CN101340728A

CN101340728A - Implementing method, system and apparatus of call

Info

Publication number: CN101340728A
Application number: CNA2008101464084A
Authority: CN
Inventors: 李世前; 王玉勇
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2008-08-28
Filing date: 2008-08-28
Publication date: 2009-01-07

Abstract

The embodiment of the invention discloses a call realization method, a system and a device; the call realization method comprises the steps as follows: a call-back request sent by a calling user is intercepted; the call-back request is analysed; after the call-back request is an international roaming call-back request, the call-back request is re-positioned to a call-back platform; wherein, the call-back platform is used for gaining the calling number and called number carried by the call-back request after the call-back request is received; according to the calling number and the called number, the calls to the calling user and the called user are respectively sent; furthermore, the call of the calling user and the call of the called user are connected with each other. The embodiment of the invention realizes the call-back request sent in a CDMA network, converts the international call called b the user in the roaming place into an international long-distance call called in the home country by the uniform call-back platform, provides the international long-distance service of low charging for the clients, uniformly deploys the call-back platform, and affects the existing equipment less.

Description

Method, system and device for realizing call

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a method, a system and a device for realizing a call.

Background

The international roaming service is a relatively complex service and relates to the problems of operation, protocol compatibility and the like. The technical solution of Global System for Mobile Communications (GSM) UCB (USSD Call Back) international roaming provided in the prior art is implemented based on a USSD (Unstructured Supplementary service Data) central scheme.

When a prepaid user roams out of country, a USSD request is firstly initiated to a USSD center, the request contains a called number, then the USSD center initiates a call to the user, the USSD initiates a call to the called party after the user answers, and the USSD center connects the two calls after the called party answers, thereby realizing the function of roaming out of country of the prepaid user.

In the above technical solution for implementing international roaming, a user is required to initiate USSD operation, which is specific to G network and is not suitable for C network. In addition, the above scheme requires a great modification to the existing network device, and the scheme based on the USSD center has new requirements for an HLR (Home Location Register) and a USSD center, and requires a great deal of modification or upgrade to such a device of the existing network.

Disclosure of Invention

The embodiment of the invention provides a method, a system and a device for realizing calling, which are used for realizing the international roaming of a prepaid subscriber.

In order to achieve the above object, an aspect of the embodiments of the present invention provides a method for implementing a call, including:

intercepting a callback request issued by a calling user;

analyzing the callback request;

after determining that the callback request is an international roaming callback request, redirecting the callback request to a callback platform, wherein the callback platform is used for acquiring a calling number and a called number carried by the callback request after receiving the callback request, respectively initiating calls to a calling user and a called user according to the calling number and the called number, and connecting the call of the calling user and the call of the called user.

On the other hand, an embodiment of the present invention further provides a system for implementing a call, including:

the signaling interception gateway is used for intercepting a callback request issued by a calling subscriber, analyzing the callback request and redirecting the callback request to a callback platform after determining that the callback request is an international roaming callback request;

and the callback platform is used for receiving the callback request redirected by the signaling interception gateway, acquiring a calling number and a called number carried by the callback request, respectively issuing calls to a calling user and a called user according to the calling number and the called number, and connecting the call of the calling user and the call of the called user.

In another aspect, an embodiment of the present invention further provides a signaling interception gateway, including:

the signaling interception module is used for intercepting a callback request sent by a calling user and analyzing the callback request;

and the redirection module is used for redirecting the callback request to a callback platform after determining that the callback request intercepted by the signaling interception module is an international roaming callback request.

In another aspect, an embodiment of the present invention further provides a callback platform, including:

the receiving module is used for receiving a call-back request redirected by the signaling interception gateway;

the analysis module is used for analyzing the callback request received by the receiving module and acquiring a calling number and a called number carried by the callback request message;

and the calling module is used for respectively initiating calls to a calling party and a called party according to the calling number and the called number acquired by the analysis module and connecting the call of the calling party and the call of the called party.

Compared with the prior art, the embodiment of the invention has the following advantages: by the embodiment of the invention, the signaling interception gateway intercepts and analyzes the callback request, redirects the intercepted callback request to the callback platform, and the callback platform respectively continues the call of the calling user and the called user to realize the conversation of the calling user and the called user, thereby realizing the initiation of the callback request in a CDMA (Code Division Multiple Access) network.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic diagram of a connection relationship between a signaling interception gateway and a callback platform according to an embodiment of the present invention;

fig. 2 is a flowchart of a method for implementing a call according to an embodiment of the present invention;

fig. 3 is a flowchart of another call implementation method according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a call flow when an international roaming prepaid subscriber a dials a general subscriber B in a network according to an embodiment C of the present invention;

fig. 5 is a block diagram of a system for implementing a call according to an embodiment of the present invention;

fig. 6 is a structural diagram of a signaling interception gateway according to an embodiment of the present invention;

fig. 7 is a structural diagram of a callback platform according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the embodiment of the present invention intercepts a callback request message through a signaling interception gateway, redirects the callback request to a callback platform, and completes connection and series connection of two calls through the callback platform, thereby implementing initiation of the callback request in a CDMA network. The Signaling interception gateway in the embodiment of the present invention may specifically be a GW-STP (gateway Signaling transfer point, Signaling transfer gateway) or an HLR, but the embodiment of the present invention is not limited to this, and the Signaling interception gateway may also be other communication devices with a Signaling interception function.

The callback platform in the embodiment of the invention can be realized by upgrading the original voice center and can also be realized by a newly added service gateway, and the callback platform can be positioned at an international gateway.

The embodiment of the invention supports the call of the international roaming user, provides the international long distance service with low charge for the user and solves the problem of the prepaid user in the international roaming. And the influence on the current network equipment is small, the GW-STP or the HLR is enabled to have the interception capability of the callback request message by upgrading the GW-STP or the HLR, and a callback platform can be uniformly deployed at an international gateway. The "callback" means that when the international roaming user a wants to call the user B, the user a initiates a signaling request, the system initiates a call to the user a through the intermediate platform component, then initiates a call to the user B, and finally connects the two calls of the user a and the user B. This process is called "call back".

As shown in fig. 2, a flowchart of a method for implementing a call according to an embodiment of the present invention specifically includes:

step S201, intercepting a call-back request issued by a calling user. The method specifically comprises the following steps:

and the signaling interception gateway intercepts a callback request which is transmitted by a calling user and carries a callback identifier.

The method for intercepting the callback request carrying the callback identifier by the signaling interception gateway specifically includes: intercepting a callback request issued by a calling user through a feature code FEATREQ operation, wherein an operation code of the FEATREQ operation is a callback identifier; or,

intercepting a callback request sent by a calling user, wherein the request is identified as the callback request through cell content in an extended MAP (MAP) message.

Step S202, the callback request is analyzed.

Step S203, after the callback request is determined to be the international roaming callback request, the callback request is redirected to a callback platform.

In the embodiment of the invention, after the signaling interception gateway adds the signaling interception function, the passing callback request is intercepted, and the callback request is redirected to the callback platform after the received callback request is determined to be the international roaming callback request. After the signaling interception gateway receives the callback request, the callback request is analyzed instead of being directly transmitted, namely the callback identifier carried in the callback request is analyzed to determine that the request is an international roaming callback request, and then the callback request is redirected to a callback platform.

The callback platform is used for acquiring a calling number and a called number carried by a callback request after receiving the callback request, respectively initiating calls to a calling party and a called party according to the calling number and the called number, and connecting the call of the calling party and the call of the called party.

The method for realizing the call realizes that a call back request is initiated in a CDMA network, a signaling interception gateway intercepts the call back request and redirects the intercepted call back request to a call back platform, the call back platform acquires a calling number and a called number carried by the call back request, calls to a calling user and a called user are respectively initiated according to the calling number and the called number, and the call of the calling user and the call of the called user are connected to ensure that the calling user and the called user carry out conversation. Therefore, the international call initiated by the user in the roaming place is converted into the international long-distance call initiated by the home country through the unified callback platform, the international long-distance service with low cost can be provided for the client, the callback platform is uniformly deployed, and the international roaming of the prepaid user can be realized by slightly modifying the existing equipment.

As shown in fig. 3, a flowchart of another method for implementing a call according to an embodiment of the present invention is shown, and in the embodiment of the present invention, a signaling interception gateway is exemplified as GW-STP. The method specifically comprises the following steps:

in step S301, the international roaming subscriber a initiates a callback request. The callback request carries a callback identifier, if the callback request adopts MAP message, the callback identifier can be obtained by adding MAP operation code, or by expanding cell content in MAP message to identify the request as the callback request.

Step S302, GW-STP intercepts the signal of the call back request message, and determines the request as the call back request according to the MAP operation code or the cell content in the MAP message.

Step S303, GW-STP redirects the call back request message to the call back platform.

And step S304, the callback platform replies a callback request response message to the GW-STP.

Step S305, GW-STP sends call back request response message to user A through MSC (A).

And step S306, the callback platform identifies the callback request message and analyzes the calling number and the called number.

Step S307, the callback platform first initiates a call to the user a, and routes the call to a gateway SSP (Service Switch Point) to which the user a belongs.

Step S308, the gateway SSP to which the user A belongs intelligently interacts with the SCP and the HLR to acquire the roaming number of the user A.

Step S309, the Gateway SSP to which the user a belongs sends an IAM (Initial Address Message) to the msc (a) through a GMSC (Gateway Mobile switching center).

And step S310, after the user A answers, the callback platform plays a sound to the user A to prompt the user A to wait.

Step S311, the callback platform initiates a call to the user B.

Step S312, after user B answers, the callback platform plays the sound to user B to prompt waiting

Step S313, the callback platform connects the callback platform in series to two calls of the user A and the user B, and the user A and the user B are communicated.

In the method for realizing the call, the GW-STP redirects the call back request of the user to the call back platform, the call back platform initiates the call to the two users, and then the two calls are connected in series, so that the two users can communicate. The method and the system realize the initiation of the callback request in the CDMA network, convert the international call initiated by the user in the roaming place into the international long distance call initiated by the home country and make the domestic operators profit. And the operator only needs to upgrade the GW-STP to support callback, namely, the callback request is intercepted and analyzed, and is redirected to the callback platform after the callback request is determined, and the callback platform is deployed uniformly, so that the influence on the current network equipment is small.

In the following, a call flow when an international roaming prepaid subscriber a dials a general subscriber B is described by taking network C as an example, and in the embodiment of the present invention, a signaling interception gateway is taken as a GW-STP as an example for explanation. As shown in fig. 4, the method specifically includes:

step S401, the international roaming user A sends a callback request, the callback request adopts FEATREQ operation, and the FEATREQ operation code is a callback identifier.

Step S402, GW-STP intercepts the FEATREQ message, and analyzes the FEATREQ message as the international roaming callback request.

Step S403, GW-STP redirects FEATREQ message to callback platform

Step S404, the callback platform analyzes the FEATREQ message and sends a callback response message FEATRSP to the GW-STP.

Step S405, GW-STP sends FEATRSP back to user through MSC (A).

Step S406, the callback platform analyzes the calling number A and the called number B, and the IAM is outgoing to the gateway SSP (A) to which the user A belongs. The callback platform can add a callback special prefix in front of the called number in the IAM message, and is used for the user-defined processing of the SSP/SCP for charging.

Step S407, SSP (A) sends LOCREQ message to HLR (A), HLR (A) judges user A as intelligent user, returns intelligent trigger: initial Termination, Location, Called Routing Address Available, taswer (Called answer) and scp (a) Address to ssp (a).

Step S408, SSP (A) detects the Initial Termination trigger, sends Anlyzd message to SCP (A), SCP (A) returns response message. SSP (A) can add a callback special word in the dialing number cell for indicating SCP to carry out callback charging self-defining processing.

Step S409, SSP (A) checks out Location trigger, sends LOCREQ message to HLR (A) to obtain roaming number of user A.

Step S410, hlr (a) obtains the roaming number of subscriber a from msc (a) of subscriber a, and the roaming number is allocated by msc (a).

Step S411, hlr (a) returns roaming number to ssp (a).

Step S412, SSP (A) detects a Called Routing Address Available trigger, sends Anlyzd message to SCP (A), and SCP (A) returns response message. SSP (A) can add callback special word cap to dial number cell for indicating SCP to carry out callback charging self-defining treatment.

Step S413, ssp (a) routes the call to the international gateway GMSC according to the roaming number of the subscriber a.

At step S414, the GMSC routes the call to the msc (a) of subscriber a.

Step S415, the msc (a) pages the user a, and the user a responds to the paging.

Step S416, msc (a) makes assignment request to user a, user a assigns successfully, and user a rings.

In step S417, the msc (a) transmits an ACM (Address Complete Message) to the GMSC.

Step S418, the GMSC sends the ACM to ssp (a).

Step S419, SSP (A) sends ACM to the callback platform.

In step S420, the user a answers.

In step S421, the msc (a) transmits an ANM (Answer Message) to the GMSC.

Step S422, GMSC sends ANM to ssp (a).

At step S423, ssp (a) sends ANM to the callback platform.

Step S424, SSP (A) detects the TANWER trigger, and sends TANSHER message to SCP (A).

Step S425, the callback platform plays the sound to the user A to prompt waiting, and then the called number B and IAM are output to MSC (B).

Step S426, msc (B) sends a LOCREQ message to hlr (B) to obtain the roaming number of subscriber B, and hlr (B) returns the roaming number of subscriber B.

Step S427, the msc (B) pages the user B, and the user B responds to the paging.

Step S428, msc (B) performs assignment request to user B, user B assignment is successful, and B rings.

Step S429, msc (b) sends ACM to the callback platform.

In step S430, user B answers.

Step S431, msc (b) sends ANM to the callback platform.

Step S432, the callback platform is connected with the callback platform in series to two calls of the user A and the user B, and the user A and the user B are communicated.

In the method for realizing the call, the GW-STP intercepts the callback request sent by the FEATREQ operation, redirects the callback request of the user to the callback platform, initiates the call to two users by the callback platform, and then connects the two calls in series, so that the two users can communicate. The method and the system realize the initiation of the callback request in the CDMA network, convert the international call initiated by the user in the roaming place into the international long distance call initiated by the home country and make the domestic operators profit. And can provide international long-distance service with low charge for the customer, and provide international roaming for the prepaid user. And the operator only needs to upgrade the GW-STP to support callback, namely, the callback request is intercepted and analyzed, and is redirected to the callback platform after the callback request is determined, and the callback platform is deployed uniformly, so that the influence on the current network equipment is small. The above embodiment takes C net as an example, but the application of the embodiment of the present invention is not limited to C net, and is also applicable to G net.

As shown in fig. 5, a structure diagram of a call implementation system provided in an embodiment of the present invention includes:

and the signaling interception gateway 51 is configured to intercept a callback request issued by a calling subscriber, analyze the callback request, and redirect the callback request to a callback platform after determining that the callback request is an international roaming callback request. The signaling interception gateway 51 may be specifically a GW-STP or an HLR, but the embodiment of the present invention is not limited thereto, and the signaling interception gateway 51 may also be other communication devices with a signaling interception function.

The callback platform 52 is configured to receive a callback request redirected by the signaling interception gateway 51, acquire a calling number and a called number carried in the callback request, respectively initiate a call to a calling party and a called party according to the calling number and the called number, and connect the call of the calling party and the call of the called party. The callback platform 52 is located at the international gateway.

In the system for implementing the call, the signaling interception gateway 51 intercepts the signaling of the callback request, redirects the intercepted callback request message to the callback platform 52, and the callback platform 52 acquires the calling number and the called number carried by the callback request, respectively initiates calls to the calling subscriber and the called subscriber according to the calling number and the called number, and connects the call of the calling subscriber and the call of the called subscriber, so that the calling subscriber and the called subscriber can communicate. Therefore, the callback request is initiated in the CDMA network, the international call initiated by the user in the roaming place is converted into the international long-distance call initiated by the home country through the unified callback platform 52, the international long-distance service with low cost can be provided for the client, and the callback platform is deployed uniformly, so that the influence on the existing equipment is small.

As shown in fig. 6, a structure diagram of a signaling interception gateway provided in an embodiment of the present invention includes:

the signaling intercepting module 511 is configured to intercept a callback request issued by a calling subscriber, and analyze the callback request.

A redirecting module 512, configured to redirect the callback request to the callback platform 52 after determining that the callback request intercepted by the signaling intercepting module 511 is an international roaming callback request.

In the embodiment of the present invention, the signaling interception gateway 51 may specifically be a GW-STP or an HLR, but the embodiment of the present invention is not limited thereto, and the signaling interception gateway 51 may also be other communication devices with a signaling interception function.

In the signaling interception gateway 51, the signaling interception module 511 performs signaling interception on the callback request sent by the calling party, and after determining that the callback request intercepted by the signaling interception module 511 is an international roaming callback request, the redirection module 512 redirects the callback request to the callback platform 52 so that the callback platform 52 initiates calls to two users, and then connects the two calls in series, so that the two users can communicate, thereby realizing the purpose of initiating the callback request in the CDMA network, converting the international call initiated by the user at the roaming place into the international long distance call initiated by the home country, and benefiting the domestic operators.

As shown in fig. 7, a structure diagram of a callback platform provided in an embodiment of the present invention includes:

a receiving module 521, configured to receive a callback request message redirected by the signaling interception gateway 51;

the parsing module 522 is configured to parse the callback request message received by the receiving module 521, and acquire a calling number and a called number carried in the callback request message;

the calling module 523 is configured to initiate calls to a calling party and a called party respectively according to the calling number and the called number acquired by the parsing module 522, and connect the call of the calling party and the call of the called party.

The calling module 523 includes: a determining submodule 5231, configured to determine, according to the calling number, an SSP to which the calling user belongs, and determine, according to the called number, an SSP to which the called user belongs;

a message sending submodule 5232, configured to send IAM messages to the SSP to which the calling user belongs and the SSP to which the called user belongs.

In the callback platform 52, the receiving module 521 receives the callback request message redirected by the signaling intercepting gateway 51, and the calling module 523 initiates calls to the calling party and the called party respectively according to the calling number and the called number acquired by the analyzing module 522, and connects the call of the calling party and the call of the called party, so that the calling party and the called party can communicate. Therefore, the callback request is initiated in the CDMA network, the international call initiated by the user in the roaming place is converted into the international long-distance call initiated by the home country through the unified callback platform 52, the international long-distance service with low charge can be provided for the client, and the callback platform 52 is deployed uniformly, so that the influence on the existing equipment is small.

Through the above description of the embodiments, those skilled in the art will clearly understand that the present invention may be implemented by hardware, or by software plus a necessary general hardware platform. Based on such understanding, the technical solution of the present invention can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a usb disk, a removable hard disk, etc.), and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments of the present invention.

Those skilled in the art will appreciate that the drawings are merely schematic representations of one preferred embodiment and that the blocks or flow diagrams in the drawings are not necessarily required to practice the present invention.

Those skilled in the art will appreciate that the modules in the devices in the embodiments may be distributed in the devices in the embodiments according to the description of the embodiments, and may be correspondingly changed in one or more devices different from the embodiments. The modules of the above embodiments may be combined into one module, or further split into multiple sub-modules.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

The above disclosure is only for a few specific embodiments of the present invention, but the present invention is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.

Claims

1. A method for implementing a call, comprising:

intercepting a callback request issued by a calling user;

analyzing the callback request;

2. The method for implementing a call according to claim 1, wherein the intercepting of the callback request issued by the calling subscriber specifically comprises:

and intercepting the callback request which is transmitted by the calling user and carries the callback identifier.

3. The method for implementing a call according to claim 2, wherein the intercepting of the callback request with the callback identifier issued by the calling subscriber specifically comprises:

intercepting a callback request issued by the calling user through a feature code FEATREQ operation, wherein an operation code of the FEATREQ operation is a callback identifier; or,

and intercepting a callback request issued by the calling user, wherein the request is identified as the callback request by cell content in the extended MAP message.

4. The method according to claim 2 or 3, wherein said analyzing said callback request specifically comprises:

and determining whether the callback request is an international roaming callback request or not according to the callback identifier in the callback request.

5. A system for implementing a call, comprising:

6. The system as claimed in claim 5, wherein the signaling interception gateway is a signaling transfer gateway GW-STP or a home location register HLR.

7. The system for effectuating a call as recited in claim 5, wherein said callback platform is located at an international gateway.

8. A signaling intercept gateway, comprising:

9. The signaling interception gateway of claim 8 wherein said signaling interception gateway is specifically a signaling transfer gateway GW-STP or a home location register HLR.

10. A callback platform, comprising: