CN1677972A - Method and system for duplicating medium flow in next-generation network - Google Patents
Method and system for duplicating medium flow in next-generation network Download PDFInfo
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- CN1677972A CN1677972A CN 200410033178 CN200410033178A CN1677972A CN 1677972 A CN1677972 A CN 1677972A CN 200410033178 CN200410033178 CN 200410033178 CN 200410033178 A CN200410033178 A CN 200410033178A CN 1677972 A CN1677972 A CN 1677972A
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Abstract
The disclosed method and system is in use for solving issues of communications memo and network security etc. The method includes steps: backup system sends first type message of media stream of backup user to next generation network (NGN) in order to appoint user needed to carrying out backup of media flow; when being detected appointed backup user of participating in calling, soft exchange equipment in NGN directs device of possessing function for replicating media to copy media flows from each parties in call, as well as sends second type message including progress information in call setup procedure to backup system, and receives third message of media flow; after carrying out mixing and copying media flow from each parties in call the appointed backup user participates, the device of possessing function for replicating media sends the mixed and copied media flow to backup system for media stream; the backup system receives and processes user media flow.
Description
Technical field
The present invention relates to next generation network technology, relate in particular to the method for backup user media stream in next generation network, and the network system that realizes this method.
Background technology
Next generation network (NGN) is based on the comprehensive network of grouping, and telecommunication service can be provided.NGN is the tranmission techniques that utilizes multiple broadband ability and Quality of Service to guarantee; Its professional correlation function is independent mutually with its tranmission techniques.NGN has not only carried all business of original Public Switched Telephone Network, simultaneously great amount of data transmission is unloaded in the IP network to alleviate the heavy burden of PSTN network, and the new features with the IP technology increase and strengthened many old and new's business again.NGN combines the advantage of fixed-line telephone network, mobile telephone network and IP network, makes analog subscriber, digital subscriber, mobile subscriber, ADSL user, isdn user, IP narrowband network user, IP broadband network user or even the user who inserts via satellite to intercom mutually as a member in the next generation network.
Along with the evolution of communication network to NGN, network configuration, huge variation all will take place in communication mode and communication service, how in NGN, realize the duplicating of user media stream, backup functionality, satisfy demand, become NGN Virtual network operator and equipment vendor's urgent problem aspects such as communication memorandum, network monitoring and network securitys.
Summary of the invention
The invention provides a kind of method and system that backup media flows in next generation network, to satisfy demand to communication memorandum, network monitoring and network security.
The invention provides following technical scheme:
A kind of method that backup media flows in next generation network comprises step:
Send the first kind message of backup user media stream to specify the user that need carry out the Media Stream backup by standby system to next generation network (NGN);
Softswitch among the NGN is indicated the Media Stream of this calling each side of device replication with medium replication function when the backup user who detects appointment participates in calling out, and comprises second class message of the progress information in the call establishment and the 3rd class message of receiving media stream to the standby system transmission;
After duplicating, the Media Stream of the each side in the calling that described equipment with medium replication function participates in the backup user of described appointment sends to the Media Stream standby system;
Standby system receives user media stream and handles.
According to said method:
Described equipment with medium replication function is to increase the backup gateway that is arranged among the NGN, and this backup gateway provides unified access address and mutual with standby system to standby system.Softswitch is controlled each side in this calling when the backup user who detects appointment participates in calling out Media Stream is rerouted to backup gateway.
Soft exchange device controls user media stream is changed to backup gateway and is comprised step: the order of Softswitch user's allocation medium flow port in backup gateway issues to this time calling; Backup gateway is user's allocation medium flow port and to Softswitch echo reply message; Softswitch obtains described port information from described response message, and respectively in this calling each user place access device issue the media redirection order that comprises corresponding port information; Each user place access device is according to described media redirection order, and user's Media Stream is rerouted to corresponding port on the backup gateway.
Described equipment with medium replication function is the access device among the NGN, and is mutual by access device and standby system.
Backup gateway or access device are transparent to Softswitch with this message when receiving the first kind message of standby system; When second class message that receives Softswitch and the 3rd class message, message is transparent to standby system.
A kind of network system comprises: Softswitch, the access device that is connected with Softswitch; With the backup gateway that Softswitch is connected with access device, the standby system that is connected with this backup gateway; Described backup gateway sends the backup user media message that standby system issues to Softswitch, soft exchange device controls has the Media Stream of each side in the calling that the backup user of appointment participates in through backup gateway, by the backup gateway duplicate media stream and send to standby system.
A kind of network system comprises: Softswitch, the access device that is connected with Softswitch; The standby system that is connected with described access device; Described access device sends the backup user media flow message that standby system issues to Softswitch, and the Media Stream of the each side in the calling that the soft exchange device controls access device participates in the backup user that appointment is arranged duplicates and send to standby system.
Described access device comprises integrated access equipment, IAD and soft switch phone.
The present invention has following beneficial effect:
1, solved the Media Stream backup problem of video and multi-media voice user in the NGN network.
2, shield NGN network internal structure and realization by backup gateway, simplified the relation of NGN and standby system.
3, the media stream duplication function is realized by single backup gateway, can change the gateway device of existing NGN network.
4, backup gateway provides the access authentication function, prevents that illegality equipment from receiving backup media stream.
Description of drawings
Fig. 1 is the networking structure schematic diagram of the embodiment of the invention one;
Fig. 2 A is the flow chart of backup user media stream in network configuration shown in Figure 1;
Fig. 2 B is the flow chart of soft exchange device controls Media Stream changed course;
Fig. 3 is the networking structure schematic diagram of the embodiment of the invention two;
Fig. 4 is the flow chart of backup user media stream in network configuration shown in Figure 3.
Embodiment
Embodiment one
Present embodiment is introduced the backup that the backup gateway with medium replication function realizes comprising Media Streams such as video and multi-media voice in NGN standard network framework.
Consult shown in Figure 1ly, network system of the present invention comprises next generation network (NGN) and standby system.Next generation network comprises Softswitch (Softswitch), access device and backup gateway.Softswitch is to handle call signaling in the NGN network, call out control and realize professional nucleus equipment.Access device is connected with Softswitch, user terminal is inserted the NGN network, this access device comprises IAD (AccessGateway, AG), integrated access equipment (Integrated Access Device, IAD), soft switch phone (Soft Phone) and other can realize the equipment of identical function.Backup gateway is connected with each access device with Softswitch respectively, and being used for provides unified media stream duplication backup address of NGN network and related news interface to the Media Stream standby system, realizes the copy function of Media Stream.Wherein the media stream duplication backup address can be the IP address, also can be the DNS domain name.Standby system is connected with backup gateway, is used for the Media Stream of stored calls each side, also can handle Media Stream as required simultaneously.Standby system can be single backup server, also can be the complication system that is made of gateway and other treatment facilities, and this system can carry out various processing to the user media of backup.
Backup gateway and standby system mainly contain three class interface message, and (consult the dotted portion between the Softswitch and standby system among Fig. 1, this dotted line only is used to represent rising, ending of message, is not illustrated between switching equipment and standby system directly to send.Fig. 3 is in like manner):
First kind message is used to specify the user profile that needs backup media stream, sends to backup gateway by standby system.Transparent transmission was transmitted to Softswitch after backup gateway was received first kind message, and Softswitch is provided with backup mark according to the user profile in the first kind message in this user data of users.
The life event that the second class message is used to indicate the user who needs the backup communication Media Stream sends to backup gateway by soft switch.Backup gateway passes through standby system after receiving the second class message, is handled by standby system.
The 3rd class message is used to notify information such as standby system address that the backup media that preparation receives flows and encoding and decoding, sends to backup gateway by soft switch.Backup gateway passes through standby system after receiving the 3rd class message, is handled accordingly by standby system.
Specific fields in the message header of first kind message, the second class message and the 3rd class message has different information, and gateway is discerned the classification of the message of receiving by this information.
In order to prevent arbitrarily user media stream to be backed up, on backup gateway, set up authentication (or claiming authentication) data, when inserting backup gateway, the standby system request need provide user data such as user name, password.Allow to insert if authentication is passed through, otherwise refusal inserts.
Because in the prior art, be by the user of each side in the link call establishment between access device under the control of Softswitch, and have only backup gateway just to have the copy function of user media stream in Fig. 1 structure, therefore, when the backup user that soft switch detects appointment participates in calling out, control this time each user media stream in calling out and be rerouted to backup gateway, each user media stream in calling out is mixed and duplicate by backup gateway, send to standby system then.
Consult shown in Fig. 2 A, the detailed process of backup user media stream is as follows:
Step 10: the standby system request inserts backup gateway, and username and password is provided.
Step 20: backup gateway authenticates standby system according to the username and password that the verify data of preserving and standby system provide, if by authentication then carry out step 30, otherwise refusal inserts request and finishes.
Step 30: standby system issues backup command to backup gateway by first kind message, comprises by standby user's relevant information in this first kind message, as Subscriber Number, address etc.As specifying user A is backed up.
Step 40: backup gateway finds that through the message header analysis it is first kind message that standby system sends, and then this forwards is arrived Softswitch (Softswitch), is handled by Softswitch.
Step 50: Softswitch (Softswitch) is provided with backup mark after receiving that backup gateway is transmitted next backup Indication message in the backup user data of users of appointment.
Step 60: the backup user of appointment makes a call (as user A calling party B) or during by other customer calls (as user B calling party A), Softswitch is checked through to be called out the backup user that appointment is arranged and participates in, and the backup user's of appointment the Media Stream and the Media Stream of another calling user all are rerouted to backup gateway.Simultaneously, Softswitch sends to backup gateway with the progress information in the call establishment by the second class message, is forwarded to standby system again by backup gateway.
Progress information in the call establishment comprises information such as user's off-hook, ring and call setup.Call out release information and also send to backup gateway, be forwarded to standby system by backup gateway by the second class message.
For the calling that the backup user who does not have appointment participates in, still handle by the control flow of prior art.
Step 70: after the calling and called Media Stream all is rerouted to backup gateway, Softswitch indication backup gateway carries out the mixing of calling and called medium and duplicates, receive by the 3rd class message indication standby system, the Media Stream that will duplicate out simultaneously sends to standby system.
As: the audio mixing bag indication backup gateway of the H.248 agreement by expansion, the Media Stream that backup gateway then utilizes existing digital signal processor (DSP) audio mixing algorithm that calling and called port on the dsp chip is received mixes.
If the 3rd message is by User Datagram Protoco (UDP) (DSP) carrying, standby system is replied response after receiving the 3rd message, if response is not received in soft switch in the given time, then resends the 3rd message.
Step 80: standby system receives backup media stream and handles accordingly.As preserving, analyze etc.
Consult shown in Fig. 2 B, in the above-mentioned steps 60, the changed course of soft exchange device controls Media Stream may further comprise the steps:
Step 601: Softswitch issues order into caller and called users allocation medium flow port to backup gateway.As by the H.248 Add order of agreement, indicate backup gateway to give calling and called allocation medium flow port respectively.
Step 602: backup gateway is a calling and called user allocation medium flow port and to Softswitch echo reply message.As passing through the H.248 Add transmitting order to lower levels of agreement, then return the port information of distribution with Add Reply message.
Step 603: Softswitch obtains described port information from described response message, and issues the Media Stream changed course order that agreement is supported to calling and called place access device respectively, carries corresponding ports information in this order.As the H.248 Mofify of agreement order, the MOD order of MGCP agreement, the re-INVITE of Session Initiation Protocol or the Facility message of agreement H.323.
Step 604: calling and called place access device is according to described Media Stream changed course order, respectively the Media Stream of caller and called users is rerouted on the corresponding port that backup gateway distributed.
In addition, backup gateway also can provide Qos functions such as firewall functionality and traffic classification, provides firewall functionality can prevent self and NGN network under fire.Provide traffic classification etc. can solve the delivery quality and the real time inspection quality problems of backup media stream.
Embodiment two
Present embodiment provides the media stream duplication function to realize comprising the Media Stream backup (backup gateway promptly is set) of video and multi-media voice by each access device in the NGN network.
Consult shown in Figure 3ly, network system of the present invention comprises next generation network (NGN) and standby system.The NGN network architecture is not changed, and standby system is connected with each access device in the NGN network, and each access device provides the media stream duplication function, and standby system is finished Media Stream voluntarily and mixed.Access device comprise IAD (Access Gateway, AG), integrated access equipment (Integrated Access Device, IAD), SoftPhone and other can realize the equipment of identical function.
Standby system issues the backup indication to Softswitch, the backup user of Softswitch record appointment when the backup user who detects appointment participates in calling out, expands by the agreement that access device is supported, during the conversation of indication access device, duplicate a medium to backup gateway.
Access device and standby system mainly contain first kind message, the second class message and the 3rd class message, and its effect is identical with embodiment one with the identification to these message.
In order to prevent arbitrarily user media stream to be backed up, on access device, set up authentication (or claiming authentication) data, when inserting, the standby system request need provide user data such as user name, password.Allow to insert if authentication is passed through, otherwise refusal inserts.
Consult shown in Figure 4, the detailed process following (access device is example with the IAD) of backup user media stream:
Step 100: the IAD of standby system in the NGN network sends the request of access, and username and password is provided.
Step 110: IAD authenticates standby system according to the username and password that the verify data of preserving and standby system provide, if by authentication then carry out step 120, otherwise refusal inserts request and finishes.
Step 120: standby system issues backup command to IAD by first kind message, comprises by standby user's relevant information in this first kind message, as Subscriber Number, address etc.As specifying user B is backed up.
Step 130: IAD finds that through the message header analysis it is first kind message that standby system sends, and then this forwards is arrived Softswitch (Softswitch), is handled by Softswitch.
Step 140: Softswitch (Softswitch) is provided with backup mark after receiving that IAD is transmitted next backup Indication message in the backup user data of users of appointment.
Step 150: the backup user of appointment makes a call (as user B calling party A) or during by other customer calls (as user A calling party B), Softswitch is checked through calls out the backup user participation that appointment is arranged, and then notifies the IAD duplicate media stream at calling and called place and sends to standby system; Simultaneously, Softswitch sends to IAD with the backup progress information in the call establishment by the second class message, be forwarded to standby system again by IAD, Softswitch mixes voluntarily by the 3rd class message informing standby system receiving media stream and by standby system again.
Step 160: the IAD at calling and called place duplicates a Media Stream voluntarily and sends to standby system.
Step 170: standby system receives calling and called user's Media Stream, and mixes and other processing.As preserving, analyze etc.
When access device was Integrated Access Device and SoftPhone, its process was identical with IAD.
The present invention duplicates the Media Stream of designated user by set up backup gateway at the NGN network, or increase medium replication function comes the Media Stream of designated user is duplicated on existing gateway, realized the Media Stream backup of video, multi-media voice user in the NGN network, can satisfy the demand of operator communication memorandum and network security.
Claims (13)
1, a kind of method that backup media flows in next generation network is characterized in that comprising step:
Send the first kind message of backup user media stream to specify the user that need carry out the Media Stream backup by standby system to next generation network (NGN);
Softswitch among the NGN is indicated the Media Stream of this calling each side of device replication with medium replication function when the backup user who detects appointment participates in calling out, and comprises second class message of the progress information in the call establishment and the 3rd class message of receiving media stream to the standby system transmission;
After duplicating, the Media Stream of the each side in the calling that described equipment with medium replication function participates in the backup user of described appointment sends to the Media Stream standby system;
Standby system receives user media stream and handles.
2, the method for claim 1 is characterized in that, described equipment with medium replication function is to increase the backup gateway that is arranged among the NGN, and this backup gateway provides unified access address and mutual with standby system to standby system.
3, method as claimed in claim 2 is characterized in that, Softswitch is controlled each side in this calling when the backup user who detects appointment participates in calling out Media Stream is rerouted to backup gateway.
4, method as claimed in claim 3 is characterized in that, soft exchange device controls user media stream is changed to backup gateway and comprised step:
The order of Softswitch user's allocation medium flow port in backup gateway issues to this time calling;
Backup gateway is user's allocation medium flow port and to Softswitch echo reply message;
Softswitch obtains described port information from described response message, and respectively in this calling each user place access device issue the media redirection order that comprises corresponding port information;
Each user place access device is according to described media redirection order, and user's Media Stream is rerouted to corresponding port on the backup gateway.
5, method as claimed in claim 3 is characterized in that, the Media Stream of each side carried out mixed processing during backup gateway will be called out before duplicate media stream.
6, the method for claim 1 is characterized in that, described equipment with medium replication function is the access device among the NGN, and is mutual by this access device and standby system.
As each described method of claim 2 to 6, it is characterized in that 7, backup gateway or access device are transparent to Softswitch with this message when receiving the first kind message of standby system; When second class message that receives Softswitch and the 3rd class message, message is transparent to standby system.
8, method as claimed in claim 7 is characterized in that, according to the information in this message standby system is authenticated before Softswitch in transparent transmission first kind message, if by authenticating then this message of transparent transmission, otherwise abandons this message.
9, the method for claim 1, it is characterized in that, Softswitch is provided with backup mark in the backup user data of users of appointment when receiving first kind message, and judge whether that by the backup mark in the inquiring user data backup user of appointment participates in calling out when producing calling.
10, a kind of network system comprises Softswitch, the access device that is connected with Softswitch; It is characterized in that also comprising the backup gateway that is connected with access device with Softswitch, the standby system that is connected with this backup gateway; Described backup gateway sends the backup user media message that standby system issues to Softswitch, soft exchange device controls has the Media Stream of each side in the calling that the backup user of appointment participates in through backup gateway, by the backup gateway duplicate media stream and send to standby system.
11, network system as claimed in claim 10, described access device comprise integrated access equipment, IAD and soft switch phone.
12, a kind of network system comprises Softswitch, the access device that is connected with Softswitch; It is characterized in that also comprising the standby system that is connected with described access device; Described access device sends the backup user media flow message that standby system issues to Softswitch, and the Media Stream of the each side in the calling that the soft exchange device controls access device participates in the backup user that appointment is arranged duplicates and send to standby system.
13, network system as claimed in claim 12, described access device comprise integrated access equipment, IAD and soft switch phone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100331782A CN100527727C (en) | 2004-04-02 | 2004-04-02 | Method and system for duplicating medium flow in next-generation network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100331782A CN100527727C (en) | 2004-04-02 | 2004-04-02 | Method and system for duplicating medium flow in next-generation network |
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| Publication Number | Publication Date |
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| CN1677972A true CN1677972A (en) | 2005-10-05 |
| CN100527727C CN100527727C (en) | 2009-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100331782A Expired - Fee Related CN100527727C (en) | 2004-04-02 | 2004-04-02 | Method and system for duplicating medium flow in next-generation network |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100420205C (en) * | 2006-03-08 | 2008-09-17 | 华为技术有限公司 | Soft exchange fault-tolerant processing method and implementing system |
| CN102332991A (en) * | 2011-09-07 | 2012-01-25 | 河北远东哈里斯通信有限公司 | Backup method capable of keeping consistent state in soft switch and gateway device |
| CN101447893B (en) * | 2008-12-31 | 2012-04-25 | 华为技术有限公司 | Method for backing up multimedia business, system thereof, terminal thereof and calling session control server |
| CN103685144A (en) * | 2012-08-31 | 2014-03-26 | 中兴通讯股份有限公司 | Media stream transmission method and device |
-
2004
- 2004-04-02 CN CNB2004100331782A patent/CN100527727C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100420205C (en) * | 2006-03-08 | 2008-09-17 | 华为技术有限公司 | Soft exchange fault-tolerant processing method and implementing system |
| CN101447893B (en) * | 2008-12-31 | 2012-04-25 | 华为技术有限公司 | Method for backing up multimedia business, system thereof, terminal thereof and calling session control server |
| CN102332991A (en) * | 2011-09-07 | 2012-01-25 | 河北远东哈里斯通信有限公司 | Backup method capable of keeping consistent state in soft switch and gateway device |
| CN102332991B (en) * | 2011-09-07 | 2013-06-26 | 河北远东哈里斯通信有限公司 | Backup method capable of keeping consistent state in soft switch and gateway device |
| CN103685144A (en) * | 2012-08-31 | 2014-03-26 | 中兴通讯股份有限公司 | Media stream transmission method and device |
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| Publication number | Publication date |
|---|---|
| CN100527727C (en) | 2009-08-12 |
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Granted publication date: 20090812 |