WO2008113292A1

WO2008113292A1 - A method, apparatus and system for obtaining cs domain attaching state

Info

Publication number: WO2008113292A1
Application number: PCT/CN2008/070498
Authority: WO
Inventors: Dongming Zhu; Hengliang Zhang; Chunyan Ding; Songhai Ye
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-03-16
Filing date: 2008-03-14
Publication date: 2008-09-25
Also published as: CN101267657A

Abstract

A method, an apparatus and a system for obtaining CS domain attaching state can make an AS obtain the attaching state of a UE in the CS domain. And an IMS domain multiple register method and apparatus can avoid to activate the logout of corresponding hidden register group when a de-register is initiated in an access domain in a multiple register situation. The method for obtaining CS domain attaching state includes: acquiring the attaching state information of a UE in the CS domain by a user agent network element; and notifying the attaching state information of the UE in the CS domain to an AS by the user agent network element.

Description

Method, device and system for sensing circuit state attachment state

Technical field

The present invention relates to the field of communications, and in particular, to a method, apparatus, and system for sensing a state of attachment of a circuit domain, and a method and apparatus for multiple registration of an IMS domain. Background technique

In the process of the evolution of the communication network by Circuit Switched (CS) to the IP Multimedia Subsystem (IMS), CS and IMS are a process of coexistence and gradual replacement. In the IMS, users who access the IMS through either IP access or CS can provide services separately or simultaneously. The key to achieving the above requirements is that the IMS network can know the attachment status of the user in the CS domain (the user can establish a service connection such as a call through the CS after the CS is attached). The IMS network is generally aware of the user's perception of the CS attach status by:

The user equipment network element replaces the user equipment (User equipment, the following unit is called UE) to register with the IMS. After the UE completes the attachment of the CS domain, the user agent network element uses its own Internet Protocol (IP) address and the UE's International Mobile Subscriber Identifier (IMSI) derived from the UE. The Temporary-IP Multimedia Public Identity (T-IMPU) is registered with the IMS domain, and the IMS network finally assigns the registration trigger of the CS domain to an implicit registration set.

An implicit registration set is an IP Multimedia Public Identity (IMPU) set. When a UE initiates registration using one of the IMPUs, the IMS network actively registers the associated IMPU to the same UE. That is, it has the same IP Multimedia Private Identity (hereinafter referred to as IMPI).

In this manner, as long as the UE successfully attaches in the CS domain, the UE is attached to the IMS record. The status is "registered" and the status of the separation is reversed. Service call session control function entity

(Serving-Call Session Control Function, the following cartridge is called S-CSCF) can directly trigger the service request to the application server (Application Server, the following container is called AS) by selecting the "registered" and "unregistered" trigger rules with the correct attachment status. The processing is performed on the AS. The AS is a functional entity in the IMS domain. Therefore, when the AS senses that the UE is in the CS attachment state, the IMS domain realizes the perception of the CS attachment state.

When the user's UE has both CS access capability and IP access capability, such as Packet Switched (PS) access capability, it is required to access through the CS domain and access the IP through the IMS. Registration, all triggered to the same implicit registration set, so that as long as one access path is available, the call to the user can be connected to the UE; and the opposite caller calling the user does not need to understand the access difference. . In addition to the normal call continuation, other businesses have similar needs.

However, one feature of the implicit registration set is that when one of the IMPUs is registered, the IMS network will automatically register other related IMPUs in the registration set. Therefore, when the UE initiates deregistration in one of the access domains, such as an IP access domain (such as a PS access domain), other access domains, such as the CS domain, are also registered at the same time, even if the user is still in CS at this time. The domain is attached, but the IMS has become unregistered and cannot trigger the service correctly.

In addition, the prior art does not disclose how the user agent network element obtains the attached state of the user in the CS domain.

Summary of the invention

The embodiment of the invention provides a method, device and system for sensing the attachment state of a circuit domain, so that the AS can sense the attachment state of the UE in the CS domain.

The embodiment of the invention further provides a multi-registration method and device for the IMS domain, which avoids triggering the logout of the corresponding implicit registration set when an access domain initiates de-registration in the case of multiple registration.

The method for sensing the attachment state of a circuit domain provided by the embodiment of the present invention includes the following steps: The proxy network element acquires the attachment status information of the user terminal UE in the CS domain of the circuit; and the user agent network element notifies the application server AS of the attachment status information of the UE in the CS domain.

The user agent network element provided by the embodiment of the present invention includes: an obtaining unit, configured to acquire information about the attachment state of the UE in the CS domain, and a notification unit, configured to notify the AS of the attachment state of the UE in the CS domain.

The user terminal provided by the embodiment of the present invention includes: a notification unit, configured to notify the user agent network element of the attachment status information of the CS domain of the user terminal UE.

The application server provided by the embodiment of the present invention includes: a receiving unit, configured to receive the user agent network element or the attachment status information of the UE sent by the server in the CS domain.

The system for sensing the attachment state of the circuit domain provided by the embodiment of the present invention includes: a user agent network element, configured to acquire information about the attachment state of the UE in the CS domain; and AS, configured to receive the UE attached to the CS domain by the user agent network element status information.

The IMS domain multiple registration method provided by the embodiment of the present invention includes the following steps: The user agent network element obtains the attachment status information of the UE in the CS domain, and initiates the registration with the first re-registration identifier to the IMS domain according to the attachment status information. Requesting or deregistering the request; and after the UE is attached to the IP access domain, initiating a registration request or a deregistration request carrying the second re-registration identifier to the IMS domain; the S-CSCF receives the user agent network element or the UE initiated After registering the request or going to the registration request, the corresponding judgment and processing are performed according to the re-registration identifier carried therein.

The S-CSCF provided by the embodiment of the present invention includes: a receiving unit, configured to receive a de-registration request for the UE initiated by the CS domain or the IP access domain, and a determining unit, configured to determine that there is only one re-registration identifier currently, and When the IMPU and the IMPI carried in the deregistration request received by the receiving unit correspond to each other, a cancellation signal is sent; and the cancellation unit is configured to, when receiving the cancellation signal sent by the determining unit, cancel the deregistration request received by the receiving unit. Implicit registration set.

In the embodiment of the present invention, the user agent network element obtains the attachment status information of the user terminal UE in the CS domain of the circuit; the user agent network element notifies the application server AS of the attachment status information of the UE in the CS domain. Therefore, the AS can sense the attachment status of the UE in the CS domain.

In the embodiment of the present invention, the user agent network element obtains the attachment state information of the UE in the CS domain, and roots And sending, by the attachment status information, a registration request or a deregistration request carrying the first re-registration identifier to the IMS domain; and after the UE is attached to the IP access domain, initiating a registration request carrying the second re-registration identifier to the IMS domain or De-registration request; after receiving the registration request or de-registration request initiated by the user agent network element or the UE, the S-CSCF performs corresponding judgment and processing according to the re-registration identifier carried therein. Since the re-registration identifier carried in the registration or de-registration request initiated by the CS domain and the IP access domain is different, the CS domain and the IP access domain may perform corresponding judgment processing. When an access domain initiates deregistration under multiple registration conditions, it avoids triggering the logout of the corresponding implicit registration set. DRAWINGS

1 is a flow chart of steps of a method according to an embodiment of the present invention;

2 is a schematic structural diagram of a user agent network element according to an embodiment of the present invention;

3 is a schematic structural diagram of a user terminal according to an embodiment of the present invention;

4 is a signaling flowchart of Embodiment 1 of a method according to the present invention;

5 is a signaling flowchart of Embodiment 2 of a method according to the present invention;

6 is a signaling flowchart of Embodiment 3 of a method according to the present invention;

7 is a signaling flowchart of Embodiment 4 of a method according to the present invention;

8 is a signaling flowchart of Embodiment 5 of a method according to the present invention;

FIG. 9 is a schematic structural diagram of an S-CSCF according to an embodiment of the present invention;

Figure 10 is a logic diagram of the determination of Embodiment 6 of the method of the present invention. detailed description

In order to enable the AS to be aware of the attachment state of the UE in the CS domain, and to utilize the correct triggering service, the embodiment of the present invention provides a method for sensing the attachment state of the circuit domain. Referring to FIG. 1, the following main steps are included. :

The user agent network element obtains the attachment status information of the UE in the CS domain.

The user agent network element may obtain the CS domain attachment status information of the UE by using one of the following four manners: Interest rate:

Manner 11, the UE notifies the user agent network element of the attachment status information of the CS domain.

Method 12: The user agent network element serves as a service control point SCP, and is accessed by a user location register (Customer Applications for Mobile Network Enhanced Logic, Camel). The following cylinder is called VLR. The UE is attached to the CS domain in an intelligent trigger reporting manner.

Method 13, the user agent network element to the Home Subscriber Server/Home Location Register (hereinafter referred to as HSS/HLR) queries to obtain the attachment status information of the UE in the CS domain.

Method 14. The HSS/HLR pushes the attachment status information of the UE terminal in the CS domain to the user agent network element.

In the mode 11, after the UE successfully attaches in the CS domain, the UE is notified that the proxy network element has been attached in the CS domain. When the UE is ready to be separated, the UE notifies the user that the proxy network element has been separated in the CS domain (for example: When the system is powered off, the UE notifies the user that the proxy network element has been separated in the CS domain before performing the separation operation with the circuit domain.

In the mode 11, the UE may notify the user of the proxy network element by using one of the following methods: The mode 111, notifying the user agent network element by using an Unstructured Supplementary Services Data (hereinafter referred to as USSD) message: When the USSD message is used, since the content of the USSD message is carried in the USSD-String without distinction, the indication of the USSD message body is also specified in advance between the UE and the user agent network element. The indication includes: an attachment status notification command; a corresponding IMPU; an attachment status, such as Attached/Detached.

The mode 112 notifies the user agent network element by using a Session Initiation Protocol (SES) message: When directly using the SIP protocol and the communication between the remote user agents, the Message message may be used to notify the user agent network element. Content-Type in the Message message It can be a Text type. Similarly, in this general Text message, you need to specify: Attachment Status Notification Command; Corresponding IMPU; Attached Status ( Attached/Detached).

The mode 113 notifies the user agent network element by using a short message (SMS): when the short message is used, the user agent network element acts as a short message node, and the UE can send the attached state by sending a short message. Notify the remote user agent. Similarly, in the short message content, you need to specify: Attachment status notification command; Corresponding IMPU; Attached/Detached.

S2. The user agent network element notifies the application server AS of the attachment status information of the UE in the CS domain. The user agent network element notifies the UE of the attachment status information of the CS domain in one of the following ways:

AS:

The mode 21, the AS establishes a subscription relationship with the user agent network element (that is, subscribes to the CS domain attachment state change event notification of the relevant UE), and according to the subscription relationship, when the user agent network element senses that the attached state of the UE subscribed to the CS domain changes When the AS is notified.

The mode is as follows: When the AS needs to obtain the current state information of the UE in the CS domain, the AS sends a subscription query message to the user agent network element, and the user agent network element returns the attachment status information of the UE in the CS domain to the AS.

Method 23: The user agent network element notifies the AS by means of active publishing, that is:

The user agent network element senses that when the UE's attachment status changes in the CS domain, the status change event is released to the AS through SIP PUBLISH.

The method 24 establishes a subscription relationship between the AS and the presence server (Presence-Server), and the Presence-Server establishes a subscription relationship with the user agent network element (ie, subscribes to the CS domain attachment state change event notification of the relevant UE); when the user agent network element senses the UE When the attachment status of the CS domain changes, the Presence-Server is notified to the Presence-Server according to the subscription relationship established between the Presence-Server and the user agent NE, and then the Presence-Server notifies the AS according to the subscription relationship established between the AS and the Presence-Server. .

Manner 25, when the user agent network element senses that the attachment state of the UE in the CS domain changes, Notify Presence-Server by means of proactive release;

When the AS needs to obtain the current state information of the UE in the CS domain, it sends a subscription query message to the Presence-Server, and then the Presence-Server notifies the AS according to the subscription relationship. The manner in which the user agent network element notifies the presence-server includes: the user agent network element sends a notification to the presence server through the internal interface as a presence network agent (Presence Network Agent, PIA); the user agent network element acts as a presentation user agent ( The Presence User Agent (hereinafter referred to as PUA) sends a notification to the Presence Server through the Ut interface; the User Agent NE acts as an external unit to send a notification through the SIP PUBLISH message.

After the AS obtains the attachment status information of the UE in the CS domain, the application may be performed according to the following. The application includes but is not limited to: performing corresponding service control in the IMS domain according to the service subscription data, according to the acquired circuit domain and the IMS domain. Status information, contract information, etc. for domain selection.

The embodiment of the present invention further provides a user agent network element. As shown in FIG. 2, the method includes: an acquiring unit and a notification unit.

The obtaining unit is configured to obtain information about the attachment status of the UE in the CS domain. The obtaining unit receives the attachment status information of the UE in the CS domain notified by the UE; or the acquiring unit receives the attachment status information of the UE in the CS domain sent by the VLR through the smart trigger; or the acquiring unit to the HSS/HLR The query obtains the attachment status information of the UE in the CS domain; or the acquiring unit receives the attachment status information of the UE in the CS domain pushed by the HSS/HLR.

The notification unit is configured to notify the AS of the attachment status information of the UE in the CS domain.

Further, it further includes one or any combination of the following units: a subscription processing unit connected to the notification unit, an inquiry processing unit connected to the notification unit, and an information distribution unit connected to the notification unit.

a subscription processing unit, configured to receive a subscription request message sent by the AS or the Presence-Server, and establish a subscription relationship with the AS or the Presence-Server, and when the acquiring unit senses that the attachment state of the UE in the CS domain changes, according to the The subscription relationship indication notification unit notifies the AS or Presence-Server of the attachment status information of the relevant UE currently in the CS domain according to the subscription relationship.

a query processing unit, configured to indicate a notification unit when receiving a subscription query message sent by the AS The AS is returned to the AS for the attachment status information of the current UE in the CS domain.

The information issuing unit is configured to: when the acquiring unit detects that the attachment state of the UE in the CS domain changes, instructing the notification unit to actively advertise the attachment state information of the UE in the CS domain to the Presence-Server or the AS.

The embodiment of the present invention further provides a user terminal, as shown in FIG. 3, which includes: a notification unit; and further includes a trigger unit connected to the notification unit.

The notification unit is configured to notify the user agent network element of the attachment status information of the CS domain of the user terminal UE.

a triggering unit, configured to: when the UE is successfully attached in the CS domain, trigger the notification unit to notify the user of the proxy network element, the UE has been attached in the CS domain; when the UE is ready to be separated, the trigger notification unit notifies the user of the proxy network element, the UE The CS domain has been separated.

An embodiment of the present invention further provides an application server, including: a receiving unit; further comprising one or any combination of the following units: initiating a subscription unit, initiating a query unit.

The receiving unit is configured to receive the attachment state information of the UE sent by the user agent network element in the CS domain. The initiating subscription unit is configured to send a subscription request message to the network element that stores the attachment status information of the UE in the CS domain, to establish a subscription relationship with the network element.

And initiating a query unit, configured to send a query request message to the network element that stores the attachment status information of the UE in the CS domain.

The embodiment of the present invention further provides a system for sensing a state of attachment of a circuit domain, including: a user agent network element for acquiring attachment state information of a UE in a CS domain, and a UE for receiving user agent network element notification in a CS domain The AS of the attached status information. The method further includes: the UE notifying the attachment status information of the CS domain to the user agent network element; or the VLR notifying the user agent network element of the attachment status information of the UE in the CS domain by intelligent triggering. The system may further include: an HSS/HLR, configured to provide the attachment state information of the related UE in the CS domain when the user agent network element queries the UE for attachment status information in the CS domain.

Further, the system may further include: a presence server (Presence-Server) for use with the AS, One or both of the user agent network elements establish a subscription relationship and will be related according to the subscription relationship

The attachment status information of the UE in the CS domain is provided to the AS.

The following is specifically described by five embodiments.

Embodiment 1: The user agent network element changes through the UE, and the attachment state of the sensing circuit domain changes. Referring to FIG. 4, the following steps are included:

1. The UE completes the registration (attached) in the CS domain.

2. The UE sends a notification message to the user agent network element, and notifies the user agent network element that the UE is attached in the CS domain. The content in the message carries: an attach notification command; a corresponding IMPU; an attached state

( Attached ).

After receiving the notification, the user agent network element finds that the message content carries the CS domain attachment status notification command, extracts other fields in the command, and learns the attachment status of the UE in the CS domain; and performs subsequent related logical operations; The proxy network element returns an acknowledgement message to the UE.

Go to the registration process:

1. When the user triggers the shutdown, the UE sends a notification message to the user agent network element, and notifies the user agent network element that the UE is separated in the CS domain. The content in the message carries: an attach notification command; a corresponding IMPU; an attached state (Detached).

2. After receiving the notification, the user agent network element finds that the message content carries the CS domain attachment status notification command, extracts other fields in the command, and learns that the UE is in the CS domain state is separated; and performs subsequent related logical operations; The user agent network element returns a notification confirmation message to the UE.

3. The UE completes the Detach shutdown operation according to the process of the CS domain.

Note: The notification message from the UE to the user agent network element can be transmitted by USSD, SIP, SMS, etc.

When passing through USSD, the user agent network element can be transmitted as an SCP or an external entity by the UE through a Mobile Services Switching Centre (hereinafter referred to as MSC)/VLR-HLR-User Agent network element. The destination of the USSD request message initiated by the UE is the SCP address of the user agent network element, etc.; if the user agent network element is a USSD The entity, the message must also be passed through the USSD gateway.

When passing through a SIP message, the user agent network element can act as an AS and assign a fixed public service identifier (PSI). The SIP message message is sent by the UE to the PSI.

When passing through the SMS path, the user agent network element can be used as a Short Message Entity (hereinafter referred to as SME) with an E.164 number, and the UE sends a short message to the number.

In the second embodiment, the user agent network element detects the change of the CS domain attachment state of the related user through the mobility management (Mobility Management, MM) event triggered by the MSC/VLR, as shown in FIG. 5, and includes the following steps. :

1. Set the MM event trigger point in the MSC/VLR. The trigger event includes the user's registration (attach) and deregistration (Detach) operations.

2-3. After the MM event occurs, the MSC/VLR informs the user of the MSISDN and the operation event (Attach/Detach) by using the MM event on the Mobile Application Part (hereinafter referred to as MAP) message to the user agent network element. User agent network element.

4. After receiving the MM notification message, the user agent network element returns a response message and performs related subsequent operations.

Note:

In addition to the above manner, the user agent network element can also obtain the user's attachment status in the CS domain by querying or subscribing to the HSS/HLR.

In the third embodiment, the user agent network element notifies the user of the CS domain attachment status of the user through the Presence Server (the Telephony Application Server, TAS), as shown in FIG. 6, and includes the following steps:

1. The Presence Server requests the user agent network element by subscribing (Subscribe) to establish a subscription relationship.

2. The TAS requests the user status through the Subscribe request message to the Presence Server subscription. The content is the CS domain attachment status.

3. Presence Server returns 200 OK to TAS.

4. When the user agent network element obtains the change of the CS domain attachment status of the user, the Presence Server is notified of the change.

5. The Presence Server notifies the TAS that the user status subscribed has changed through a notification (Nofity) message.

6. The TAS returns 200 OK to the Presence Server.

Note:

For how the user agent network element obtains the user's attachment status change in the CS domain, refer to the previous embodiment. In addition to Notify, the notification message of the user agent network element to the Presence Server can also pass

Publish; and the internal interface and other means of notification, in addition, the user agent network element can also be used as a PUA to send a port to the Presence Server using the Ut interface.

The way in which the TAS to the Presence Server obtains the status information also includes initiating a one-time Subscribe request when needed, and the Expires header in the Subscribe message is filled in with 0.

Embodiment 4: The user agent network element provides a CS attach status subscription service, and notifies the user of the attachment status to the TAS by subscribing to the notification, as shown in FIG. 7, including the following steps:

1. The TAS subscribes to the user's CS domain attachment status by sending a Subscribe request message to the user agent network element.

2. The user agent NE returns 200 OK to TAS.

3. When the user agent network element senses that the user's CS domain attachment status changes, the TAS is notified of the change.

4. The TAS saves the user's CS domain attachment status and returns a response.

5. After receiving an invitation (Invite) request, the TAS performs service processing according to the attached state information of the saved user CS domain when performing service processing.

Note:

It can also be implemented through the following process: First, after the TAS receives an Invite request, it conducts the business. The processing needs to obtain the attachment status information of the user in the CS domain. Secondly, the TAS subscribes to the user status notification through the Subscribe request message to the user agent network element, and the Expires header field carried is 0. Finally, the user agent network element sends a Notify notification to the TAS according to the request and the previously obtained CS domain attachment status information, and according to the Expires header is 0, and then no longer actively notify.

For how the user agent network element obtains the user's attachment status change in the CS domain, refer to the previous embodiment. In addition to Notify, the notification message of the user agent network element to the TAS can also be notified by means of Publish.

Embodiment 5: An example in which the TAS subscribes to the user agent network element in the CS domain and applies the specific application, as shown in FIG. 8, includes the following steps:

The I- 8, TAS, and voicemail servers respectively subscribe to the CS domain attachment status of user A to the user agent network element.

9. The user terminal (UE) corresponding to user A is powered on, and the UE is attached to the CS domain; however, due to the network environment, it cannot be registered in the IMS domain.

10. The UE notifies the user that the proxy network element has been attached to the CS domain.

II- 18. The user agent network element notifies the TAS and the voice mailbox server user A of the CS domain registration status change (registered) according to the subscription status.

19. At this point, a new call called User A arrives at the S-CSCF.

20. The S-CSCF triggers the service to the voice mailbox according to the unregistered trigger rule.

21. The voice mailbox judges that the recording operation is not required according to the attachment status of the user in the CS domain, and no service trigger is performed.

22. The voice mailbox continues to send Invite messages back to the S-CSCF.

23. The S-CSCF continues to trigger to the TAS using unregistered business rules.

24. The TAS should judge whether the user should provide registration services according to the attachment status of the user in the CS domain, and should not be an unregistered service. For example, the user should not be provided with the unregistered forwarding (Communication Forwording No Logged-in). Called CFNL) business.

25-29, TAS sends the call back to S-CSCF, S-CSCF passes and CS domain Inter- Working The way to continue to call the user, complete the subsequent session connection.

Note: In this example, the application information of the user in the CS domain attachment state is described for the AS, but only the application of the TAS and the voice mailbox is listed, but obviously other ASs such as the access domain selection (Access Domain Selection, the following tube) ADS) AS and so on can also know the user's attachment status in the CS domain in this way, and then select the access domain based on this information.

In order to enable the de-registration of an access domain in the case of multiple registrations, the de-registration of the corresponding implicit registration set is not triggered. The embodiment of the present invention provides a multi-registration method for the IMS domain, including the following content: The UE perceives the attachment status information of the UE in the CS domain (same as above), determines that the UE is attached to the CS domain, and uses the IMSI-derived temporary IMPU (T-IMPU), temporary ΙΜΡΙ (Τ-ΙΜΡΙ), and carries the re-registration identifier ( Identification 1) Register with IMS. When the UE initiates registration in the PS domain, it also carries the IMSI-derived T-IMPU, T-IMPI, and re-registration identifier (identification 2) to the IMS for registration.

Since the different re-registration identifiers are carried, the S-CSCF distinguishes the two registrations and saves two pieces of information with the same IMPU/IMPI and different re-registration/Contact addresses; instead of using the latter registration The Contact address overrides the previously registered Contact address. At the same time, after completing the registration of any of the above, the S-CSCF will download the implicit registration set to the HSS and automatically register the associated IMPU. All subsequent session requests can be made using the associated IMPU. In this way, whether the user is registered to the IMS through the CS domain, or registered to the IMS through the PS domain, or both are registered to the IMS at the same time, the session operation can be initiated through the same IMPU, and the S-CSCF can be based on the "registered" service. Triggering rules are triggered to provide services to users on the AS.

The existing S-CSCF does not define the de-registration behavior of the implicit registration set in the case of multiple registrations. According to the current definition, the S-CSCF will immediately register when any one of the IMPUs in the implicit registration set is registered. All relevant associated IMPUs are centralized to register; therefore, even if the above multiple registration is completed, whether the CS domain or the PS domain initiates registration will cause all IMPUs to register, and the user will be "unregistered" in the IMS. " status.

So you need to redefine the behavior of the S-CSCF: when the S-CSCF receives a registration from a domain, please When seeking, for the case of multiple registrations, first look for registration information of different re-registration identifiers with the same IMPU/IMPI. If there are other registrations, the logout of the corresponding implicit registration set is not triggered, only the IMPU/ After all the registrations corresponding to IMPI are logged out, the logout of the corresponding implicit registration set is actually triggered.

An embodiment of the present invention further provides an S-CSCF, as shown in FIG. 9, which includes: a receiving unit, a judging unit, and a deregistering unit that are sequentially connected.

The receiving unit is configured to receive a deregistration request for the UE initiated by the CS domain or the IP access domain. The determining unit is configured to: when it is determined that the IMPU/IMPI carried in the deregistration request currently only has one re-registration identifier, and corresponding to the identifier carried in the de-registration request, issue a cancellation signal.

The logout unit is configured to, when receiving the logout signal sent by the judging unit, cancel the implicit registration set pointed to by the deregistration request received by the receiving unit.

The following is specifically described by way of an embodiment.

Embodiment 6: The S-CSCF performs a multi-registration deregistration request determination logic embodiment, as shown in FIG. 10, and includes the following steps:

1. The S-CSCF receives a registration request initiated by the UE or the user agent.

2. The S-CSCF determines whether there is registration information corresponding to the IMPU, IMPI, and re-registration identifier in the request.

3. When the condition is judged in the step 2 (having the same IMPU/IMPI and the registration information corresponding to the re-registration identifier), the registration information corresponding to the IMPU, IMPI, and the re-registration identifier is deleted.

4. The S-CSCF determines whether there is still the remaining registration information that has the same IMPU/IMPI as the registration request, but the re-registration identifier is not the same.

5. If the condition of step 4 is not established (there is no remaining registration information), the IMPU/IMPI corresponding to the registration information is deleted, and the relevant IMPU corresponding to the implicit registration set is deleted; if the condition is not established, the process ends.

6. When step 2 determines that the condition is not true (does not have the same IMPU/IMPI and re-registration identifier The corresponding registration information), the exception processing is performed, and then the flow is ended.

In summary, the method, device, and system for sensing the attachment state of a circuit domain provided by the embodiment of the present invention enable the AS to sense the attachment state of the UE in the CS domain, thereby performing the service correctly, thereby enabling some cross-domain services. Can be controlled correctly.

The method and device for registering multiple IMS domains provided by the embodiment of the present invention avoids the problem of triggering the logout of the corresponding implicit registration set when an access domain initiates deregistration in the case of multiple registrations;

The S-CSCF can accurately know the status of the UE and trigger the service correctly.

IMS is 3GPP (3 ^rd Generation Partnership Project) and TISPAN (

Telecommunications and Internet Converged Services and Protocols for

Advanced Networking) described in the ^{3GPP2 (3 rd Generation Partnership Project 2} ) also present in a similar multimedia subsystem called Multimedia Domain (Multimedia Domain, hereinafter referred cylindrical MMD); in order to describe the present invention, the cartridge will only for IMS The description is made, but it is obvious that the described method is equally applicable to the MMD system. The spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and the modifications of the invention

Claims

Rights request

A method for sensing a state of attachment of a circuit domain, comprising: the following steps: a user agent network element acquires attachment state information of a user terminal in a circuit switched domain; and the user agent network element places the user terminal in a circuit The attachment status information of the switching domain is notified to the application server.

2. The method according to claim 1, wherein the user agent network element obtains the attachment status information of the user terminal in the circuit switched domain by one of the following methods:

In the mode 11, the user terminal notifies the user agent network element of the attachment status information in the circuit switched domain; and the mode 12, the mobile service switching center/access user location register intelligently triggers, and notifies the user terminal of the attachment status information in the circuit switched domain. Give the user a proxy network element;

Method 13, the user agent network element to the home user server / home location register query obtains the attachment state information of the user terminal in the circuit switched domain;

Method 14. The home subscriber network/home location register pushes the attachment status information of the user terminal in the circuit switched domain to the user agent network element.

The method according to claim 2, wherein, in the manner 11, after the user terminal is successfully attached in the circuit switched domain, the user agent network element is notified that it is attached in the circuit switched domain;

When the user terminal is ready to detach, the user agent network element is notified that it has been separated in the circuit switched domain.

The method according to claim 2, wherein in the mode 11, the user terminal UE notifies the user agent network element by one of the following methods:

The mode 111 is to notify the user agent network element by using an unstructured supplementary data service message.

The mode 112 is to notify the user agent network element by using a session initiation protocol message;

Method 113: Notifying the user agent network element with a short message.

The method according to claim 1, wherein the user agent network element notifies the application terminal of the attachment status information of the user terminal in the circuit switched domain by using one of the following manners: Device:

The method 21: the application server establishes a subscription relationship with the user agent network element, and when the user agent network element senses that the attachment state of the user terminal in the circuit switched domain changes, notifying the application server according to the subscription relationship;

The method 22 is to: when the application server needs to obtain the current state information of the user terminal in the circuit switched domain, send a subscription query message to the user agent network element, and the user agent network element returns the current state of the user terminal in the circuit switched domain to the application server. Information

The mode 23 is notified by the user agent network element to the application server by means of the active distribution; the method 24, the application server establishes a subscription relationship with the presence server, and the presence server establishes a subscription relationship with the user agent network element;

And when the user agent network element senses that the attachment state of the user terminal in the circuit switched domain changes, according to the subscription relationship established by the presence server and the user agent network element, notifying the presence server, and then the subscription server establishes a subscription according to the application server and the presence server. Relationship, notify the application server;

Method 25: When the user agent network element senses that the attachment state of the user terminal in the circuit switched domain changes, the presence server is notified by means of active publishing;

When the application server needs to obtain the attachment status information of the user terminal in the circuit switched domain, the application server sends a subscription query message to the presence server, and the presence server returns the attachment status information of the user terminal in the circuit switched domain to the application server.

6. A user agent network element, comprising:

An acquiring unit, configured to acquire information about an attachment state of a user terminal in a circuit switched domain;

The notification unit is configured to notify the application server of the attachment status information of the user terminal acquired by the acquisition unit in the circuit switched domain.

The user agent network element according to claim 6, wherein the obtaining unit receives the attachment state information of the user terminal notified by the user terminal in a circuit switched domain; or

The obtaining unit receives the smart through the mobile service switching center/access user location register Triggering the attached state information of the user terminal in the circuit switched domain; or

The obtaining unit queries the home subscriber server/home location register to obtain the attachment state information of the user terminal in the circuit switched domain; or

The obtaining unit receives the attachment state information of the user terminal actively pushed by the home subscriber server/home location register in the circuit switched domain.

8. The user agent network element according to claim 6, further comprising: a subscription processing unit, configured to receive a subscription request message sent by the application server or the presence server, and establish a subscription relationship with the application server or the presence server. And when the acquiring unit senses that the attachment state of the user terminal in the circuit switched domain changes, according to the subscription relationship indication, the notification unit notifies the application server or the presence server of the attachment state information of the related user terminal currently in the circuit switched domain.

The user agent network element according to claim 6, further comprising: a query processing unit, configured to: when receiving the subscription query message sent by the application server, instruct the notification unit to return the corresponding user terminal to the application server Attachment status information currently in the circuit switched domain.

The user agent network element according to claim 6, further comprising: an information issuing unit, configured to: when the acquiring unit senses that the attachment state of the user terminal in the circuit switched domain changes, instructing the notification unit to the user The attachment status information of the terminal currently in the circuit switched domain is actively announced.

11. A user terminal, comprising:

The notification unit is configured to notify the user agent network element of the attachment status information of the circuit switched domain of the user terminal.

The user terminal according to claim 11, further comprising:

a triggering unit, configured to: after the user terminal is successfully attached in the circuit switched domain, trigger a notification unit to notify the user agent network element, where the user terminal is attached in a circuit switched domain;

When the user terminal is ready to be separated, the trigger notification unit notifies the user agent network element that the user terminal has been separated in the circuit switched domain.

An application server, comprising: a receiving unit, configured to receive a user agent network element or an attachment state information of a user terminal sent by a server in a circuit switched domain.

The application server according to claim 13, further comprising: an initiating subscription unit, configured to send a subscription request message to the network element that stores the attachment status information of the user terminal in the circuit switched domain, and the network Yuan establishes a subscription relationship.

The application server according to claim 13, further comprising: an initiating query unit, configured to send a subscription query message to the network element storing the attachment status information of the user terminal in the circuit switched domain.

16. A system for sensing a state of attachment of a circuit domain, comprising:

The user agent network element is configured to obtain the attachment state information of the user terminal in the circuit switched domain, and the application server is configured to receive the attached state information of the user terminal notified by the user agent network element in the circuit switched domain.

17. The system according to claim 16, wherein the user terminal notifies the user agent network element of the connection status information of the circuit switched domain; or the smart service triggers by the mobile service switching center/access user location register. The attachment status information of the user terminal in the circuit switched domain is notified to the user agent network element.

The system according to claim 16, wherein the system further comprises: a home subscriber server/home location register, configured to provide, when the user agent network element queries the user terminal for attachment state information in the circuit switched domain The attachment status information of the related user terminal in the circuit switched domain; or actively notifying the user agent network element when the circuit switched domain attachment information of the user terminal changes.

The system according to claim 16, wherein the system further comprises: a presence server, configured to establish a subscription relationship with one of the application server, the user agent network element, or both, and according to the subscription The relationship provides the attachment status information of the relevant user terminal in the circuit switched domain to the application server.

20. A multi-registration method for an IMS domain, characterized in that the method comprises the following steps:

The user agent network element acquires the attachment status information of the user terminal in the circuit switched domain, and initiates a registration request or a deregistration request carrying the first re-registration identifier to the IMS domain according to the attachment status information; and the user terminal is connected at the IP address. After the inbound domain is attached, the user terminal initiates carrying to the IMS domain. a registration request or a deregistration request with a second re-registration identifier;

After receiving the registration request or the registration request initiated by the user agent network element or the user terminal, the service call session control function entity performs corresponding judgment and processing according to the re-registration identifier carried therein.

The method of claim 20, wherein the registration request or deregistration request initiated by the user agent network element to the IMS domain comprises: a specific IP multimedia public identity corresponding to the user terminal, and a specific IP multimedia a private identifier and a first re-registration identifier; the registration request or the de-registration request initiated by the user terminal to the IMS domain includes: an IP multimedia carried in a registration request or a deregistration request initiated by the user agent network element to the IMS domain The IP multimedia public identity and the IP multimedia private identity are the same as the public identity and the IP multimedia private identity, and the second re-registration identity.

The method according to claim 20, wherein the determining process after the service call session control function receives the registration request comprises: when the IP multimedia public identity, the IP multimedia private identity, and the re-registration identifier in the registration request are in the service When the call session control function does not exist, the corresponding registration record is saved and the home subscriber server is notified.

The method according to claim 20, wherein the determining process after the service call session control function entity receives the deregistration request comprises: whether the IP multimedia public identity and the IP multimedia private identity carried in the deregistration request still exist Other registration records, if not, log out the IP multimedia public identity, the IP multimedia private identity, and the corresponding implicit registration set; if there is, delete the saved in the service call session control function entity and carry the request in the deregistration request The IP multimedia public identity, the IP multimedia private identity, and the registration record corresponding to the re-registration identifier.

24. A service call session control function entity, comprising:

a receiving unit, configured to receive a deregistration request for the user terminal;

a determining unit, configured to issue a cancellation signal when determining that there is only one re-registration identifier currently corresponding to the IP multimedia public identifier and the IP multimedia private identifier carried in the de-registration request received by the receiving unit;