WO2009086663A1

WO2009086663A1 - Method for media gateway obtaining calling information

Info

Publication number: WO2009086663A1
Application number: PCT/CN2007/003936
Authority: WO
Inventors: Hao Chen; Hongjun Sun
Original assignee: Zte Corporation
Priority date: 2007-12-29
Filing date: 2007-12-29
Publication date: 2009-07-16
Also published as: CN101796800B; CN101796800A

Abstract

A method for a media gateway obtaining calling information is provided, the media gateway and a media gateway controller make the media gateway obtain the calling information through the intercommunicating information. The method includes: defining the event that the media gateway requests the media gateway controller for the calling information, a lower level device requesting the media gateway in the outgoing side for the calling information, the media gateway in the outgoing side originating the event for requesting the calling information to the media gateway controller, the media gateway controller responding to the event for requestingthe calling information. Also an property of whether to need the calling number or not is provided, the media gateway controller sends the property of whether to need the calling number or not to the incoming side media gateway, the incoming side media gateway determines whether to request the forward device for the calling number.

Description

Method for obtaining caller information by media gateway

Technical field

The present invention relates to the processing of associated signaling, and more particularly to a method for implementing a media gateway to obtain calling information under an NGN (Next Generation Network) architecture.

Background technique

• The signalling mode of the associated channel signaling is a signal mode in which the signals of each channel are transmitted via the voice channel itself or through a signal channel corresponding to the voice channel. It is divided into line signals and register signals according to its signal content, and sometimes DC pulse signaling is required.

In the NGN (Next Generation Network) architecture, the associated signaling is sent and received by the MG (Media Gateway) device under the control of the MGC (Media Gateway Controller) through the H248 protocol.

At present, the following deficiencies are handled by the associated signaling (R2 or China's No. 1 channel signaling): 1. If the MG is out of the office, if there is no calling information (including the calling number and the calling subscriber category KA/calling service category KD) If the next-level gateway or end office wants the MG to call the information, the gateway or the end office will time out and the call will fail. This result is unreasonable because the MGC is likely to get the calling information, and the MG can obtain the calling information from the MGC to continue the call. This is more reasonable.

2. The MG does not have an indication of whether or not to call the information when entering the office. Therefore, it is only inappropriate for the MG to decide whether to call the information to the previous office. This is not appropriate. For example, if the former office does not have the calling information, then the MG can only decide the subsequent process: Is the called number reported to the MGC or the reporting timeout failed? There is no agreement in the prior art, which will cause some calls that can be connected to fail. For example, the MG's pre-office has no calling information. At this time, the calling information is not needed, and the MG decides to call the information. Since the pre-office has no calling information, the MG cannot obtain the calling information, and thus the MG cannot obtain the calling information. The MGC reports a timeout failure. In fact, if the MG reports the called number to the MGC under the control of the MGC, the call can continue. Summary of the invention

The technical problem to be solved by the present invention is to provide a method for the media gateway to obtain the calling information, which solves the problem that the processing of the calling information in the prior art is not reasonable enough, resulting in a call failure.

In order to solve the above technical problem, the present invention provides a method for a media gateway to obtain calling information. The media gateway and the media gateway controller enable the media gateway to obtain calling information through message interworking, which includes: defining a media gateway to the media gateway controller. An event requesting the calling information, after the call is initiated, the lower office requests the calling information from the outgoing media gateway, and the outgoing media gateway initiates the event requesting the calling information to the media gateway controller, the media gateway The controller responds to the event requesting the calling information.

Further, the above method may further have the following features: the calling information is a calling number and a calling user category, or a calling number and a calling service category.

Further, the foregoing method may further have the following feature: after receiving the request for the calling information event from the media gateway controller, the media gateway controller requests the calling side media gateway to call the calling information, and the calling side media The gateway reports the calling information to the media gateway controller, and the media gateway controller sends the calling information to the central office media gateway, and the outgoing media gateway sends the calling information to the lower-level office to complete the call.

Further, the foregoing method may further have the following feature: after receiving the request for the calling information event from the media gateway controller, the media gateway controller requests the calling side media gateway to call the calling information, if the calling side is The media gateway has no caller information, and the media gateway controller times out to release the call.

Further, the foregoing method may further have the following feature: an event that the media gateway requests the media gateway controller to request the calling information is defined in an existing definition packet or a newly defined packet in the H.248 protocol.

The invention also provides a method for the media gateway to obtain the calling information. The media gateway and the media gateway controller enable the media gateway to obtain the calling information through the message intercommunication, which specifically includes: defining whether the attribute of the calling number is to be selected, and after the call is initiated, The media gateway controller sends the attribute of the calling number to the inbound side media gateway; the ingress side media gateway determines whether to request the calling number from the preceding office according to whether the attribute of the calling number is to be determined.

Further, the foregoing method may further have the following feature: whether the calling number attribute is required If the calling number is required or the calling number must be the same, the incoming media gateway requests the calling number from the preceding office, and the preceding office sends the calling number to the incoming media gateway, and the incoming media gateway sends the mutual After the control signal A3 is sent to the media gateway controller, the calling party media gateway requests the calling service class KD. After the KD is obtained, the inbound media gateway reports the calling number and the KD to the media gateway controller.

Further, the foregoing method may further have the following feature: if the calling number attribute is required to require the calling number need, the ingress side media gateway requests the calling number from the preceding office, if the incoming media gateway fails to time out Receiving the calling number, the ingress side media gateway sends the non-inter-control signal A3 to the pre-office requesting the calling service class KD, and after the KD is obtained, the inbound-side media gateway reports the called number and the KD. Give the media gateway controller.

Further, the foregoing method may further have the following feature: if the calling number attribute is a mandatory calling number must, the inbound side media gateway requests the calling number from the preceding office, if the incoming media gateway fails to time out Obtaining the calling number, the ingress side media gateway is wrong to the media gateway controller.

Further, the foregoing method may further have the following feature: whether the calling number attribute is not the calling number not, and the media gateway continues the subsequent process according to the signal sent by the media gateway controller, if the media gateway controller gives the The incoming media gateway sends an A5 or A6 signal, and the ingress side media gateway requests the calling number from the preceding office, and then reports the calling number to the media gateway controller; if the incoming media gateway fails to time out Obtaining a calling number, the inbound side media gateway reporting the called number or an empty number to the media gateway controller.

Further, the foregoing method may further have the following feature: whether the calling number attribute is not the calling number not, the ingress side media gateway continues the subsequent process according to the signal sent by the media gateway controller, if the media gateway The controller sends an A3 signal to the ingress side media gateway, and the ingress side media gateway sends an A3 signal to the preceding station, requests KD, and after sending the KD, sends the cleared calling and called number and KD to the media gateway control. , complete the call.

Further, the foregoing method may further have the following feature: if the inbound side media gateway fails to obtain the KD, the ingress side media gateway reports an error to the media gateway controller.

Further, the above method may further have the following feature: whether the attribute of the calling number is to be defined in an existing definition package or a newly defined package in the H.248 protocol. Compared with the prior art, the present invention solves the problem that the call failure occurs without the caller information on the outgoing side of the associated call; and provides a flexible and reasonable solution for handling the caller information for the incoming call side of the associated call, so that the MG The device is better controlled by the MGC device, increasing the flexibility of the system design. BRIEF abstract

1 is a diagram of a next generation network architecture in the present invention;

2 is a flow chart of the MG actively calling the MGC to call the information in the present invention;

3 is a flow chart 1 of the present invention in which the incoming MG is controlled by the MGC device to process the calling information; FIG. 4 is a flow chart 2 of the present invention in which the incoming MG is controlled by the MGC device to process the calling information; FIG. 5 is the present invention. The incoming MG is controlled by the flow chart 3 of the MGC device processing the calling information. Preferred embodiment of the invention

In the present invention, the media gateway and the media gateway controller enable the media gateway to obtain the calling information through message intercommunication. The following technical solutions are adopted, and the extended H248 protocol package of the present invention includes:

1. Expand the event of the bcas package, add an event that the MG wants to call the MGC, such as defining an event casa, the value of 1 indicates that the outgoing MG wants the MGC to call the information;

2. Expand the bcas package event, add an attribute rqsi to the calling number;

The rqsi attribute has three values:

1) need, indicates the calling number, after the timeout, sends a non-mutual A3 signal to the end office to KD (calling service category), and after the KD is obtained, the called number and KD are reported to the MGC, and the KD error is not obtained after the timeout;

2) must, indicates that the calling number is to be obtained, and the calling number is not reported as an error;

3) not, indicating that the calling number is not required. The A signal sent after the incoming call is reported is controlled by the MGC. That is, it is also possible to send the A5/A6 calling number later. The main called party number is cleared to 0 and reported to the media gateway controller; or the A3 signal is sent to D, and K is reported after timeout.

Among them, not only the above attributes are added to the bcas package, but also existing ones. In the package (such as bcasaddr, icas, etc.); or a newly defined extension package.

The attributes casa and rqsi are not limited to being implemented by two independent attributes, or they may be combined into one attribute, and the above-mentioned casa and rqsi attributes are implemented by specifying different values for the attribute, such as the value of the attribute. 1st corresponds to the casa attribute, and other values (such as must, need, not) correspond to the rqsi attribute.

Embodiment 1: On the outgoing side, the MG actively requests the MGC to call the information;

As shown in FIG. 2, when the outgoing side PSTN (Public Switched Telephone Network) wants to call the information to the outgoing MG, and the MG does not have this information, the MG uses the MG defined by the present invention to call the MGC for the event of the calling information (such as an extension). The bcas attribute casa=l) to request the calling information from the MGC, thereby completing the call, specifically includes the following steps:

Step 101: On the calling side of the MGC, the MG reports the called number to the MGC;

Step 102, the MGC sends the called number to the office side MG;

Step 103: The outgoing MG sends the called number to the lower-level office through the associated signaling (ie, the outgoing side PSTN);

Step 104: After receiving the called number, the lower-level office requests the calling party MG to request the calling information. Step 105: The outgoing MG requests the calling information from the MGC through bcas/casa=l; Step 106, after receiving the call, the MGC The side MG requests the calling information;

Step 107: If the calling MG does not have the calling information, the MGC times out, and the call is released; otherwise, the calling side MG reports the calling information to the MGC;

Step 108. The MGC sends the calling information to the office side MG.

Step 109. The outgoing side MG sends the calling information to the lower-level office through the accompanying signaling to complete the call.

The MG is controlled by the MGC to process the calling information by the following steps: Step A. After the call is initiated, the ingress side MG reports the forward occupancy message to the MGC;

Step B: The MGC gives the entry side MG a number list with the rqsi attribute;

Step C: The ingress side MG requests the called number from the previous level office, and reports it to the MGC after the receipt; Subsequent processing varies according to the properties of rqsi, as follows:

When rqsi is '!' is born as need,

Step D, the ingress side MG sends the A5/A6 signal to the calling station to request the calling number. If the calling number can be obtained, go to step E, and the timeout does not get the calling number to enter step F;

Step E, the ingress side MG sends a mutual control signal to the front office A3 requests KD, and then sends the calling number and KD to the MGC, and the timeout does not get KD to report to the MGC;

Step F, the ingress side MG sends a non-inter-control signal to the front office A3 requests KD, and then sends the calling number and KD to the MGC, and the timeout does not get KD to report the error to the MGC. When the rqsi attribute is must,

Step D1, the ingress side MG sends an A5/A6 signal to the front office to request the calling number. If the calling number can be obtained, the process proceeds to step E1, and the timeout does not get the calling number to enter step F1;

Step E1, after the MG on the ingress side sends a mutual control signal to the preceding stage, A3 requests D, and after receiving the report, the calling number and the KD are reported to the MGC, and the timeout does not get the KD to report the error to the MGC;

Step F1; The incoming side MG reports an error to the MGC. When rqsi belongs to, ί" is not,

At this time, the MG sent to the SG to the front office is controlled by the MGC, and is processed according to the A3/A5/A6 signal sent by the MGC.

Among them, if you do not want the calling number, the MGC gives the MG an A3 signal. If the calling number is also required, the MGC sends the A5 (R2 Signaling) or A6 (China Signaling 1) signal to the MG.

Step D2: If the MGC requests the MG to send the A5 (R2 signaling) or A6 (China No. 1 signaling) signal to the calling party, the process proceeds to step E2. If the MGC sends the A3 signal to the MG to request the KD, the MG sends the message to the preceding station. The A3 signal is KD. After the KD is obtained, the called number and KD are reported to the MGC. If the KD is not obtained after the timeout, an error is reported to the MGC.

In step E2, the MG sends the A5 (R2 signaling) or A6 (China No. 1 signaling) to the calling party to the calling station, and then the calling number is reported to the MGC; if the MGC times out, the calling number is not obtained, only the Call the number to the MGC (or give the empty number to the MGC, because the previous MG has already been called The number is reported to MGC).

Further explanation will be given below by means of three embodiments.

In the second embodiment, the ingress side MG is controlled by the MGC device to process the calling information (whether the attribute rqsi of the calling number is required, and the flag is configured on the MGC)

As shown in Figure 3, when the MG requests the PSTN side to time out the calling number, it sends a non-mutual A3 signal request KD to the PSTN. (The non-inter-control signal is sent because the MG requests the mutual control number of the calling number. The response has not yet been received, that is, the process of mutual control has not ended yet. At this time, the MG cannot send another mutual control signal, the same below. After receiving the KD, the MG sends the called number and KD to the MGC to complete the connection. The KD timeout reports a timeout error to the MGC, which includes the following steps:

Step 304, the ingress side MG wants the calling number to be forwarded to the previous office;

• Step 305, the MG timeout does not get the calling number;

Step 306, the MGC sends a non-inter-control signal A3 to the MG, and the ingress side MG sends a mutual control signal A3 to the front office to request KD;

Step 307, the pre-office sends a KD to the MG;

Step 308, the MG reports the called number and the KD to the MGC.

In the foregoing step 305, if the calling office sends the calling number to the MG, in step 306, the ingress side MG sends the mutual control signal A3 to the front office to request KD. In the step 308, the MG will call the calling number and KD reported to the MGC.

In the above step 307, if the pre-office has not sent the KD to the MG, then in step 308, the MG reports an error to the MGC.

In the third embodiment, the incoming MG is controlled by the MGC device to process the calling information (whether the attribute rqsi of the calling number is must, this flag is configured on the MGC)

As shown in Figure 4, when the MG requests the PSTN side to time out, the MG reports a timeout error directly to the MGC, and the MGC releases the call this time.

Step 404: The ingress side MG requests the calling number from the preceding office. Step 405, the MG times out to obtain the calling number;

Step 406, the incoming side MG is wrong with MGC 4

In the above step 405, if the MG can obtain the calling number, the subsequent steps are the same as the steps 306-308 in the second embodiment, and the ingress side MG requests the KD to send the mutual control signal A3 to the preceding stage, and obtains the calling number and the KD. Reported to the MGC, the timeout did not get KD to report an error to the MGC.

Embodiment 4: The incoming MG is controlled by the MGC device to process the calling information (whether the attribute rqsi of the calling number is not, this flag is configured on the MGC).

As shown in Figure 5, after the MG sends the called number to the MGC, the MG subsequently sends out to the PSTN side what A signal is controlled by the MGC. If the MG requests the PSTN to time out from the PSTN, it sends a non-mutual A3 signal request KD to the PSTN. After receiving the KD, the MG sends the primary and called number and KD to the MGC after clearing the 0, and the connection is completed. If the timeout is not obtained. KD reported a timeout error to MGC.

Step 503: The pre-office sends the called number to the media gateway.

Step 504: The media gateway sends the called number to the media gateway controller.

Step 505: The media gateway controller sends the A5/A6 signal to the media gateway according to the service requirement. Step 506: The media gateway sends the A5/A6 signal to the pre-office according to the indication of the media gateway controller to request the calling information.

Step 507, if the caller information is obtained, the caller information is reported to the MGC, if the request caller information times out, go to step 508;

Step 508: The media gateway controller sends an A3 signal to the media gateway.

Step 509, the MG sends a non-inter-control signal A3 to the pre-office request KD;

Step 510, the front office returns KD to the MG;

Step 511: The MG reports the cleared calling number and KD to the MG.

In step 510, if the MG fails to obtain the KD, the MG reports an error to the MGC in step 511. Industrial applicability

Compared with the prior art, the present invention solves the problem that the call failure occurs without the caller information on the outgoing side of the associated call; and provides a flexible and reasonable solution for handling the caller information for the incoming call side of the associated call, so that the MG The device is better controlled by the MGC device, increasing the flexibility of the system design.

Claims

Claim

A method for obtaining a calling message by a media gateway, wherein the media gateway and the media gateway controller enable the media gateway to obtain the calling information through message intercommunication, which specifically includes: defining the media gateway to request the calling information from the media gateway controller. After the event is initiated, the lower office requests the calling information from the outgoing media gateway, and the outgoing media gateway initiates the event requesting the calling information to the media gateway controller, where the media gateway controller responds An event requesting caller information.

The method according to claim 1, wherein the calling information is a calling number and a calling user category, or a calling number and a calling service category.

The method of claim 1, wherein the media gateway controller requests the calling information from the media gateway controller after requesting the media gateway controller to request the calling information event, The calling side media gateway reports the calling information to the media gateway controller, and the media gateway controller sends the calling information to the central office media gateway, and the outgoing media gateway sends the calling information to the lower office to complete the call.

The method of claim 1 or 3, wherein the media gateway controller requests the caller from the originating media gateway after receiving the caller information event from the media gateway controller. Information, if the calling side media gateway does not have the calling information, the media gateway controller times out and releases the call.

5. The method of claim 1, wherein the event that the media gateway requests the media gateway controller for the calling information is defined in an existing defined packet or a newly defined packet in the H.248 protocol.

A method for obtaining a calling message by a media gateway, wherein the media gateway and the media gateway controller enable the media gateway to obtain the calling information through message intercommunication, which specifically includes: defining whether the attribute of the calling number is to be selected, and after the call is initiated. The media gateway controller sends the attribute of the calling number to the inbound side media gateway; and the inbound side media gateway determines whether to request the calling number from the preceding office according to whether the attribute of the calling number is to be determined.

The method according to claim 6, wherein the calling party number attribute needs to be a calling number or a calling number must, and the ingress side media gateway is forward. The office requests the calling number, and the pre-office sends the calling number to the inbound media gateway. The inbound-side media gateway sends the mutual control signal A3 to the pre-office to request the calling service category KD. After the KD is obtained, the office obtains the calling number. The incoming media gateway reports the calling number and the KD to the media gateway controller.

The method according to claim 6, wherein the calling party number attribute requires the calling number need, and the ingress side media gateway requests the calling number from the preceding office, if the incoming side The media gateway fails to receive the calling number, and the ingress side media gateway sends the non-inter-control signal A3 to the pre-office to request the calling service class KD. After the KD is obtained, the inbound media gateway will be called. The number and KD are reported to the media gateway controller.

The method according to claim 6 or 7, wherein the calling party number attribute is a mandatory calling number must, and the ingress side media gateway requests the calling number from the preceding office, if The incoming media gateway fails to obtain the calling number, and the incoming media gateway reports an error to the media gateway controller.

The method according to claim 6, wherein, if the calling number attribute is not the calling number not, the ingress side media gateway continues the subsequent process according to the signal sent by the media gateway controller, if The media gateway controller sends an A5 or A6 signal to the inbound-side media gateway, and the inbound-side media gateway requests the calling number from the preceding office, and reports the calling number to the media gateway controller; The incoming media gateway fails to obtain the calling number, and the incoming media gateway reports the called number or the empty number to the media gateway controller.

The method according to claim 6 or 7, wherein the calling party number attribute is not the calling number not, and the ingress side media gateway continues the subsequent process according to the signal sent by the media gateway controller. If the media gateway controller sends an A3 signal to the ingress side media gateway, the ingress side media gateway sends an A3 signal to the preceding station, requests the KD, and sends the KD to the primary called number and the KD after being cleared. To the media gateway controller, complete the call.

The method according to claim 7 or 8 or 11, wherein if the incoming media gateway fails to obtain the D, the ingress side media gateway reports an error to the media gateway controller.

13. The method according to claim 6, wherein the attribute of the calling number is defined in an existing definition package or a newly defined package in the H.248 protocol.