsimile business support with to transmitting the mode of modem business support, sends to callee MG by MGC.
As: calling party MG is when responding
When a=fax:T.38VBD represented that the data service of transmitting is facsimile service, the professional ability collection was for supporting T.38 mode and VBD mode.
When a=modem:VBD represented that the data service of transmitting is the modem business, the professional ability collection was for supporting the VBD mode.
At last, callee MG is when responding MGC, callee MG is receiving voice that calling party MG reserves or/and behind coding and decoding video resource, the facsimile service resource of being supported and the modem service resources, selects voice or/and coding and decoding video, transmitting facsimile trafficwise and transmission modem trafficwise and reserve voice or/and video resource, facsimile service capability set resource and modem professional ability fund-raising source for the mode of selecting according to the professional ability collection of self supporting.The result who selects according to every kind data service is revised as every kind of selected transmission means of data service with " $ " in the parameter that increases, send to caller MG by MGC.
As callee MG when responding
When a=fax:T.38 represented that the data service of transmitting is facsimile service, negotiation result was for adopting T.38 mode.
When a=modem:VBD represented that the data service of transmitting is the modem business, negotiation result was for adopting V.152 agreement.
Fig. 3 is the method embodiment flow chart of negotiating data traffic transmission between the calling and called MG of the present invention, gateway with the calling and called both sides is that MG is the example explanation, the network entity that this method relates to comprises calling party's MG1, callee's MG2 and the MGC of administration MG1 and MG2, and its concrete steps are:
Step 300, MGC send the order that connects to MG1, and this order request MG1 is encoding and decoding speech, T.38 fax and VBD reserved resource.
Step 301, MG1 be according to the professional ability collection reserved resource of self, and to the response that MGC returns this order, carry the professional ability collection of the various data services of supporting of reserved resource.
If the facsimile service capability set of MG1 is supported T.38 mode and V.152 agreement, then in response, carry the T.38 ability of mode and VBD mode, simultaneously a=fax:$ is revised as a=fax:T.38VBD.If only support V.152, then a=fax:$ is revised as a=fax:VBD, expression facsimile service ability is only supported VBD pattern V.152.If only support T.38 mode, then a=fax:$ is revised as a=fax:T.38, expression facsimile service ability is only supported T.38 mode.If dual mode is not supported, then a=fax:$ is revised as a=fax:, the expression MG1 that fills a vacancy does not support the transmission means of any facsimile service.
Step 302, MGC send the order that connects to MG2, and this order request MG2 is encoding and decoding speech, T.38 fax and VBD reserved resource, and the professional ability collection of each data service of supporting of institute's reserved resource that MG1 returns is also carried in this order.
Step 303, MG2 are determined the transmission means that data service that various both sides MG support is adopted and are this mode reserved resource that according to self the capability set and the professional ability collection of the various data services of supporting of institute's reserved resource of returning of MG1 the response by this order returns to MGC then.Determine in the professional ability collection common factor of this data service ability of the mode MG1 that to be professional ability collection that every kind of data service MG2 is selected MG2 respond with MG1.
If the facsimile service capability set of MG1 is for supporting T.38 mode and VBD mode, modem professional ability collection is for supporting the VBD mode, and the facsimile service capability set of MG2 is supported T.38 mode, then MG2 is after facsimile service is reserved the resource support mode T.38, in response message, carry facsimile service and support the T.38 professional ability collection of mode, simultaneously a=fax:$ is revised as a=fax:T.38.If the facsimile service capability set of MG2 is supported the VBD mode, then MG2 after facsimile service is reserved the resource of supporting the VBD mode, carries the professional ability collection that facsimile service is supported the VBD mode in response message, simultaneously a=fax:$ is revised as a=fax:VBD.If the facsimile service capability set of MG2 is not supported any way, then MG2 carries facsimile service for empty in response message, simultaneously a=fax:$ is revised as a=fax:.The processing procedure of modem business is also just the same.
Step 304, MGC send to MG1 with encoding and decoding speech, facsimile service transmission means and the modem service transferring mode that MG2 selects.
Step 305, MG1 send to MGC and confirm to receive message, and negotiations process finishes.
The method that the present invention consults the data service transmitted goes for fixedly under the flexible exchanging network between any two gateways, these gateways comprise H.248 gateway, MGCP gateway and SIP gateway, and the data service of being transmitted can comprise facsimile service and modem business etc.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the method for a negotiating data traffic transmission between gateways is characterized in that, this method comprises:
After A, first gateway are the transmission means reserved resource that adopts of the data service supported, the professional ability collection of the data service of reserved resource is sent to second gateway by the request of connecting, and the transmission means that the data service of being supported of the described reserved resource of steps A is adopted is all transmission meanss that the data service supported is adopted;
After transmission means and reserved resource that a kind of both sides' gateway all supports are selected in every kind of data service of professional ability set pair of the data service that B, second gateway carry according to the professional ability collection and the received request of its data business, the professional ability collection of the data service of reserved resource is sent to first gateway by the request responding that connects, and the transmission means that the data service of the described reserved resource of step B is adopted is a kind of transmission means in the common factor of professional ability collection of the professional ability collection of its data business and the data service that received request is carried;
After C, first gateway receive this response, confirm transmission means that data service that both sides' gateway is all supported adopts according to the professional ability collection of the data service of carrying after, send acknowledge message for second gateway;
Described data service is facsimile service and modem business.
2. the method for claim 1 is characterized in that, the described request responding that connects of described request of connecting of steps A and step B is transmitted by the gateway controller between first gateway and second gateway.
3. method as claimed in claim 2, before steps A, this method also comprises:
Gateway controller sends to first gateway and second gateway with the sorting parameter and the corresponding service capability set field of each data service;
The professional ability collection of the described data service with reserved resource of steps A by the process that the request of connecting sends to second gateway is:
The mode reserved resource that first gateway is supported every kind of data service, and after in the sorting parameter corresponding service capability set field of this data service, adding the transmission means of being supported, send to second gateway by the request of connecting through gateway controller;
The professional ability collection of the described data service with reserved resource of step B by the process that the request responding that connects sends to first gateway is:
The transmission means that second gateway selects a kind of both sides all to support to every kind of data service, and be this transmission means reserved resource, and after in the sorting parameter corresponding service capability set field of this data service, adding the transmission means of selecting, send to first gateway by the request responding that connects through gateway controller.
4. as claim 2 or 3 described methods, it is characterized in that described gateway controller is a Media Gateway Controller.
5. the method for claim 1 is characterized in that, in steps A, this method also comprises:
First gateway is an encoding and decoding speech or/and behind the coding and decoding video reserved resource, the encoding and decoding speech of reserved resource is asked to send to second gateway or/and coding and decoding video is set up by connection;
In step B, this method also comprises:
Second gateway or/and behind the coding and decoding video reserved resource, sends to first gateway with the encoding and decoding speech of reserved resource or/and coding and decoding video is set up request responding by connection for the encoding and decoding speech selected.
6. the method for claim 1 is characterized in that, described first gateway is the caller gateway, and second gateway is called gateway.
7. the method for claim 1 is characterized in that, described gateway is media gateway MG or conversation inceptive protocol gateway SIP GW.
8. the method for claim 1, it is characterized in that described first gateway and second gateway are respectively gateway control protocol H.248 gateway and H.248 gateway, MGCP gateway and MGCP gateway, conversation inceptive protocol gateway and SIP gateway, H.248 gateway and MGCP gateway, MGCP gateway and SIP gateway or H.248 gateway and SIP gateway.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610104050XA CN101119292B (en) | 2006-07-31 | 2006-07-31 | Method of negotiating data traffic transmission between gateways |
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| CN200610104050XA CN101119292B (en) | 2006-07-31 | 2006-07-31 | Method of negotiating data traffic transmission between gateways |
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| CN101119292B true CN101119292B (en) | 2010-07-21 |
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| CN101800731B (en) * | 2009-02-06 | 2013-01-16 | 株式会社日立制作所 | Network transmission management server, network transmission management method and network transmission system |
| CN103023899B (en) * | 2012-12-05 | 2015-09-02 | 广东佳和通信技术有限公司 | The method of a kind of VoIP system several data business support |
| CN104811579B (en) * | 2014-01-26 | 2018-05-22 | 中国移动通信集团北京有限公司 | A kind of facsimile service processing system, method and apparatus |
| CN105812232B (en) * | 2014-12-30 | 2019-04-19 | 华为技术有限公司 | Data processing method and system, gateway and terminal based on webpage real time communication |
| US11171999B2 (en) | 2016-07-21 | 2021-11-09 | Qualcomm Incorporated | Methods and apparatus for use of compact concurrent codecs in multimedia communications |
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