CN101984687A

CN101984687A - Method and system for implementing virtual private network (VPN) intelligent service number portability as well as service control point

Info

Publication number: CN101984687A
Application number: CN2010105119131A
Authority: CN
Inventors: 侯智荣
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2010-10-12
Filing date: 2010-10-12
Publication date: 2011-03-09
Anticipated expiration: 2030-10-12
Also published as: WO2012048543A1; CN101984687B

Abstract

The invention discloses a method and a system for implementing virtual private network (VPN) intelligent service number portability as well as a service control point (SCP). The system comprises the SCP and switching equipment, wherein the SCP comprises a storage module, a query module and a call connection module. The method comprises the following steps: when a number requiring number portability changes a signing network, the SCP on the original signing network registers the first correspondence between the number and the location routing number (LRN) of the new signing network; and when the VPN service of a calling party belonging to the SCP is triggered by first switch equipment, the SCP determines whether the called party changes a signing network according to whether the LRN corresponding to the called number can be inquired locally or not, and then the switch equipment continues to call according to the inquired result. By using the invention, signaling links are saved, and the problem that the current intelligent number portability technical scheme can not analyze user short number is solved, therefore, the invention has very high economic value and technical value.

Description

Method, system and service control point for realizing VPN intelligent service number portability

Technical Field

The invention belongs to the technical field of mobile intelligent networks, and particularly relates to a method and a system for realizing number portability of a VPN intelligent service and a service control point.

Background

The mobile intelligent network system is used as a new business service network in the mobile communication industry, can conveniently, flexibly, economically and effectively provide various value-added services, and can provide higher-quality, timely and humanized services for users through integration with a business system, a customer service center, a short message center and a bank system. The mobile intelligent network system is one of the great service growth points of telecom operators.

A Virtual Private Network (VPN) service is an intelligent Network service with a very wide application. The business is targeted to group customers, such as enterprises, groups, schools, hospitals, government offices, and the like. After applying for the service, the group can make a short number numbering scheme in the group according to the characteristics of the group, and the aim is to facilitate memory and management. The short number can uniquely identify a group member (including information of position, work number and the like), and the numbering scheme of the short number can not be influenced when the real number of the group member is changed, so that staff in the group cannot influence the working contact due to the change of the real number of the mobile terminal, and users in the group can find the users which the users want to find by remembering the short number in the group. In addition, calls can be classified in detail according to their information: for example, a call made between members in the same group is called a call in a VPN network; one group can also be established with one or more groups of small units to form a closed user group, and the call generated among the users in the closed user group is called as the call of the closed user group in the VPN network; a group can also set some important outside network clients, which form an outside network number group, and the call when calling the outside network number group is called as a VPN outside network number group call. The service can give a great degree of preference to calls in a VPN network, closed user group calls in the VPN network, number group calls outside the VPN network and ordinary outside network calls according to different call types, so that the communication cost of group users using the service is reduced. For operators, the service attracts large group customers and can realize good profit. Therefore, the service can not only reduce the communication cost of the group and facilitate the use of the staff in the group, but also enable the operator to attract a large number of group customers and better realize the profit. These characteristics make the service widely available.

With the development of telecommunication networks and the increase of telephone popularity, the demand of users for telecommunication services is higher and higher, and the demand of number portability (number portability) is also a service which is interested and implemented in all countries in the world in recent years, so that the user can continuously use the original number without changing the number when changing the service provider and changing the service due to address relocation, and the number portability service is popular with the users. Particularly, commercial users, enterprise users and government users do not need to change numbers when changing office places, and complicated work such as changing business cards is avoided. The portability of the internet number is such that the user may not change the number when changing operating companies for various reasons. The portability of internet numbers in a competitive environment promotes competition among operators. By 5 months of 2004, there are about 23 countries and regions around the world that implement number portability services (including fixed number portability services and mobile number portability services) to varying degrees. Of the 23 countries and regions where number portability has been implemented, more than half of them implement number portability services in both the fixed and mobile phone markets.

In summary, for the mobile intelligent network VPN user, after the number portability occurs, the original VPN service can still be used, and the original long number and short number are used to make a call, without changing the use experience of the user who has the number portability and other users in the group, and at the same time, providing accurate charging for the user, which is a technical problem to be solved urgently. However, in terms of the technical solutions published so far, the problem of Number Portability of the VPN service in the mobile intelligent network is mostly solved by using a method of inquiring Number Portability user address routing information by interacting with a network element NPDB (Number Portability Database) during a call. When the method calls, signaling interaction between the SCP (Service Control Point) and the NPDB is needed, a signaling link is occupied, and the calling efficiency is reduced. And because the NPDB cannot analyze the short number of the user, the number portability problem of the VPN service cannot be solved.

Disclosure of Invention

The invention aims to provide a method, a system and a service control point for realizing number portability of VPN intelligent service, so as to solve the defect of low calling efficiency after the number portability of the existing VPN service.

In order to solve the above problems, the present invention provides a method for implementing number portability of VPN intelligent service, which is suitable for a calling process in which a mobile Virtual Private Network (VPN) user having number portability participates, and includes:

when a number carries and changes a signed network, registering a first corresponding relation between the number and a routing address number (LRN) of a new signed network on a Service Control Point (SCP) of an original signed network;

when the VPN service on the attributive SCP of the calling participant is triggered by a switching device, the SCP determines whether the called party changes the signed network according to whether the LRN corresponding to the called number can be inquired locally, and then the current call is continued through the switching device according to the inquiry result.

Further, the method specifically comprises:

when a VPN service on a first SCP to which a calling number belongs is triggered by a first switching device of a network where the calling number currently belongs, the first SCP determines whether a signed network is replaced by a called party according to whether an LRN corresponding to the called number can be inquired locally or not, and then according to the inquiry result, the current call is connected to a second switching device of the current signed network of the called party through the first switching device;

when the VPN service on the second SCP to which the called number belongs is triggered by the second switching equipment, the second SCP determines whether the called party changes the signed network according to whether the LRN corresponding to the called number can be inquired locally, and then the current call is connected to the called party through the second switching equipment according to the inquiry result.

Further, the above method may also have the following features:

the called number or the calling number is a mobile subscriber integrated services digital network (MSIDSN) number of the called or the calling or a short number corresponding to the MSISDN number.

Further, the above method may also have the following features:

the step of the first SCP connecting the current call to a second switching device of the called current subscription network through the first switching device according to the query result specifically includes:

the first SCP sends the current call carrying the called number to the first switching equipment, and carries the LRN in the current call under the condition that the LRN corresponding to the called number is inquired locally;

if the first switching equipment judges that the received current call carries the LRN, the first switching equipment continues the current call to switching equipment of a network corresponding to the LRN; otherwise, the current call is connected to the switching equipment of the network where the first SCP is located.

Further, the above method may also have the following features:

when VPN traffic on the first SCP is triggered by the first switching device, the method further comprises:

the first SCP determines whether the calling party changes the signed network according to whether the LRN corresponding to the calling number can be inquired locally or not, then judges whether the current signed network of the calling party obtained according to the inquiry result is the same as the inquired current signed network of the called party, and if so, selects an in-network charging scheme of the group user for the calling party; otherwise, selecting the inter-network charging scheme of the group user for the calling party;

the step of the first SCP continuing the current call to the switching device through the first switching device specifically includes: the first SCP calculates the available calling time length of the calling party according to the selected charging scheme and the account balance of the calling party; and when the available call duration is greater than zero, the first SCP connects the current call to the second switching equipment through the first switching equipment.

Further, the above method may also have the following features:

when VPN traffic on the second SCP is triggered by the second switching device, the method further comprises:

the second SCP determines whether the calling party changes the signed network according to whether the LRN corresponding to the calling number can be inquired locally or not, then judges whether the current signed network of the calling party obtained according to the inquiry result is the same as the inquired current signed network of the called party, and if so, selects a group user intra-network charging scheme for the called party; otherwise, selecting a charging scheme among group user networks for the called party;

the step of the second SCP continuing the current call to the called party through the second switching device specifically includes: the second SCP calculates the available call duration of the called party according to the selected charging scheme and the account balance of the called party; and when the available call duration is greater than zero, the second SCP connects the current call to the called party through the second switching equipment.

Further, the method may further include:

when a number carries and changes the signed network, registering a second corresponding relation between the former N digits in a new charging number consisting of the LRN of the new signed network of the number and the MSISDN corresponding to the number, the identification information of the new signed network and the identification information of the newly signed charging area on the SCP of the original signed network; wherein, N is the number digit needed by the attribution network identification and attribution charging area for judging MSISDN number preset in SCP of the original signed network;

when the first SCP and/or the second SCP select the charging scheme for the corresponding calling party, under the condition that the LRN number corresponding to the calling party number is inquired locally, the character string consisting of the corresponding LRN number and the MSISDN number of the calling party is used as a new charging number of the calling party, then the identification information of a new subscription charging area corresponding to the charging number is inquired according to the second corresponding relation, and the charging scheme of roaming or local communication is correspondingly selected for the calling party user according to the information and the current location of the calling party user.

Further, the above method may also have the following features:

when the call is finished, the first switching device and/or the second switching device correspondingly sends a call finishing message carrying the call duration to the first SCP or the second SCP; and the first SCP or the second SCP calculates the charge of the call of the corresponding call participant according to the selected charging scheme, the received call duration and other charging related information.

The invention also provides a system for realizing the number portability of the VPN intelligent service, which comprises the following steps: a Service Control Point (SCP) and a switching device;

the SCP is used as the SCP of a home network for carrying and replacing the number of the signed network, and is used for registering a first corresponding relation between the number and a routing address number (LRN) of a new signed network; when the Service Control Point (SCP) is used as a calling participant and the VPN service on the SCP is triggered by the switching equipment, whether the called party changes a signed network is determined according to whether the LRN corresponding to the called number can be inquired locally, and the current call is sent to the switching equipment according to the inquiry result;

the switching equipment is used for triggering VPN service on the attribution SCP; and also for continuing the received call.

Further, the above system may also have the following features:

when the Service Control Point (SCP) which is used as a calling number attribution in a calling process participated by a mobile Virtual Private Network (VPN) user with number portability is used, when a VPN service on the SCP is triggered by a first switching device of a network where the calling number is currently located, whether a signed network is changed by a called party is determined according to whether an LRN corresponding to the called number can be inquired locally, and then the current calling is connected to the first switching device according to the inquiry result; when the SCP is used as the called number attribution and the VPN service on the SCP is triggered by a second switching device of the same network, whether the called number changes the signed network is determined according to whether the LRN corresponding to the called number can be inquired locally, and then the current call is connected to the second switching device according to the inquiry result;

the switching device is used for connecting the current call sent by the SCP to the second switching device of the current signed network of the called party when the switching device is used as the switching device of the current network of the calling party; when the SCP is used as the switching equipment of the called current signed network, the SCP is used for connecting the current call sent by the SCP to the called.

Further, the above system may also have the following features:

when the SCP is used as the SCP to which the calling number belongs, the SCP is also used for determining whether the calling party changes the signed network or not according to whether the LRN corresponding to the calling number can be inquired locally or not, then judging whether the current signed network of the calling party obtained according to the inquiry result is the same as the inquired current signed network of the called party or not, and if so, the SCP is also used for selecting an in-network charging scheme of a group user for the calling party; otherwise, it is also used to select the charging scheme between networks of group users for the calling party; the system is also used for calculating the available calling time length of the calling party according to the selected charging scheme and the account balance of the calling party; when the available call duration is greater than zero, the method is also used for connecting the current call to the first switching equipment.

Further, the above system may also have the following features:

the SCP is also used for determining whether the calling party changes the signed network or not according to whether the LRN corresponding to the calling number can be inquired locally or not when the SCP is used as the SCP of the called party current signed network, then judging whether the calling party current signed network obtained according to the inquiry result is the same as the inquired called party current signed network or not, and if the calling party current signed network is the same as the inquired called party current signed network, selecting a group user intra-network charging scheme for the called party; otherwise, it is also used to select the charging scheme among group users for the called party; the system is also used for calculating the available call duration of the called party according to the selected charging scheme and the account balance of the called party; and when the available call duration is greater than zero, the method is also used for switching the current call to the second switching equipment.

Further, the above system may also have the following features:

the switching equipment is also used for sending a call ending message carrying the call duration to the corresponding same network SCP when the call is ended; and the SCP calculates the cost of the call of the corresponding call participant according to the selected charging scheme, the received call duration and other charging related information.

The invention also provides a Service Control Point (SCP) for realizing the carrying of the VPN intelligent service number, which comprises the following steps: the device comprises a storage module, an inquiry module and a call connection module;

the storage module is used for storing a first corresponding relation between the number and a routing address number (LRN) of a new signed network when the SCP is used as the SCP of a home network of the number carrying and replacing the signed network;

the query module is used for determining whether the called party changes the signed network according to whether the LRN corresponding to the called number can be queried locally or not when the SCP is used as a home SCP of a call participant and a VPN service on the SCP is triggered by a switching device;

the call continuing module is used for sending the current call to the switching equipment according to the query result queried by the query module.

Further, the SCP may also have the following features:

the query module is specifically configured to, when the SCP is the SCP to which a calling number belongs in a calling process in which a mobile Virtual Private Network (VPN) user having a number portability occurs, determine whether the called party changes a subscription network according to whether an LRN corresponding to the called number can be queried in the storage module when a VPN service on the SCP is triggered by a first switching device of a network where the calling party is currently located; the system is also used for determining whether the called party changes the signed network or not according to whether the LRN corresponding to the called number can be inquired locally or not when the SCP is used as the SCP of the called number home network and the VPN service on the SCP is triggered by a second switching device of the same network;

the call connection module is specifically configured to connect the current call to the first switching device according to a query result obtained by the query module through querying when the SCP serves as an SCP to which the calling number belongs; and when the SCP is used as the SCP of the called current signed network, the current call is connected to the second switching equipment according to the query result obtained by the query module through query.

Furthermore, the SCP also comprises a charging module;

the query module is further configured to determine whether the calling party changes the subscription network according to whether the LRN corresponding to the calling number can be queried locally when the SCP serves as the SCP to which the calling number belongs;

the charging module is used for selecting an in-network charging scheme of a group user for the calling party when the SCP is used as the SCP to which the calling number belongs and the current signed network of the calling party obtained according to the query result is judged to be the same as the queried current signed network of the called party; when the two are different, selecting an internetwork charging scheme of the group user for the calling party; and the method is also used for calculating the available calling time length of the calling party according to the selected charging scheme and the account balance of the calling party.

Furthermore, the SCP also comprises a charging module;

the query module is further used for determining whether the calling party changes the signed network according to whether the LRN corresponding to the calling number can be queried locally or not when the SCP is used as the SCP of the called party's current signed network;

the charging module is used for selecting a group user network charging scheme for the called party when the SCP is used as the SCP of the called party current signed network and the calling party current signed network obtained according to the query result is judged to be the same as the queried called party current signed network; when the two are different, selecting a charging scheme among the group user networks for the called party; and the system is also used for calculating the available call duration of the called party according to the selected charging scheme and the account balance of the called party.

Further, the SCP may also have the following features:

the storage module is also used for registering a second corresponding relation between the former N digits in a new charging number consisting of an LRN of a new contract signing network with a number carrying and replacing a contract signing network number and an MSISDN corresponding to the number, and the identification information of the new contract signing network and the identification information of a newly signed charging area when the SCP is used as the SCP to which the calling number belongs; wherein, N is the number digit needed by the attribution network identification and attribution charging area for judging MSISDN number preset in SCP of the original signed network;

the charging module is used for taking a character string consisting of the corresponding LRN number and the MSISDN number of the calling participant as a new charging number of the calling participant under the condition that the query module on the same SCP queries the LRN number corresponding to the calling participant number, then querying the identification information of a new subscription charging area corresponding to the charging number according to the second corresponding relation, and correspondingly selecting a charging scheme of roaming or local conversation for the calling participant user according to the information and the current location of the calling participant user.

Further, the SCP may also have the following features:

the charging module is also used for calculating the charge of the call of the corresponding call participant according to the selected charging scheme, the call duration received from the same network switching equipment and other charging related information.

After the invention is adopted, the number portability charging of the VPN user can be realized only by simply modifying the existing VPN intelligent service and charging system. Meanwhile, the SCP and NPDB signaling interaction during calling is avoided, signaling links are saved, the problem that the short number of the user cannot be analyzed by the existing intelligent network number portability technical scheme is solved, and the intelligent network number portability method has high economic value and technical value.

Drawings

FIG. 1 is a block diagram of an SCP in an embodiment of the present invention;

FIG. 2 is an overall flow chart of a service call in an embodiment of the present invention;

FIG. 3 is a flow chart of a caller in an embodiment of the present invention;

FIG. 4 is a flow chart of calling flow charging scheme selection in the embodiment of the present invention;

FIG. 5 is a called flow chart in an embodiment of the present invention;

fig. 6 is a flow chart of selecting a charging scheme of a called flow in the embodiment of the present invention.

Detailed Description

The following describes the implementation method and charging method of the present invention with specific embodiments.

As shown in fig. 1, the SCP of the present invention at least includes: the device comprises a storage module, an inquiry module and a call connection module;

the query module is used for determining whether the called party changes the signed network according to whether the LRN corresponding to the called number can be queried in the storage module when the SCP is used as the attributive SCP of the call participant and the VPN service on the SCP is triggered by the switching equipment;

the call connection module is used for sending the current call to the switching equipment according to the query result queried by the query module.

The query module is specifically configured to determine whether the called party changes the subscription network according to whether the LRN corresponding to the called number can be queried in the storage module when the VPN service is triggered by the first switching device of the network where the calling party is currently located when the SCP serves as an SCP to which the calling number belongs in a calling process in which a VPN user having a number portability occurs participates; the system is also used for determining whether the called party changes the signed network or not according to whether the LRN corresponding to the called number can be inquired locally or not when the SCP is used as the SCP of the called number home network and the VPN service on the SCP is triggered by a second switching device of the same network;

the call connection module is specifically used for connecting the current call to the first switching equipment according to the query result obtained by the query module through query when the SCP is used as the SCP to which the calling number belongs; and when the SCP is used as the SCP of the called current signed network, the current call is connected to the second switching equipment according to the query result obtained by the query module through query.

In addition, the SCP can also comprise a charging module;

the query module can also be used for determining whether the calling party changes the signed network according to whether the LRN corresponding to the calling number can be queried locally when the SCP is used as the SCP to which the calling number belongs;

the charging module is used for selecting an in-network charging scheme of the group user for the calling party when the SCP is used as the SCP to which the calling number belongs and the current signed network of the calling party obtained according to the query result is judged to be the same as the queried current signed network of the called party; when the two are different, selecting the inter-network charging scheme of the group user for the calling party; and the method is also used for calculating the available calling time length of the calling party according to the selected charging scheme and the account balance of the calling party. Or,

the query module can be also used for determining whether the calling party changes the signed network or not according to whether the LRN corresponding to the calling number can be queried locally or not when the SCP is used as the SCP of the called party's current signed network;

the charging module is used for selecting a group user in-network charging scheme for the called party when the SCP is used as the SCP of the called party current signed network and the calling party current signed network obtained according to the query result is judged to be the same as the queried called party current signed network; when the two are different, selecting a charging scheme among the group user networks for the called party; and the system is also used for calculating the available call duration of the called party according to the selected charging scheme and the account balance of the called party.

The storage module can also be used for registering a second corresponding relation between the former N digits in a new charging number consisting of an LRN of a new signed network with the number carrying and replacing the signed network and an MSISDN corresponding to the number, the identification information of the new signed network and the identification information of a newly signed charging area when the SCP is used as the SCP to which the calling number belongs; wherein, N is the number digit needed by the attribution network identification and attribution charging area for judging MSISDN number preset in SCP of the original signed network;

the charging module is used for taking a character string consisting of the corresponding LRN number and the MSISDN number of the calling participant as a new charging number of the calling participant under the condition that the query module on the same SCP queries the LRN number corresponding to the calling participant number, then querying the identification information of a new subscription charging area corresponding to the charging number according to a second corresponding relation, and correspondingly selecting a roaming or local call charging scheme for the calling participant user according to the information and the current location of the calling participant user.

The charging module can also be used for calculating the charge of the call of the corresponding call participant according to the selected charging scheme, the call duration received from the same network switching equipment and other charging related information.

Preferably, the function of the storage module may be implemented by an SMAP (Service Management Access Point), and the function of the storage module and the module may be implemented by a VPN Service logic.

The method for realizing the number portability of the VPN intelligent service is suitable for GSM intelligent networks and CDMA intelligent networks. The method is applied to the calling process participated by the VPN user with number portability, and comprises the following steps:

1) when a Number carries and changes a signed network, registering a first corresponding relation between the Number and a Routing address Number (LRN) of a new signed network on an SCP (service control point) of an original signed network (namely a home SCP of the Number);

2) when the VPN service on the call participant's home SCP is triggered by a Switching device (e.g., MSC (Mobile Switching Center)), the SCP determines whether the called party changes the subscription network according to whether the LRN corresponding to the called number can be queried locally, and then continues the current call through the Switching device according to the query result.

The call participant refers to a calling party or a called party participating in the call, and the number refers to an MSISDN (Mobile Subscriber Integrated services digital network) number or a short number corresponding to the MSISDN number.

When the call is finished, the exchange equipment sends a call finishing message carrying the call duration to the call participant attribution SCP; the attribution SCP calculates the charge of the call according to the selected charging scheme, the received call duration and other charging relevant information.

Specifically, the call flow of the present invention is as follows:

s01: when a number is carried, registering the corresponding relation between the number carried and the LRN carried into the network (namely a new signing network) in a database used for storing VPN service data on a number attribution SCP;

s02: the number analysis configuration aiming at the LRN is carried out at the MSC side, so that when a user carrying the number is taken as a called party, the MSC of the network where the calling party is currently located can route the call to the switching equipment (such as the MSC of a mobile network) which is carried into the network by the user according to the local configuration;

s03: in the calling process, when the VPN service on the calling participant attribution SCP is triggered by the switching equipment, the attribution SCP inquires whether the LRN corresponding to the number is stored in a local database according to the long/short numbers of the calling party and the called party;

s04: determining the signed network of the current calling and called parties according to the query result, and selecting a group user in-network charging scheme for the calling and called parties if the two networks are signed on the same network; otherwise, selecting group user network external charging scheme for the calling and called party;

s05: according to the length of the mobile access number configured by the charging system, intercepting string1 with corresponding length as the access number from the character string (LRN + user MSDSN); according to the length of HLR (Home Location Register) number section configured by the charging system, intercepting the corresponding length in the character string left after string1 is removed from the character string (LRN + user MSDSN) as HLR number section string 2; configuring a home charging area number corresponding to string1+ string2 in the charging system;

the MSISDN number of a mobile subscriber is the number dialed when calling a called subscriber in a digital public land cellular mobile communications network, and consists of the national number and the domestic effective ISDN number. The national number of China is 86, the domestic effective ISDN number is an equal-length number containing 11 digits, and the structure is as follows: n is a radical of₁N₂N3₃+H₀H₁H₂H₃+ ABCD. Wherein，N₁N₂N3₃The mobile access number is used for identifying different mobile systems, such as the current mobile access number is 135-139, and the communication is 130-131; h₀H₁H₂H₃These four bits represent the HLR identification number, where H is₁H₂Uniformly distributed by the whole country, H₃Distributed by each province. One HLR can correspond to one or several H₁H₂H₃A numerical value; ABCD is the number of mobile user in each HLR, and is distributed by each HLR.

In the charging system, N1N2N3 is used to represent the subscription network of the user, and H0H1H2H3 represents the home HLR of the user. N1N2N3H0H1H2H3 also uniquely identifies the user's home charging area number. These are therefore all necessary for billing and the billing system will analyze these to determine how to bill.

S06: the MSISDN number of the call participant and the corresponding LRN number (in the case of locally saving the LRN number) are sent to the charging module in the SCP together with the charging scheme selected in step S04, and the charging module performs charging control (i.e. performs calculation of available call duration);

s07: SCP makes call connection through the MSC according to the result of charging control (i.e. making call connection when the calculated available call time is not 0, and prompting the calling party and ending the call when the calculated available call time is 0), the connected called number needs to be provided with corresponding LRN information, and the MSC connects the call to the corresponding network according to LRN;

s08: when the call is finished, the MSISDN number and the corresponding LRN number of the call participant are sent to the charging module together with the charging scheme selected by S04, and the charging module charges the MSISDN number and the corresponding LRN number;

s09: the SCP deducts the call charge from the account of the call participant according to the charging result, and outputs a CDR (Call Detail Records) call list which contains the LRN corresponding to the Calling party and the called party participating in the call, so that the BOSS (Business & Operation Support System) collects the call list for the charge settlement among different network operators.

The following uses an application example of the present invention to further explain various corresponding relations to be configured on the SCP.

After a number portability of a VPN subscriber occurs in network a, the subscriber data stored in the SCP of the network is shown in the following table, where the LRN may contain letters and numbers.

TABLE 1 subscriber data stored on SCP in network A

The a network in table 1 is the network where the VPN service is located.

Further, as shown in table 2, the database of the SCP may be configured with a corresponding relationship between the LRN and the network, and then in step S04, the SCP may determine whether the call belongs to an intra-network call or an inter-network call according to the current home networks (i.e., the networks corresponding to the LRNs) of the calling and called parties, and the determination method is shown in table 3.

TABLE 2LRN to network correspondence

Network	Network LRN	Description of the invention
			A	Is free of	The A network, i.e. the network where the VPN service is located, has no routing code

B	D0801	D0801 is a routing code of a B network
			C	9801	9801 routing code for C network
D	8801	8801 routing code for D networks

TABLE 3 Intranet/internetwork Call description

Further, assuming that the length of the access number configured by the original charging system is 3 and the length of the HLR number segment is 4, the following configuration is required in the database of the SCP as described in step S05. The configuration relationship is shown in table 4:

TABLE 4 correspondence between subscriber number and home zone number

The following two application examples are used to further explain the call flow when the user with number portability is used as the calling party and the called party.

Calling process of using number portability-generating user as calling party in application example

Assume that the MSISDN number of USER-1 is 8613905190600 and the MSISDN number of USER-2 is 8613905190603. As shown in table 1, user 1 carries the number portability, and carries the number portability to network B, whose LRN is D0801; user 2 belongs to the a network and no number portability occurs. As shown in fig. 3, when the user 1 dials the short number 61003 of the user 2, the process of the user 1 as the calling party mainly includes the following steps:

s3-01: the VPN service on the SCP of the current signed network of the calling user is triggered by the MSC at the calling location;

s3-02: SCP inquires LRN corresponding to calling and called number in local database, and selects charging scheme for calling user according to inquiry result;

s3-03: SCP sends the selected charging scheme, called number, LRN added calling number, current position information of calling user and balance of calling user to charging module, which calculates available calling time of calling user;

s3-04: SCP judges whether the called user has number portability according to whether the LRN corresponding to the called number is stored in the database;

s3-05: if the LRN corresponding to the called number is not stored in the database, the SCP judges that the called number is not carried, the SCP performs call control, continues the call to the home MSC of the calling number, wherein the home MSC carries the calling number and the called number, and executes step S3-07;

s3-06: if the LRN corresponding to the called number is stored in the database, the SCP judges that the called number carries the number, and carries the calling number and the called number taking the corresponding LRN as the prefix;

s3-07: if the MSC judges that the called number has an LRN prefix, the MSC connects the call to the network corresponding to the LRN; otherwise, the call is connected to the home network of the called number.

In this embodiment, since the called number is not carried and the called number belongs to the carrying-out network of the calling number, the MSC will connect the call to the network.

S3-08: after the call is finished, SCP sends the selected charging scheme, the numbers of both calling parties added with LRN prefix, the position information of the calling user and the calling time to a charging module on the SCP, and the charging module calculates the calling charge of the calling user;

s3-09: SCP issues call ticket, which identifies the number carried information of both users and deducts the charge of this call from the account of the calling user.

In step S3-02, the process of selecting the charging scheme of the calling party, as shown in fig. 4, includes:

s4-01: the SCP queries the LRN and the clustering information and the closed subscriber group number corresponding to the calling subscriber according to the long number of the calling subscriber 1;

in this example, the query result indicates that calling party 1 has carried the number, and the LRN carried into the network is D0801.

S4-02: the SCP judges whether the called number is a long number or a short number. If the number is a long number, executing the step S4-03, otherwise executing the step S4-04;

in this example the calling subscriber calls the short number of the called subscriber, so the branch of step S4-04 is executed.

S4-03: the SCP inquires an LRN, group information and a closed subscriber group number corresponding to the called number according to the called long number, and then executes a step S4-05;

s4-04: the SCP inquires an LRN, group information and a closed subscriber group number corresponding to the called number according to the called short number;

in this example, if the LRN of the called subscriber 2 is empty, it is determined that the called subscriber 2 has no number portability.

S4-05: SCP judges whether LRN of calling and called user is same, if it is same, executing step S4-06, otherwise executing step S4-07;

s4-06: the SCP judges whether the calling party and the called party are the same group user according to whether the inquired group information of the calling party and the called party is the same. If yes, executing the step S4-08, otherwise executing the step S4-12;

s4-07: and the SCP judges whether the calling party and the called party are the same group user according to whether the inquired group information of the calling party and the called party is the same. If yes, executing the step S4-09, otherwise executing the step S4-13;

s4-08: and the SCP judges whether the calling party and the called party are the same closed subscriber group according to whether the inquired closed subscriber group numbers of the calling party and the called party are the same. If yes, executing step S4-10, otherwise executing step S4-11;

s4-09: and the SCP judges whether the calling party and the called party are the same as a closed subscriber group subscriber according to whether the inquired closed subscriber group numbers of the calling party and the called party are the same. If yes, executing step S4-14, otherwise executing step S4-15;

s4-10: SCP determines the calling type is the same closed user group calling and in-network calling, selects the charging scheme as the same closed user group and in-network calling charging scheme, and ends;

s4-11: SCP determines the calling type is common calling and in-network calling in the same group, selects charging scheme as common calling and in-network calling charging scheme in the same group, and ends;

s4-12: SCP judges whether the called number is the user of the group external number group where the calling is located, if yes, step S4-17 is executed, otherwise, step S4-16 is executed;

s4-13: SCP judges whether the called number is the calling group external number group user, if yes, executing step S4-18, otherwise executing step S4-19;

s4-14: SCP confirms this call type is the same closed user group call and internetwork call, selects charging scheme as the same closed user group and internetwork calling charging scheme, ends;

s4-15: SCP confirms this call type is common call and internetwork call in the same group, choose the charging scheme to be common call and internetwork calling charging scheme in the same group, finish;

in this example, the calling and called numbers are normal intra-group calls and are internetwork calls, so the S4-15 branch is performed.

S4-16: SCP determines the calling type is common group external number and calling in network, selects the charging scheme as common group external number and calling charging scheme in network, and ends.

S4-17: SCP determines the calling type is group external number group and calling in network, selects charging scheme as group external number group and calling charging scheme in network, and ends.

S4-18: SCP confirms that the calling type is group external number group and the calling is carried out between networks, selects the charging scheme as the group external number group and the charging scheme of the calling between networks, and ends.

S4-19: SCP confirms that the calling type is common group external number and the calling is carried out between networks, selects the charging scheme as common group external number group and the charging scheme of calling between networks, and ends.

Further, the calling and called numbers sent by S3-03, S3-08 to the billing module are:

since the calling party carries the number, the calling number sent to the charging module is LRN + calling MSISDN, i.e. D080113905190600. Since no number portability occurs in the called party, the called number sent to the billing module is called MSISDN 13905190603.

Calling process when user carrying number two as called party

Assume that the MSISDN number of subscriber 3 is 8613905190602 and the MSISDN number of subscriber 4 is 8613905190606. As shown in Table 1, both subscribers 3 and 4 have carried numbers, the network carried by network A is network D, and the LRN of network D is 8801. User 3 and user 4 are not the same group user. As shown in fig. 5, when the user 3 dials the long number 13905190606 of the user 4, the procedure of the user 4 as the called party mainly includes the following steps:

s5-01: the VPN service on the SCP of the home network of the called user is triggered by the MSC of the current signed network of the called user;

s5-02: the SCP inquires an LRN corresponding to the calling number and the called number in a local database, and selects a charging scheme for the called user according to the inquiry result;

s5-03: SCP sends the selected charging scheme, the numbers of both calling parties added with LRN prefix, the current position information of the called user and the balance of the called user to a charging module, and the charging module calculates the available calling duration of the called user;

s5-04: SCP judges whether the called user has number portability according to whether the LRN corresponding to the called number is stored in the database;

s5-05: if the LRN corresponding to the called number is not stored in the database, the SCP judges that the called number is not carried, the SCP performs call control, the SCP calls the MSC of the network, wherein the MSC carries the called number, and the step S5-07 is executed;

s5-06: if the LRN corresponding to the called number is stored in the database, the SCP judges that the called number carries out number portability, and then the SCP performs call control and continues to call the MSC of the network, wherein the called number with the corresponding LRN as the prefix is carried;

s5-07: if the called number has LRN prefix, MSC connects the call to the network corresponding to LRN; otherwise, the call is directly connected to the called user.

In this embodiment, since the called number carries, the MSC continues to call to the D network according to the LRN (i.e., 8801).

S5-08: after the call is finished, SCP sends the selected charging scheme, the numbers of both calling parties with LRN prefix, the position information of the called user and the time length of the call to a charging module on the SCP, and the charging module calculates the call cost of the called user;

s5-09: SCP issues call ticket, which identifies the number carried information of both users and deducts the charge of the called user in the account of the called user.

In step S5-02, the process of selecting the charging scheme for the called subscriber, as shown in fig. 6, includes:

s6-01: the SCP queries the LRN and the clustering information and the closed subscriber group number corresponding to the calling subscriber according to the long number of the calling subscriber 3;

in this example, the query result indicates that calling party 3 has carried the number, and the LRN carried into the network is 8801.

S6-02: and the SCP inquires a called routing code, group information and a closed subscriber group number according to the called long number.

The query result in this embodiment is that the LRN of the called subscriber 2 is 8801;

s6-03: SCP judges whether LRN of calling and called user is same, if it is same, executing step S6-04, otherwise executing step S6-05;

s6-04: the SCP judges whether the calling party and the called party are the same group user according to whether the inquired group information of the calling party and the called party is the same. If yes, executing step S6-06, otherwise executing step S6-10;

s6-05: and the SCP judges whether the calling party and the called party are the same group user according to whether the inquired group information of the calling party and the called party is the same. If yes, executing step S6-07, otherwise executing step S6-11;

s6-06: and the SCP judges whether the calling party and the called party are the same as a closed subscriber group subscriber according to whether the inquired closed subscriber group numbers of the calling party and the called party are the same. If yes, executing the step S6-08, otherwise executing the step S6-09;

s6-07: and the SCP judges whether the calling party and the called party are the same as a closed subscriber group subscriber according to whether the inquired closed subscriber group numbers of the calling party and the called party are the same. If yes, executing step S6-12, otherwise executing step S6-13;

s6-08: SCP determines the calling type is the same closed user group calling and the calling in network, selects the charging scheme as the same closed user group and the called charging scheme in network, and ends.

S6-09: SCP confirms the calling type is common calling and in-network calling in the same group, selects charging scheme as the charging scheme of common calling and in-network called in the same group, and ends.

S6-10: SCP judges whether the calling number is the called group external number group user, if yes, step S6-15 is executed, otherwise, step S6-14 is executed;

s6-11: SCP judges whether the calling number is called group external number group user, if yes, step S6-16 is executed, otherwise, step S6-17 is executed.

S6-12: SCP determines the calling type is the same closed user group calling and the internetwork calling, selects the charging scheme as the same closed user group and the internetwork called charging scheme, and ends.

S6-13: SCP determines the calling type is common calling and internetwork calling in the same group, selects the charging scheme as the charging scheme of common calling and internetwork called in the same group, and ends.

In this example, the calling and called numbers are normal intra-group calls and are internetwork calls, so the S6-13 branch is performed.

S6-14: SCP determines the calling type is common group external number and calling in network, selects charging scheme as common group external number and called charging scheme in network, and ends.

S6-15: SCP confirms the calling type is group external number group and calling in network, selects charging scheme as group external number group and called charging scheme in network, and ends.

S6-16: SCP confirms that the calling type is group external number group and the calling between networks, selects the charging scheme as group external number group and the called charging scheme between networks, and ends.

S6-17: SCP confirms that the calling type is common group external number and the calling between networks, selects the charging scheme as common group external number group and the charging scheme of called between networks, and ends.

Further, the calling and called numbers sent by S5-03, S5-08 to the billing module are:

since the calling party carries out number portability, the calling party number sent to the billing module is LRN + MSISDN 880113905190602.

Since the called party also carries out number portability, the called number sent to the charging module is the LRN + MSISDN 880113905190606.

It can be seen from the above that: the charging and the connection of the number portability can be realized according to the above mode by various calling types of the VPN service calling process and the called process. The embodiment of the invention only takes the calling and called flows as examples, and obviously, the unconditional forwarding and the conditional forwarding flows of the VPN service can also be realized by using the method. The general group internal calling, the general group external calling, the closed user group calling and the group external number group calling of the VPN calling can be realized according to the method of the invention. The method and the system can realize the charging of the number portability of the VPN user only by simply modifying the existing VPN intelligent service and charging system without adding new equipment. Therefore, the SCP and NPDB signaling interaction is avoided when calling, the signaling link is saved, the problem that the short number of the user cannot be analyzed by the existing intelligent network number portability technical scheme is solved, and the intelligent network number portability method has high economic value and technical value.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing the relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module/unit in the above embodiments may be implemented in the form of hardware, and may also be implemented in the form of a software functional module. The present invention is not limited to any specific form of combination of hardware and software.

Claims

1. A method for realizing VPN intelligent service number portability is suitable for a calling process participated by a mobile Virtual Private Network (VPN) user with number portability, and comprises the following steps:

2. The method according to claim 1, characterized in that it comprises in particular:

3. The method of claim 2, wherein:

4. The method of claim 2, wherein:

5. The method of claim 2, wherein:

6. The method of claim 2, wherein:

7. The method of claim 5 or 6, further comprising:

8. The method of claim 5 or 6, wherein:

9. A system for realizing VPN intelligent service number portability comprises: a Service Control Point (SCP) and a switching device;

10. The system of claim 9,

11. The system of claim 9, wherein:

12. The system of claim 9, wherein:

13. The system of claim 11 or 12, wherein:

14. A Service Control Point (SCP) implementing VPN intelligent service number portability, comprising: the device comprises a storage module, an inquiry module and a call connection module;

the query module is used for determining whether the called party changes the signed network according to whether the LRN corresponding to the called number can be queried in the storage module or not when the SCP is used as a home SCP of a call participant and a VPN service on the SCP is triggered by the switching equipment;

15. The SCP of claim 14 wherein;

16. The SCP of claim 15 further comprising a charging module;

17. The SCP of claim 15 further comprising a charging module:

18. An SCP as claimed in claim 16 or 17 characterised in that:

19. The SCP of claim 18 wherein: