CN1929434A - Method for message intercommunication of IMS domain and CS domain - Google Patents

Abstract

A method for message intercommunication between the IMS domain and the CS domain, through the interaction between the HSS in the IMS domain and the HLR in the CS domain, to realize the intercommunication of message services between the two networks and the message service in the case of a shared number, specifically including: IMS domain P-CSCF After receiving the SIP message sent by the first UE in the domain, and forwarding the SIP message to the S-CSCF, the HSS in the domain interacts with the HLR in the CS domain to obtain the subscription information of the receiver’s second UE, and the HSS forwards the subscription information to the S-CSCF The CSCF and the S-CSCF forward the SIP message to the corresponding message gateway according to the subscription information. The message gateway performs protocol conversion, converts the SIP message into an SMPP message, and forwards the SMPP message to the second UE via the CS domain. The invention realizes the message intercommunication between the two networks through the interaction of the HSS in the IMS domain and the HLR in the CS domain, and provides smooth evolution from the existing network to the IMS.

Description

Method for message intercommunication between IMS domain and CS domain

technical field

The present invention relates to a method for message intercommunication, in particular to a method for communicating information through home subscriber server (Home Subscriber Server, hereinafter referred to as HSS) and circuit switching (Circuit-Switch, hereinafter referred to as IMS) in an IP multimedia system (IPMultimedia Subsystem, hereinafter referred to as IMS) domain. A method for realizing message intercommunication between two networks by interaction of a home location register (Home Location Register, hereinafter referred to as HLR) in a CS) domain belongs to the technical field of communication.

Background technique

Under the existing network environment, the short message service has brought rich profits to operators with its high penetration rate and rich business methods. The current short message service realizes the storage and forwarding of short messages through the dedicated short message platform Short Message Service Center (Short Message Service Center, hereinafter referred to as SMSC), and realizes the sending and receiving of messages between different points and applications and the short messages between networks through the short message gateway. intercommunication.

IMS is introduced by The 3rd Generation Partnership Project (hereinafter referred to as 3GPP) in the R5 version. It is an IP-based standard system independent of access technology. The emergence of IMS not only realizes the integration between the fixed network and the mobile network, but also integrates the application of the existing network and the network application of the future, thereby allowing users to enjoy the same services, and obtain multimedia communication services with the same experience, so as to realize the true next-generation IP converged network.

Under the network architecture of IMS, message services can be realized, and services supporting text messages, multimedia messages, file transfers, and short messages can be provided. However, how to provide converged messaging services, that is, users can send and receive messages regardless of their terminal or access network is a problem to be solved for the current IMS messaging services. Therefore, inheriting the message service on the existing network and realizing the intercommunication between the IMS network and the message service on the existing network have become issues that must be paid attention to when introducing the IMS network. In the stage of transition to IMS, the existing technology does not provide a solution for message interworking between the CS domain and the IMS domain.

Contents of the invention

In order to solve the problem of message service intercommunication between the IMS domain and the CS domain and the implementation of the message service under the condition of a shared number, the purpose of the present invention is to provide a method for message intercommunication between the IMS domain and the CS domain, through the HSS in the IMS domain and the HLR in the CS domain Interaction, to complete the query of user registration network and corresponding routing information between the two networks, to realize the intercommunication of message services and the message service under the condition of sharing numbers.

The purpose of the present invention is achieved like this:

A method for message intercommunication between an IMS domain and a CS domain, comprising:

Step 1: The IMS domain Proxy Call Session Control Function (Proxy Call Session Control Function, hereinafter referred to as P-CSCF) receives the Session Initiation Protocol (Session Initiation Protocol, hereinafter referred to as) sent by the first user equipment (User's Equipment, hereinafter referred to as UE) in the domain SIP) message, and forward the SIP message to the Serving Call Session Control Function (ServingCall Session Control Function, hereinafter referred to as S-CSCF);

Step 2: The HSS in the domain interacts with the HLR in the CS domain to obtain the subscription information of the receiver's second UE, and forwards the subscription information to the S-CSCF, and the S-CSCF forwards the SIP message to the corresponding message gateway according to the subscription information;

Step 3: The message gateway performs protocol conversion, converts the SIP message into a Short Message Peer to Peer (Short Message Peer to Peer, hereinafter referred to as SMPP) message, and forwards the SMPP message to the second UE via the CS domain.

Said step 2 includes:

Step 20: S-CSCF triggers to the Message Server (Message Server) according to the Initial Filter Criteria (hereinafter referred to as iFC);

Step 21: The message server returns the message that needs to be rerouted to the S-CSCF;

Step 22: The S-CSCF queries the HSS for the subscription information of the receiver's second UE through an interface;

Step 23: The HSS finds that the second UE is not an IMS domain user, and queries the HLR of the CS domain for the subscription information of the second UE;

Step 24: The HLR returns the subscription information of the second UE to the HSS;

Step 25: The HSS sends the subscription information of the second UE to the S-CSCF;

Step 26: The S-CSCF directly sends the SIP message to the corresponding message gateway according to the subscription information, or the S-CSCF returns the subscription information to the message server, and the message server sends the SIP message to the corresponding message gateway according to the configuration policy.

Described step 3 comprises: message gateway carries out protocol conversion, SIP message is converted into SMPP message, and SMPP message is sent to SMSC, and SMSC inquires HLR and obtains the second UE's current place of visit information, and then SMPP message is passed through Mobile Switching Center /Visited Location Register (Mobile SwitchCenter/Visited Location Register, hereinafter referred to as MSC/VLR) is sent to the second UE.

A method for message intercommunication between an IMS domain and a CS domain, comprising:

Step 1': the MSC/VLR in the CS domain receives the SMPP message sent by the second UE in the domain, and forwards the SMPP message to the SMSC;

Step 2': the HLR in the domain interacts with the HSS in the IMS domain to obtain the subscription information of the receiver's first UE, and forwards the subscription information to the SMSC, and the SMSC forwards the SMPP message to the corresponding message gateway according to the subscription information;

Step 3': The message gateway performs protocol conversion, converts the SMPP message into a SIP message, and forwards the SIP message to the first UE via the IMS domain.

Described step 2 ' comprises:

Step 20': SMSC queries the subscription information of the receiving party's first UE to the HLR;

Step 21': HLR finds that the first UE is not a CS domain user, and queries the subscription information of the first UE to the HSS in the IMS domain;

Step 22': the HSS returns the subscription information of the first UE to the HLR;

Step 23': HLR returns the subscription information of the first UE to SMSC;

Step 24': The SMSC sends the SMPP message to the corresponding message gateway according to the subscription information.

The step 3' includes: the message gateway performs protocol conversion, converts the SMPP message into a SIP message, and forwards the SIP message to the message server at the home location of the first UE in the IMS domain, and the message server forwards the SIP message to the S-CSCF, The S-CSCF then forwards the SIP message to the first UE via the P-CSCF.

There is also a situation in the step 3', including:

Step 30': the message gateway performs protocol conversion, converts the SMPP message into a SIP message, and forwards the SIP message to the Interrogating Call Session Control Function (Interrogating Call Session Control Function, hereinafter referred to as I-CSCF);

Step 31': The I-CSCF queries the HSS for the routing information of the S-CSCF serving the first UE;

Step 32': The HSS returns the routing information of the S-CSCF serving the first UE to the I-CSCF;

Step 33': I-CSCF sends the SIP message to the corresponding S-CSCF according to the routing information;

Step 34': S-CSCF triggers to the message server of the first UE;

Step 35': the message server returns the message to the S-CSCF;

Step 36': The S-CSCF forwards the SIP message to the first UE via the P-CSCF.

In said step 2 and step 2', the interaction between the HSS and the HLR is through the No. 7 signaling system (CommonChannel Signaling System No.7, hereinafter referred to as SS7) interface, with the mobile application part (Mobile Application Part, hereinafter referred to as MAP) The message form is complete.

Through the interaction between the HSS in the IMS domain and the HLR in the CS domain, the present invention completes the query of the user registration network and the corresponding routing information between the two networks, realizes the intercommunication of message services, introduces the IMS network, and realizes the real next-generation IP Converged network smooth evolution.

Description of drawings

Fig. 1 is a flow chart of the scheme 1 for HSS and HLR to realize intercommunication between the two networks when a SIP message is sent from the IMS domain to the CS domain in the present invention.

Fig. 2 is a flow chart of scheme 1 of HSS and HLR interacting to realize intercommunication between two networks when an SMPP message is sent from CS domain to IMS domain in the present invention.

Fig. 3 is a partial flow chart of the scheme 2 of HSS and HLR interacting to realize the intercommunication between the two networks when the SMPP message is sent from the CS domain to the IMS domain in the present invention.

Detailed ways

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Example 1:

Referring to Figure 1, the message service flow steps from the IMS domain to the CS domain are as follows:

Step 1a: The P-CSCF receives the SIP message sent by the first UE in the IMS domain, and forwards the SIP message to the S-CSCF,

P-CSCF is the first connection point from the access network to IMS, and is the proxy server in SIP, which is responsible for accepting requests or responses and forwarding them.

S-CSCF performs session control services, including registering and maintaining session status, and acts as a SIP server;

Step 1b: S-CSCF triggers to message server according to iFC,

iFC is the description of the user contract downloaded from the HSS when the user registers,

The message server can judge whether it is sent to the mobile terminal according to the receiving address of the message, and supports text messages, multimedia messages, file transfers, short messages, etc.;

Step 1c: The message server returns the message that needs to be rerouted to the S-CSCF;

Step 1d: The S-CSCF queries the HSS for the subscription information of the receiver's second UE through the Cx interface,

The Cx interface is the interface for the HSS to provide the user's location and subscription information to the I-CSCF and S-CSCF in the IMS standard. Weight parameters and filter parameters, etc.,

HSS is a network database that supports user registration and stores user identity, location data and filtering policy information, and is also responsible for the management of user authentication and authorization control information for network access;

Step 1e: The HSS finds that the second UE is not an IMS domain user, and queries the HLR of the CS domain for the subscription information of the second UE,

HLR is a basic functional unit in the mobile communication network system, used to store mobile user data, including mobile user service characteristics, location information and activity status, and manage mobile users;

Step 1f: the HLR returns the subscription information of the second UE to the HSS;

Step 1g: The HSS sends the subscription information of the second UE to the S-CSCF;

Step 1h: The S-CSCF directly sends the SIP message to the corresponding message gateway according to the subscription information;

Step 1i: The message gateway performs protocol conversion, converts the SIP message into an SMPP message, and sends the SMPP message to the SMSC,

The IMS domain uses SIP as the call and service control protocol, and the SMPP protocol is used between the message gateway and the SMSC;

Step 1j: The SMSC inquires the HLR about the current destination information of the second UE;

Step 1k: the HLR returns the current visiting location information of the second UE to the SMSC;

Step 11: The SMSC sends the SMPP message to the second UE via the MSC/VLR,

MSC provides the interface between the Public Switched Telephone Network (hereinafter referred to as PSTN) and the mobile network, and controls the call establishment and routing establishment process.

VLR stores all relevant information of mobile subscribers in its coverage area so that MSC can set up incoming and outgoing calls.

Example 2:

The difference from Embodiment 1 lies in step 1h. In this embodiment, the S-CSCF does not have the routing function directly to the message gateway, so the S-CSCF first returns the subscription information of the second UE to the message server, and the message server then Send the SIP message to the corresponding message gateway.

Example 3:

Referring to Figure 2, the message service flow steps from the CS domain to the IMS domain are as follows:

Step 3a: The MSC/VLR receives the SMPP message sent by the second UE in the CS domain, and forwards it to the SMSC;

Step 3b: The SMSC queries the HLR for the subscription information of the receiving party's first UE;

Step 3c: The HLR finds that the first UE is not a CS domain user, and queries the HSS of the IMS domain for the subscription information of the first UE;

Step 3d: The HSS returns the subscription information of the first UE to the HLR;

Step 3e: the HLR returns the subscription information of the first UE to the SMSC;

Step 3f: The SMSC sends the SMPP message to the corresponding message gateway according to the subscription information;

Step 3g: The message gateway performs protocol conversion, converts the SMPP message into a SIP message, and forwards the SIP message to the message server at the home location of the first UE in the IMS domain;

Step 3h: The message server forwards the SIP message to the first UE via the S-CSCF and P-CSCF of the home of the first UE.

Example 4:

The difference from Embodiment 3 lies in step 3h. In this embodiment, the message gateway does not have the routing function directly to the message server, so the SIP message is first sent to the I-CSCF, and then sent according to the flow of the IMS domain, see Fig. 3. The specific steps are as follows:

Step 4h0: The message gateway performs protocol conversion, converts the SMPP message into a SIP message, and forwards the SIP message to the I-CSCF,

The I-CSCF is an interface for the external network to access the IMS to interact with it. It is used to flexibly select the corresponding S-CSCF for each call, request to the HSS, and search the user attributes in the HSS to determine which S-CSCF or S-CSCF is used. To serve the user, if there are multiple S-CSCFs to complete the load sharing, the I-CSCF is used to complete the allocation of these S-CSCFs;

Step 4h1: The I-CSCF queries the HSS for the routing information of the S-CSCF serving the first UE;

Step 4h2: The HSS returns the routing information of the S-CSCF serving the first UE to the I-CSCF;

Step 4h3: The I-CSCF sends the SIP message to the corresponding S-CSCF according to the routing information;

Step 4h4: S-CSCF triggers to the message server of the first UE;

Step 4h5: The message server returns the message to the S-CSCF,

The message is a signaling message based on the SIP protocol;

Step 4h6: S-CSCF sends the SIP message to the first UE via PSCSF.

Example 5:

In actual use, there is also a case of sharing a number, that is, a certain UE can register in both the IMS domain and the CS domain. When the UE is located in the IMS domain, the subscription information of the UE is stored in the HSS, and the process of communicating messages between the UE and another UE in the CS domain is the same as that in Embodiment 1-4; otherwise, when the UE is located in the CS domain, the HLR The subscription information of the UE is stored, and the process of message interworking between the UE and another UE in the IMS domain is also the same as that in Embodiments 1-4.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be The scheme shall be modified or equivalently replaced without departing from the spirit and scope of the technical scheme of the present invention.

Claims (9)

1, the method for a kind of IMS territory and the intercommunication of CS domain message is characterized in that, comprising:

Proxy Call Session Control Function unit, step 1:IMS territory receives the conversation initiating protocol message that first subscriber equipment sends in the territory, and this conversation initiating protocol message is forwarded to the service call conversation control function unit;

Step 2: in the territory in home signature user server and the CS territory attaching position register obtain the CAMEL-Subscription-Information of recipient's second subscriber equipment alternately, and CAMEL-Subscription-Information is transmitted to the service call conversation control function unit, the service call conversation control function unit is forwarded to corresponding information gateway to conversation initiating protocol message according to CAMEL-Subscription-Information;

Step 3: information gateway carries out protocol conversion, converts the session initiation protocol message to Short Message Peer to Peer message, and gives second subscriber equipment Short Message Peer to Peer forwards through the CS territory.

2, method according to claim 1 is characterized in that, described step 2 comprises:

Step 20: the service call conversation control function unit is triggered to message server according to initial filter criteria;

Step 21: message server returns the message that needs to re-route and arrives the service call conversation control function unit;

Step 22: the service call conversation control function unit is by the CAMEL-Subscription-Information of interface to home signature user server inquiry recipient second subscriber equipment;

Step 23: home signature user server finds that second subscriber equipment is not IMS territory user, inquires about the CAMEL-Subscription-Information of second subscriber equipment to the attaching position register in CS territory;

Step 24: attaching position register returns the CAMEL-Subscription-Information of second subscriber equipment to home signature user server;

Step 25: home signature user server sends to the service call conversation control function unit with the CAMEL-Subscription-Information of second subscriber equipment;

Step 26: the service call conversation control function unit directly sends conversation initiating protocol message according to CAMEL-Subscription-Information and returns CAMEL-Subscription-Information to message server to corresponding information gateway or service call conversation control function unit, and message server sends to corresponding information gateway according to collocation strategy with the session initiation protocol message again.

3, method according to claim 1, it is characterized in that, described step 3 comprises: information gateway carries out protocol conversion, convert the session initiation protocol message to Short Message Peer to Peer message, and Short Message Peer to Peer message sent to SMS service center, SMS service center inquiry attaching position register obtains the present visit ground information of second subscriber equipment, again Short Message Peer to Peer message is sent to second subscriber equipment via mobile switching center.

4, method according to claim 1 is characterized in that, home signature user server and attaching position register is mutual by the No.7 signalling system interface in the described step 2, finishes with the MAP form of message.

5, the method for a kind of IMS territory and the intercommunication of CS domain message is characterized in that, comprising:

Step 1 ': CS territory mobile switching center receives the Short Message Peer to Peer message that second subscriber equipment sends in the territory, and this Short Message Peer to Peer forwards is arrived SMS service center;

Step 2 ': in the territory in attaching position register and the IMS territory home signature user server obtain the CAMEL-Subscription-Information of recipient's first subscriber equipment alternately, and CAMEL-Subscription-Information is forwarded to SMS service center, SMS service center according to CAMEL-Subscription-Information the Short Message Peer to Peer forwards to corresponding information gateway;

Step 3 ': information gateway carries out protocol conversion, and the Short Message Peer to Peer message conversion is become conversation initiating protocol message, and through the IMS territory conversation initiating protocol message is transmitted to first subscriber equipment.

6, method according to claim 5 is characterized in that, described step 2 ' comprising:

Step 20 ': SMS service center is to the CAMEL-Subscription-Information of attaching position register inquiry recipient first subscriber equipment;

Step 21 ': attaching position register finds that first subscriber equipment is not CS territory user, inquires about the CAMEL-Subscription-Information of first subscriber equipment to the home signature user server in IMS territory;

Step 22 ': home signature user server returns the CAMEL-Subscription-Information of first subscriber equipment to attaching position register;

Step 23 ': attaching position register returns the CAMEL-Subscription-Information of first subscriber equipment to SMS service center;

Step 24 ': SMS service center is dealt into corresponding information gateway according to CAMEL-Subscription-Information with Short Message Peer to Peer message.

7, method according to claim 5, it is characterized in that, described step 3 ' comprising: information gateway carries out protocol conversion, the Short Message Peer to Peer message conversion is become conversation initiating protocol message, and the session initiation protocol message is forwarded to the message server of the IMS territory first subscriber equipment ownership place, message server is forwarded to the service call conversation control function unit with the session initiation protocol message, and the service call conversation control function unit is given first subscriber equipment with the session initiation protocol message via the Proxy Call Session Control Function unit forwards.

8, method according to claim 5 is characterized in that, described step 3 ' comprising:

Step 30 ': information gateway carries out protocol conversion, and the Short Message Peer to Peer message conversion is become conversation initiating protocol message, and the session initiation protocol message is forwarded to query call conversation control function unit.

Step 31 ': query call conversation control function unit is the routing iinformation of the service call conversation control function unit of first subscriber equipment service to the home signature user server inquiry;

Step 32 ': home signature user server is returned as the routing iinformation of service call conversation control function unit of first subscriber equipment service to query call conversation control function unit;

Step 33 ': query call conversation control function unit sends to corresponding service call conversation control function unit according to routing iinformation with the session initiation protocol message;

Step 34 ': the service call conversation control function unit triggers is to the message server of first subscriber equipment;

Step 35 ': the message server return messages are to the service call conversation control function unit;

Step 36 ': the service call conversation control function unit is given first subscriber equipment with the session initiation protocol message via the Proxy Call Session Control Function unit forwards.

9, method according to claim 5 is characterized in that, described step 2 ' in home signature user server and attaching position register mutual by the No.7 signalling system interface, finish with the MAP form of message.

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