Method and system for a traditional terminal user to access an IMS domain

• US 20070008957A1
• Filed: 07/05/2006
• Published: 01/11/2007
• Est. Priority Date: 07/05/2005
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Huang, Shibi
• Granted Patent: US 7,643,474 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 65/1016 IP multimedia subsystem [IMS]
• CPC Class Codes: H04L 65/103 in the network
• CPC Class Codes: H04L 65/104 in the network
• CPC Class Codes: H04L 65/1073 Registration or de-registration
• CPC Class Codes: H04L 65/1095 Inter-network session transfer or sharing
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]

Abstract

Provided are an implementing method and a communication system for a traditional terminal user accessing an IMS domain. The method allocates an IMS domain user identification including a public identification and a private identification to a traditional terminal user on an AGF entity controlled by an AGCF entity, and establishes a mapping relation between the IMS domain user identification and the line identification of the user. When receiving a command or message for a certain user terminal sent from the AGF entity, the AGCF entity determines the IMS domain user identification of the user according to the mapping relation and sends a corresponding SIP message to the IMS domain.

Claims

1. A method for a traditional terminal user to access an IMS domain, comprising the steps of:

allocating an IMS domain user identification comprising a public identification and a private identification to a traditional terminal user on an AGF entity controlled by an AGCF entity, and establishing a mapping relation between the IMS domain user identification and the line identification of the user, the line identification being used for determining the AGF entity and port corresponding to the user; and

when receiving a command or message for a certain user terminal sent from the AGF entity, the AGCF entity determining the IMS domain user identification of the user according to the mapping relation and sending a corresponding SIP message to the IMS domain;

or when receiving a SIP message sent from the IMS domain, the AGCF entity determining the line identification of the user according to the mapping relation and sending a corresponding command or message to the AGF entity based on the control protocol of the AGF entity, and the command or message being converted into an analog line signaling by the AGF entity and being transmitted to the user terminal.

2. The method according to claim 1, wherein,

the AGCF entity and the AGF entity are arranged in a reliable security network domain to guarantee communication security therebetween.

3. The method according to claim 2, wherein,

a security path is arranged between the AGCF entity and the AGF entity to further guarantee the communication security.

4. The method according to claim 1, wherein,

the AGCF entity allocates the same private identification to all or part of traditional terminal users under its control.

5. The method according to claim 4, wherein,

the AGCF entity allocates one or more public identifications to each accessing user.

6. The method according to claim 1, wherein,

the AGCF entity allocates one or more public identifications to each accessing user.

7. A method for a traditional terminal user to register to an IMS domain, comprising the steps of:

allocating an IMS domain user identification comprising a public identification and a private identification to a traditional terminal user on an AGF entity controlled by an AGCF entity, and establishing a mapping relation between the IMS domain user identification and the line identification of the user, the line identification being used for determining the AGF entity and port corresponding to the user; and

when the AGF entity issues that the status of the port corresponding to the user is normal, the AGCF entity determining the IMS domain user identification of the user according to the mapping relation, constructing a corresponding SIP registration message and sending it to the IMS domain.

8. The method according to claim 7, wherein,

after the user successfully registers, the registration information relative to the user is recorded on the AGCF entity.

9. The method according to claim 8, wherein,

the AGCF entity further initiates the subscription procedure of the user registration status and initiates the user re-registration procedure before the consulted period of validity of the registration is overridden.

10. The method according to claim 8, wherein,

when the AGF entity issues that the status of the port corresponding to the user is abnormal in the subsequent procedure, the AGCF entity replies a response to the AGF entity, constructs a SIP deregistration message, sends it to the IMS domain, and deletes the registration information relative to the user.

11. The method according to claim 8, wherein,

when receiving a message indicative of that the IMS domain requests to deregister the registered user in the subsequent procedure, the AGCF entity deletes the registration information relative to the user.

12. The method according to claim 8, wherein,

the AGCF entity stores the terminal status issued by the AGF entity and the registration status of the user corresponding to the terminal in the IMS domain, and when receiving a message showing that the communication connection between the AGCF entity and the AGF entity is temporarily interrupted and then recovered, the AGCF entity performs synchronization for the status of the terminal.

13. The method according to claim 12, wherein,

during the procedure of performing synchronization for the terminal status, if detecting that the terminal status changes from the stored normal status to the detected abnormal status and the corresponding user has registered in the IMS network, the AGCF entity constructs an SIP deregistration message, sends it to the IMS domain and deletes the registration information relative to the user;

and

if detecting that the terminal status changes from the stored abnormal status to the detected normal status and the corresponding user has not registered in the IMS network yet, the AGCF entity indicates to initiate the registration procedure to the IMS network for the user.

14. The method according to claim 8, wherein,

when detecting that communication with the AGF entity is interrupted, the AGCF entity constructs SIP deregistration messages for all registered users on the AGF entity and sends them to the IMS domain so as to deregister the users in the IMS domain.

15. The method according to claim 7, wherein,

the AGF entity issues the statuses of a plurality of terminals in a message issuing the status of a terminal.

16. The method according to claim 15, wherein,

when the AGCF entity needs to register the users corresponding to the plurality of terminals to the IMS domain or deregister them from the IMS domain according to the issued statuses of the terminals, it only issues limited SIP registration messages or SIP deregistration messages within a time period.

17. The method according to claim 7, wherein,

the AGCF entity and the AGF entity are arranged in a reliable security network domain to guarantee communication security therebetween.

18. The method according to claim 17, wherein,

a security path is arranged between the AGCF entity and the AGF entity to further guarantee the communication security.

19. The method according to claim 7, wherein,

the AGCF entity allocates the same private identification to all or part of traditional terminal users under its control.

20. The method according to claim 7, wherein,

the AGCF entity allocates one or more public identifications to each accessing user.

21. A method for deregistering a registered traditional terminal user, comprising the steps of:

an AGF entity controlled by an AGCF entity issuing that the status of a port corresponding to the traditional terminal user registered in the IMS domain is abnormal in which the AGCF entity allocates an IMS domain user identification to the traditional terminal user and establishes a mapping relation between the IMS domain user identification and the line identification of the user, and the line identification is used for determining the AGF entity and port corresponding to the user; and

the AGCF entity determining the IMS domain user identification of the user according to the mapping relation, constructing a SIP deregistration message and deleting the registration information relative to the user.

22. The method according to claim 21, wherein,

after receiving an issued message from the AGF entity, the AGCF entity replies a response message to the AGF entity.

23. A method for deregistering a traditional terminal user, comprising the steps of:

the network device of an IMS domain sending a SIP Notify message for deregistering the traditional terminal user to an AGCF entity in which the AGCF entity allocates an IMS domain user identification to the traditional terminal user and establishes a mapping relation between the IMS domain user identification and the line identification of the user, and the line identification is used for determining the AGF entity and port corresponding to the user; and

after receiving the SIP Notify message, the AGCF entity deleting stored registration information of the user and replying a response message to the IMS domain.

24. A method for initiating the registration or deregistration of a traditional terminal user, comprising:

an AGCF entity storing terminal status issued by an AGF entity under its control and the registration status of the user corresponding to a terminal in an IMS domain in which the AGCF entity allocates an IMS domain user identification to the traditional terminal user and establishes a mapping relation between the IMS domain user identification and the line identification of the user, and the line identification is used for determining the AGF entity and port corresponding to the user; and

the AGCF entity performing synchronization for the terminal status when receiving a datagram issued by the AGF entity showing that a communication connection between the AGCF entity and the AGF entity is temporarily interrupted and then recovered, and during the synchronization if detecting that the terminal status of the user registered in the IMS network changes from the stored normal status to the detected abnormal status, the AGCF entity constructing an SIP deregistration message, sending it to the IMS domain and deleting the registration information relative to the user and if detecting that the terminal status of the user not registered in the IMS network changes from the stored abnormal status to the detected normal status, the AGCF entity indicating to initiate the registration procedure to the IMS network for the user.

25. A method for deregistering a traditional terminal user, comprising the steps of:

an AGCF entity storing a registration status in an IMS domain of the traditional terminal user on an AGF entity under its control in which the AGCF entity allocates an IMS domain user identification to the traditional terminal user; and

when detecting that communication with the AGF entity is interrupted, the AGCF entity constructing SIP deregistration messages for all registered users on the AGF entity, sending them to the IMS domain and deleting the registration information of the registered users.

26. A communication system comprising an IMS network, an AGF entity, a plurality of terminal devices in a circuit domain, and an ACGF entity,

wherein the IMS network comprises a CSCF entity and the terminal devices are connected to the AGF entity,

wherein the AGCF entity is connected between the CSCF entity and the AGF entity such that the terminals on the AGF entity are accessed to the IMS domain under the control of the AGCF entity,

and wherein the AGCF entity is capable of allocating an IMS domain user identification comprising a public identification and a private identification to the user corresponding to the terminal device under the AGF entity and storing mapping relations between the IMS domain user identification and the line identification of the user.

27. The communication system according to claim 26, wherein,

the communication system further comprises one or more AGF entities and the AGCF entity and the AGF entities are arranged in a reliable security network in which the AGF entities directly access the IMS network through the AGCF entity.