CN115580597A - Addressing method and system for IMS user fall-back circuit domain - Google Patents

Abstract

The invention discloses an addressing method and system for an IMS user to fall back to a circuit domain, which comprises a processing module, a roaming number addressing module and a circuit domain, wherein the processing module is in signal connection with the circuit domain, senses that the IMS user is registered in the circuit domain and addresses the roaming number in the circuit domain; and the ENUM module is connected with the processing module and processes the query initiated by the IMS domain, and the ENUM module sends the query to the processing module and feeds back the query result. The invention directly or indirectly senses the position update of the user in the circuit domain, generates and manages corresponding dynamic data for the pre-screening purpose when the called party addresses the roaming number. The pre-screening query can greatly reduce the pressure of addressing roaming numbers in the circuit domain and reduce a large amount of invalid addressing of non-fallback users.

Description

Addressing method and system for IMS user fall-back circuit domain

Technical Field

The invention relates to the field of mobile communication, in particular to an addressing method and an addressing system for an IMS (IP multimedia subsystem) user fall-back circuit domain.

Background

In the era of 2G/3G mobile networks, the technical route is mainly divided into two major camps of 3GPP and 3GPP2, however, from 4G mobile networks, the 3GPP camps occupy the major market position. The 4G network is a pure packet domain data network, and its voice service is carried by the IMS network, i.e. VoLTE, which is different from the 2G/3G traditional circuit domain voice service. In order to ensure service continuity, the 4G EPC-HSS, the IMS-HSS and the 2G/3G HLR of the network which is struggled by the 3GPP are deployed in three modes. And the 3GPP2 formation network can only realize the fusion deployment of 4G EPC-HSS and IMS-HSS, and the separate deployment of HLR and HSS.

The HLR/HSS separate deployment network 4G subscribers still have a need to fall back to the 2G/3G circuit domain, such as international roaming. The prior international roaming implementation is shown in fig. 1. The GC gateway is a special network element, which plays the role of HLR in an overseas 3GPP (GMS/WCDMA) network and plays the role of VLR in a 3GPP2 (CDMA) network, thereby realizing the conversion of different mobile network MAP protocols. The 3GPP2 has a need to quit the original 3GPP2 (CDMA) network and a need to roam with the overseas 3GPP (GMS/WCDMA) network. A prerequisite for a fallback CDMA network is a decoupling from international roaming. The international roaming has independent HLR, and in order to solve the problem that the called voice service addresses the roaming number, the original IMS gateway MGCF needs to be modified into GMSC supporting GSM/WCDMA MAP protocol. The difficulty is that during the coexistence of HLRs of different networks, it is not possible for the GMSC to select which MAP protocol addresses HLRs of different networks, both inside and outside, at the same time, by a single number.

Disclosure of Invention

The invention aims to provide an addressing method and an addressing system for an IMS user fallback circuit domain, which are used for directly finishing circuit domain roaming number addressing of a called fallback user in an IMS domain based on an IMS call signaling flow without modifying the existing circuit domain network.

To solve the above technical problem, the present invention provides an addressing system for an IMS user to fall back to a circuit domain, comprising:

the processing module is connected with the circuit domain signal, senses the registration of the IMS user in the circuit domain and addresses the roaming number in the circuit domain;

and the ENUM module is connected with the processing module and processes the query initiated by the IMS domain, and the ENUM module sends the query to the processing module and feeds back the query result.

Further, in the addressing system of the IMS user fallback circuit domain, the system further includes a database module, which is connected to the processing module and the ENUM module, and is configured to store and manage static data and dynamic data of the circuit domain registered user.

Further, in the addressing system of the IMS user dropping back to the circuit domain, the processing module senses location update from the circuit domain, and the database module updates the stored user registration state according to the location update message from the processing module.

Further, in the addressing system of the IMS subscriber fallback circuit domain, the static data includes the circuit domain MSISDN and IMSI of the full amount of IMS subscribers; the dynamic data comprises data formed after interface messages between the processing module and the database module are created, changed or deleted, and further comprises circuit domain registration state, position information and registration validity period.

Further, in the addressing system of the IMS user fallback circuit domain, the processing module is a MAP message processing module.

In addition, in another aspect of the present invention, an addressing method for an IMS user to fall back to a circuit domain is further provided, where any one of the systems described above is adopted, and the method includes:

the ENUM module receives a query request initiated by an IMS domain, forwards the query request to the processing module, and initiates roaming number addressing to a circuit domain and feeds back a query result by the processing module.

Further, in the addressing method for the IMS user falling back to the circuit domain, the system includes a database module, which is connected to the processing module and the ENUM module, and is configured to store and manage static data and dynamic data of the circuit domain registered user; wherein the method comprises the following steps:

the processing module senses position updating from the circuit domain and sends position updating information to the database module;

and the database module generates and manages dynamic data according to the position updating message.

Further, in the addressing method for the IMS user to fall back to the circuit domain, the location update message includes an initial location update, a periodic location update, and a deregistration.

Further, in the addressing method of the IMS user fallback circuit domain, the system includes a database module, which is connected to the processing module and the ENUM module, and is configured to process a pre-screening request initiated by the ENUM module; wherein the method comprises the following steps:

when the ENUM module receives a query request initiated by an IMS domain, the ENUM module firstly requests the database module for pre-screening;

and the ENUM module forwards the query request to the processing module according to the pre-screening result as required, and the processing module initiates roaming number addressing to a circuit domain.

Further, in the addressing method for the IMS user dropping circuit domain, the pre-screening includes the steps of:

the database module receives the query request initiated by the ENUM module, and returns the IMSI and the position information of the number if the user is in a registered state and is in a validity period; if the user is in an unregistered state, or exceeds the registration validity period, or has no dynamic data, a failure error code is returned.

Further, in the addressing method for the IMS user to fall back to the circuit domain, the processing module senses that the IMS user is registered in the circuit domain in a direct sensing manner; the direct sensing mode is that the processing module plays the role of HLR in the circuit domain, and senses the registration state of the IMS user in the circuit domain through receiving the position updating message initiated by the terminal in the circuit domain.

Further, in the addressing method for dropping the circuit domain by the IMS user, the processing module senses that the IMS user is registered in the circuit domain in an indirect sensing manner; the indirect perception mode is that the processing module plays a GMSC role in the circuit domain, and the signaling monitoring system detects a position updating event initiated by the terminal in the circuit domain and informs the processing module, thereby perceiving the registration state of the IMS user in the circuit domain.

Further, in the addressing method for the IMS subscriber dropping to the circuit domain, the step of addressing the roaming number in the circuit domain includes:

after receiving a roaming number addressing request initiated by the ENUM module, addressing the roaming number in a circuit domain by adopting a direct addressing mode or an indirect addressing mode;

the direct addressing mode is that the processing module directly initiates addressing to VLR registered by a user through a signaling network to obtain a roaming number;

the indirect addressing mode is that the processing module initiates addressing to HLR to which the user belongs through a signaling network, and the HLR addresses to VLR to acquire a roaming number;

return roaming number or failure result.

Compared with the prior art, the invention at least has the following beneficial effects:

compared with the current 3GPP2 network, the method and the device do not need to reform the existing circuit domain network, and directly finish the circuit domain roaming number addressing of the called fallback user in the IMS domain based on the IMS call signaling flow.

Furthermore, the invention directly or indirectly senses the position update of the user in the circuit domain, generates and manages corresponding dynamic data for the pre-screening purpose when the called party addresses the roaming number. The pre-screening query can greatly reduce the pressure of addressing roaming numbers in the circuit domain and reduce a large amount of invalid addressing of non-fallback users.

Drawings

Fig. 1 is a block diagram illustrating an implementation of international roaming in the prior art;

fig. 2 is a block diagram of an addressing system of an IMS subscriber fallback circuit domain according to a first embodiment of the present invention;

FIG. 3 is a logic diagram of a circuit domain location update process according to a second embodiment of the present invention;

FIG. 4 is a logic diagram of called query processing for pre-screening no registration information according to a second embodiment of the present invention;

fig. 5 is a logic diagram of called query processing when the circuit domain does not return the roaming number when the registration information is pre-screened in the second embodiment of the present invention;

fig. 6 is a logic diagram of called query processing for a circuit domain returning a roaming number when pre-screening registration information according to a second embodiment of the present invention;

FIG. 7 is a logic diagram illustrating a second embodiment of processing static data update;

FIG. 8 is a logic diagram of a second embodiment of the present invention for updating dynamic data.

Detailed Description

The method and system for addressing an IMS subscriber fallback circuit domain according to the present invention will be described in more detail below with reference to schematic diagrams, in which preferred embodiments of the present invention are shown, it should be understood that those skilled in the art can modify the present invention described herein while still achieving the advantageous effects of the present invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.

The invention is more particularly described in the following paragraphs with reference to the accompanying drawings by way of example. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is provided for the purpose of facilitating and clearly illustrating embodiments of the present invention.

Example one

As shown in fig. 2, an embodiment of the present invention provides an addressing system for an IMS subscriber to fall back to a circuit domain, including: the processing module is in signal connection with the circuit domain, senses the registration of the IMS user in the circuit domain and addresses the roaming number in the circuit domain; and the ENUM module is connected with the processing module and processes the query initiated by the IMS domain, and the ENUM module sends the query to the processing module and feeds back the query result.

Preferably, in this embodiment, the addressing system further includes a database module, connected to the processing module and the ENUM module, where the database module is configured to store and manage static data and dynamic data of circuit domain registered users.

Wherein, the processing module is a MAP message processing module. The processing module senses location update from the circuit domain, and the database module updates the stored user registration state according to the location update message from the processing module.

In this embodiment, the processing module can directly or indirectly sense that the IMS user is registered in the circuit domain.

In a specific embodiment, a direct sensing manner may be adopted, where the processing module plays a role of an HLR in the circuit domain, and senses the registration state of the IMS user in the circuit domain by receiving a location update message initiated by the terminal in the circuit domain, including initial location update, periodic location update, logout, and the like.

In other embodiments outside this embodiment, an indirect sensing manner may also be adopted, where the processing module plays a role of GMSC in the circuit domain, and the signaling monitoring system detects a location update event initiated by the terminal in the circuit domain, including initial location update, periodic location update, logout, and notifies the processing module, so as to sense the registration state of the IMS user in the circuit domain.

In this embodiment, the processing module also needs to process the circuit domain addressing roaming number. And after receiving a roaming number addressing request initiated by the ENUM module, directly or indirectly addressing the roaming number in a circuit domain, and returning the roaming number or other failure results.

In a specific embodiment, a direct addressing mode may be adopted, and the processing module directly initiates addressing to a VLR registered by a user through a signaling network to acquire a roaming number.

In other embodiments outside this embodiment, an indirect addressing mode may be adopted, where the processing module initiates addressing to an HLR to which the user belongs through a signaling network, and the HLR addresses to a VLR to obtain a roaming number, and returns the roaming number or other failure results to the ENUM module.

In addition, in this embodiment, the processing module is further capable of updating the user registration status.

In a specific embodiment, the processing module senses the registration state of the IMS user in the circuit domain, and updates the registration state of the user to the database module, including creating, changing, and deleting user data. And the processing module addresses the roaming number to the circuit domain, if the roaming number is not acquired, the processing module updates the registration state of the user to the database module and deletes the user data if the processing module fails to acquire the roaming number.

In this embodiment, the database module is configured to store static data and dynamic data of a user registered in the circuit domain.

Specifically, the database module implements static data management, and the static data includes, but is not limited to, MSISDN and IMSI of circuit switched domain of full IMS subscribers. When IMS user opens an account, sells an account and changes cards through CRM, CRM needs to synchronously update MSISDN and IMSI of IMS user to the database module. The database module always stores the latest paired MSISDN and IMSI of the full number of IMS users. In addition, the database module implements dynamic data management. The dynamic data is created, changed and deleted by interface information between the processing module and the database module, and also comprises a circuit domain registration state, position information, a registration validity period and the like, and is dynamic data generated by the IMS user during the circuit domain registration.

In this embodiment, the database module may also be capable of pre-screening circuit domain addressed roaming numbers.

In a specific embodiment, the database module receives the query initiated by the ENUM module, and returns the IMSI and location information of the number if the subscriber is registered and is in a validity period

In other embodiments, the database module receives the query from the ENUM module, and returns a failure error code if the subscriber is unregistered, exceeds the registration validity period, or has no dynamic data.

In this embodiment, the ENUM module is configured to process an inquiry initiated by the IMS domain, and return a circuit domain roaming number or a failure response.

In one embodiment, the ENUM module is configured to process NAPTR query requests. And the ENUM module receives NAPTR inquiry which is initiated by the IMS domain and contains MSISDN mobile number, and returns the sipurl with the circuit domain roaming number or the 'no sun name' error code according to the inquiry result initiated to the processing template or the database module.

In this embodiment, the ENUM module performs pre-screening on the circuit domain addressed roaming numbers.

In a specific embodiment, the ENUM module sends a pre-screening query request including the MSISDN mobile number to the database module, and receives a response including the IMSI and location information of the number if the number is in a registered state.

In other embodiments outside this embodiment, the ENUM module sends a pre-screening query request including the MSISDN mobile number to the database module, and receives a failure error code if the number is not registered.

Further, the ENUM module addresses a roaming number to a circuit domain. And the ENUM module sends an addressing roaming number request to the processing template according to the pre-screening result. The processing template executes the circuit domain addressing roaming number function and returns the roaming number or other failure results to the ENUM module.

Example two

The present embodiment provides an addressing method for an IMS subscriber fallback circuit domain, which uses the addressing system for an IMS subscriber fallback circuit domain according to the first embodiment, where the method includes:

the ENUM module receives an inquiry request initiated by an IMS domain, forwards the inquiry request to the processing module, and initiates roaming number addressing to a circuit domain by the processing module.

Further, the method further comprises:

the processing module senses position updating from the circuit domain and sends a position updating message to the database module;

the database module generates and manages dynamic data according to the position updating message;

when the ENUM module receives a query request initiated by an IMS domain, the ENUM module firstly requests the database module for pre-screening;

and the ENUM module forwards the query request to the processing module according to the pre-screening result as required, and the processing module initiates roaming number addressing to a circuit domain.

In an embodiment, referring to fig. 3, the ims user dropping back to the circuit domain to initiate location update includes the steps of:

1. the circuit domain directly sends a location updating message to the processing module through a No. seven signaling network, and the processing module executes an HLR function and receives location updating; or the signaling monitoring system detects a successful circuit domain position updating message, generates a position updating event and pushes the position updating event to the processing module of the invention.

2. The processing module senses the position update and updates dynamic data generated by the circuit domain position update to the database module, wherein the dynamic data comprises public identification MSISDN (Mobile station identifier), private identification IMSI (International Mobile subscriber identity), registration state, location information of a visiting place, registration validity period and the like of a user. Wherein: and initially registering to correspondingly create dynamic data, re-registering to correspondingly change the dynamic data, and canceling to correspondingly delete the dynamic data.

The IMS user is called to pre-screen the registration-free information, see fig. 4.

1. The user is called, IMS network element initiates NAPTR inquiry, the inquiry object includes direct MSISDN number, or indirect prefix + MSISDN number.

2. The NAPTR query is recursive to the ENUM module of the present invention. The ENUM module extracts MSISDN number and sends inquiry to the database module in order to obtain the registration state and current visiting place position information of the user.

3. And the database module does not have dynamic data corresponding to the MSISDN and returns a failure error code.

4. After receiving the failure error code returned by the database module, the ENUM module directly returns a failure response including, but not limited to, a "no sucname" error code for NAPTR query.

The IMS user is called, and the registration information is pre-screened, but the circuit domain does not return the roaming number, and the query processing logic is as shown in fig. 5.

1. The user is called, IMS network element initiates NAPTR inquiry, the inquiry object includes direct MSISDN number, or indirect prefix + MSISDN number.

2. The NAPTR query is recursive to the ENUM module. The ENUM module extracts MSISDN number and sends inquiry to the database module in order to obtain the registration state and current visiting place position information of the user.

3. And the database module inquires dynamic data corresponding to the MSISDN and returns a successful response carrying the private identity IMSI and the visitor location information VLR Number or GT.

4. After receiving the successful response returned by the database module, the ENUM module initiates a roaming Number addressing query request to the processing module, where the roaming Number addressing query request carries a public identifier MSISDN, a private identifier IMSI, and visitor location information VLR Number or GT.

5. The processing module initiates roaming number addressing to the circuit domain through a seventh signaling network.

6. The processing module receives a return error code or a non-return roaming number of a circuit domain and returns a failure error code to the ENUM module; and deleting the dynamic data of the MSISDN to the database module.

7. After receiving the failure error code returned by the processing module, the ENUM module returns a failure response including, but not limited to, a "no such name" error code for NAPTR query.

The IMS user is called, registration information is pre-screened, the circuit domain returns a roaming number, and the query processing logic is as shown in fig. 6.

1. The user is called, IMS network element initiates NAPTR inquiry, the inquiry object includes direct MSISDN number, or indirect prefix + MSISDN number.

2. The NAPTR query is recursive to the ENUM module. The ENUM module extracts MSISDN number and sends inquiry to the database module in order to obtain the registration state and current visiting place position information of the user.

3. And the database module inquires dynamic data corresponding to the MSISDN and returns a successful response carrying the private identification IMSI and the visitor location information VLR Number or GT.

4. After receiving the successful response returned by the database module, the ENUM module initiates a roaming Number addressing query request to the processing module, where the roaming Number addressing query request carries a public identifier MSISDN, a private identifier IMSI, and visitor location information VLR Number or GT.

5. The processing module initiates roaming number addressing to the circuit domain through a No. seven signaling network.

6. And the processing module receives the roaming number returned by the circuit domain and returns a successful response carrying the roaming number to the ENUM module.

7. And after receiving the successful response returned by the processing module, the ENUM module returns the successful response carrying the roaming number for NAPTR query, wherein the domain name of the sip url is a circuit domain name.

Static data processing logic see fig. 6.

When the IMS user opens an account, sells an account and changes cards through the CRM, the CRM or the service system synchronously updates the MSISDN and the IMSI of the public identification of the IMS user to the database module.

Dynamic data processing logic see fig. 7.

The processing module senses the position update of the user in the circuit domain based on the position update message received by the No. seven signaling network or based on the position update event pushed by the signaling monitoring system, and updates the dynamic data of the user to the database module.

And the processing module fails to address the roaming number to the circuit domain, does not acquire the roaming number, and deletes the dynamic data of the user from the database module.

In summary, the present invention adopts an idea and method for concatenating the IMS network NAPTR query and the circuit domain addressed roaming number. Based on NAPTR inquiry, the circuit domain roaming number can be directly returned to the circuit domain called user. And providing a pre-screening basis for the NAPTR query of the IMS network based on the dynamic database updated by the circuit domain position, and returning a differential query result.

For the mobile network of the original 3GPP2 formation, the network does not need to be greatly improved, and the problem that an IMS user falls back to the voice called addressing of the 3GPP 2G/3G circuit domain is solved.

The most important step of the IMS network call flow is to initiate NAPTR query to ENUM, and translate the called number from tel url format to sip url format, which is a necessary link for every communication call. The invention is a universal NAPTR inquiry from the view point of the IMS network, is a call processing flow of the IMS network standard and has no need of modifying the IMS network.

The invention directly or indirectly senses the position update of the user in the circuit domain, generates and manages corresponding dynamic data for pre-screening when the called party addresses the roaming number. The pre-screening query can greatly reduce the pressure of addressing roaming numbers in the circuit domain and reduce a large amount of invalid addressing of non-fallback users.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (13)

1. An addressing system for an IMS subscriber dropping circuit domain, comprising:

the processing module is in signal connection with the circuit domain, senses the registration of the IMS user in the circuit domain and addresses the roaming number in the circuit domain;

and the ENUM module is connected with the processing module and processes the query initiated by the IMS domain, and the ENUM module sends the query to the processing module and feeds back the query result.

2. The IMS subscriber fallback circuit domain addressing system of claim 1 further comprising a database module connecting said processing module and said ENUM module, said database module for storing and managing static and dynamic data of circuit domain registered subscribers.

3. The IMS subscriber fall back circuit domain addressing system of claim 2, wherein the processing module senses location updates from the circuit domain, and the database module updates the stored subscriber registration status based on location update messages from the processing module.

4. The system of claim 2, wherein the static data comprises a circuit domain MSISDN and IMSI of a full number of IMS subscribers; the dynamic data comprises data formed after interface messages between the processing module and the database module are created, changed or deleted, and further comprises a circuit domain registration state, position information and a registration validity period.

5. The system of claim 1, wherein the processing module is a MAP message processing module.

6. A method for addressing an IMS subscriber fallback circuit domain, using any one of the systems as claimed in claims 1 to 5, the method comprising:

the ENUM module receives a query request initiated by an IMS domain, forwards the query request to the processing module, and initiates roaming number addressing to a circuit domain and feeds back a query result by the processing module.

7. The method as claimed in claim 6, wherein the system comprises a database module, a connection processing module and an ENUM module, the database module is used for storing and managing static data and dynamic data of circuit domain registered users; wherein the method comprises the following steps:

the processing module senses position updating from the circuit domain and sends a position updating message to the database module;

and the database module generates and manages dynamic data according to the position updating message.

8. The method of addressing an IMS subscriber to fall back to a circuit domain of claim 7, wherein the location update message comprises an initial location update, a periodic location update, and a deregistration.

9. The method of claim 6 wherein the system comprises a database module coupled to the processing module and the ENUM module, the database module configured to process pre-screening requests initiated by the ENUM module; wherein the method comprises the following steps:

when the ENUM module receives a query request initiated by an IMS domain, the ENUM module firstly requests the database module for pre-screening;

and the ENUM module forwards the query request to the processing module according to the pre-screening result as required, and the processing module initiates roaming number addressing to a circuit domain.

10. The method of addressing an IMS subscriber fall-back circuit domain of claim 9, wherein the pre-screening comprises the steps of:

the database module receives the inquiry request initiated by the ENUM module, and returns the IMSI and the position information of the number if the user is in a registered state and is in a validity period; if the user is in an unregistered state, or exceeds the registration validity period, or has no dynamic data, a failure error code is returned.

11. The method according to claim 6, wherein the processing module senses that the IMS user is registered in the circuit domain in a direct sensing manner; the direct sensing mode is that the processing module plays the role of HLR in the circuit domain, and senses the registration state of the IMS user in the circuit domain through receiving the position updating message initiated by the terminal in the circuit domain.

12. The method as claimed in claim 6, wherein the processing module employs an indirect sensing manner to sense that the IMS user is registered in the circuit domain; the indirect perception mode is that the processing module plays a GMSC role in the circuit domain, and the signaling monitoring system detects a position updating event initiated by the terminal in the circuit domain and informs the processing module, so as to perceive the registration state of the IMS user in the circuit domain.

13. The method of claim 6, wherein the step of addressing the roaming number in the circuit domain comprises the steps of:

after receiving a roaming number addressing request initiated by the ENUM module, addressing a roaming number in a circuit domain by adopting a direct addressing mode or an indirect addressing mode;

the direct addressing mode is that the processing module directly initiates addressing to VLR registered by a user through a signaling network to obtain a roaming number;

the indirect addressing mode is that the processing module initiates addressing to HLR to which the user belongs through a signaling network, and the HLR addresses to VLR to acquire a roaming number;

return roaming number or failure result.

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