WO2011038634A1

WO2011038634A1 - Method and device for processing call in ip multimedia subsystem network

Info

Publication number: WO2011038634A1
Application number: PCT/CN2010/076804
Authority: WO
Inventors: 罗伯强; 杨翠婷; 简海燕
Original assignee: 华为技术有限公司
Priority date: 2009-09-30
Filing date: 2010-09-10
Publication date: 2011-04-07
Also published as: CN101695073A; CN101695073B

Abstract

The embodiments of the present invention disclose a method and device for processing a call in an IP Multimedia Subsystem (IMS) network, wherein the method includes that a gateway network element device receives a call message carrying indication information (101), said call is determined whether it is a calling anchor call or not according to said indication information, if said call is a calling anchor call, an IMS domain calling anchor identifier is added into said call message, and the call message containing said IMS domain calling anchor identifier is sent to trigger a calling flow (103). In the embodiments of the present invention it is the gateway network element device that determines whether the call is a calling anchor call or not, and if it is a calling anchor call, an IMS domain calling anchor identifier is added into the call message, and the call message containing said IMS domain calling anchor identifier is sent to trigger a calling flow, thus avoiding additional arrangement of an anchor application server (AS), saving the cost and simplifying the call flow.

Description

IMS network call processing method and device

The present invention relates to the field of communications, and in particular, to an IMS network call processing method and device.

Say

Background technique

In the IP Multimedia Subsystem (IMS) network, various Application Servers (ASs) provide users with a variety of services. In the circuit

In a (Circuit Switch, CS) domain network, a method of superimposing an IMS network on a CS domain network is widely used to implement value-added services. Since the IMS network is superimposed on the CS domain network to provide services, it is necessary to take some measures in the CS domain network to route the originating or terminating calls to the IMS network for service control. The above method is generally called an anchoring process. In the existing anchoring process, the public service identity (PSI) address mode is first triggered to the anchoring AS (anchoring AS), after the anchoring AS is identified by the calling process, and then the AS is the calling user. The identity initiates a call to the Call Session Control Function (CSCF) for IMS service triggering. The inventors have found that at least the following problems exist in the existing anchoring process: A server similar to the anchoring AS is required to identify the calling process and initiate a new call. Therefore, an additional AS needs to be deployed, which increases the networking cost and complicates the call process. Summary of the invention In one aspect, an embodiment of the present invention provides an IMS network call processing method, including: a gateway network element device receiving a call message carrying indication information; determining, according to the indication information, whether the call is a calling anchor call; The call is a caller anchoring call, and the IMS domain caller anchor identifier is added to the call message, and a call message including the IMS domain caller anchor identifier is sent for the calling process trigger. In another aspect, the embodiment of the present invention provides a gateway network element device, including: a receiving unit, configured to receive a call message carrying indication information; and a determining unit, configured to determine, according to the indication information, whether the call is a calling anchor a processing unit, configured to: when the determining unit determines that the call is a calling anchor call, add an IMS domain calling anchor identifier to the call message, and send the calling anchor identifier of the IMS domain The call message is triggered by the calling process. The IMS network call processing method and device provided by the embodiment of the present invention determine whether the caller is anchored by the gateway network element device, and if the caller is anchored, add the IMS domain anchor anchor identifier to the call message, and send The call message including the calling anchor identifier of the IMS domain is triggered by the calling process; thus, the anchor AS is not additionally arranged, which saves cost and simplifies the call flow. DRAWINGS

1 is a schematic diagram of an IMS network call processing method according to an embodiment of the present invention; FIG. 1 is a schematic diagram of an IMS network call processing method according to Embodiment 2 of the present invention; FIG. 3 is a schematic diagram of an IMS network call processing method according to Embodiment 3 of the present invention; 4 is a structural block diagram of a gateway network element device according to an embodiment of the present invention;

FIG. 5 is a structural block diagram of a gateway network element device according to Embodiment 2 of the present invention. detailed description

The IMS network call processing method and device according to the embodiment of the present invention are described in detail below with reference to the accompanying drawings.

A first embodiment of the present invention provides an IMS network call processing method. As shown in FIG. 1, the method includes: a gateway network element device receiving a call message carrying indication information;

Determining, according to the indication information, whether the call is a calling anchor call;

If the call is a calling anchor call, an IMS domain caller anchor is added to the call message, and a call message containing the ms domain caller anchor identity is sent for the caller process trigger.

In a specific implementation, the gateway network element device may include an inquiry-call session control function entity

(Interrogat ing-Ca ll Ses s ion Contro l Funct ion, I-CSCF ) or Media Gateway Control Function Entity (MGCF) or Interconnect Ion Control Function (IBCF) .

The IMS domain calling anchor identifier may be included in the Route header field of the call message, and may be implemented by adding a 0 r i g parameter in the Rou t e header field. Of course, it can be implemented by extending the message body or other parameters, or by other means, which is not limited by the embodiment of the present invention.

Before sending the call message of the ms domain caller anchor identifier of the ms domain to be triggered by the calling process, the method may include: Delete the above instructions.

If the gateway network element device is an I-CSCF, and the call message carrying the indication information is a Session Initiated Protocol (SIP) message, a call message including the IMS domain caller anchor identifier is sent for calling. Process triggers include:

Querying the home subscriber server (HSS) according to the calling number carried in the call message, and obtaining a service-call session control function (S-CSCF) serving the call service the address of;

A call message containing the IMS domain calling anchor identity is sent to the S-CSCF for a calling process trigger.

If the gateway network element device is an MGCF or an IBCF, the call message carrying the indication information is an Initial Address Message (IMM) message, and the call message including the IMS domain calling anchor identifier is sent for the primary message. Calling process triggers includes:

Obtaining an address of the I-CSCF serving the call according to the configuration message;

A call message containing the IMS domain calling anchor identity is sent to the I-CSCF for a calling process trigger.

If the MGCF or the IBCF receives the call message carrying the indication information as an IAM message, sending the call message including the IMS domain calling anchor identifier to perform the calling process triggering further includes converting the I AM message into a SIP message.

In the embodiment of the present invention, it may be determined by the gateway network element device whether it is a calling anchor call, if it is the primary Calling the anchor call, adding the IMS domain caller anchor identifier to the call message, sending a call message containing the anchor anchor identifier of the IMS domain to trigger the calling process; thereby saving the cost without additionally arranging the anchor AS , streamlining the call process.

A second embodiment of the present invention provides an IMS network call processing method, where the gateway network element device is an MGCF as an example. As shown in Figure 2, it includes:

201. The terminal A initiates a call to the terminal B through the communication network, and the call is routed to the soft handover process.

The terminal A is a traditional user terminal, and an IMS anchor anchor service is signed on the Home Home Location Register (HLR), and the AS of the IMS needs to be triggered in the calling process. Terminal B may be a CS domain user or an IMS domain user.

202. The softswitch triggers the intelligent service to the service control point (Servi ce Contro l Point, SCP). Specifically, the softswitch first queries the HLR, and the HLR returns the subscription information of the calling user A signing the anchoring service in the response message. The signing of the anchoring service is considered to require the triggering of the intelligent service, and then the soft handover triggers the intelligent service to the SCP.

Of course, it is also possible to soft-query the HLR and then anchor it to the IMS, so there is no need to trigger the SCP.

203. The SCP indicates that the softswitch needs to perform anchoring to the IMS.

Specifically, the SCP determines that the calling process is to be anchored to the IMS, and then assigns an IMS Routing Number (IMSR) to the call. The IMRN is a number that belongs to the IMS network number segment and is used to indicate that the softswitch is routed to the IMS. 204. The softswitch carries the indication information and is routed to the MGCF.

Specifically, the softswitch determines to be routed to the IMS according to the IMRN, and adds indication information to indicate the anchor anchor. For example, by inserting a specific prefix as the indication information before the called number, the anchor is anchored. , route the IAM message to the MGCF.

205. The MGCF identifies the calling anchor process, converts the IAM message into a SIP message, and routes it to the I-CSCF.

Specifically, after receiving the I AM message carrying the indication information, the MGCF determines, according to the indication information, whether the call is a calling anchor call; if the call is a calling anchor call, adding an IMS domain calling anchor And identifying, in the call message, sending a call message that includes the IMS domain calling anchor identifier to perform a calling process trigger.

Specifically, the MGCF may add an or ig parameter in the Route header field to carry the anchor anchor identifier, for example: Route: <scs cf. home, com; orig>, and then in the Route header field of the call message. A call message containing the IMS domain calling anchor identity is sent for the calling process trigger.

The embodiment of the present invention is not limited thereto.

Further, the address of the I-CSCF serving the calling user may be obtained according to the configuration information, and then the call message including the calling anchor identifier of the IMS domain is sent to the I-CSCF for triggering of the calling process.

The MGCF may delete the indication added by the softswitch before routing to the I-CSCF. If at the step The 204 softswitch can restore the real called number by inserting a specific prefix as the indication information in front of the called number and deleting the indication information.

206. The I-CSCF performs caller process processing.

The I-CSCF determines the calling process according to the or i g of the Rou t e header field.

In the embodiment of the present invention, the MGCF may determine whether it is a calling anchor call, and if it is a calling anchor call, add an IMS domain calling anchor identifier to the call message, and send the calling anchor identifier of the IMS domain. The call message is triggered by the calling process; thus, the anchor AS is not additionally arranged, which saves cost and simplifies the call flow.

The method of the gateway network element device being the IBCF is similar to that of the second embodiment, and details are not described herein again.

Embodiment 3 of the present invention provides an IMS network call processing method, where the gateway network element device is

The I-CSCF is an example. As shown in Figure 3, it includes:

301. Terminal A initiates a call to terminal B through a communication network, and the call is routed to soft handover processing.

The terminal A is a traditional user terminal, and the IMS anchor anchor service is signed on the user home location register HLR, and the AS of the IMS needs to be triggered in the calling process. Terminal B may be a CS domain user or an IMS domain user.

302. The softswitch triggers the intelligent service to the SCP.

Specifically, the softswitch first queries the HLR, and the HLR returns, in the response information, the subscription information of the calling user A to sign the calling anchor service. Signing the caller anchoring the service is considered to need to trigger the smart service, then soft handing Change the trigger smart service to the SCP.

303. The SCP indicates that the softswitch needs to perform anchoring to the IMS.

Specifically, the SCP determines that the calling process is to be anchored to the IMS, and then assigns an IMRN to the call. The IMRN is a number belonging to the IMS network number segment and is used to indicate that the softswitch is routed to the IMS.

304. The softswitch converts the IAM message into a SIP message, and carries the indication information to the IMS. Specifically, the softswitch determines to be routed to the IMS according to the IMRN, and supports interworking with the IMS by using the SIP protocol, and then performs protocol conversion, and converts the I cliff message into a SIP message, such as a SIP INVITE message, where the Route header field is filled in by the I-CSCF. The address, the called number is filled in the original called number, and the indication information is added to indicate the anchoring of the calling party. For example, the specific prefix can be inserted before the called number as the indication information to indicate the anchoring of the calling party.

In the networking of this embodiment, a separate MGCF is not arranged, and the function of the MGCF is implemented by the softswitch to complete protocol conversion and message delivery.

305. The I-CSCF identifies the calling anchoring process and routes to the S-CSCF.

Specifically, after receiving the SIP message carrying the indication information, the I-CSCF determines, according to the indication information, whether the call is a calling anchor call; if the call is a calling anchor call, adding an IMS domain calling anchor Determining in the call message, sending a call message including the IMS domain calling anchor identity to perform a calling process trigger.

Specifically, the I-CSCF may be in the Route header field of the call message, specifically in the Route header. Add the or ig parameter in the domain to carry the calling anchor identity, for example: Route: <scs cf. home, com; orig> , and then send a call message containing the IMS domain calling anchor identity for the calling process trigger.

The embodiment of the present invention is not limited thereto.

Further, the Home Subscr iber Server (HSS) may be queried according to the calling number, and the service-call session control function entity (Service-Cal l Ses s Control Control Function, S) is obtained for the calling user. The address of -CSCF ), and then send a call message containing the IMS domain calling anchor identity to the S-CSCF for the calling process trigger.

The I-CSCF may delete the indication added by the softswitch before routing to the S-CSCF. If, in step 304, the softswitch is to insert a specific prefix as the indication information before the called number, the indication information is deleted, and the real called number can be restored.

306. The S-CSCF performs a calling process, and the AS triggers.

In the embodiment of the present invention, it may be determined by the I-CSCF whether it is a calling anchor call, such as a caller anchor call, an IMS domain call anchor identifier is added in the call message, and the IMS domain call anchor is sent. The identified call message is triggered by the calling process; thus, the anchor AS is not additionally arranged, which saves cost and simplifies the call flow.

As shown in FIG. 4, the present invention further provides a gateway network element device, including:

The receiving unit 401 is configured to receive a call message carrying the indication information.

The determining unit 402 is configured to determine, according to the indication information, whether the call is a calling anchor Call

The processing unit 403 is configured to: when the determining unit determines that the call is a calling anchor call, add an IMS domain calling anchor identifier to the call message, and send a call message that includes the IMS domain calling anchor identifier. To trigger the calling process.

The processing unit 403 adds the IMS domain call anchor identifier to the Route header field of the call message, which can be implemented by adding an or ig parameter in the Route header field. Of course, it can be implemented by extending the message body or other parameters, or by other means, which is not limited by the embodiment of the present invention. .

In a specific application, the gateway network element device may specifically include an Inter-Calling Session Control Function Entity (I-CSCF) or a Media Gateway Control Function (Media Gateway Control Funct i on). , MGCF) or Interconnecting Border Control Functine (IBCF).

The processing unit 403 further includes an obtaining sub-unit 4031, 4, if the device is an I-CSCF, the obtaining sub-unit 4031 is configured to query the HSS according to the calling number carried in the call message to obtain the S-serving for the call service. The address of the CSCF; sending a call message containing the IMS domain calling anchor identity to the S-CSCF for the calling process trigger.

If the device is an MGCF or an IBCF, the obtaining subunit 4031 is configured to acquire an address of an I-CSCF serving the call according to a configuration message, and send a call message including the IMS domain calling anchor identifier to the device. The I-CSCF is used to trigger the calling process. If the device is an MGCF or an IBCF, the processing unit 403 further includes a protocol conversion sub-unit 4032, configured to convert the IAM message carrying the indication information received by the receiving sheep element 401 into a SIP message.

As shown in FIG. 5, the embodiment of the present invention further provides another gateway network element device, and further includes a deleting unit 404, configured to delete the indication information received by the receiving unit.

The gateway network element device provided by the embodiment of the present invention, as shown in FIG. 4 or FIG. 5, is configured to add an IMS domain calling anchor identifier to a call message if the caller is anchored, and send the IMS domain master. The call message called the anchor ID is triggered by the calling process; thus, the anchor AS is not additionally arranged, which saves cost and simplifies the call flow.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Claim

An IP multimedia subsystem IMS network call processing method, comprising: a gateway network element device receiving a call message carrying indication information;

If the call is a calling anchor call, an IMS domain call anchor identifier is added to the call message, and a call message containing the IMS domain call anchor identifier is sent for the calling process trigger.

The method according to claim 1, wherein the IMS domain calling anchor identifier is included in a Route header field of the call message, specifically by adding an or ig parameter in a Route header field.

The method according to claim 1, wherein before the sending the call message including the IMS domain calling anchor identifier to trigger the calling process, the method further includes:

Delete the indication information.

The method according to any one of claims 1 to 3, wherein, if the gateway network element device comprises a challenge-call session control function entity I-CSCF, receiving a call message carrying the indication information is receiving a session initiation protocol SIP And the sending, by the sending, the call message that includes the s domain caller anchor identifier to perform the calling process triggering includes:

Querying the home subscriber server based on the calling number carried in the call message, the HSS obtains the address of the service-call session control function entity S-CSCF serving the call;

Sending a call message containing the IMS domain calling anchor identity to the S-CSCF for caller process triggering.

The method according to claim 4, wherein before the gateway network element device receives the call message carrying the indication information, the method includes:

The softswitch determines to route to the IMS network according to the IMS routing number IMRN, performs protocol conversion, converts the initialization address IAM message into a SIP message, and adds indication information to indicate the calling anchor, and then routes the SIP message to The I-CSCF.

The method according to any one of claims 1 to 3, wherein, if the gateway network element device comprises a media gateway control function entity MGCF or an interconnection boundary control function IBCF, receiving a call message carrying the indication information is receiving an initialization address. a cliff message, the sending a call message including the IMS domain calling anchor identifier to perform a calling process trigger includes:

The method according to claim 6, wherein before the sending the call message including the IMS domain calling anchor identifier to trigger the calling process, the method further comprises: converting the IAM message into a SIP message.

The method according to claim 6, wherein before the gateway network element device receives the call message carrying the indication information, the method includes:

The softswitch determines to route to the IMS network based on the IMS routing number IMRN, then adds indication information to indicate the anchor anchor, routing the IAM message to the MGCF or IBCF.

9. Method according to claim 5 or 8, characterized in that the softswitch is to indicate the calling anchor by inserting a specific prefix before the called number as the indication information.

10. A gateway network element device, comprising:

a receiving unit, configured to receive a call message carrying the indication information;

a determining unit, configured to determine, according to the indication information, whether the call is a calling anchor call, and a processing unit, configured to add an IMS domain calling anchor identifier when the determining unit determines that the call is a calling anchor call In the call message, a call message including the IMS domain calling anchor identifier is sent to perform a calling process trigger.

11. The device according to claim 10, wherein the gateway network element device comprises a challenge-call session control function entity I-CSCF or a media gateway control function entity MGCF or an interconnection boundary control function I BCF.

The device according to claim 11, wherein the processing unit further comprises an acquiring subunit, and if the device is an interrogation-call session control function entity I-CSCF, the obtaining subunit is configured according to The calling number carried by the call message queries the home subscriber server HSS to obtain the address of the service-call session control function entity S-CSCF serving the call; and sends a call message containing the IMS domain calling anchor identity to the S -CSCF to trigger the calling process.

The device according to claim 11, wherein the processing unit further comprises an acquisition subunit, and if the device is a media gateway control function entity MGCF or an interconnection boundary control function IBCF, the acquiring subunit is used. Obtaining the I-CSCF serving the call according to the configuration message Address: sending a call message containing the IMS domain calling anchor identity to the I-CSCF for caller process triggering.

The device according to claim 10 or 13, wherein the processing unit further comprises a protocol conversion subunit, configured to convert the IAM message carrying the indication information received by the receiving unit into a SIP message.

The device according to any one of claims 10 to 13, further comprising a deleting unit, configured to delete the indication information received by the receiving unit.