CN100407736C - A method for realizing the number portability service of the whole network through a routing service device - Google Patents

Abstract

The invention is a method for realizing the number portability service of the whole network through a routing service device. When numbering, the user number and the area number are combined into a unique user characteristic number. Report to the routing service device of its parent node, and the routing service device that receives the report updates the routing information table accordingly and synchronizes it to the relevant node. When the mobile user is transferred, the softswitch device where the calling party is located initiates a query request to the routing service device of its parent node, and the request contains the characteristic number of the mobile user. After receiving the routing information of the device, a call flow is established with the softswitch device where the user is located; the invention meets the requirement of the user to carry numbers across networks and regions, and greatly facilitates the user.

Description

A method for realizing the number portability service of the whole network through a routing service device

technical field

The invention relates to a call communication method under the next generation network architecture, in particular to a number portability method.

Background technique

Route Server is a server that provides routing information services for SoftSwitch devices. In the early stage of the development of SoftSwitch architecture, there were not many SoftSwitch devices on the network, and the number was limited. The databases of each other could store the information of the entire network. Relevant routing information, in this way, the call can be accepted more quickly. After the large-scale promotion and application of softswitch equipment, it is difficult to rely on the softswitch equipment itself to refine the configuration of related routes. On the one hand, the configuration required by softswitch equipment and its complicated and huge data make daily maintenance of routing information very difficult. At this time, a considerable number of routing service devices should be introduced to take on the heavy responsibility of routing services.

In the Chinese patent application with the application number 200310112905.X, a method and system for implementing call routing by using a routing service device are disclosed. The maintenance of user routing information is realized by reporting and registering user routing information. , the calling softswitch device obtains the routing information of the called softswitch device by initiating a query request to the routing service device).

The number portability service means that users can use the same user number in different networks in different regions. This demand comes from the overall status of the current communication network. Analyzing the current communication network, it can be seen that the current communication network is a communication network with multiple networks coexisting. In the traditional switch based on circuit switching, the location of the user is limited by the network and the region, and there are many switching offices according to the network and the region. It is impossible to use the original phone number without the phone, which brings inconvenience to many users.

In real life, it often happens that users move across networks and regions due to changing their residence or other reasons. If the user cannot use the original number after changing the place of residence, the user must notify his relatives, friends or business partners of his new phone number every time he changes his place of residence, which brings a lot of trouble. The development of softswitch technology brings a new solution to this problem. Through the introduction of routing service devices, the user number portability service across networks and regions can be easily realized.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for realizing the number portability service of the whole network through the routing service device, so that the user can still use the original number when moving from one softswitch system to another softswitch system.

In order to solve the above-mentioned technical problems, the present invention provides a method for realizing number portability services of the whole network through a routing service device, which is applied to a softswitch device as a bottom node and is connected to at least one routing service device, and the routing service device is used as a node above the second layer In a hierarchical mesh system connected to at least one child node, the following steps are included:

(a) When numbering, combine the user number and area number into a unique user characteristic number;

(b) After the user moves across regions, the moved-out and moved-in softswitch devices report the routing change information of the user to the routing service device of its parent node respectively, and the reported information includes the user characteristic number, the route of the softswitch device where the user is located information and type of operation;

(c) The softswitch equipment that the user moves into establishes the relevant information of the user with the characteristic number of the user;

(d) The routing service device that receives the reported information updates the routing information table accordingly according to the reported information, and simultaneously synchronizes the routing change information to the parent node and the designated routing service device at the same level;

(e) When other users call the mobile user, if there is a characteristic number of the mobile user in the softswitch of the calling party, the connection is completed locally; otherwise, a routing query request is initiated to the routing service device of its parent node, and the request includes The characteristic number of the mobile user;

(f) The routing service device that receives the query request searches for the record of the mobile user in the routing information table according to the characteristic number of the mobile user, and after obtaining the query result, the route of the softswitch where the mobile user is currently located The information is returned to the softswitch device where the caller is located;

(g) After the softswitch equipment where the calling party is located obtains the routing information of the softswitch equipment where the mobile user is currently located, establish a call flow with the softswitch equipment where the mobile user is located;

(h) After receiving the call, the softswitch where the called user is located finds the information of the mobile user and connects the call directly.

Said method is characterized in that, in said step (a), to the user of the softswitch equipment corresponding to the area code in the mobile user feature number, when dialing the mobile user, only dial the user number, the softswitch equipment When processing, it automatically adds its own area code before the called user number, and combines it into the mobile user's characteristic number for querying. When users of other softswitches call the mobile user, they must dial the mobile user feature number.

The above-mentioned method is characterized in that, in the step (f), when the routing service device that receives the query request does not find the record of the mobile user in the routing information base, it continues to its parent node. Inquire.

The above method is characterized in that the same protocol can be used between the routing service device and the softswitch to complete the reporting and querying of routing information.

The above-mentioned method is characterized in that the reported information may also include the network type of the mobile user before the mobile transfer

As can be seen from the above, the present invention realizes various users under the control of the softswitch system to carry number services across networks and domains through the routing service device that completes the routing function between the softswitch systems, so that users under the control of the softswitch system If the region is moved to another softswitch system, through the routing service function of the routing service device, the user can still use the original user number in the new softswitch system, thus meeting the user's need to carry numbers across networks and regions, greatly The convenience of the user.

Description of drawings

Fig. 1 is a schematic diagram of networking of the system of the embodiment of the present invention;

FIG. 2 is a schematic diagram of a network after porting a mobile number according to an embodiment of the present invention;

Fig. 3 is a flow chart of the mobile phone transfer process of the whole network number portability service according to the embodiment of the present invention;

Fig. 4 is a flow chart of a call process in which a mobile user of the network-wide number portability service is called as a called party according to an embodiment of the present invention.

Detailed ways

In the present invention, at first structure such a system: be made up of soft switch equipment, routing service device and the user terminal controlled by soft switch, each soft switch equipment controls the call of part user terminal that oneself carries respectively, each soft switch equipment and routing The service device is a node in the hierarchical network structure, the softswitch device is the leaf node of the lowest layer, at least one routing service device is used as the parent node, and each routing service device has at least one child node, which can be a softswitch device type or routing service device type.

As shown in Figure 1, it is an example of the above-mentioned system. In the figure, in the cross-network and cross-region number portability implementation architecture in which the routing service device participates, users A1, A2, and A3 are users in the control domain of the softswitch device SS1. B1, B2, and B3 are users in the domain controlled by the softswitch SS2, and users C1 and C2 are users in the domain controlled by the softswitch SS3. Routing service device RS1 provides routing services for softswitches SS1 and SS2, routing service device RS2 provides routing services for softswitching device SS3, routing service device RS3 is the upper node of routing service device RS1 and routing service device RS2.

Furthermore, if it is desired to accurately and uniquely locate user routing information in the routing service device, it is necessary to uniformly number users in each network and each region. When the existing fixed network implements cross-area calls, the area code is added before the dialed user number, and the route of the user is uniquely located by the area code. However, after the cross-area transfer, the user cannot use the original user number, and the corresponding area code Changes as the region changes.

Because the existing fixed telephone network is still an important part of the next generation network, it is impossible to renumber the user numbers uniformly in the whole network. In order to realize the uniqueness of the user numbers, the present invention uses the user number plus the area code as the user's characteristic number , where the meaning of the user number is the same as that of the existing telephone system, and the area code is the area code of the area where the user number is used. This feature number can realize the uniqueness and versatility of the whole network, as the basis for locating the user route, and then ensure that the soft switch system reports to the routing service device and inquires about the route of the soft switch device where the mobile user is currently located, and guarantees the user attribute information The uniqueness and universality of the whole network. As for the format of the feature number, in practical applications, the area code and the user number are generally coded in a character string format in sequence.

At the beginning of the system shown in Figure 1 being put into use, the routing service device needs to actively request its routing information from all softswitch devices, and then actively report the routing information through the softswitch device, and the routing service device registers and synchronizes the reported information (by broadcasting completed), to realize the maintenance of call routing information. Through the maintenance of routing information, each routing service device is configured with the current routing information of all users in the control domain of all softswitch devices it serves, and the user routing information that actually exists in the routing service device is actually a record. The recorded information includes at least: the user's characteristic number (area code + user number), and the routing information of the softswitch device where the user is currently located. The routing information of the softswitch device mentioned here refers to the information that can uniquely identify a softswitch device , such as an IP address.

In this embodiment, the reporting of routing information can be completed through the LDAP protocol between the routing service device and the soft switch, and the routing query between the routing service devices also uses the data access protocol between the soft switch and the routing service device to realize the step-by-step connection of the query . The synchronization of routing information between routing service devices can be accomplished through the TRIP protocol.

The method disclosed in the patent application No. 200210112905.X can be used for the method of routing information maintenance and query, but the present invention is not limited to the method in this application.

In this embodiment, the method for implementing the cross-region number portability service through the routing service device includes processes such as mobile phone transfer, the mobile phone user as the called party, and the mobile phone user as the calling party. As shown in Figure 3, the mobile phone flow process includes the following steps:

Step 100, after the user moves across regions, the moved-out and moved-in softswitches report the routing change information of the user to the routing service device of its parent node respectively, and the reported routing information includes the user's characteristic number, the ID of the softswitch where the user is located. Routing information and operation type, the operation type is used to distinguish whether the user is moving in or out of the softswitch device;

Step 110, the softswitch equipment that the user moves in sets up the relevant information of this user with the characteristic number of this user; (this characteristic number is carried by the user, does not change along with the mobile phone)

Step 120, the routing service device that receives the reported information updates the routing information table accordingly according to the reported information, and simultaneously synchronizes the routing change information to the parent node and the specified routing service device at the same level (or not specified);

After this step, the information of the softswitch where the user is currently located is saved in the routing service device serving the user.

After the user moves the phone, the original characteristic number is used as the call routing process when the called party includes the following steps: (Figure 4 shows the actual process when the calling party and the called party are not in the same area)

Step 200, other users dial the characteristic number of the mobile phone user to initiate a call to it;

Step 210, the softswitch equipment where the calling party is located searches whether there is the information of the mobile user according to the feature number, if yes, completes the connection locally, otherwise initiates a routing query request to the routing service device of its parent node, and the request contains the mobile user's feature number;

Step 220, the routing service device that receives the query request searches the record of the mobile user in the routing information table according to the feature number therein, and returns the found routing information of the mobile user's current softswitch to the main The softswitch device where the call is located;

Step 230, after the softswitch equipment where the calling party is located obtains the information of the softswitch equipment where the mobile user is located, an ordinary call flow is established with the softswitch equipment where the mobile user is located;

Step 240, after receiving the call, the softswitch device where the mobile user is located finds the information of the mobile user and connects the call directly.

In above-mentioned step 200, to the user of the softswitch device corresponding to the area code in the characteristic number of the mobile user, when dialing the mobile user, the area code may not be dialed, and the user number is directly dialed. When the softswitch device processes, it can Automatically add your own area code before the called user number, and combine it into the called user's characteristic number for query, and the subsequent call routing process is the same.

In the above step 220, if the called party is not in the service domain of the routing service device that received the query request, the routing server will continue to query its parent node, and may need to go through multi-level routing service device queries to get the desired query result.

When the user uses the original feature number as the calling party after moving the phone, the call flow is the same as that of an ordinary user. The call routing process has nothing to do with whether the user moves the phone or not, and will not be detailed here. In fact, when being called or received, the processing flow of the system is the same.

Please refer to Fig. 2 below, by the method for the embodiment of the present invention, when the user A1 in the softswitch SS1 moves to another softswitch SS2, the softswitch SS1, SS2 needs to automatically change the routing information of the user ( The feature number, the routing information of the softswitch where it is located, and the operation type) are reported to the routing service device RS1 that provides routing services for it;

Softswitch SS2 uses the characteristic number of A1 to establish the relevant information of user A1;

When the routing service device RS1 receives the routing information change reported by the softswitches SS1 and SS2, it needs to update the routing record of the user A1 in the routing information database, and at the same time synchronize the routing change information to the routing service device RS3. Here, it is assumed that RS2 is not RS1 The specified peer routing service device.

Although RS1 needs to receive the reported information from SS1 and SS2 respectively, the operation type of the information reported by SS1 is corresponding to the move-out, and the operation type of the information reported by SS2 is corresponding to the move-in. Move out the corresponding reported information, and update it only when the node in the original record is the same as the node in the reported information (that is, only update the routing information previously reported by this node), otherwise do not do any operation; The corresponding reported information can be updated as long as the recorded information is different from the reported information. Therefore, it can be guaranteed that the routing information in the routing service device is the current routing information of the mobile user.

Then, analyze the call flow after the transfer is completed:

Mobile user as calling party

User A1 is the calling party to call user B1. Since both user A1 and user B1 belong to the same softswitch SS2, they belong to the intra-domain call, and the call can be connected under the control of the softswitch SS2.

User A1 is the calling party to call user A2. Since user A1 and user A2 belong to different softswitch users at this time, they belong to cross-domain calls. SS2 needs to request the routing service device RS1 to inquire about the softswitch device where user A2 is located. Routing information, A2 is within the service range of RS1, RS1 can find out that the softswitch device where A2 is located is SS1, and return the routing information of SS1 to SS2, after SS2 obtains the routing information, it transfers the call to the softswitch device SS1. The call is completed under the control of the switching device SS1.

callee

User B1 is the calling party to call user A1. Since both user B1 and user A1 belong to the same softswitch SS2, they belong to the intra-domain call, and the call can be connected under the control of the softswitch SS2.

User A2 is the calling party to call user A1, because user A1 has moved out of softswitch SS1 at this time, and user A2 belongs to different softswitch users, so SS1 needs to request the routing service device RS1 to query the current location of user A1 The routing information of the softswitch equipment, A1 is still within the service range of RS1 after relocation, RS1 can find out that the softswitch equipment where A1 is located is SS2, and return the routing information of SS2 to SS1, after SS1 obtains the routing information, it will call Go to the soft switch SS2, and complete the call under the control of the soft switch SS2.

User C1 is the calling user to call user A1. At this time, user C1 belongs to the user of soft switch SS3, and user A1 belongs to the user of soft switch SS2. Query the routing information of the softswitch equipment where the called user A1 is currently located, but because the softswitch equipment SS1 where the user A1 is located and the softswitch equipment SS3 where the user C1 is located belong to different routing service devices RS1 and RS2, so in the routing service device The routing information of the softswitch device where user A1 is currently located cannot be found on RS2, so RS2 continues to query the routing service device RS3 of the parent node. A1 is within the service range of RS3, and RS3 can find the softswitch device SS2 where user A1 is currently located. The routing information of SS2 is returned to SS3 via RS2. After SS3 obtains the routing information, it transfers the call to the softswitch SS2, and completes the call under the control of the softswitch SS2.

The whole network number portability service of the present invention can be described by following examples:

If there is a user in Nanjing, the number is: 2871410, the area code of Nanjing is 025, and the characteristic number of this user is 0252871410.

If there is no mobile phone transfer, Nanjing users can dial 2871410 directly to dial this user, and users in other areas (such as Shanghai users) dial this user, dial 0252871410.

If the user in Nanjing moves to Beijing, assuming that Beijing also has a user number of 2871410, at this time, the user in Nanjing can still dial 2871410 directly when dialing this user, and the user in other areas (such as a user in Shanghai) dials this user, then dial 0252871410, and Beijing users also dial 0252871410 to dial this user, so as to distinguish Beijing users from dialing local users 2871410.

In addition, the reported information may also include the network type of the mobile user before the mobile transfer, so that the routing service device can save the network information of the user before the mobile transfer.

Claims (5)

1. A method for realizing the number portability service of the whole network through a routing service device, which is applied to a softswitch device as a bottom node and connected to at least one routing service device, and a routing service device as a node above the second layer and connected to at least one child node In a layered mesh system, the following steps are involved: (a) When numbering, combine the user number and area number into a unique user characteristic number; (b) After the user moves across regions, the moved-out and moved-in softswitches report the routing change information of the user to the routing service device of its parent node respectively, and the reported information includes the user's characteristic number, the route of the softswitch where the user is located information and type of operation; (c) The softswitch equipment that the user moves into establishes the relevant information of the user with the characteristic number of the user; (d) The routing service device that receives the reported information updates the routing information table accordingly according to the reported information, and simultaneously synchronizes the routing change information to the parent node and the designated routing service device at the same level; (e) When other users call the mobile user, if the calling party has the characteristic number of the mobile user in the softswitch equipment, the connection is completed locally; otherwise, a route query request is initiated to the routing service device of its parent node, and the request includes Have the characteristic number of the mobile phone user; (f) The routing service device that receives the query request searches for the record of the mobile user in the routing information table according to the characteristic number of the mobile user, and after obtaining the query result, the route of the softswitch where the mobile user is currently located The information is returned to the softswitch device where the caller is located; (g) After the softswitch equipment where the calling party is located obtains the routing information of the softswitch equipment where the mobile user is currently located, establish a call flow with the softswitch equipment where the mobile user is located; (h) After receiving the call, the softswitch where the called user is located finds the information of the mobile user and connects the call directly. 2. method as claimed in claim 1, it is characterized in that, in described step (a), to the user of the softswitch equipment corresponding to area number in mobile user characteristic number, when dialing this mobile user, only dial Described user number, when this soft exchange equipment is processed, automatically adds own area code before the called user number, is combined into the characteristic number of mobile phone user and is used for inquiry, and the user of other soft exchange equipment calls this mobile phone If you are a user, you must dial the feature number of the mobile user. 3. method as claimed in claim 1, is characterized in that, in described step (f), when the routing service device that described receiving query request does not find the record of described mobile user in routing information base, Continue querying to its parent node. 4. The method according to claim 1, characterized in that, between the routing service device and the softswitch device, the same protocol is used between the routing service device to complete the reporting and querying of routing information. 5 . The method according to claim 1 , wherein the reported information further includes the type of the network where the mobile user was before the mobile migration. 6 .

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