CN102333166A - Soft switch call processing method for passing through proprietary service information - Google Patents
Soft switch call processing method for passing through proprietary service information Download PDFInfo
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- CN102333166A CN102333166A CN201110263758A CN201110263758A CN102333166A CN 102333166 A CN102333166 A CN 102333166A CN 201110263758 A CN201110263758 A CN 201110263758A CN 201110263758 A CN201110263758 A CN 201110263758A CN 102333166 A CN102333166 A CN 102333166A
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Abstract
The invention discloses a soft switch call processing method for passing through proprietary service information, belonging to the methods for transmitting proprietary service information between switch devices in the data communication field. The processing process of the method provided by the invention is as follows: after receiving a Q.913 message of a source terminal party, the soft switch device analyzes the message, and transmits corresponding Q.931 message to a target terminal party according to the receptivity of the target terminal party to the proprietary service information so as to ensure smooth communication between the source terminal party and the target terminal party, so that the soft switch device can pass through the proprietary service information. The method is based on a standard Q.931 protocol message, by which a offset message unit is locked to load the proprietary service information, so that the method is low in technology cost, excellent in functional expandability and high in cost-effectiveness ratio, and can reduce research and development cost and shorten project period; and with the method, the soft switch device is richer in processing functions for various messages, low in operating cost and better in functionality.
Description
Technical field
The invention belongs to the method for between switching equipment, transmitting proprietary business information in the data communication field, relate in particular to the soft switch call processing method of the proprietary business information of a kind of transparent transmission.
Background technology
Softswitch technology as the core technology of next generation network (NGN), its objective is to be grouped into the basis, builds public network of future generation, realizes the transition from Public Switched Telephone Network (PSTN) to next generation network (NGN).NGN is the network towards next generation communication, is the network that the comprehensive opening of miscellaneous services such as comprising speech, data and multimedia can be provided.NGN has not only realized the fusion of network, the more important thing is and has realized professional fusion, has sufficient superiority.
In Softswitch technology; Softswitch is the controlled function unit among the NGN, and it calls out control and connection control function for various device in the network provides, and the address in different application scenarios also is not quite similar; Such as, call server, Call Agent or Tandem Gateway controller.Softswitch links to each other with various types of gateways, such as IAD (AGW), trunking gateway (tgw), Integrated Access Device etc.Wherein, SGW (SG) is realized the conversion of signaling between Circuit Switching Network and the Packet Based Network, can be the part of IAD (AGW).
Softswitch can pass through Tandem Gateway place in circuit switching network, adopts Q.931 agreement between the switch in the Circuit Switching Network.Q.931 protocol message allows to utilize locking skew message elements to load proprietary business information.But can not directly control Q.931 protocol message between the switch in the Circuit Switching Network.
Q.931 the step that the agreement control switching equipment of standard is called out control foundation is following:
S1 calling party sends call setup message and gives switching equipment; Call out and connect beginning;
The S2 switching equipment sends to call out and is carrying out message to the calling party;
The S3 switching equipment sends call setup message and gives the callee;
S4 callee sends calling and is carrying out message to switching equipment;
S5 callee sends to remind and gives switching equipment;
The S6 switching equipment sends reminder message and gives the calling party;
S7 callee sends connection message and gives switching equipment;
The S8 switching equipment sends connection message and gives the calling party;
S9 calling party sends and connects acknowledge message to switching equipment;
The S10 switching equipment sends and connects acknowledge message to the callee; Call out to connect and accomplish.
In the NGN network, how effectively to utilize the existing resource in the communication network, it can smooth and easyly be communicated by letter, be a more scabrous problem.Current each soft switch communication producer has proposed the fusion that various solutions realize network.But for the fusion of business, because the limitation of variety of protocol standard, equipment interface does not also have perfect integrated services technology to occur.
Summary of the invention
The technical problem that the present invention will solve provides the utilization soft switch call processing method of the proprietary business information of a kind of transparent transmission of protocol message Q.931 that adapts to the at utmost various realization integrated services that next generation network communication requires.
In order to solve the problems of the technologies described above, the technical scheme that the present invention adopts is: the soft switch call processing method of the proprietary business information of a kind of transparent transmission comprises the steps:
The signaling AM access module of A, Softswitch receives the Q.931 message from source terminal side, with this Q.931 message deliver to the inner signaling resolution unit of signaling AM access module;
B, said signaling resolution unit are carried out protocol-decoding to the Q.931 message from source terminal side; Judge whether this message contains locking offset information unit; Be whether this message carries proprietary business information, when containing locking offset information unit in this message, carry out the following C step; Otherwise, the signaling AM access module of said Softswitch according to standard Q.931 the protocol processes flow process handle;
C, will be Q.931 in the message information beyond the locking offset information unit be called Q.931 protocol message of standard; Said signaling resolution unit will from the standard in the Q.931 message of source terminal side Q.931 protocol message be separated with proprietary business information in the locking offset information unit; Be that elementary cell deposits transparent transmission information tabulation in said proprietary business information with single proprietary business information then, with said transparent transmission information tabulation and the standard that converts Softswitch inside story form to Q.931 protocol message together be sent to Call Control Block;
D, said Call Control Block are confirmed target terminal according to the message content that receives from the above-mentioned C step, and are judged according to the information content of target terminal in the resource management module whether target terminal supports proprietary business information; When said target terminal is supported proprietary business information, said transparent transmission information tabulation is sent to said signaling AM access module, carry out the following E step; Otherwise, the AM access module of said Call Control Block notice signaling according to standard Q.931 the protocol processes flow process handle;
E, said signaling AM access module are set up the standard protocol message Q.931 that will be sent to target terminal side; And the proprietary business information the transparent transmission information tabulation that will receive from the above-mentioned D step be encapsulated into the standard that will be sent to target terminal and Q.931 form the Q.931 message that will be sent to target terminal side in the locking offset information unit of protocol message, said Softswitch through signaling AM access module with this Q.931 message be sent to target terminal.
Said Softswitch links to each other with Tandem Gateway through packet network, and sets up calling through call signaling control Tandem Gateway, and said Softswitch comprises:
Signaling AM access module: the agreement access capability is provided, accepts the processing of variety of protocol message in the packet network, and convert discernible unified message form of Softswitch Internal call control module and interface to; Inside is provided with the signaling resolution unit, and said signaling resolution unit is used for Q.931 protocol message of parsing, decomposition IUA message and standard; Be provided with the transparent transmission information tabulation and preserve proprietary business information;
Call processing module: provide the calling of unified message form control and management, realize calling out between multi-protocols route, forwarding, detection and trigger Business Processing;
Resource management module: be used to manage to the configuration information of Softswitch to source terminal side, target terminal side.
The technological progress of adopting technique scheme to obtain is:
Method of the present invention can realize the fusion of miscellaneous service to the full extent, has both kept the proprietary characteristic service ability that traditional programme-controlled exchange provides, and the advanced services of NGN network can be provided again.
1, technical costs is low, and efficiency-cost ratio is high.The standard of utilization maturation Q.931 protocol message only needs a small amount of message elements expansion can realize minimizing R&D costs, the shortening project cycle as message carrier.
2, good function expansibility.The employing standard is the framework mode of protocol message unit Q.931, can increase the proprietary business information of different purposes flexibly according to service needed, makes Softswitch abundanter to the processing capacity of various types of messages.
3, operation cost is low, and is functional good.In soft switchcall server, effectively utilized program-controlled exchange network, the featured function service of various traditional programme-controlled exchanges is provided.
Description of drawings
Fig. 1 is the Q.931 flow processing figure of agreement of employing standard;
Fig. 2 is a flow chart of the present invention;
Fig. 3 is the IE sketch map that carries the Q.931 protocol message of proprietary business information;
Fig. 4 is that the Softswitch inner function module concerns sketch map among the present invention;
Fig. 5 is the schematic network structure of embodiment;
Fig. 6 is each communication between devices protocol interface figure among the embodiment.
Embodiment
Arrive Fig. 4 according to Fig. 1, and combine method of the present invention to be done detailed explanation by Fig. 5 and embodiment shown in Figure 6.
Know that by Fig. 5 and shown in Figure 6 present embodiment inserts Softswitch in the existing circuit-switched network of being made up of JetWay (circuit switching) dispatching desk, circuit switching exchange and Tandem Gateway.
What adopt in the present embodiment is AcroSwitch 6000 SoftSwitches, AudioCode PRI Tandem Gateway, and the IXP2000 circuit switching exchange also can adopt the equipment of other models with identity function, as long as satisfy networking requirement.The terminal equipment that adopts in the present embodiment is JetWay (circuit switching) dispatching desk, can also be the terminal equipment of other types, such as pseudo-terminal, digital terminal, console etc.
Adopt Q.921 agreement between Tandem Gateway and the switch, adopt ISDN Q.921-User Adaptation Layer between Tandem Gateway and the SoftSwitch.
Q.921 the protocol message of communicating by letter between Tandem Gateway and the switch carries Q.931 protocol message; Switch will contain after Q.921 protocol message sends to Tandem Gateway of protocol message Q.931; The message bag that Tandem Gateway is responsible between circuit switching and packet switching is changed mutually; Be Tandem Gateway will be Q.921 protocol message convert IUA message to, also carry Q.931 message in the IUA message this moment.
Embodiment 1
JetWay dispatching desk 1 is called out connection through SoftSwitch to JetWay dispatching desk 2, based on the concrete steps of the call setup of the soft switch call processing method of the proprietary business information of a kind of transparent transmission is:
A, JetWay dispatching desk 1 make a call; Switch 1 sends to Tandem Gateway 1 and contains Q.931 the protocol message of the circuit-switched messages of protocol message-Q.921; Tandem Gateway 1 is with circuit-switched messages-Q.921 protocol message converts packet switched message-IUA message to; And this message sent to SoftSwitch, the Calling Side signaling AM access module of SoftSwitch is called the signaling resolution unit and is resolved this IUA message;
B, said signaling resolution unit from above-mentioned IUA message, extract standard Q.931 the call setup message of agreement be SETUP message; Said SETUP message is carried out protocol-decoding; Judge whether this message contains locking skew message elements; When containing locking skew message elements in the said SETUP message, explain to carry proprietary business information in the call setup message, carry out the following C step; When not containing locking skew message elements in the said SETUP message; Said Softswitch according to standard Q.931 the protocol processes flow process utilize the AM access module of Calling Side signaling to send calling to the calling party through Calling Side Tandem Gateway 1 to carry out message be CALL PROCEEDING message; Show that calling carries out, carry out the following F step;
C, the information beyond the locking offset information unit in the above-mentioned SETUP message is called Q.931 protocol message of standard; Said signaling resolution unit with the standard in the above-mentioned SETUP message Q.931 protocol message separate with the proprietary business information in the locking offset information unit; And be that unit deposits in the transparent transmission information tabulation with single proprietary business with proprietary business information; The AM access module of said Calling Side signaling with standard Q.931 protocol message convert the inner message SF_SETUP of SoftSwitch to; The transparent transmission information tabulation together is sent to Call Control Block with SF_SETUP, and (how a step is judged here in practical application, judges in the transparent transmission information tabulation whether contain proprietary business information; If find there is not proprietary business information in the tabulation of said transparent transmission information this moment, so Softswitch according to standard Q.931 the protocol processes flow process handle, only SF_SETUP message is sent to Call Control Block);
D, said Call Control Block are confirmed callee's route office direction according to the called number information in the SF_SETUP message; Find Tandem Gateway 2; Judge according to the configuration information of Tandem Gateway 2 whether Tandem Gateway 2 supports proprietary business information to handle (tenability of giving tacit consent to Tandem Gateway 2 and 2 pairs of proprietary business information of callee's switch here is equal to); When relaying gateway 2 is supported proprietary business information, said transparent transmission information tabulation is sent to the AM access module of callee side signaling, carry out the following E step; Otherwise; The AM access module of said Call Control Block notice signaling according to standard Q.931 the protocol processes flow process utilize the AM access module of Calling Side signaling to send calling to the calling party through Calling Side Tandem Gateway 1 to carry out message be CALL PROCEEDING message; Show that calling carries out; Carry out the following F step (how a step is judged in practical application, judges in the transparent transmission information tabulation whether contain proprietary business information here; If find there is not proprietary business information in the tabulation of said transparent transmission information this moment, also according to standard protocol processes flow performing Q.931);
E, said callee side signaling AM access module are set up the standard protocol message Q.931 that will be sent to Tandem Gateway 2; And the proprietary business information the transparent transmission information tabulation that will receive from the above-mentioned D step be encapsulated into the standard that will be sent to target terminal and Q.931 form the SETUP message that will be sent to target terminal in the locking offset information unit of protocol message; Promptly carried in the SETUP message from calling party's proprietary business information this moment; The callee side signaling AM access module of SoftSwitch is sent this SETUP message through callee side Tandem Gateway 2 to callee's switch 2, and JetWay dispatching desk 2 is made a call;
Preferably, the process of call setup also comprises step:
It is CALL PROCEEDING message that F, callee's switch 2 are carrying out message through callee side Tandem Gateway 2 to SoftSwitch transmission calling;
G, callee's switch 2 send reminder message ALERTING message through callee side Tandem Gateway 2 to SoftSwitch;
H, Softswitch send reminder message ALTERING message through Calling Side Tandem Gateway 1 to calling party's switch 1.
So far, JetWay dispatching desk 1 is set up to call out through the SETUP message that has proprietary business information with JetWay dispatching desk 2 and is connected.
AM access module of above-mentioned Calling Side signaling and the AM access module of callee side signaling are same isdn signaling AM access module, this moment two kinds of appellations only represent carry out different processing tasks the time isdn signaling AM access module.
Embodiment 2
Set up in the mutual communication process of calling out after connecting between JetWay dispatching desk 1 and the JetWay dispatching desk 2, when containing proprietary business information in the transmitted breath, treatment step is following:
A, callee's switch 2 send connection message CONNECT message through callee side Tandem Gateway 2 to SoftSwitch; Carry in this message between JetWay dispatching desk 1 and the JetWay dispatching desk 2 and want information transmitted, the callee side signaling AM access module of SoftSwitch is come out the Q.931 message extraction in the CONNECT message and is delivered to the signaling resolution unit and handle;
B, signaling resolution unit judge Q.931 whether this contain the offset-lock information unit in message, when Q.931 this contain the offset-lock information unit in message, carry out the following C step; Otherwise, according to standard Q.931 the protocol processes flow process handle;
C, signaling resolution unit with the standard in the above-mentioned Q.931 message Q.931 the proprietary business information in protocol message and the offset-lock information unit separate; And be that unit deposits in the tabulation of said transparent transmission information with single proprietary business information with proprietary business information; The AM access module of said callee side signaling with standard Q.931 protocol message convert the inner message SF_CONNECT of SoftSwitch to; The transparent transmission information tabulation together is sent to Call Control Block with SF_CONNECT (does not have proprietary business information in the said transparent transmission information tabulation if find this moment; So Softswitch according to standard Q.931 the protocol processes flow process handle, only SF_CONNECT message is sent to Call Control Block);
D, said Call Control Block are confirmed the route office direction of MPTY according to the called number content from the SF_CONNECT message that the AM access module of callee side signaling receives; Find Tandem Gateway 1; Judge according to the configuration information of Tandem Gateway 1 whether Tandem Gateway 1 supports proprietary business information (tenability of giving tacit consent to Tandem Gateway 1 and 1 pair of proprietary business information of callee's switch here is equal to); When relaying gateway 1 is supported proprietary business information; With the signaling AM access module of said transparent transmission information tabulation Calling Side, carry out the following E step; Otherwise the AM access module of said Call Control Block notice signaling is according to standard protocol processes flow process Q.931;
E, the AM access module of Calling Side signaling are set up the standard protocol message Q.931 that will be sent to Tandem Gateway 1; And the proprietary business information the transparent transmission information tabulation that will receive from the above-mentioned D step be encapsulated into the standard that will be sent to target terminal and Q.931 form the CONNECT message that will be sent to Tandem Gateway 1 in the locking offset information unit of protocol message; Promptly carried in the CONNECT message from callee's proprietary business information, the Calling Side signaling AM access module of SoftSwitch is sent this CONNECT message through Calling Side Tandem Gateway 1 to callee's switch 1 this moment;
Like this, just accomplished the transparent transmittance process of the proprietary business information between called party and the MPTY.
The transparent transmission process that above-mentioned two embodiment are proprietary business information, in this process, no matter whether useful information contains proprietary business information, can between called party and MPTY, successfully transmit.Whether called party and MPTY are only known communicating by letter successfully between the two, and do not know to exist to proprietary business information processing procedure therein, the essence of Here it is transparent transmission.
The present invention is core with the Softswitch, is peripheral switching node with programme-controlled exchange, through extension standards protocol message Q.931, forms the communication network that allows proprietary business information transparent transmission between the programme-controlled exchange.On lower operation cost, utilize the professional providing capability of programme-controlled exchange efficiently, realize the proprietary business information of characteristic of programme-controlled exchange at the whole network.
Method of the present invention be through extension standards Q.931 the skew of the locking in protocol message message elements accomplish the expansion of message, realize the transparent transmission of proprietary business information between the programme-controlled exchange.With proprietary business information with standard protocol infrastructure model Q.931; The i.e. version of " sign+length+content " encapsulation and the standard that is deposited into are Q.931 in the locking skew message elements of protocol message; Locking skew message elements can deposit one or more proprietary business information in; Different sign and the contents of each proprietary business information definition distinguished different service information with sign.
The core processing method of this method is:
After Softswitch receives the message from source terminal side; Judge and whether contain the offset-lock information unit in this message; Promptly judge and whether carry proprietary business information in this message; When not carrying proprietary business information in from the message of source terminal side, just adopt Q.931 the flow process of the call setup of standard agreement to handle; When carrying proprietary business information in the message from source terminal side; With proprietary business information and standard Q.931 protocol message separate; Judge then whether target terminal supports proprietary business information; If the called party does not support proprietary business information, abandon the proprietary business information separated so, Softswitch continue according to normal employing standard Q.931 the call setup flow process of agreement handle; If the called party supports proprietary business information, so, utilize the proprietary business information that extracts to form new information and be sent to target terminal.Can realize the transparent transmission of proprietary business information between source terminal side and the target terminal like this.
In sum, more than being merely preferred application example of the present invention, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being made, be equal to replacement etc., all should be included within protection scope of the present invention.
Claims (2)
1. the soft switch call processing method of the proprietary business information of transparent transmission is characterized in that comprising the steps:
The signaling AM access module of A, Softswitch receives the Q.931 message from source terminal side, with this Q.931 message deliver to the inner signaling resolution unit of signaling AM access module;
B, said signaling resolution unit are carried out protocol-decoding to the Q.931 message from source terminal side; Judge whether this message contains locking offset information unit; Be whether this message carries proprietary business information, when containing locking offset information unit in this message, carry out the following C step; Otherwise, the signaling AM access module of said Softswitch according to standard Q.931 the protocol processes flow process handle;
C, will be Q.931 in the message information beyond the locking offset information unit be called Q.931 protocol message of standard; Said signaling resolution unit will from the standard in the Q.931 message of source terminal side Q.931 protocol message be separated with proprietary business information in the locking offset information unit; Be that elementary cell deposits transparent transmission information tabulation in said proprietary business information with single proprietary business information then, with said transparent transmission information tabulation and the standard that converts Softswitch inside story form to Q.931 protocol message together be sent to Call Control Block;
D, said Call Control Block are confirmed target terminal according to the message content that receives from the above-mentioned C step, and are judged according to the information content of target terminal in the resource management module whether target terminal supports proprietary business information; When said target terminal is supported proprietary business information, said transparent transmission information tabulation is sent to said signaling AM access module, carry out the following E step; Otherwise, the AM access module of said Call Control Block notice signaling according to standard Q.931 the protocol processes flow process handle;
E, said signaling AM access module are set up the standard protocol message Q.931 that will be sent to target terminal side; And the proprietary business information the transparent transmission information tabulation that will receive from the above-mentioned D step be encapsulated into the standard that will be sent to target terminal and Q.931 form the Q.931 message that will be sent to target terminal in the locking offset information unit of protocol message, said Softswitch through signaling AM access module with this Q.931 message be sent to target terminal.
2. the soft switch call processing method of the proprietary business information of a kind of transparent transmission according to claim 1; Said Softswitch links to each other with Tandem Gateway through packet network; And, it is characterized in that said Softswitch comprises through call signaling control Tandem Gateway foundation calling:
Signaling AM access module: the agreement access capability is provided, accepts the processing of variety of protocol message in the packet network, and convert discernible unified message form of Softswitch Internal call control module and interface to; Inside is provided with the signaling resolution unit, and said signaling resolution unit is used for Q.931 protocol message of parsing, decomposition IUA message and standard; Be provided with the transparent transmission information tabulation and preserve proprietary business information;
Call processing module: provide the calling of unified message form control and management, realize calling out between multi-protocols route, forwarding, detection and trigger Business Processing;
Resource management module: be used to manage to the configuration information of Softswitch to source terminal side, target terminal side.
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Application publication date: 20120125 |