CN108989353A - Soft switch method of calling and system - Google Patents
Soft switch method of calling and system Download PDFInfo
- Publication number
- CN108989353A CN108989353A CN201811032804.4A CN201811032804A CN108989353A CN 108989353 A CN108989353 A CN 108989353A CN 201811032804 A CN201811032804 A CN 201811032804A CN 108989353 A CN108989353 A CN 108989353A
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- gateway equipment
- accessing gateway
- called
- caller
- private
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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
- H04L65/65—Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
-
- 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
- H04L65/1066—Session management
- H04L65/1069—Session establishment or de-establishment
-
- 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
- H04L65/1066—Session management
- H04L65/1073—Registration or de-registration
Abstract
The invention belongs to fields of communication technology, and in particular to a kind of soft switch method of calling and system.This method comprises: if Softswitch judges that caller accessing gateway equipment and called accessing gateway equipment belong to same NAT device, obtain the private IP address information of the caller accessing gateway equipment and the private IP address information of the called accessing gateway equipment, send the private IP address information of the caller accessing gateway equipment to called accessing gateway equipment, send the private IP address information of the called accessing gateway equipment to caller accessing gateway equipment, so that the caller accessing gateway equipment and called accessing gateway equipment mutually send out RTP Media Stream.The invention enables the accessing gateway equipments for belonging to same NAT device directly can mutually send out RTP Media Stream, and the load pressure of NAT device has been effectively relieved and has avoided the wasting of resources.
Description
Technical field
The invention belongs to fields of communication technology, and in particular to a kind of soft switch method of calling and system.
Background technique
Soft switch (Soft Switch) is to provide call control function and media handling using general switching software based on grouping net
The mutually equipment and system of separation.The basic meaning of soft switch is to isolate call control function from Media Gateway (transport layer)
Come, by software realization basic call control function, so that the separation of calling transmission and Call- Control1 is realized, to control, exchanging
Isolated plane is established with software programmable function.
The network of soft-exchange construction mainly includes Softswitch, Tandem Gateway, signaling gateway and access gateway, the company of offer
Connect the functions such as control, translation and routing, gateway management, Call- Control1, Bandwidth Management, signaling, safety and call detail record.
At the same time, Internet resources, network capabilities are also encapsulated by soft switch, pass through the business interface and service application of standard open
Layer is connected, it is convenient to new business is quickly provided on network.
In existing soft switch calling procedure, same NAT (Network Address Translation, net are belonged to
Network address conversion) equipment two access gatewaies between RTP (Real-time Transport Protocol, real-time Transmission
Agreement) Media Stream need to be converted by NAT device, it cannot achieve direct intercommunication.Which results in the wasting of resources of NAT device,
And speech quality is had an impact.
It should be noted that the above description of the technical background be intended merely to it is convenient to technical solution of the present invention carry out it is clear,
Complete explanation, and facilitate the understanding of those skilled in the art and illustrate.Cannot merely because these schemes of the invention
Background technology part is expounded and thinks that above-mentioned technical proposal is known to those skilled in the art.
Summary of the invention
The technical problem to be solved by the present invention is to propose a kind of soft switch calling for above-mentioned deficiency in the prior art
Method and system is effectively relieved so that belonging to the accessing gateway equipment of same NAT device directly can mutually send out RTP Media Stream
The load pressure of NAT device simultaneously avoids the wasting of resources.
To achieve the above object, the present invention provides a kind of soft switch method of callings, comprising:
If Softswitch judges that caller accessing gateway equipment and called accessing gateway equipment belong to same NAT and set
It is standby, obtain the private IP address information of the caller accessing gateway equipment and the private IP address of the called accessing gateway equipment
Information；
Softswitch send the private IP address information of the caller accessing gateway equipment to called accessing gateway equipment,
The private IP address information of the called accessing gateway equipment is sent to caller accessing gateway equipment, so that the caller accesses net
It closes equipment and called accessing gateway equipment mutually sends out RTP Media Stream.
Optionally, the private IP address information of the caller accessing gateway equipment and described is obtained in the Softswitch
Before the private IP address information of called accessing gateway equipment further include:
Caller accessing gateway equipment sends the first registration information to the Softswitch, and first registration information includes
The public network IP address of caller accessing gateway equipment；
Called accessing gateway equipment sends the second registration information to the Softswitch, and second registration information includes
The public network IP address of called accessing gateway equipment；
When called user terminal off-hook, Softswitch according to the public network IP address of the caller accessing gateway equipment with
The public network IP address of called accessing gateway equipment judges whether the caller accessing gateway equipment and called accessing gateway equipment return
Belong to same NAT device.
Optionally, the Softswitch obtain the caller accessing gateway equipment private IP address information and the quilt
The private IP address information of accessing gateway equipment is made to specifically include:
Softswitch sends private IP address acquisition request to caller accessing gateway equipment and called accessing gateway equipment；
Caller accessing gateway equipment sends the privately owned of caller accessing gateway equipment according to the private IP address acquisition request
IP address information is to the Softswitch；
Called accessing gateway equipment sends the privately owned of called accessing gateway equipment according to the private IP address acquisition request
IP address information is to the Softswitch.
Optionally, in the Softswitch according to the public network IP address of the caller accessing gateway equipment and called access
It is same that the public network IP address of gateway judges whether the caller accessing gateway equipment and called accessing gateway equipment belong to
Before NAT device further include:
Softswitch cuts off the ring back tone of the called user terminal；
Private IP address acquisition request is sent to caller accessing gateway equipment and called access net in the Softswitch
After the equipment of pass further include:
Softswitch cuts off the ring-back tone of the call subscriber terminal, for the caller accessing gateway equipment and is called
Accessing gateway equipment establishes connection.
Optionally, before the ring back tone that the Softswitch cuts off the called user terminal further include:
Call subscriber terminal sends call request to called user terminal.
To achieve the above object, the present invention also provides a kind of soft switch calling systems, comprising:
Softswitch, if for judging that it is same that caller accessing gateway equipment and called accessing gateway equipment belong to
NAT device, obtain the caller accessing gateway equipment private IP address information and the called accessing gateway equipment it is privately owned
IP address information, send the private IP address information of the caller accessing gateway equipment to called accessing gateway equipment, send institute
The private IP address information of called accessing gateway equipment is stated to caller accessing gateway equipment, for the caller accessing gateway equipment
RTP Media Stream is mutually sent out with called accessing gateway equipment.
Optionally, further includes:
Caller accessing gateway equipment, for sending the first registration information to the Softswitch, the first registration letter
Breath includes the public network IP address of caller accessing gateway equipment；
Called accessing gateway equipment, for sending the second registration information to the Softswitch, the second registration letter
Breath includes the public network IP address of called accessing gateway equipment；
The Softswitch is also used to when called user terminal off-hook, according to the public affairs of the caller accessing gateway equipment
The public network IP address of net IP address and called accessing gateway equipment judges the caller accessing gateway equipment and called access gateway
Whether equipment belongs to same NAT device.
Optionally, Softswitch is also used to send private IP address acquisition request to caller accessing gateway equipment and is called
Accessing gateway equipment；
Caller accessing gateway equipment is also used to send caller accessing gateway equipment according to the private IP address acquisition request
Private IP address information to the Softswitch；
Called accessing gateway equipment is also used to send called accessing gateway equipment according to the private IP address acquisition request
Private IP address information to the Softswitch.
Optionally, Softswitch is also used to cut off the ring back tone of the called user terminal, cuts off the calling subscriber
The ring-back tone of terminal, so that the caller accessing gateway equipment and called accessing gateway equipment establish connection.
Optionally, further includes:
Call subscriber terminal, for sending call request to called user terminal；
Called user terminal for off-hook and receives the call request that the call subscriber terminal sends.
The beneficial effects of the present invention are: the soft switch method of calling and corresponding soft switch calling system, Softswitch
Private IP address information to called accessing gateway equipment, the transmission for sending caller accessing gateway equipment is called accessing gateway equipment
Private IP address information is to caller accessing gateway equipment, so that caller accessing gateway equipment and called accessing gateway equipment are mutually sent out
RTP Media Stream is effectively relieved so that belonging to the accessing gateway equipment of same NAT device directly can mutually send out RTP Media Stream
The load pressure of NAT device simultaneously avoids the wasting of resources.
Referring to following description and accompanying drawings, only certain exemplary embodiments of this invention is disclosed in detail, specifies original of the invention
Reason can be in a manner of adopted.It should be understood that embodiments of the present invention are not so limited in range.In appended power
In the range of the spirit and terms that benefit requires, embodiments of the present invention include many changes, modifications and are equal.
The feature for describing and/or showing for a kind of embodiment can be in a manner of same or similar one or more
It uses in a other embodiment, is combined with the feature in other embodiment, or the feature in substitution other embodiment.
It should be emphasized that term "comprises/comprising" refers to the presence of feature, one integral piece, step or component when using herein, but simultaneously
It is not excluded for the presence or additional of one or more other features, one integral piece, step or component.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those skilled in the art without any creative labor, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of flow diagram for soft switch method of calling that the embodiment of the present invention one provides；
Fig. 2 is a kind of flow diagram of soft switch method of calling provided by Embodiment 2 of the present invention；
Fig. 3 is a kind of structural schematic diagram for soft switch calling system that the embodiment of the present invention three provides；
Fig. 4 is a kind of structural schematic diagram for soft switch calling system that the embodiment of the present invention four provides.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, with reference to the accompanying drawing and specific embodiment party
Formula is described in further detail soft switch method of calling of the present invention and system.
Those skilled in the art will understand that embodiments of the present invention can be implemented as a kind of system, device, equipment,
Method or computer program product.Therefore, embodiment disclosed by the invention can be with specific implementation is as follows, it may be assumed that complete
The form that hardware, complete software (including firmware, resident software, microcode etc.) or hardware and software combine.
Below with reference to several representative embodiments of the invention, the principle and spirit of the present invention are explained in detail.
Softswitch in soft-exchange construction network, Tandem Gateway, signaling gateway and access gateway function introduce respectively
It is as follows:
Softswitch mainly provides connection control, translation and routing, gateway management, Call- Control1, Bandwidth Management, letter
It enables, the functions such as safety and call detail record.
Tandem Gateway (TG) completes the functions such as media stream transition under the control of soft switch, is mainly used for relaying access.In
Media mapping and code conversion function are provided between IP network and circuit-switched network (PSTN) after gateway, i.e. termination circuit is handed over
Switching network facility (trunk, loop etc.), by media stream packet and in the Media Stream of grouping transfers on network packetizing.
Signaling gateway (Signaling Gateway, abbreviation SG), complete Circuit Switching Network and packet switching network (being based on IP) it
Between signaling conversion function.Signaling gateway can effectively realize the intercommunication of signaling between Circuit Switching Network and grouping net.Signaling network
It closes and sends and receivees the SS7 signaling message of standard in Circuit Switching Network side, working group is transmitted using IETF signaling in grouping net side
(SIGTRAN) adaptation layer protocol and transport layer protocol of standard, adaptation ability is strong, multiple functional, high reliablity.
Access gateway (Access Gateway, abbreviation AG), it is such as common for user terminal to be directly accessed IP grouping net
Analog subscriber, ISDN etc..Media mapping and code conversion function are provided between IP network and user terminal, by media stream packet
Change and in the Media Stream of grouping transfers on network packetizing.
The present invention mainly describes how to send RTP when two accessing gateway equipments establish call connection by Softswitch
Media Stream.
Embodiment one
Fig. 1 is a kind of flow diagram for soft switch method of calling that the embodiment of the present invention one provides, as shown in Figure 1, should
The detailed process of soft switch method of calling is described below:
Step 101, when called user terminal off-hook, Softswitch is according to the public network IP of caller accessing gateway equipment
The public network IP address of location and called accessing gateway equipment judges the caller accessing gateway equipment and called accessing gateway equipment is
It is no to belong to same NAT device, if so, executing step 102；If it is not, process terminates.
Step 102, Softswitch obtain the private IP address information of the caller accessing gateway equipment and described called
The private IP address information of accessing gateway equipment.
Step 103, Softswitch send the private IP address information of the caller accessing gateway equipment to called access
Gateway, the private IP address information of the transmission called accessing gateway equipment are to caller accessing gateway equipment, for described
Caller accessing gateway equipment and called accessing gateway equipment mutually send out RTP Media Stream, and process terminates.
Soft switch method of calling provided in this embodiment, Softswitch is with sending the private ip of caller accessing gateway equipment
Private IP address information to the caller access gateway of location information to called accessing gateway equipment, the called accessing gateway equipment of transmission is set
It is standby, so that caller accessing gateway equipment and called accessing gateway equipment mutually send out RTP Media Stream, so that belonging to same NAT device
Accessing gateway equipment directly can mutually send out RTP Media Stream, the load pressure of NAT device has been effectively relieved and has avoided the wasting of resources.
Embodiment two
Fig. 2 is a kind of flow diagram of soft switch method of calling provided by Embodiment 2 of the present invention, as shown in Fig. 2, should
Soft switch method of calling includes:
Step 201, caller accessing gateway equipment send the first registration information to the Softswitch, first registration
Information includes the public network IP address of caller accessing gateway equipment.
First registration information for caller accessing gateway equipment on the Softswitch for succeeding in registration, after succeeding in registration
Caller accessing gateway equipment belong to the Softswitch.
Step 202, called accessing gateway equipment send the second registration information to the Softswitch, second registration
Information includes the public network IP address of called accessing gateway equipment.
Second registration information is used to succeed in registration on the Softswitch for called accessing gateway equipment, after succeeding in registration
Called accessing gateway equipment belong to the Softswitch.
The caller accessing gateway equipment and called accessing gateway equipment for belonging to same Softswitch can be by the soft friendships
Exchange device establishes connection, what the call subscriber terminal and called accessing gateway equipment having under its command for caller accessing gateway equipment had under its command
Called user terminal is conversed.
Step 203, call subscriber terminal send call request to called user terminal.
Before call subscriber terminal sends call request to called user terminal further include: Softswitch connects to caller
Function Access Gateway equipment sends Modify order (modification order) so that (sky is up and down in Null Context for caller accessing gateway equipment
Text) in establish terminate and wait off-hook event；Softswitch sends Modify order (modification life to called accessing gateway equipment
Enable) so that called accessing gateway equipment establishes termination in Null Context (empty context) and waits off-hook event.
Step 203 specifically includes: call subscriber terminal off-hook, and caller accessing gateway equipment sends Notify order (notice
Order) to Softswitch to report the off-hook event.Softswitch sends Modify order to caller accessing gateway equipment
And call subscriber terminal is waited to input called number corresponding with called user terminal, at this point, call subscriber terminal listens dialing tone；
After call subscriber terminal inputs called number, caller accessing gateway equipment sends Notify order and the called number to soft friendship
Exchange device, Softswitch analyze the called number, and when judging that the called number allows incoming call, it is new to send creation
Context commands are to caller accessing gateway equipment；Caller accessing gateway equipment creates a new context, and it is new up and down to also set up this
The information of text includes that (real-time transport protocol is whole by TDM Termination (time division multiplexing termination) and RTP Termination
Knot), and be transceiver mode by the mode setting of the new context, while its voice messaging is set, voice messaging includes that shake is slow
Deposit related content and voice compression algorithm；Caller accessing gateway equipment sends live transmission protocol port number and used voice
Compression algorithm is to Softswitch；Softswitch sends ring back tone to called accessing gateway equipment corresponding to called number,
And send the live transmission protocol port number and used voice compression algorithm to called access net of caller accessing gateway equipment
Close equipment；Called accessing gateway equipment sends the live transmission protocol port number for being called accessing gateway equipment and used voice
Compression algorithm to Softswitch, Softswitch sends the real-time transport protocol end of ring-back tone and called accessing gateway equipment
Slogan and used voice compression algorithm to caller accessing gateway equipment, caller access gateway and called access gateway need to be taken
Identical live transmission protocol port number and identical voice compression algorithm are communicated.
Step 204, when called user terminal off-hook, Softswitch cuts off the ring back tone of the called user terminal.
Specifically, when called user terminal off-hook, called accessing gateway equipment sends Notify order to soft switch and sets
Standby, Softswitch sends Modify order to called accessing gateway equipment and cuts off the ring back tone of called user terminal.
The public network IP address and called access gateway of step 205, Softswitch according to the caller accessing gateway equipment
The public network IP address of equipment judges whether the caller accessing gateway equipment and called accessing gateway equipment belong to same NAT and set
It is standby, if so, executing step 206；If it is not, process terminates.
The public network IP address for belonging to two accessing gateway equipments of same NAT device is identical, if Softswitch judges
When the public network IP address of caller accessing gateway equipment is identical as the public network IP address of called accessing gateway equipment out, that is, judge to lead
Accessing gateway equipment and called accessing gateway equipment is made to belong to same NAT device.
Step 206, Softswitch send private IP address acquisition request to caller accessing gateway equipment and called access
Gateway.
Private IP address acquisition request is used to obtain the private ip of caller accessing gateway equipment and called accessing gateway equipment
Address information.
Step 207, Softswitch cut off the ring-back tone of the call subscriber terminal, so that the caller access gateway is set
Standby and called accessing gateway equipment establishes connection.
After caller accessing gateway equipment and called accessing gateway equipment establish connection, caller access user terminal and called use
Family terminal establishes call connection, and RTP Media Stream is generated in communication process.
Step 208, caller accessing gateway equipment send caller access gateway according to the private IP address acquisition request and set
Standby private IP address information is to the Softswitch.
The private IP address information of caller accessing gateway equipment includes at least the private IP address of caller accessing gateway equipment.
Optionally, the private IP address information of caller accessing gateway equipment further includes caller accessing gateway equipment mark.
Step 209, called accessing gateway equipment send called access gateway according to the private IP address acquisition request and set
Standby private IP address information is to the Softswitch.
The private IP address information of called accessing gateway equipment includes at least the private IP address of called accessing gateway equipment.
Optionally, the private IP address information for being called accessing gateway equipment further includes called accessing gateway equipment mark.
Step 210, Softswitch send the private IP address information of the caller accessing gateway equipment to called access
Gateway, the private IP address information of the transmission called accessing gateway equipment are to caller accessing gateway equipment, for described
Caller accessing gateway equipment and called accessing gateway equipment mutually send out RTP Media Stream.
Specifically, caller accessing gateway equipment sends RTP Media Stream according to the private IP address of called accessing gateway equipment
To called accessing gateway equipment.Called accessing gateway equipment sends RTP matchmaker according to the private IP address of caller accessing gateway equipment
Body flow to caller accessing gateway equipment.Caller accessing gateway equipment and called accessing gateway equipment directly mutually send out RTP Media Stream, nothing
Transfer need to be carried out by NAT device again.
Soft switch method of calling provided in this embodiment, Softswitch is with sending the private ip of caller accessing gateway equipment
Private IP address information to the caller access gateway of location information to called accessing gateway equipment, the called accessing gateway equipment of transmission is set
It is standby, so that caller accessing gateway equipment and called accessing gateway equipment mutually send out RTP Media Stream, so that belonging to same NAT device
Accessing gateway equipment directly can mutually send out RTP Media Stream, RTP Media Stream is being effectively relieved without being converted by NAT device
The load pressure of NAT device and while avoid the wasting of resources, also effectively increases speech quality.
It should be noted that although describing the operation of the method for the present invention in the accompanying drawings with particular order, this is not required that
Or hint must execute these operations in this particular order, or have to carry out operation shown in whole and be just able to achieve the phase
The result of prestige.Additionally or alternatively, it is convenient to omit multiple steps are merged into a step and executed by certain steps, and/or will
One step is decomposed into execution of multiple steps.
Embodiment three
Fig. 3 is a kind of structural schematic diagram for soft switch calling system that the embodiment of the present invention three provides, as shown in figure 3, should
Soft switch calling system includes: Softswitch 1.
If Softswitch 1 is same for judging that caller accessing gateway equipment and called accessing gateway equipment belong to
NAT device, obtain the caller accessing gateway equipment private IP address information and the called accessing gateway equipment it is privately owned
IP address information, send the private IP address information of the caller accessing gateway equipment to called accessing gateway equipment, send institute
The private IP address information of called accessing gateway equipment is stated to caller accessing gateway equipment, for the caller accessing gateway equipment
RTP Media Stream is mutually sent out with called accessing gateway equipment.
The soft switch caller that soft switch calling system provided in this embodiment provides for realizing the embodiment of the present invention one
Method.
Soft switch calling system provided in this embodiment, including Softswitch, Softswitch connect for sending caller
The private IP address information of function Access Gateway equipment is called the private IP address of accessing gateway equipment to called accessing gateway equipment, transmission
Information makes to caller accessing gateway equipment so that caller accessing gateway equipment and called accessing gateway equipment mutually send out RTP Media Stream
The accessing gateway equipment that same NAT device must be belonged to directly can mutually send out RTP Media Stream, and the load of NAT device has been effectively relieved
Pressure simultaneously avoids the wasting of resources.
Example IV
Fig. 4 is a kind of structural schematic diagram for soft switch calling system that the embodiment of the present invention four provides, as shown in figure 4, should
Soft switch calling system includes: Softswitch 1.
If Softswitch 1 is same for judging that caller accessing gateway equipment and called accessing gateway equipment belong to
NAT device, obtain the caller accessing gateway equipment private IP address information and the called accessing gateway equipment it is privately owned
IP address information, send the private IP address information of the caller accessing gateway equipment to called accessing gateway equipment, send institute
The private IP address information of called accessing gateway equipment is stated to caller accessing gateway equipment, for the caller accessing gateway equipment
RTP Media Stream is mutually sent out with called accessing gateway equipment.
Further, system further include: caller accessing gateway equipment 2 and called accessing gateway equipment 3.
Caller accessing gateway equipment 2 is for sending the first registration information to the Softswitch 1, the first registration letter
Breath includes the public network IP address of caller accessing gateway equipment 2.Called accessing gateway equipment 3 is for sending the second registration information to institute
Softswitch 1 is stated, second registration information includes the public network IP address of called accessing gateway equipment 3.The soft switch is set
Standby 1 is also used to when called user terminal off-hook, according to the public network IP address of the caller accessing gateway equipment 2 and called access
The public network IP address of gateway 3 judges whether the caller accessing gateway equipment 2 and called accessing gateway equipment 3 belong to together
One NAT device.
Further, Softswitch 1 is also used to send private IP address acquisition request to 2 He of caller accessing gateway equipment
Called accessing gateway equipment 3.Caller accessing gateway equipment 2 is also used to send caller according to the private IP address acquisition request and connect
The private IP address information of function Access Gateway equipment 2 is to the Softswitch 1.Called accessing gateway equipment 3 is also used to according to
Private IP address acquisition request sends the private IP address information of called accessing gateway equipment 3 to the Softswitch 1.
Further, Softswitch 1 is also used to cut off the ring back tone of the called user terminal, cuts off the caller and uses
The ring-back tone of family terminal, so that the caller accessing gateway equipment 2 and called accessing gateway equipment 3 establish connection.
Further, system further include: call subscriber terminal 4 and called user terminal 5.Call subscriber terminal 4 is used for
Call request is sent to called user terminal 5.Called user terminal 5 is for off-hook and receives the transmission of call subscriber terminal 4
Call request.
Soft switch calling system provided in this embodiment is for realizing soft switch caller provided by Embodiment 2 of the present invention
Method.
Soft switch calling system provided in this embodiment, including Softswitch, Softswitch connect for sending caller
The private IP address information of function Access Gateway equipment is called the private IP address of accessing gateway equipment to called accessing gateway equipment, transmission
Information makes to caller accessing gateway equipment so that caller accessing gateway equipment and called accessing gateway equipment mutually send out RTP Media Stream
The accessing gateway equipment that same NAT device must be belonged to directly can mutually send out RTP Media Stream, and the load of NAT device has been effectively relieved
Pressure simultaneously avoids the wasting of resources.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Specific embodiment is applied in the present invention, and principle and implementation of the present invention are described, above embodiments
Explanation be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art,
According to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion in this specification
Appearance should not be construed as limiting the invention.
Claims (10)
1. a kind of soft switch method of calling characterized by comprising
If Softswitch judges that caller accessing gateway equipment and called accessing gateway equipment belong to same NAT device, obtain
Take the private IP address information of the caller accessing gateway equipment and the private IP address information of the called accessing gateway equipment；
Softswitch sends the private IP address information of the caller accessing gateway equipment to called accessing gateway equipment, transmission
The private IP address information of the called accessing gateway equipment is to caller accessing gateway equipment, so that the caller access gateway is set
Standby and called accessing gateway equipment mutually sends out RTP Media Stream.
2. soft switch method of calling according to claim 1, which is characterized in that obtain the master in the Softswitch
It cries and is also wrapped before the private IP address information of accessing gateway equipment and the private IP address information of the called accessing gateway equipment
It includes:
Caller accessing gateway equipment sends the first registration information to the Softswitch, and first registration information includes caller
The public network IP address of accessing gateway equipment；
Called accessing gateway equipment sends the second registration information to the Softswitch, and second registration information includes called
The public network IP address of accessing gateway equipment；
When called user terminal off-hook, Softswitch is according to the public network IP address of the caller accessing gateway equipment and called
The public network IP address of accessing gateway equipment judges whether the caller accessing gateway equipment and called accessing gateway equipment belong to
Same NAT device.
3. soft switch method of calling according to claim 1, which is characterized in that the Softswitch obtains the caller
The private IP address information of accessing gateway equipment and the private IP address information of the called accessing gateway equipment specifically include:
Softswitch sends private IP address acquisition request to caller accessing gateway equipment and called accessing gateway equipment；
Caller accessing gateway equipment sends the private ip of caller accessing gateway equipment according to the private IP address acquisition request
Location information is to the Softswitch；
Called accessing gateway equipment is with sending the private ip for being called accessing gateway equipment according to the private IP address acquisition request
Location information is to the Softswitch.
4. soft switch method of calling according to claim 3, which is characterized in that
In the Softswitch according to the public network IP address and called accessing gateway equipment of the caller accessing gateway equipment
Public network IP address judges whether the caller accessing gateway equipment and called accessing gateway equipment belong to before same NAT device
Further include:
Softswitch cuts off the ring back tone of the called user terminal；
Private IP address acquisition request to caller accessing gateway equipment and called access gateway is sent in the Softswitch to set
After standby further include:
Softswitch cuts off the ring-back tone of the call subscriber terminal, for the caller accessing gateway equipment and called access
Gateway establishes connection.
5. soft switch method of calling according to claim 4, which is characterized in that cut off the quilt in the Softswitch
Before the ring back tone for being user terminal further include:
Call subscriber terminal sends call request to called user terminal.
6. a kind of soft switch calling system characterized by comprising
Softswitch, if being set for judging that caller accessing gateway equipment and called accessing gateway equipment belong to same NAT
It is standby, obtain the private IP address information of the caller accessing gateway equipment and the private IP address of the called accessing gateway equipment
Information, the private IP address information for sending the caller accessing gateway equipment are described called to called accessing gateway equipment, transmission
The private IP address information of accessing gateway equipment for the caller accessing gateway equipment and is called to caller accessing gateway equipment
Accessing gateway equipment mutually sends out RTP Media Stream.
7. soft switch calling system according to claim 6, which is characterized in that further include:
Caller accessing gateway equipment, for sending the first registration information to the Softswitch, the first registration information packet
Include the public network IP address of caller accessing gateway equipment；
Called accessing gateway equipment, for sending the second registration information to the Softswitch, the second registration information packet
Include the public network IP address of called accessing gateway equipment；
The Softswitch is also used to when called user terminal off-hook, according to the public network IP of the caller accessing gateway equipment
The public network IP address of address and called accessing gateway equipment judges the caller accessing gateway equipment and called accessing gateway equipment
Whether same NAT device is belonged to.
8. soft switch calling system according to claim 6, which is characterized in that Softswitch is also used to send private ip
Address acquisition request is to caller accessing gateway equipment and called accessing gateway equipment；
Caller accessing gateway equipment is also used to send the private of caller accessing gateway equipment according to the private IP address acquisition request
There is IP address information to the Softswitch；
Called accessing gateway equipment is also used to send the private of called accessing gateway equipment according to the private IP address acquisition request
There is IP address information to the Softswitch.
9. soft switch calling system according to claim 8, which is characterized in that Softswitch is also used to cut off the quilt
The ring back tone for being user terminal cuts off the ring-back tone of the call subscriber terminal, for the caller accessing gateway equipment and by
Accessing gateway equipment is made to establish connection.
10. soft switch calling system according to claim 9, which is characterized in that further include:
Call subscriber terminal, for sending call request to called user terminal；
Called user terminal for off-hook and receives the call request that the call subscriber terminal sends.
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