WO2008083602A1

WO2008083602A1 - Call route selecting method, system, device and emergency call process system

Info

Publication number: WO2008083602A1
Application number: PCT/CN2007/071385
Authority: WO
Inventors: Yong Lin
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-12-30
Filing date: 2007-12-29
Publication date: 2008-07-17

Abstract

A call route selecting method is disclosed, which includes the following steps: the route selecting condition of the call information of the calling user is obtained, the route selecting condition at least includes IP address of the calling party; based on the obtained route selecting condition, the call route corresponding to the obtained route selecting condition which at least includes IP address information of the calling party is searched and confirmed. A switch device, location server, network system and emergency call process system are also provided in present invention.

Description

Call routing method, system, device and emergency call processing system

This application is required to be submitted to the Chinese Patent Office on December 30, 2006 and January 16, 2007. The application numbers are 200610132461.X, 200710000261.3, respectively. The invention names are "Network System and Call Routing Method" and "Emergency Call". The processing method and system and the priority of a Chinese patent application for a soft exchange are hereby incorporated by reference in its entirety.

Technical field

The present invention relates to the field of communications, and more particularly to a call routing method, system, device, and emergency call processing system.

Background technique

Next Generation Network (NGN) is a service-driven network that adopts a comprehensive, open, and converged network architecture. It separates services from call control, and separates call control from service bearers, making services independent of the network. To achieve a relatively independent business system.

With the development of NGN networks, the configuration and maintenance of routing information in NGN networks has become the key to the development of NGN networks. To this end, the industry has proposed a hierarchical softswitch routing system solution and location server positioning scheme, in which hierarchical routing The system solution adopts a routing mechanism similar to the traditional Public Switched Telephone Network (PSTN), which adopts multi-level routing; and the location server positioning scheme uses a location server to provide routing services for one or a group of softswitches. When the NGN network grows to a larger scale and the number of softswitches is larger, the location server can provide a relatively more efficient routing service.

Currently, flexible call routing functions are available in both softswitch and location servers, such as different call sources (such as calling number information) and different calling types (normal, priority, data, attendant). , test), different time periods, different called user numbers, bearer service types, etc. select different routes.

However, in the softswitch-controlled NGN network, the network adopts an IP (Internet Protocol)-based architecture. The above routing scheme adopts a call routing mechanism similar to PSTN, and cannot implement IP address-based call routing.

In particular, emergency call routing based on IP addresses cannot be implemented. Since softswitch is based on IP network and has the characteristics of cross-domain networking, if there is a soft terminal or an IP phone, in the deep The number of Shenzhen Fang may roam to Shanghai due to business trips. At this time, the network is registered to the softswitch through Shanghai. If the emergency number is dialed, it should be connected to the emergency center in Shanghai. It should not be connected to the emergency center in Shenzhen; The local network call also has this problem. For example, the user in the Shenzhen A area is nomadic to the B area. At this time, the emergency call needs to be connected to the B area instead of the A area. The so-called nomadic, that is, the user moves from one area to another; common emergency calls include 110, 119, 120, 122, and so on.

In the IMS (IP Mul t imedia Subsystem, IP Multimedia Subsystem) phase, the above problem is solved by the HSS (Home Subscr iber Server). However, in the NGN network, there is no related solution in the prior art. .

The emergency center can access the softswitch through the relay, or access the softswitch through the subscriber line. If the subscriber line accesses the softswitch, it is the telephone of the local office, not the outgoing one, and does not involve the routing. The problem, but this situation can't be connected using existing routing technology.

Therefore, there is a need for an emergency call solution to address the emergency call routing problem of nomadic users in the related art described above.

Thus, the inventors have found that the disadvantages of the prior art are: In the NGN network controlled by the softswitch, the IP address-based call routing cannot be implemented; in particular, the routing problem of the nomadic user emergency call cannot be realized.

Summary of the invention

The technical problem to be solved by the embodiments of the present invention is to provide a call routing method, system, device and emergency call processing system to solve the problem of call routing based on IP address information.

An embodiment of the present invention provides a call routing method, where the method includes:

Obtaining a routing condition that includes at least a calling party IP address in the calling user call information; and determining, according to the obtained routing condition query, a call route corresponding to the acquired routing condition including at least the calling party IP address information.

The embodiment of the present invention further provides a switching device, including a call routing processing unit, where the call routing processing unit includes:

a storage unit, configured to store a correspondence between a routing condition including at least a calling party IP address information and a call route;

The calling party IP address information obtaining unit is configured to obtain a routing condition that the calling party call information includes at least the calling party IP address information; The route determining unit is configured to query the corresponding relationship stored in the storage unit according to the acquired routing condition to determine a corresponding call route.

The embodiment of the invention further provides a location server, including:

The route determining unit is configured to receive a routing condition including at least the calling party IP address information, and query the corresponding relationship stored in the storage unit according to the routing condition to determine and feed back the corresponding call route.

In addition, the embodiment of the present invention further provides a switching device, including a call routing processing unit, where the call routing processing unit includes:

The calling party IP address information obtaining unit is configured to obtain a routing condition of the calling party call information including at least the calling party IP address information;

The call routing query unit is configured to query the location server for the corresponding call route according to the routing selection condition including the at least the calling party IP address information.

The embodiment of the present invention further provides a network system, including: a location server and a switching device, where the switching device is integrated with a call routing processing unit, where

The call routing processing unit includes:

a call routing query unit, configured to query the location server for a corresponding call route according to the routing selection condition including at least the calling party IP address information;

The location server is configured to store a correspondence between a routing condition including at least a calling party's IP address information and a call route, and return a corresponding call route when receiving a call routing query request sent by the call routing query unit.

An embodiment of the present invention further provides an emergency call processing system, including:

a registration device, configured to instruct the user equipment to log in to the remote place and register the softswitch to the home location through the remote IP network;

Softswitch, which includes: An IP address obtaining module, configured to acquire an IP address of the user equipment from the message of the call when the user equipment initiates the call;

An emergency center selection module, configured to analyze when the called number of the call indication is an emergency number, according to

IP address selection emergency center;

And a connection module for connecting the call to the emergency center.

It can be seen from the above technical solutions that the following technical effects can be achieved in the embodiments of the present invention:

According to an embodiment of the present invention, a correspondence between a routing condition including at least a calling party IP address information and a call route is stored in a switching device or a location server; and the calling user call information is resolved by the switching device to obtain at least a calling party. a routing condition of the IP address information; the switching device then queries the corresponding relationship stored by the switching device or the location server according to the obtained routing condition including at least the calling party IP address information to determine a corresponding call route, thereby Implementing call routing based on IP address information in an IP-based network can further improve routing flexibility and meet the requirements of efficient NGN routing.

In particular, in the case of an emergency call, the switching device determines whether the calling party is a nomadic user, where the nomadic is, and determines whether it is an emergency call by analyzing the IP address of the calling party and analyzing the called number, and thereby selecting an emergency call. And which emergency center should be routed to the nomadic address for proper connection. In this way, the user can make the call emergency number connect to the nearest emergency center in the case of nomadic, thereby ensuring that the user's emergency situation is processed in time.

Other features and advantages of the embodiments of the invention will be set forth in the description in the description. The objectives and other advantages of the invention will be realized and attained by the <RTI

DRAWINGS

The drawings are intended to provide a further understanding of the present invention, and are intended to be illustrative of the invention, and are not intended to limit the invention. In the drawing:

1 is a schematic structural diagram of a system of a first preferred embodiment of a network system according to the present invention;

2 is a schematic diagram showing the composition of a preferred embodiment of a call routing processing unit of a switching device in the network system shown in FIG. 1; 3 is a schematic structural diagram of a system of a second preferred embodiment of the network system of the present invention;

4 is a schematic diagram of a preferred embodiment of a location server in the network system shown in FIG. 3. FIG. 5 is a schematic flowchart of a first preferred embodiment of a call routing method according to the present invention;

6 is a schematic flow chart of a second preferred embodiment of the call routing method of the present invention;

FIG. 7 is a flow chart showing an emergency call processing method according to an embodiment of the present invention; FIG.

Figure 8 shows a block diagram of a softswitch system in accordance with an embodiment of the present invention;

FIG. 9 is a schematic diagram showing an emergency call of a nomadic user according to an embodiment of the present invention; FIG.

Fig. 10 is a flow chart showing the emergency call processing method of the nomadic user according to Fig. 9.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.

Please refer to FIG. 1, which is a schematic structural diagram of a system of a first preferred embodiment of the network system of the present invention. The network system in this embodiment includes a primary/called user, an access gateway, a relay gateway, and a switching device. The primary/called user may use a SIP terminal that directly accesses the switching device, or may use other interfaces. A terminal that accesses the switching device of the gateway, such as a PSTN telephone terminal, or a telephone terminal that accesses the switching device through the PSTN switch, is not described here.

The switching device is used as a call control device, and the selection of the call routing directly affects the quality of the call. In this embodiment, the switching device implements interworking with multiple PSTN switches of the next hop through the relay gateway. In this embodiment, the correspondence between the routing condition including the calling party IP address information and the call routing is pre-configured and stored in the switching device, where the calling party IP address information may be the calling party access gateway. The address information may also be the address information of the calling party relay gateway, or the address information of the calling terminal device, or other IP address information that can identify the calling party, and details are not described herein.

In addition, the switching device may also adopt a correspondence between a routing condition of the calling party IP address information supporting the IP address matching and the call routing, for example, the calling party IP address is 10.11.xx.xx, and the exchange is performed. The device can support call routing corresponding to any IP address starting with 10.11.

After the switching device receives the calling user call information, the switching device parses the calling user information to obtain a routing condition including at least the calling IP address information, according to the routing condition including at least the calling party IP address information. Querying the pre-configured and stored correspondence relationship between the routing condition including the calling party IP address information and the call routing can determine the corresponding call route. It should be noted that, in order to implement IP address-based call routing, the routing conditions obtained in this embodiment include at least the IP address of the calling party, and the routing condition may further include: Source, calling user category, calling time period, called user number, bearer service type, and/or emergency number correspondence table (ie, call source, calling user category, calling time period, called subscriber number, bearer service type, and emergency) At least one of the numbers corresponding to the table), etc., will not be described here.

Referring to FIG. 2, the related functional unit for implementing call routing based on IP address information in the switching device in this embodiment mainly includes a call routing processing unit, and the call in this embodiment is used to implement IP address-based call routing. The routing processing unit mainly includes: a storage unit 101, a calling party IP address information acquiring unit 102, and a routing determining unit 103, wherein

The storage unit 101 is configured to store a correspondence between a routing condition including at least a calling party's IP address information and a call route.

Referring to the foregoing description, in the specific implementation, the routing condition described in this embodiment includes at least the calling party IP address information, and may also be combined according to actual needs: call source, calling user category, calling time period, and called user. A combination of any one or more of the optional routing conditions, such as the number (or called user number prefix) and the bearer type of service (here, by way of example only, other bound routing conditions are not limited), for example, In a preferred embodiment, the routing condition is a calling party

The IP address information is combined with the called user number prefix information, and the correspondence between the routing condition including the calling party IP address information and the call routing stored by the storage unit 101 is as shown in Table 1: Table 1

The IP address of the calling party is 10.11.12.12 and the called user number prefix of the 6540 corresponds to the call route 1, and the IP address of the calling party is 10.11.12.13 combined with the called user number prefix of the 6540.

^Route 2.

The calling party IP address information obtaining unit 102, the calling party IP address information acquiring unit 102 The method is mainly used for parsing call information of a calling party to obtain a routing condition including at least the IP address information of the calling party. Referring to the foregoing description, in order to implement call routing based on the IP address of the calling party, when the call information of the calling party is parsed, at least The IP address information of the calling party needs to be parsed. In addition, other routing condition information combined with the IP address information of the calling party may be parsed, and details are not described herein.

The route determining unit 103 determines the corresponding call route mainly according to the acquired correspondence relationship stored by the routing condition query storage unit 101 that includes at least the calling party IP address information.

For example, taking the correspondence between the foregoing Table 1 as an example, when the calling party IP address of the calling party IP address is 10.11.12.12 and the calling party B whose calling party IP address is 10.11.12.13 dials the called user number prefix. The called user of the 6540, the switching device will select a different route (in this embodiment, the switching device will select the call route 1 and the call route 2 for the calling user A and the calling user B respectively).

In addition, as shown in FIG. 2, as a preferred implementation, the route determining unit 103 of this embodiment may include:

The query processing unit 1031, the query processing unit 1031 is configured to query the corresponding relationship stored by the routing condition query storage unit 101 according to the obtained routing condition including at least the calling party IP address information, and determine whether the presence and the acquired at least the calling party are included. The routing route matching the routing condition of the party IP address information, and sending the matching judgment result;

The routing unit 1032 is configured to: when the query processing unit 1031 receives the call route that matches the acquired routing condition including at least the calling party IP address, A call route matching at least the routing condition of the calling party IP address is selected as the selected call route, and the call route is fed back.

Preferably, after the user is nomadic to an off-site emergency call, and the home network is registered by the remote IP network, the switching device further includes:

The emergency center selection module is configured to select an emergency center according to a routing condition including at least a calling party's IP address information when determining that the user-initiated call is an emergency call.

At this time, the emergency unit correspondence table is also stored in the storage unit, wherein the emergency number correspondence table includes the called emergency prefix field. As shown in Table 2, of course, Tables 1 and 2 can also be combined into one table to save.

Table II

IP address is called emergency prefix emergency routing prefix 10. 11. 12. 12 110 0755110

10. 15. 11. 13 110 020110

10. 15. 13. 13 110 2897110

10. The emergency center selection module includes: an emergency call determination unit and an emergency center selection unit, wherein the emergency call determination unit is configured to determine whether the called number of the call corresponds to a storage a record of the called emergency prefix field stored in the emergency number correspondence table in the unit, if yes, determining that the call is an emergency call, the called number is an emergency number; and the emergency center selecting unit is configured to The routing condition including the calling party IP address information selects the corresponding emergency center.

Preferably, the emergency center selection module further includes: a query unit, configured to query the emergency number correspondence table in the storage unit, to obtain an emergency route prefix in the emergency number correspondence table corresponding to the IP address and the emergency number And instructing the emergency center selection unit to select a corresponding emergency center according to the emergency routing prefix.

It should be noted that the functions and functions of the preferred partial units in this embodiment are described in detail in the functions and functions of the corresponding devices, and are not described herein.

Referring to FIG. 3, the figure is a schematic structural diagram of a system of a second preferred embodiment of the network system of the present invention. The network system in this embodiment mainly includes a primary/called user, an access gateway, a relay gateway, a location server, and a switching device. The same as the first embodiment, the primary/called user can directly access. The session initial protocol terminal (ie, the SIP terminal) of the switching device may also use other terminals that access the switching device through the access gateway, such as a PSTN telephone terminal, or a PSTN switch to access the telephone terminal of the switching device, and details are not described herein again.

In order to implement the call routing based on the IP address information, in the embodiment, the correspondence between the routing condition including the calling party IP address information and the call routing is pre-configured and stored in the location server, and the foregoing description is as follows. The calling party IP address information may also be the calling party access gateway address information, the calling party relay gateway address information, or the calling terminal device address information, and the location server may also adopt support. The correspondence between the routing conditions of the calling party's IP address information and the call routing of the IP address wildcard is not mentioned here.

After the switching device receives the calling user call information, the switching device parses the calling user information. Obtaining a routing condition including at least the calling party IP address information; the switching device queries the location server for a corresponding call route according to the acquired routing condition including at least the calling party IP address information; The routing condition query including at least the calling party IP address information pre-stored a correspondence relationship between the routing condition including the calling party IP address information and the call routing to determine a corresponding call route, such as the call routing 1 in the figure. The call routing 2, the call routing 3, and the call routing 4 are only used as an example. The actual application is not limited thereto, and the determined call routing information is returned to the switching device.

It is to be noted that the routing of the call based on the IP address information is the same as that in the first embodiment. The routing conditions obtained in this embodiment include at least the IP address of the calling party, and the routing is further required according to actual service requirements. The selection conditions may further include: a call source, a calling user category, a calling time period, a called user number, a bearer service type, and/or an emergency number correspondence table (ie, a call source, a calling user category, a calling time period, and a called user) The number, the bearer service type, and at least one of the emergency number correspondence tables, etc., are not mentioned here.

Referring to FIG. 4, which is a schematic diagram of a preferred embodiment of a switching device and a location server in a network system according to the present invention, wherein the location server is configured to store routing conditions and call routing including at least calling party IP address information. Corresponding relationship, and returning the corresponding call route when receiving the call routing query request sent by the call routing query unit, which mainly includes: a storage unit 201 and a route determining unit 202, where

The storage unit 201 is configured to store a correspondence between a routing condition including at least the calling party IP address information and a call route.

Similarly, referring to the foregoing description, the routing condition described in this embodiment includes at least the calling party IP address information, and may also be combined according to actual needs: call source, calling user category, calling time period, and called user number. And/or bear the type of business and other information, no longer mentioned here.

The route determining unit 202 is configured to receive a routing condition including at least the calling party IP address information, and query the corresponding relationship stored in the storage unit 201 according to the routing condition to determine and feed back Corresponding call routing.

In this embodiment, the route determining unit 202 may include:

The query processing unit 2021 is configured to receive a routing condition including at least the calling party IP address information, and query the correspondence relationship stored by the storage unit according to the routing condition to determine whether the The routing route matching at least the routing condition of the calling party IP address is matched, and the matching judgment result is sent;

The routing unit 2022, when receiving the query processing unit 2021 to send a call route that matches the routing condition including the at least the calling party IP address information, the routing condition including the at least the calling party IP address The matched call route serves as the selected call route and feeds back the call route.

The above-mentioned location server mainly implements call routing query in the network system. Correspondingly, for the switching device including the call routing processing unit, the call routing processing unit of the switching device in this embodiment is configured to: obtain the calling party IP address information. The unit 211 and the call routing query unit 212, wherein the calling party IP address information obtaining unit 211 is configured to parse the calling party call information to obtain at least the calling party IP address information. Routing condition

The call routing query unit 212 is configured to query the location server for a corresponding call route according to the routing condition including at least the calling party IP address information.

The flow of the first preferred embodiment of the method for implementing call routing according to the present invention is described below with reference to FIG. 1 and FIG. 5, which mainly includes the following steps:

Step s31: The switching device parses the calling user call information to obtain a routing condition including at least the calling party IP address information.

In a specific implementation, if the calling user is a SIP terminal, the IP address information of the calling party may be an IP address of the SIP terminal, and if the calling user is a PSTN terminal that accesses the switching device through the access gateway, The IP address information of the calling party may be the IP address of the access gateway.

Step s32: The switching device queries, according to the acquired routing condition, a corresponding call route that determines the correspondence between the routing condition including the calling party IP address information and the call route.

The flow of the second preferred embodiment of the method for implementing call routing according to the present invention is described below with reference to FIG. 3 and FIG. 6, which mainly includes the following steps:

Step s41: The switching device parses the calling user call information to obtain a routing condition including at least the calling party IP address information. Step s42: The switching device queries the location server for the corresponding call route by using the routing condition that includes at least the calling party IP address information.

Step s43: The location server determines, according to the obtained routing condition including at least the calling party IP address information, a pre-stored correspondence between the routing condition including the calling party IP address information and the call routing to determine a corresponding call route;

Step _S 44, the location server returns the call to the determined routing information of the switching device.

In summary, in the call routing, only the routing condition including the calling party IP address carried in the call information of the calling user needs to be parsed; and then the routing information including at least the calling party IP address information is obtained according to the obtained routing information. The condition may query to determine a call route corresponding to the acquired routing condition including at least the calling party IP address information, and further, if there is no call matching the routing condition including the calling party IP address When routing or the matching call routing is not available, etc., call routing may also be performed according to other methods, that is, the above-mentioned route determining unit and its corresponding constituent functional units performing routing, and the location server and its execution routing. Corresponding to the functional unit, in the case of a call routing method that does not match the routing condition including at least the IP address information of the calling party, other routing technologies may also be used, which are not mentioned here.

In particular, the embodiment of call routing described above is equally applicable to call routing in the case of nomadic users in an emergency call.

The third embodiment of the present invention provides an emergency call processing method. In this embodiment, the switching device is used as a soft switch as an example. As shown in FIG. 7, the following steps are included:

Step S51: After the user equipment is nomadic to the remote place, the softswitch is registered to the home place through the remote IP network (that is, the area to which the user equipment is not pastoralized);

Step S52, when the user equipment initiates a call, the softswitch obtains the IP address of the user equipment from the message of the call;

Step S53: The softswitch analyzes that the called number of the call is an emergency number, and selects an emergency center according to the IP address;

In step S54, the softswitch connects the call to the emergency center.

In the above emergency call processing method, since the softswitch acquires the IP address of the user equipment, the address segment to which the user belongs can be detected based on the IP address, thereby detecting the current location of the nomadic user. By analyzing the called number, it is also possible to find out if the call is an emergency call. If the address of the user device The segment is not in the address segment of the softswitch jurisdiction. The softswitch knows where the caller is a nomadic user, where the nomadic is, and whether it is an emergency call, and thereby selects which emergency center the emergency call and nomadic address should be routed to. , so as to carry out a suitable connection operation.

Preferred operations of this embodiment will be described below.

Preferably, the softswitch pre-stores an emergency number correspondence table, where the table includes the called emergency prefix field. When the softswitch receives the call of the user equipment, analyzing the called number of the call, the specific analysis process includes the following steps: when the called number corresponds to the record in the called emergency prefix field, determining that the call is an emergency call The called number is an emergency number.

More preferably, the emergency number correspondence table may further include an IP address domain and an emergency routing prefix field. The softswitch selects the emergency center according to the IP address, and the following steps are performed: The softswitch queries the emergency number correspondence table according to the IP address, and obtains the IP address and the emergency number. The corresponding emergency route prefix selects the corresponding emergency center according to the IP address and the emergency route prefix.

Optionally, the softswitch saves the emergency number correspondence table, where the called emergency prefix field, and the called number of the softswitch analysis call indication includes the following steps: when the called number does not correspond to the record in the called emergency prefix field When the softswitch determines that the call is a normal call, the called number is a normal number.

Optionally, the softswitch connects the call to the emergency center and includes the following steps: the softswitch analyzes the location call according to the normal call number and performs the connection.

An embodiment of the emergency call of the present invention provides an emergency call processing system. The structure of the emergency call processing system is as shown in FIG.

The registration device 601 is configured to register the softswitch of the user equipment to the home location through the remote IP network after nomadic to the remote device;

Softswitch (also known as softswitch) 602, which includes:

The IP address obtaining block 6021 is configured to obtain an IP address of the user equipment from the message of the call when the user equipment initiates the call;

The emergency center selection module 6022 is configured to: when the called number of the call indication is an emergency number, select an emergency center according to the IP address;

The connection module 6023 is used to connect the call to the emergency center.

Optionally, the softswitch may further include: a storage module, configured to save an emergency number correspondence table, where the emergency number correspondence table includes: the called emergency prefix field, and further includes: an IP address domain and a tight Urgent routing prefix field.

Optionally, the storage module in the softswitch device stores an emergency number correspondence table, where the called emergency prefix field is included, and the emergency center selection module 6022 is configured to instruct the softswitch device to correspond to the called emergency prefix field. When the record is made, the call is determined to be an emergency call, and the called number is an emergency number. That is, when the storage module in the softswitch device stores the emergency number correspondence table including the called emergency prefix field, the emergency center selection module 6022 includes an emergency call determination unit and an emergency center selection unit, where the emergency a call judging unit, configured to determine whether the called number of the call corresponds to a record of the called emergency prefix field in the storage module, and if yes, determine that the call is an emergency call, and the called number is an emergency number The emergency center selection unit is configured to select a corresponding emergency center according to the IP address.

Optionally, the emergency number correspondence table further includes an IP address field and an emergency route prefix field, and the emergency center selection module 6022 is configured to instruct the softswitch to query the emergency number correspondence table to obtain an emergency route corresponding to the IP address and the emergency number. The prefix is selected to select the corresponding emergency center. That is, the emergency number correspondence table may include: a called emergency prefix domain, an IP address domain, and an emergency routing prefix field, where the emergency center selection module includes: an emergency call determining unit, an inquiry unit, and an emergency center selecting unit . The function and the function of the emergency call judging unit and the emergency center selecting unit are as described above. The query unit is used to query the emergency number correspondence table in the storage module to obtain the IP. Addressing the emergency routing prefix corresponding to the emergency number, and sending the emergency routing prefix to the emergency center selecting unit, where the emergency center selecting unit selects the corresponding emergency center according to the received emergency routing prefix .

In the above softswitch system, the softswitch device stores an emergency number correspondence table, which includes the called emergency prefix field, and the emergency center selection module 6022 is configured to instruct the softswitch device that the called number does not correspond to the called emergency prefix field. In the recording, the call is determined to be a normal call, and the called number is a normal number. That is, when the emergency call determination unit determines that the called number of the call does not correspond to the record in the called emergency prefix field, the emergency center selection module 6022 further includes: a common number connection unit And, when receiving the called number of the call sent by the emergency call determining unit does not correspond to the record in the called emergency prefix field, analyzing the call according to the normal calling number, and performing the connection .

Optionally, the connection module 6023 is configured to instruct the softswitch to perform positioning according to the normal call number. Call, and continue to connect.

In the embodiment of the present invention, a softswitch is further provided, including: an IP address obtaining module, configured to: when a user equipment initiates a call, obtain an IP address of the user equipment from a message of the call; an emergency center selection module, configured to analyze The called number of the call indication is an emergency number, and an emergency center is selected according to the IP address; and a connection module is used to connect the call to the emergency center.

Optionally, the softswitch further includes: a storage module, configured to save an emergency number correspondence table, where the emergency number correspondence table includes: the called emergency prefix field, and further includes: an IP address domain and an emergency routing prefix field .

Optionally, the emergency center selection module may include: an emergency call determination unit and an emergency center selection unit. Further, the emergency center selection module may further include: an emergency call determination unit, an inquiry unit, and an emergency center selection unit. The functions and functions of the emergency call judging unit, the query unit, and the emergency center selecting unit are described in the corresponding system, and will not be described again.

The emergency center selection module may further include: a common number connection unit, configured to: when receiving the called number of the call sent by the emergency call determining unit does not correspond to the record in the called emergency prefix field , locate the call according to the normal call number analysis, and connect.

FIG. 9 is a schematic diagram showing an emergency call of a nomadic user according to an embodiment of the present invention. As shown in the figure, the emergency center A area is connected to the softswitch through the ISUP (ISDN User Part) relay mode, and the emergency center B zone is also connected to the softswitch through the ISUP trunk. Yes

The ISUP trunk is also a SIP (Session Initiation Protocol) trunk. For the softswitch, it is a trunk. However, the emergency center C zone is accessed through the user mode and accessed through the subscriber line. It is a local user for softswitches.

The area here may be a softswitch overlay, or a softswitch may be connected through a relay; g殳 User A is a user of Zone A, who is nomadic to Zone C, and after the user is nomadic to Zone C, is registered through the network of Zone C. Softswitch, at this time, the user needs to dial the emergency number 110 to connect to the emergency center of the C area. The entire routing process is as shown in FIG. 10, including the following steps:

Step S71: User A initiates a call, and the softswitch obtains at least the user from the message of the call.

In the embodiment, the IP address is taken as an example. This is an IP address of the C area. In step S72, the softswitch analyzes whether the called number is an emergency number. For example, the softswitch saves the emergency number correspondence table, which includes Called the emergency prefix field, the called number of the softswitch analysis call includes the following Step: When the called number corresponds to the record in the called emergency prefix field, it is determined whether the call is an emergency call, if it is determined that the call is an ordinary call, step S76 is performed, otherwise step S73 is performed; The call number is analyzed, that is, the call route corresponding to the IP address is determined according to the obtained IP address. For the specific implementation process, refer to the corresponding implementation process in the corresponding method, which is not mentioned here.

Step S73, performing route analysis, and matching the emergency number correspondence table;

Step S74, obtaining a corresponding emergency number;

Step S75, performing analysis according to the translated emergency number (ie, the corresponding emergency number described in step S74);

Step S77: locate the user or the relay, and determine whether the different emergency centers are selected according to the set IP address at the same time;

Step S78, the softswitch performs call connection according to the emergency center number.

The softswitch stores the following emergency number correspondence table:

The IP address, the called emergency prefix, and the emergency routing prefix; the softswitch matches this table when performing route analysis in step S73, so as to select an appropriate emergency routing prefix, as shown in Table 2 above:

In this way, after the user nomads, dial the prefix of 110 to select different emergency centers;

At the same time, the softswitch needs to support IP address wildcarding, such as 10.ll.xx.xx, which means any IP address starting with 10.11.

From the above description, it can be seen that the foregoing embodiments of the present invention achieve the following technical effects: In the above embodiment of the present invention, the softswitch determines that the calling party is by analyzing the IP address of the calling party and analyzing the called number. The nomadic user, where the nomadic travels, and whether it is an emergency call, and thereby select which emergency center the emergency call and nomadic address should be routed to in order to perform the appropriate connection. In this way, the user can make the emergency number to be connected to the nearest emergency center in the case of nomadic, thereby ensuring that the emergency situation of the user is processed in time.

Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present invention can be implemented by devices, which can be concentrated on a single device or distributed on a network composed of multiple devices, optionally They can be implemented by program code executable by the device, so that they can be stored in the storage device by the device, or they can be separately fabricated into individual integrated circuit modules, or multiple modules or steps can be made. Implemented as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. It is to be understood that changes in these specific embodiments will be apparent to those skilled in the art without departing from the scope of the invention.

The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It is considered as the scope of protection of the present invention.

Claims

Rights request

A call routing method, characterized in that it comprises the steps of:

The call routing method according to claim 1, wherein the query determines that the call route corresponding to the acquired routing condition including at least the calling party IP address information is:

The switching device queries the correspondence between the routing condition of the at least one calling party's IP address information and the call route stored by the switching device according to the obtained routing condition, and further determines the call route corresponding to the acquired routing selection condition.

The switching device queries the location server for the corresponding call route according to the obtained routing condition;

The location server queries the mapping relationship between the routing condition and the call routing that the at least one of the calling party's IP address information is stored, and further determines the call route corresponding to the obtained routing condition including at least the calling party's IP address information;

The location server returns the determined call routing information to the switching device.

The call routing method according to claim 1, wherein, after the user is nomadic, and the home network is registered by the remote IP network, the method further includes: if it is determined that the user initiates The call is an emergency call, and the emergency center is selected according to a routing condition including at least the calling party's IP address information.

The call routing method according to claim 4, wherein the process of determining that the user initiated call is an emergency call is:

When the called number of the call corresponds to the record in the called emergency prefix field in the emergency number correspondence table, it is determined that the call is an emergency call.

The call routing method according to claim 5, wherein the emergency number correspondence table further includes: an IP address domain and an emergency route prefix field, wherein the switching device includes at least a calling party IP address information according to the The routing criteria for selecting an emergency center are:

The switching device queries the emergency number correspondence table, obtains the emergency route prefix corresponding to the IP address and the emergency number, and selects a corresponding emergency center according to the IP address and the emergency routing prefix.

The call routing method according to any one of claims 1 to 6, wherein the routing condition further comprises:

Call source, calling user category, calling time period, called user number, bearer service type, and/or emergency number correspondence table;

The switching device or the location server query determines that the corresponding call route specifically includes:

The corresponding call route is determined according to the calling party IP address information combined with the routing conditions of the call source, the calling user category, the calling time period, the called user number, the bearer service type, and/or the emergency number correspondence table.

8. The call routing method according to claim 7, wherein said calling party

The IP address information is the primary access gateway IP address information or the calling relay gateway IP address information or the calling terminal device IP address information.

A switching device, comprising: a call routing processing unit, wherein the call routing processing unit comprises:

The route determining unit is configured to query the corresponding relationship stored in the storage unit according to the obtained routing condition to determine a corresponding call route.

The switching device according to claim 9, wherein the route determining unit comprises:

a query processing unit, configured to query, in the storage unit, the storage unit according to the acquired routing condition Corresponding relationship, determining whether there is a call route matching the obtained routing condition, and sending a matching judgment result;

And a routing unit, configured to: when the query processing unit receives the call route that matches the acquisition routing condition, route the call that matches the acquisition routing condition as the selected call route.

The switching device according to claim 9 or 10, wherein after the user is nomadic to the remote place and registered with the home network through the remote IP network, the switching device further includes: emergency center selection The module is configured to select an emergency center according to a routing condition including at least a calling party IP address information when determining that the user initiated call is an emergency call.

The switching device according to claim 11, wherein the storage unit further stores an emergency number correspondence table, wherein the emergency number correspondence table includes a called emergency prefix field, and the emergency center selection module includes:

The emergency call determining unit is configured to determine whether the called number of the call corresponds to the record of the called emergency prefix field, and if yes, determine that the call is an emergency call;

An emergency center selection unit is configured to select a corresponding emergency center according to a routing condition including at least a calling party IP address information.

The switching device according to claim 12, wherein the emergency center selection module further comprises:

a query unit, configured to query the emergency number correspondence table in the storage unit, obtain an emergency route prefix in the emergency number correspondence table corresponding to the IP address and the emergency number, and instruct the emergency center selection unit to perform the The emergency routing prefix selects the corresponding emergency center.

The switching device according to claim 9, wherein the switching device further comprises: a connecting unit, configured to connect the call according to the determined corresponding route.

15. A location server, comprising:

The location server according to claim 15, wherein the route determining unit comprises:

a query processing unit, configured to receive a routing condition including at least the calling party IP address information, and query the corresponding relationship stored in the storage unit according to the routing condition to determine whether there is a call routing that matches the routing condition And sending a matching judgment result;

a routing unit, configured to: when the query processing unit receives the call route that matches the routing condition including the at least the calling party IP address information, the route with the at least the calling party IP address information A call route with matching conditions is selected as the selected call route, and the call route is fed back.

A network system, comprising: a location server and a switching device, wherein the switching device is integrated with a call routing processing unit, wherein

The call routing processing unit includes:

19. The network system according to claim 18, wherein the location server comprises:

a storage unit, configured to store a routing condition and a call including at least a calling party IP address information Corresponding relationship of routes;

The route determining unit is configured to determine and feed back the corresponding call route according to the correspondence relationship stored in the routing condition query storage unit that includes the calling party IP address information sent by the call routing query unit.

The network system according to claim 19, wherein the route determining unit comprises:

a query processing unit, configured to determine, according to the correspondence relationship stored in the routing condition query storage unit that includes the calling party IP address information sent by the call routing query unit, whether there is a matching with the routing condition Call routing, and send matching judgment results;

a routing unit, configured to: when receiving a call route that matches a routing condition including at least a calling party IP address information, routing the call that matches a routing condition including at least a calling party IP address information As a selected call route, and feedback the call route.

21. An emergency call processing system, comprising:

a registration device, configured to instruct the user equipment to register to the soft exchange of the home location through the remote IP network after nomadic to the remote location;

Softswitch, which includes:

An IP address obtaining module, configured to acquire an IP address of the user equipment from a message of the call when the user equipment initiates a call;

An emergency center selection module, configured to: when the called number of the call indication is an emergency number, select an emergency center according to the IP address;

a connection module, configured to connect the call to the emergency center.

The emergency call processing system according to claim 21, wherein the softswitch further comprises: a storage module, configured to save an emergency number correspondence table, where the emergency number correspondence table includes: the called emergency prefix field Further, the method further includes: an IP address domain and an emergency routing prefix field.

The emergency call processing system according to claim 21, wherein the soft handover saves an emergency number correspondence table, including a called emergency prefix field, and the emergency center selection module includes:

An emergency call determining unit, configured to instruct the softswitch to determine whether the called number of the call corresponds to a record in the called emergency prefix field in the storage module, and if yes, determine that the call is urgent Call, the called number is an emergency number;

An emergency center selection unit is configured to select a corresponding emergency center according to the IP address.

The emergency call processing system according to claim 23, wherein the emergency center selection module further comprises:

The queried unit, the emergency number correspondence table further includes an IP address field and an emergency route prefix field, where the emergency center selection module is configured to instruct the soft number query storage module to perform the emergency number correspondence table, and obtain the IP address. An emergency routing prefix corresponding to the emergency number, and instructing the emergency center selection unit to select a corresponding emergency center according to the emergency routing prefix.