CN104320403A - Communication method and device - Google Patents
Communication method and device Download PDFInfo
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- CN104320403A CN104320403A CN201410606943.9A CN201410606943A CN104320403A CN 104320403 A CN104320403 A CN 104320403A CN 201410606943 A CN201410606943 A CN 201410606943A CN 104320403 A CN104320403 A CN 104320403A
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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
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
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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
- H04L65/1023—Media gateways
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1053—IP private branch exchange [PBX] functionality entities or arrangements
Abstract
The invention provides a communication method and device. The method includes the steps that a TG sends a first coding and decoding capability set supported by a calling party device to a coding and decoding conversion device, the first target coding and decoding obtained by the coding and decoding conversion device from the first coding and decoding capacity set through negotiation are returned to the calling party device, a coding and decoding capacity intersection of a local coding and decoding capacity set supported by the coding and decoding conversion device and a second code and decoding capacity set supported by the called party device is sent to the called party device, the second target coding and decoding obtained by the called party device from the coding and decoding capacity intersection through negotiation is returned to the coding and decoding conversion device. By means of the communication method and device, through intersection between the TG and the coding and decoding conversion device, when the calling party device by which the coding and decoding capacity set without the intersection is supported communicates with the called party device, coding and decoding conversion is conducted on the data flow transmitted between the two communication parties through the coding and decoding conversion device base on the negotiated target coding and decoding, and successful communication between the calling party device and the called party device is guaranteed.
Description
Technical field
The present invention relates to network communication technology field, particularly relate to communication means and device.
Background technology
Along with IP (Internet Protocol, Internet protocol) development of technology, increasing enterprise disposes based on SIP (Session Initiation Protocol, Session initiation Protocol) IP-PBX (Private Branch Exchange, user class switch).Based on this, there is SIP trunk technology, also referred to as SIP TRUNK, it is by providing VoIP (Voice over Internet Protocol, IP-based voice) relaying, IP-based interconnection and interflow between IP-PBX and the PSTN (Public Switched Telephone Network, PSTN) that can realize corporate intranet.But, in prior art, pass through TG (Trunk Gateway, Tandem Gateway) with when communicating between PSTN at corporate intranet, if the code/decode type that the equipment of communicating pair is supported is different, can communication failure be caused.
Summary of the invention
The invention provides a kind of communication means and device, time different with the code/decode type that equipment is supported solving existing communication both sides, easily cause the problem of communication failure.
According to the first aspect of the embodiment of the present invention, provide a kind of communication means, described method is applied on the Tandem Gateway TG with encoding and decoding conversion equipment connection, and described method comprises:
Send the first call request message to described encoding and decoding conversion equipment, in described first call request message, comprise the first coding/decoding capability collection that calling party device is supported;
Receive described encoding and decoding conversion equipment to consult successfully at its local coding/decoding capability collection supported and described first coding/decoding capability collection, transmission comprise described local coding/decoding capability collection return call request message;
Send the second call request message to called party instrument, the coding/decoding capability comprising the second coding/decoding capability collection that described local coding/decoding capability collection and described called party instrument are supported in described second call request message occurs simultaneously;
Return the first request response message to described calling party device, comprise described encoding and decoding conversion equipment in described first request response message and concentrate the first object encoding and decoding obtained from described first coding/decoding capability; And, return the second request response message to described encoding and decoding conversion equipment, in described second request response message, comprise the second target encoding and decoding that described called party instrument obtains through consultation from described coding/decoding capability occurs simultaneously.
According to the second aspect of the embodiment of the present invention, provide another kind of communication means, described method is applied on the encoding and decoding conversion equipment that is connected with TG, and described method comprises:
Receive the first call request message that described TG sends, in described first call request message, comprise the first coding/decoding capability collection that calling party device is supported;
The local coding/decoding capability collection supported at described encoding and decoding conversion equipment and described first coding/decoding capability collection are consulted successfully, to described TG send comprise described local coding/decoding capability collection return call request message, to make described TG send the second call request message to described called party instrument, the coding/decoding capability comprising the second coding/decoding capability collection that described local coding/decoding capability collection and described called party instrument are supported in described second call request message occurs simultaneously;
Concentrate from described first coding/decoding capability and obtain first object encoding and decoding, send to make described TG the first request response message comprising described first object encoding and decoding to described calling party device;
Receive the second request response message that described TG sends, in described second request response message, comprise the second target encoding and decoding that described called party instrument obtains through consultation from described coding/decoding capability occurs simultaneously.
According to the third aspect of the embodiment of the present invention, provide a kind of communicator, described application of installation is with on the TG of encoding and decoding conversion equipment connection, and described device comprises:
Request message transmitting element, for sending the first call request message to described encoding and decoding conversion equipment, comprises the first coding/decoding capability collection that calling party device is supported in described first call request message;
Receiving element, consults successfully at its local coding/decoding capability collection supported and described first coding/decoding capability collection for receiving described encoding and decoding conversion equipment, transmission comprise described local coding/decoding capability collection return call request message;
Described request packet sending unit, also for sending the second call request message to described called party instrument, the coding/decoding capability comprising the second coding/decoding capability collection that described local coding/decoding capability collection and described called party instrument are supported in described second call request message occurs simultaneously;
Response message transmitting element, for returning the first request response message to described calling party device, comprising described encoding and decoding conversion equipment and concentrating the first object encoding and decoding obtained from described first coding/decoding capability in described first request response message; And, return the second request response message to described encoding and decoding conversion equipment, in described second request response message, comprise the second target encoding and decoding that described called party instrument obtains through consultation from described coding/decoding capability occurs simultaneously.
According to the fourth aspect of the embodiment of the present invention, provide another kind of communicator, described application of installation is on the encoding and decoding conversion equipment be connected with TG, and described device comprises:
Receiving element, for receiving the first call request message that described TG sends, comprises the first coding/decoding capability collection that calling party device is supported in described first call request message;
Transmitting element, consult successfully for the local coding/decoding capability collection supported at described encoding and decoding conversion equipment and described first coding/decoding capability collection, to described TG send comprise described local coding/decoding capability collection return call request message, to make described TG send the second call request message to described called party instrument, the coding/decoding capability comprising the second coding/decoding capability collection that described local coding/decoding capability collection and described called party instrument are supported in described second call request message occurs simultaneously;
Obtaining unit, obtaining first object encoding and decoding for concentrating from described first coding/decoding capability, send to make described TG the first request response message comprising described first object encoding and decoding to described calling party device;
Described receiving element, also for receiving the second request response message that described TG sends, comprises the second target encoding and decoding that described called party instrument obtains through consultation from described coding/decoding capability occurs simultaneously in described second request response message.
In the embodiment of the present invention, sent the first coding/decoding capability collection of calling party device support to encoding and decoding conversion equipment by TG, and concentrate the first object encoding and decoding obtained to return to calling party device from the first coding/decoding capability through consultation encoding and decoding conversion equipment, and occur simultaneously to the coding/decoding capability that called party instrument sends the second coding/decoding capability collection that local coding/decoding capability collection that encoding and decoding conversion equipment supports is supported with called party instrument, and the second target encoding and decoding that called party instrument obtains through consultation from coding/decoding capability common factor are returned to encoding and decoding conversion equipment.The application embodiment of the present invention, mutual by TG and encoding and decoding conversion equipment, coding/decoding capability collection is made not have calling party device and the called party instrument of common factor, target encoding and decoding are negotiated respectively with the encoding and decoding conversion equipment with encoding and decoding conversion function, thus when calling party device communicates with called party instrument, by encoding and decoding conversion equipment based on the target encoding and decoding consulted, encoding and decoding conversion is carried out, to ensure to communicate successfully between calling party device with called party instrument to the data flow of communicating pair transmission.
Accompanying drawing explanation
Fig. 1 is the application scenarios schematic diagram of communication means embodiment of the present invention;
Fig. 2 is an embodiment flow chart of communication means of the present invention;
Fig. 3 is another embodiment flow chart of communication means of the present invention;
Fig. 4 A is another embodiment flow chart of communication means of the present invention;
Fig. 4 B is the RTP Media Stream connection diagram set up based on Fig. 4 A embodiment;
Fig. 5 A is another embodiment flow chart of communication means of the present invention;
Fig. 5 B is the RTP Media Stream connection diagram set up based on Fig. 5 A embodiment;
Fig. 6 is a kind of hardware structure diagram of communicator place of the present invention equipment;
Fig. 7 is an embodiment block diagram of communicator of the present invention;
Fig. 8 is another embodiment block diagram of communicator of the present invention.
Embodiment
Technical scheme in the embodiment of the present invention is understood better in order to make those skilled in the art person, and enable the above-mentioned purpose of the embodiment of the present invention, feature and advantage become apparent more, below in conjunction with accompanying drawing, the technical scheme in the embodiment of the present invention is described in further detail.
See Fig. 1, for applying the application scenarios schematic diagram that the embodiment of the present invention carries out communicating:
In Fig. 1, between corporate intranet and PSTN, realize audio call by TG (Trunk Gateway, Tandem Gateway).Wherein, corporate intranet comprises some IP terminals, and these IP terminals directly can access TG, also can pass through VG (Voice Gateway, voice gateways) and access TG; ITSP (Internet Telephony Service Provider, the internet telephony service provider) equipment of some access TG is comprised in PSTN.It should be noted that, the communicating pair that the embodiment of the present invention can be applied in TG both sides does not have encoding and decoding to occur simultaneously, and TG does not have any application scenarios of encoding and decoding conversion ability, be not restricted to the corporate intranet shown in Fig. 1 and the application-specific scene of carrying out between PSTN communicating, Fig. 1 is only a kind of Application Scenarios-Example that the embodiment of the present invention is described.
In prior art, the code/decode type supported due to the IP terminal in corporate intranet is different from the code/decode type that the ITSP equipment in PSTN is supported, when therefore calling out between both sides, easily causes communication failure.See Fig. 1, in the embodiment of the present invention, add the encoding and decoding conversion equipment be connected with TG, the code/decode type supported when IP terminal and the code/decode type of ITSP equipment support do not occur simultaneously, TG completes coding/decoding capability respectively by this encoding and decoding conversion equipment and consults with communicating pair, then based on the encoding and decoding negotiated, by encoding and decoding conversion equipment, encoding and decoding conversion is carried out to the data flow that communicating pair transmits, thus realize the communication between IP terminal and ITSP equipment.
In the embodiment of the present invention, suppose that the set of the encoding and decoding of encoding and decoding conversion equipment support is called local coding/decoding capability collection, the set carrying out the encoding and decoding of the calling party device support communicated is called the first coding/decoding capability collection, the set carrying out the encoding and decoding of the called party instrument support communicated is called the second coding/decoding capability collection, wherein, there is not common factor between first coding/decoding capability collection and the second coding/decoding capability collection, and there is common factor respectively in local coding/decoding capability collection and this first coding/decoding capability collection and the second coding/decoding capability collection.It should be noted that, in Fig. 1, when communicating between IP terminal and ITSP equipment, the side made a call is calling party device, and a called side is called party instrument.Below in conjunction with specific embodiment, implementation procedure of the present invention is described in detail.
See Fig. 2, be an embodiment flow chart of communication means of the present invention, this embodiment is described from TG gateway side, comprises the following steps:
Step 201: send the first call request message to encoding and decoding conversion equipment, comprises the first coding/decoding capability collection in this first call request message.
In the present embodiment, TG is upper can the IP address of pre-configured encoding and decoding conversion equipment and port numbers, and follow-up TG can send message based on this IP address and port numbers to encoding and decoding conversion equipment.
In this step, calling party device can make a call to called party instrument by sending call request message, the first coding/decoding capability collection that calling party device is supported is carried in this call request message, after TG receives this call request message, if can not consult encoding and decoding with this first coding/decoding capability collection, such as, this TG does not possess encoding and decoding conversion function, then TG can according to pre-configured IP address and the dynamic routing between port numbers establishment with encoding and decoding conversion equipment, and send the first call request message by this dynamic routing to encoding and decoding conversion equipment, the first coding/decoding capability collection is comprised in this first call request message, to be consulted the encoding and decoding adopted between calling party device by the encoding and decoding conversion equipment with encoding and decoding conversion function.
Wherein, encoding and decoding conversion mark can also be comprised in this first call request message, to represent that this first call request message is the message carrying out encoding and decoding conversion.Such as, when the first call request message is specially the INVITE message based on SIP, " transcoding-" can be added in user (user) territory of the Request-URI of the Request-Line of this INVITE message (request line) (Uniform Resource Identifier, universal resource identifier) field.
Step 202: receive encoding and decoding conversion equipment and consult successfully at local coding/decoding capability collection and the first coding/decoding capability collection, transmission comprise local coding/decoding capability collection return call request message.
After encoding and decoding conversion equipment receives the first call request message, occur simultaneously if encoding and decoding conversion equipment determines that the first coding/decoding capability collection and local coding/decoding capability exist, then the two consults successfully, and local coding/decoding capability collection is sent to TG by returning call request message by local encoding and decoding conversion equipment.
In this step return call request message also can be specially carry encoding and decoding conversion mark INVITE message, the particular content of INVITE message can see the description in step 201.
Step 203: send the second call request message to called party instrument, the coding/decoding capability comprising local coding/decoding capability collection and the second coding/decoding capability collection in this second call request message occurs simultaneously.
When TG is from after returning call request message and obtaining local coding/decoding capability collection, can send the second call request message to called party instrument, the coding/decoding capability that at least can comprise local coding/decoding capability collection and the second coding/decoding capability collection in this second call request message occurs simultaneously.In one implementation, directly can carry local coding/decoding capability collection in this second call request message, this local coding/decoding capability is concentrated and is contained this coding/decoding capability common factor; In another implementation, the union of local coding/decoding capability collection and the first coding/decoding capability collection can be carried in this second call request message, be somebody's turn to do and concentrate the encoding and decoding eliminating local coding/decoding capability and concentrate the first coding/decoding capability comprised to concentrate, but still comprising this coding/decoding capability common factor.
Step 204: return the first request response message to calling party device, comprise encoding and decoding conversion equipment in this first request response message and concentrate the first object encoding and decoding obtained from the first coding/decoding capability, and return the second request response message to encoding and decoding conversion equipment, comprise the second target encoding and decoding that called party instrument obtains through consultation from coding/decoding capability occurs simultaneously in this second request response message.
Receive the first call request message in step 201 when encoding and decoding conversion equipment after, encoding and decoding selection calling party device and encoding and decoding conversion equipment can being concentrated all to support from successful first coding/decoding capability of negotiation are as first object encoding and decoding, and first object encoding and decoding are returned to TG, TG returns the first request response message comprising these first object encoding and decoding to calling party device, thus completes the coding/decoding capability negotiations process between calling party device and encoding and decoding conversion equipment;
Receive the second call request message in step 203 when called party instrument after, the encoding and decoding that can a called party instrument and encoding and decoding conversion equipment selected from coding/decoding capability occurs simultaneously all to support are as the second target encoding and decoding, and the second target encoding and decoding are returned to TG, TG returns to encoding and decoding conversion equipment and comprises this second target encoding and decoding second request response message, thus completes the coding/decoding capability negotiations process between called party instrument and encoding and decoding conversion equipment.
After completing above-mentioned coding/decoding capability negotiations process, the following two kinds mode can be adopted to set up data flow connection between calling party device and called party instrument, thus by the bipartite data flow of this data flow connection transport communication:
First kind of way: TG respectively and the data flow connection set up between calling party device and encoding and decoding conversion equipment based on first object encoding and decoding; Further, TG respectively and the data flow connection set up between called party instrument and encoding and decoding conversion equipment based on the second target encoding and decoding.Follow-up TG receive calling party device transmission data flow time, can first by data stream transmitting to encoding and decoding conversion equipment, be transferred to TG again after completing encoding and decoding conversion by encoding and decoding conversion equipment, and be transferred to called party instrument by TG.
The second way: when also comprising the IP address of encoding and decoding conversion equipment in the first request response message, calling party device can according to the data flow connection directly set up between this IP address and encoding and decoding conversion equipment based on first object encoding and decoding; When also comprising the IP address of encoding and decoding conversion equipment in the second call request message, called party instrument can according to the data flow connection directly set up between this IP address and encoding and decoding conversion equipment based on the second target encoding and decoding.Follow-up calling party device can directly by data stream transmitting to encoding and decoding conversion equipment, be directly transferred to called party instrument after completing encoding and decoding conversion by encoding and decoding conversion equipment, above-mentioned data flow reciprocal process without the need to through TG, thus can save TG resource.
As seen from the above-described embodiment, this embodiment is mutual by TG and encoding and decoding conversion equipment, coding/decoding capability collection is made not have calling party device and the called party instrument of common factor, target encoding and decoding are negotiated respectively with the encoding and decoding conversion equipment with encoding and decoding conversion function, thus when calling party device communicates with called party instrument, by encoding and decoding conversion equipment based on the target encoding and decoding consulted, encoding and decoding conversion is carried out, to ensure to communicate successfully between calling party device with called party instrument to the data flow of communicating pair transmission.
See Fig. 3, be another embodiment flow chart of communication means of the present invention, this embodiment is described from encoding and decoding conversion equipment side, comprises the following steps:
Step 301: receive the first call request message that TG sends, comprise the first coding/decoding capability collection in this first call request message.
Step 302: consult successfully at local coding/decoding capability collection and the first coding/decoding capability collection, to TG send comprise local coding/decoding capability collection return call request message, to make TG send the second call request message to called party instrument, the coding/decoding capability comprising local coding/decoding capability collection and the second coding/decoding capability collection in this second call request message occurs simultaneously.
In this step, encoding and decoding conversion equipment can obtain the source IP address of the first call request message and port numbers (i.e. the IP address of TG and port numbers), create the dynamic routing between TG according to this source IP address and port numbers, and by this dynamic routing to TG send comprise local coding/decoding capability collection return call request message.
Step 303: concentrate from the first coding/decoding capability and obtain first object encoding and decoding, sends to make TG the first request response message comprising first object encoding and decoding to calling party device.
Step 304: receive the second request response message that TG sends, comprises the second target encoding and decoding that called party instrument obtains through consultation from coding/decoding capability occurs simultaneously in this second request response message.
The present embodiment to be differently from embodiment illustrated in fig. 2, and the present embodiment is described from encoding and decoding conversion equipment side, and Fig. 2 is described from TG side, but the specific implementation process of the present embodiment describes consistent with Fig. 2, does not repeat them here.
In the present embodiment, encoding and decoding conversion equipment is when carrying out encoding and decoding conversion, hardware conversion mode can be adopted, namely by DSP (Digital Signal Processing, Digital Signal Processing) resource carries out encoding and decoding conversion, also software conversion regime can be adopted, namely by CPU (Central Processing Unit, central processing unit) and memory source carry out encoding and decoding conversion, this embodiment of the present invention is not limited, arrange independent of TG as long as have, and the encoding and decoding conversion equipment that can carry out communicating with this TG can realize encoding and decoding conversion.
As seen from the above-described embodiment, this embodiment is mutual by TG and encoding and decoding conversion equipment, coding/decoding capability collection is made not have calling party device and the called party instrument of common factor, target encoding and decoding are negotiated respectively with the encoding and decoding conversion equipment with encoding and decoding conversion function, thus when calling party device communicates with called party instrument, by encoding and decoding conversion equipment based on the target encoding and decoding consulted, encoding and decoding conversion is carried out, to ensure to communicate successfully between calling party device with called party instrument to the data flow of communicating pair transmission.
See Fig. 4 A, for another embodiment flow chart of communication means of the present invention, this network architecture shown in embodiment composition graphs 1 is described in detail the communication process between ITSP equipment and IP device, wherein after coding/decoding capability has been consulted, TG respectively and ITSP equipment, between IP terminal and encoding and decoding conversion equipment, set up data flow connection:
Step 401:ITSP equipment sends the INVITE message comprising the first coding/decoding capability collection that ITSP equipment is supported to TG.
In the present embodiment, ITSP equipment is as calling party device, when its will to IP terminal originated calls as called party instrument time, send the INVITE message as call request message, the first coding/decoding capability collection that ITSP equipment is supported is comprised in this INVITE message, suppose that the first coding/decoding capability is concentrated and comprise encoding and decoding { G711a, G711u}.
Step 402:TG by the INVITE message repeating that receives to encoding and decoding conversion equipment.
Owing to accessing TG in network, and have multiple by the communication equipment that TG realizes calling out, therefore TG saves in advance all numbers being connected to the communication equipment of this TG.In the present embodiment, after TG receives the INVITE message of ITSP equipment transmission, obtain the number (i.e. calling number) of the ITSP equipment carried in this INVITE message and the number (i.e. called number) of IP terminal, above-mentioned calling number and called number are mated with the number preserved in advance, if the match is successful, illustrate that ITSP equipment and IP terminal are this TG of access, and the equipment of communication can be realized by this TG, therefore can be consulted by outside encoding and decoding conversion equipment and the coding/decoding capability of ITSP equipment and IP terminal.
In the present embodiment, can the IP address of pre-configured encoding and decoding conversion equipment and port numbers on TG equipment, after TG is by calling number and called number and the numbers match success of preserving in advance, can according to pre-configured IP address and the dynamic routing between port numbers establishment with encoding and decoding conversion equipment, by this dynamic routing by INVITE message repeating to encoding and decoding conversion equipment, wherein, TG can add " transcoding-" as encoding and decoding conversion mark in this INVITE message, should " transcoding-" can be carried in the user territory of the Request-URI field of the Request-Line of INVITE message.
Step 403: encoding and decoding conversion equipment returns the INVITE message comprising the local coding/decoding capability collection that encoding and decoding conversion equipment is supported to TG.
Suppose that the local coding/decoding capability that encoding and decoding conversion equipment is supported is concentrated and comprise encoding and decoding { G711a, G711u, G729, G722 ..., when encoding and decoding conversion equipment receives INVITE message, and identify encoding and decoding conversion mark " transcoding-" from this message after, local coding/decoding capability collection and the first coding/decoding capability collection are held consultation, during the coding/decoding capability consulted both obtaining successfully occurs simultaneously, comprises encoding and decoding { G711a, G711u}.
Consulting successfully, encoding and decoding conversion equipment can obtain source IP address and the port numbers of the INVITE message that TG sends, the dynamic routing between TG is created according to this source IP address and port numbers, and return INVITE message by this dynamic routing to TG, comprise local coding/decoding capability collection { G711a, G711u in this INVITE message, G729, G722 ..., and encoding and decoding conversion mark " transcoding-".
Step 404:TG sends the INVITE message comprising local coding/decoding capability collection to IP terminal.
When TG receives INVITE message, and identify encoding and decoding conversion mark " transcoding-" from this message after, whether IP address and the port numbers that first can compare source IP address in this INVITE message and port numbers and pre-configured encoding and decoding conversion equipment be consistent, INVITE message is sent to IP terminal when consistent, local coding/decoding capability collection { G711a, G711u, G729 is comprised in this INVITE message, G722 ....
Step 405:IP terminal returns the 200OK message comprising the second target encoding and decoding to TG.
Suppose that the second coding/decoding capability of IP terminal support is concentrated and comprise encoding and decoding { G729, G722}, after then IP terminal receives the INVITE message of TG transmission, second coding/decoding capability collection and local coding/decoding capability collection are held consultation, encoding and decoding { G729, G722} is comprised during the coding/decoding capability consulted both obtaining successfully occurs simultaneously.IP terminal selects the second target encoding and decoding from above-mentioned common factor, is assumed to be encoding and decoding G729, then IP terminal returns the 200OK message comprising these encoding and decoding G729 to TG.
The 200OK message comprising the second target encoding and decoding is sent to encoding and decoding conversion equipment by step 406:TG.
After the 200OK message comprising the second target encoding and decoding G729 is sent to encoding and decoding conversion equipment by TG, encoding and decoding conversion equipment can record the corresponding relation between the mark of this IP terminal and encoding and decoding G729, to carry out encoding and decoding conversion subsequently through encoding and decoding G729 to the data flow of IP terminal transmission.
Step 407: encoding and decoding conversion equipment returns the 200OK message comprising first object encoding and decoding to TG.
In step 403, the encoding and decoding conversion equipment coding/decoding capability obtained between itself and ITSP equipment occurs simultaneously { G711a, G711u}, encoding and decoding conversion equipment selects first object encoding and decoding from above-mentioned common factor, be assumed to be encoding and decoding G711a, then encoding and decoding conversion equipment returns the 200OK message comprising these encoding and decoding G729 to TG.Further, encoding and decoding conversion equipment can record the corresponding relation between the mark of this ITSP equipment and encoding and decoding G711a, to carry out encoding and decoding conversion subsequently through encoding and decoding G711a to the data flow of ITSP device transmission.
The 200OK message comprising first object encoding and decoding is sent to ITSP equipment by step 408:TG.
TG receive that encoding and decoding conversion equipment sends comprise the 200OK message of first object encoding and decoding G711a after, this 200OK message is sent to ITSP equipment, to inform that ITSP equipment adopts encoding and decoding G711a transmitting data stream.
Step 409:ITSP equipment sends ACK message to TG.
Step 410:TG returns ACK message to encoding and decoding conversion equipment.
Step 411: encoding and decoding conversion equipment returns ACK message to TG.
Step 412:TG returns ACK message to IP terminal.
The data flow connection based on the second target encoding and decoding is set up between step 413:IP terminal and TG.
The data flow connection based on the second target encoding and decoding is set up between step 414:TG and encoding and decoding conversion equipment.
Step 415: set up the data flow connection based on first object encoding and decoding between encoding and decoding conversion equipment and TG.
The data flow connection based on first object encoding and decoding is set up between step 416:TG and ITSP equipment.
Above-mentioned steps 413 to step 416 is create the process of data flow connection based on step 401 to the coding/decoding negotiation result of step 412.The data flow transmitted in the present embodiment can be specially RTP (Real-time Transport Protocol, RTP) Media Stream, see Fig. 4 B, for the configuration diagram that set up RTP Media Stream connects, wherein TG respectively with ITSP equipment, establish RTP Media Stream between IP terminal and encoding and decoding conversion equipment and be connected.
As seen from the above-described embodiment, this embodiment is mutual by TG and encoding and decoding conversion equipment, coding/decoding capability collection is made not have calling party device and the called party instrument of common factor, target encoding and decoding are negotiated respectively with the encoding and decoding conversion equipment with encoding and decoding conversion function, thus when calling party device communicates with called party instrument, by encoding and decoding conversion equipment based on the target encoding and decoding consulted, encoding and decoding conversion is carried out, to ensure to communicate successfully between calling party device with called party instrument to the data flow of communicating pair transmission.
See Fig. 5 A, for another embodiment flow chart of communication means of the present invention, this network architecture shown in embodiment composition graphs 1 is described in detail the communication process between ITSP equipment and IP device, wherein after coding/decoding capability has been consulted, encoding and decoding conversion equipment sets up data flow connection with ITSP equipment and IP terminal respectively:
Step 501:ITSP equipment sends the INVITE message comprising the first coding/decoding capability collection that ITSP equipment is supported to TG.
Step 502:TG by the INVITE message repeating that receives to encoding and decoding conversion equipment.
Step 503: encoding and decoding conversion equipment returns the INVITE message comprising the local coding/decoding capability collection that encoding and decoding conversion equipment is supported to TG.
Step 504:TG sends the INVITE message comprising local coding/decoding capability collection to IP terminal.
Step 505:IP terminal returns the 200OK message comprising the second target encoding and decoding to TG.
The 200OK message comprising the second target encoding and decoding is sent to encoding and decoding conversion equipment by step 506:TG.
Step 507: encoding and decoding conversion equipment returns the 200OK message comprising first object encoding and decoding to TG.
The 200OK message comprising first object encoding and decoding is sent to ITSP equipment by step 508:TG.
Step 509:ITSP equipment sends ACK message to TG.
Step 510:TG returns ACK message to encoding and decoding conversion equipment.
Step 511: encoding and decoding conversion equipment returns ACK message to TG.
Step 512:TG returns ACK message to IP terminal.
Coding/decoding negotiation process shown in above-mentioned steps 501 to step 512, be from the different of coding/decoding negotiation process in Fig. 4 shown in step 401 to step 412, in the INVITE message that in step 504, TG sends to IP terminal except comprising local coding/decoding capability collection, also comprise the IP address of encoding and decoding conversion equipment, and in the 200OK message that in step 508, TG sends to ITSP equipment except comprising first object encoding and decoding, also comprise the IP address of encoding and decoding conversion equipment, in addition, all consistent shown in other negotiations process with Fig. 4, does not repeat them here.
The data flow connection based on the second target encoding and decoding is set up between step 513:IP terminal and encoding and decoding conversion equipment.
Step 514: set up the data flow connection based on first object encoding and decoding between encoding and decoding conversion equipment and ITSP equipment.
Above-mentioned steps 513 and step 514 are create the process of data flow connection based on step 501 to the coding/decoding negotiation result of step 512.The data flow transmitted in the present embodiment can be specially RTP Media Stream, see Fig. 5 B, for the configuration diagram that set up RTP Media Stream connects, wherein encoding and decoding conversion equipment establishes RTP Media Stream with ITSP equipment and IP terminal respectively and is connected, compared with Fig. 4 B, the RTP Media Stream transmitted between ITSP equipment and IP terminal without TG, can save TG resource therefore, it is possible to further; Meanwhile, TG still can and encoding and decoding conversion equipment, between ITSP equipment and IP terminal by SIP message interaction control signal.
Corresponding with aforementioned communication embodiment of the method, present invention also offers the embodiment of communicator.
The embodiment of communicator of the present invention can be applied on TG equipment or encoding and decoding conversion equipment.This device embodiment can pass through software simulating, also can be realized by the mode of hardware or software and hardware combining.For software simulating, as the device on a logical meaning, be by the processor of its place equipment, computer program instructions corresponding in nonvolatile memory is read operation in internal memory to be formed.Say from hardware view; as shown in Figure 6; for a kind of hardware structure diagram of communicator place of the present invention equipment; except the processor shown in Fig. 6, network interface, internal memory and nonvolatile memory; in embodiment, the equipment at device place can also comprise other hardware usually, is no longer shown specifically in this Fig. 6.
See Fig. 7, be an embodiment block diagram of communicator of the present invention, this device can be applied in on the TG of encoding and decoding conversion equipment connection, and this device comprises: request message transmitting element 710, receiving element 720 and response message transmitting element 730.
Wherein, described request packet sending unit 710, for sending the first call request message to described encoding and decoding conversion equipment, comprises the first coding/decoding capability collection that calling party device is supported in described first call request message;
Described receiving element 720, consults successfully at its local coding/decoding capability collection supported and described first coding/decoding capability collection for receiving described encoding and decoding conversion equipment, transmission comprise described local coding/decoding capability collection return call request message;
Described request packet sending unit 710, also for sending the second call request message to described called party instrument, the coding/decoding capability comprising the second coding/decoding capability collection that described local coding/decoding capability collection and described called party instrument are supported in described second call request message occurs simultaneously;
Described response message transmitting element 730, for returning the first request response message to described calling party device, comprising described encoding and decoding conversion equipment and concentrating the first object encoding and decoding obtained from described first coding/decoding capability in described first request response message; And, return the second request response message to described encoding and decoding conversion equipment, in described second request response message, comprise the second target encoding and decoding that described called party instrument obtains through consultation from described coding/decoding capability occurs simultaneously.
In an optional implementation:
This device can also comprise (not shown in Fig. 7): dispensing unit, for IP address and the port numbers of pre-configured described encoding and decoding conversion equipment;
Described request packet sending unit 710, specifically for creating the dynamic routing between described encoding and decoding conversion equipment according to described IP address and port numbers, and by described dynamic routing, described first call request message can be sent to described encoding and decoding conversion equipment.
In another optional implementation:
The IP address of described encoding and decoding conversion equipment can also be comprised, to make described calling party device according to the data flow connection set up between described IP address and described encoding and decoding conversion equipment based on described first object encoding and decoding in the first request response message that described response message transmitting element 730 returns;
The IP address of described encoding and decoding conversion equipment can also be comprised, to make described called party instrument according to the data flow connection set up between described IP address and described encoding and decoding conversion equipment based on described second target encoding and decoding in the second call request message that described request packet sending unit 710 sends.
In another optional implementation:
Described device can also comprise (not shown in Fig. 7): set up unit, for respectively and the data flow connection set up between described calling party device and described encoding and decoding conversion equipment based on described first object encoding and decoding; And, respectively and the data flow connection set up between described called party instrument and described encoding and decoding conversion equipment based on described second target encoding and decoding.
In another optional implementation:
Can also comprise encoding and decoding conversion in message mutual between described request packet sending unit 710, receiving element 720 and response message transmitting element 730 and described encoding and decoding conversion equipment to identify, described encoding and decoding conversion mark is for representing that described message is the message carrying out encoding and decoding conversion.
See Fig. 8, for another embodiment block diagram of communicator of the present invention, this device can be applied on the encoding and decoding conversion equipment that is connected with TG, wherein, the first coding/decoding capability collection that the local coding/decoding capability collection that described encoding and decoding conversion equipment is supported is supported with calling party device respectively, and the second coding/decoding capability collection that called party instrument is supported exists common factor, this device comprises: receiving element 810, transmitting element 820 and acquisition unit 830.
Wherein, described receiving element 810, for receiving the first call request message that described TG sends, comprises the first coding/decoding capability collection that calling party device is supported in described first call request message;
Described transmitting element 820, consult successfully for the local coding/decoding capability collection supported at described encoding and decoding conversion equipment and described first coding/decoding capability collection, to described TG send comprise described local coding/decoding capability collection return call request message, to make described TG send the second call request message to described called party instrument, the coding/decoding capability comprising the second coding/decoding capability collection that described local coding/decoding capability collection and described called party instrument are supported in described second call request message occurs simultaneously;
Described acquisition unit 830, obtains first object encoding and decoding for concentrating from described first coding/decoding capability, sends to make described TG the first request response message comprising described first object encoding and decoding to described calling party device;
Described receiving element 810, also for receiving the second request response message that described TG sends, comprises the second target encoding and decoding that described called party instrument obtains through consultation from described coding/decoding capability occurs simultaneously in described second request response message.
In an optional implementation:
Described transmitting element 820, can specifically for obtaining source IP address and the port numbers of described first call request message, create the dynamic routing between described TG according to described source IP address and port numbers, and by described dynamic routing to described TG send comprise described local coding/decoding capability collection return call request message.
In another optional implementation:
This device can also comprise (not shown in Fig. 8): set up unit, for when also comprising the IP address of described encoding and decoding conversion equipment in described first request response message, set up data flow connection based on described first object encoding and decoding with described calling party device according to described IP address; And, when also comprising the IP address of described encoding and decoding conversion equipment in described second call request message, and searching book called party instrument and set up data flow connection based on described second target encoding and decoding according to described IP address.
In said apparatus, the implementation procedure of the function and efficacy of unit specifically refers to the implementation procedure of corresponding step in said method, does not repeat them here.
For device embodiment, because it corresponds essentially to embodiment of the method, so relevant part illustrates see the part of embodiment of the method.Device embodiment described above is only schematic, the wherein said unit illustrated as separating component or can may not be and physically separates, parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of module wherein can be selected according to the actual needs to realize the object of the present invention program.Those of ordinary skill in the art, when not paying creative work, are namely appreciated that and implement.
As seen from the above-described embodiment, the embodiment of the present invention is sent the first coding/decoding capability collection of calling party device support to encoding and decoding conversion equipment by TG, and concentrate the first object encoding and decoding obtained to return to calling party device from the first coding/decoding capability through consultation encoding and decoding conversion equipment, and occur simultaneously to the coding/decoding capability that called party instrument sends local coding/decoding capability collection that encoding and decoding conversion equipment supports and the second coding/decoding capability collection that called party instrument is supported, and the second target encoding and decoding that called party instrument obtains through consultation from coding/decoding capability occurs simultaneously are returned to encoding and decoding conversion equipment.The application embodiment of the present invention, mutual by TG and encoding and decoding conversion equipment, coding/decoding capability collection is made not have calling party device and the called party instrument of common factor, target encoding and decoding are negotiated respectively with the encoding and decoding conversion equipment with encoding and decoding conversion function, thus when calling party device communicates with called party instrument, by encoding and decoding conversion equipment based on the target encoding and decoding consulted, encoding and decoding conversion is carried out, to ensure to communicate successfully between calling party device with called party instrument to the data flow of communicating pair transmission.
Those skilled in the art, at consideration specification and after putting into practice invention disclosed herein, will easily expect other embodiment of the present invention.The application is intended to contain any modification of the present invention, purposes or adaptations, and these modification, purposes or adaptations are followed general principle of the present invention and comprised the undocumented common practise in the art of the present invention or conventional techniques means.Specification and embodiment are only regarded as exemplary, and true scope of the present invention and spirit are pointed out by claim below.
Should be understood that, the present invention is not limited to precision architecture described above and illustrated in the accompanying drawings, and can carry out various amendment and change not departing from its scope.Scope of the present invention is only limited by appended claim.
Claims (14)
1. a communication means, is characterized in that, described method is applied on the Tandem Gateway TG with encoding and decoding conversion equipment connection, and described method comprises:
Send the first call request message to described encoding and decoding conversion equipment, in described first call request message, comprise the first coding/decoding capability collection that calling party device is supported;
Receive described encoding and decoding conversion equipment to consult successfully at its local coding/decoding capability collection supported and described first coding/decoding capability collection, transmission comprise described local coding/decoding capability collection return call request message;
Send the second call request message to called party instrument, the coding/decoding capability comprising the second coding/decoding capability collection that described local coding/decoding capability collection and described called party instrument are supported in described second call request message occurs simultaneously;
Return the first request response message to described calling party device, comprise described encoding and decoding conversion equipment in described first request response message and concentrate the first object encoding and decoding obtained from described first coding/decoding capability; And, return the second request response message to described encoding and decoding conversion equipment, in described second request response message, comprise the second target encoding and decoding that described called party instrument obtains through consultation from described coding/decoding capability occurs simultaneously.
2. method according to claim 1, is characterized in that, described send the first call request message to described encoding and decoding conversion equipment before, also comprise: the internet protocol address of pre-configured described encoding and decoding conversion equipment and port numbers;
Describedly send the first call request message to described encoding and decoding conversion equipment and comprise:
The dynamic routing between described encoding and decoding conversion equipment is created according to described IP address and port numbers;
By described dynamic routing, described first call request message is sent to described encoding and decoding conversion equipment.
3. method according to claim 2, is characterized in that,
The IP address of described encoding and decoding conversion equipment is also comprised, to make described calling party device according to the data flow connection set up between described IP address and described encoding and decoding conversion equipment based on described first object encoding and decoding in described first request response message;
The IP address of described encoding and decoding conversion equipment is also comprised, to make described called party instrument according to the data flow connection set up between described IP address and described encoding and decoding conversion equipment based on described second target encoding and decoding in described second call request message.
4. method according to claim 1, is characterized in that, described method also comprises:
Respectively and the data flow connection set up between described calling party device and described encoding and decoding conversion equipment based on described first object encoding and decoding;
Respectively and the data flow connection set up between described called party instrument and described encoding and decoding conversion equipment based on described second target encoding and decoding.
5. a communication means, is characterized in that, described method is applied on the encoding and decoding conversion equipment that is connected with TG, and described method comprises:
Receive the first call request message that described TG sends, in described first call request message, comprise the first coding/decoding capability collection that calling party device is supported;
The local coding/decoding capability collection supported at described encoding and decoding conversion equipment and described first coding/decoding capability collection are consulted successfully, to described TG send comprise described local coding/decoding capability collection return call request message, to make described TG send the second call request message to described called party instrument, the coding/decoding capability comprising the second coding/decoding capability collection that described local coding/decoding capability collection and described called party instrument are supported in described second call request message occurs simultaneously;
Concentrate from described first coding/decoding capability and obtain first object encoding and decoding, send to make described TG the first request response message comprising described first object encoding and decoding to described calling party device;
Receive the second request response message that described TG sends, in described second request response message, comprise the second target encoding and decoding that described called party instrument obtains through consultation from described coding/decoding capability occurs simultaneously.
6. method according to claim 5, is characterized in that, describedly sends to described TG the call request message that returns comprising described local coding/decoding capability collection and comprises:
Obtain source IP address and the port numbers of described first call request message;
The dynamic routing between described TG is created according to described source IP address and port numbers;
By described dynamic routing to described TG send comprise described local coding/decoding capability collection return call request message.
7. the method according to claim 5 or 6, is characterized in that, described method also comprises:
When also comprising the IP address of described encoding and decoding conversion equipment in described first request response message, set up data flow connection based on described first object encoding and decoding with described calling party device according to described IP address;
When also comprising the IP address of described encoding and decoding conversion equipment in described second call request message, set up data flow connection based on described second target encoding and decoding with described called party instrument according to described IP address.
8. a communicator, is characterized in that, described application of installation is with on the TG of encoding and decoding conversion equipment connection, and described device comprises:
Request message transmitting element, for sending the first call request message to described encoding and decoding conversion equipment, comprises the first coding/decoding capability collection that calling party device is supported in described first call request message;
Receiving element, consults successfully at its local coding/decoding capability collection supported and described first coding/decoding capability collection for receiving described encoding and decoding conversion equipment, transmission comprise described local coding/decoding capability collection return call request message;
Described request packet sending unit, also for sending the second call request message to described called party instrument, the coding/decoding capability comprising the second coding/decoding capability collection that described local coding/decoding capability collection and described called party instrument are supported in described second call request message occurs simultaneously;
Response message transmitting element, for returning the first request response message to described calling party device, comprising described encoding and decoding conversion equipment and concentrating the first object encoding and decoding obtained from described first coding/decoding capability in described first request response message; And, return the second request response message to described encoding and decoding conversion equipment, in described second request response message, comprise the second target encoding and decoding that described called party instrument obtains through consultation from described coding/decoding capability occurs simultaneously.
9. device according to claim 8, is characterized in that, described device also comprises:
Dispensing unit, for IP address and the port numbers of pre-configured described encoding and decoding conversion equipment;
Described request packet sending unit, specifically for creating the dynamic routing between described encoding and decoding conversion equipment according to described IP address and port numbers, and is sent to described encoding and decoding conversion equipment by described dynamic routing by described first call request message.
10. device according to claim 9, is characterized in that,
The IP address of described encoding and decoding conversion equipment is also comprised, to make described calling party device according to the data flow connection set up between described IP address and described encoding and decoding conversion equipment based on described first object encoding and decoding in the first request response message that described response message transmitting element returns;
The IP address of described encoding and decoding conversion equipment is also comprised, to make described called party instrument according to the data flow connection set up between described IP address and described encoding and decoding conversion equipment based on described second target encoding and decoding in the second call request message that described request packet sending unit sends.
11. devices according to claim 8, is characterized in that, described device also comprises:
Set up unit, for respectively and the data flow connection set up between described calling party device and described encoding and decoding conversion equipment based on described first object encoding and decoding; And, respectively and the data flow connection set up between described called party instrument and described encoding and decoding conversion equipment based on described second target encoding and decoding.
12. 1 kinds of communicators, is characterized in that, described application of installation is on the encoding and decoding conversion equipment be connected with TG, and described device comprises:
Receiving element, for receiving the first call request message that described TG sends, comprises the first coding/decoding capability collection that calling party device is supported in described first call request message;
Transmitting element, consult successfully for the local coding/decoding capability collection supported at described encoding and decoding conversion equipment and described first coding/decoding capability collection, to described TG send comprise described local coding/decoding capability collection return call request message, to make described TG send the second call request message to described called party instrument, the coding/decoding capability comprising the second coding/decoding capability collection that described local coding/decoding capability collection and described called party instrument are supported in described second call request message occurs simultaneously;
Obtaining unit, obtaining first object encoding and decoding for concentrating from described first coding/decoding capability, send to make described TG the first request response message comprising described first object encoding and decoding to described calling party device;
Described receiving element, also for receiving the second request response message that described TG sends, comprises the second target encoding and decoding that described called party instrument obtains through consultation from described coding/decoding capability occurs simultaneously in described second request response message.
13. devices according to claim 12, it is characterized in that, described transmitting element, specifically for obtaining source IP address and the port numbers of described first call request message, create the dynamic routing between described TG according to described source IP address and port numbers, and by described dynamic routing to described TG send comprise described local coding/decoding capability collection return call request message.
14. devices according to claim 12, is characterized in that, described device also comprises:
Setting up unit, for when also comprising the IP address of described encoding and decoding conversion equipment in described first request response message, setting up data flow connection based on described first object encoding and decoding with described calling party device according to described IP address; And, when also comprising the IP address of described encoding and decoding conversion equipment in described second call request message, set up data flow connection based on described second target encoding and decoding with described called party instrument according to described IP address.
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