CN1327719C - Method of sharing IWF source apparatus - Google Patents

Abstract

The present invention relates to a method of sharing IWF source equipment, which comprises the steps that A) users' data service is switched to an MGW with the IWF resource equipment for processing by the control of a medium gateway (MGW) with a medium gateway controller (MGC); B) after the data is processed by the IWF resource equipment, the data is transmitted to data service receiving equipment. The present invention ensures that the IWF resource equipment can be shared by a plurality of MGWs, and thus, the present invention saves the IWF resource equipment and network cost; the number of the IWF resource equipment can be slowly increased, and the sharing range can be reduced along with the gradual increase of the service amount. As a result, the cost of network establishment can be effectively controlled.

Description

A method for sharing IWF resource equipment

technical field

The invention relates to network equipment, in particular to a method for sharing IWF (Interworking Function) resource equipment.

Background technique

In the 3G wireless network, the circuit domain data services (video services, fax, Internet access, etc.) of mobile phone users are processed on a resource device called IWF. The number is also very small. Usually, an MSC (Mobile Switching Center) will configure IWF resource devices with a certain number of channels, and most of the IWF resource devices are external devices. When the device capacity is too small, the cost of its fixed configuration is relatively high. Figure 1 is a common networking diagram, in which MGC (Media Gateway Controller) and MGW (Media Gateway) form an MSC. Each MGW located in the end office needs to be configured with an IWF resource device. The solid curve is the data flow between the mobile phone and the landline, and the dotted curve is the data flow between the mobile phones. MGC completes call control-related processing, and MGW completes media stream conversion and media stream bearer functions (the operation and control process between them can refer to ITU-T H.248, Q.1950, Q.1902.3, Q.1902.4 and other related protocols ).

In the prior art, the IWF resource device is usually occupied by one MGW, and each MGW has one IWF resource device. In the case of small-capacity networking, because each MGW needs to configure an IWF resource device, the IWF resource device cannot be shared, and the cost is high.

Contents of the invention

The present invention provides a method for sharing IWF resource devices, which reduces the number of IWF resource devices in the case of small-capacity networking, so that the IWF resource devices are shared among multiple MGWs, avoiding the need to configure IWF resources for each MGW equipment, reducing the cost of networking.

The method for sharing IWF resource equipment of the present invention comprises the following steps:

A) The media gateway controller (MGC) controls the media gateway (MGW) to transfer the user's data service to the MGW equipped with IWF resource equipment for processing;

B) After being processed by the IWF resource device, the data is transmitted to the data service receiving device.

If it is indicated as a data service during the call setup phase, said step B) comprises the following steps:

B1) Send the data processed by the IWF resource device to the mobile gateway switching center (GMSC) or to the gateway or switch of the data service receiving device;

B2) The GMSC, the gateway or the switch transparently transmits the data to the data service receiving device.

If it is indicated as a data service during the call setup stage, said step B) may also include the following steps:

B1) The MGC controls and forwards the data processed by the IWF resource device back to the MGW accessed by the user;

B2) The MGW sends the data to the mobile gateway switching center (GMSC) or to the gateway or switch of the data service receiving device;

B3) The GMSC, the gateway or the switch transmits the data to the data service receiving device.

If it is a voice service at the call setup stage, when the user switches to a data service during a conversation, said step B) includes the following steps:

B1) The MGC controls and forwards the data processed by the IWF resource device back to the MGW accessed by the user;

B2) The MGW sends the data to the mobile gateway switching center (GMSC) or to the gateway or switch of the data service receiving device;

B3) The GMSC, the gateway or the switch transmits the data to the data service receiving device.

When the user initiates a data service call, the step A) further includes the following steps:

A1) Determine whether the user's access gateway (assumed to be MGW B) is configured with an IWF resource device. If so, the IWF resource device of the gateway performs data processing, and directly transmits the data to the gateway of the data service receiving device or switch; if no, follow the steps below;

A2) MGC allocates an IWF channel for the user at the gateway (assumed to be MGW A) configured with IWF resource equipment;

A3) The MGC connects the endpoints on MGW A and MGW B;

A4) The MGC calls the mobile gateway switching center (GMSC) or the gateway or switch to the data service receiving device through signaling, and controls the MGW A to establish the bearer to the GMSC, gateway or switch.

In the 3G network, there is also a step in which the MGC allocates a rate adapter on the MGW B accessed by the user, so as to adapt the transmitted data to the rate of the core network.

When the user switches from voice to data service, said step A) further includes the following steps:

A1) Determine whether the user's access gateway (assumed to be MGWB) is configured with an IWF resource device. If so, the IWF resource device of the gateway performs data processing and directly transmits the data to the gateway of the data service receiving device or switch; if no, follow the steps below;

A2) The MGC adds a first new endpoint and a second new endpoint on the gateway (assumed to be MGW A) configured with an IWF resource device, and allocates an IWF channel;

A3) The MGC adds a first newly added endpoint and a second newly added endpoint on the user's access gateway MGW B, and indicates that the first newly added endpoint is bidirectionally connected to the first endpoint on MGW B, and the second newly added endpoint Two-way connection with the second endpoint on MGW B; there is no connection between the original first endpoint and the second endpoint of MGW B

A4) The MGC connects the first newly added endpoint of MGW A to the first newly added endpoint of MGW B, and connects the second newly added endpoint of MGW A to the second newly added endpoint of MGW B;

Described step B) further comprises the steps:

B1) The MGC forwards the data processed by the IWF resource device back to the MGW B accessed by the user;

B2) The MGW B sends the processed data to the mobile gateway switching center (GMSC) or to the gateway or switch of the data service receiving device;

B3) The GMSC, the gateway or the switch transmits the data to the data service receiving device.

If the user switches from MGW B to another gateway MGW C, then further perform the following steps:

Add a third newly added endpoint on MGW A, the second newly added endpoint on MGW A and the third newly added endpoint are unidirectionally connected, and the connection direction is from the second newly added endpoint to the third newly added endpoint;

Add the first end point and the second end point on MGW C, the connection between the two end points is unidirectional, and the connection direction is from the second end point to the first end point;

Set up the unidirectional connection of the third new endpoint of MGW A to the first endpoint link of new gateway MGW C;

Delete the first newly-added endpoint connection of MGW B to the first newly-added endpoint of MGW A;

Change the connection between the second newly added end point of MGW A to the first end point link of MGW C into a bidirectional connection.

The application of the above method in the 3G network also includes the step of the MGC distributing codecs between the first endpoint and the second endpoint on the MGW C accessed by the user, so as to adapt the transmitted data to the rate of the core network.

The present invention enables one IWF resource device to be shared by multiple MGWs, saving IWF resource devices and network costs; with the gradual increase of business volume, the number of IWF resource devices can be gradually increased, and the sharing range can be reduced, so that the network can be established The cost can be effectively controlled.

Description of drawings

FIG. 1 is a schematic diagram of data flow when an IWF resource device performs data service processing in the prior art.

FIG. 2 is a schematic diagram of data flow during data service processing under the situation of IWF resource device sharing in the present invention.

FIG. 3 is one of the schematic diagrams of signal transmission in the case of IWF resource device sharing in the present invention.

FIG. 4 is the second schematic diagram of signal transmission in the case of IWF resource device sharing in the present invention.

FIG. 5 is a third schematic diagram of signal transmission in the case of IWF resource device sharing in the present invention.

FIG. 6 is a fourth schematic diagram of signal transmission in the case of IWF resource device sharing according to the present invention.

Detailed ways

The basic method of the present invention is: the MGC controls the MGW to transfer the user's data service to the MGW with IWF resource equipment for processing, and then directly transparently transmits it to the receiving party or transfers it back to the accessed MGW according to the situation after the processing is completed. When the call establishment phase indicates that it is a data service, it can be directly transparently transmitted, or it can be transmitted back to the connected MGW B; when the call establishment phase is a voice service, and the user switches to the data service during the call, it must Then switch back to the connected MGW). As shown in Figure 2, the solid curve represents the direct transparent transmission service. User B connects to the fixed network FAX equipment through MGW B first. The call of B is transferred to MGW A. On MGW A, after being processed by the IWF resource device, the data is sent to the mobile gateway switching center GMSC (or the gateway or switch of the data service receiving device, etc.), and then transparently transmitted to FAX user. In some cases, the user has established a voice service with other users. At this time, when the two parties switch to the data service, the MGC needs to forward the data processed by the IWF of MGW A back to MGW B, and then send it to the gateway through MGW B GMSC in the central office, and then to the fixed network equipment, as shown in the dotted curve (the purpose of this is to reduce the impact on the external network, because the right side of MGW B has established a voice bearer with other equipment during the voice call phase, when the service is switched , the session bearer will not be released, and the system needs to transmit data services on this bearer. Therefore, the data flow processed by the IWF of MGW A needs to be transferred back to MGW B. This process is invisible to the right side of MGW B. If this is not done, then it is necessary to re-establish the bearer from MGW A to the user talking with user B, which will have a greater impact on the entire system).

The following takes the H.248 protocol control process as an example to describe the specific implementation process of the method of the present invention.

The specific implementation process of the solid curve process shown in Figure 2 is as follows:

1. According to the call information of the user, the MGC finds that the user is calling for a data service, and determines that the IWF resource device needs to be used.

2. Since the MGW B accessed by the user does not have an IWF resource device, the MGC allocates an IWF channel for it on MGW A.

3. The MGC allocates a rate adapter (which can be used to adapt the air interface of the data service to 64Kbps) on the MGW B accessed by the user to adapt the data transmitted from the IU interface of the RNC (Radio Network Controller) to the core network s speed. This step can be omitted in the 2G GSM network A interface, but it is necessary in the 3G network (the reference protocol for adaptation is TS 29007).

4. The MGC connects several endpoints T1, T2, T3, and T4 on MGW A and MGW B. See Figure 3. The connection method can refer to the TS 23205 protocol. After the connection is completed, the network form and the user switch from MGW A to MGW B is the same.

5. The MGC calls the GMSC through signaling, and controls the MGW A to establish a bearer from T4 to the GMSC.

Through the above steps, the data service of user B is transferred to the IWF resource device on MGW A for processing.

When the user switches from voice communication to data service, its specific implementation process is as follows (corresponding to the point curve process in Figure 2):

1. MGC first adds two endpoints T3 and T4 on MGW A, and allocates an IWF channel. Previously, the bearer from MGW B to GMSC has been established (established in the voice service stage).

2. MGC adds endpoints T3 and T4 on MGW B, and indicates that T3 and T1 are bidirectionally connected, and T4 and T2 are bidirectionally connected. The final connection relationship is modified as shown in Figure 4. There may be no adapter between T3 and T1 at 2G.

3. The MGC is connected to T3 of MGW A and T3 of MGW B, and is connected to T4 of MGW A and T4 of MGW B. In this way, the user's data can be processed on the IWF on MGW A, and the processed data will be transferred back to MGW B.

Of course, all data services can follow the point curve process shown in Figure 2.

Since the user handover in the mobile network is inevitable, the processing procedure is as follows when the user is handed over:

Assuming that the user switches from MGW B to MGW C, regardless of whether MGW C has its own IWF resource device, the IWF resource device of MGWA is still used, which is consistent with the protocol TS 29107.

After the user switches to MGW C, add T5 in MGWA, and connect T5 of MGW A to T2 of MGW C to complete the switch. The signal transmission schematic diagram is shown in Figure 5, and then delete T3 of MGWB to T3 of MGW A Connection, change the connection from the endpoint T5 of MGW A to the endpoint T2 of MGW C into a two-way connection. The formation diagram is shown in Figure 6.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (10)

1, a kind of method of share I WF resource apparatus comprises the following steps:

A) by media gateway controller MGC control media gateway MGW the user's data business is transferred to the MGW that disposes the IWF resource apparatus and goes up processing;

B) by after the processing of IWF resource apparatus, give the data service receiving equipment with data passes.

2, the method for share I WF resource apparatus as claimed in claim 1 is characterized in that: if show it is data when professional at call establishment stage, described step B) comprise the following steps:

B1) control gateway or the switch that the data after the processing of IWF resource apparatus is sent to GMSC of mobile gateway switching center or data service receiving equipment by MGC;

B2) give the data service receiving equipment by this GMSC, gateway or switch with data penetration transmission.

3, the method for share I WF resource apparatus as claimed in claim 1 is characterized in that: if show it is data when professional at call establishment stage, described step B) comprise the following steps:

B1) control the MGW that the data forwarding reuse family after the processing of IWF resource apparatus is inserted by MGC;

B2) by this MGW data are sent to GMSC or to gateway, the switch of data service receiving equipment;

B3) give the data service receiving equipment by this GMSC, gateway or switch with data passes.

4, the method for share I WF resource apparatus as claimed in claim 1 is characterized in that: if be speech business at call establishment stage, and when the user switches to data service in communication process, described step B) comprise the following steps:

B1) control the MGW that the data forwarding reuse family after the processing of IWF resource apparatus is inserted by MGC;

B2) by this MGW data are sent to GMSC or to gateway, the switch of data service receiving equipment;

B3) give the data service receiving equipment by this GMSC, gateway or switch with data passes.

5, the method for share I WF resource apparatus as claimed in claim 1 is characterized in that: when the user initiates data service calls, and described steps A) more comprise the steps:

A1) whether the IAD MGW B that judges the user disposes the IWF resource apparatus, if, then carry out data processing by the IWF resource apparatus of this gateway after, directly data penetration transmission is given to the gateway or the switch of data service receiving equipment; If not, then carry out the following step;

A2) MGC distributes an IWF passage at the gateway MGW A that disposes the IWF resource apparatus for this user;

A3) MGC couples together the end points on MGWA and the MGWB;

A4) MGC calls out GMSC by signaling or to the gateway or the switch of data service receiving equipment, and control MGW A is established to GMSC or to the gateway of data service receiving equipment or the carrying of switch.

6, the method for share I WF resource apparatus as claimed in claim 5 is characterized in that: comprise also that in 3G network MGC distributes the step of rate adaptor on the MGW B that the user inserts, be fitted to the speed of core net in order to the data with transmission.

7, the method for share I WF resource apparatus as claimed in claim 1 is characterized in that: when the user switches to data service by voice, and described steps A) more comprise the steps:

A1) whether the IAD MGW B that judges the user disposes the IWF resource apparatus, if, then carry out data processing by the IWF resource apparatus of this gateway after, directly data penetration transmission is given to the gateway of data service receiving equipment; If not, then carry out the following step;

A2) MGC is disposing increase by the first newly-increased end points and the second newly-increased end points on the gateway MGW A of IWF resource apparatus, and distributes an IWF passage;

A3) MGC increases by the first newly-increased end points and the second newly-increased end points on user's IAD MGW B, and indicated this first newly-increased end points and last two-way connection of first end points of MGW B, this second newly-increased end points and last two-way connection of second end points of MGW B, there was not connection between original first end points of MGW B and second end points;

A4) MGC makes the first newly-increased end points of MGW A be connected with the first newly-increased end points of MGW B, and the second newly-increased end points of MGWA is connected with the second newly-increased end points of MGW B;

Described step B) more comprises the steps:

B1) control the MGWB that the data forwarding reuse family after the processing of IWF resource apparatus is inserted by MGC;

B2) data after will being handled by this MGW B send to GMSC or to the gateway or the switch of data service receiving equipment;

B3) give the data service receiving equipment by this GMSC, gateway or switch with data passes.

8, the method for share I WF resource apparatus as claimed in claim 7, it is characterized in that: in 3G network, also include MGC distributes codec between first end points on the MGW B that the user inserts and the first newly-increased end points step, be fitted to the speed of core net in order to data transmission.

9, the method for share I WF resource apparatus as claimed in claim 7 is characterized in that: if the user switches to another gateway MGW C by MGW B, then further carry out following steps:

Increase by the 3rd newly-increased end points on MGW A, the MGW A last second newly-increased end points is unidirectional the connection with the 3rd newly-increased end points, and closure is from second newly-increased end points to the three newly-increased end points;

Increasing by first end points and second end points on MGW C, is unidirectional connection between two end points, and closure is to first end points from second end points;

Set up of the unidirectional connection of the 3rd newly-increased end points of MGW A to the new gateway MGW C first end points link;

The first newly-increased end points of deletion MGW B connects to the first newly-increased end points of MGWA;

Change the second newly-increased end points of MGW A into two-way connection to the connection between the first end points link of MGW C.

10, the method for share I WF resource apparatus as claimed in claim 9, it is characterized in that: in 3G network, also include MGC distributes codec between first end points on the MGW C that the user inserts and second end points step, be fitted to the speed of core net in order to data transmission.

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