CN110267360B - International roaming communication method, international gateway and communication system for group service - Google Patents
International roaming communication method, international gateway and communication system for group service Download PDFInfo
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Abstract
The invention provides an international roaming communication method based on group service, wherein the international roaming communication method comprises the following steps: responding to a first call request sent by an international gateway of a foreign operator, and inquiring a first called number with a short number in the first call request to obtain a long number of the first called number; determining an operator to which the first called number belongs according to the long number of the first called number; and sending a call request to a call session function control entity of an operator to which the first called number belongs. The invention also provides an international gateway server and a communication system. By using the international roaming communication method, even if the user is in a roaming state, the group service can still be used, and the user experience is improved.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to an international roaming communication method based on group services, an international gateway office server, and a communication system.
Background
With the development of science and technology, terminals (such as mobile phones and the like) become essential articles in life of people. And along with the continuous improvement of the living quality of people, higher requirements are made on the consumption experience.
Group service, that is, mobile Virtual Private Network (WVPN), provides a logical Private Network to some enterprises and groups by using the resources of 2/3G/4G Network and fixed Network, so that these enterprises and groups open services to 2/3G/4G users and PSTN users in the Private Network.
The mobile virtual private network service can give preference to users in a group to a certain degree, and supports flexible numbering function, flexible number display function, flexible dialing mode, closed group user preference, external number group, external calling, flexible control calling, group blocking, user blocking, system forbidden dialing and the like.
However, when the group user is in an international roaming state, the mobile vpn service cannot be used.
Disclosure of Invention
The invention aims to provide an international roaming communication method based on group service, an international gateway server and a communication system. By the international roaming communication method, even if the group user is in the international roaming state, the mobile virtual private network service can still be used.
In order to achieve the above object, as a first aspect of the present invention, there is provided an international roaming communication method based on a group service, wherein the international roaming communication method includes:
responding to a first call request sent by an international gateway of a foreign operator, and inquiring a first called number with a short number in the first call request to obtain a long number of the first called number;
determining an operator to which the first called number belongs according to the long number of the first called number;
and sending a call request to a call session function control entity of an operator to which the first called number belongs.
Preferably, the step of querying the first called number with the short number in the first call request includes:
and acquiring the long number of the first called number sent by a service control point application server of an operator to which the first called number belongs.
Preferably, the step of determining the operator to which the first called number belongs according to the long number of the first called number comprises:
receiving a session initiation protocol uniform resource identifier of the first called number sent by a call session control function entity of a calling side;
and judging the operator to which the called number belongs according to the session initiation protocol uniform resource identifier of the first called number.
Preferably, the international roaming communication method further includes:
and responding to a second call request, and routing the second call request to an international gateway server corresponding to a second calling number in the second call request.
As a second aspect of the present invention, there is provided an international gateway server based on a group service, wherein the international gateway server includes:
the query module is used for responding to a first call request sent by an international gateway of a foreign operator, and querying a first called number with a short number in the first call request to obtain a long number of the first called number;
the operator determining module is used for determining an operator to which the first called number belongs according to the long number of the first called number;
a call request sending module, configured to send a call request to a call session function control entity of an operator to which the first called number belongs.
Preferably, the query module is configured to obtain a long number of the first called number, which is sent by a service control point application server of an operator to which the first called number belongs.
Preferably, the operator determining module is configured to receive a session initiation protocol uniform resource identifier of the first called number sent by a call session control function entity of a calling side, and determine, according to the session initiation protocol uniform resource identifier of the first called number, an operator to which the called number belongs.
Preferably, the call request sending module is further configured to, in response to a second call request, route the second call request to an international gateway server corresponding to a second calling number in the second call request.
As a third aspect of the present invention, there is provided a communication system including a plurality of international gateway servers belonging to a plurality of operators in a plurality of countries, respectively, wherein the international gateway servers are the above-described international gateway servers provided by the present invention.
Preferably, the communication system further includes a plurality of phone number mapping servers/domain name systems, a plurality of service control point application servers, and a plurality of call session control function entities, the plurality of phone number mapping servers/domain name systems respectively belong to operators in different countries, the plurality of service control point application servers respectively belong to a plurality of operators in a plurality of countries, and the plurality of call session control function entities respectively belong to a plurality of operators in a plurality of countries;
the service control point application server is used for responding to a query request sent by an international gateway server of the country to which the service control point application server belongs, and querying a long number corresponding to the first called number from a telephone number mapping server/domain name system of the same country as the service control point application server;
the call session control function entity is used for receiving a call request, wherein the call request comprises a first call request and a second call request.
The international roaming communication method provided by the invention is executed by the international gateway server. When a group user having a first calling number dials a short number in a overseas roaming state, an international gateway server of a foreign operator first routes a call request to the international gateway server of the operator for the first calling number. The international gateway server inquires the first called number, obtains a long number corresponding to the first called number and then completes subsequent access. Therefore, the group user transacting the group service can communicate with the group user of the same operator in China when performing international roaming, and the user experience is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of an international roaming communication method provided by the present invention;
FIG. 2 is a block diagram of a gateway server according to the present invention;
fig. 3 is a block diagram of a communication system provided by the present invention.
Description of the reference numerals
210: the query module 220: operator determination module
230: the call request sending module 310: international gateway server
320: telephone number mapping server/domain name system
330: service control point application server 340: call session control function entity
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
As an aspect of the present invention, there is provided an international roaming communication method based on a group service, wherein as shown in fig. 1, the international roaming communication method includes:
in step S110, in response to a first call request sent by an international gateway of a foreign operator, a first called number with a short number in the first call request is queried to obtain a long number of the first called number;
in step S120, determining an operator to which the first called number belongs according to the long number of the first called number;
in step S130, a call request is sent to a call session function control entity of an operator to which the first called number belongs.
It should be noted that the international roaming communication method provided by the present invention is executed by the international gateway server. When a group user having a first calling number dials a short number in a overseas roaming state, an international gateway server of a foreign operator first routes a call request to the international gateway server of the operator for the first calling number. The international gateway server inquires the first called number and obtains a long number corresponding to the first called number, and then completes subsequent access. Therefore, the group user transacting the group service can communicate with the group user of the same operator in China when performing international roaming, and the user experience is improved.
As a preferred embodiment of the present invention, in step S110, the querying the first called number whose formal number is a short number in the first call request includes:
and acquiring the long number of the first called number sent by a service control point application server of an operator to which the first called number belongs.
All user information (including a long number and a short number of a mobile phone corresponding to a user) in the group service is stored in the service control point application server, and the long number corresponding to the first called number can be quickly obtained by inquiring in the service control point application server.
Preferably, step S130 may include:
receiving a Session Initiation Protocol Uniform Resource Identifier (SIP URI) of the first called number sent by a call Session control function entity of a calling side;
and judging the operator to which the called number belongs according to the SIP URI of the first called number.
Preferably, the international roaming communication method further includes:
and responding to a second call request, and routing the second call request to an international gateway server corresponding to a second calling number in the second call request.
That is, the international gateway server can process not only a call request of a subscriber roaming from the home country to the foreign country but also a call request of a subscriber roaming from the foreign country to the home country.
As a second aspect of the present invention, there is provided an international gateway server based on a group service, wherein, as shown in fig. 2, the international gateway server includes a query module 210, an operator determination module 220, and a call request transmission module 230.
The query module 210 is configured to execute step S110, that is, the query module 210 is configured to, in response to a first call request sent by an international gateway office of a foreign operator, query a first called number, in the first call request, of which a form number is a short number, to obtain a long number of the first called number.
The operator determining module 220 is configured to perform step S120, that is, the operator determining module is configured to determine an operator to which the first called number belongs according to the long number of the first called number.
The call request sending module 230 is configured to execute step S130, that is, the call request sending module 220 is configured to send a call request to a call session function control entity of an operator to which the first called number belongs.
As a preferred embodiment, the query module 210 is configured to obtain a long number of the first called number, which is sent by a service control point application server of an operator to which the first called number belongs.
As a preferred embodiment of the present invention, the operator determining module 220 is configured to receive the SIP URI of the first called number sent by the call session control function entity of the calling side, and determine, according to the SIP URI of the first called number, an operator to which the called number belongs.
As described above, the international gateway server can process not only the call request of the subscriber roaming from the home country to the foreign country but also the call request of the subscriber roaming from the foreign country to the home country. Correspondingly, the call request sending module 230 is further configured to, in response to the second call request, route the second call request to a national gateway server corresponding to the second calling number in the second call request.
As a third aspect of the present invention, there is provided a communication system, as shown in fig. 3, including a plurality of international gateway servers 310, the plurality of international gateway servers 310 respectively belonging to a plurality of operators in a plurality of countries, wherein the international gateway servers 310 are the above-mentioned international gateway servers provided by the present invention.
Preferably, the communication system further comprises a plurality of telephone number mapping servers/domain name systems 320, a plurality of service control point application servers 330 and a plurality of call session control function entities 340. Wherein, the plurality of phone number mapping servers/domain name systems 320 respectively belong to operators of different countries, the plurality of service control point application servers 330 respectively belong to a plurality of operators of a plurality of countries, and the plurality of call session control function entities 340 respectively belong to a plurality of operators of a plurality of countries;
the service control point application server 330 is configured to respond to a query request sent by an international gateway server of a country to which the service control point application server belongs, and query a long number corresponding to the first called number to a telephone number mapping server/domain name system of the same country as the service control point application server.
The call session control function 340 is configured to receive a call request (i.e., INVITE message), which includes a first call request and a second call request.
The following describes how the communication system performs the above-mentioned group service-based international roaming communication method provided by the present invention.
The VoLTE user needs to complete the registration and authentication process when registering the IMS domain abroad. A VoLTE calling user needs to complete a corresponding basic calling process before talking with a called party, and the SIP related signaling flow in the VoLTE calling establishment is the same as the flow of a normal IMS calling; the voice bearer needs to be established in the calling process, after the bearer is established, an update message needs to be sent to a called side, a VoLTE user roams abroad and is registered to an IMS domain as a calling party, and the calling process of calling the user which is registered in the IMS domain domestically is as follows:
the calling user dials the short number of the called user, and the terminal of the calling user initiates a service request message to the base station;
the base station forwards the service request message to the mobile management entity;
the security procedure may be performed according to the policy of the operator.
The mobile management entity initiates a wireless connection establishment request to the base station and sends a user terminal message;
the base station establishes a related radio bearer;
a user terminal sends an uplink data invitation message to a base station;
the base station forwards the invitation message to a service gateway;
the service gateway transmits the invitation message to the proxy gateway;
the service gateway transmits the invitation message to a call session control function entity;
the base station replies a wireless connection establishment request response message to the mobile management entity;
the mobile management entity sends a bearing modification message to the service gateway, and the service gateway can send downlink data to the base station;
the service gateway determines whether to initiate a bearer modification process to the proxy gateway based on the subscription condition;
the proxy gateway replies a bearing modification response message to the service gateway;
the service gateway replies a bearing modification response message to the mobile management entity;
the call session control function entity sends the call message invitation to the network side;
the calling session control function entity triggers a calling side application server according to the subscription information of a calling user, wherein the calling number is a long number, and the called number is a V-network short number;
the application server sends a call invitation (INVITE) message to a call session control function entity to route the called party, wherein the call invitation message comprises a short number requesting that the same resource identifier (REQUEST URI) is the called party;
the calling session control function entity triggers a calling side service control point application server according to the subscription information of a calling user, carries a calling number and a called number, wherein the calling number is a long number, and the called number is a short number of a V network; the service control point application server checks that the calling user is a VPN group user;
according to the called user number and the calling group number, determining that the call is an intra-group call;
inquiring the long and short number comparison table to obtain the long number IP Multimedia Public user Identity (IMPU, IP Multimedia Public Identity) of the called user;
the service control point application server sends an INVITE message to the call session control function entity, where the REQUEST URI is the real number (long number) of the called subscriber.
At this time, the call session control function entity initiates a query to the telephone number mapping server/domain name system, and queries the name authority pointer record of the called number. The telephone number mapping server/domain name system will return the domain name carrying the operator identification and province label, the user number part starts with the routing code, the call session control function entity routes the call to the intercommunication network element of IMS and other networks according to the called domain name. The calling side call session control function entity sends the INVITE message to an international gateway server according to the SIP URI of the called user, and the international gateway judges which operator the called user belongs to according to the SIP URI.
The international gateway office sends the INVITE message to the international gateway office corresponding to the operator to which the called party belongs, and then the international gateway office of the domestic operator sends the INVITE message to the call session control function entity where the called party is located.
The called side call session control function entity sends media information to the called application server;
an application server of the called IMS network needs to inquire a number carrying home location register to select a terminal access domain, and the domain is selected to the IMS domain.
And after receiving the INVITE request, the call session control function entity of the called side triggers the call to a service control point application server of the called side according to the signed information of the called user.
After receiving the INVITE message, the called side service control point application server acquires the calling number from the message, judges that the calling user dials the short number through the domain, and displays the short number as the called user;
a called side service control point application server sends an UDR to an HSS to inquire the position information of a called user;
the called side service control point application server sends INVITE message to the called side call session control function entity to route the called, if the short number is displayed, the short number of the calling user is modified, PAI is the real number of the calling user.
The called side call session control function entity triggers the called side application server, the called side application server provides basic service and routing domain selection, and finally routes the called user terminal;
after receiving the INVITE message, the called user terminal preferentially displays the V network short number according to the FROM header field;
establishing a session through subsequent message interaction of 180ringing, PRACK \200OK, 200OK and the like;
the called side call session control function entity sends a called response message 200OK to the user terminal of the calling user, and the user terminal of the calling user sends a BYE message.
And after receiving the BYE message, the application server of the service control point at the called side writes a ticket and releases the session.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (8)
1. An international roaming communication method based on group service, characterized in that the international roaming communication method comprises:
responding to a first call request sent by an international gateway of a foreign operator, and inquiring a first called number with a short number in the first call request to obtain a long number of the first called number;
determining an operator to which the first called number belongs according to the long number of the first called number;
sending a call request to a call session function control entity of an operator to which the first called number belongs;
the step of determining the operator to which the first called number belongs according to the long number of the first called number comprises the following steps:
receiving a session initiation protocol uniform resource identifier of the first called number sent by a call session control function entity of a calling side;
and judging the operator to which the called number belongs according to the session initiation protocol uniform resource identifier of the first called number.
2. The international roaming communication method of claim 1, wherein the step of querying the first called number whose formal number is a short number in the first call request includes:
and acquiring the long number of the first called number sent by a service control point application server of an operator to which the first called number belongs.
3. The international roaming communication method of claim 1 or 2, wherein the international roaming communication method further includes:
and responding to a second call request, and routing the second call request to an international gateway server corresponding to a second calling number in the second call request.
4. An international gateway server based on group services, the international gateway server comprising:
the query module is used for responding to a first call request sent by an international gateway of a foreign operator, and querying a first called number with a short number in the first call request to obtain a long number of the first called number;
the operator determining module is used for determining an operator to which the first called number belongs according to the long number of the first called number;
a call request sending module, configured to send a call request to a call session function control entity of an operator to which the first called number belongs;
the operator determining module is used for receiving a session initiation protocol uniform resource identifier of the first called number sent by a call session control function entity of a calling side, and judging an operator to which the called number belongs according to the session initiation protocol uniform resource identifier of the first called number.
5. The international gateway server according to claim 4, wherein the query module is configured to obtain a long number of the first called number sent by a service control point application server of an operator to which the first called number belongs.
6. The international gateway office server according to claim 4 or 5, wherein the call request sending module is further configured to route the second call request to an international gateway office server corresponding to the second calling number in the second call request in response to the second call request.
7. A communication system comprising a plurality of international gateway servers belonging to a plurality of operators in a plurality of countries, respectively, characterized in that the international gateway servers are the international gateway servers according to any one of claims 4 to 6.
8. The communication system according to claim 7, wherein the communication system further comprises a plurality of telephone number mapping servers/domain name systems respectively belonging to operators of different countries, a plurality of service control point application servers respectively belonging to a plurality of operators of a plurality of countries, and a plurality of call session control function entities respectively belonging to a plurality of operators of a plurality of countries;
the service control point application server is used for responding to a query request sent by the national gateway server of the service control point application server, and querying a long number corresponding to the first called number from a telephone number mapping server/domain name system belonging to the same country as the service control point application server;
the call session control function entity is used for receiving a call request, wherein the call request comprises a first call request and a second call request.
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| CN100512464C (en) * | 2006-09-22 | 2009-07-08 | 中国移动通信集团公司 | Home location short number service system, platform and implementation method |
| CN101374345B (en) * | 2008-07-24 | 2013-04-17 | 华为技术有限公司 | Method, apparatus and system for transferring wireless virtual private network VPN short number of calling subscriber |
| CN102131171A (en) * | 2010-01-20 | 2011-07-20 | 华为技术有限公司 | Method and device for realizing cross-regional virtual private network service |
| CN107135132A (en) * | 2016-02-26 | 2017-09-05 | 中国移动通信集团公司 | A kind of network intercommunication method and network entity, controlled entity |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101547416A (en) * | 2008-03-28 | 2009-09-30 | 株式会社日立制作所 | Call transfer system and call transfer control method |
| CN101715178A (en) * | 2008-10-08 | 2010-05-26 | 中兴通讯股份有限公司 | Number portability implementation method and device and calling implementation method and device of user terminal |
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