WO2007025435A1

WO2007025435A1 - A method and device for continuing the call between the networks

Info

Publication number: WO2007025435A1
Application number: PCT/CN2006/001681
Authority: WO
Inventors: Wenyu Liu
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2005-09-01
Filing date: 2006-07-14
Publication date: 2007-03-08
Also published as: CN1889542B; CN1889542A

Abstract

A method and device for continuing the call between the networks can expediently avoid the loss of called information when calling across the network. In the method of present invention, if the called identifications of the two networks don’t have monogamy, the gateway device packs the called identification in the first network into the related signaling of the second network. In order to store the called identification of the first network, it is possible to add the cell or extend the original cell or reuse the original cell in the related signaling of the second network.

Description

Inter-network call connection method and device

Technical field

The present invention relates to communication technologies, and in particular, to a call connection method and device across a network.

BACKGROUND OF THE INVENTION With the rapid advancement of communication technologies, people have higher and higher expectations and requirements for communication, and the third generation (3rd Generation, "3G") mobile communication system has high bandwidth, multi-service, high quality and the like. Big attracts the consumer market. In the 3G network architecture, mobile networks are no longer limited to circuit switching. Various networks such as packet domains and the Internet Protocol ("IP") multimedia subsystem have emerged. Both the circuit domain and the packet domain have their own functions and features. The circuit domain is mainly used to provide a connection for a circuit type service to a user, and the packet domain is used to provide a connection of a packet type service to a user. To achieve interworking between different types of networks, it is necessary to have a network-off device with cross-network call connection capability, such as a relay gateway with Media Gateway Control Function (MGCF), with access gateway control function. Access gateway (Access Gateway Control Function, cartridge "AGCF"), etc. User IDs are encoded differently between different types of networks. For example, in the circuit domain, the user ID is "1133889"; in the grouping domain, the user ID is "168 @ server.telecom.com". The correspondence between the circuit domain and the user identifier in the packet domain is stored in the user identifier comparison query device. Specifically, the user identifier stores the user or network identity control relationship of the two or more network domains against the query device, accepts the query request, and returns the result. The commonly used user identification comparison query device includes an ENUM (Electronic Numbering) server (referred to as "E UM server"), a domain name service system (Domain Name System, a "DNS") server, and the like. The ENUM server combines the most widely used telephone numbers in the world's communications with Internet domain name addresses and email addresses, making it easier for people to conduct various telecommunications communications. Flexible server. The method of combining is to combine the telephone number number standard established by the International Telecommunications Union ("ITU") with the domain name address rule used on the Internet, store the telephone number with DNS, and further use a telephone number in the domain name. The way to find available services in the system, the phone number is combined with the domain name and email address, and the user can perform various communications with only one phone number. Currently, when a call is established between different networks, the called subscriber identity in the call needs to be converted. For example, when a gateway device with a cross-network call connection capability receives a call from a circuit domain, the called user identifier in the circuit domain is used to query the user identifier against the query device to query its corresponding packet domain user identifier, the user identifier. The query result device returns the query result to the gateway device, and the gateway device initiates a call to the packet domain. For example, the gateway device receives a call in the circuit domain, and the called user identifier of the call is "1680110", and the gateway device queries the user identifier against the query device to query the user identifier in the corresponding packet domain. If the user ID in its corresponding packet domain is "168 @ server.telecom.com", then the query device returns "168 @ server.telecom.com" to the gateway device, which then uses "168 @ server .telecom.com" initiates a packet domain call as the called subscriber identity of the call. The process is shown in Figure 1. In step 101, the circuit domain sends call signaling to the gateway device MGCF having cross-network call connection capability for cross-domain connection, where the signaling carries the called subscriber identity "1680110"; in step 102, the circuit domain is The user identifier is called an index, and the user identifier is queried against the query device. In step 103, the user identifier returns a response message after completing the query, and the message includes the query result, that is, the user identifier of the corresponding group domain "168@ Server.telecom.com"; In step 104, the MGCF performs the connection with the result of the query as the called subscriber identity of the call signaling in the packet domain. It can be understood by those skilled in the art that, according to the above processing method, after the gateway device converts the user identifier, the call signaling initiated to the packet domain only includes the packet domain. User ID. However, in the user identification comparison query device, the user identifiers in the circuit domain and the packet domain are sometimes one-to-many, that is, the user identifiers in different circuit domains may correspond to the same user identifier in the packet domain. Therefore, the method of using only the user identifier in the packet domain to call the user identifier may result in the loss of the called information. On the other hand, if a user identity in the packet domain corresponding to the user identity in each circuit domain is set, the network needs to add more management functions accordingly, thereby increasing the network load.

SUMMARY OF THE INVENTION The present invention provides an inter-network call connection method and device, which makes it easier to avoid loss of called information when calling across a network. According to an aspect of the present invention, an inter-network call connection method is provided, including the following steps: when a gateway device connects an inter-network call signaling of a first network to a second network, setting a representative in call signaling of a second network Information identified by the called party in the first network. The method further includes determining whether the called identifier in the first network and the called identifier in the second network are operatively-corresponding, if not, setting the called identifier in the first network in the call signaling of the second network. Information. In the method, when the related call signaling of the second network is processed, the initial call object of the calling user is determined by combining the called identifier and the foregoing information in the signaling. Further in the method, the information is set in a new cell in the call signalling. Further in the method, the information is set in the original cell that is expanded in the call signaling. Further in the method, the information is set in the original cell reused in the call signalling. Further in the method, when the call signaling is session initiation protocol signaling, the reused cell may be a "To" header field. Further in the method, when the call signaling is session initiation protocol signaling, the reused cell may be a "P-Called-Party-ID" header field. Further in the method, when the call signaling is an integrated service digital network user part signaling, the reused cell is a "UUI" cell. In addition, in the method, the call signaling may be a session initiation protocol or an integrated service digital network user part protocol. In addition, in the method, the first network is a packet domain network, and the second network is a circuit domain network; or

The first network is a circuit domain network, and the second network is a packet domain network.

According to another aspect of the present invention, an inter-network call connection device is provided for connecting cross-network call signaling of a first network to a second network;

The called identifier information setting unit in the first network is configured to set, in the call signaling sent to the second network, information representing the called identifier in the first network.

The called identification information setting unit in the first network sets the information in a "UUI" cell of the integrated service digital network user part signaling.

The called identifier information setting unit in the first network sets the information in a "To" header field or a "P-Called-Party-ID" header field of the session initiation protocol signaling. The connection device is a media gateway control function entity. By comparison, it can be found that the main difference between the technical solution of the present invention and the prior art is that if the called identifiers in the two networks cannot be in one-to-one correspondence, the gateway device performs the call signaling connection of the first network to the second network. The called identity in the first network is packaged in the relevant signaling of the second network. In order to store the called identifier in the first network, a new cell may be added to the related signaling of the second network, or the original cell may be extended, or the original cell may be reused.

The difference in the technical solution brings about a more obvious beneficial effect, that is, because the called identifier in the first network is retained in the cell of the second network related signaling, the original called information is retained. This makes it possible to determine the initial call object of the calling user in subsequent processing. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic flow chart of a method for inter-network call connection in the prior art; FIG. 2 is a schematic flowchart of a method for inter-network call connection according to the principles of the present invention; FIG. 3 is a network according to a first embodiment of the present invention; FIG. 4 is a schematic flow chart of a method for inter-network call connection according to a second embodiment of the present invention; FIG.

Figure 5 is a flow chart showing an inter-network call connection method in accordance with a third embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the present invention will be further described in detail with reference to the accompanying drawings. In general, the core of the present invention can be embodied by FIG. As shown in FIG. 2, first, in step 201, the first network sends call signaling to the gateway device MGCF to perform cross-domain connection, where the call signaling carries the called identifier "1680110" of the first network. If the called identifier in the first network cannot correspond to the called identifier in the second network, step 202 is performed, and the MGCF indexes the called identifier of the first network to a user identifier such as an ENUM server. The query device (hereinafter referred to as "ENUM server" as an example) queries the corresponding called identifier of the second network; after completing the query, in step 203, the ENUM server returns a response message to the MGCF, and the response message includes the query result. 168 @server.telecom . com" , the corresponding called identity of the second network. Next, in step 204, the MGCF performs the connection as the called identifier in the second network call signaling, and the first cell of the second network call signaling is also provided with the first network call signaling. The original called ID "1680110". Therefore, when processing the call signaling of the second network, the initial identity of the calling user may be determined by combining the called identifier "168@server.telecom.com" in the signaling with the information "1680110" in the first cell. Calling the object, so that the initial call object of the calling user can be determined in subsequent processing, avoiding cross The problem of lost call information during network call. In an embodiment of the present invention, in order to package the called identifier "1680110" in the first network in the call signaling of the second network, a new cell is added to the call signaling of the second network, or the original letter is extended. Yuan, or reuse the original cell. An inter-network call connection method according to a first embodiment of the present invention is shown in FIG.

The IMS domain network and the circuit domain network are taken as an example to illustrate a scheme for saving a called identity in a circuit domain network by adding a cell to the call signaling of the IMS domain network in accordance with the principles of the present invention. As shown in FIG. 3, first, in step 301, the circuit domain network sends call signaling to the MGCF, that is, an Initial Address Message ("IAM"), for cross-domain connection. The called identifier "1680110" of the circuit domain network is carried in the call signaling. In this embodiment, the called identifier of the circuit domain network and the called identifier of the IMS domain network cannot be corresponding. Therefore, in step 302, the MGCF indexes the called identifier "1680110" of the circuit domain network, and queries the ENUM server for its corresponding The called identifier of the IMS domain network; after the query is completed, in step 303, the ENUM server returns a response message to the MGCF, where the response message includes the query result "168@server.telecom.com", that is, the corresponding IMS domain network. Call the logo. Thereafter, in step 304, the MGCF performs the query result "168@server.telecom.com" as the called identifier in the IMS domain network call signaling, and the circuit domain network call is also set in the IMS domain network call signaling. The original called identity of the signalling is "1680110". Specifically, in this step, the REQUESTURI in the "INVITE" message fills in the result "168@server.telecom.com" returned by the ENUM server, and a cell "OTHERDOMAINNUMBER" header field is added to the signaling. The called service identifier "1680110" of the circuit domain network is filled in. After the subsequent service server receives the call, the service type can be determined according to the original called identity. It should be noted that one of ordinary skill in the art can understand that the so-called addition, that is, the addition of a new cell, the name and semantics of the cell are different from other existing cells in the signaling. Thereafter, when processing the call signaling of the IMS domain network, the called identifier in the IMS domain call signaling in the signaling may be combined, and the newly added "OTHERDOMAINNUMBER" Information, determining the initial call object of the calling user. In this case, since the original called information is retained in the call signaling of the IMS domain network, it is possible to determine the initial calling object of the calling party in the subsequent processing. The inter-network call connection method according to the second embodiment of the present invention is as shown in FIG. 4, which illustrates an IMS domain network and a circuit domain network as an example, illustrating that the call signaling is a session initiation protocol according to the principles of the present invention. (Session Initation Protocol, referred to as "SIP"), the scheme of the called identity in the first network is saved by reusing the original "P-Called-Party-ID" header field in the call signaling. As shown in FIG. 4, first, in step 401, the circuit domain network sends call signaling, ie, an origination address message (IAM), to the MGCF for cross-domain connection. The called identifier "1680110" of the circuit domain network is carried in the call signaling. In this embodiment, the called identifier of the circuit domain network and the called identifier of the IMS domain network cannot be corresponding. Therefore, in step 402, the MGCF indexes the called identifier "1680110" of the circuit domain network, and queries the ENUM server for its corresponding After the query is completed, in step 403, the ENU server returns a response message to the MGCF, where the response message includes the query result "168 @server.telecom.com", that is, the corresponding IMS domain network. Call the logo. Thereafter, in step 404, the MGCF performs the query result "168@server.telecom.com" as the called identifier in the IMS domain network call signaling, and the circuit domain network call is also set in the IMS domain network call signaling. The original called identity of the signalling is "1680110". Specifically, in this step, the REQUESTURI in the "INVITE" message fills in the result "168@server.telecom.com" returned by the ENUM server, and in the "P-Called-Party-ID" header field of the message. Fill in the called ID "1680110" of the circuit domain network. Thereafter, when processing the call signaling of the IMS domain network, the called identifier "168@server.telecom.com" and the "P-Called-Party-ID" header in the IMS domain call signaling in the signaling may be combined. The information "1680110" in the domain determines the initial call object of the calling user. In this case, since the original called information is retained in the call signaling of the IMS domain network, it is possible to determine the initial calling object of the calling party in the subsequent processing. It should be noted that, when the call signaling is the session initiation protocol signaling, the embodiment saves the circuit domain network by reusing the original "P-Called-Party-ID" header field in the call signaling. The identifier is called, but the present invention is not limited thereto. In other embodiments, the called identifier of the circuit domain network may also be saved by reusing the original "To" header field in the call signaling. One of ordinary skill in the art will appreciate that so-called reuse, i.e., using the original cells in the signaling, remains semantically unchanged and is used in new fields or scenarios. The inter-network call connection method according to the third embodiment of the present invention is as shown in FIG. 5. The figure shows an IMS domain network and a circuit domain network as an example, illustrating that the call signaling is an integrated service number according to the principle of the present invention. When the ISDN User Part (ISUP) is used, the scheme of the called identifier in the first network is saved by reusing the original "UUI" cell in the call signaling. As shown in FIG. 5, first, in step 501, the IMS domain network sends a call signaling, that is, an "INVITE" message to the MGCF, for cross-domain connection. The circuit is carried in the call signaling, and the called identifier of the domain network is "Myaddr@huawei.com". In this embodiment, the called identifier of the IMS domain network and the called identifier of the circuit domain network cannot be corresponding. Therefore, in step 502, the MGCF indexes the called identifier "Myaddr@huawei.com" of the IMS domain network to the ENUM server. Querying the called identifier of the corresponding circuit domain network; after completing the query, in step 503, the ENUM server returns a response message to the MGCF, where the response message includes the query result "1681110", that is, the called identifier of the corresponding circuit domain network. . Thereafter, in step 504, the MGCF performs the query result "1681110" as the called identifier in the circuit domain network call signaling, and the original called party of the IMS domain network call signaling is also set in the circuit domain network call signaling. Mark "Myaddr@huawei.com". Specifically, in this step, the result "1681110" returned by the ENUM server is filled in the start address message (IAM), and the called identifier "Myaddr@" of the IMS domain network is filled in the "UUI" cell of the message. Huawei.com". Thereafter, when processing call signaling of the circuit domain network, the called identifier "1681110" in the circuit domain call signaling in the signaling, and the information in the "UUI" cell may be combined. "Myaddr@huawei.com" to determine the initial caller of the calling user. In this case, since the original called information is retained in the call signaling of the circuit domain network, it is possible to determine the initial calling object of the calling user in subsequent processing. Described above is the call signaling processing for the circuit domain network. When processing the call signaling of the packet domain network, this embodiment also saves the packet domain network by reusing the original "UUI" cell in the call signaling. Called logo. It should be noted that, according to the principle of the present invention, in addition to reusing the original cell in the call signaling and increasing the cell in the call signaling, the original cell in the extended call signaling can be saved to the original network. The purpose of the called identity. The inter-network call connection device of the present invention is used for connecting the cross-network call signaling of the first network to the second network, including:

a first network call signaling receiving unit, configured to receive call signaling from the first network, where the call signaling includes an original called identifier in the first network;

The called identifier querying unit is configured to query the called identifier of the corresponding second network in the user identifier comparison query device according to the original called identifier in the first network;

a second network call signaling sending unit, configured to send call signaling to the second network; the device further includes: a called identifier information setting unit in the first network, when the called identifier of the first network and the second network are The call identifier cannot be configured - in correspondence, the information representing the called identity in the first network is set in the call signaling sent to the second network.

Wherein, when the call signaling of the second network is the integrated service digital network user part signaling, the called identification information setting unit in the first network is set in the "UUI" cell of the integrated service digital network user part signaling The information.

Wherein, when the call signaling of the second network is session initiation protocol signaling, the called identity information setting unit in the first network is in the "To" header field of the session initiation protocol signaling or "P-Called-Party- The information is set in the ID" header field. The connection device is a media gateway control function entity.

Although the invention has been illustrated and described with reference to certain preferred embodiments of the invention It will be apparent to those skilled in the art that various changes in form and details may be made without departing from the spirit and scope of the invention.

Claims

Rights request

An inter-network call connection method, comprising: the gateway device setting a representative first in a call signaling sent to a second network when connecting the first network to the second network cross-network call signaling Information identified by the called party in the network.

The inter-network call connection method according to claim 1, further comprising: determining whether the called identifier in the first network and the called identifier in the second network are operatively-corresponding; if not, Information representing the called identity in the first network is set in the call signaling of the second network.

The inter-network call connection method according to claim 2, further comprising: combining the called identifier in the signaling and the called identifier in the first network when the second network processes the call signaling The information determines the initial call object of the calling user.

The inter-network call connection method according to claim 1, wherein the information representing the called identity in the first network is set in the newly added cell of the call signaling.

The inter-network call connection method according to claim 1, wherein the information representing the called identity in the first network is set in the extended original cell in the call signaling.

The inter-network call connection method according to claim 1, wherein the information representing the called identity in the first network is set in a reused original cell in the call signaling.

The inter-network call connection method according to claim 6, wherein when the call signaling is session initiation protocol signaling, the reused cell is a "To" header field or "P- Called-Party-ID" header field.

8. The inter-network call connection method according to claim 6, wherein when the call signaling is an integrated service digital network user part signaling, the reused cell is a "UUI" cell.

9. The inter-network call connection method according to claim 4 or 5, wherein the call signaling is a session initiation protocol or an integrated service digital network user part protocol.

The inter-network call connection method according to any one of claims 1 to 8, wherein the first network is a packet domain network, and the second network is a circuit domain network; or One network is a circuit domain network and the second network is a packet domain network.

An inter-network call connection device, configured to connect the cross-network call signaling of the first network to the second network, and is characterized by:

The inter-network call connection device according to claim 11, wherein the called identification information setting unit in the first network sets the said in a "UUI" cell of the integrated service digital network user part signaling information.

The inter-network call connection device according to claim 11, wherein the called identification information setting unit in the first network is in a "To" header field of the session initiation protocol signaling or "P-Called-Party" The information is set in the -ID" header field.

The inter-network call connection device according to any one of claims 11 to 13, characterized in that the connection device is a media gateway control function entity.