CN1960505A - Method and system for implementing virtual subscriber exchange service in wide area, and call controller - Google Patents

Abstract

The method features the following: the call controller at calling side sends the short number of wide area centrex (WAC) of calling terminal to the called terminal through call controller at called side; the calling terminal initiates a call to the call controller at calling side; the calling controller at calling side initiates a call to the call controller at called side, and meanwhile sends the short number of WAC of the calling terminal to the call controller at called side; the call controller at called side initiates a call to the called terminal, and meanwhile sends the short number of WAC of the calling terminal to the called terminal; the called terminal establishes the call connection to the calling terminal.

Description

Method, system and call controller for realizing wide area virtual user exchanger service

Technical Field

The present invention relates to communication technology, and in particular, to a method, system, and call controller for implementing a wide area virtual private branch exchange service.

Background

With the development of communication technology, a wide area virtual private branch exchange (WAC) service is proposed, which can combine users distributed in different softswitches or exchanges into a WAC user group to implement virtual internal communication.

Fig. 1 shows a typical system architecture for implementing WAC services. As shown in fig. 1, the system for implementing the WAC service includes a calling terminal, a calling party call controller, a next generation network/public switched telephone network (NGN/PSTN), a called party call controller, and a called terminal.

The calling party call controller records the user data and WAC information of the calling terminal, and the called party call controller records the user data and WAC information of the called terminal. The WAC information comprises: WAC group number, WAC group name and WAC group user identification. Wherein, the user identifier in the WAC group comprises: short number in WAC group, calling name and other information.

WAC subscribers typically have two numbers: one of them is a public network number, generally called a subscriber number, provided by a telecommunications operator; the other is a number used in the WAC group, and is generally called a short number because the number is relatively short.

The basic idea for realizing the WAC service is as follows: when two users in the WAC group want to communicate, a calling terminal firstly initiates a call to a calling party calling controller; the calling party call controller sends a call request message carrying the number of a calling terminal user to a called party call controller; the called party call controller initiates a call to a called terminal and sends a calling terminal user number to the called terminal in the calling process; the called terminal displays the user number of the calling terminal and communicates with the calling terminal.

At present, if a calling terminal and a called terminal belong to user terminals under different call controllers, a call needs to be realized through a public NGN/PSTN network, and the NGN/PSTN network can only carry out interaction according to user numbers. The called party call controller receives the calling terminal user number, so the called terminal can only display the user number of the calling terminal. That is to say, when two users belonging to the same WAC user group communicate, the called terminal displays the number of the calling terminal user for communicating with the users outside the WAC user group, which obviously affects the user experience and is not beneficial to the popularization of the WAC service.

Therefore, if two user terminals in the WAC group belong to different call controllers, the called terminal cannot obtain and display the short number in the WAC group of the calling terminal.

Disclosure of Invention

In view of this, the main objective of the present invention is to provide a method, a system and a call controller for implementing a wide area virtual private branch exchange service, which can enable a called terminal to obtain a short number in a calling terminal WAC group during a call, and enhance the experience effect of a user on the WAC service.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

a method for realizing wide area virtual user exchanger service, the method is:

a. a calling terminal initiates a call to a calling party call controller, the calling party call controller initiates a call to a called party call controller, and a short number in a calling terminal wide area virtual subscriber switch (WAC) group is sent to the called party call controller in the calling process;

b. the called party call controller initiates a call to a called terminal and sends the WAC group short number of the calling terminal to the called terminal in the calling process;

c. the called terminal and the calling terminal establish a call to carry out conversation.

Preferably, the method for the calling party call controller to send the short number in the WAC group of the calling terminal to the called party call controller in step a includes:

the calling party call controller sends a call request message carrying the short number in the WAC group of the calling terminal to the called party call controller.

Preferably, the call initiated by the calling terminal to the calling party call controller in step a is: the calling terminal sends the short number in the WAC group of the called terminal to the calling of the calling party calling controller in the calling process.

Preferably, the step of the calling terminal sending the called terminal WAC group short number to the calling party call controller and the step of the calling party call controller initiating the call to the called party call controller further comprise:

the calling party call controller inquires the called terminal user number corresponding to the short number in the called terminal WAC group according to the short number in the called terminal WAC group and a preset user long-short number corresponding table, determines that the called terminal is a WAC group user according to the inquiry result, and acquires the short number in the calling terminal WAC group from the WAC information stored in advance.

Preferably, the step of the calling terminal sending the called terminal WAC group short number to the calling party call controller and the step of the calling party call controller initiating the call to the called party call controller further comprise:

the calling party call controller sends a query request message to the intelligent storage node according to the short number in the WAC group of the called terminal;

the intelligent storage node inquires the called terminal user number corresponding to the short number in the WAC group of the called terminal, then determines that the called terminal is a user in the WAC group according to the inquiry result, carries the called terminal user number in the inquiry result message and sends the inquiry result message to the calling party calling controller.

Preferably, the call initiated by the calling party call controller to the called party call controller follows the SIP protocol, and the call request message is an extended INVITE message.

Preferably, the expanded INVITE message is an INVITE message using a short number in the WAC group of the calling terminal as a header field parameter; or,

the expanded INVITE message is an INVITE message which takes a short number in a WAC group of the calling terminal as a header field; or,

the expanded INVITE message is an INVITE message which takes the short number in the WAC group of the calling terminal as a message body.

Preferably, if the extended INVITE message is an INVITE message with a short number in the WAC group of the calling terminal as a header field parameter, the header field is a From header field.

Preferably, the call initiated by the calling party call controller to the called party call controller follows the h.323 protocol, and the call request message is an extended Setup message.

Preferably, the extended Setup message is a Setup message in which a short number in the WAC group of the calling terminal is carried in a message subscriber information element H323-UU-PDU.

Preferably, the method for the called party call controller to send the WAC group internal short number of the calling terminal to the called terminal in step b is as follows:

the called party call controller determines that the calling terminal is a WAC group user according to the call request message from the calling party call controller, extracts the short number in the calling terminal WAC group in the call request message, and sends the call request message carrying the short number in the calling terminal WAC group to the called terminal.

Preferably, step c further comprises: and the called terminal displays the WAC group short number of the calling terminal.

Preferably, step c further comprises: and the called terminal acquires and displays the user information of the calling terminal.

Preferably, the manner of acquiring the user information of the calling terminal by the called terminal includes:

firstly, a calling party calling controller inquires WAC information stored in advance to obtain user information of a calling terminal, sends the user information of the calling terminal to a called party calling controller, and sends the user information of the calling terminal to a called terminal by the called party calling controller; or

In the second mode, the calling party call controller sends the WAC service information of the calling terminal to an intelligent storage node; the intelligent storage node inquires and obtains the user information of the calling terminal according to the WAC service information of the calling terminal and sends the user information to a calling party calling controller; the user information of the calling terminal is sent to a called party call controller, and the called party call controller sends the user information to a called terminal; or

Thirdly, the called party call controller sends the WAC service information of the calling terminal to an intelligent storage node; the intelligent storage node inquires and obtains the user information of the calling terminal according to the WAC service information of the calling terminal and sends the user information to a called party call controller; the called party call controller sends the information to a called terminal; or

The called terminal sends the WAC service information of the calling terminal to the intelligent storage node; and the intelligent storage node inquires and obtains the user information of the calling terminal according to the WAC service information of the calling terminal and sends the user information to the called terminal.

Preferably, the WAC service information of the calling terminal is a calling terminal user number;

or

The calling terminal WAC service information comprises a group number to which the calling terminal belongs and a short number in the calling terminal WAC group.

The invention also provides a system for realizing the wide area virtual user switch service, which comprises a calling terminal, a called terminal, a calling call controller and a called call controller;

the calling terminal is used for initiating a call to the calling party call controller;

the calling party controller forwards the call to the called party controller and sends the WAC cluster short number of the calling terminal to the called party call controller;

the called call controller is used for connecting the call to the called terminal and sending the WAC group short number of the calling terminal to the called terminal;

the called terminal is used for establishing a call with the calling terminal and carrying out communication.

Preferably, the calling party call controller presets a user long and short number corresponding table and WAC information;

the calling party call controller acquires the short number in the called terminal WAC group and the calling user number from the call, and inquires the user long-short number corresponding table by using the short number in the called terminal WAC group to acquire the called terminal user number; and inquiring and acquiring the short number in the WAC group of the calling terminal by using the calling subscriber number.

Preferably, the system further comprises an intelligent storage node for storing a user long and short number corresponding table;

the calling party call controller acquires the short number in the called terminal WAC group from the call, and requests the called terminal user number corresponding to the short number in the called terminal WAC group from the intelligent storage node by using the short number in the called terminal WAC group;

and the intelligent storage node returns the called terminal user number to the calling party calling controller.

The present invention also provides a call controller, comprising: a call receiving unit, a WAC processing unit and a call forwarding unit;

the call receiving unit is used for receiving a call initiated by a terminal;

the WAC processing unit is connected with the call receiving unit and used for acquiring a called terminal WAC group short number and a calling user number from the call and acquiring a called terminal user number by utilizing the called terminal WAC group short number; and using the calling subscriber number to inquire and obtain the short number in the calling terminal WAC group;

the call forwarding unit and the WAC processing unit are used for forwarding the call.

Preferably, the WAC processing unit includes a WAC information configuration unit and a WAC information query unit;

the WAC information configuration unit is used for configuring a user long and short number corresponding table and WAC information;

the WAC information query unit is connected with the WAC information configuration unit and is used for querying the user long and short number corresponding table according to the short number in the called terminal WAC group to acquire the called terminal user number; and inquiring and acquiring the short number in the WAC group of the calling terminal according to the number of the calling user.

Preferably, the WAC processing unit includes a WAC information request unit and a WAC information acquisition unit;

the WAC information request unit is used for requesting the called terminal user number corresponding to the short number in the called terminal WAC group from the intelligent storage node;

and the WAC information acquisition unit is used for acquiring the called terminal user number corresponding to the short number in the called terminal WAC group from the query result message returned by the intelligent storage node.

In summary, according to the method, the system and the call controller for implementing the WAC service provided by the present invention, since the calling party call controller can send the short number in the WAC group of the calling terminal to the called party call controller, and the called party call controller sends the short number in the WAC group of the calling terminal to the called terminal, the called terminal can display the short number in the WAC group of the calling terminal or the user information of the calling terminal, thereby achieving the effect of enhancing the user experience on the WAC service.

Drawings

Fig. 1 is a schematic diagram of a typical system architecture for implementing WAC services;

FIG. 2 is a schematic flow chart of a first embodiment of the present invention;

fig. 3 is a schematic message interaction flow diagram according to a first embodiment of the present invention;

FIG. 4 is a schematic flow chart of a second embodiment of the present invention;

fig. 5 is a schematic message interaction flow diagram according to a second embodiment of the present invention;

fig. 6 is a schematic diagram of the call controller structure of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In the invention, the call controller can be a switch or a soft switch; the terminal can be a Session Initiation Protocol (SIP) terminal, an MGCP terminal, an H.248 terminal and the like; and the interaction between the calling party call controller and the called party call controller may follow the SIP protocol or the h.323 protocol.

Fig. 2 shows a schematic flow chart of a first embodiment of the present invention. As shown in fig. 2, the method for implementing WAC service of the present invention includes the following steps:

step 201: the calling terminal initiates a call to the calling party call controller.

Step 202: the calling party calling controller initiates a call to the called party calling controller, and sends the short number in the calling terminal WAC group to the called party calling controller in the calling process.

Step 203: the called party call controller initiates a call to the called terminal and sends the WAC group short number of the calling terminal to the called terminal in the calling process.

Step 204: and the called terminal displays the WAC group user identification of the calling terminal and communicates with the calling terminal.

In order to more clearly illustrate the solution of the present invention, the method for implementing the WAC service is described in detail below. As shown in fig. 3, a schematic diagram of a message interaction flow in this embodiment is shown:

in this embodiment, the calling party call controller and the called party call controller are both soft switches, and use Session Initiation Protocol (SIP) for interaction, and the calling terminal and the called terminal are both SIP terminals.

In this embodiment, both the calling party call controller and the called party call controller store a subscriber long and short number mapping table and subscriber data. The user long and short number correspondence table records the correspondence between all terminal user numbers under the call controller and the short numbers in the WAC group, and the user data records the terminal user information, such as the user identification, the user name, the job, the age, the gender and other basic information.

The method for realizing the WAC service in the embodiment comprises the following steps:

step 301 to step 302: the calling terminal initiates a call to the calling party call controller, and sends an INVITE message carrying a WAC group short number of the called terminal to the calling party call controller in the calling process, and the calling party call controller returns a 100 response message to the calling terminal.

The calling terminal in this embodiment is an SIP terminal, and the WAC group internal short number of the called terminal may be sent to the calling party call controller through an INVITE message. In practical application, if the calling terminal is an MGCP terminal or an h.248 terminal, the calling terminal first sends an off-hook message to the calling party call controller after the user goes off-hook, and the short number dialed by the calling terminal user is used as the WAC group short number of the called terminal and sent to the calling party call controller.

Step 303: the calling party call controller inquires a user long-short number corresponding table according to the short number in the called terminal WAC group to obtain the called terminal user number corresponding to the short number in the called terminal WAC group; and after determining that the called terminal is a user in the WAC group according to the query result, querying and acquiring the short number in the WAC group of the calling terminal from WAC information stored in a calling controller of the calling party in advance.

In practical application, after a calling party call controller receives a call request message of a calling terminal, stored user data is inquired first, and after the calling terminal and a called terminal are determined not to belong to Centrex users under the same call controller according to the user data, a user long-short number corresponding table is inquired according to short numbers in a called terminal WAC group.

Step 304 to step 305: the calling party call controller initiates a call to the called party call controller, and in the calling process, an INVITE message carrying the extension of the short number in the WAC group of the calling terminal is sent to the called party call controller, and then the called party call controller returns a 100 response message to the calling party call controller.

In practical application, the calling party call controller initiates a call to the called party call controller by using the calling terminal user number and the called terminal user number through the NGN/PSTN network.

In practical applications, the extended INVITE message may be implemented in three ways:

(1) and expanding the header field parameter of the INVITE message, and taking the short number in the WAC group of the calling terminal as the INVITE message of the header field parameter. For example: and taking the short number in the WAC group of the calling terminal as a parameter in a From header field. An example of an extension is as follows: wherein "group ═ 30; name xxxx; wac, respectively; 8888 "provides information on a group number, a group name, and a short number, respectively.

·INVITE sip：7770000@182.20.50.200；user＝phone SIP/2.0

·Via：SIP/2.0/UDP 182.20.62.200：5061；branch＝z9hG4bK78cdff590

·Call-ID：a47c0b4e9264bf63a191bfa978cdff59@182.20.62.100

·From：xxxxx.com<sip：02077770002@182.20.62.100；user＝phone>；tag＝78cdff59；group＝30；name＝xxxx；wac；number＝8888

·To：xxx.com<sip：7770000@182.20.50.200；user＝phone>

·CSeq：1INVITE

·Contact：<sip：02077770002@182.20.62.200：5061；user＝phone>

·Supported：100rel

·Max-Forwards：70

The above example is to transmit three information of the group number, the group name, and the short number in the WAC group of the calling terminal to which the calling terminal belongs, or to extend only the group number to which the calling terminal belongs and the short number in the WAC group of the calling terminal into the FROM header field of the SIP protocol INVITE message, or to extend the group name to which the calling terminal belongs and the short number in the WAC group of the calling terminal into the FROM header field of the SIP protocol INVITE message.

(2) And expanding the header field of the INVITE message, and taking the short number in the WAC group of the calling terminal as a new header field. For example: adding a WacInfo header field for storing short numbers in the WAC group of the calling terminal.

(3) And expanding the message body of the INVITE message, and taking the short number in the WAC group of the calling terminal as a new message body. For example: and adding an application/WAC message body for storing short numbers in the WAC group of the calling terminal.

Step 306 to step 307: the called party call controller determines that the calling terminal is a WAC group user according to the expanded INVITE message, extracts the short number in the WAC group of the calling terminal in the call request message, sends the expanded INVITE message carrying the short number in the WAC group of the calling terminal to the called terminal, and the called terminal returns a 100 response message to the called party call controller.

Step 308: the called terminal displays the short number in the WAC group of the calling terminal and returns a 180 response message to the call controller of the called party.

Step 309: the called party call controller returns a 180 response message to the calling party call controller.

Step 310: the calling party call controller returns a 180 response message to the calling terminal.

Step 311: the calling terminal and the called terminal are communicated.

In practical application, the calling party call controller may also send other part of WAC information or all WAC information to the called party call controller. Thus, the called terminal can not only display the short number in the WAC group of the calling terminal, but also display the user information (such as the basic information of user identification, user name, job title, age, sex, etc.) of the calling terminal. Certainly, which WAC information of the calling terminal is sent to the called terminal can be determined by the user applying the present invention, and the implementation method is similar to this embodiment and will not be described herein again.

In the second embodiment of the present invention, the intelligent storage node is used to realize the centralized management of the number of the end user and the short number in the WAC group, and can support the CENTREX user with larger capacity. Specifically, the intelligent storage node stores a user long and short number correspondence table and user data. The user long and short number correspondence table records the correspondence between all terminal user numbers under the call controller and the short numbers in the WAC group, and the user data records the terminal user information, such as the user identification, the user name, the job, the age, the gender and other basic information. An example of data stored by an intelligent storage node is as follows:

the comparison table between the terminal user number and the short number in the WAC group is used for mutual check of the terminal user number and the short number information in the WAC group;

CENTREX group data storing group-related information, wherein the group-related information at least includes group number information and terminal information in the group;

user data: user identification or user profile, etc., for querying and displaying user information (such as user identification, user name, job title, age, gender, etc. basic information).

In this embodiment, CENTREX group data still needs to be configured in the calling party call controller and the called party call controller, so as to determine whether the terminal is a CENTREX user and query the intelligent storage node for related information, but short number data in the WAC group may not be configured, or a short number in the WAC group may be configured, and if a short number is configured, the local short number in the WAC group is used as a reference.

When a CENTREX user terminal initiates a call by using a called WAC group short number, if a calling party call controller cannot locally inquire an end user number corresponding to the WAC group short number, the calling party call controller needs to inquire on an intelligent storage node so as to obtain the called end user number to position a called user terminal. As shown in fig. 4, which is a flowchart of this embodiment, the method for implementing a WAC service in this embodiment includes the following steps:

step 401: the calling terminal initiates a call to the calling party call controller.

Step 402: the calling party call controller inquires the intelligent storage node to obtain the called terminal user number and the calling WAC group short number.

Step 403: the calling party call controller initiates a call to the called party call controller by using the called terminal user number, and sends the short number in the calling terminal WAC group to the called party call controller in the calling process.

Step 404: the called party call controller initiates a call to the called terminal and sends the WAC group short number of the calling terminal to the called terminal in the calling process.

Step 405: and the called terminal displays the WAC group user identification of the calling terminal and communicates with the calling terminal.

In order to more clearly illustrate the solution of the present invention, the method for implementing the WAC service is described in detail below. As shown in fig. 5, it is a schematic diagram of a message interaction flow in this embodiment:

in this embodiment, the calling party call controller and the called party call controller are both soft switches, and use Session Initiation Protocol (SIP) for interaction, and the calling terminal and the called terminal are both SIP terminals.

In this embodiment, the intelligent storage nodes respectively store a comparison table between the end user number and the short number in the WAC group, and other related user data. The comparison table records the corresponding relation between all terminal user numbers under the call controller and the short numbers in the WAC group, and the user data records the basic information of the terminal, such as user identification and the like. The method for realizing the WAC service in the embodiment comprises the following steps:

step 501 to step 502: the calling terminal initiates a call to the calling party call controller, and sends an INVITE message carrying a WAC group short number of the called terminal to the calling party call controller in the calling process, and the calling party call controller returns a 100 response message to the calling terminal.

The calling terminal in this embodiment is an SIP terminal, and the WAC group internal short number of the called terminal may be sent to the calling party call controller through an INVITE message. In practical application, if the calling terminal is an MGCP terminal or an h.248 terminal, the calling terminal first sends an off-hook message to the calling party call controller after the user goes off-hook, and the short number dialed by the calling terminal user is used as the WAC group short number of the called terminal and sent to the calling party call controller. Since the call initiated by the calling terminal to the calling party call controller is complicated and belongs to the prior art, it will not be described in detail here.

Step 503: after receiving the INVITE message sent by the calling terminal in step 501, the calling party call controller performs analysis processing, and sends a query request message to the intelligent storage node, wherein the query request message carries the user number of the calling terminal and the short number in the WAC group of the called terminal, so as to query the number attribute and the related information of the relevant calling party and the called party;

step 504: the intelligent storage node receives the query request message, queries the WAC group internal short number of the calling terminal and the called terminal user number according to the calling terminal user number and the called terminal WAC group internal short number carried in the message, and can further query the group number information, the group name information, the user name information and the like of the calling terminal and the called terminal; the intelligent storage node carries the inquired information with an inquiry result message and sends the inquiry result message to a calling party calling controller;

in practical application, in steps 503 to 504, after the calling party call controller receives the call request message of the calling terminal, the stored user data is first queried, and after it is determined that the calling terminal and the called terminal do not belong to a Centrex user under the same call controller according to the user data, the long and short number correspondence table of the user is queried from the intelligent storage node according to the short number in the WAC group of the called terminal.

Step 505 to step 506: the calling party call controller initiates a call to the called party call controller, and in the calling process, an INVITE message carrying the extension of the short number in the WAC group of the calling terminal is sent to the called party call controller, and then the called party call controller returns a 100 response message to the calling party call controller.

In practical application, the calling party call controller initiates a call to the called party call controller by using the calling terminal user number and the called terminal user number through the NGN/PSTN network. Since the process of implementing a call is complicated and belongs to the prior art, it is not described in detail here.

The extension of the SIP message structure, for example, three optional parameter fields are added in the FROM field of the INVITE message to carry the WAC group short number of the calling terminal, the group number and the group name information of the calling and called terminals are transmitted to the called party call controller, and the called party call controller obtains the group number of the called terminal after receiving the SIP message carrying the extension, and then compares the obtained group number with the group number of the calling group terminal sent by the calling party call controller to indicate the group call if equal, if not equal, the group call is not the group call, and the processing is performed according to the normal flow of the prior art. And when the call is judged to be the in-group call, displaying the short number of the calling terminal on the called terminal. The called terminal can be determined by two methods, namely obtaining the number by inquiring the intelligent storage node and inquiring the called terminal at the call controller of the called party.

In practical applications, the extended INVITE message may be implemented in three ways:

(1) and expanding the header field parameter of the INVITE message, and taking the short number in the WAC group of the calling terminal as the INVITE message of the header field parameter. For example: and taking the short number in the WAC group of the calling terminal as a parameter in a From header field. An example of an extension is as follows: wherein "group ═ 30; name xxxx; wac, respectively; 8888 "provides information on a group number, a group name, and a short number, respectively.

·INVITE sip：7770000@182.20.50.200；user＝phone SIP/2.0

·Via：SIP/2.0/UDP 182.20.62.200：5061；branch＝z9hG4bK78cdff590

·Call-ID：a47c0b4e9264bf63a191bfa978cdff59@182.20.62.100

·From：xxxxx.com<sip：02077770002@182.20.62.100；user＝phone>；tag＝78cdff59；group＝30；name＝xxxx；wac；number＝8888

·To：xxx.com<sip：7770000@182.20.50.200；user＝phone>

·CSeq：1INVITE

·Contact：<sip：02077770002@182.20.62.200：5061；user＝phone>

·Supported：100rel

·Max-Forwards：70

The above example is to transmit three information of the group number, the group name, and the short number in the WAC group of the calling terminal to which the calling terminal belongs, or to extend only the group number to which the calling terminal belongs and the short number in the WAC group of the calling terminal into the FROM header field of the SIP protocol INVITE message, or to extend the group name to which the calling terminal belongs and the short number in the WAC group of the calling terminal into the FROM header field of the SIP protocol INVITE message.

(2) And expanding the header field of the INVITE message, and taking the short number in the WAC group of the calling terminal as a new header field. For example: adding a WacInfo header field for storing short numbers in the WAC group of the calling terminal.

(3) And expanding the message body of the INVITE message, and taking the short number in the WAC group of the calling terminal as a new message body. For example: and adding an application/WAC message body for storing short numbers in the WAC group of the calling terminal.

Step 507 to step 508: the called party call controller determines that the calling terminal is a WAC group user according to the expanded INVITE message, extracts the short number in the WAC group of the calling terminal in the call request message, sends the expanded INVITE message carrying the short number in the WAC group of the calling terminal to the called terminal, and the called terminal returns a 100 response message to the called party call controller.

Step 509: the called terminal displays the short number in the WAC group of the calling terminal and returns a 180 response message to the call controller of the called party.

Step 510: the called party call controller returns a 180 response message to the calling party call controller.

Step 511: the calling party call controller returns a 180 response message to the calling terminal.

Step 512: the calling terminal and the called terminal are communicated.

In the 2 embodiments, the called terminal may further obtain and display the user information of the calling terminal.

The method for acquiring the user information of the calling terminal by the called terminal comprises the following steps:

firstly, a calling party calling controller inquires WAC information stored in advance to obtain user information of a calling terminal, sends the user information of the calling terminal to a called party calling controller, and sends the user information of the calling terminal to a called terminal by the called party calling controller; or

In the second mode, the calling party call controller sends the WAC service information of the calling terminal to an intelligent storage node; the intelligent storage node inquires and obtains the user information of the calling terminal according to the WAC service information of the calling terminal and sends the user information to a calling party calling controller; the user information of the calling terminal is sent to a called party calling controller, and the called party calling controller sends the user information to a called terminal; or

Thirdly, the called party call controller sends the WAC service information of the calling terminal to an intelligent storage node; the intelligent storage node inquires and obtains the user information of the calling terminal according to the WAC service information of the calling terminal and sends the user information to a called party call controller; the called party call controller sends the information to a called terminal; or

The called terminal sends the WAC service information of the calling terminal to the intelligent storage node; and the intelligent storage node inquires and obtains the user information of the calling terminal according to the WAC service information of the calling terminal and sends the user information to the called terminal.

The WAC service information of the calling terminal in the above manner may be a calling terminal user number;

or the combination of the group number of the calling terminal and the short number in the WAC group of the calling terminal.

In addition, in the embodiment, the interaction between the call controllers follows the SIP protocol, and in practical applications, the interaction between the call controllers may also follow the h.323 protocol. If the h.323 protocol is used, the messages in the call flow should be changed according to the h.323 protocol, for example: the INVITE message should become a Setup message; the 180 response message may be an Alerting message. In this case, the SETUP message needs to be extended, and the calling party call controller may send the SETUP message carrying the short number in the calling party WAC group to the called party call controller. A specific example of an extended Setup is as follows:

a non-standard capability is extended in the non-Standard data of the H323-UU-PDU to carry three information of a group number, a group name and a WAC group short number of a calling terminal, wherein the group number and the group name belong to the calling terminal, so as to be transmitted to a called party call controller. As shown below, a partial message example of the h.323 protocol Setup message nonStandardData is extended:

groupname＝xxxx；group＝20；numberlength＝4；number＝8888

nonStandardData.nonStandardIdentifier.h221NonStandard.t35CountryCode＝86

nonStandardData.nonStandardIdentifier.h221NonStandard.t35Extension＝02

nonStandardData.nonStandardIdentifier.h221NonStandard.manufacturerCode＝1000

in addition, in the above 2 embodiments, the calling controller and the called controller may be the same controller, and the signaling interaction between 2 persons will become internal processing.

The invention also provides a system for realizing the wide area virtual user switch service, which comprises a calling terminal, a called terminal, a calling call controller and a called call controller;

the calling terminal is used for initiating a call to a calling party calling controller;

the calling party controller forwards the call to a called party controller and sends the WAC cluster short number of the calling terminal to the called party call controller;

the called call controller is used for connecting the call to a called terminal and sending the WAC group short number of the calling terminal to the called terminal; the called terminal is used for establishing a call with the calling terminal and carrying out conversation.

The following is a specific way for realizing the wide area virtual private branch exchange service by using the system:

the first method is as follows: in the system, a user long and short number corresponding table and WAC information can be preset in a calling controller of a calling party; under the condition, the calling party calling controller acquires the short number and the calling user number in the called terminal WAC group from the calling, and acquires the called terminal user number by using the short number query user long-short number corresponding table in the called terminal WAC group; and inquiring and acquiring the short number in the WAC group of the calling terminal by using the number of the calling subscriber.

The second method comprises the following steps: the system can comprise an intelligent storage node for storing a user long and short number corresponding table; under the condition, the calling party call controller acquires the short number in the called terminal WAC group from the call, and requests the called terminal user number corresponding to the short number in the called terminal WAC group from the intelligent storage node by using the short number in the called terminal WAC group; the intelligent storage node returns the called terminal user number to the calling party calling controller.

The present invention also provides a call controller, as shown in fig. 6, including: a call receiving unit, a WAC processing unit and a call forwarding unit;

the call receiving unit is used for receiving a call initiated by a terminal;

the WAC processing unit is connected with the call receiving unit and used for acquiring a called terminal WAC group short number and a calling subscriber number from a call and acquiring the called terminal subscriber number by using the called terminal WAC group short number for inquiry; and inquiring and acquiring the short number in the WAC group of the calling terminal by using the number of the calling subscriber;

and the call forwarding unit and the WAC processing unit are used for forwarding the call received by the call receiving unit.

Wherein, the WAC processing unit in the controller may have the following 2 constituent structures:

the WAC processing unit can comprise a WAC information configuration unit and a WAC information query unit;

the WAC information configuration unit is used for configuring a user long and short number corresponding table and WAC information;

the WAC information query unit is connected with the WAC information configuration unit and used for querying the user long-short number corresponding table according to the short number in the called terminal WAC group to acquire the called terminal user number; and inquiring and acquiring the short number in the WAC group of the calling terminal according to the number of the calling user.

The WAC processing unit can comprise a WAC information request unit and a WAC information acquisition unit;

the WAC information request unit is used for requesting the called terminal user number corresponding to the short number in the called terminal WAC group from the intelligent storage node;

and the WAC information acquisition unit is used for acquiring the called terminal user number corresponding to the short number in the called terminal WAC group from the query result message returned by the intelligent storage node.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (21)

1. A method for realizing wide area virtual user exchanger service is characterized in that the method is as follows:

a. a calling terminal initiates a call to a calling party call controller, the calling party call controller initiates a call to a called party call controller, and a short number in a calling terminal wide area virtual subscriber switch (WAC) group is sent to the called party call controller in the calling process;

b. the called party call controller initiates a call to a called terminal and sends the WAC group short number of the calling terminal to the called terminal in the calling process;

c. the called terminal and the calling terminal establish a call to carry out conversation.

2. The method according to claim 1, wherein the method for the calling party call controller to send the calling terminal WAC group short number to the called party call controller in step a is as follows:

the calling party call controller sends a call request message carrying the short number in the WAC group of the calling terminal to the called party call controller.

3. The method according to claim 1, wherein the call initiated by the calling terminal to the calling party call controller in step a is: the calling terminal sends the short number in the WAC group of the called terminal to the calling of the calling party calling controller in the calling process.

4. The method of claim 2, wherein the step between the step of the calling terminal sending the WAC group short number of the called terminal to the calling party call controller and the step of the calling party call controller initiating the call to the called party call controller further comprises:

the calling party call controller inquires the called terminal user number corresponding to the short number in the called terminal WAC group according to the short number in the called terminal WAC group and a preset user long-short number corresponding table, determines that the called terminal is a WAC group user according to the inquiry result, and acquires the short number in the calling terminal WAC group from the WAC information stored in advance.

5. The method of claim 2, wherein the step between the step of the calling terminal sending the WAC group short number of the called terminal to the calling party call controller and the step of the calling party call controller initiating the call to the called party call controller further comprises:

the calling party call controller sends a query request message to the intelligent storage node according to the short number in the WAC group of the called terminal;

the intelligent storage node inquires the called terminal user number corresponding to the short number in the WAC group of the called terminal, then determines that the called terminal is a user in the WAC group according to the inquiry result, carries the called terminal user number in the inquiry result message and sends the inquiry result message to the calling party calling controller.

6. A method according to any of claims 2 to 5, wherein the call initiated by the calling party call controller to the called party call controller follows the SIP protocol, and wherein the call request message is an extended INVITE message.

7. The method according to claim 6, wherein said extended INVITE message is an INVITE message using a short number in the WAC group of the calling terminal as a header field parameter; or,

the expanded INVITE message is an INVITE message which takes a short number in a WAC group of the calling terminal as a header field; or,

the expanded INVITE message is an INVITE message which takes the short number in the WAC group of the calling terminal as a message body.

8. The method according to claim 7, wherein if said extended INVITE message is an INVITE message with a short number in the WAC group of the calling terminal as a header field parameter, said header field is a From header field.

9. The method according to any of claims 2 to 5, wherein the call initiated by the calling party call controller to the called party call controller complies with the H.323 protocol, and wherein the call request message is an extended Setup message.

10. The method according to claim 9, characterized in that said extended Setup message is a Setup message carrying a short number within the group of calling terminals WAC in a message subscriber information element H323-UU-PDU.

11. The method according to claim 1, wherein the method for the called party call controller to send the WAC group inner short number of the calling terminal to the called terminal in step b is as follows:

the called party call controller determines that the calling terminal is a WAC group user according to the call request message from the calling party call controller, extracts the short number in the calling terminal WAC group in the call request message, and sends the call request message carrying the short number in the calling terminal WAC group to the called terminal.

12. The method of claim 1, wherein step c further comprises: and the called terminal displays the WAC group short number of the calling terminal.

13. The method of claim 1, wherein step c further comprises: and the called terminal acquires and displays the user information of the calling terminal.

14. The method of claim 11, wherein the manner of acquiring the user information of the calling terminal by the called terminal comprises:

firstly, a calling party calling controller inquires WAC information stored in advance to obtain user information of a calling terminal, sends the user information of the calling terminal to a called party calling controller, and sends the user information of the calling terminal to a called terminal by the called party calling controller; or

In the second mode, the calling party call controller sends the WAC service information of the calling terminal to an intelligent storage node; the intelligent storage node inquires and obtains the user information of the calling terminal according to the WAC service information of the calling terminal and sends the user information to a calling party calling controller; the user information of the calling terminal is sent to a called party call controller, and the called party call controller sends the user information to a called terminal; or

Thirdly, the called party call controller sends the WAC service information of the calling terminal to an intelligent storage node; the intelligent storage node inquires and obtains the user information of the calling terminal according to the WAC service information of the calling terminal and sends the user information to a called party call controller; the called party call controller sends the information to a called terminal; or

The called terminal sends the WAC service information of the calling terminal to the intelligent storage node; and the intelligent storage node inquires and obtains the user information of the calling terminal according to the WAC service information of the calling terminal and sends the user information to the called terminal.

15. The method of claim 14, wherein the calling terminal WAC service information is a calling terminal subscriber number;

or

The calling terminal WAC service information comprises a group number to which the calling terminal belongs and a short number in the calling terminal WAC group.

16. A system for realizing wide area virtual user exchanger service is characterized in that the system comprises a calling terminal, a called terminal, a calling call controller and a called call controller;

the calling terminal is used for initiating a call to the calling party call controller;

the calling party controller forwards the call to the called party controller and sends the WAC cluster short number of the calling terminal to the called party call controller;

the called call controller is used for connecting the call to the called terminal and sending the WAC group short number of the calling terminal to the called terminal;

the called terminal is used for establishing a call with the calling terminal and carrying out communication.

17. The system of claim 16, wherein the calling party call controller presets a user long and short number correspondence table and WAC information;

the calling party call controller acquires the short number in the called terminal WAC group and the calling user number from the call, and inquires the user long-short number corresponding table by using the short number in the called terminal WAC group to acquire the called terminal user number; and inquiring and acquiring the short number in the WAC group of the calling terminal by using the calling subscriber number.

18. The system of claim 16, further comprising an intelligent storage node for storing a user long and short number correspondence table;

the calling party call controller acquires the short number in the called terminal WAC group from the call, and requests the called terminal user number corresponding to the short number in the called terminal WAC group from the intelligent storage node by using the short number in the called terminal WAC group;

and the intelligent storage node returns the called terminal user number to the calling party calling controller.

19. A call controller, characterized in that the call controller comprises: a call receiving unit, a WAC processing unit and a call forwarding unit;

the call receiving unit is used for receiving a call initiated by a terminal;

the WAC processing unit is connected with the call receiving unit and used for acquiring a called terminal WAC group short number and a calling user number from the call and acquiring a called terminal user number by utilizing the called terminal WAC group short number; and using the calling subscriber number to inquire and obtain the short number in the calling terminal WAC group;

the call forwarding unit and the WAC processing unit are used for forwarding the call.

20. The call controller according to claim 19, wherein said WAC processing unit comprises a WAC information configuration unit, a WAC information query unit;

the WAC information configuration unit is used for configuring a user long and short number corresponding table and WAC information;

the WAC information query unit is connected with the WAC information configuration unit and is used for querying the user long and short number corresponding table according to the short number in the called terminal WAC group to acquire the called terminal user number; and inquiring and acquiring the short number in the WAC group of the calling terminal according to the number of the calling user.

21. The call controller according to claim 19, wherein said WAC processing unit comprises a WAC information request unit, a WAC information acquisition unit;

the WAC information request unit is used for requesting the called terminal user number corresponding to the short number in the called terminal WAC group from the intelligent storage node;

and the WAC information acquisition unit is used for acquiring the called terminal user number corresponding to the short number in the called terminal WAC group from the query result message returned by the intelligent storage node.

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