CN101014004B - Emergency call processing method and system and a softswitch - Google Patents

Abstract

The invention provides one emergency call process method and system, which comprises the following steps: user device rambles to different place and through different IP network registering belonged flexible exchange; when user device starts call, flexible exchange gets user device IP address from called information; flexible exchange analysis indication called number and selecting emergency center; the flexible exchange connects the call to emergency center. The invention also provides one flexible exchange.

Description

Emergency call processing method and system and a softswitch

technical field

The present invention relates to the communication field, and more specifically, relates to an emergency call processing method, an emergency call processing system, and a soft switch.

Background technique

Softswitch is based on IP (Internet Protocol, Internet Protocol) network, and has the characteristics of cross-domain networking. If there is a soft terminal or an IP phone, the number placed in Shenzhen may arrive in Shanghai due to a business trip. If you dial an emergency number, you should be connected to the emergency center in Shanghai, not to the emergency center in Shenzhen; this problem also exists for calls from a local network, for example, a user in area A of Shenzhen nomads to area B No, the emergency call at this time needs to be connected to area B instead of area A. The so-called nomadic means that the user moves from one region to another; common emergency calls include, for example, 110, 119, 120, 122, etc.

In the IMS (IP Multimedia Subsystem, IP Multimedia Subsystem) stage, the above-mentioned problems are solved through HSS (Home Subscriber Server, Home Subscriber Server); but currently in NGN (Next Generation Net, Next Generation Network), the existing technology is still There is no related solution.

The emergency center can be connected to the softswitch through the trunk, or connected to the softswitch through the subscriber line. If it is connected to the softswitch through the subscriber line, it is the call of the local office, not out of the office, and does not involve route selection. Problem, in this case, using the existing routing technology, it cannot be connected.

All in all, in the IP network, especially in the NGN network controlled by the soft switch, the network adopts the IP structure, and currently basically adopts a number routing mechanism similar to the PSTN (Public Switching Telecommunications Network, Public Switching Telecommunications Network), which cannot realize the nomadic nature of IP terminals emergency number routing.

Therefore, people need an emergency call solution to solve the emergency call routing problem of nomadic users in the above related technologies.

Contents of the invention

The present invention aims to provide an emergency call processing method and system as well as a soft switch, which can solve the problem of emergency users connecting to emergency numbers correctly when they are nomadic.

According to one aspect of the present invention, a method for processing an emergency call is provided, comprising the following steps: after the user equipment nomads to a different place, it registers with the softswitch at the home place through the IP network of the different place; obtain the IP address of the user equipment in the message; the softswitch analyzes the called number indicated by the call as an emergency number, and selects the emergency center according to the IP address; and the softswitch connects the call to the emergency center.

In the above-mentioned emergency call processing method, the softswitch saves the emergency number correspondence table, which includes the called emergency prefix field, and the softswitch analyzes the called number indicated by the call including the following steps: when the called number corresponds to the called emergency prefix When the records in the field are checked, the call is determined to be an emergency call, and the called number is an emergency number.

In the above-mentioned emergency call processing method, the emergency number correspondence table also includes an IP address field and an emergency routing prefix field, and the selection of the emergency center by the softswitch according to the IP address includes the following steps: the softswitch queries the emergency number correspondence table, and obtains the IP address and emergency number. The emergency routing prefix corresponding to the number, so as to select the corresponding emergency center.

In the above-mentioned emergency call processing method, the softswitch saves the emergency number correspondence table, which contains the called emergency prefix field, and the softswitch analyzes the called number indicated by the call including the following steps: when the called number does not correspond to the called emergency number When recording in the crown domain, the softswitch determines that the call is an ordinary call, and the called number is an ordinary number.

In the above emergency call processing method, connecting the call to the emergency center by the soft switch includes the following steps: the soft switch analyzes and locates the call according to the common call number, and performs the connection.

According to another aspect of the present invention, a softswitch system is provided, including: a registration device, which is used to instruct user equipment to register to a softswitch at home through an IP network in a different place after it nomadizes to a different place; the softswitch includes: an IP The address acquisition module is used to obtain the IP address of the user equipment from the call message when the user equipment initiates a call; the emergency center selection module is used to analyze that the called number indicated by the call is an emergency number, and select the emergency center according to the IP address ; and a connection module for connecting the call to the emergency center.

In the above-mentioned softswitch system, the softswitch saves the emergency number corresponding table, which contains the called emergency prefix field, and the emergency center selection module is used to instruct the softswitch when the called number corresponds to the record in the called emergency prefix field , determine that the call is an emergency call, and the called number is an emergency number.

In the above-mentioned softswitch system, the emergency number correspondence table also includes an IP address field and an emergency route prefix field, and the emergency center selection module is used to instruct the softswitch to query the emergency number correspondence table to obtain the emergency route corresponding to the IP address and the emergency number prefix to select the corresponding emergency center.

In the above softswitch system, the softswitch saves the emergency number corresponding table, which contains the called emergency prefix field, and the emergency center selection module is used to instruct the softswitch when the called number does not correspond to the record in the called emergency prefix field , the call is determined to be an ordinary call, and the called number is an ordinary number.

In the above-mentioned softswitch system, the connection module is used to instruct the softswitch to analyze and locate the call according to the common call number, and perform connection.

According to another aspect of the present invention, a soft switch is also provided, including: an IP address acquisition module, used to obtain the IP address of the user equipment from the call message when the user equipment initiates a call; an emergency center selection module, configured to The called number for analyzing the call indication is an emergency number, and the emergency center is selected according to the IP address; and the connecting module is used for connecting the call to the emergency center.

From the above description, it can be seen that the above-mentioned technical solution of the present invention can achieve the following technical effects:

By analyzing the IP address of the calling party and the number of the called party, the softswitch determines that the calling party is a nomadic user, where the nomadic user goes, and whether it is an emergency call, and thus selects which emergency call and nomadic address should be routed to. Center, so as to carry out the appropriate splicing operation. In this way, when the user is nomadic, calling the emergency number can be connected to the nearest emergency center, thereby ensuring that the emergency situation of the user is handled.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 shows a flowchart of an emergency call processing method according to an embodiment of the present invention;

Fig. 2 shows the block diagram of the softswitch system according to the embodiment of the present invention;

Fig. 3 shows a schematic diagram of an emergency call of a nomadic user according to an embodiment of the present invention; and

FIG. 4 shows a flow chart of the emergency call processing method for nomadic users according to FIG. 3 .

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

The embodiment of the present invention provides an emergency call processing method, as shown in Figure 1, comprising the following steps:

Step S102, after the user equipment nomads to a different place, it registers to the softswitch of the place of origin (that is, the region to which the user equipment belongs before nomadism) through the IP network of the different place;

Step S104, when the user equipment initiates a call, the softswitch acquires the IP address of the user equipment from the call message;

Step S106, the softswitch analyzes that the called number of the call is an emergency number, and selects an emergency center according to the IP address; and

Step S108, the softswitch connects the call to the emergency center.

In the above emergency call processing method, since the softswitch obtains the IP address of the user equipment, it can find out the address segment it belongs to according to the IP address, and then find out the current location of the nomadic user. By analyzing the called number, it is also possible to find out whether the call is an emergency call. If the address segment of the user equipment is not in the address segment under the jurisdiction of the softswitch, the softswitch will know that the calling party is a nomadic user and where the nomadic user is, and determine whether it is an emergency call, and thus select the emergency call and the nomadic address. Which emergency center to route to for proper connection.

A preferred operation according to this embodiment will be described below.

The softswitch saves the emergency number correspondence table, which contains the called emergency prefix field, and the softswitch analyzes the called number of the call including the following steps: When the called number corresponds to the record in the called emergency prefix field, determine that the call is emergency Call, the called number is an emergency number.

More preferably, the emergency number correspondence table also includes an IP address field and an emergency routing prefix field, and the softswitch selects the emergency center according to the IP address and includes the following steps: 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 routing prefix, so as to select the corresponding emergency center.

Optionally, the softswitch saves the emergency number correspondence table, which includes the called emergency prefix field, and the softswitch analyzes the called number indicated by the call including the following steps: When the called number does not correspond to the record in the called emergency prefix field , the softswitch determines that the call is an ordinary call, and the called number is an ordinary number.

Optionally, connecting the call to the emergency center by the soft switch includes the following steps: the soft switch analyzes and locates the call according to the common call number, and performs the connection.

According to an embodiment of the present invention, a softswitch system 200 is provided, including:

The registration device 202 is used for the user equipment to register to the softswitch of the home location through the IP network of the remote location after the user equipment nomadizes to the remote location;

Soft switch (also can be referred to as soft switch device) 210, it comprises:

The IP address obtaining module 204 is used for obtaining the IP address of the user equipment from the message of the call when the user equipment initiates a call;

An emergency center selection module 206, configured to analyze that the called number indicated by the call is an emergency number, and select the emergency center according to the IP address; and

A connecting module 208, configured to connect the call to the emergency center.

Optionally, the softswitch device saves the emergency number correspondence table, which includes the called emergency prefix field, and the emergency center selection module 206 is used to instruct the softswitch device that when the called number corresponds to the record in the called emergency prefix field, It is determined that the call is an emergency call, and the called number is an emergency number.

Optionally, the emergency number correspondence table also includes an IP address field and an emergency routing prefix field, and the emergency center selection module 206 is used to instruct the softswitch device to query the emergency number correspondence table to obtain the emergency routing prefix corresponding to the IP address and the emergency number , so as to select the corresponding emergency center.

In the above-mentioned softswitch system, the softswitch device saves the emergency number correspondence table, which includes the called emergency prefix field, and the emergency center selection module 206 is used to instruct the softswitch device when the called number does not correspond to the called emergency prefix field. When the record in , it is determined that the call is an ordinary call, and the called number is an ordinary number.

Optionally, the connection module 208 is used to instruct the softswitch to analyze and locate the call according to the common call number, and to perform connection.

A soft switch is also provided in the embodiment of the present invention, including: an IP address acquisition module, used to obtain the IP address of the user equipment from the call message when the user equipment initiates a call; an emergency center selection module, used for analyzing The called number indicated by the call is an emergency number, and the emergency center is selected according to the IP address; and the connecting module is used for connecting the call to the emergency center.

Fig. 3 shows a schematic diagram of an emergency call of a nomadic user according to an embodiment of the present invention. As shown in the figure, area A of the emergency center is connected to the softswitch through an ISUP (ISDN User Part) relay, and area B of the emergency center is also connected to the softswitch through an ISUP relay. Whether it is an ISUP trunk or a SIP (SessionInitiation Protocol, Session Initiation Protocol) trunk, it is a trunk for a softswitch, but the emergency center C area is accessed through a user mode and an access gateway accessed through a subscriber line. For softswitches, it is a local user.

The area here can be covered by a soft switch, or it can be connected by a soft switch through a relay;

Assume that user A is a user in area A, and he nomads to area C. After the user nomads to area C, he registers with the softswitch through the network of area C. At this time, the user needs to dial the emergency number 110 to be connected to the emergency center in area C. The routing process is shown in Figure 4, including the following steps:

Step S402, user A initiates a call, and the softswitch obtains the user's IP address from the call message, which is the IP address of area C;

Step S404, the softswitch analyzes whether the called number is an emergency number, for example, the softswitch saves the emergency number correspondence table, which contains the called emergency prefix field, and the softswitch analyzes the called number of the call including the following steps: when the called number corresponds to When recording in the called emergency prefix field, determine whether the call is an emergency call, if it is determined that the call is an ordinary call, then perform step S412, otherwise perform step S406;

Step S412, analyzing according to the common call number.

Step S406, perform routing analysis, and match to the emergency number correspondence table;

Step S408, obtaining the corresponding emergency number;

Step S410, analyze according to the translated emergency number (i.e. the corresponding emergency number described in step S408);

Step S414, locating the user or relay, and judging whether to select a different emergency center according to the set IP address at the same time;

In step S416, the softswitch performs call connection according to the emergency center number.

The softswitch saves the emergency number correspondence table as follows:

IP address, called emergency prefix-emergency routing prefix; Softswitch matches this form when performing routing analysis in step S406, thereby selecting a suitable emergency routing prefix, for example:

10. 11. 12. 12 110 0755110

10. 15. 11. 13 110 020110

10. 15. 13. 13 110 2897110

10. 15. 14. 13 110 2897110

In this way, the user dials 110 to select a different emergency center after being nomadic;

At the same time, the softswitch needs to support wildcarding of IP addresses, such as 10.11.xx.xx, which means any IP address beginning with 10.11.

From the above description, it can be seen that the above-mentioned embodiments of the present invention have achieved the following technical effects:

In the above-mentioned embodiments of the present invention, the softswitch determines that the calling party is a nomadic user by analyzing the IP address of the calling party and the called number, and where the nomadic user goes, and whether it is an emergency call, and thus selects the emergency call. The emergency center to which calls and nomadic addresses should be routed so that appropriate onward operations can be made.

In this way, when the user is nomadic, calling the emergency number can be connected to the nearest emergency center, thereby ensuring that the emergency situation of the user is handled in time.

Apparently, those skilled in the art should understand that each module or each step of the present invention described above can be realized by devices, and they can be concentrated on a single device, or distributed on a network formed by multiple devices, optionally , they can be implemented with executable program codes of the device, thus, they can be stored in the storage device and executed by the device, or they can be made into individual integrated circuit modules, or a plurality of modules or steps in them can be made implemented as a single integrated circuit module. As such, the present invention is not limited to any specific combination of hardware and software. It should be understood that changes in these specific implementations are obvious to those skilled in the art and do not depart from the spirit protection scope of the present invention.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (9)

1. an emergent call processing method is characterized in that, may further comprise the steps:

The nomadic soft switch that is registered to ownership place behind the strange land by the IP network in described strange land of subscriber equipment;

When described subscriber equipment made a call, described user device IP address was obtained in described soft switch from the message of described calling;

The described calling of described flexible exchange analysis is urgent call, and according to the urgent center of described IP address choice; And

Described soft switch is arrived described urgent center with described call proceeding.

2. emergent call processing method according to claim 1, it is characterized in that, the emergency numbers correspondence table is preserved in described soft switch, wherein comprise called urgent prefix territory, the described calling of described flexible exchange analysis is that urgent call may further comprise the steps: when described called number during corresponding to the record in the described called urgent prefix territory, judge that described calling is urgent call, described called number is an emergency numbers.

3. emergent call processing method according to claim 2, it is characterized in that, described emergency numbers correspondence table also comprises IP address field and urgent route prefix territory, described soft switch may further comprise the steps according to the urgent center of described IP address choice: described emergency numbers correspondence table is inquired about in described soft switch, obtain the pairing urgent route prefix of described IP address and described emergency numbers, thereby select corresponding urgent center.

4. emergent call processing method according to claim 1, it is characterized in that, the emergency numbers correspondence table is preserved in described soft switch, wherein comprise called urgent prefix territory, the called number of the described calling of described flexible exchange analysis indication may further comprise the steps: when described called number does not correspond to record in the described called urgent prefix territory, described soft switch judges that described calling is ordinary call, and described called number is common number.

5. a urgent call treatment system is characterized in that, comprising:

Register device is used to instruct the nomadic soft switch device that is registered to ownership place behind the strange land by the IP network in described strange land of subscriber equipment;

The soft switch device, it comprises:

The IP address acquisition module is used for when described subscriber equipment makes a call, and obtains described user device IP address from the message of described calling;

Module is selected at urgent center, and the called number that is used to analyze described calling indication is an emergency numbers, and according to the urgent center of described IP address choice; And

Connecting module is used for described call proceeding to described urgent center.

6. urgent call treatment system according to claim 5, it is characterized in that, described soft switch device is preserved the emergency numbers correspondence table, wherein comprise called urgent prefix territory, described urgent center selects module to be used for instructing described soft switch device when described called number during corresponding to the record in described called urgent prefix territory, judge that described calling is urgent call, described called number is an emergency numbers.

7. urgent call treatment system according to claim 6, it is characterized in that, described emergency numbers correspondence table also comprises IP address field and urgent route prefix territory, described urgent center selects module to be used to instruct described soft switch device to inquire about described emergency numbers correspondence table, obtain the pairing urgent route prefix of described IP address and described emergency numbers, thereby select corresponding urgent center.

8. urgent call treatment system according to claim 5, it is characterized in that, described soft switch device is preserved the emergency numbers correspondence table, wherein comprise called urgent prefix territory, described urgent center selects module to be used for instructing described soft switch device when the record in described called number does not correspond to described called urgent prefix territory, judge that described calling is ordinary call, described called number is common number.

9. a soft switch device is characterized in that, comprising:

The IP address acquisition module is used for when subscriber equipment makes a call, and obtains described user device IP address from the message of described calling;

Module is selected at urgent center, and the called number that is used to analyze described calling indication is an emergency numbers, and according to the urgent center of described IP address choice; And

Connecting module is used for described call proceeding to described urgent center.

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