CN102420816A - Method, system and device for establishing control relevance relationship - Google Patents

Abstract

The invention discloses a method for establishing a control association relationship, which includes the following steps: a first network entity acquires address information of a second network entity; and the first network entity sends its own address information to the second network entity. The invention also discloses a system for establishing a control association relationship, an access adaptation unit and a CS domain control function entity. In the embodiment of the present invention, the L-CAAF-n can learn whether the user is an ICS user and the address of the ICCF, and then establish a control association relationship between the L-CAAF-n and the ICCF.

Description

A method, system and device for establishing a control relationship

technical field

The present invention relates to the field of communication technologies, and in particular to a method, system and equipment for establishing a control association relationship.

Background technique

IMS (IP Multimedia Subsystem, IP Multimedia Subsystem) is a WCDMA (Wideband Code Division Multiple Access) defined by the 3GPP (3rd Generation Partnership Project, third-generation mobile communication standardization partner project) R5/R6 standard The IP multimedia subsystem in the network is the target network for the 3G mobile network to realize packet voice and packet data and provide unified multimedia services and applications. The IMS uses the IP packet domain as the bearer channel for its control signaling and media transmission, and uses the SIP (Session Initiation Protocol, Session Initiation Protocol) protocol as the call control signaling. In IMS, the user subscription data of IMS is managed centrally in HSS (Home Subscriber Server, belonging to the subscriber server), the service is provided by the application server AS (Application Server, application server), and the session control is controlled by CSCF (Call Session Control Function, The call session control function) is completed, the two are completely separated in the network structure, and the service is triggered to the AS for processing through the S-CSCF (Serving CSCF, Serving CSCF), and multiple ASs can work together. The user accesses the IMS through the current P-CSCF (Proxy CSCF, proxy CSCF), and the session and service control are completed by the service node in the home domain where the user is registered. Therefore, the user can always get the same service at different access points, realizing It realizes the separation of service management, session control and bearer access, as well as service provision independent of access and location.

IMS is the description of 3GPP and TISPAN. In 3GPP2, there is also a similar multimedia subsystem called MMD (Multimedia Domain, Multimedia Domain). Obviously the methods described below are equally applicable to MMD.

During the evolution of the network to IMS, there will be a period of time when CS (Circuit Switch, circuit switching) and IMS coexist. At this time, operators hope that there is a control point in the network that can centrally control the services of the two domains. In order to reduce deployment and management costs and provide a consistent service experience, this centralized control point is generally located in the IMS network and implemented by the AS. That is, when a user accesses through the CS network, services are also provided for the user on the IMS network.

At present, this topic is involved in the centralized service control of 3GPP and TISPAN, etc., as shown in Figure 1, which describes the structure of ICS (IMS Centralized Service, centralized service control). Among them, L-CAAF-n (Local-CS Access Adaptation Function-Network, local CS access adaptation function entity on the network side) is a newly added entity, which can be placed in UE (User Equipment, user equipment) and MSC ( Mobile Switch Center (Mobile Switching Center) can be set separately, or can be put together with MSC, mainly to identify whether the user is an ICS user, and if the user is an ICS user, further transfer some CS domain signaling and SIP signaling of the user SIP signaling is converted to each other, and the converted SIP signaling is sent to ICCF (IMS CS Control Function, CS Domain Control Functional Entity). It can be said that L-CAAF-n is an access adaptation unit, which has the capability of converting CS domain signaling Adapted to the function of SIP signaling; ICCF is an AS with UA function, acting as the agent of the user in the IMS domain, and accessing the IMS domain instead of the user. When an ICS user accesses through the CS domain, L-CAAF-n needs to send the converted SIP signaling to the ICCF, and the ICCF replaces the user to access the IMS domain. It can be said that the ICCF is a CS domain control functional entity that controls This is when the user accesses the IMS domain through the CS domain. For different ICS users, their ICCF may be different. When an ICS user arrives at an L-CAAF-n for the first time, the L-CAAF-n does not have the address of the user's ICCF, and the L-CAAF-n cannot The converted SIP signaling is sent to ICCF, so how L-CAAF-n obtains the address of ICCF becomes an urgent problem to be solved. At the same time, how L-CAAF-n judges whether the user is an ICS user is also a problem that needs to be solved.

Contents of the invention

Embodiments of the present invention provide a method, system, and device for establishing a control association relationship, so that the L-CAAF-n can establish a control association relationship between the L-CAAF-n and the ICCF for an ICS user.

An embodiment of the present invention provides a method for establishing a control association relationship, including the following steps:

The first network entity acquires address information of the second network entity;

The first network entity sends its own address information to the second network entity.

An embodiment of the present invention provides a method for determining whether a user is an ICS user, including the following steps:

The access adaptation unit obtains the subscription information of the user;

The access adaptation unit acquires information that the user is an ICS user from the subscription information of the user.

An embodiment of the present invention provides a system for establishing a control association relationship, including:

The access adaptation unit is configured to obtain the address information of the circuit CS domain control functional entity after determining that the user is an ICS user, and notify the CS domain information of the user to the CS domain control functional entity, the CS domain information includes the access to the address information of the adaptation unit;

The CS domain control function entity is configured to acquire the address information of the access adaptation unit, and provide the access unit with its own address information.

An embodiment of the present invention provides an access adaptation unit, including:

The ICS user judging subunit is used to judge whether the user is an ICS user;

The CS domain control function entity address acquisition subunit is connected to the ICS user judgment subunit, and is used to obtain the address information of the circuit CS domain control function entity after determining that the user is an ICS user;

The CS domain information sending subunit is connected to the CS domain control function entity address acquisition subunit, and is used for notifying the CS domain information of the user to the CS domain control function entity.

An embodiment of the present invention provides a CS domain control function entity, including:

The access adaptation unit address acquisition subunit is used to acquire the address information of the access adaptation unit;

The CS domain control function entity address providing subunit is configured to provide the access unit with its own address information.

Through the embodiment of the present invention, L-CAAF-n can learn whether the user is an ICS user through the subscription information of the user. When the user is an ICS user, it can obtain the address information of the ICCF, and send its own address information to the ICCF, so that Both the L-CAAF-n and the ICCF know each other's addresses, and then a control association relationship can be established between the L-CAAF-n and the ICCF.

Description of drawings

FIG. 1 is a structural diagram of an ICS system in the prior art;

Fig. 2 is the flow chart of the method for acquiring that the user is an ICS user in L-CAAF-n in Embodiment 1 of the present invention;

Fig. 3 a is a flow chart of a method for obtaining an ICCF address by using USSD (Unstructured Supplementary ServiceData, Unstructured Supplementary Data Service) in Embodiment 2 of the present invention;

FIG. 3b is a flowchart of another method for obtaining an ICCF address in Embodiment 2 of the present invention;

Fig. 4 utilizes CAMEL to report VLR (Visit Location Register, visiting location register) number method flowchart in the embodiment of the present invention three;

FIG. 5 is a flowchart of a method for issuing a VLR number by the HSS in Embodiment 4 of the present invention;

FIG. 6 is a flowchart of a method for constructing an ICCF address in Embodiment 5 of the present invention;

FIG. 7 is a flow chart of the iFC triggering method in Embodiment 6 of the present invention;

FIG. 8 is a structural diagram of an access adaptation unit in an embodiment of the present invention;

FIG. 9 is a structural diagram of a CS domain control function entity in an embodiment of the present invention.

Detailed ways

The establishment of a control association relationship mentioned in the embodiment of the present invention means that the access adaptation unit and the CS domain access control functional entity know each other's address information. The registration of the CS domain includes the location update after the Attach of the user from power off to power on, and the location update of the user across MSC/VLR.

In the following embodiments, it is assumed that the user does not attach to the CS domain at the beginning, and then performs a normal CS domain attach process and location update process. When the user is performing location update, the extended MAP message (for example, MAP_UPDATE_LOCATION message) can be used to identify that the visited place of the user supports L-CAAF-n, so that the HLR can identify the visited place to support L-CAAF-n, and then send the data When identifying the user as an ICS user.

In the first embodiment of the present invention, it is described how L-CAAF-n knows whether the user is an ICS user. The specific process is shown in Figure 2, including the following steps:

Step s201-step s203, the user does not attach (Attach) in the CS domain at first, and then performs the normal CS domain attachment process and location update process.

In step s204, the HSS sends information that the user is an ICS user to the L-CAAF-n through a MAP-Insert-Subscribe-Data message. Specifically, the method for identifying the user as an ICS user in MAP-Insert-Subscribe-Data includes but is not limited to the following methods: one is to add a new SS-Code or other suitable fields in MAP_Insert-Subscribe-Data Value, used to indicate that the user is an ICS user, that is, ICS is treated as a supplementary service. If L-CAAF-n finds that the user has ICS services, it will register to IMS instead of the user; otherwise, it will not register to IMS instead of the user; the other One is to add a new field in MAP_Insert-Subscribe-Data to identify the user as an ICS user.

In this embodiment, if L-CAAF-n is set separately, L-CAAF-n needs to VLR or HLR (Home Location Register, Home Location Register) to inquire whether the user is an ICS user. If a new interface is added between the L-CAAF-n and the HSS, the L-CAAF-n can also obtain user information through the newly added interface. L-CAAF-n can simulate the existing functional entity, obtain user subscription information from HSS through Cx or SH interface, and L-CAAF-n can subscribe or query user subscription information through SH interface or CX interface. In addition, if the access adaptation unit receives the SIP message sent by the CS domain control functional entity, it means that the user has a "CS domain control functional entity", which means that the user is an ICS user, and then decides to notify the CS domain control functional entity Information about the CS domain of the functional entity user.

In the following examples, the user is an ICS user as an example. If the user is not an ICS user, L-CAAF-n only needs to transparently transmit the user's message, and the MSC will process the user's request message.

In Embodiment 2 of the present invention, the process of using USSD to obtain the address of ICCF is shown in Figure 3a, including the following steps:

In steps s301a-s303a, the user performs normal CS domain location update.

In step s304a, the L-CAAF-n finds that the user needs to notify the ICCF of the user's CS domain registration.

In step s305a, the L-CAAF-n sends a USSD message to the HSS/HLR to obtain the address of the user's ICCF.

In step s306a, the HSS returns the address of the ICCF to the L-CAAF-n through the USSD message. Among them, the ICCF address returned by the HSS can be the address of the user's ICCF configured in the HSS, or the HSS can obtain the address of the ICCF after querying a certain fixed place (such as a database storing the ICCF addresses of all users), Then return L-CAAF-n by HSS.

In step s307a, the L-CAAF-n sends an Info message to the ICCF, notifying the ICCF that the user has registered in the CS domain. In this embodiment, it is only taken as an example to send an Info message, and the L-CAAF-can also send a Register message, etc., and the Info message may also carry the address information of the L-CAAF-n.

In step s308a, the ICCF registers with the IMS domain instead of the user.

In addition to step s305a to step s307a where L-CAAF-n sends a USSD message to the HSS to obtain the query, the L-CAAF-n can also directly send a USSD message to the ICCF to query its PSI address. One of its specific routing methods may be: the USSD message sent by L-CAAF-n is first routed to an entity with the function of distributing USSD messages. Since this entity is equipped with the address of the user ICCF, it can be sent by this entity. The USSD message is specifically routed to the user's ICCF. The specific implementation process is shown in Figure 3b, including the following steps:

In steps s301b-s303b, the user performs normal CS domain location update.

In step s304b, the L-CAAF-n finds that the user needs to notify the ICCF of the CS domain attachment information of the user.

In step s305b, the L-CAAF-n initiates a USSD message, fetches its PSI from the ICCF, and routes the USSD message to the USSD gateway.

In step s306b, the USSD gateway forwards the USSD message to the user's ICCF.

In step s307b and step s308b, the ICCF returns its own PSI through the USSD message.

In step s309b, the L-CAAF-n notifies the ICCF that the user is registered in the CS domain by using the info message.

In step s310b, the ICCF registers with the IMS instead of the user.

In this embodiment, the query message sent by the user is an unstructured supplementary data service USSD as an example. In addition, the L-CAAF-N can also use short text SMS, Diameter messages and other queries.

In the third embodiment of the present invention, CAMEL can be used to report the VLR number, and the specific process is as shown in Figure 4, including the following steps:

In steps s401-s403, the user performs normal CS domain location update.

In step s404, the VMSC uses the MAP-NOTE-MM-EVENT message in the CAMEL to report the current VLR number of the user to the ICCF.

Step s405, ICCF constructs the address of L-CAAF-n according to the reported VLR number. Since the VLR number (including the PLMN (Public Land Mobile Network, public land mobile system) number) is unique in the world, and L-CAAF-n is in one-to-one correspondence with the VLR, ICCF must be able to uniquely address the VLR number A L-CAAF-n. Among them, the method of addressing L-CAAF-n by ICCF includes but is not limited to the following methods; one is that ICCF constructs the address of the URI of L-CAAF-n according to the VLR number: for example, "VLR number" "PLMN identifier where the VLR is located " and other ways; the other is to configure the ICCF address corresponding to the VLR in the ICCF.

Step s406, ICCF sends its own address to L-CAAF-n through a SIP message. In addition to the address of ICCF, the SIP message may also contain information such as that the user is an ICS user, so as to trigger L-CAAF-n to issue a Register information. The SIP message may be Info or other suitable messages.

In step s407, after receiving the address of the ICCF, the L-CAAF-n sends a Register message to the ICCF to notify the ICCF that the user has registered in the CS domain. In this embodiment, the Register message is taken as an example, and the L-CAAF may also send an Info message.

The SCP in this embodiment may be set up together with the ICCF, or may be set up separately from the ICCF. If they are set up together, the VLR number reported by the user will be transmitted between them through internal messages; if they are set up separately, they will need to be passed through the external interface between them. VLR number.

In Embodiment 4 of the present invention, the flow of the method for issuing the VLR number by the HSS is shown in Figure 5, which includes the following steps:

In step s501, the ICCF sends a Subscribe message to the HSS through the SH interface, subscribing to the VLR number where the user is located.

Step s502-step s504, the user performs normal CS domain location update.

In step s505, the HSS sends the current VLR number of the user to the ICCF through the SH interface according to the ICCF subscription.

Step s506, ICCF constructs the address of L-CAAF-n according to the received VLR number. Since the VLR number (including the PLMN number) is unique in the world, and the L-CAAF-n is in one-to-one correspondence with the VLR, the ICCF must be able to uniquely address an L-CAAF-n according to the VLR number. Among them, the method of addressing L-CAAF-n by ICCF includes but is not limited to the following methods: one is that ICCF constructs the address of the URI of L-CAAF-n according to the VLR number: for example, "VLR number" "PLMN identifier where the VLR is located " and other ways; the other is to configure the ICCF address corresponding to the VLR in the ICCF.

In step s507, the ICCF sends its own address to the L-CAAF-n through a SIP message, and the SIP message may be Info or the like. In addition to the address of the ICCF, the SIP message may also include information such as that the user is an ICS user.

Step s508, the user initiates a call to L-CAAF-n

In step s509, the L-CAAF-n sends an Invite message to the ICCF according to the call initiated by the user and the address of the ICCF acquired in step s507. The L-CAAF-n triggers the L-CAAF-n to send the invite message by receiving the address of the ICCF and the call request message sent by the terminal.

In this embodiment, the ICCF will first determine that the user is an ICS user before performing the operation of subscribing to the VLR number of the user.

In Embodiment 5 of the present invention, the flow of the method for constructing an ICCF address is shown in Figure 6, including the following steps:

Step s601-step s603, the user performs normal CS domain location update.

In step s604, the L-CAAF-n finds that it is necessary to notify the ICCF that the user has registered in the CS domain, and thus constructs the address of the user's ICCF. Among them, the method for L-CAAF-n to obtain the ICCF address includes the following methods: one is the method of constructing the URI address, "user's HLR number + special user number" "PLMN identification of the home domain" and other methods; the other is If the address of the user's ICCF is configured in L-CAAF-n, there is no need to construct it, and the configured address can be used directly.

In step s605, according to the address of ICCF constructed in step s604, notify the ICCF that the user has registered in the CS domain. The notification message may be an info message or other appropriate SIP messages. The message may also carry address information of the L-CAAF-n.

In steps s604 and s605, it is just an example that L-CAAF-n perceives that the ICCF user needs to register in the CS domain. In fact, it may also be that L-CAFF-n initiates a Register message to ICCF, and when the user initiates a call, Initiate the invite message to ICCF, etc.

The flow of the iFC triggering method in Embodiment 6 of the present invention is shown in FIG. 7 , including the following steps:

Step s701-step s703, the user performs normal CS domain location update.

In step s704, L-CAAF-n constructs a SIP message according to the user's IMSI or MSISDN. The SIP message constructed by L-CAAF-n may be Info and other messages.

Step s705, L-CAAF-n sends the message to S-CSCF. The message may also carry address information of the L-CAAF-n.

In step s706, the S-CSCF triggers the message to the ICCF via the iFC.

Step s708-step s709, ICCF returns its own address information in the response message. The ICCF may also return its own address information through a new SIP message.

In step s710, the L-CAAF-n registers to the IMS domain instead of the user.

The embodiment of the present invention also provides a system for establishing a control association relationship, including an access adaptation unit, which is used to obtain the address information of the circuit CS domain control functional entity after determining that the user is an ICS user, and store the user's CS domain information Informing the CS domain control function entity that the CS domain information includes the address information of the access adaptation unit; the CS domain control function entity is configured to obtain the address information of the access adaptation unit, and provide the The access unit provides its own address information.

Wherein, the access adaptation unit is shown in FIG. 8 , and specifically includes: an ICS user judging subunit 110, configured to judge whether the user is an ICS user, for example, the first network entity obtains the ICS user from a MAP message, SH or Cx interface message According to the subscription information of the user, it is judged whether the user is an ICS user according to the subscription information; the CS domain control function entity address acquisition subunit 120 is connected with the ICS user judgment subunit for determining that the user is an ICS user, and obtains The circuit CS domain controls the address information of the functional entity, for example, initiates USSD, SMS, Diameter and other query messages to the HSS to obtain the address information of the user's second network entity, or directly sends a query message to the second network entity to query its PSI address The CS domain information sending subunit 130 is connected to the CS domain control function entity address acquisition subunit 120, and is used to notify the CS domain control function entity of the user's CS domain information.

The CS domain control function entity address acquisition subunit 120 specifically includes: a query acquisition address module 121, configured to send a query message to the HSS to obtain the address information of the user's CS domain control function entity ICCF.

Constructing an address acquisition module 122 for accessing the adaptation unit to acquire at least one of the following numbers: the user's International Mobile Subscriber Identity IMSI number, the corresponding mobile station ISDN number MSISDN number, and constructing the CS domain control domain to which the user belongs according to the number Address information of the functional entity.

Trigger the acquisition address module 123, which is used for the access adaptation unit to construct the user's universal resource identifier URI through at least one of the following numbers, the user's IMSI number, or the corresponding MSISDN number, and the access adaptation unit sends the SIP request to The service call session control function S-CSCF in the home domain makes the S-CSCF reach the CS domain control function entity through iFC trigger, and then the CS domain control function entity sends its own address information to the access adaptation unit.

The address pre-configuration module 124 is used for the access adaptation unit to pre-configure address information of CS domain control functional entities of all users.

Among them, the CS domain control function entity is shown in Figure 9, specifically includes: an access adaptation unit address acquisition subunit 210, which is used to acquire the address information of the access adaptation unit, one way is to obtain the VLR number where the user is currently located Constructing the address of the first network entity, wherein the method of obtaining the VLR number includes receiving a message sent by the VLR, the message carrying the VLR number where the user is currently located; or receiving a message sent by the HSS, the message carrying The VLR number where the user is currently located. The CS domain control function entity address providing subunit 220 is configured to provide the access unit with its own address information.

The access adaptation unit address obtaining subunit 210 specifically includes: an access adaptation unit address construction module 211, which is used to construct the address of the access adaptation unit by obtaining the VLR number of the user's current visitor location register; The unit address obtaining module 212 is configured to obtain the address directly from the message sent by the access adaptation unit.

Through the embodiment of the present invention, L-CAAF-n can know whether the user is an ICS user through the user's subscription information, and when the user is an ICS user, can obtain the address information of the ICCF, and send its own address information to the ICCF, or It is ICCF that first obtains the address information of L-CAAF-n, and then sends its own address to L-CAAF-n, so that both L-CAAF-n and ICCF know each other's addresses, so that L-CAAF-n Established a control relationship with ICCF.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be realized by means of software plus a necessary general-purpose hardware platform, and of course it can also be realized by hardware, but in many cases the former is better implementation. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions to make a A computer device (which may be a personal computer, a server, or a network device, etc.) executes the methods described in various embodiments of the present invention.

The above disclosures are only a few specific embodiments of the present invention, however, the present invention is not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the present invention.

Claims (3)

1. whether a definite user is ICS user's method, it is characterized in that, may further comprise the steps:

Insert the CAMEL-Subscription-Information that adaptation unit obtains the user;

Insert adaptation unit and from user's CAMEL-Subscription-Information, obtain the information that the user is ICS user.

2. confirm described in claim 1 that whether the user is ICS user's method, it is characterized in that, inserts adaptation unit obtains the user through MAP MAP message, SH or Cx interface message CAMEL-Subscription-Information.

3. confirm described in claim 2 whether the user is ICS user's method; It is characterized in that; When the passing through MAP message and obtain user's CAMEL-Subscription-Information of user; Through the SS-Code in MAP_Insert-Subscribe-Data or other fields that is fit to, increase new value, be used for showing that the user is ICS user;

Or in MAP_Insert-Subscribe-Data, increasing new field, to be used for identifying user be ICS user.

Images