CN110324814A - International roaming communication means, gateway exchange, conversation control function entity and communication system - Google Patents

Abstract

The present invention provides a first international roaming communication method, including: in response to a first call request, sending the first call request to the international gateway server of the initial registration operator of the first calling number involved in the first call request A call request; in response to the response information from the international gateway office server of the operator to which the first called number is ported, control the network element of the operator on this side to communicate with the network element to which the first called number is transferred. The bearer is established between network elements of the carrier to which the network is connected. The present invention also provides a second international roaming communication method, a second international roaming communication method, an international gateway office server for executing the first international roaming communication method, and an international gateway server for executing the second international roaming communication method. A call session control functional entity of a communication method and a communication system. The combination of the first international roaming communication method and the second international roaming communication method can realize international roaming of number portability users and improve user experience.

Description

International roaming communication method, gateway office, session control functional entity and communication system

technical field

The present invention relates to the field of communication technology, in particular, to a first international roaming communication method, a second international roaming communication method, an international gateway office server executing the first international roaming communication method, and a method for A call session control functional entity implementing the second international roaming communication method and a communication system.

Background technique

With the development of science and technology, terminals (such as mobile phones, etc.) have become a necessity in people's lives. And as people's quality of life continues to improve, they have higher requirements for consumer experience.

In the prior art, operator networks (China Unicom, China Mobile, and China Telecom) implement a number portability policy to improve people's consumption experience. Therefore, how to realize the normal communication of the user after the number portability transfer has become a technical problem to be solved urgently.

Contents of the invention

The purpose of the present invention is to provide a first international roaming communication method, a second international roaming communication method, an international gateway office server for executing the first international roaming communication method, and an international gateway server for executing the second international roaming communication method. A call session control functional entity of an international roaming communication method and a communication system. Through the first international roaming communication method and the second international roaming communication method, the international roaming communication of the number portability user can be realized.

In order to achieve the above object, as an aspect of the present invention, a first international roaming communication method is provided, wherein the first international roaming communication method includes:

In response to the first call request, sending the first call request to the international gateway server of the initial registration operator of the first calling number involved in the first call request, wherein the first calling number’s The initial registration operator is the operator of the country to which the first calling number belongs;

In response to the response information from the international gateway office server of the operator to which the first called number ported to the network, control the network element of the operator on the local side and the operator to which the first called number is transferred. The bearer is established between the NEs.

Preferably, the first international roaming communication method further includes:

In response to the second call request, query whether the second calling number involved in the second call request is ported to another network;

In response to the response information of the portability of the second calling number, the second call request is sent to the international gateway server of the operator to which the second calling number is transferred.

Preferably, the first international roaming communication method further includes:

In response to the third call request, query whether the third call number involved in the third call request is ported to another network;

In response to the response information of the number portability of the third call number, sending the response information of the number portability of the third call number to the international gateway server of the country that generated the third call request.

As a second aspect of the present invention, a second international roaming communication method is provided, wherein the second international roaming communication method includes:

In response to the first call request, query whether the first called number involved in the first call request is ported to another network, wherein the first call request is sent in the first international roaming caller communication method a first call request to the international gateway server of the initial registration operator of the first calling number;

When receiving the query result of the number portability of the first called number to the network, send the first call request to the interconnection border control functional entity on the local side, so that the interconnection border control functional entity of the operator on the local side will The first call request is sent to the interconnection border control function entity of the operator to which the first called number is transferred.

Preferably, in the step of inquiring whether the first called number involved in the first call request is ported to the network, a query request is sent to the application server on this side, so as to control the application server to call the telephone number mapping server Query whether the first called number is ported to another network.

As a third aspect of the present invention, an international gateway server is provided, wherein the international gateway server includes:

A call request sending module, the call request sending module is configured to send the first call request to the international gateway server of the initial registration operator of the first calling number involved in the first call request in response to the first call request. A call request, wherein the initial registered operator of the first calling number is an operator in the country to which the first calling number belongs;

A bearer establishment module, the bearer establishment module is used to respond to the response information of the international gateway office server of the operator to which the first called number is ported, and control the network element of the operator on this side to communicate with the said A bearer is established between network elements of the operator to which the first called number is transferred.

Preferably, the international gateway server further includes a first query module, the first query module is used to query whether the second calling number involved in the second call request is ported or not in response to the second call request. network;

The call request sending module is further configured to send the second call request to the international network of the operator to which the second calling number is transferred in response to the response information of the second calling number portability transfer. Gateway server.

Preferably, the first inquiry module is further configured to inquire whether the third call number involved in the third call request is ported to the network in response to the third call request;

The call request sending module is further configured to send the response information of the third call number portability to the country that generated the third call request in response to the response information of the third call number portability The international gateway server.

As a fifth aspect of the present invention, a call session control function entity is provided, wherein the call session control function entity includes:

A second inquiry module, the second inquiry module is configured to inquire whether the first called number involved in the first call request is transferred to the network in response to the first call request, wherein the first call request is The first call request sent by the international gateway server to the international gateway server of the initial registration operator of the first calling number;

A call request forwarding module, the call request forwarding module is configured to send the first call request to the interconnection border control functional entity on this side when receiving the query result of the number portability transfer of the first called number, so that the interconnection border control functional entity of the operator on the local side sends the first call request to the interconnection border control functional entity of the operator to which the first called number is transferred.

As the fifth aspect of the present invention, a communication system is provided. The communication system includes multiple international gateway servers, multiple call session control functional entities, multiple application servers, multiple interconnected border control functional entities, multiple The telephone number mapping server, the multiple international gateway servers belong to multiple operators in multiple countries, the multiple call session control functional entities respectively belong to multiple operators in multiple countries, and the multiple application servers respectively belong to multiple operators in multiple countries. Multiple operators in multiple countries, multiple telephone number mapping servers respectively belong to multiple operators in multiple countries, multiple interconnected border control functional entities respectively belong to multiple operators in multiple countries, wherein the international gateway The office server is the above-mentioned international gateway office server provided by the present invention, and the call session control functional entity is the above-mentioned call session control functional entity provided by the present invention,

The application server is configured to, in response to the query request, query the phone number mapping server on the same side whether the phone number involved in the query request is ported to the network and generate corresponding response information;

The interconnection border control functional entity is used to send the received called request to the called number's call request sent by the call session control functional entity on the same side, including the called number ported to the network. The Interconnected Border Control functional entity of the forwarded operator.

The first international roaming communication method provided by the present invention is executed by an international gateway server.

The first call request is a call request sent by a foreign mobile phone number (first calling number) roaming abroad to the home country. After receiving the first call request, first according to the form of the first calling number Judging is performed to determine the initial registration operator to which the first calling number belongs. Then, a first call request is sent to the initial registered operator of the first mobile phone number. After receiving the first call request, the initial registration operator starts to attach the user. During the user attach process, if it is determined that the first calling number is not ported to the network, then the bearer is directly established. However, during the process of user attachment, if it is determined that the first calling number has been ported to another network, the initial registration operator will forward the first call request to the operator to which the first calling number is transferred. network element of the provider.

The network element of the operator to which the first calling number is transferred will further inquire whether the first called number involved in the first call request is ported to the network. When the first called number is not ported to the network, the bearer is directly established. When the first called number is ported to the network, the network element of the operator to which the first calling number is transferred forwards the first call request to the network element to which the first called number is transferred to The network element of the operator sends a corresponding response message to the server of the international gateway office. The international gateway server controls the network element of the operator on the local side to establish a bearer with the network element of the operator to which the first called number is transferred.

The second international roaming communication method provided by the present invention is executed by the call session control function (CSCF, Call Session Control Function) entity of the operator initially registering the called number.

When the international gateway server of the operator currently mentioned by the first calling number is sent to the international gateway server of the operator initially registered with the first called number, and the first called number After the first call request forwarded by the international gateway office server of the initial registration operator of the number, the call session control function entity inquires about the first called number to determine whether the first called number is a number portability switch network.

When the query result shows that the first called number has ported the number to the network, the first call request can be sent to the Interconnection Border Control Function (IBCF, Interconnection Border Control Functions) entity on the local side, and the interconnection border control function (IBCF) entity on the local side can The border control function entity sends the first call request to the interconnection border control function entity of the operator to which the first called number is transferred, so that the connection between the first calling number and the first called number can be Establish a call.

Through the combination of the first international roaming communication method and the second international roaming communication method, the communication between the first calling number whose number transfer has occurred and the first called number whose number transfer has occurred can be realized international roaming calls to improve user experience.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, together with the following specific embodiments, are used to explain the present invention, but do not constitute a limitation to the present invention. In the attached picture:

Fig. 1 is a flow chart of a specific embodiment of the first international roaming communication method provided by the present invention;

Fig. 2 is a flow chart of a specific embodiment of the second international roaming communication method provided by the present invention;

Fig. 3 is the block diagram of the international gateway office server provided by the present invention;

FIG. 4 is a block diagram of a call session control functional entity provided by the present invention;

Fig. 5 is a block diagram of the communication system provided by the present invention.

Detailed ways

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, not to limit the present invention.

As an aspect of the present invention, a first international roaming communication method is provided, wherein, as shown in FIG. 1 , the first international roaming communication method includes:

In step S110, in response to the first call request, send the first call request to the international gateway server of the initial registration operator of the first calling number involved in the first call request, wherein the first call request The initial registration operator of a calling number is the operator of the country to which the first calling number belongs;

In step S120, in response to the response information from the international gateway office server of the operator to which the first called number is ported, control the network element of the operator on the local side to communicate with the first called number. A bearer is established between network elements of the forwarded operator.

The first international roaming communication method provided by the present invention is executed by an international gateway server.

The first call request is a call request sent by a foreign mobile phone number (first calling number) roaming abroad to the home country. After receiving the first call request, first according to the form of the first calling number Judging is performed to determine the initial registration operator to which the first calling number belongs. Then, a first call request is sent to the initial registered operator of the first mobile phone number. After receiving the first call request, the initial registration operator starts to attach the user. During the user attach process, if it is determined that the first calling number is not ported to the network, then the bearer is directly established. However, during the process of user attachment, if it is determined that the first calling number has been ported to another network, the initial registration operator will forward the first call request to the operator to which the first calling number is transferred. network element of the provider.

The network element of the operator to which the first calling number is transferred will further inquire whether the first called number involved in the first call request is ported to the network. When the first called number is not ported to the network, the bearer is directly established. When the first called number is ported to the network, the network element of the operator to which the first calling number is transferred forwards the first call request to the network element to which the first called number is transferred to The operator's network element sends corresponding response information to the international gateway office server performing step S110.

In step S120, the international gateway server controls the network element of the operator on the local side to establish a bearer with the network element of the operator to which the first called number is transferred.

Through the above steps, the international roaming call of the number portability user can be completed. Specifically, the following international roaming calls can be realized:

The communication between the first calling number that has ported the number and is roaming overseas and the first called number that has not ported the number;

The communication between the first calling number that has not ported the number and is roaming overseas and the first called number that has not ported the number;

The communication between the first calling number that has ported the number and is roaming overseas and the first called number that has ported the number;

The communication between the first calling number that has not ported its number and is roaming overseas and the first called number that has ported its number.

Using the first international roaming communication method provided by the present invention can realize the overseas roaming communication of the number portability subscriber, thereby improving the user experience.

In the present invention, there is no special limitation on how to execute step S120. Specifically, step S120 can be realized by the following method:

The international gateway server on the local side sends the first call request to the call session control functional entity on the local side;

The call session control function entity on the local side sends the first call request to the application server on the local side;

The application server on the local side sends the first call request to the corresponding base station to complete the subsequent call connection process.

In addition to responding to the calling request sent by the first mobile phone number roaming to the country, the international gateway server can also respond to the second call request sent by the international gateway server abroad after the mobile phone number in the country roams abroad. respond. Specifically, the first international roaming communication method further includes:

In response to the second call request, query whether the second calling number involved in the second call request is ported to another network;

In response to the response information of the portability of the second calling number, the second call request is sent to the international gateway server of the operator to which the second calling number is transferred.

Specifically, when the second calling number is attached, it may be checked whether the second calling number is ported to the network.

In addition to responding to the first call request and responding to the second call request, the international gateway server may also be an international gateway server of the operator to which the called number belongs. Specifically, the first international roaming communication method further includes:

In response to the third call request, query whether the third call number involved in the third call request is ported to another network;

In response to the response information of the number portability of the third call number, sending the response information of the number portability of the third call number to the international gateway server of the country that generated the third call request.

As a second aspect of the present invention, a second international roaming communication method is provided, wherein, as shown in FIG. 2 , the second international roaming communication method includes:

In step S210, in response to the first call request, it is inquired whether the first called number involved in the first call request is ported to the network, wherein the first call request is the above-mentioned first number provided by the present invention. The first call request sent to the international gateway office server of the initial registration operator of the first calling number in the international roaming caller communication method;

In step S220, when receiving the query result of the number portability transfer of the first called number, the first call request is sent to the interconnection border control functional entity on the local side, so that the interconnection of the operator on the local side The border control function entity sends the first call request to the interconnection border control function entity of the operator to which the first called number is transferred.

The second international roaming communication method provided by the present invention is executed by the call session control function (CSCF, Call Session Control Function) entity of the operator initially registering the called number.

When the international gateway server of the operator currently mentioned by the first calling number is sent to the international gateway server of the operator initially registered with the first called number, and the first called number After the first call request forwarded by the international gateway office server of the initial registration operator of the number, the call session control function entity inquires about the first called number to determine whether the first called number is a number portability switch network.

When the query result shows that the first called number has ported the number to the network, the first call request can be sent to the Interconnection Border Control Function (IBCF, Interconnection Border Control Functions) entity on the local side, and the interconnection border control function (IBCF) entity on the local side can The border control function entity sends the first call request to the interconnection border control function entity of the operator to which the first called number is transferred, so that the connection between the first calling number and the first called number can be Establish a call.

Through the combination of the first international roaming communication method and the second international roaming communication method, the communication between the first calling number whose number transfer has occurred and the first called number whose number transfer has occurred can be realized international roaming calls to improve user experience.

It should be pointed out that when the call is made between the first calling user who has transferred the number to the network and the first called user who has transferred the number to the network, it needs to go through the international gateway server of the country where the first calling user is currently located. , the international gateway server of the operator initially registered by the first calling user, the international gateway server of the operator to which the first calling user is transferred, the international gateway server of the operator initially registered by the first called user, the first The call between the first calling user roaming overseas and the first called user can be realized only when the international gateway server of the operator to which the called user currently belongs participates together.

In the present invention, there is no special limitation on how to inquire whether the first called number is ported to the network. As a preferred implementation mode, in step S210, the application server (AS, Application Service) on this side sends The query request is used to control the application server to query a telephone number mapping server (ENUM, E.164Number URI Mapping) whether the first called number is ported to the network.

As a third aspect of the present invention, an international gateway server is provided, wherein, as shown in FIG. 3 , the international gateway server includes a call request sending module 310 and a bearer establishing module 320 . The international gateway server is used to implement the first international roaming communication method provided by the first aspect of the present invention, specifically:

The call request sending module 310 is used to perform step S110, that is, the call request sending module 310 is used to respond to the first call request, send the first calling number involved in the first call request to the international gateway of the initial registration operator The office server sends the first call request, wherein the initial registered operator of the first calling number is an operator in the country to which the first calling number belongs.

The bearer establishment module 320 is used to execute step S120, that is, the bearer establishment module 320 is used to respond to the response information from the international gateway office server of the operator to which the first called number transfers to the network, and control the A bearer is established between the network element of the operator and the network element of the operator to which the first called number is transferred.

The working principle and beneficial effects of the first international roaming communication method have been described in detail above, and will not be repeated here.

Preferably, the international gateway server may further include a first query module 330, which is configured to, in response to the second call request, query whether the second calling number involved in the second call request carries The number is transferred to the network.

Correspondingly, the call request sending module 310 is also configured to send the second call request to the operator to which the second calling number is transferred in response to the response information of the second calling number portability transfer. The international gateway server.

Preferably, the first query module 330 is further configured to, in response to the third call request, query whether the third call number involved in the third call request is ported to another network.

Correspondingly, the call request sending module 310 is further configured to send the response information of the third call number portability to the network for generating the third call request in response to the response information of the third call number portability. The country's international gateway server.

As a fourth aspect of the present invention, a call session control function entity is provided, wherein, as shown in FIG. 4 , the call session control function entity includes a second query module 410 and a call request forwarding module 420 . The call session control function entity is used to implement the second international roaming communication method provided by the second aspect of the present invention, specifically,

The second query module 410 is used to perform step S210, that is, the second query module 410 is used to query whether the first called number involved in the first call request is ported to the network in response to the first call request, wherein, The first call request is the first call request sent by the above-mentioned international gateway server provided by the present invention to the international gateway server of the initial registration operator of the first calling number.

The call request forwarding module 420 is configured to perform step S220, that is, the call request forwarding module 420 is configured to send the first call request to the local side when receiving the query result of the number portability of the first called number The interconnected border control functional entity of the operator, so that the interconnected border control functional entity of the operator on the local side sends the first call request to the interconnected border control functional entity of the operator to which the first called number is transferred.

The working principle and beneficial effects of the second international roaming communication method have been described in detail above, and will not be repeated here.

As a fifth aspect of the present invention, a communication system is provided. As shown in FIG. 5, the communication system includes multiple international gateway servers 510, multiple call session control function entities 520, multiple application servers 530, multiple An interconnected border control function entity 540 and a plurality of telephone number mapping servers 550. Multiple international gateway servers 510 respectively belong to multiple operators in multiple countries, multiple call session control function entities 520 respectively belong to multiple operators in multiple countries, and multiple application servers 530 respectively belong to multiple operators in multiple countries. Operators, multiple interconnection border control functional entities 540 respectively belong to multiple operators in multiple countries, and multiple telephone number mapping servers 550 respectively belong to multiple operators in multiple countries.

Wherein, the international gateway server 510 is the above-mentioned international gateway server provided by the present invention, and the call session control function entity 520 is the above-mentioned call session control function entity provided by the present invention.

The application server 530 is configured to, in response to the query request, query the phone number mapping server 550 on the same side whether the phone number involved in the query request is ported to another network, and generate corresponding response information.

The interconnection border control function entity 540 is configured to, after receiving the call request from the call session control function entity 520 on the same side that includes the called number ported to the network, send the received called request to the called number's The Interconnected Border Control functional entity of the forwarded operator.

The working principle of the communication system provided by the present invention will be described below in conjunction with a specific implementation manner.

VoLTE users must first complete the attachment process when starting up abroad, then register to the IMS network, and then complete the call signaling establishment, call connection and other processes.

The VoLTE calling user (that is, the user corresponding to the first calling number) needs to complete the corresponding basic call process before talking with the called party (that is, the user corresponding to the first called number). The SIP related information in the VoLTE call establishment The flow is the same as that of a normal IMS call; a voice bearer needs to be established during the call, and an update message must be sent to the called side after the bearer is established. , the user corresponding to the first calling number) registers to the IMS abroad as the calling party, and the VoLTE user of the second operator transfers the network to the first operator (that is, the user corresponding to the first called number) in the foreign IMS The call flow as the called party in the network is as follows:

When the user terminal with the first calling number initiates a call abroad, it sends a service request message to the base station; the base station forwards the service request message to the management entity of the first operator; according to the operator's strategy, a security process can be implemented;

The management entity of the first operator initiates a radio connection establishment request to the base station and sends a user terminal message, and the base station establishes a related radio bearer;

The user terminal of the first calling number sends an uplink invitation message (INVITE) (that is, the first call request) to the base station, and the base station transfers the INVITE to the serving gateway;

The serving gateway forwards the INVITE to the agent gateway, the serving gateway forwards the INVITE to the call session control function entity, and the base station replies a wireless connection establishment request response message to the management entity of the first operator;

The management entity of the first operator sends a bearer modification message to the service gateway, and the service gateway can then send downlink data to the base station, and the service gateway decides whether to initiate a bearer modification process to the proxy gateway based on the subscription status, and the proxy gateway replies with a bearer modification response message to the service gateway ; The serving gateway replies a bearer modification response message to the management entity of the first operator;

The call session control function entity of the foreign operator routes the INVITE message to the international gateway server of the foreign operator, and the international gateway server of the foreign operator sends the INVITE message to the international gateway server of the first operator;

When the user attaches, the international gateway server of the first operator finds that the user has transferred the number to the second operator, so the international gateway server of the first operator sends the message to the second operator’s The international gateway server, the international gateway server of the second operator sends the bearer establishment message to the CSCF of the second operator, the CSCF then initiates a query to the application server of the second operator, and the application server then goes to the second operator’s Query the number portability home register, and get the response message that the user has transferred the number portability to the first operator;

The CSCF of the second operator transfers the INVITE message to the IBCF of the second operator, and then the IBCF of the second operator sends the INVITE message to the IBCF of the first operator, and the IBCF of the first operator sends the INVITE to the IBCF of the first operator CSCF of the first operator, the CSCF of the first operator queries the application server of the first operator, the application server of the first operator queries the HSS of the first operator, and obtains that the user has registered in the IMS of the foreign operator information, and return the message to the CSCF of the first operator;

The call session control function entity of the first operator sends the INVITE message to the international gateway server of the first operator, and the international gateway server of the first operator sends the INVITE message to the international gateway server of the foreign operator where the called user is located. Gateway server;

The international gateway server of the foreign operator sends the INVITE message to its own call session function control entity, and the call session function control entity of the foreign operator sends a message to the application server for query, and the application server goes to the HSS to query the registration information of the user. Routing the message to the corresponding base station, and the base station sends the message to the called user terminal;

All subsequent messages follow the same route, from the foreign operator registered by the user to the second operator, then to the first operator, the first operator to the foreign operator, and the foreign operator to the IMS network element , to complete the processes of user registration on the IMS network, bearer establishment, call establishment, and termination.

It can be understood that, the above embodiments are only exemplary embodiments adopted for illustrating the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (10)

1. a kind of First International's roaming communication method, which is characterized in that First International's roaming communication method includes:

In response to the first call request, the initial registration operator of the first calling number involved in the first call request of Xiang Suoshu International gateway server send first call request, wherein the initial registration operator of first calling number For the operator of first calling number belonging country；

Turn the echo message of the international gateway server of the gone to operator of net in response to the first called number number of taking, Carrying is established between the network element for the operator that the operator's network element and first called number for controlling this side are gone to.

2. First International's roaming communication method according to claim 1, which is characterized in that First International's roaming communication Method further include:

In response to the second call request, inquiring the second calling number involved in second call request, whether the number of taking turns net；

The echo message for turning net in response to the second calling number number of taking, is sent to described second for second call request The international gateway server for the operator that calling number is gone to.

3. First International's roaming communication method according to claim 1 or 2, which is characterized in that First International's roaming Communication means further include:

In response to third call request, inquiring third call number involved in the third call request, whether the number of taking turns net；

The third call number number of taking is turned the response of net by the echo message for turning net in response to the third call number number of taking Information is sent to the international gateway server for generating the country of the third call request.

4. a kind of Second International's roaming communication method, which is characterized in that Second International's roaming communication method includes:

In response to the first call request, inquiring the first called number involved in first call request, whether the number of taking turns net, Wherein, first call request is that the First International described in any one of claims 1 to 3 roams in calling communication method First call request of the international gateway server of the transmitted initial registration operator to the first calling number；

When receiving the query result of the first called number number of taking turn net, first call request is sent to this side Interconnected Border control function entity so that the Interconnected Border control function entity of this side operator by it is described first calling ask Seek the Interconnected Border control function entity for being sent to the operator that first called number is gone to.

5. Second International's roaming communication method according to claim 4, which is characterized in that asked inquiring first calling Whether the number of taking turned in the step of netting first called number involved in asking, and sent inquiry request to the application server of this side, To control the application server, to telephone number mapping server inquiry first called number, whether the number of taking turns net.

6. a kind of international gateway server, which is characterized in that the international gateway server includes:

Call request sending module, the call request sending module are used in response to the first call request, and Xiang Suoshu first is exhaled The international gateway server of the initial registration operator of the first calling number involved in request is made to send first calling Request, wherein the initial registration operator of first calling number is the operator of first calling number belonging country；

Module is established in carrying, and the carrying establishes module for turning the gone to fortune of net in response to the first called number number of taking The echo message of the international gateway server of quotient is sought, the operator's network element and first called number for controlling this side are gone to Operator network element between establish carrying.

7. international gateway server according to claim 6, which is characterized in that the international gateway server also wraps The first enquiry module is included, first enquiry module is used to inquire in second call request in response to the second call request Whether the number of taking turns net to the second calling number being related to；

The call request sending module is also used to turn in response to the second calling number number of taking the echo message of net, will be described Second call request is sent to the international gateway server for the operator that second calling number is gone to.

8. international gateway server according to claim 7, which is characterized in that first enquiry module is also used to ring Should be in third call request, inquiring third call number involved in the third call request, whether the number of taking turns net；

The call request sending module is also used to turn in response to the third call number number of taking the echo message of net, will be described The echo message that the third call number number of taking turns net is sent to the international gateway clothes for generating the country of the third call request Business device.

9. a kind of call conversation control function entity, which is characterized in that the call conversation control function entity includes:

Second enquiry module, second enquiry module are used to inquire first call request in response to the first call request Involved in the first called number whether the number of taking turns net, wherein first call request be claim 6 to 8 in it is any one International gateway server described in is sent to the international gateway server of the initial registration operator of the first calling number The first call request；

Call request forwarding module, the call request forwarding module are used to turn net receiving the first called number number of taking Query result when, first call request is sent to the Interconnected Border control function entity of this side so that this side transport First call request is sent to the operation that first called number is gone to by the Interconnected Border control function entity of battalion quotient The Interconnected Border control function entity of quotient.

10. a kind of communication system, the communication system includes multiple international gateway servers, multiple call session control function Entity, multiple application servers, multiple Interconnected Border control function entities, multiple telephone number mapping servers, it is multiple described International gateway server is belonging respectively to multiple operators of multiple countries, multiple call conversation control function entity difference Belong to multiple operators of multiple countries, multiple application servers are belonging respectively to multiple operators of multiple countries, multiple phones Number mapping server is belonging respectively to multiple operators of multiple countries, and multiple Interconnected Border control function entities are belonging respectively to more Multiple operators of a country, which is characterized in that the international gateway server is any one of claim 6 to 8 institute The international gateway server stated, the call conversation control function entity are Call-Establish-Success rate function as claimed in claim 9 Energy entity,

The application server is used to inquire the inquiry in response to inquiry request to ipsilateral telephone number mapping server and ask Whether the number of taking turns net and generates corresponding echo message telephone number involved in asking；

The Interconnected Border control function entity is used for After the number of taking turns the call request of the called number of net, the called request received is sent to the operation that the called number is gone to The Interconnected Border control function entity of quotient.