CN1501650A - A call flow setting up method - Google Patents
A call flow setting up method Download PDFInfo
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- CN1501650A CN1501650A CNA021525021A CN02152502A CN1501650A CN 1501650 A CN1501650 A CN 1501650A CN A021525021 A CNA021525021 A CN A021525021A CN 02152502 A CN02152502 A CN 02152502A CN 1501650 A CN1501650 A CN 1501650A
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- soft switch
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Abstract
The invention relates to a method for establishing call flow path in the communication technology, wherein the soft exchange transmitting the initial address message (IAM) transmitted by the calling message gateway to the called message gateway, and the calling repeat gateway obtains the IP address and port number of the called RTP ending spot. The invention discloses a better method for establishing the call flow path.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method for building up of call flow.
Background technology
Soft switch is the controlled function entity of next generation network (NGN:New Generation Network), the calling control and the connection control function of the business with real-time requirement are provided for next generation network, be that next generation network is called out and the core of controlling, in communication system, control solves through consultation, and correspondingly just necessary protocols having is in the NGN architecture, soft switch is as control centre, just by supporting H.248 to wait various protocols to realize.
H.248 agreement is the control protocol between Media Gateway Controller and the media gateway, it is a kind of principal and subordinate's agreement, based on Media Gateway Controller, media gateway be from, Media Gateway Controller control miscellaneous service gateway, realize the intercommunication of packet network and public switched telephone network (PSTN), present, international and domestic normal structure is to having done related advisory with protocol-dependent call setup flow process H.248.
Destination node (Termination) is the logic entity on the media gateway (MG:Media Gateway), its initiation and/or receiving media and/or control flows, TDM termination is a kind of semipermanent destination node, and RTP termination is a kind of provisional destination node.Related (context) shows the annexation between the destination node, can create by the Add order, make amendment by the Modify order, also can delete by Subtract, Move order, a destination node belongs to and can only belong to an association at any one time.
Be illustrated in figure 1 as the existing call setup flow process of initiating by Trunk Media Gateway (TMG:Trunk Media Gateway), Trunk Media Gateway is connected with the user by the circuit relay in the Circuit Switching Network, call signaling enters Softswitch by SGW (SG:Signaling Gateway) by Signaling System Number 7, and agreement:
(1) calling subscriber is positioned at the compass of competency of Trunk Media Gateway TMG1 and SGW SG1;
(2) called subscriber is positioned at the compass of competency of Trunk Media Gateway TMG2 and SGW SG2;
(3) Trunk Media Gateway TMG1 and TMG2 belong in the compass of competency of a soft switch;
(4) Signaling System Number 7 adopts ISUP (ISUP) signaling;
ISDN User Part message comprises: initial address message (IAM:Initial AddressMessage), Address Complete Message (ACM:Address Completion Message), response message (ANM:Answer Message) etc.
Existing call flow is as follows:
(1) subscriber dialing sends (IAM) by the Signaling System Number 7 gateway to soft switch.
(2) in TMG1, create a new association, and in association, add semipermanent destination node (TDM) and provisional destination node (RTP).
(3) in TMG2, create a new association, and in association, add semipermanent destination node (TDM) and provisional destination node (RTP).
(4) soft switch sends IAM by the Signaling System Number 7 gateway to Circuit Switching Network, the loopback ACM of Circuit Switching Network, called terminal ringing.
(5) soft switch sends the Modify order to TMG1, the far-end RTP port numbers of announcement and IP address, and notice sends ring-back tone.
(6) soft switch sends ACM to SG1.
(7) called off-hook, SG2 sends ANM to soft switch.
(8) soft switch sends the Modify order to TMG1, cuts off ring-back tone.
(9) soft switch sends ANM to SG1.
When realizing, there is a problem based on above flow process: if off-hook immediately behind the called terminal ringing, can find also not foundation of Media Stream, also can find out by Fig. 1, the Signaling System Number 7 gateway sends to Circuit Switching Network with the IAM that soft switch sends, the loopback ACM of Circuit Switching Network, called terminal ringing, but soft switch receives the ACM of Circuit Switching Network's loopback by the Signaling System Number 7 gateway, obtain the IP address and the port numbers of called RTP destination node again by Modify request control caller Tandem Gateway, the foundation of finishing Media Stream by Tandem Gateway has a fixed response time again, thus immediately during off-hook Media Stream can also not set up.
Summary of the invention
Technical problem to be solved by this invention is: overcome the defective of existing call flow process, when off-hook is provided behind a kind of called terminal ringing immediately, set up the method for building up of the call flow of Media Stream.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be: the method for building up of this call flow may further comprise the steps:
A, subscriber dialing send initial address message (IAM) by the Signaling System Number 7 gateway to soft switch;
B, an establishment new association (Context) in the caller Trunk Media Gateway, and in association
Middle semipermanent destination node and the provisional destination node of adding;
C, new association of establishment in called Trunk Media Gateway, and in association, add partly forever
Property destination node of a specified duration and provisional destination node;
D, soft switch send the Modify order to the caller Trunk Media Gateway, and the far-end of announcement is provisional
Destination node port numbers and IP address;
E, soft switch send initial address message by the Signaling System Number 7 gateway to Circuit Switching Network
(IAM), the full message of Circuit Switching Network's loopback address (ACM), called terminal ringing;
F, soft switch send the Modify order to the caller Trunk Media Gateway, and notice sends ring-back tone;
G, soft switch send Address Complete Message (ACM) to the caller SGW.
Off-hook behind the called terminal ringing, call-establishing method is as follows:
H, called off-hook, called SGW sends response message (ANM) to soft switch;
I, soft switch send the Modify order to the caller Trunk Media Gateway, cut off ring-back tone;
J, soft switch send response message (ANM) to the caller SGW.
Beneficial effect of the present invention is: the present invention improves the defective of the call flow of specifications recommend according to the experience in the actual implementation procedure, the IAM that soft switch sends the caller SGW sends to before the called SGW, the IP address and the port numbers of called RTP destination node have been obtained by Modify request control caller Tandem Gateway, so before soft switch sends IAM, controlled the foundation that Tandem Gateway has been finished Media Stream, therefore, even behind the called terminal ringing immediately off-hook can not occur Media Stream behind the off-hook yet and also do not have situation about setting up, the invention provides a kind of method for building up of more perfect call flow.
Description of drawings
Fig. 1 is existing call setup schematic flow sheet of being initiated by Trunk Media Gateway;
The call setup schematic flow sheet that Fig. 2 is initiated by Trunk Media Gateway for the present invention.
Embodiment
With embodiment the present invention is described in further detail with reference to the accompanying drawings below:
As shown in Figure 2, overcoming the above problems needs the control soft switch to send the opportunity of IAM, and this call setup flow process of the present invention is as follows:
(1) subscriber dialing sends IAM by the Signaling System Number 7 gateway to soft switch.
(2) in TMG1, create a new association, and in association, add semipermanent destination node (TDM) and provisional destination node (RTP).
(3) in TMG2, create a new association, and in association, add semipermanent destination node (TDM) and provisional destination node (RTP).
(4) soft switch sends Modify order, the far-end RTP port numbers of announcement and IP address to TMG1.
(5) soft switch sends IAM by the Signaling System Number 7 gateway to Circuit Switching Network, the loopback ACM of Circuit Switching Network, called terminal ringing.
(6) soft switch sends the Modify order to TMG1, and notice sends ring-back tone.
(7) soft switch sends ACM to SG1.
(8) called off-hook, SG2 sends ANM to soft switch.
(9) soft switch sends the Modify order to TMG1, cuts off ring-back tone.
(10) soft switch sends ANM to SG1.
After revising like this, though off-hook immediately behind the called terminal ringing, because soft switch has been controlled the foundation that Tandem Gateway has been finished Media Stream before sending IAM, so the situation that Media Stream behind the off-hook also not have foundation can not occur.
Claims (2)
1. the method for building up of a call flow may further comprise the steps:
A, subscriber dialing send initial address message (IAM) by the Signaling System Number 7 gateway to soft switch;
B, an establishment new association (Context) in the caller Trunk Media Gateway, and in association
Middle semipermanent destination node and the provisional destination node of adding;
C, new association of establishment in called Trunk Media Gateway, and in association, add partly forever
Property destination node of a specified duration and provisional destination node;
D, soft switch send the Modify order to the caller Trunk Media Gateway, and the far-end of announcement is provisional
Destination node port numbers and IP address;
E, soft switch send initial address message by the Signaling System Number 7 gateway to Circuit Switching Network
(IAM), the full message of Circuit Switching Network's loopback address (ACM), called terminal ringing;
F, soft switch send the Modify order to the caller Trunk Media Gateway, and notice sends ring-back tone;
G, soft switch send Address Complete Message (ACM) to the caller SGW.
2. according to the method for building up of the call flow shown in the claim 1, it is characterized in that: if off-hook behind the called terminal ringing, call-establishing method is as follows:
H, called off-hook, called SGW sends response message (ANM) to soft switch;
I, soft switch send the Modify order to the caller Trunk Media Gateway, cut off ring-back tone;
J, soft switch send response message (ANM) to the caller SGW.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02152502 CN1266901C (en) | 2002-11-14 | 2002-11-14 | A call flow setting up method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02152502 CN1266901C (en) | 2002-11-14 | 2002-11-14 | A call flow setting up method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1501650A true CN1501650A (en) | 2004-06-02 |
| CN1266901C CN1266901C (en) | 2006-07-26 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02152502 Expired - Fee Related CN1266901C (en) | 2002-11-14 | 2002-11-14 | A call flow setting up method |
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| Country | Link |
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| CN (1) | CN1266901C (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007059650A1 (en) * | 2005-11-25 | 2007-05-31 | Zte Corporation | A media gateway system and a method for achieving the internal calling of the media gateway |
| WO2007131435A1 (en) * | 2006-05-09 | 2007-11-22 | Huawei Technologies Co., Ltd. | A calling method, system and msce over ip supporting |
| CN100407854C (en) * | 2004-07-31 | 2008-07-30 | 华为技术有限公司 | Audio playing back method in wideband CDMA communication system |
| CN100452786C (en) * | 2006-10-16 | 2009-01-14 | 武汉市中光通信公司 | Large compositive gateway access system based on NGN |
| CN100461968C (en) * | 2006-09-29 | 2009-02-11 | 华为技术有限公司 | Method, system and media gateway for obtaining dialing number information |
| WO2009046592A1 (en) * | 2007-10-10 | 2009-04-16 | Zte Corporation | A method, system and a mobile terminal for restraining ring in a mobile communication service |
| CN101056282B (en) * | 2006-06-20 | 2010-05-12 | 华为技术有限公司 | Implementation method, device and system of the random channel signaling under the H.248 separated architecture |
| CN101123593B (en) * | 2007-09-20 | 2010-06-09 | 中兴通讯股份有限公司 | Method for streaming implementation in media gateway control |
| CN101247313B (en) * | 2007-02-13 | 2010-11-10 | 中兴通讯股份有限公司 | Out-trunk call establishment method |
| CN1984177B (en) * | 2006-04-14 | 2011-04-06 | 华为技术有限公司 | System and method for realizing color bell service |
| CN101132348B (en) * | 2006-08-22 | 2011-05-25 | 中兴通讯股份有限公司 | Method for implementing IMS distinguished ring business by SIP signaling expansion |
| CN101207547B (en) * | 2006-12-20 | 2011-05-25 | 曲锐 | System and method for implementing intercommunication of public switched telephone network and IP network |
| CN108833441A (en) * | 2018-07-23 | 2018-11-16 | 中国联合网络通信集团有限公司 | The method for releasing and system of temporary destination node |
| CN111405131A (en) * | 2020-03-30 | 2020-07-10 | 深圳震有科技股份有限公司 | Method, system and storage medium for detecting far-end off-hook signal |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108848116A (en) * | 2018-09-05 | 2018-11-20 | 中国联合网络通信集团有限公司 | call recording method, device and storage medium |
-
2002
- 2002-11-14 CN CN 02152502 patent/CN1266901C/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100407854C (en) * | 2004-07-31 | 2008-07-30 | 华为技术有限公司 | Audio playing back method in wideband CDMA communication system |
| CN101258717B (en) * | 2005-11-25 | 2011-11-23 | 中兴通讯股份有限公司 | Medium gateway system and method for realizing medium gateway internal call |
| WO2007059650A1 (en) * | 2005-11-25 | 2007-05-31 | Zte Corporation | A media gateway system and a method for achieving the internal calling of the media gateway |
| CN1984177B (en) * | 2006-04-14 | 2011-04-06 | 华为技术有限公司 | System and method for realizing color bell service |
| WO2007131435A1 (en) * | 2006-05-09 | 2007-11-22 | Huawei Technologies Co., Ltd. | A calling method, system and msce over ip supporting |
| CN101056282B (en) * | 2006-06-20 | 2010-05-12 | 华为技术有限公司 | Implementation method, device and system of the random channel signaling under the H.248 separated architecture |
| CN101132348B (en) * | 2006-08-22 | 2011-05-25 | 中兴通讯股份有限公司 | Method for implementing IMS distinguished ring business by SIP signaling expansion |
| CN100461968C (en) * | 2006-09-29 | 2009-02-11 | 华为技术有限公司 | Method, system and media gateway for obtaining dialing number information |
| CN100452786C (en) * | 2006-10-16 | 2009-01-14 | 武汉市中光通信公司 | Large compositive gateway access system based on NGN |
| CN101207547B (en) * | 2006-12-20 | 2011-05-25 | 曲锐 | System and method for implementing intercommunication of public switched telephone network and IP network |
| CN101247313B (en) * | 2007-02-13 | 2010-11-10 | 中兴通讯股份有限公司 | Out-trunk call establishment method |
| CN101123593B (en) * | 2007-09-20 | 2010-06-09 | 中兴通讯股份有限公司 | Method for streaming implementation in media gateway control |
| WO2009046592A1 (en) * | 2007-10-10 | 2009-04-16 | Zte Corporation | A method, system and a mobile terminal for restraining ring in a mobile communication service |
| CN108833441A (en) * | 2018-07-23 | 2018-11-16 | 中国联合网络通信集团有限公司 | The method for releasing and system of temporary destination node |
| CN111405131A (en) * | 2020-03-30 | 2020-07-10 | 深圳震有科技股份有限公司 | Method, system and storage medium for detecting far-end off-hook signal |
| CN111405131B (en) * | 2020-03-30 | 2021-04-20 | 深圳震有科技股份有限公司 | Method, system and storage medium for detecting far-end off-hook signal |
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| CN1266901C (en) | 2006-07-26 |
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Granted publication date: 20060726 Termination date: 20121114 |