CN1980233B

CN1980233B - IP bearing-load control method for CDMA 2000 nuclear network

Info

Publication number: CN1980233B
Application number: CN2005101279094A
Authority: CN
Inventors: 胡元波; 马海波; 葛志明
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2005-12-07
Filing date: 2005-12-07
Publication date: 2011-05-11
Anticipated expiration: 2025-12-07
Also published as: CN1980233A

Abstract

The invention provides a bearing-control method for a CDMA2000 core network, which is characterized in that an H.248 protocol module drives an IP bearing-control module, and realizes the occupation or releasing of a local interface resource through interaction with a resource management module; the H.248 protocol module drives the IP bearing-control module, and finishes the procedure for building connection to inter-office load or releasing connection from the inter-office load through interaction with an RTP protocol module. The IP bearing-control method of the invention can effectively accomplish controlling of the RTP protocol module in the CDMA2000 system core network, and further reaches purpose of realizing controlling of the IP beared media channels. In addition, compared with flow for building IP bearing in WCDMAR4, the disclosed designed flow is more compact, and the efficiency is higher too.

Description

A kind of IP bear control method that is used for the CDMA2000 core net

Technical field

The present invention relates to the moving communicating field of CDMA2000.Specifically, this control method is used in the CDMA2000 core net, is used for controlling Media Stream establishment of connection and release based on the IP carrying between the core net media gateway MGW.

Background technology

Along with mobile communication system in the increasingly extensive application of every field such as economic and social life, mobile communication system technology itself is also among fast development, from at present just in widely used second generation mobile communication system, arrive ripe perfect 3-G (Generation Three mobile communication system), the demand of user for communication system satisfied in technical development day by day.3GPP of International Standards Organization and 3GPP2 are responsible for the formulation and the modification of 3-G (Generation Three mobile communication system) international standard WCDMA standard and CDMA2000 standard respectively.

In the 3-G (Generation Three mobile communication system) international standard, because the innovation of the network architecture, traditional moving exchanging center MSC is substituted by media gateway controller MGC and media gateway MGW, thereby realizes calling out and carrying the purpose that is separated.Wherein, transmit the signaling relevant between MGC and MGW, then need foundation to be used to transmit the medium face passage of medium face data (as: voice, data service, multimedia) between MGW and MGW with calling out control.

This medium face passage can be carried in WCDMA edition 4 (R4) on asynchronous transfer mode ATM or the Internet protocol IP transmission, then can only be carried in the IP transmission in the CDMA2000 standard.In order to control the foundation and the release of medium face passage, we need corresponding bearer control protocol entity.In the WCDMA edition 4, clearly defined the protocol entity that control is carried in such being used to, as: the IPBCP agreement that is used to control the ALCAP agreement of ATM carrying and is used to control the IP carrying.

Yet, in CDMA2000, do not have corresponding standard or agreement and come standard is carried out in the foundation and the maintenance of IP-based medium face carrying.This just needs the such cover flow process of our oneself design, controls the foundation and the release of IP-based medium face passage in the CDMA2000 core net.

In order to set forth related content of the present invention better, at first introduce in WCDMAR4 how to finish the foundation that IP carries here by IPBCP.

It is specific as follows that flow process is set up in the carrying of IPBCP routine:

1.MGW1 receive the ADD order of MGC1, require to set up a RTP terminal.

Set up request 2.H.248 send the IP carrying to IPBCP.

3.IPBCP reply to H.248 returning IP carrying foundation.

4.IPBCP to H.248 sending tunnel message.

5.H.248 return ADD.reply to MGC1, show that terminal adds successfully.

6.H.248 report NOTIFY to MGC1, and comprised the tunnel message of receiving from IPBCP therein, carried the address of the interface resource that IPBCP takies at local terminal in this tunnel message.

7.MGC1 NOTIFY responds to previous step.

8.MGC1 pass through the mutual of interoffice message with MGC2, the tunnel message of IPBCP has been passed to callee side, promptly the address of Calling Side MGW1 has been passed to callee side.

9.MGC2, H.248 set up an IP terminal on the request MGW2 by ADD order, in this ADD order, also carried the tunnel message of the IPBCP that transmits from MGW1 simultaneously, wherein comprised the address information of MGW1.

10.H.248 issue tunnel message to IPBCP, notify the address of its opposite end.

11.H.248 return ADD.reply to MGC2, the expression terminal is added successfully.

12.IPBCP set up the IP connection request to the RTP transmission.

Set up replying successfully 13.RTP return IP to IPBCP.

14.IPBCP H.248 send tunnel message to the local terminal upper-layer user, wherein carried the address information of local terminal and MGW2.

15.H.248 send the tunnel message of receiving from IPBCP to MGC2 by NOTIFY.

16.MGC2 the NOTIFY that receives made replys.

Set up indication 17.IPBCP H.248 send carrying to the local terminal upper-layer user.

18.MGC2 by interoffice message, the tunnel message of receiving is delivered to Calling Side, promptly the address information of MGW2 is passed to MGC1.

19.MGC1 H.248 tunnel message is handed down on the MGW1 by MODIFY order.

20.H.248 order is made and being replied to the MODIFY that receives.

21.H.248, promptly the address information of MGW2 is told to IPBCP to IPBCP transparent transmission tunnel message.

22.IPBCP initiate to set up the IP connection requests to RTP.

23.RTP setting up IP to the IPBCP transmission after carrying is set up successfully replys.

24.IPBCP report H.248 that to the local terminal upper-layer user carrying sets up acknowledge message.

25.H.248 finish to MGC1 report carrying foundation by NOTIFY.

26.MGC1 NOTIFY made replys.

Can see that from above process using IPBCP and tunnel message to set up IP carries among WCDMAR4, because the address information at link setup two ends is next mutual by tunnel message, so the process of setting up of whole media channel is quite complicated.

Arranged following term in this article:

The MGW media gateway

The MGC Media Gateway Controller

The IP Internet protocol

MSC mobile switching centre

The ATM asynchronous transfer mode

ALCAP inserts and connects the control applying portion

Agreement is set up in IPBCP IP carrying

The RTP RTP

H.248, in 8 orders that NOTIFY stipulates in the agreement one, MGW uses Notify order institute's event in MGC report MGW.

H.248, in 8 orders that MODIFY stipulates in the agreement one, MGC uses the Modify order can revise attribute, incident and the signal of a destination node among the MGW.

The SIP Session initiation Protocol

The PORT port numbers

Summary of the invention

Technical problem to be solved by this invention is exactly: finish the foundation and the release of the media channel that IP in the CDMA2000 core net is carried by a kind of agreement flow process of design voluntarily.By with WCDMA R4 in the contrast of setting up flow process of IP carrying, as can be seen the designed link setup flow process of the present invention have succinctly, characteristics of high efficiency.

A kind of IP bear control method that is used for the CDMA2000 core net is characterized in that, H.248 protocol module drives IP carrying control module, by with resource management module realize taking or discharge alternately to the local interface resource; H.248 protocol module drives IP carrying control module, mutual by with the Real-time Transport Protocol module, and the Media Gateway Controller at two ends is by sip message, the IP address and the port numbers of the ephemeral terminations of intercommunication opposite end, and the connection of finishing the interoffice carrying is set up or is connected dispose procedure.

In the said method, establish when participating in carrying and connecting the media gateway of setting up and be MGW1 and MGW2 respectively, described connection is set up process and be may further comprise the steps:

1) media gateway controller MGC 1 is added a temporary IP terminal RTP1 to media gateway MGW 1, and obtains its IP address ip 1 and PORT PORT1;

2) pass through the mutual of interoffice sip message, media gateway controller MGC 2 obtains IP address ip 1 and the PORT PORT1 of the IP ephemeral terminations RTP1 on the media gateway MGWs 1;

3) media gateway controller MGC 2 is added a temporary IP terminal RTP2 to media gateway MGW 2, and obtains its IP address ip 2 and PORT PORT2, and IP address ip 1 and the PORT PORT1 of notice media gateway MGW 2 opposite end RTP1; Media gateway MGW 2 has been finished the foundation of the IP carrying of leading to media gateway MGW 1 after these information of acquisition;

4) media gateway controller MGC 1 obtains IP address ip 2 and the PORT PORT2 of RTP2 from media gateway controller MGC 2 by sip message;

5) IP address ip 2 and the PORT PORT2 of media gateway controller MGC 1 notice media gateway MGW 1 opposite end RTP2; Media gateway MGW 1 is accomplished to the foundation of the IP tunnel of media gateway MGW 2; So far, the IP bearer path between media gateway MGW 1 and the media gateway MGW 2 is all got through, and two gateways switched-media have mutually flowed.

In the said method, described connection dispose procedure may further comprise the steps:

1) after media gateway MGW is received request, require IP carrying control module to send the request message of releasing bearing to the Real-time Transport Protocol module; IP carrying control module correspondingly enters release condition;

2) receive that the Real-time Transport Protocol module discharges successful message after, IP carrying control module is to resource management module release local terminal IP interface resource; Send carrying to protocol module H.248 then and discharge success message, the process of notifying protocol module H.248 to discharge the IP carrying is finished;

3) discharge the link maintenance data field that IP carries control module.

Adopt IP bear control method of the present invention, in CDMA2000 system core net, can finish control effectively, and then realize purpose that the media channel of IP carrying is controlled the Real-time Transport Protocol module.In addition, compare with the flow process of setting up of IP carrying among the WCDMA R4, the present invention is designed, and to set up flow process more succinct, and efficient is also higher.

Description of drawings

Fig. 1 is the position view of IP bearer control function of the present invention in system;

Fig. 2 is an IP bearer control function model schematic diagram of the present invention;

Fig. 3 is the connection building process schematic diagram of IP bearer control function of the present invention;

Fig. 4 is that the connection of IP bearer control function of the present invention discharges schematic flow sheet.

Embodiment

Come method of the present invention is described in detail below in conjunction with accompanying drawing.

The position of IP bearer control function of the present invention in system as shown in Figure 1, IP bearer control function model of the present invention illustrates in summary of the invention as shown in Figure 2, repeats no more here.

With reference to Fig. 3, the link setup process of IP bearer control function has following steps:

1. the MGW1 of media gateway controller MGC 1 in the media gateway MGW that two preparations are conversed adds a local terminal, two $ in the Add order, represent the H.248 optional RTP terminal on the MGC1 indication MGW1, and be reported as the selected IP of this RTP terminal and PORT number to MGC1.

2.MGW1 on H.248 generate local ephemeral terminations RTP1, and the IP carrying control module of request local terminal takies local interface board resource.

3.IP the carrying control module is after obtaining interface resource success, to the information of echo reply and occupied interface resource H.248.

4. subsequently, the Reply that H.248 orders by Add returns the local ephemeral terminations that generates and the IP address ip 1 and the PORT PORT1 of this terminal to MGC1.

5.MGC1 the interface message of MGW1 is notified to the gateway controller MGC2 of called office by sip message.

6.MGC2 after the address information that obtains RTP1 terminal on the MGW1, add another terminal, and in the Add order, carried the IP address ip 1 and the PORT PORT1 of the RTP1 terminal that from MGW1, obtains to MGW2.

7.MGW2 on H.248 receive Add order after, by resolving the IP address of finding the opposite end, so notice IP carrying control module takies the interface resource of local terminal, and be established to opposite end office's IP carrying of MGW1 just (H.248 tell the IP1 of MGW1 and PORT1 to IP carrying control module this moment).

8.IP the carrying control module is initiated request to RTP after taking the success of local interface resource, require RTP to be established to the IP carrying of MGW1.

9.RTP after the link setup success, to IP carrying control module echo reply.

10.IP carrying has been after control module received replying of RTP, to echo reply message H.248, tells H.248 link setup success, and address information IP2 and the PORT2 of the interface resource RTP2 that H.248 takies at local terminal of notice.

11.H.248 after receiving that IP carries replying of control module, return the Reply of Add order, and in this Reply, notify the address information IP2 and the PORT2 of MGC2RTP2 terminal to MGC2.So far, the interoffice carrying on the MGW2 has just been set up and has been finished, and MGW2 has possessed the condition of carrying out interoffice communication with MGW1.

12.MGC2 the interface message of MGW2 is passed to MGC1 by sip message.

13.MGC1 after obtaining the address of RTP2, notify RTP1, the address information IP2 of opposite end RTP2 and PORT2 by the Modify order.

Carry foundation 14.H.248 utilize the address information request IP carrying control module of the RTP2 of MGC 1 notice.

15.IP sending to RTP, the carrying control module connects the request of foundation.

16.RTP after the link setup success, return the link setup successful respond to IP carrying control module.

17.IP the carrying control module is returned carrying to H248 and is set up successfully affirmation.

18.H248 after obtaining carrying foundation affirmation, return replying of Modify order to MGC1, the carrying of expression MGW1 is set up successfully.

So far, whole RTP carrying is set up flow process and has been finished.Build up carrying between MGW1 and the MGW2, thereby possessed the condition of carrying out interoffice communication.

We can see to set up flow process from above-mentioned carrying, whole process is compared with the similar flow process of WCDMA R4, finish same function, the mutual information of each intermodule greatly reduces the designed flow process of the present invention in the link setup process owing to thereby the address information that does not need to use tunnel message to exchange the link setup two ends makes, orderliness is also more clear, makes operational efficiency improve greatly.

With reference to Fig. 4, the link dispose procedure of IP carrying control module has the following steps:

On the media gateway MGW H.248 after the request of the SUB RTP terminal of having received MGC, require IP carrying control module to send the request message of releasing bearing to the RTP module; IP carrying control module correspondingly enters into release condition.

2. after receiving that connection that the Real-time Transport Protocol module returns discharges successful message, IP carrying control module is released in connection to resource management module and sets up the local terminal IP interface resource of applying in the process; Can continue to use this resource in the process so that set up in connection subsequently.Send carrying to protocol module H.248 then and discharge success message, the process of notifying module H.248 to discharge the IP carrying is finished.

3. discharge the link maintenance data field of IP carrying control module.

So far, the dispose procedure of entire I P carrying has been all over.

Claims

1. an IP bear control method that is used for the CDMA2000 core net is characterized in that, H.248 protocol module drives IP carrying control module, by with resource management module realize taking or discharge alternately to the local interface resource; H.248 protocol module drives IP carrying control module, mutual by with the Real-time Transport Protocol module, and the Media Gateway Controller at two ends is by sip message, the IP address and the port numbers of the ephemeral terminations of intercommunication opposite end, and the connection of finishing the interoffice carrying is set up or is connected dispose procedure.

2. the IP bear control method that is used for the CDMA2000 core net according to claim 1 is characterized in that, when the media gateway that participation carrying connection is set up was MGW1 and MGW2 respectively, described connection was set up process and be may further comprise the steps:

5) IP address ip 2 and the PORT PORT2 of media gateway controller MGC 1 notice media gateway MGW 1 opposite end RTP2; Media gateway MGW 1 is accomplished to the foundation of the IP tunnel of media gateway MGW 2; IP bearer path between two gateways is all got through.

3. the IP bear control method that is used for the CDMA2000 core net according to claim 1 is characterized in that, described connection dispose procedure may further comprise the steps:

3) discharge the link maintenance data field that IP carries control module.