CN115665727A

CN115665727A - Method and device for realizing VoLTE service of roaming place with one card and multiple numbers

Info

Publication number: CN115665727A
Application number: CN202211223021.0A
Authority: CN
Inventors: 陈柯兵; 白莲红
Original assignee: Wuhan Mackenting Technology Co ltd
Current assignee: Wuhan Mackenting Technology Co ltd
Priority date: 2022-10-08
Filing date: 2022-10-08
Publication date: 2023-01-31

Abstract

The application discloses a method and a device for realizing VoLTE service of roaming places with one card and multiple numbers, wherein the method comprises the following steps: setting a signaling gateway platform, wherein the platform is respectively connected with a home communication network where a primary number is located and a roaming communication network where a secondary number is located; binding a primary number, a secondary number and an IMSI number of a one-card multi-number user on a signaling gateway platform; the home location S-CSCF configures Diamter routing according to the IMSI; the I-CSCF of the roaming place configures an SIP route according to the auxiliary number; and performing data interaction with the home location and the roaming location network through the signaling gateway platform, completing network registration for the user, and performing routing processing on the voice calling and the auxiliary number of the user as the voice call of the called party. The invention can enable the user to carry out voice service through the LTE network of the roaming place without closing the VoLTE switch at the mobile phone side in the roaming place, thereby meeting the VoLTE service requirement of the user with one card and multiple numbers.

Description

Method and device for realizing VoLTE service of roaming place with one card and multiple numbers

Technical Field

The invention relates to the technical field of mobile communication, in particular to a method and a device for realizing a VoLTE service of a roaming place with one card and multiple numbers.

Background

With the increase of enterprise cross-regional business and the development of global operation, communication business requirements of people frequently coming to and going from the world and abroad are increasingly active and diversified. The one-card multi-number service is a service which can provide the same service for users in a plurality of roaming areas at the same time, and can provide convenience for users who need to frequently enter and exit. The user has a SIM card of the home operator, and uses the number of the home location at the local place and the number of the roaming location operator at the roaming place. VoLTE is based on an IMS network, on which voice services (control and media level) are transported as data streams in an LTE data bearer network, without the need to maintain and rely on a traditional circuit switched voice network. In the traditional 2G and 3G networks, a user can only make a call and cannot surf the internet at the same time during voice communication; when the VoLTE function of the mobile phone is started, the mobile phone can answer a call and cannot be disconnected, and various requirements of a user can be met.

Currently, when a VoLTE subscriber with one card and multiple numbers roams in the outbound, the subscriber needs to close the VoLTE switch on the mobile phone side, and the actual call process is implemented by using a conventional circuit-switched voice network through a fall back mode. This is inconvenient for the user and easily causes complaints from the user.

Therefore, it is necessary to provide a roaming service providing method with one card and multiple numbers to solve the problem in the prior art that a VoLTE access cannot be completed by a VoLTE user with one card and multiple numbers in a roaming place, so that the VoLTE switch on the mobile phone side needs to be turned off when the user roams outbound, and a call is realized through a traditional circuit switched voice network.

Disclosure of Invention

In view of the above, it is necessary to provide a method and an apparatus for implementing a VoLTE service in a roaming area with one card and multiple numbers, so as to solve the problem that the VoLTE access cannot be completed in the roaming area by the existing VoLTE user with one card and multiple numbers, which causes the VoLTE switch on the mobile phone side to be turned off when the user roams outbound, and the call is implemented through the traditional circuit switched voice network.

In order to solve the above problem, the present invention provides a method for implementing a VoLTE service in a roaming area with one card and multiple numbers, including:

setting a signaling gateway platform, wherein the signaling gateway platform is respectively connected with a home communication network where a main number is located and a roaming communication network where an auxiliary number is located;

binding a primary number, a secondary number and an IMSI number of a VoLTE user with one card and multiple numbers on the signaling gateway platform;

an S-CSCF network element in a home communication network configures Diamter route to the signaling gateway platform according to the IMSI number segment;

an I-CSCF network element in the communication network of the roaming place configures an SIP route to the signaling gateway platform according to the auxiliary number;

and performing data interaction with the home communication network and the roaming communication network through the signaling gateway platform, completing network registration for the VoLTE user with one card and multiple numbers, and performing routing processing on the voice calling and the auxiliary number of the VoLTE user with one card and multiple numbers as the voice calling of a called party.

Further, data interaction is performed between the signaling gateway platform and the home communication network and between the signaling gateway platform and the roaming communication network, so that network registration is completed for the VoLTE user with one card and multiple numbers, and the method comprises the following steps:

when a VoLTE user carries out IMS network registration in a home location or roaming location communication network, HSS sends SAA information to the signaling gateway platform;

and the signaling gateway platform adds the modification of the iFC information into the SAA message and sends the SAA message after the modification to an S-CSCF network element.

Further, the signaling gateway platform adds modification to the iFC information in the SAA message, including: and the signaling gateway platform adds the lowest modification of the priority of the voice calling iFC in the calling iFC set in the SAA message.

Further, performing data interaction with the home communication network and the roaming communication network through the signaling gateway platform, and performing routing processing on the voice calling of the VoLTE subscriber with one card and multiple numbers, including:

after an S-CSCF network element in a home or roaming area communication network receives a voice calling request of a VoLTE user with one card and multiple numbers, a voice calling request is triggered to the signaling gateway platform according to iFC when the VoLTE user with one card and multiple numbers is registered;

the signaling gateway platform judges the type of the voice call request;

when the voice call type is a voice calling party, judging the position of the calling party;

and when the calling position is a roaming place, modifying the calling number into an auxiliary number, and sending an INVITE message to the S-CSCF network element.

Further, performing data interaction with the home communication network and the roaming communication network through the signaling gateway platform, and performing routing processing on the secondary number of the VoLTE subscriber with one card and multiple numbers as a called voice call, including:

when the auxiliary number of the VoLTE user with one card and multiple numbers is used as a called party, an I-CSCF network element in the roaming place communication network sends a voice called calling request of the auxiliary number to the signaling gateway platform;

the signaling gateway platform modifies the called number from an auxiliary number to a main number and routes the voice call request to an I-CSCF of the home location;

and the I-CSCF of the home location carries out call continuation according to the flow that the called number is the main number.

Further, the method further comprises:

an SMSC in a roaming place communication network configures MAP routing to the signaling gateway platform according to the secondary number of the VoLTE user with one card and multiple numbers;

when the VoLTE user performs IMS network registration in the home or roaming communication network, the modification of the SAA message by the signaling gateway platform further includes: and setting the iFC priority of the short message calling to be higher than the iFC configured by the HSS/HLR to the IM-SMS-GW.

Further, the method further comprises:

and performing data interaction with the home communication network and the roaming communication network through the signaling gateway platform to provide routes for a short message calling party and an auxiliary number of a VoLTE-one-card multi-number user to serve as short message called parties.

Further, data interaction is performed between the signaling gateway platform and the home communication network and between the signaling gateway platform and the roaming communication network, and a route is provided for a short message calling of a VoLTE user with one card and multiple numbers, including:

after receiving a short message calling request of a VoLTE user with one card and multiple numbers by an S-CSCF network element in a home or roaming communication network, sending a short message calling request message to the signaling gateway platform according to the iFC priority during registration;

the signaling gateway platform carries out short message ticket recording on the short message calling request information and returns the short message request information to the S-CSCF network element;

the S-CSCF network element forwards the SIP Message to the IP-SMS-GW network element according to the iFC rule during registration;

the IP-SMS-GW network element forwards to the SMSC over the MAP interface.

Further, data interaction is performed between the signaling gateway platform and the home communication network and between the signaling gateway platform and the roaming communication network, and a route is provided for a secondary number of a one-card multi-number VoLTE user as a short message called party, and the method comprises the following steps:

when the called number of the short message is the auxiliary number segment, the HSS in the home or roaming communication network sends the SRI-SM message to the signaling gateway platform;

the signaling gateway platform converts the auxiliary number into a main number and sends an SRI-SM message to the HSS;

the HSS returns an SRI-SM-ACK message, and the message carries IP-SMS-GW network element information;

the signaling gateway platform modifies the IP-SMS-GW information into the signaling gateway platform and returns SRI-SM-ACK to the SMSC;

SMSC sends called short message MT-FSM to signaling gateway platform;

the signaling gateway platform forwards to the IP-SMS-GW.

The invention also provides a device for realizing the VoLTE service of the roaming place with one card and multiple numbers, which comprises the following steps:

the platform establishing module is used for setting a signaling gateway platform which is respectively connected with a home communication network where the main number is located and a roaming communication network where the auxiliary number is located;

the user binding module is used for binding the primary number, the secondary number and the IMSI number of the VoLTE user with one card and multiple numbers on the signaling gateway platform;

the home location configuration module is used for configuring the Diamter route to the signaling gateway platform by the S-CSCF network element in the home location communication network according to the IMSI number segment;

a roaming place configuration module, configured to configure an SIP route to the signaling gateway platform according to the auxiliary number by an I-CSCF network element in a roaming place communication network;

and the data interaction module is used for performing data interaction with the attribution place communication network and the roaming place communication network through the signaling gateway platform, completing network registration for the VoLTE user with one card and multiple numbers, and performing routing processing on the voice calling and the auxiliary number of the VoLTE user with one card and multiple numbers as the voice calling of a called party.

Compared with the prior art, the invention has the beneficial effects that: firstly, setting a signaling gateway platform, and connecting a communication network where a main number and an auxiliary number are located with the signaling gateway platform; secondly, binding the primary number, the secondary number and the IMSI number of the VoLTE-one-card multi-number user, and carrying out corresponding configuration on the communication network of the home location and the roaming location according to the user information; and finally, performing data interaction with the communication networks of the home location and the roaming location through the signaling gateway platform, and finishing registration, voice calling and auxiliary number as the voice call routing processing of a called party for the user. According to the invention, through the setting of the signaling gateway platform, when a user registers in an LTE network, the corresponding relation between the main number and the auxiliary number is established, so that the main number and the auxiliary number stored in the HSS are consistent, and the condition that the bearing establishment fails in the network is avoided; the user can carry out voice service through the 4G LTE network of the roaming place without closing the VoLTE switch at the mobile phone side in the roaming place, and the call can be realized without switching to a 3G or 2G network, so that the requirement of the user on the VoLTE service with one card and multiple numbers is met.

Drawings

Fig. 1 is a flowchart illustrating an embodiment of a method for implementing a VoLTE service in a roaming area with one card and multiple numbers according to the present invention;

fig. 2 is a schematic structural diagram of an embodiment of a signaling gateway platform and a home-location roaming-location communication network provided in the present invention;

fig. 3 is a signaling flowchart of an embodiment of registration of a VoLTE subscriber with one card and multiple numbers provided by the present invention;

FIG. 4 is a signaling flow diagram of an embodiment of a user voice caller provided by the present invention;

fig. 5 is a signaling flowchart of an embodiment of the present invention in which a subscriber's auxiliary number is used as a voice call;

FIG. 6 is a signaling flowchart of an embodiment of a user calling a short message according to the present invention;

fig. 7 is a signaling flowchart of an embodiment of the present invention in which a subscriber secondary number is called as a short message;

fig. 8 is a schematic structural diagram of an embodiment of an apparatus for implementing a VoLTE service in a roaming area with one sim card with multiple numbers according to the present invention.

Detailed Description

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.

Prior to the description of the embodiments, the related terms are explained first.

VoLTE (Voice over Long-Term Evolution Voice bearer) is an IP data transmission technology, and can realize that data and Voice services are the same on a 4G network, that is: during the use process of the VoLTE, the VoLTE mobile phone can still keep smooth operation on the 4G network. In addition to not dropping calls, voLTE also provides faster dial-through speed and better voice quality. Compared with 2G and 3G voice communication, the voice quality can be improved by about 40 percent.

An IMS (IP Multimedia Subsystem) is a Multimedia service system that is built on a mobile packet domain core network and uses SIP as a control protocol, can meet diversified Multimedia service requirements of users, is an important way to introduce differentiated services such as triple fusion of voice, data, and video, and can enable operators to provide end-to-end IP Multimedia services for users.

The functional entities of the IMS include: a CSCF (Call Session Control Function), an SBC (Session border Controller), and an HSS (Home Subscriber Server). The CSCF types include P-CSCF (Proxy-CSCF), I-CSCF (Interrogating CSCF), and S-CSCF (Serving CSCF).

And the P-CSCF: the main function is service routing, which is the first step of accessing UE to IMS network, P-CSCF is responsible for forwarding SIP registration request received from UE, and determining the next entry node according to the home domain name of UE; the SIP message received from the UE is forwarded to a SIP server (e.g., S-CSCF).

And S-CSCF: is responsible for providing registration services, session control and related routing functions, and maintaining session state information.

I-CSCF: and the system is used for selecting one S-CSCF to provide services for the user according to the S-CSCF capability set returned by the HSS.

HSS: the Home Subscriber Server is the primary Subscriber database that supports the IMS network entities for handling calls/sessions. It contains a user profile, performs authentication and authorization of the user, and may provide information about the physical location of the user.

SBC: session Border Controller, which is an IP service gateway in VoIP communication, is generally applied in operator IMS and enterprise VoIP. The SBC can support both VoIP session signaling proxy and media proxy.

SIP protocol: session initiation Protocol (sip) is a multimedia communication Protocol established by IETF. Is a text-based application-layer control protocol for creating, modifying and releasing sessions of one or more participants. SIP is an IP voice session control protocol originated from the Internet, and has the characteristics of flexibility, convenience for expansion and the like.

Diameter protocol: the improvement and upgrade of the Radius protocol are signaling network bearer protocols in the LTE system, and are also AAA protocols (authentication, authorization, accounting charging) based on IP technology. The basic protocol is defined by the specification RF3588 (latest RFC 6733), the extensions in LTE networks are supplementarily defined by different specifications of 3GPP, such as the S6a protocol defined by 29.272, the Gx protocol defined by 29.212, etc. Diameter session initiation protocol applications are used in conjunction with the Session Initiation Protocol (SIP), providing Diameter client functionality in a SIP server.

IP-SM-GW: IP-Short-Message-Gateway, the Message that IP Short Message Gateway is responsible for processing has: receiving a third party registration message, receiving an IMS domain initial call message, receiving a CS domain final call message, sending an Sh interface (an interface between an application server AS and an HSS, wherein an IP short message gateway also serves AS an AS role) Diameter message, sending a transport layer intercommunication CS domain initial call message, sending a service layer intercommunication CS domain initial call message (adopting an instant messaging protocol (CPIM)), sending an IMS domain final call message, and sending a CS domain final call message.

SMSC (ShortMessageServiceCenter ): is responsible for handling SMS operations for wireless networks or SMS service providers. When an SMS message is sent from a mobile phone (or from a computer), it will first reach the SMSC center. The SMSC center then forwards the SMS message to the destination. SMS messages may need to pass through multiple SMSCs before reaching a destination. The main role of the SMSC is to store and forward SMS messages and to specify the flow. It also provides billing support for the operator.

And (3) MAP protocol: the MAP protocol is used in 2G/3G network, and defines the information exchange modes between the relevant network elements of the mobile communication core network for implementing the roaming function of the mobile station, including message flow, operation definition, data type, error type and specific coding.

The existing basic registration process of the VoLTE service is as follows:

1. the VoLTE terminal is accessed to an LTE network to carry out LTE attachment;

2. obtaining an IP address after the attachment is successful, and establishing a signaling bearer to the IMS network;

3. the VoLTE terminal is registered to the IMS network through IMS signaling bearing, and the IMS network records the P-CSCF accessed by the user and the S-CSCF address served by the P-CSCF, so that the subsequent call is convenient to be connected with the user.

However, under the condition that the operator needs to be replaced when the one-card multi-number VoLTE user roams outbound or roams in China, the VoLTE access in the IMS network of the roaming place cannot be completed due to the change of the operator, and the voice call of the user can only be realized through a traditional circuit switching voice system; the user needs to close the VoLTE function of the mobile phone side to complete the call, which causes great invariance to the use of the user.

The invention completes the registration of the user and the routing processing of the voice calling and the auxiliary number of the user as the voice calling of the called through setting the signaling gateway platform, can realize the VoLTE service under the condition that the VoLTE function of the mobile phone side is not closed in a roaming place, and improves the satisfaction degree of the user.

The embodiment of the present invention provides a method for implementing a VoLTE service in a roaming place with one card with multiple numbers, and fig. 1 is a schematic flow diagram of an embodiment of the method for implementing the VoLTE service in the roaming place with one card with multiple numbers provided by the present invention, including:

step S101: setting a signaling gateway platform, wherein the signaling gateway platform is respectively connected with a home communication network where a main number is located and a roaming communication network where an auxiliary number is located;

step S102: binding a primary number, a secondary number and an IMSI number of a VoLTE user with one card and multiple numbers on the signaling gateway platform;

step S103: an S-CSCF network element in a home communication network configures Diamter route to the signaling gateway platform according to the IMSI number segment;

step S104: an I-CSCF network element in the roaming place communication network configures an SIP route to the signaling gateway platform according to the auxiliary number;

step S105: and performing data interaction with the home communication network and the roaming communication network through the signaling gateway platform, completing network registration for the VoLTE user with one card and multiple numbers, and performing routing processing on the voice calling and the auxiliary number of the VoLTE user with one card and multiple numbers as the voice calling of a called party.

The method for implementing the VoLTE service of the roaming place with one card and multiple numbers includes the steps that firstly, a signaling gateway platform is arranged, and a communication network where a main number and an auxiliary number are located is connected with the signaling gateway platform; secondly, binding the primary number, the secondary number and the IMSI number of the VoLTE-one-card multi-number user, and carrying out corresponding configuration on the communication network of the home location and the roaming location according to the user information; and finally, performing data interaction with the communication networks of the home location and the roaming location through the signaling gateway platform, and finishing registration, voice calling and auxiliary number as the voice call routing processing of a called party for the user. In the embodiment, through the setting of the signaling gateway platform, when the user performs LTE network registration, a corresponding relationship between the primary number and the secondary number is created, so that the primary number and the secondary number stored in the HSS are consistent, and the condition that bearer establishment fails in the network is avoided; the user can carry out voice service through the 4G LTE network of the roaming place without closing the VoLTE switch at the mobile phone side in the roaming place, and the call can be realized without switching to a 3G or 2G network, so that the requirement of the user on the VoLTE service with one card and multiple numbers is met.

As a specific embodiment, as shown in fig. 2, fig. 2 is a schematic diagram of a connection structure between a signaling gateway platform and a home-location and roaming-location communication network provided in this embodiment. In fig. 2, SG (signaling Gateway) represents a signaling Gateway platform provided in this embodiment, which is generally deployed in a primary number operator network, accesses an HDRA (HSTP) network element, and interacts Diameter/MAP signaling. And connecting the I-CSCF and S-CSCF network elements of the home operator and the I-CSCF network element of the roaming operator through an IP network, and interacting SIP signaling.

Wherein HDRA (HighDiameter Routing Agent) represents an advanced Diameter Routing Agent; the HSTP (High Signaling Transfer Poin) represents a High-level Signaling Transfer point, and completes roaming Signaling Transfer.

As a preferred embodiment, performing data interaction with the home communication network and the roaming communication network through the signaling gateway platform to complete network registration for a VoLTE subscriber with one card multiple number, including:

when a VoLTE user carries out IMS network registration in a communication network of a home location or a roaming location, HSS sends SAA information to the signaling gateway platform;

and the signaling gateway platform adds the modification of the iFC information in the SAA message and sends the modified SAA message to an S-CSCF network element.

As a preferred embodiment, the adding, by the signaling gateway platform, the modification to the iFC information in the SAA message includes: and the signaling gateway platform adds the modification of the priority of the voice calling iFC in the SAA message, wherein the modification is the lowest in the calling iFC set.

As a preferred embodiment, performing data interaction with the home communication network and the roaming communication network through the signaling gateway platform, and performing routing processing on the voice caller of the VoLTE subscriber with one card and multiple numbers includes:

the signaling gateway platform judges the type of the voice call request;

As a preferred embodiment, performing data interaction with the home communications network and the roaming communications network through the signaling gateway platform, and performing routing processing on the secondary number of the VoLTE subscriber with one card and multiple numbers as a called voice call, includes:

In order to implement the short message service of the one-card multi-number VoLTE user during roaming, the embodiment also provides an implementation method of using the short message calling number and the auxiliary number as the short message called number.

As a preferred embodiment, the method further comprises:

As a preferred embodiment, performing data interaction with the home communication network and the roaming communication network through the signaling gateway platform to provide a route for a short message caller of a VoLTE subscriber with one card and multiple numbers, including:

after an S-CSCF network element in a home or roaming communication network receives a short message calling request of a VoLTE user with one card and multiple numbers, sending a short message calling request message to the signaling gateway platform according to iFC priority during registration;

the IP-SMS-GW network element forwards to the SMSC over the MAP interface.

As a preferred embodiment, performing data interaction with the home communication network and the roaming communication network through the signaling gateway platform, and providing a route for a secondary number of a VoLTE subscriber with one card and multiple numbers as a short message called party, includes:

SMSC sends called short message MT-FSM to signaling gateway platform;

the signaling gateway platform forwards to the IP-SMS-GW.

As a specific example, for data services, since the data services do not involve the IMS network, independent of VoLTE calls, there is no need to go through the SG.

The following describes the above processing procedure with reference to embodiments 1 to 5 and with reference to a specific signaling flow chart.

Example 1

Prior to registration, there are the following preset conditions:

1. the VoLTE user with one card and multiple numbers carries out number binding on an SG platform, and the IMSI, the primary number and the secondary number are bound.

2. The home location S-CSCF configures Diamter route to SG according to IMSI number segment; the roaming place I-CSCF configures SIP route to SG according to MSISDN-F number segment, and the roaming place SMSC configures MAP route to SG according to MSISDN-F number segment.

The specific registration process is shown in fig. 3, and fig. 3 is a signaling flow chart of registration after a mobile phone of a VoLTE subscriber with one card and multiple numbers is powered on. The method specifically comprises the following steps:

the user firstly carries out LTE network login registration, the Diamter signaling of the interface S6a is directly registered without passing through the SG platform in the process, even if the S6a message passes through the SG, the SG can bypass processing without any modification. After the user accesses the LTE network, the IP address is successfully obtained, and the signaling bearing to the IMS network is established, namely: and when the LTE is registered with the network, an IMS signaling default bearer with QCI =5 is generated.

In the process that a user carries and registers in an IMS network through IMS signaling, the IMS registration uses SIP signaling, and the SIP signaling needs to pass through an SG network element. When HSS sends SAA (Server-Assignment-Answer) message to SG, SG modifies subscription data.

The specific subscription data modification comprises the following steps: two ifcs are added to the third party SG registration. The priority of the voice calling iFC is the lowest in the calling iFC set, and the priority of the short message calling iFC is higher than that of the iFC configured to the IM-SMS-GW by the HSS/HLR.

It should be noted that, in the figure, the Register is a registration process, UAR (User-Authorization-Request) represents User Authorization Request information, UAA (User-Authorization-Answer) represents User Authorization response information, MAR (Multimedia-Authorization-Request) represents a Multimedia authentication Request, and MAA (Multimedia-Authorization-Answer) represents a Multimedia authentication response; SAR (Server-Assignment-Request) represents a Server Assignment Request, SAA (Server-Assignment-Answer) represents Server response information; the SG modifies the subscription data in the SAA message, specifically: two ifcs added to SG registration: the priority of the voice calling iFC is the lowest in the calling iFC set, and the priority of the short message calling iFC is higher than that of the iFC to the IM-SMS-GW configured by the HSS/HLR.

Example 2

Fig. 4 is a signaling flow diagram of a user voice caller, as shown in fig. 4.

When a user calls, a calling side S-CSCF triggers a call to the SG according to the iFC signed to the SG during registration;

the SG checks the call type; and checking that the calling party is the calling party and the user roams at the partner, modifying the calling number into an auxiliary number by the SG, and sending an INVITE message to the S-CSCF.

Therefore, in the roaming network, the called terminal caller is displayed as a secondary number.

It should be noted that the Invite represents the voice caller request information sent by the user, that is: session initiation information, 180Ringing indicates the user ring alert, and 200OK indicates the user answers.

Example 3

As shown in fig. 5, fig. 5 shows a signaling flow diagram of the user voice called and the called number is a secondary number.

When the user voice is called and the called number is the roaming place (partner) secondary number, the partner I-CSCF routes the call to the SG platform according to the called number.

And the SG platform modifies the called number, modifies the called number from the auxiliary number to the main number and routes the called number to the home location I-CSCF.

And the home location I-CSCF performs call connection according to a general process that the called number is the main number. The platform generates a called ticket.

It should be noted that when the user is called and the called number is the primary number, the same procedure as the existing non-one-card multi-number procedure does not need to pass through the SG platform.

It should be noted that Invite represents session Request information, and LIR (Location-int-Request) represents a Location access Request; LIA (Location-Into-Answer) represents a Location access response.

Example 4

As shown in fig. 6, fig. 6 shows a signaling flow chart of a user calling a short message.

And when the user carries out short Message calling, the S-CSCF sends the SIP Message to the SG platform according to the configured iFC priority.

And the S-CSCF forwards the SIP Message to the IP-SMS-GW network element according to the iFC rule, and the IP-SMS-GW network element forwards the SIP Message to the SMSC through the MAP interface.

And the SG platform records the short message ticket.

In the figure, message represents a short Message calling request, and MAP MO-FSM-ACK represent short Message interaction information under a MAP protocol.

Example 5

As shown in fig. 7, fig. 7 is a signaling flowchart of a user secondary number as a short message called party.

When the user is called the message, the message center routes according to the called number, and judges the called number of the user message;

when the called number is the secondary number segment, SRI-SM routes to SG, SG converts the secondary number into a primary number, SRI-SM information is sent to HLR/HSS, and HLR/HSS returns SRI-SM-ACK information which carries IP-SMS-GW network element information.

And the SG modifies the IP-SMS-GW information into SG and returns SRI-SM-ACK to SMSC.

SMSC sends called short message MT-FSM to SG, which forwards it to IP-SMS-GW.

And the IP-SMS-GW sends the short message to the user according to the normal short message comparison flow.

As a specific embodiment, the SGW and the S-SCSF at the roaming place are also used for recording call tickets, and the call tickets of the one-card-multi-number users need to be selected and given proper preference. The SG records voice calling, called and short message records of a one-card two-number user, and can select a roaming place and a home place ticket according to IMSI or main number information for checking, so that the accuracy of a call ticket is ensured.

The embodiment further provides an apparatus 800 for implementing a VoLTE service in a roaming area with one card and multiple numbers, including:

a platform creating module 801, configured to set a signaling gateway platform, where the signaling gateway platform is connected to a home communications network where a primary number is located and a roaming communications network where a secondary number is located, respectively;

a user binding module 802, configured to bind a primary number, a secondary number, and an IMSI number of a VoLTE subscriber with one card and multiple numbers on the signaling gateway platform;

a home location configuring module 803, configured to configure a Diamter route to the signaling gateway platform by an S-CSCF network element in a home location communication network according to the IMSI number segment;

a roaming place configuring module 804, configured to configure an SIP route to the signaling gateway platform by an I-CSCF network element in a roaming place communication network according to the secondary number;

and a data interaction module 805, configured to perform data interaction with the home communications network and the roaming communications network through the signaling gateway platform, complete network registration for a single-card multi-number VoLTE subscriber, and perform routing processing on a voice call of the single-card multi-number VoLTE subscriber and a voice call of an auxiliary number as a called party.

The invention discloses a method for realizing a VoLTE service of a roaming place with one card and multiple numbers, which comprises the following steps of firstly, setting a signaling gateway platform, and connecting a communication network where a main number and an auxiliary number are positioned with the signaling gateway platform; secondly, binding a primary number, a secondary number and an IMSI number of a VoLTE user with one card and multiple numbers, and carrying out corresponding configuration on a communication network of a home location and a roaming location according to user information; and finally, performing data interaction with the communication networks of the home location and the roaming location through the signaling gateway platform, and finishing registration, voice calling and auxiliary number as the voice call routing processing of a called party for the user.

According to the invention, through the setting of the signaling gateway platform, when a user registers in an LTE network, the corresponding relation between the main number and the auxiliary number is established, so that the main number and the auxiliary number stored in the HSS are consistent, and the condition that the bearing establishment fails in the network is avoided; the user can carry out voice service through the 4G LTE network of the roaming place without closing the VoLTE switch at the mobile phone side in the roaming place, and the call can be realized without switching to a 3G or 2G network, so that the requirement of the user on the VoLTE service with one card and multiple numbers is met.

While the invention has been described with reference to specific preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.

Claims

1. A method for realizing VoLTE service of roaming place with one card and multiple numbers is characterized by comprising the following steps:

an I-CSCF network element in the roaming place communication network configures an SIP route to the signaling gateway platform according to the auxiliary number;

2. The method for implementing the VoLTE-ONLY service in the roaming area of the card with multiple numbers of claim 1, wherein the signaling gateway platform performs data interaction with the home communication network and the roaming communication network to complete network registration for the VoLTE-ONLY user, and the method comprises the following steps:

3. The method of claim 2, wherein the signaling gateway platform adds an iFC information modification to the SAA message, and the method includes: and the signaling gateway platform adds the modification of the priority of the voice calling iFC in the SAA message, wherein the modification is the lowest in the calling iFC set.

4. The method for implementing the VoLTE-ONLY roaming service according to claim 3, wherein the routing of the voice caller of the VoLTE-ONLY subscriber is performed by the signaling gateway platform performing data interaction with the home communication network and the roaming communication network, and comprises:

the signaling gateway platform judges the type of the voice call request;

5. The method for implementing VoLTE-ONLY roaming according to claim 3, wherein the data interaction between the signaling gateway platform and the home communication network and the roaming communication network is performed to route the secondary number of the VoLTE-ONLY subscriber as the called voice call, and the method comprises:

6. The method for implementing VoLTE service in roaming area of one card with multiple numbers as claimed in claim 3, further comprising:

7. The method for implementing VoLTE-over-one-card service in roaming areas according to claim 6, further comprising:

8. The method for implementing the VoLTE service with one card with multiple numbers in the roaming place according to claim 7, wherein the signaling gateway platform performs data interaction with the home communication network and the roaming place communication network to provide a route for a short message caller of the VoLTE user with one card with multiple numbers, comprising:

the IP-SMS-GW network element forwards to the SMSC over the MAP interface.

9. The method for implementing the VoLTE service with one card with multiple numbers in the roaming place according to claim 7, wherein the signaling gateway platform performs data interaction with the home communication network and the roaming place communication network to provide a route for a secondary number of a VoLTE user with one card with multiple numbers as a short message called party, comprising:

SMSC sends called short message MT-FSM to signaling gateway platform;

the signaling gateway platform forwards to the IP-SMS-GW.

10. A device for realizing VoLTE service of roaming place with one card and multiple numbers is characterized by comprising:

the platform establishing module is used for setting a signaling gateway platform which is respectively connected with a home location communication network where the main number is located and a roaming location communication network where the auxiliary number is located;