CN101707548B - Soft switch network and method for establishing call in soft switch network - Google Patents
Soft switch network and method for establishing call in soft switch network Download PDFInfo
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- CN101707548B CN101707548B CN 200910109690 CN200910109690A CN101707548B CN 101707548 B CN101707548 B CN 101707548B CN 200910109690 CN200910109690 CN 200910109690 CN 200910109690 A CN200910109690 A CN 200910109690A CN 101707548 B CN101707548 B CN 101707548B
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Abstract
The invention relates to a soft switch network. A source soft switch comprises a first classification module and a first forwarding module, wherein the first classification module is used for classifying an incoming call and assigning a value to a corresponding virtual route identifier according to the type of the incoming call; and the first forwarding module is used for forwarding a call establishment message which carries the virtual route identifier corresponding to the incoming call to a target soft switch. The target soft switch comprises a second resolution module and a second forwarding module, wherein the second resolution module is used for resolving the virtual route identifier of the call establishment message forwarded by the source soft switch; and the second forwarding module is used for selecting a corresponding outbound route according to the virtual route identifier to forward the call establishment message. The invention also provides a method for establishing call in the soft switch network. The soft switch network and the method for establishing the call in the soft switch network can simulate the trunk group configuration between PSTN network switches between soft switches.
Description
Technical field
The present invention relates to the switching network technology, relate in particular to a kind of flexible exchanging network and in flexible exchanging network, set up the method for calling out.
Background technology
Flexible exchanging network is a kind of network that control separates with access of calling out; Gateway device be responsible for accessing terminal user or terminal network; SoftSwitch (Softswitch) is responsible for calling out control and Business Processing; Itself and traditional, (Public Switched Telephone Network, PSTN) difference of network sees also Fig. 1 to PSTN.
Fig. 1 (a) is depicted as the connection sketch map of PSTN network, and Fig. 1 (b) is depicted as the connection sketch map of flexible exchanging network.In the PSTN network shown in Fig. 1 (a), switch 1 connects A, B office, and switch 2 connects C office, has trunk group to connect between switch 1 and the switch 2.In the flexible exchanging network shown in Fig. 1 (b); Tandem Gateway 1 under the SoftSwitch of source meets A, B office; Tandem Gateway 2 under the purpose SoftSwitch meets C office, and (Internet Protocol, IP) network connects as the media bearer net through Internet Protocol between source SoftSwitch and the purpose SoftSwitch.
Suppose the consideration from the relaying expense, need carry out following routing configuration: every A office all walks trunk group 5 from the calling of trunk group 1 through switch 1, switch 2 to C offices in switch 2 sides; Every B office all walks trunk group 6 through the calling of switches 1, switch 2 to C offices in switch 2 sides from trunk group 2.
In the PSTN network shown in Fig. 1 (a),, can, the trunk group between switch 1 and the switch 2 mark off two trunk groups (trunk group 3 and trunk group 4) in connecting in order to realize above-mentioned routing configuration.On switch 1, specify the calling of trunk group 1 all to walk trunk group 3 to switch 2; On switch 2, specify the calling of trunk group 3 to C offices all to walk trunk group 5 then; Similarly; On switch 1, specify the calling of trunk group 2 all to walk trunk group 4, on switch 2, specify the calling of trunk group 4 to C offices all to walk trunk group 6 then, so both can realize above-mentioned routing configuration to switch 1.
In the flexible exchanging network shown in Fig. 1 (b); Owing to use IP network as the media bearer net; And the connection of the medium of IP network all is dynamic; Can not mark off different trunk groups as the PSTN network between Tandem Gateway 1 and the Tandem Gateway 2, therefore continue to use the soft switch related protocol of standard and can not realize same routing configuration, will cause like this can't implementing some specific routing policies behind operator's employing SoftSwitch.Therefore, be necessary that trunk group configuration mode between the switch of simulation PSTN network between the SoftSwitch is to address the above problem.
Summary of the invention
The method that the object of the present invention is to provide a kind of flexible exchanging network and in flexible exchanging network, set up to call out through the trunk group configuration mode between the switch of simulation PSTN network between the SoftSwitch to address the above problem.
The present invention provides a kind of flexible exchanging network; Comprise source SoftSwitch and purpose SoftSwitch; Wherein, The source SoftSwitch comprises first sort module and first forwarding module; First sort module is used for classifying and according to going into to the type assignment corresponding virtual Route Distinguisher of calling out, first forwarding module is used for setting up message to the forwarded call of purpose SoftSwitch to going into to calling, and the call setup message that first forwarding module is transmitted to the purpose SoftSwitch carries saidly goes into to calling out pairing virtual Route Distinguisher.The purpose SoftSwitch comprises second parsing module and second forwarding module; Second parsing module is used to resolve the virtual Route Distinguisher of the call setup message that the source SoftSwitch transmits, and second forwarding module is used for selecting corresponding outgoing route to send call setup message according to virtual Route Distinguisher.
Preferably; Above-mentioned first sort module identifies, goes into to adjoining switch node identification, calling number, called number, Original Signaling Point sign indicating number, destination signaling point sign indicating number or conversation initiating protocol message head field and classify to going into to calling based on incoming trunk group, or classifies based on the combination that incoming trunk group identifies, goes between adjoining switch node identification, calling number, called number, Original Signaling Point sign indicating number, destination signaling point sign indicating number or conversation initiating protocol message head field.
Preferably, above-mentioned outgoing route is for going out to trunk group, next jumping SoftSwitch node or next jumping session initial protocol server.
The present invention also provides a kind of method of calling out of in flexible exchanging network, setting up; Comprise: the source SoftSwitch is classified also according to going into to the type assignment corresponding virtual Route Distinguisher of calling out to going into to calling; Set up message to the forwarded call of purpose SoftSwitch then, the call setup message of transmitting to the purpose SoftSwitch carries into to calling out pairing virtual Route Distinguisher; The purpose SoftSwitch is resolved the virtual Route Distinguisher of the call setup message of source SoftSwitch forwarding, and selects corresponding outgoing route to send call setup message according to virtual Route Distinguisher.
Preferably; Above-mentioned source SoftSwitch identifies, goes into to adjoining switch node identification, calling number, called number, Original Signaling Point sign indicating number, destination signaling point sign indicating number or conversation initiating protocol message head field and classify to going into to calling based on incoming trunk group, or classifies based on the combination that incoming trunk group identifies, goes between adjoining switch node identification, calling number, called number, Original Signaling Point sign indicating number, destination signaling point sign indicating number or conversation initiating protocol message head field.
Preferably, above-mentioned source SoftSwitch carries virtual Route Distinguisher through the invitation message in the session initiation protocol and sends to the purpose SoftSwitch.
Preferably, above-mentioned virtual Route Distinguisher representes through new extension header field in the invitation message, perhaps representes virtual Route Distinguisher through spreading parameter in existing field in invitation message.
Preferably, above-mentioned outgoing route is for going out to trunk group, next jumping SoftSwitch node or next jumping session initial protocol server.
Flexible exchanging network in the embodiment of the invention and the method for in flexible exchanging network, setting up calling; Support is classified and assignment corresponding virtual Route Distinguisher to going into to calling through the source SoftSwitch, and in the call setup message that sends to the purpose SoftSwitch, according to type of call corresponding virtual Route Distinguisher is set; After the purpose SoftSwitch receives call setup message, resolve the virtual Route Distinguisher in the call setup message, and select outgoing route according to virtual Route Distinguisher, thus realized with the PTSN network in identical routing configuration and routing policy.
Description of drawings
Fig. 1 (a) is depicted as the connection sketch map of PSTN network;
Fig. 1 (b) is depicted as the connection sketch map of flexible exchanging network;
Shown in Figure 2 for the structural representation of a kind of flexible exchanging network embodiment of the present invention;
The sketch map of carrying out routing policy for flexible exchanging network of the present invention shown in Figure 3;
Flow chart for a kind of method embodiment that foundation is called out in flexible exchanging network of the present invention shown in Figure 4;
The flow chart of in flexible exchanging network, setting up the method embodiment that calls out for another kind of the present invention shown in Figure 5.
The realization of the object of the invention, functional characteristics and advantage will combine embodiment, further specify with reference to accompanying drawing.
Embodiment
The present invention is through the sign that adds virtual route in the call setup message between source SoftSwitch and purpose SoftSwitch (VRID, Virtual Route Identifier), to simulate the trunk group in the existing P STN network through virtual Route Distinguisher.The source SoftSwitch is classified to going into to calling, and the purpose of classification is on the purpose SoftSwitch, dissimilar going into to calling out to be realized corresponding routing policy.To going into of different routing policies to calling; The source SoftSwitch will be given different virtual Route Distinguisher; Virtual Route Distinguisher will send to the purpose SoftSwitch with call setup message, and the purpose SoftSwitch can be taked corresponding routing policy according to the value of virtual Route Distinguisher after receiving call setup message.Below in conjunction with accompanying drawing and specific embodiment technical scheme according to the invention is done further to describe in detail so that those skilled in the art can better understand the present invention and can implement, but the embodiment that lifts not conduct to qualification of the present invention.
Shown in Figure 2 for the structural representation of a kind of flexible exchanging network embodiment of the present invention.
Flexible exchanging network of the present invention comprises source SoftSwitch 10 and purpose SoftSwitch 20.Source SoftSwitch 10 comprises first sort module 101 and first forwarding module 102; First sort module 101 is used for classifying also according to going into to the type assignment corresponding virtual Route Distinguisher of calling out to going into to calling; First forwarding module 102 is used for setting up message to 20 forwarded calls of purpose SoftSwitch, and the call setup message that first forwarding module 102 is transmitted to purpose SoftSwitch 20 carries into to calling out pairing virtual Route Distinguisher.First sort module 101 identifies, goes into to adjoining switch node identification, calling number, called number, Original Signaling Point sign indicating number, destination signaling point sign indicating number or session initiation protocol (SIP) message header field and classify to going into to calling based on incoming trunk group, or classifies based on the combination that incoming trunk group identifies, goes between adjoining switch node identification, calling number, called number, Original Signaling Point sign indicating number, destination signaling point sign indicating number or conversation initiating protocol message head field.Outgoing route is for going out to trunk group, next jumping SoftSwitch node or next jumping session initial protocol server.Specifically see also the present invention's flexible exchanging network shown in Figure 3 and carry out the sketch map of routing policy.In the present embodiment, dissimilar going into can be identical to calling out its routing policy, thereby can use same virtual Route Distinguisher.
In Fig. 3, suppose that 10 pairs of source SoftSwitches are gone into to calling and be divided into type of call 1, type of call 2, type of call 3 and type of call 4 that totally four types, wherein Class1 is identical with the call policy of type of call 4, thereby identical virtual Route Distinguisher is set, and is 1; Type of call 2 is inequality and also inequality with the routing policy of type of call 1, type of call 4 with the call policy of type of call 3; Thereby being provided with different virtual Route Distinguisher, the virtual Route Distinguisher of type of call 2 is 2, the virtual Route Distinguisher of type of call 3 is 3.
Purpose SoftSwitch 20 comprises second sort module 201 and second forwarding module 202; Second sort module 201 is used to resolve the virtual Route Distinguisher of the call setup message that source SoftSwitch 10 transmits, and second forwarding module 202 is used for selecting corresponding outgoing route to send call setup message according to virtual Route Distinguisher.For example, be that 1 calling is selected to trunk group 7 to virtual Route Distinguisher among Fig. 3, be that 2 calling is selected to trunk group 9 to virtual Route Distinguisher, virtual Route Distinguisher is that 3 calling is selected to trunk group 8.
In the present embodiment, at first go into to calling to classify and assignment corresponding virtual Route Distinguisher, and in the call setup message that sends to purpose SoftSwitch 20, corresponding virtual Route Distinguisher is set according to type of call through 101 pairs of first sort modules; After purpose SoftSwitch 20 receives call setup message; Through the virtual Route Distinguisher in second sort module, the 201 parsing call setup messages; And select outgoing route according to virtual Route Distinguisher, thereby realized with the PTSN network in identical routing configuration and routing policy.
Flow chart for a kind of method embodiment that foundation is called out in flexible exchanging network of the present invention shown in Figure 4.
In the present embodiment; The source SoftSwitch 10 of flexible exchanging network and purpose be soft changes planes and 20 is connected active session initial protocol server and purpose session initial protocol server respectively; Call setup message sends to source SoftSwitch 10 by the source session initial protocol server; And send to the purpose session initial protocol server by purpose SoftSwitch 20, subsequent process carries out according to existing calling procedure, and is specific as follows:
Step S401, the call setup message of source session initial protocol server reception sources office also sends call setup messages to source SoftSwitch 10.In the present embodiment, this call setup message is the initial address message of ISDNYong Hubufen agreement.
Step S402,10 pairs of source SoftSwitches go into to calling to classify and according to going into to the type assignment corresponding virtual Route Distinguisher of calling out, set up message to 20 forwarded calls of purpose SoftSwitch then.The call setup message that source SoftSwitch 10 is transmitted to purpose SoftSwitch 20 carries into to calling out pairing virtual Route Distinguisher.In the present embodiment, 10 pairs of source SoftSwitches are gone into to classify to calling and are based on a field of invitation (INVITE) message that session initial protocol server sends, i.e. the combination of From field and To field is classified to going into to calling.Source SoftSwitch 10 carries virtual Route Distinguisher through invitation message; And send to purpose SoftSwitch 20; Virtual Route Distinguisher can represent through new extension header field in the invitation message, perhaps representes virtual Route Distinguisher through spreading parameter in existing field in invitation message.
Step S403; The virtual Route Distinguisher of the call setup message that purpose SoftSwitch 20 parsing source SoftSwitches 10 are transmitted; And the outgoing route transmission call setup message corresponding according to virtual Route Distinguisher selection, outgoing route points to next and jumps session initial protocol server.
Step S404, purpose session initial protocol server receive the call setup message of purpose SoftSwitch 20 transmissions and send to purpose office.
In the present embodiment, at first go into to calling to classify and assignment corresponding virtual Route Distinguisher, and in the call setup message that sends to purpose SoftSwitch 20, corresponding virtual Route Distinguisher is set according to type of call through 10 pairs of source SoftSwitches; After purpose SoftSwitch 20 receives call setup message, resolve the virtual Route Distinguisher in the call setup message, and select outgoing route according to virtual Route Distinguisher, thus realized with the PTSN network in identical routing configuration and routing policy.
The flow chart of in flexible exchanging network, setting up the method embodiment that calls out for another kind of the present invention shown in Figure 5.
In the present embodiment; The source SoftSwitch 10 of flexible exchanging network and purpose be soft changes planes and 20 is connected active Tandem Gateway and purpose Tandem Gateway respectively; Calling party's call setup message sends to source SoftSwitch 10 by the source Tandem Gateway, by purpose SoftSwitch 20 call setup message is sent to the purpose Tandem Gateway again, by the purpose Tandem Gateway call setup message is sent to the callee afterwards; Subsequent process carries out according to existing calling procedure, and is specific as follows:
Step S501, the call setup message of source Tandem Gateway reception sources office also sends call setup messages to source SoftSwitch 10.In the present embodiment, this call setup message is the initial address message of ISDNYong Hubufen agreement.
Step S502,10 pairs of source SoftSwitches go into to calling to classify and according to going into to the type assignment corresponding virtual Route Distinguisher of calling out, set up message to 20 forwarded calls of purpose SoftSwitch then.The call setup message that source SoftSwitch 10 is transmitted to purpose SoftSwitch 20 carries into to calling out pairing virtual Route Distinguisher.In the present embodiment, source SoftSwitch 10 is based on into classifying to going into to calling to the MSC route of calling out shared repeat circuit place.Source SoftSwitch 10 is to carry virtual Route Distinguisher through invitation message; And send to purpose SoftSwitch 20; Virtual Route Distinguisher can represent through new extension header field in the invitation message, perhaps representes virtual Route Distinguisher through spreading parameter in existing field in invitation message.
Step S503; The virtual Route Distinguisher of the call setup message that purpose SoftSwitch 20 parsing source SoftSwitches 10 are transmitted; And select corresponding outgoing route to send call setup message according to virtual Route Distinguisher, outgoing route is for going out to trunk group with this purpose SoftSwitch is connected.
Step S504, purpose Tandem Gateway receive the call setup message of purpose SoftSwitch 20 transmissions and send to purpose office.
In the present embodiment, at first go into to calling to classify and assignment corresponding virtual Route Distinguisher, and in the call setup message that sends to purpose SoftSwitch 20, corresponding virtual Route Distinguisher is set according to type of call through 10 pairs of source SoftSwitches; After purpose SoftSwitch 20 receives call setup message, resolve the virtual Route Distinguisher in the call setup message, and select outgoing route according to virtual Route Distinguisher, thus realized with the PTSN network in identical routing configuration and routing policy.
The above is merely the preferred embodiments of the present invention; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (8)
1. a flexible exchanging network comprises source SoftSwitch and purpose SoftSwitch, it is characterized in that:
Said source SoftSwitch comprises first sort module and first forwarding module; First sort module is used for classifying also according to going into to the type assignment corresponding virtual Route Distinguisher of calling out to going into to calling; First forwarding module is used for setting up message to the forwarded call of purpose SoftSwitch, and the call setup message that first forwarding module is transmitted to the purpose SoftSwitch carries saidly goes into to calling out pairing virtual Route Distinguisher;
Said purpose SoftSwitch comprises second parsing module and second forwarding module; Said second parsing module is used to resolve the virtual Route Distinguisher of the said call setup message that the source SoftSwitch transmits, and said second forwarding module is used for selecting corresponding outgoing route to send said call setup message according to said virtual Route Distinguisher.
2. a kind of flexible exchanging network as claimed in claim 1; It is characterized in that; Said first sort module identifies, goes into to adjoining switch node identification, calling number, called number, Original Signaling Point sign indicating number, destination signaling point sign indicating number or conversation initiating protocol message head field and classify to going into to calling based on incoming trunk group, or classifies based on the combination that incoming trunk group identifies, goes between adjoining switch node identification, calling number, called number, Original Signaling Point sign indicating number, destination signaling point sign indicating number or conversation initiating protocol message head field.
3. like claim 1 or 2 described a kind of flexible exchanging networks, it is characterized in that said outgoing route is for going out to trunk group, next jumping SoftSwitch node or next jumping session initial protocol server.
4. in flexible exchanging network, set up the method for calling out for one kind, it is characterized in that, comprising:
The source SoftSwitch is classified also according to going into to the type assignment corresponding virtual Route Distinguisher of calling out to going into to calling; Set up message to the forwarded call of purpose SoftSwitch then, the said call setup message of transmitting to the purpose SoftSwitch carries saidly goes into to calling out pairing virtual Route Distinguisher;
The purpose SoftSwitch is resolved the virtual Route Distinguisher of the said call setup message of source SoftSwitch forwarding, and selects corresponding outgoing route to send said call setup message according to said virtual Route Distinguisher.
5. a kind of method of calling out of in flexible exchanging network, setting up as claimed in claim 4; It is characterized in that; Said source SoftSwitch identifies, goes into to adjoining switch node identification, calling number, called number, Original Signaling Point sign indicating number, destination signaling point sign indicating number or conversation initiating protocol message head field and classify to going into to calling based on incoming trunk group, or classifies based on the combination that incoming trunk group identifies, goes between adjoining switch node identification, calling number, called number, Original Signaling Point sign indicating number, destination signaling point sign indicating number or conversation initiating protocol message head field.
6. like claim 4 or 5 described a kind of methods of calling out of in flexible exchanging network, setting up, it is characterized in that said source SoftSwitch carries virtual Route Distinguisher through the invitation message in the session initiation protocol and sends to the purpose SoftSwitch.
7. like claim 4 or 5 described a kind of methods of calling out of in flexible exchanging network, setting up; It is characterized in that; Said virtual Route Distinguisher representes through new extension header field in the invitation message, perhaps representes virtual Route Distinguisher through spreading parameter in existing field in invitation message.
8. like claim 4 or 5 described a kind of methods of calling out of in flexible exchanging network, setting up, it is characterized in that said outgoing route is for going out to trunk group, next jumping SoftSwitch node or next jumping session initial protocol server.
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| CN107231372A (en) * | 2017-06-28 | 2017-10-03 | 深圳市欧乐在线技术发展有限公司 | A kind of Dynamic VPN network method for building up and device |
| CN109285550A (en) * | 2018-09-14 | 2019-01-29 | 中科智云科技(珠海)有限公司 | Voice dialogue intelligent analysis method based on Softswitch technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005431A (en) * | 2006-06-24 | 2007-07-25 | 华为技术有限公司 | Realizing device and method for multiple homing in next generation network |
| CN101014004A (en) * | 2007-01-16 | 2007-08-08 | 华为技术有限公司 | Method and system for processing emergent calling and a softswitch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005431A (en) * | 2006-06-24 | 2007-07-25 | 华为技术有限公司 | Realizing device and method for multiple homing in next generation network |
| CN101014004A (en) * | 2007-01-16 | 2007-08-08 | 华为技术有限公司 | Method and system for processing emergent calling and a softswitch |
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