WO2007115490A1

WO2007115490A1 - A method, system and device for implementing wide area centrex

Info

Publication number: WO2007115490A1
Application number: PCT/CN2007/001098
Authority: WO
Inventors: Dewen Zhang; Shengjun Xu
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-04-04
Filing date: 2007-04-04
Publication date: 2007-10-18
Also published as: CN1984355B; CN1984355A

Abstract

A method, system and device for implementing Wide Area Centrex are disclosed. The method comprises: routes the user's call to the switch device, the said switch device acquires the information of the user's number from the smart home location register, locates the called user and finishes the call. Since the mapping relationship between the user's long number and short number is centrally managed by the SHLR and the end office or the converging office triggering mode is used, the method and system solves the problem of the intercommunication between the WAC user's short number, provides a more convenient WAC management ability for the provider, and displays the short calling number when the calling number is displayed.

Description

Method, system and device for realizing wide-area centralized user switch

The present invention relates to the field of communications technologies, and in particular, to a method, system, and device for implementing a wide-area centralized user switch.

Background of the invention

The centralized subscriber exchange (Centrex) service divides some users into a Centrex group and provides them with rich business functions, such as internal short number interworking. The short number is a valid number in a Centrex group and is usually only allowed to be used in an exchange. If a Centrex group is composed of users of different exchanges, a wide-area Centrex (WAC, Wide Area Centrex) group is formed, which makes the users of the Centrex group have no geographical restrictions. Users of different exchanges and Centrex groups also hope that It can be exchanged with the Centrex short number to facilitate users such as offices, groups, factories and mines with scattered office locations.

At present, WAC generally has two implementation schemes: one is to convert the called short number into the called long number by configuring the number conversion data in each exchange, and realize the WAC user short number interworking function. This method requires a large amount of data to be set up in each exchange, and the data of each exchange is synchronized. The long and short numbers of the WAC users cannot be managed centrally, which is inconvenient for the operation and maintenance of the operators. In addition, this method can only display the calling long number when the caller ID is displayed, and the calling short number cannot be displayed. Another method is to implement the WAC through the intelligent service platform, that is, the exchange triggers the intelligent service, obtains the called long number according to the called short number at the service switching point (SSP), and then re-analyzes by number, and the positioning is call. This method requires an intelligent triggering capability in the end office. In reality, due to the complexity of the end office model, it is impossible to ensure that all end offices have intelligent triggering capabilities. Summary of the invention

Embodiments of the present invention provide a method, system, and device for implementing a wide area centralized user switch (WA (:, Wide Area Centrex), which provides a more convenient WAC management capability for an operator, and can display a main caller during caller ID display. Call the short number.

A system for implementing a Wide Area Centrex (WAC) service, including a switching device, further comprising: an intelligent home location register, and a communication connection with the switching device, where the smart home location register is configured The long and short number mapping relationship of the WAC user; the switching device acquires the calling short number and the called long number from the smart home location register by interacting with the smart home location register.

A method of implementing a WAC service, the method comprising:

The user's call is routed to the switching device, which obtains the subscriber number information from the intelligent home location register, locates the called subscriber, and completes the call.

A switching device for implementing a WAC service, which is in communication with a smart home location register, wherein the smart home location register is configured with a long and short number mapping relationship of the WAC user, and the switching device interacts with the smart home location register to obtain a smart home location register. Get the calling short number and the called long number.

The method, the system and the device for implementing the WAC provided by the embodiments of the present invention solve the short number intercommunication problem of the WAC user by centrally managing the long and short number mapping relationship of the user on the smart home location register, thereby providing the operator with more For convenient WAC management capabilities, the caller ID can be displayed at the same time as the caller ID.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a networking diagram of an end office mode according to an embodiment of the present invention;

2 is a networking diagram of a tandem office mode according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a process flow of a SHLR to a call service in a WAC group; 4 is a schematic diagram of a processing flow of the SHLR outbound call service of the WAC;

Figure 5 is a schematic diagram of the call flow in the WAC group of the local office in the end office mode;

Figure 6 is a schematic diagram of the call flow in the WAC group in the end office mode;

Figure 7 is a schematic diagram of the end office mode WAC outbound call flow;

Figure 8 is a schematic diagram of the flow of the WAC user at the end office of the tandem office in the tandem office.

Figure 9 is a schematic diagram of the outbound call flow of the WAC user at the end office of the tandem office in the tandem office mode;

Figure 10 is a schematic diagram of the flow of the WAC user at the end office of the WAC group outside the WAC group.

Mode for carrying out the invention

The present invention will be further described in detail below based on the accompanying drawings and embodiments:

In the embodiment of the present invention, the smart home location register (SHLR, Smart Home Location Register) is used to implement the WAC service, and the centralized management function of the user data by the SHLR is fully utilized, and the long and short number mapping relationship of the WAC user is saved on the SHLR; The called long number and the calling short number are obtained interactively, and then the number of the called long number is analyzed, and the called party is finally positioned, thereby realizing the short number interworking function of the WAC user, and the calling short number can be displayed at the same time.

The system for implementing the WAC service in the embodiment of the present invention includes: a switching device, a smart home location register, and a communication connection with the switching device, where the smart home location register is configured with a long and short number mapping relationship of the WAC user; The intelligent home location register interacts to obtain the calling short number and the called long number from the smart home location register.

On the group network, there are two ways for the exchange to access the SHLR: One is that the end office directly accesses the SHLR, which is called the end office mode. In this embodiment, the original end office is implemented by using a soft switch. As shown in FIG. 1, the method includes: a service control point 10, an application server 11, an intelligent home location register 12, a softswitch 13, an access gateway (AG, Access Gateway) 14, a SIP terminal 15 and Integrated Access Device (IAD) 16. SIP terminals, IAD terminals, and ordinary telephone terminals that are registered under the same softswitch can be used as users in the WAC group. In the end mode, the softswitch still retains the Centrex data, and a new WAC group type, that is, the SHLR mode WAC, needs to be added. In this way, the WAC user does not need to configure the short number data on the softswitch. Other data of the Centrex group, such as the out-of-group prefix, the short prefix and the length (the minimum length of the short prefix, the maximum length is consistent), the Centrex new business prefix remains.

Another networking mode is that all WAC calls are routed to the tandem office through the trunk gateway/signaling gateway (TG/SG, Transaction Gateway/Signaling Gatewa), and the SHLR is accessed by the tandem office. the way. In this embodiment, a soft switch is used to implement a traditional tandem office, as shown in FIG. The method includes: a service control point 20, an application server 21, a smart home location register 22, a softswitch 23, a TG/SG 24, and a PSTN end office 25 that accesses the softswitch 23 via the TG/SG 24. In the tandem office mode, the end office (C5 office) 25 does not need to configure Centrex data, and can be applied to occasions where the end office is inconvenient to modify. A new WAC group type, also known as SHLR mode WAC, is also required on the softswitch. In addition, the softswitch needs to set all WAC user data in the C5 office (but no short number is required), and the calling group number is identified and the WAC user is identified.

The processing flow of the SHLR service to the WAC includes two cases: the call service within the WAC group and the outbound call service of the WAC.

When the calling user dials the called short number to make a call within the WAC group, if the locally called party cannot find the called long number corresponding to the called short number, it is necessary to query the SHLR for the called long number corresponding to the called short number. When the calling party uses the calling long number to make a WAC outbound call, if the calling short number is not configured locally, the calling party should also be queried on the SHLR to query the calling short number corresponding to the calling long number, so that the calling short number is recorded in the bill. . In the processing procedure of the SHLR for the WAC service in the embodiment of the present invention, the softswitch is used as the switching device that interacts with the SHLR. In practical applications, the handover is performed. The replacement device can also be a PSTN switch or other switching device.

The call service in the WAC group is shown in Figure 3 and includes the following steps:

Step 301: The softswitch sends an SRI (Send Routing Info) message to the SHLRJ^, where the calling long code and the called short number are carried, and the service access code is inserted into the WAC group before the called short number.

Step 302: The SHLR identifies the call service in the WAC group according to the service access code in the WAC group, obtains the calling short number and the group number according to the calling number, and obtains the called party according to the group number and the called short number. number;

Step 303: The SHLR carries the calling short number and the obtained called long number in the SRI_ACK message and returns to the softswitch.

The WAC outbound call service is shown in Figure 4 and includes the following steps:

Step 401: The softswitch sends an SRI message to the SHLR. Since the type of the Centrex group to which the WAC user belongs is the SHLR mode, and the calling party short number is not configured locally, the softswitch sends an SRI message to the SHLR. Call the short number. The SRI message carries the calling number and the called number of the WAC outbound call service access code. In step 402, the SHLR identifies the WAC outbound call service according to the WAC outbound call service access code. , Find the calling short number corresponding to the calling number.

Step 403: The SHLR returns an SRI_ACK message to the softswitch, where the queried caller's short number and the called number of the WAC outbound service access code are deleted.

The method of the present invention will be further described below with reference to specific embodiments for both the end office and the tandem office.

In the end office mode, the flow of the call in the WAC group of the local office is as shown in FIG. 5, and includes the following steps: Step 501: The WAC user A dials the short number to call the WAC user B in the group;

Step 502: The softswitch sends an SRI message carrying the calling short number and the called short number of the calling service access code in the WAC group to the SHLR. Step 503: The SHLR returns the calling short number and the called long number to the softswitch. Step 504: The softswitch determines, according to the called long number, that the called number is the local number, locates the called party, and initiates a call, and the calling message carries the main message. Called the trombone, group number and calling short number;

In step 505, the called party determines that the call is in the group, and the calling number is displayed as a short number.

In the end mode, the process of outgoing calls in the WAC group is as shown in FIG. 6, and includes the following steps: Step 601: The local WAC user A dials the short number to call the WAC user B in the group of another exchange;

Step 602: The softswitch sends an SRI message carrying the calling short number and the called short number of the call service access code in the WAC group to the SHLR.

Step 603, the SHLR returns the calling short number and the called long number to the soft exchange;

Step 604: The softswitch determines that the call is an outgoing call according to the called long number, and initiates an outgoing call by using an ISUB (International Services Digital Network User Part/ISDN User Part) protocol, except for the calling number and the called party. Outside the number, the extended ISUP uses the universal number unit to carry the calling short number (current ISUP extension without the group number);

Step 605: If the softswitch of the WAC user B supports the same extension of the ISUP protocol, the calling number is displayed as a short number. Otherwise, the calling number is displayed as a long number (can be displayed as a group prefix + long number).

In the end mode, the flow of the WAC outbound call is as shown in FIG. 7, and includes the following steps: Step 701: The WAC user A dials the group prefix + the called number calls the WAC user B of another group;

Step 702: The softswitch recognizes that the call is an outbound call according to the outgoing group prefix, and sends an SRI message carrying the calling number and the called number with a special prefix (without the group prefix) to the SHLR. ;

Step 703: The SHLR returns the calling short number and the called number to the softswitch.

Step 704: The softswitch initiates a call to the called party, and carries the calling long number and the calling short number. In the tandem office mode, the CAC user of the C5 office calls the WAC user flow in other C5 office groups as shown in Figure 8. The following steps are included:

Step 801: The CA5 user of the C5 office dials the short number to call the WAC user in the other C5 office group. The call is routed to the softswitch through the IAM/SAM/ACM message, and the softswitch performs the screening of the incoming caller number according to the calling number. Judging that the calling party is a WAC user, and determining the length of the calling short number according to the first short number;

Step 802, the softswitch collects the short message number of the calling party, returns an address full message (ACM) to the C5 office, and sends an SRI message carrying the short number of the calling party and the called short number to the SHLR;

Step 803: The SHLR returns an SRI-ACK message to the softswitch, where the calling short number is carried, and the called long number is sent;

Step 804: The softswitch determines that the called party is another C5 intra-office user according to the called long number, sends an IAM message to the opposite office, and initiates a call to the user, and uses the extended ISUP protocol to carry the calling long number and the calling short when outgoing. If the extended ISUP protocol is not supported during the outgoing call, the softswitch may send the calling short number as the calling number to the called end office according to the data configuration, or send the calling long number as the calling number to the called party. End office.

Step 805: The called C5 office displays the long or short number of the calling party according to the calling number sent by the softswitch.

In the tandem office mode, the process of the outbound call of the CAC user in the C5 office is as shown in Figure 9, which includes the following steps:

Step 901, the C5 office WAC user dials the group prefix + the called number calls other C5 office WAC users, and the call is routed to the softswitch through the IAM/SAM message;

Step 902: The softswitch identifies the calling party as a WAC user by identifying the calling number, and identifies that the call is an outbound call, and sends the calling long number to the SHLR^_, and the WAC outbound call service access is inserted in front. The SRI message of the called number of the code, query the calling short number.

Step 903: The SHLR returns an SRI_ACK message to the softswitch, where the calling short number is carried. And called number;

Step 904: After the softswitch deletes the out-of-group prefix before the called number, the call is analyzed as the outgoing call, and the call is initiated to the called C5 office by using the IAM message, where the calling long number and the calling short number are carried.

In the tandem office mode, the process of the out-of-band WAC user calling in the C5 office WAC user is shown in Figure 10, including the following steps:

Step 1001: The softswitch receives a call that is inbound to the C5 office outside the WAC group.

Since all calls of the C5 office are routed to the softswitch, the C5 office does not have an independent route. The call from the office to the C5 office passes the softswitch. Therefore, the call from the outside of the WAC group to the C5 office is first routed to the softswitch through the IAM/SAM message.

Step 1002: After inserting a special prefix in front of the calling number, the softswitch queries the SHLR for the calling short number;

Step 1003: The SHLR returns a calling short number to the softswitch.

Step 1004: The softswitch determines that the called party is a C5 office WAC user, and the called party is different from the calling party, and the softswitch carries the IAM message for sending the calling number to the C5 office according to the WAC data configuration, or the calling number is The outgoing prefix of the called Centrex group is used as the calling number.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection.

Claims

Claim

A system for implementing a Wide Area Centrex (WAC) service, including a switching device, further comprising: an intelligent home location register, and a communication connection with the switching device, the smart home location register The long and short number mapping relationship of the WAC user is configured; the switching device acquires the calling short number and the called long number from the smart home location register by interacting with the smart home location register.

2. The system of claim 1 wherein the switching device is an end office.

The system according to claim 1, wherein the switching device is a tandem office, the system further comprising: an end office, the end office accessing the tandem through a trunk gateway/signaling gateway Bureau.

4. A method for implementing a Wide Area Centrex (WAC) service, the method comprising:

5. The method according to claim 4, characterized in that the long and short number mapping relationship of the user is saved in advance on the smart home location register.

The method according to claim 5, wherein the process of obtaining the user number information from the smart home location register by the switching device comprises the following steps:

The switching device sends a routing information message to the smart home location register, and the smart home location register queries the user number information according to the routing information message;

The intelligent home location register returns a routing information reply message carrying the queried subscriber number information to the switching device.

The method according to claim 6, wherein the WAC service is a call service within the WAC group, and the routing information message sent by the switching device carries the called short number. The acquired user number information is a called long number.

The method according to claim 7, wherein the sending routing information message further carries a calling long number, and the called short number is pre-inserted with a call service access code in the WAC group, and the smart home location The process by which the register obtains the called trombone includes:

The intelligent home location register determines that the call service in the WAC group is based on the call service access code inserted in the WAC group before the called short number, obtains the calling short number and the group number according to the calling long number, and according to the group number and The called short number gets the corresponding called long number.

The method according to claim 7, wherein the WAC service is a WAC outbound call service, and the routing information message sent by the softswitch carries a calling long number, and the obtained user number information Called the short number.

The method according to claim 9, wherein the sending routing information message further carries a called number, and the called number is pre-inserted with a WAC outbound call service access code, and the intelligent home location register is obtained. The process of the corresponding calling short number includes:

The intelligent home location register determines that the WAC outbound call service is based on the WAC outbound call service access code inserted before the called number, and searches for the corresponding calling short number according to the calling number.

A switching device for implementing a Wide Area Centrex (WAC) service, wherein: the switching device is in communication with a smart home location register, and the length of the WAC user is configured on the smart home location register. No. mapping relationship; the switching device acquires the calling short number and the called long number from the smart home location register by interacting with the smart home location register.

12. Switching device according to claim 11, characterized in that the switching device is implemented by a softswitch.

13. The switching device according to claim 11, wherein: said switching device is equipped with Centrex group data.