WO2009024006A1 - Contrôleur de session locale, sous-système multimédia ip et procédé d'enregistrement de session - Google Patents

Contrôleur de session locale, sous-système multimédia ip et procédé d'enregistrement de session Download PDF

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Publication number
WO2009024006A1
WO2009024006A1 PCT/CN2008/000561 CN2008000561W WO2009024006A1 WO 2009024006 A1 WO2009024006 A1 WO 2009024006A1 CN 2008000561 W CN2008000561 W CN 2008000561W WO 2009024006 A1 WO2009024006 A1 WO 2009024006A1
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WIPO (PCT)
Prior art keywords
session
message
user
access
request message
Prior art date
Application number
PCT/CN2008/000561
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English (en)
French (fr)
Inventor
Haiqiang Xue
Congxing Ouyang
Bing Wei
Xiaoyun Wang
Original Assignee
China Mobile Communications Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Mobile Communications Corporation filed Critical China Mobile Communications Corporation
Priority to US12/673,143 priority Critical patent/US8918518B2/en
Priority to KR1020107004775A priority patent/KR101110990B1/ko
Priority to CN2008801009608A priority patent/CN101971592B/zh
Priority to EP08715013.2A priority patent/EP2192742B1/en
Priority to BRPI0817468-7A priority patent/BRPI0817468B1/pt
Priority to JP2010520398A priority patent/JP4981971B2/ja
Publication of WO2009024006A1 publication Critical patent/WO2009024006A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/12—Access point controller devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1046—Call controllers; Call servers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1045—Proxies, e.g. for session initiation protocol [SIP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1069—Session establishment or de-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1073—Registration or de-registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/24—Accounting or billing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/12—Setup of transport tunnels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols
    • H04W80/10—Upper layer protocols adapted for application session management, e.g. SIP [Session Initiation Protocol]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/18—Service support devices; Network management devices
    • H04W88/181—Transcoding devices; Rate adaptation devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications

Definitions

  • IP multimedia subsystem Access ground session controller, IP multimedia subsystem and registration session method thereof
  • the present invention relates to an IP Multimedia Subsystem (IMS) network technology, and in particular, to an access session controller, an IMS, and a method for establishing a session and registering the terminal.
  • IMS IP Multimedia Subsystem
  • the existing IMS network is divided into access layer 9, session control layer 8, and application layer 7 by the operation and charging support system 6, and the access layer 9 includes a GPRS gateway support node (GGSN). 91.
  • the IMS system is located at the session control layer 8 in the network, and supports an IMS service control interface (ISC) 75.
  • the ISC interface 75 supports application servers 71 and 73 that provide supplementary services and self-owned value-added services, and supports service capability servers that provide third-party services.
  • the structure of the IMS system 10 is as shown in FIG. 17, and includes a Proxy-Call Session Control Function (P-CSCF) module 161, an Interrogating-CSCF (I-CSCF) module 163, Service-Call Session Control Function (S-CSCF) module 162, Media Gateway Control Function (MGCF) module 14, Multimedia Resource Function Controller (abbreviation) MRFC) 13. Multimedia Resource Function Processor (MRFP) 11. IMS Media Gateway (IMS-MGW) 12.
  • P-CSCF Proxy-Call Session Control Function
  • I-CSCF Interrogating-CSCF
  • S-CSCF Service-Call Session Control Function
  • MGCF Media Gateway Control Function
  • MRFC Multimedia Resource Function Controller
  • MRFP Multimedia Resource Function Processor
  • IMS-MGW IMS Media Gateway
  • Outbound gateway control function (BGCF) module 15 attribution A physical entity such as a Home Subscribe Service (HSS) 17; wherein, the S-CSCF 162 is the control core of the IMS system, the P-CSCF 161 is the entry of the IMS user access network, and the P-CSCF 161 takes the user from the user.
  • HSS Home Subscribe Service
  • the service request is forwarded to the S-CSCF 162, which is processed by the service platform of the home network; MGCF 14 and IMS-MGW 12 For IMS system 10 and UMTS Interworking between the network CS domain and the public switched telephone network (PSTN) 1; MRFC 13 and MRFP 11 provide the media resources and related control functions required in the service; BGCF 15 is between the IMS network 2 and the external network The demarcation point is selected by the BGCF 15 and the connection point of the CS domain and the PSTN network 1.
  • Legacy mobile signaling networks 3 are connected to HSS 17 through interfaces Gr, Gc, C, D; IMS network 2, and MRJFP 11, and between MRFP 11 and IMS-MGW 12 are connected through interface Mb.
  • PSTN 1 is connected to IMS-MGW 12 and MGCF 14 through interface PSTN; IMS-MGW 12 is connected to MGCF 14 via interface Mn; BGCF 15 is connected, BGCF 15 and IMS network 2 are connected through interface Mk. BGCF 15 is connected to MGCF 14 via interface Mj; MGCF 14 is connected to S-CSCF 162 via interface Mg; MRFP 11 is connected to MRFC 13 via interface Mp; MRFC 13 is connected to S-CSCF 162 Mr connection; BGCF 15 and S-CSCF 162 are connected through interface Mi; P-CSCF 161, S-CSCF 162 and I-CSCF 163 are connected through interface Mw; IMS network 2 is passed between S-CSCF 162 Interface Mm connection; S-CSCF 162 and HSS 17, SLF 18, AS 5 are connected through interfaces Cx, Dx, ISC respectively; P-CSCF 161 and terminal 4 are connected through interface Gm; AS 5 and HSS 17, SLF 18 is connected through interfaces Sh ( Si
  • the existing IMS system has problems: The system structure is too complicated, resulting in too many links in the call signaling processing process, and the session establishment process takes too long.
  • the initial call request (Invite) message sent by the terminal first arrives at P. -CSCF, then the P-CSCF routes the Invite message to the S-CSCF of the calling user, triggers the service; and then determines the S-CSCF where the called user is located through the I-CSCF of the called network, and the Invite message arrives at the called user.
  • the S-CSCF triggers the service
  • the Invite message is sent to the P-CSCF where the called user is located, and finally reaches the called user. If the calling user and the called user are roaming, the call signaling process will be more complicated, the signaling interaction in the network will be more, and the delay in the session establishment process will be greater. Summary of the invention
  • An aspect of the embodiments of the present invention is to provide an access session session controller to simplify the signaling department. Process.
  • Another aspect of an embodiment of the present invention is to provide an IP multimedia subsystem to streamline signaling processing procedures and reduce network complexity.
  • a further aspect of the embodiments of the present invention is to provide a method for establishing a session by an IP multimedia subsystem, so as to simplify the establishment of a session flow, shorten the session establishment time, and improve the session establishment efficiency.
  • a further aspect of the embodiments of the present invention is to provide a method for registering a terminal by an IP multimedia subsystem, so as to simplify the terminal registration process and improve registration efficiency.
  • An embodiment of the present invention provides an access session session controller, including: a message receiving module, a session control module, a service trigger configuration module, and a message sending module, where the message receiving module is configured to receive a call from a user. a request message and a response message, or a call request message and a response message from the network device; the service trigger configuration module is configured to configure the trigger information; the session control module is configured to determine the call request according to the trigger information configured by the service trigger configuration module When the message or the response message satisfies the condition of triggering the application server, generating a command to trigger the corresponding application server message, and establishing, maintaining, and releasing the session.
  • the session request message is directly sent to the called user.
  • the inbound session controller or the corresponding egress gateway controls the command of the function module; the message sending module is configured to send a message according to the command of the session control module.
  • the service triggering configuration module and the session control module can directly send the call request message sent by the user to the access location session controller to which the called user belongs, and the called user application server and the calling user belong to the same access.
  • the signaling process between the calling and called users can be sent to the calling and called terminals only after being processed by an access session session controller, which simplifies the signaling processing flow and improves the processing of the call request message. s efficiency.
  • IP multimedia subsystem including the access session session controller, a network-wide home subscriber service system, and the entire network home subscriber service system and the access.
  • the local session controller is connected to store user information of the entire network and its index for query by the access session controller.
  • the solution enables the IP multimedia subsystem to be connected by the access session by accessing the session session controller.
  • the controller directly processes or triggers the request message sent by the user to the corresponding application server, simplifies the signaling processing flow, improves the signaling processing efficiency, and greatly simplifies the IP multimedia sub-subscribing through the user service system of the entire network. System network.
  • Yet another aspect of the present invention provides, by some embodiments, a method for establishing a session in an IP Multimedia Subsystem: an access venue session controller in an IP Multimedia Subsystem receives a call request message; And configuring the triggering information to determine that the call request message meets a condition for triggering the application server, triggering a corresponding application server; and the accessing session session controller establishes a session according to the message returned by the corresponding application server.
  • the solution directly routes the call request message sent by the user to the access location session controller to which the called user belongs, and the called user-application server and the calling user belong to the same access session control.
  • the signaling process between the calling and called users can be sent to the calling and called terminals through the processing of an access session session controller, and the corresponding operation is performed, thereby avoiding multiple forwarding of the call request message, simplifying
  • the session establishment process improves the efficiency of session establishment.
  • a further aspect of the present invention provides, by some embodiments, a method for registering a terminal in an IP multimedia subsystem, including:
  • the access location session controller in the IP multimedia subsystem After receiving the registration request message sent by the user terminal, the access location session controller in the IP multimedia subsystem sends a multimedia authentication request message to the user server system of the entire network;
  • the authentication condition of the user who sends the registration request message to the access location session controller
  • the access session session controller obtains the user's authentication information from the user terminal; and when the authentication information meets the authentication condition, sends a server allocation request message to the entire network home user server system, After receiving the server allocation response message returned by the user-home server system and the related data of the user, returning a registration success message to the user; determining that the authentication information does not satisfy the authentication condition , sending a registration failure message to the user.
  • the solution requests the authentication information from the user server system of the entire network through the registration request message sent by the user through the access session controller, which avoids the multiple forwarding of the registration request message, and the registration process is improved, thereby improving the registration efficiency. .
  • the technical solution of the present invention will be further described in detail below through the accompanying drawings and embodiments.
  • Embodiment 1 is a schematic structural diagram of Embodiment 1 of an access session session controller according to the present invention.
  • Embodiment 2 is a schematic structural diagram of Embodiment 2 of an access session session controller according to the present invention.
  • FIG. 3 is a schematic structural diagram of an embodiment of an IP multimedia subsystem according to the present invention.
  • FIG. 4 is a schematic diagram showing the network structure of the IP multimedia subsystem on the basis of FIG. 3;
  • FIG. 5 is a flowchart of an embodiment of a method for registering a terminal by an IP multimedia subsystem according to the present invention
  • Figure 6 is a signaling flow diagram corresponding to Figure 5;
  • FIG. 7 is a flowchart of Embodiment 1 of a method for establishing a session of an IP multimedia subsystem according to the present invention
  • FIG. 8 is a signaling flowchart corresponding to FIG. 7;
  • FIG. 9 is a flowchart of Embodiment 2 of a method for establishing a session by an IP multimedia subsystem according to the present invention
  • FIG. 10 is a signaling flowchart corresponding to FIG. 9;
  • FIG. 11 is a flowchart of Embodiment 3 of a method for establishing a session of an IP multimedia subsystem according to the present invention
  • FIG. 12 is a signaling flowchart corresponding to FIG. 11;
  • FIG. 13 is a flowchart of another embodiment of a method for establishing a session by an IP multimedia subsystem according to the present invention
  • FIG. 14 is a flow chart of an embodiment of releasing a session in a method for establishing a session by an IP multimedia subsystem according to the present invention
  • Figure 15 is a signaling flow chart corresponding to the item of Figure 14;
  • FIG. 17 is a schematic structural diagram of an IP multimedia subsystem in the prior art. detailed description
  • the access site session controller includes a message receiving module 061, a registration control module 062, a service trigger configuration module 063, a session control module 064, and a message sending module 065.
  • the message receiving module 061 is configured to receive from The registration request message, the call request and the response message of the user terminal; or the call request and response message from the network device, such as the application server, the message sent by the user terminal does not need to be forwarded by the existing P-CSCF or the I-CSCF, and can be directly sent and received.
  • the registration control module 062 is configured to control the registration process of the user.
  • the user service system belongs to the entire network.
  • the authentication information of the requesting user terminal is determined according to the authentication information obtained from the user service system of the entire network, whether the user passes the authentication, and reports the status of the registration, such as whether the registration is completed, to the user service of the entire network.
  • the system maintains the registration status information of the user in a subsequent process; enables the access session controller to directly control the registration process of the user terminal.
  • the service trigger configuration module 063 is used to store and configure trigger information, such as a URI mapping table between the called number and the corresponding application server.
  • the session control module 064 compares the call request or response message with the trigger information stored in the service trigger configuration module 063, and determines whether the trigger condition is met. For example, whether the called number in the call request message is stored in the service trigger configuration module 063 is satisfied. When the trigger condition is met, the session control module 064 links the URI corresponding to the called number, triggers the corresponding application server; avoids calling the request message from the P-CSCF to the S-CSCF or even from the P-CSCF to the I-CSCF before triggering the application server.
  • the multiple forwarding to the S-CSCF greatly simplifies the processing flow of the call request message and improves the processing efficiency of the call request.
  • the session control module 064 also creates and maintains a session table according to the call request information received by the message receiving module 061, and releases the session after the session ends.
  • the processing flow is similar to the prior art, except that the present invention is processed by the access session controller.
  • the message returned by the application server indicates that the user is not eligible for the session.
  • the session control module 064 refuses to establish the session;
  • the session control module 064 triggers the corresponding application server or refuses to establish a session, the session control module 064 first generates a command for sending a corresponding message, such as a command to send a call request message, a response message, and a refusal to establish a session message, and is executed by the message sending module 065. send.
  • the session control module 064 generates a command to directly route the call request message to the access location session controller or the corresponding egress gateway control function module where the called user is located in the session establishment process, and the session sending control module 065 performs session control.
  • the command of module 064 sends a call request message.
  • the message receiving module 061 and the message sending module 065 can be coupled together.
  • the call request message is determined by the registration control module 062 to be initiated by the authenticated user, or initiated by the network device, or initiated by the unauthenticated user according to the deployment policy of the network.
  • the access session control The registration control module 062 can be omitted in the device, for example, when the user dials an emergency call such as 110, there is no need to register.
  • the session control module processes the release session request message and releases the session.
  • the user service system of the entire network belongs to the description in the IP multimedia subsystem embodiment.
  • the access session controller further includes a routing module 066, and the routing module 066 is configured to use the user in the call request message. ID, query the user service system of the entire network and the corresponding server that performs the domain name service (referred to as the DNS server), and combine the relevant routing policy to find the address information forwarded by the next hop message, such as the address of the session controller of the other party. Information, or address information of the BGCF.
  • the session control module 064 releases the session according to the message returned by the triggered application server, establishes a session between the user and the application server, or routes the call request message to the called end; when the call request message needs to be routed to the called end, the session control The module 064 directly forwards the call request message to the access location session controller of the called end according to the address information found by the routing module 066; or, if the trigger condition is met, further forwards the message returned by the triggered application server to The called end accesses the local session controller; avoids the multiple forwarding of the call request message from the calling P-CSCF to the S-CSCF to the called S-CSCF before being sent to the called party, and even avoids From the calling P-CSCF to the I-CSCF to the S-CSCF and then to the called I-CSCF and then to the called S-CSCF for multiple forwarding, the processing flow of the call request message is greatly simplified, and the call request message is improved. The processing efficiency shortens the session establishment time.
  • the session control module 064 is further configured to maintain state information of the session. In the case that a plurality of users initiate a call request message, the session control module further associates other messages generated in the process of processing the call request message of the user according to the user identifier of the user, so that the access session controller accurately processes each user. Call request message.
  • the access session controller further includes a signaling compression module, and compresses the SIP. Interest, can save the transmission bandwidth of the network.
  • the access session controller further includes a charging module for charging according to a session established by the call request message, such as charging by a call detail record (CDR).
  • a charging module for charging according to a session established by the call request message, such as charging by a call detail record (CDR).
  • CDR call detail record
  • IP Multimedia Subsystem an IP Multimedia Subsystem (IMS) 00 and a Public Switched Telephone Network (PSTN) 1.
  • IP Multimedia Subsystem Network or a Simplified IP Multimedia Subsystem Network 2.
  • PSTN Public Switched Telephone Network
  • the network 3, the terminal 4 and the application server 5 are communicatively connected, and the IMS 00 includes: MRFP 01, IMS-MGW 02, MRFC 03, MGCF 04, BGCF 05, access ground controller (A-CSCF) 06 and the whole network Home subscriber service system 07.
  • A-CSCF access ground controller
  • the MRFC 03 parses the information of the A-CSCF 0-6 and performs corresponding operations, such as applying for resources, releasing resources, or modifying resources; MGCF 04 selects A-CSCF 06 according to the called number and the incoming call. And complete the call control protocol conversion between PSTN 1 and IMS 00; BGCF 05 selects the appropriate PSTN 1 interface point or interface point of the CS domain according to the call request from A-CSCF 06, thereby routing the call to PSTN 1 or CS A network connected to the pointcut of the domain, or a simplified IMS network 2 that is routed to or consists of the IMS system of the present invention; A-CSCF 06 routes the call request from terminal 4 to the corresponding network element, such as determining that the call request satisfies the trigger When the condition is met, the corresponding application server 5 is triggered to route the call request to the application server 5; and the A-CSCF 06 obtains the authentication information from the entire network home subscriber service system 07 according to the registration request sent by the terminal 4,
  • the A-CSCF 06 can be implemented by the A-CSCF provided in the above controller embodiment.
  • the user service system 07 of the entire network may use the data and the index to separate the user information of the entire network, such as the user's authentication and authentication information, the accessed A-CSCF information, the service information, and the index corresponding to the information data. Therefore, the amount of saved data can be arbitrarily expanded to meet the requirements for storing user information data of the entire network. For example, UTSTARCOM's MmHLR server and Oracle's large distributed database can be used to set up the entire network. Local User Service System 07.
  • the A-CSCF and the entire network-owned user service system greatly simplify the IP multimedia subsystem.
  • the IMS network consisting of the above system embodiments is also greatly simplified, as shown in FIG.
  • a unified network-wide home subscriber service system 07 is constructed by using distributed computer technology, so that the session control function of each region can be implemented by using the unified A-CSCF 06 entity without distinguishing between the home location and the roaming place.
  • FIG. 5 is a flowchart of an embodiment of a method for registering a terminal by an IP multimedia subsystem according to the present invention
  • FIG. 6 is a signaling flowchart corresponding to FIG. 5.
  • Step 101 After receiving the "Register” message 101, the A-CSCF sends a multimedia authentication request message (MAR) 102 directly to the home service system of the entire network, and requests the user service system from the entire network.
  • MAR multimedia authentication request message
  • Step 102 The user service system of the entire network returns a multimedia authentication response message (MAA) 103 containing the authentication information of the user terminal to the A-CSCF.
  • MAA multimedia authentication response message
  • Step 103 The A-CSCF sends an unauthorized (401) message 104 to the terminal according to the received authentication information of the user terminal, and initiates an authentication challenge to the terminal.
  • Step 104 The A-CSCF receives the "Register" message 105 sent by the terminal to the network, and includes the information about the rights registered by the terminal itself, and determines the sending of the user terminal according to the authentication information sent by the user service system of the entire network. Whether the authentication information matches, thereby determining whether the user terminal passes the authentication. If the user terminal passes the authentication, step 105 is performed; otherwise, step 108 is performed.
  • Step 105 The A-CSCF sends a server allocation request message (SAR) 106 to the home service system of the entire network, and requests the user service system of the entire network to store the ID information of the A-CSCF, and then the other A-CSCF or the local
  • SAR server allocation request message
  • the A-CSCF receives the call request message of the user terminal as a called party
  • the A-CSCF serving the user can be found according to the ID information, and the call request message is routed to the A-CSCF connection call corresponding to the ID information.
  • Step 106 The user service system of the entire network returns a server allocation response message (SAA) 107 to the A-CSCF, accepts the request of the A-CSCF, and returns service data related to the user terminal.
  • SAA server allocation response message
  • Step 107 The A-CSCF returns a registration success message (200 OK) 108 to the terminal, and the registration is successful.
  • Step 108 The A-CSCF sends a registration failure (403) message to the terminal.
  • the A-CSCF is directly allocated to the user terminal in the access network, and the registration request message of the user terminal is received, thereby avoiding multiple forwarding of the registration request message between the P-CSCF, the S-CSCF, and the I-CSCF.
  • the A-CSCF can directly initiate a multimedia authentication request to the HSS of the entire network, which greatly simplifies the registration process and improves the registration efficiency.
  • the contracted service can be used to establish a session through the IMS system provided by the embodiment of the present invention.
  • FIG. 7 is a flowchart of Embodiment 1 of a method for establishing a session of an IP multimedia subsystem according to the present invention
  • FIG. 8 is a signaling flowchart corresponding to FIG. 7. It is assumed that a certain user terminal initiates a request for creating a conference to any of the IMSs provided in the foregoing system embodiment. Since the conference embodiment is not yet created, the general resource of the conference factory is used in the initial call request message (Invite) 201. Identification (Ut).
  • the process of establishing a session by IMS includes:
  • Step 201 The A-CSCF in the IMS receives the "Invite” message 201, and then determines whether the "Invite” message 201 satisfies the condition for triggering the AS. If yes, step 202 is performed; otherwise, step 210 is performed.
  • Step 202 The A-CSCF triggers the "Invite" message 201 to the ASO according to the initial filtering criterion (iFC). Since the user terminal uses the URI of the conference factory when requesting the conference, the AS receives the "Invite" message 201. Then, the URI of the conference embodiment is started, and the session description protocol information (SDP) usable in the conference is sent to the A-CSCF through the scheduled time notification (183) message 202; meanwhile, the connection resource of the conference is created in the MRFP.
  • SDP session description protocol information
  • Step 203 The A-CSCF forwards the "183" message 202 to the user terminal. After receiving the "183" message 202, the user terminal passes the SDP information selected by the user through the temporary response (Prack) message 203. Send to A-CSCF and start applying for local resources.
  • Prack temporary response
  • Step 204 The A-CSCF forwards the "Prack" message 203 to the AS, and the AS responds to the "Prack” message 203 of the user terminal, and sends a response message (200 OK) 204 to the A-CSCF, which can carry the SDP in the information. information.
  • Step 205 The A-CSCF forwards the "200 OK" message 204 to the user terminal; the user terminal updates the SDP information, and sends the updated SDP to the A-CSCF through an update message (Update) 205.
  • Update update message
  • Step 206 The A-CSCF forwards the "Update” message 205 to the AS, and the AS sends a "200 OK” message 206 to the A-CSCF in response to the "Update” message 205, and the MRFP opens the media connection with the terminal.
  • Step 207 The A-CSCF forwards the "200 OK" message 206 to the user terminal.
  • Step 208 The A-CSCF receives the response message ""@200 OK” message 207 of the "Invite” message 201 returned by the AS, and forwards it to the user terminal; the "Contact" header of the "200 OK” message 207 is carried.
  • the URI of the conference embodiment after receiving the "200 OK” message 207 carrying the conference embodiment URI, the user terminal sends a response message (ACK) 208 confirming "Invite" to the A-CSCF, confirming that the conference is successfully created.
  • ACK response message
  • Step 209 The A-CSCF forwards the "ACK" message 208 to the AS to complete the establishment of the session.
  • the A-CSCF when the calling terminal uses the prepaid service, the A-CSCF first triggers the application server of the prepaid service after receiving the "Invite" message initiated by the terminal, and determines the message according to the message returned by the prepaid service application server. Whether the user terminal has the ability to pay the current service, and if yes, continue to determine whether the "Invite" message satisfies the conditions for triggering the other application server. If the condition for triggering the creation of the conference application server is met in this embodiment, the application server is continuously triggered. . If the account balance of the user is insufficient, the application server returns a message to the A-CSCF, informing the A-CSCF that the user account balance is insufficient, and the A-CSCF sends a message to the terminal to refuse to establish a session.
  • the embodiment receives the "Invite" message of the user terminal through the A-CSCF, and avoids multiple forwarding of the "Invite” message between the P-CSCF, the S-CSCF, and the I-CSCF before the AS is triggered, so that the terminal issues "Invite”. "After the message, the AS can be triggered directly by the A-CSCF based on the "Invite” message.
  • the session establishment or call flow shortens the session establishment time and improves the session establishment efficiency.
  • FIG. 9 is a flowchart of Embodiment 2 of a method for establishing an IP multimedia subsystem according to the present invention
  • FIG. 10 is a signaling flowchart corresponding to FIG. 9.
  • a certain terminal UE-1 sends an "invite" message 301 to any IMS provided in the above system embodiment, and calls another terminal UE-2, UE_1 applies for a calling number display restriction service, and UE-2 applies for the main Calling the number display service;
  • the A-CSCF corresponding to UE-1 is A-CSCF_1, the application server corresponding to the calling number display restriction service is AS-1;
  • the A-CSCF corresponding to UE_2 is A-CSCF-2, the calling number is displayed.
  • the application server corresponding to the service is AS-2;
  • the process of establishing the session by the called terminal IMS includes:
  • Step 301 The A-CSCF-1 receives the "invite” message 301, and then determines whether the "invite” message 301 satisfies the condition of contacting the AS. In this embodiment, the "invite” message 301 satisfies the condition of triggering AS-1.
  • Step 302 A-CSCF-1 triggers AS-1, and routes the "invite” message 301 to AS_1; AS-1 receives the "invite” message 301, and then executes the relevant service control logic, for example, "invitation” In message 301, the value of the "Privacy" header field is modified to "id”; then the modified "invite” message 302 is sent to A-CSCF-1;
  • Step 303 The A-CSCF-1 sends a Location Information Request message (LIR) 303' to the user service system of the entire network to request to query the location or address information of the A-CSCF where the UE_2 is located.
  • LIR Location Information Request message
  • Step 304 The home network home service system returns a location information response message (LIA) 304, where the message carries the location or address information of the A-CSCF where the UE-2 is located, which is A-CSCF-2 in this embodiment.
  • LIA location information response message
  • Step 305 A-CSCF-1 routes the "invite" message 302 to A-CSCF-2 according to LIA message 304.
  • Step 306 The A-CSCF-2 determines whether the "invite" message 302 satisfies the condition for triggering the AS. In this embodiment, the "invite" message 302 satisfies the condition of triggering AS-2.
  • Step 307 A-CSCF-2 routes the "invite” message 302 to AS-2; AS-2 knows that the calling number cannot be displayed according to the "Privacy” value in the invite message 302, so “invite” The display name in "Message 302" is changed to “anonymous” and then the modified "invite” is sent to A-CSCF_2. Interest 305,.
  • Step 308 A-CSCF-2 routes the modified "invite" message 305 to UE-2;
  • Step 309 A-CSCF-2 performs corresponding coordination and control between UE-2 and AS_2 according to service requirements, such as forwarding "183" message 306, "Prack” message 307', "200 OK” message 308, etc. , until the "ACK" message is forwarded, the establishment of the session is completed.
  • A-CSCF-1 and A-CSCF-2 are the same A-CSCF.
  • the "invitation" message is received by the A-CSCF, which avoids multiple forwarding of the "invite” message between the P-CSCF, the S-CSCF and the I-CSCF of the calling and called terminals before the AS is triggered, so that the terminal issues "
  • the invite" message can directly trigger the AS by the A-CSCF according to the "invite” message, which greatly simplifies the session establishment or call flow, shortens the session establishment time, and improves the session establishment efficiency.
  • FIG. 11 is a flowchart of Embodiment 3 of a method for establishing a session of an IP multimedia subsystem according to the present invention
  • FIG. 12 is a signaling flowchart corresponding to FIG. 11.
  • a certain terminal UE-1 sends an "invite" message 301 to any IMS provided in the above system embodiment, and calls another terminal UE_2, and the A-CSCF corresponding to UE_1 is A-CSCF_1, the A-CSCF corresponding to UE_2 is A-CSCF-2, and the process of establishing the ⁇ by the called terminal IMS includes:
  • Step 401 The A-CSCF-1 determines the "invite" message 401. After the condition of triggering the AS is not met, the "LIR" message 402 is sent to the user service system of the entire network, and the A-CSCF where the UE_2 is located is requested to be queried.
  • Step 402 The user service system of the entire network returns a "LIA" message 403 to the A-CSCF-1, and a message 403 of the "LIA" message 403, which carries the address information of the A-CSCF where the UE-2 is located, which is A in this embodiment.
  • Step 403 The A-CSCF-1 routes the "invite" message 401 to the A-CSCF-2 according to the "LIA" message 403' returned by the user service system of the entire network.
  • Step 404 The A-CSCF-2 determines whether the "invite" message 401 satisfies the condition for triggering the AS.
  • the "invite" message 401 satisfies the assumption that the application server that triggers the calling number display service is assumed to be AS-2 conditions.
  • Step 405 A-CSCF-2 routes the "invite” message 401 to AS-2 according to iFC; AS-2 first determines whether the "invite” message 401 ' carries the "Private” header field, if not carried, or its value is not For "id” and "user", indicating that UE-1 does not use the Calling Number Identification Restriction (CLIR) service, AS-2 modifies "P-Asserted-Identity" header field according to " invite” message 401.
  • the invite “message 401 which is an "invite” message 404, displays the UE-1 user number to the UE-2 and sends an "invite” message 404 to the A-CSCF-2.
  • Step 406 The A-CSCF-2 routes the "invite" message 404 to the UE-2; the UE_2 displays the user number of the UE-1 according to the "invite” message 404, and the modified calling party information in the AS-2, which needs to be explained.
  • the specific information of which header field is displayed as the calling number depends on different networks, and will not be described here.
  • AS-2 then sends a "183" message 405 to A-CSCF-2.
  • Step 407 A-CSCF-2 forwards the "183" message 405 to AS-2;
  • Step 408 A-CSCF-2 performs corresponding coordination and control between UE-2 and AS_2 according to service requirements, such as forwarding "Prack” message, "200 OK” message, etc. until forwarding "ACK” message, completing the session. set up.
  • service requirements such as forwarding "Prack” message, "200 OK” message, etc. until forwarding "ACK” message, completing the session. set up.
  • AS_2 determines that the account balance is insufficient, and then informs A-CSCF-2 of the information, and A-CSCF-2 refuses to establish a session at this time, and informs UE_2.
  • the A-CSCF-2 in step 405 routes the "invite" message 401 to the AS-2, as shown in Figures 12 and 13, performing the following operations:
  • Step 501 A-CSCF_2 continues to determine whether the "invite” message satisfies the condition for triggering other application servers.
  • the called number in the "invite” message satisfies the condition for triggering the unanswered forwarding application server such as AS-3, and thus A-CSCF-2 uses "invite” message 404 to trigger AS-3, AS-3 starts the timer and returns "invite” message 404;
  • Step 502 A-CSCF 2 sends the "invite” message 404 returned by AS-3 to U£-2; UE-2 Returning a ringing message ("180" message) 501, to AS-3, AS-3 sends a "180" message 50 ⁇ to A-CSCF-2;
  • Step 503 A-CSCF-2 forwards the "180" message 501 to 1 through A-CSCF-1; £-1 1; £-1 ringing; AS_3 determines whether UE-2 is at a predetermined time by timer timing Internal response; when the predetermined time is exceeded, AS-3 sends a response forwarding message ("181" message) 502 to A-CSCF-2;
  • Step 504 A-CSCF-2 forwards the "181" message 502 to the UE-1 through the A-CSCF-1, notifying that the calling party is transferring the call to a third party terminal such as UE-3;
  • Step 505 The A-CSCF_2 receives the "invite" message 503 initiated by the AS-3, and transfers the call to the UEJ.
  • the processing flow is similar to the existing call initiation process.
  • the A-CSCF can also release the session if the session is completed.
  • the example in which the called terminal initiates the release request message, as shown in FIG. 14 15 specifically includes:
  • Step 601 The called terminal UE-2 issues a "bye" request message 601.
  • the A-CSCF-2 receives the "bye” request message 601, and then determines whether the condition for triggering the application server is met, and if so, if the trigger is satisfied.
  • AS-2 Then, the "bye" request message 601 is sent to the AS_2 AS-2 to analyze the received "bye” request message 601, perform the related operation, and send the processed "bye” request message 601 back to the A-CSCF_2. Otherwise, step 602 is performed;
  • Step 602 A-CSCF-2 routes the "bye" request message 601 to the calling end A-CSCF_1;
  • Step 604 A-CSCF-1 sends a "bye" request message 601 to the calling terminal UE-1; UE_1 returns a "200 OK" message 602;
  • Step 605 The "200 OK" message 602 returns to UE_2 after the similar processing as described above, and the session is released.
  • the release session request message may also be initiated by the calling terminal, the calling end A-CSCF, the application server, or the called end A-CSCF.
  • the processing flow is similar to the existing release session flow, except that all the release session processing in this embodiment is performed. Into the ground session controller to complete.
  • This embodiment receives the "invite” message through the A-CSCF, and avoids forwarding to the called terminal CSCF.
  • the previous "invite” message is forwarded multiple times between the P-CSCF, the S-CSCF and the I-CSCF of the calling and called terminals, and also avoids the "invite” before the triggering of the AS, the message at the called end of the P-CSCF, S- Multiple forwarding between the CSCF and the I-CSCF enables the terminal to issue an "invite" message to be directly routed by the calling A-CSCF to the called A-CSCF, and the called A-CSCF triggers the AS according to the "invite” message.
  • the session establishment or call flow is greatly simplified, the session establishment time is shortened, and the session establishment efficiency is improved.

Description

接入地会话控制器、 IP多媒体子系统及其注册会话方法 技术领域
本发明涉及一种 IP多媒体子系统（IMS ) 网络技术, 尤其涉及一种接入 地会话控制器、 IMS及其建立会话、 对终端进行注册的方法。 背景技术
如图 16所示，现有 IMS网络在运营和计费支持系统 6支持下分为接入层 9、会话控制层 8、应用层 7三层，接入层 9包括 GPRS网关支持结点（GGSN ) 91、 GPRS服务支持结点 （ SGSN ) 92以及 IP接入网络 93, 终端在接入层 9 接入后享受 IMS系统提供的服务。 IMS系统位于网络中的会话控制层 8， 支 持 IMS业务控制接口 （ISC ) 75， 通过 ISC接口 75支持提供补充业务、 自有 增值业务的应用服务器 71、 73, 支持提供第三方业务的业务能力服务器 74以 及原智能网业务平台 72; 其中，应用服务器 71、 73基于会话启动协议（SIP ), 业务能力服务器 74基于开放业务结构 （OSA )。 IMS系统 10结构如图 17所 示， 包括代理呼叫会话控制功能 (Proxy-Call Session Control Function, 简称 P-CSCF)模块 161、询问呼叫会话控制功能（ Interrogating-CSCF，简称 I-CSCF ) 模块 163、 业务呼叫会话控制功能 (Service-Call Session Control Function, 简称 S-CSCF)模块 162、媒体网关控制功能 (Media Gateway Control Function, 筒称 MGCF)模块 14、 多媒体资源功能控制器 (Multimedia Resource Function Controller, 简称 MRFC)13、 多媒体资源功能处理器 (Multimedia Resource Function Processor, MRFP)11、 IMS 媒体网关（IMS Media Gateway, 简称 IMS-MGW) 12、 出口网关控制功能 (Breakout Gateway Control Function, BGCF) 模块 15、 归属地用户服务器 (Home Subscribe Service, 简称 HSS)17等物理实 体； 其中， S-CSCF 162是 IMS系统的控制核心, P-CSCF 161是 IMS用户接 入网络的入口， P-CSCF 161把来自用户的业务请求转发到 S-CSCF 162, 由归 属网络的业务平台处理； MGCF 14和 IMS-MGW 12提供 IMS系统 10和 UMTS 网络 CS域、 公共电话交换网 （PSTN ) 1之间的互通； MRFC 13和 MRFP 11 提供业务中所需的媒体资源以及相关的控制功能； BGCF 15是 IMS网络 2，和 外部网络的之间的分界点，由 BGCF 15选择和 CS域、 PSTN网络 1的连接点。 遗留移动信令网络 ( Legacy mobile signaling Networks ) 3与 HSS 17通过接口 Gr、 Gc、 C、 D接口相连； IMS网络 2，与 MRJFP 11之间、 MRFP 11与 IMS-MGW 12之间通过接口 Mb相连； PSTN 1与 IMS-MGW 12、 MGCF 14之间通过接 口 PSTN连接； IMS-MGW 12与 MGCF 14之间通过接口 Mn连接； BGCF 15 之间、 BGCF 15与 IMS网络 2，之间通过接口 Mk连接； BGCF 15与 MGCF 14 之间通过接口 Mj连接； MGCF 14与 S-CSCF 162之间通过接口 Mg连接; MRFP 11与 MRFC 13之间通过接口 Mp连接； MRFC 13与 S-CSCF 162之间通过接 口 Mr连接； BGCF 15与 S-CSCF 162之间通过接口 Mi连接； P-CSCF 161、 S-CSCF 162与 I-CSCF 163之间通过接口 Mw连接； IMS网络 2，与 S-CSCF 162 之间通过接口 Mm连接； S-CSCF 162与 HSS 17、 SLF 18、 AS 5之间分别通 过接口 Cx、 Dx、 ISC连接； P-CSCF 161与终端 4之间通过接口 Gm连接； AS 5与 HSS 17、 SLF 18之间分别通过接口 Sh ( Si )、 Dh连接； 上述接口详见 标准 3GPP TS 23.002。
现有 IMS系统存在问题有： 系统结构过于复杂， 导致呼叫信令处理流程 中环节过多， 会话建立过程时间过长， 如， 一次呼叫中， 终端发出的初始呼 叫请求（Invite )消息首先到达 P-CSCF, 然后由 P-CSCF把 Invite消息路由到 主叫用户的 S-CSCF, 触发业务； 再通过被叫网络的 I-CSCF确定被叫用户所 在的 S-CSCF, Invite消息到达被叫用户所在的 S-CSCF,触发业务之后， Invite 消息被送到被叫用户所在的 P-CSCF, 最终到达被叫用户。 如果主叫用户和被 叫用户处于漫游状态， 那么呼叫信令流程将更加复杂， 网络中的信令交互更 多， 会话建立过程的时延也更大。 发明内容
本发明实施例的一方面在于提出一种接入地会话控制器， 以简化信令处 理流程。
本发明实施例的另一方面在于提出一种 IP多媒体子系统， 以筒化信令处 理流程， 降低网络的复杂性。
本发明实施例的又一方面在于提出一种 IP 多媒体子系统建立会话的方 法， 以简化建立会话流程， 缩短会话建立时间， 提高会话建立效率。
本发明实施例的又一方面在于提出一种 IP多媒体子系统对终端注册的方 法， 以简化终端注册流程， 提高注册效率。
本发明一方面通过一些实施例提供了一种接入地会话控制器， 包括： 消 息接收模块、 会话控制模块、 业务触发配置模块及消息发送模块， 其中， 消 息接收模块用于接收来自用户的呼叫请求消息及响应消息， 或者来自网络设 备的呼叫请求消息及响应消息； 业务触发配置模块用于配置触发信息； 会话 控制模块用于根据所述业务触发配置模块配置的触发信息， 确定所述呼叫请 求消息或响应消息满足触发应用服务器的条件时， 生成发送触发相应应用服 务器消息的命令， 并建立、 维护、 释放会话， 在会话建立过程中， 生成把会 话请求消息直接发送到被叫用户所在的接入地会话控制器或者相应的出口网 关控制功能模块的命令； 所述消息发送模块用于根据所述会话控制模块的命 令发送消息。
本方案通过业务触发配置模块及会话控制模块， 能够将用户发送的呼叫 请求消息直接发送到作为被叫用户所属的接入地会话控制器， 当被叫用户 应用服务器与主叫用户同属一个接入地会话控制器时， 主被叫用户之间的信 令流程只需经过一个接入地会话控制器的处理便可发送到主被叫端， 简化了 信令处理流程， 提高了处理呼叫请求消息的效率。
本发明另一方面通过一些实施例提供了一种 IP多媒体子系统， 包括所述 接入地会话控制器、 全网归属地用户服务系统； 所述全网归属地用户服务系 统与所述接入地会话控制器相连接， 用于存储全网的用户信息及其索引供所 述接入地会话控制器进行查询。
本方案通过接入地会话控制器， 使得 IP多媒体子系统能够由接入地会话 控制器直接对用户发送的请求消息进行处理或触发到相应的应用服务器， 简 化了信令处理流程， 提高了信令处理效率， 同时， 通过全网归属地用户服务 系统， 大大简化了 IP多媒体子系统网络。
本发明又一方面通过一些实施例提供了一种在 IP多媒体子系统中建立会 话的方法： IP 多媒体子系统中的接入地会话控制器接收呼叫请求消息； 所述 接入地会话控制器根据配置的触发信息， 确定所述呼叫请求消息满足触发应 用服务器的条件时， 触发相应的应用服务器； 所述接入地会话控制器根据所 述相应的应用服务器返回的消息建立会话。
本方案通过接入地会话控制器把用户发送的呼叫请求消息直接路由到作 为被叫用户所属的接入地会话控制器， 当被叫用户一应用服务器与主叫用户 同属一个接入地会话控制器时 , 主被叫用户之间的信令流程只需经过一个接 入地会话控制器的处理便可发送到主被叫端， 进行相应的操作， 避免了呼叫 请求消息的多次转发， 简化了会话建立流程， 提高了会话建立效率。
本发明再一方面通过一些实施例提供了一种在 IP多媒体子系统中对终端 注册的方法， 包括：
IP 多媒体子系统中的接入地会话控制器接收到用户终端发送的注册请求 消息后， 向全网归属地用户服务器系统发送多媒体鉴权请求消息；
所述全网归属地用户服务器系统向所述接入地会话控制器返回发送所述 注册请求消息的用户的鉴权条件；
所述接入地会话控制器从所述用户终端获取用户的鉴权信息； 确定所述 鉴权信息满足所述鉴权条件时， 向所述全网归属地用户服务器系统发送服务 器分配请求消息， 在接收到所述全网归属地用户服务器系统返回的服务器分 配响应消息以及所述用户的相关数据后， 向所述用户返回注册成功消息； 确 定所述鉴权信息不满足所述鉴权条件时， 向所述用户发送注册失败消息。
本方案通过接入地会话控制器直接 据用户发送的注册请求消息向全网 归属地用户服务器系统请求鉴权信息， 避免了注册请求消息的多次转发， 筒 化了注册流程， 提高了注册效率。 下面通过附图和实施例， 对本发明的技术方案做进一步的详细描述。 附图说明
图 1为本发明接入地会话控制器实施例一的结构示意图；
图 2为本发明接入地会话控制器实施例二的结构示意图；
图 3为本发明 IP多媒体子系统实施例的结构示意图；
图 4为图 3基 上 IP多媒体子系统网络结构示意图；
图 5为本发明 IP多媒体子系统对终端进行注册的方法实施例的流程图；
；图 6为与图 5相对应的信令流程图；
图 7为本发明 IP多媒体子系统建立会话的方法实施例一的流程图； 图 8为图 7对应的信令流程图；
图 9为本发明 IP多媒体子系统建立会话的方法实施例二的流程图； 图 10为与图 9相对应的信令流程图；
图 11为本发明 IP多媒体子系统建立会话的方法实施例三的流程图； 图 12为与图 11相对应的信令流程图；
图 13为本发明 IP多媒体子系统建立会话的方法另一实施例的流程图； 图 14为本发明 IP多媒体子系统建立会话的方法中释放会话实施例的流程 图；
图 15为与图 14项对应的信令流程图；
图 16为现有技术中 IMS网络结构示意图；
图 17为现有技术中 IP多媒体子系统结构示意图。 具体实施方式
控制器实施例一
图 1 为本发明接入地会话控制器实施例一的结构示意图， 接入地会话控 制器包括消息接收模块 061、 注册控制模块 062、 业务触发配置模块 063、 会 话控制模块 064及消息发送模块 065; 其中， 消息接收模块 061用于接收来自 用户终端的注册请求消息、 呼叫请求及响应消息； 或者来自网络设备如应用 服务器的呼叫请求及响应消息， 用户终端发送的消息无需经过现有 P-CSCF 或 I-CSCF转发， 可直接发送给接入地会话控制器； 注册控制模块 062用于控 制用户的注册过程， 具体来说， 在注册过程中， 注册控制模块 062从消息接 收模块接收到注册请求消息后， 向全网归属地用户服务系统请求用户终端的 鉴权信息， 根据从全网归属地用户服务系统中获得的鉴权信息， 判断用户是 否通过鉴权， 并把注册的状态如是否通过注册等信息汇报给全网归属地用户 服务系统， 在后续的过程中维护用户的注册状态信息； 使得接入地会话控制 器能够对用户终端的注册过程进行直接控制。 业务触发配置模块 063 用于存 储并配置的触发信息， 如被叫号码与相应应用服务器的 URI对应关系表等。 会话控制模块 064将呼叫请求或响应消息与业务触发配置模块 063存储的触 发信息相比较， 判断是否满足触发条件， 如业务触发配置模块 063 中是否存 储有呼叫请求消息中的被叫号码， 在满足触发条件时， 会话控制模块 064链 接被叫号码对应的 URI， 触发相应的应用服务器； 避免了触发应用服务器之 前将呼叫请求消息从 P-CSCF到 S-CSCF甚至是从 P-CSCF到 I-CSCF再到 S-CSCF的多次转发， 大大简化了呼叫请求消息的处理流程， 提高了呼叫请求 处理效率。 会话控制模块 064还根据消息接收模块 061接收到的呼叫请求信 息创建、 维护会话表， 以及在会话结束后释放会话， 处理流程与现有技术类 似， 只是本发明由接入地会话控制器来处理； 当呼叫请求消息不满足触发条 件， 或者会话控制模块 064触发应用服务器后， 应用服务器返回的消息表明 用户没有会话的资格， 如预付费用户的帐户余额不足时， 会话控制模块 064 拒绝建立会话； 上述会话控制模块 064触发相应应用服务器或拒绝建立会话 时， 首先由会话控制模块 064生成发送相应消息的命令， 如发送呼叫请求消 息、 响应消息、 拒绝建立会话消息等命令， 由消息发送模块 065执行发送。 并且， 会话控制模块 064在会话建立过程中， 生成把呼叫请求消息直接路由 到被叫用户所在的接入地会话控制器或者相应的出口网关控制功能模块的命 令， 由消息发送模块 065执行会话控制模块 064的命令， 发送呼叫请求消息。 消息接收模块 061与消息发送模块 065可耦合在一起。 其中所迷呼叫请求消 息由所述注册控制模块 062判断通过鉴权的用户发起， 或者由网络设备发起， 或者根据网络的部署策略由未经过鉴权的用户发起， 此时， 接入地会话控制 器中可省去注册控制模块 062， 如当用户拨打 110等紧急电话时， 无需注册。 当会话完成后， 会话控制模块对释放会话请求消息进行处理， 释放会话。 其 中， 全网归属地用户服务系统详见 IP多媒体子系统实施例中的说明。
控制器实施例二
图 2为本发明接入地会话控制器实施例二的结构示意图， 在上述实施例 的基础上，接入地会话控制器还包括路由模块 066，路由模块 066用于根据呼 叫请求消息中的用户标识， 查询全网归属地用户服务系统和相应的执行域名 服务的服务器（简称 DNS服务器）， 结合相关的路由策略， 找到下一跳消息 转发的地址信息， 如对方接入地会话控制器的地址信息、 或者 BGCF的地址 信息。 会话控制模块 064根据触发的应用服务器返回的消息释放会话、 建立 用户与应用服务器之间的会话或将呼叫请求消息路由到被叫端； 当需要将呼 叫请求消息路由到被叫端时， 会话控制模块 064根据路由模块 066找到的地 址信息， 直接将所述呼叫请求消息转发到被叫端的接入地会话控制器； 或者 在满足触发条件的情况下， 进一步将触发的应用服务器返回的消息转发给被 叫端接入地会话控制器； 避免了呼叫请求消息发送给被叫端呼叫会话控制模 块之前从主叫 P-CSCF到 S-CSCF再到被叫 S-CSCF的多次转发， 甚至避免了 从主叫 P-CSCF到 I-CSCF再到 S-CSCF再到被叫 I-CSCF再到被叫 S-CSCF 的多次转发， 大大筒化了呼叫请求消息的处理流程， 提高了呼叫请求消息的 处理效率， 缩短了会话建立时间。
上述实施例中， 会话控制模块 064还用于维护会话的状态信息。 在多个 用户发起呼叫请求消息的情况下， 会话控制模块还 >据用户的用户标识将用 户的呼叫请求消息处理过程中产生的其他消息关联起来， 使得接入地会话控 制器准确地处理各用户的呼叫请求消息。
基于上述实施例， 接入地会话控制器还包括信令压缩模块， 压缩 SIP .消 息， 能够节约网络的传输带宽。
基于上述实施例， 接入地会话控制器还包括计费模块， 用于根据呼叫请 求消息建立的会话进行计费， 如通过呼叫详细记录（CDR )进行计费。
系统实施例
图 3为本发明 IP多媒体子系统实施例的结构示意图， IP多媒体子系统 ( IMS ) 00与公共交换电话网络（PSTN ) 1、 IP多媒体子系统网络或简化 IP 多媒体子系统网络 2、遗留移动信令网络 3、终端 4及应用服务器 5通信连接， IMS 00包括： MRFP 01 , IMS-MGW 02、 MRFC 03、 MGCF 04、 BGCF 05、 接入地^舌控制器（ A-CSCF )06及全网归属地用户服务系统 07。其中， MRFC 03对 A-CSCF 0—6的信息进行解析并执行相应的操作， 如、 申请资源、 释放资 源或对资源进行修改； MGCF 04根据被叫号码和来话情况选择 A-CSCF 06， 并完成 PSTN 1 与 IMS 00之间的呼叫控制协议转换； BGCF 05 根据来自 A-CSCF 06的呼叫请求选择适当的 PSTN 1接口点或者 CS域的接口点， 从而 将呼叫路由到与 PSTN 1或者 CS域的切入点相连的网络，或者路由到其他 IMS 网络或由本发明 IMS系统组成的简化 IMS网络 2; A-CSCF 06将来自终端 4 的呼叫请求路由到相应的网元， 如确定呼叫请求满足触发条件时， 触发相应 的应用服务器 5, 将呼叫请求路由到该应用服务器 5; 并且， A-CSCF 06根据 终端 4发出的注册请求从全网归属地用户服务系统 07获取鉴权信息， 验证终 端 4的合法性， 即是否通过鉴权。 A-CSCF 06可通过上述控制器实施例中提 供的 A-CSCF来实现。 全网归属地用户服务系统 07可以采用数据和索引分离 的方式保存全网的用户信息， 如用户的认证鉴权信息、 接入的 A-CSCF信息、 业务信息等， 以及这些信息数据对应的索引， 从而能够任意扩展保存的数据 量， 满足保存全网用户信息数据的要求， 如， UT斯达康（UTSTARCOM )公 司的 MmHLR服务器、 Oracle公司的大型分布式数据库等产品都可用来组建 全网归属地用户服务系统 07。 A-CSCF与全网归属地用户服务系统使得 IP多 媒体子系统大大简化了。
由上述系统实施例组成的 IMS网络也大大简化了， 如图 4所示， 通过采 用分布式计算机技术构建一个统一的全网归属地用户服务系统 07， 使得无需 区分归属地和漫游地， 各地域的会话控制功能能够使用统一的 A-CSCF 06实 体实现。
注册方法实施例
当用户终端使用签约业务时， 用户首先需要注册获得使用权限， 即在 A-CSCF判断用户发送的呼叫请求消息是否满足触发应用服务器的条件之前 , 需要对该用户进行注册， 如图 5所示。 图 5为本发明 IP多媒体子系统对终端 进行注册的方法实施例的流程图， 图 6为与图 5相对应的信令流程图。 假设 某一终端接入用户接入网（IP CAN )后， 通过动态配置协议（DHCP )和 DNS 查询机制获取分配的 A-CSCF,然后向上述系统实施例中提供的 A-CSCF发起 注册请求消息（ Register )，该" Register"消息中包含有分配 A-CSCF的 ID信息， IMS对该终端注册具体包括：
步骤 101: A-CSCF接收到 "Register" 消息 101，后， A-CSCF直接向全网 归属地用户服务系统发送多媒体鉴权请求消息 （MAR ) 102，， 向全网归属地 用户服务系统请求和请求注册的用户终端相关的鉴权信息， 大大简化了 Register消息的处理流程。
步骤 102:全网归属地用户服务系统向 A-CSCF返回包含该用户终端鉴权 信息的多媒体鉴权响应消息（MAA ) 103，。
步糠 103: A-CSCF根据收到的用户终端的鉴权信息， 向终端发送未授权 ( 401 ) 消息 104，， 向终端发起鉴权挑战。
步骤 104: A-CSCF接收到终端重新向网络发出的" Register"消息 105，，其 中包含终端自身存储的婆权信息， 根据全网归属地用户服务系统发送的鉴权 信息判断该用户终端发送的鉴权信息是否匹配， 从而确定该用户终端是否通 过鉴权。 若该用户终端通过鉴权， 执行步骤 105; 否则， 执行步骤 108。
步骤 105: A-CSCF向全网归属地用户服务系统发送服务器分配请求消息 ( SAR ) 106，， 请求全网归属地用户服务系统存储本 A-CSCF的 ID信息， 后 续当其他 A-CSCF或本 A-CSCF接收到该用户终端作为被叫的呼叫请求消息 时， 通过查询 HSS能够根据此 ID信息找到为该用户服务的 A-CSCF, 并将呼 叫请求消息路由到 ID信息对应的 A-CSCF接续呼叫。
步骤 106:全网归属地用户服务系统向 A-CSCF返回服务器分配响应消息 ( SAA ) 107，， 接受 A-CSCF的请求， 并返回与该用户终端相关的业务数据。
步骤 107: A-CSCF向终端返回注册成功消息（200 OK ) 108，， 注册成功。 步骤 108: A-CSCF向终端发送注册失败（403 ) 消息。
本实施例通过在接入网为用户终端直接分配 A-CSCF,接收用户终端的注 册请求消息，避免了注册请求消息在 P-CSCF、 S-CSCF及 I-CSCF之间的多次 转发， 使得用户终端发出注册请求消息后能够直接由 A-CSCF向全网 HSS发 起多媒体鉴权请求， 大大筒化了注册流程， 提高了注册效率。
用户注册成功后， 便可使用签约的业务， 通过本发明实施例提供的 IMS 系统建立会话。
建立会话方法实施例一
图 7为本发明 IP多媒体子系统建立会话的方法实施例一的流程图， 图 8 为图 7对应的信令流程图。 假设某一用户终端向上述系统实施例中提供的任 一 IMS发起创建会议的请求， 由于此时的会议实施例还没有创建， 在初始呼 叫请求消息 （Invite ) 201，中使用会议工厂的通用资源标识（Ut )。 IMS建立 会话的过程包括：
步骤 201: IMS中的 A-CSCF收到" Invite"消息 201，后， 判断" Invite"消息 201，是否满足触发 AS的条件， 若是， 执行步骤 202; 否则， 执行步骤 210。
步骤 202: A-CSCF根据初始过滤准则 （ iFC )把" Invite"消息 201，触发到 ASo 由于用户终端在请求会议时， 使用的是会议工厂的 URI， 因此， AS收到 "Invite"消息 201，后开始分配会议实施例的 URI, 并将会议中可使用的会话描 述协议信息（ SDP )通过预定时通知（ 183 )消息 202，发送给 A-CSCF; 同时， 在 MRFP中创建会议的连接资源。
步骤 203: A-CSCF将" 183"消息 202，转发给用户终端， 用户终端接收到 "183"消息 202，后， 把用户选定的 SDP信息通过临时响应 （Prack ) 消息 203， 发送给 A-CSCF, 并开始申请本地资源。
步骤 204: A-CSCF将" Prack"消息 203，转发给 AS， AS响应用户终端的 "Prack"消息 203，， 向 A-CSCF发送响应消息（ 200 OK ) 204，， 可在此信息中 携带 SDP信息。
步骤 205: A-CSCF将" 200 OK"消息 204，转发给用户终端； 用户终端更新 SDP信息， 并将更新后的 SDP通过更新消息（Update ) 205，发送给 A-CSCF。
步骤 206: A-CSCF将" Update"消息 205，转发给 AS， AS向 A-CSCF发送 响应" Update"消息 205，的" 200 OK"消息 206，， 同时 MRFP打开与终端之间的 媒体连接。
步骤 207: A-CSCF将" 200 OK"消息 206，转发给用户终端。
步骤 208: A-CSCF接收 AS返回的 "Invite"消息 201，的响应消息 -" ~ "200 OK"消息 207，， 并转发给用户终端； "200 OK"消息 207，的" Contact"头中携带 会议实施例的 URI;用户终端接收到携带有会议实施例 URI的 "200 OK"消息 207，后， 向 A-CSCF发送确认" Invite"的应答消息（ACK ) 208，， 确认会议创 建成功。
步骤 209: A-CSCF将" ACK"消息 208，转发给 AS, 完成此次会话的建立。 步骤 210: A-CSCF向终端返回拒绝创建或创建失败消息。
本实施例中， 当呼叫终端使用的是预付费业务， 则 A-CSCF接收到终端 发起的 "Invite"消息后， 首先触发预付费业务的应用服务器， 根据预付费业务 应用服务器返回的消息判断该用户终端是否还有支付本次业务的能力， 若是， 则继续判断" Invite"消息是否满足触发其他应用服务器的条件， 如本实施例中 满足触发创建会议应用服务器的条件， 则继续触发该应用服务器。 若该用户 的帐户余额不足时， 应用服务器向 A-CSCF返回消息， 告知 A-CSCF该用户 帐户余额不足， A-CSCF 居该消息向终端发送消息， 拒绝建立会话。
本实施例通过 A-CSCF接收用户终端的" Invite"消息， 避免了触发 AS之 前对" Invite"消息在 P-CSCF、 S-CSCF及 I-CSCF之间的多次转发， 使得终端 发出" Invite"消息后能够直接由 A-CSCF根据" Invite"消息触发 AS, 大大筒化 了会话建立或呼叫流程， 缩短了会话建立时间， 提高了会话建立效率。
建立会话方法实施例二
图 9为本发明 IP多媒体子系统建立^舌的方法实施例二的流程图， 图 10 为与图 9相对应的信令流程图。假设某一终端 UE—1向上述系统实施例中提供 的任一 IMS发送" invite"消息 301，， 呼叫另一终端 UE— 2， UE_1申请了主叫号 码显示限制业务， UE— 2申请了主叫号码显示业务； UE— 1对应的 A-CSCF为 A-CSCF_1 , 主叫号码显示限制业务对应的应用服务器为 AS— 1; UE_2对应的 A-CSCF为 A-CSCF— 2， 主叫号码显示业务对应的应用服务器为 AS— 2; 被叫 终端 IMS建立该会话的过程包括：
步骤 301 : A-CSCF— 1接收到 "invite"消息 301，后， 判断" invite"消息 301， 是否满足触 AS的条件， 本实施例中" invite"消息 301，满足触发 AS— 1的条件。
步骤 302: A-CSCF— 1触发 AS— 1， 将" invite"消息 301，路由到 AS_1中； AS一 1 收到" invite"消息 301，后执行相关的业务控制逻辑， 如， 将" invite"消息 301，中 "Privacy"头域的值修改为" id"; 然后将修改后的" invite"消息 302，发送 给 A-CSCF—1;
步骤 303: A-CSCF— 1向全网归属地用户服务系统发送位置信息请求消息 ( LIR ) 303' , 请求查询 UE_2所在的 A-CSCF的位置或地址信息。
步骤 304: 全网归属地用户服务系统返回位置信息响应消息（LIA ) 304，， 该消息中携带 UE— 2 所在的 A-CSCF 的位置或地址信息， 本实施例中为 A-CSCF— 2。
步骤 305 : A-CSCF— 1 根据 LIA 消息 304，将" invite"消息 302，路由到 A-CSCF—2。
步驟 306: A-CSCF一 2判断" invite"消息 302，是否满足触发 AS的条件， 本 实施例中" invite"消息 302，满足触发 AS— 2的条件。
步骤 307: A-CSCF— 2将" invite"消息 302，路由到 AS— 2中； AS— 2根据 invite 消息 302， 中的" Privacy"值，得知不能显示主叫号码，，于是将 "invite"消息 302' 中的显示名称修改为 "anonymous"然后向 A-CSCF_2发出修改后的 "invite"消 息 305，。
步骤 308: A-CSCF— 2将修改后的" invite"消息 305，路由到 UE— 2;
步骤 309: A-CSCF— 2在 UE— 2与 AS_2之间根据业务需要做相应的协调 和控制， 如转发 "183"消息 306，、 "Prack"消息 307'、 "200 OK"消息 308，等, 直 至转发 "ACK"消息， 完成会话的建立。
需要说明的是， 当 UE— 1 与 UE—2 同时由一个 A-CSCF服务或在一个 A-CSCF服务的地域内时， A-CSCF— 1与 A-CSCF— 2为同一个 A-CSCF。
本实施例通过 A-CSCF接收" invite"消息， 避免了触发 AS之前对 "invite" 消息在主被叫端的 P-CSCF、 S-CSCF及 I-CSCF之间的多次转发，使得终端发 出" invite"消息后能够直接由 A-CSCF根据" invite"消息触发 AS，大大简化了会 话建立或呼叫流程， 缩短了会话建立时间， 提高了会话建立效率。
建立呼叫方法实施例三
图 11 为本发明 IP多媒体子系统建立会话的方法实施例三的流程图， 图 12为与图 11相对应的信令流程图。 以补充业务一主叫号码显示为例，假设某 一终端 UE— 1向上述系统实施例中提供的任一 IMS发送" invite"消息 301，， 呼 叫另一终端 UE_2， UE_1对应的 A-CSCF为 A-CSCF_1 , UE_2对应的 A-CSCF 为 A-CSCF— 2， 被叫终端 IMS建立该^■的过程包括：
步骤 401 : A-CSCF—1确定" invite"消息 401，不满足触发 AS的条件后， 向 全网归属地用户服务系统发送" LIR"消息 402，， 请求查询 UE_2 所在的 A-CSCF。
步骤 402: 全网归属地用户服务系统向 A-CSCF— 1 返回" LIA"消息 403，; "LIA"消息 403， 中携带 UE— 2 所在的 A-CSCF 的地址信息， 本实施例中是 A-CSCF—2。
步骤 403 : A-CSCF—1 根据全网归属地用户服务系统返回的" LIA"消息 403', 把" invite"消息 401，路由到 A-CSCF— 2。
步骤 404: A-CSCF— 2判断" invite"消息 401，是否满足触发 AS的条件， 本 实施例中， "invite"消息 401，满足触发主叫号码显示业务的应用服务器假设为 AS— 2的条件。
步骤 405: A-CSCF— 2根据 iFC把" invite"消息 401，路由到 AS— 2; AS— 2 首先判断" invite"消息 401 '是否携带" Privacy"头域， 若没有携带， 或其值不为 "id"及" user", 表明 UE—1没有使用主叫号码识别限制（CLIR )业务， 则 AS— 2 根据" invite"消息 401，中的" P- Asserted-Identity"头域， 修改" invite"消息 401，为 "invite"消息 404，， 向 UE— 2显示 UE— 1的用户号码， 并将" invite"消息 404，发 送给 A-CSCF— 2。
步骤 406: A-CSCF— 2将" invite"消息 404，路由到 UE— 2; UE_2根据" invite" 消息 404，中 AS—2修改后的主叫用户信息显示 UE— 1的用户号码，需要说明的 是， 具体显示哪个头域中的信息作为主叫号码， 视不同的网络而定， 这里不 再赘述。 然后 AS— 2并向 A-CSCF— 2发送" 183"消息 405，。
步骤 407: A-CSCF— 2将" 183"消息 405，转发给 AS— 2;
步骤 408: A-CSCF— 2在 UE— 2与 AS_2之间根据业务需要做相应的协调 和控制， 如转发 "Prack"消息、 "200 OK"消息等， 直至转发" ACK"消息， 完成 会话的建立。 这些后续的消息处理与现有的 IMS网络中的基本呼叫的流程交 互逻辑类似， 只是本实施例中， 所有的会话处理由主叫端和被叫端的 A-CSCF 完成
本实施例中， 当 UE_2为预付费业务， 且其帐户余额不足时， AS_2判断 其帐户余额不足后，向 A-CSCF— 2告知该信息， A-CSCF— 2此时拒绝建立会话， 并告知 UE_2。
当 UE_2申请有无应答前转业务时， 步骤 405 中 A-CSCF— 2把" invite"消 息 401，路由到 AS— 2之后， 如图 12、 13所示， 执行以下操作：
步骤 501: A-CSCF_2继续判断" invite"消息是否满足触发其他应用服务器 的条件， 本例中， "invite"消息中的被叫号码满足触发无应答前转应用服务器 如 AS— 3的条件， 于是 A-CSCF— 2用" invite"消息 404，触发 AS— 3, AS— 3启动 定时器， 同时返回 "invite"消息 404，；
步骤 502: A-CSCF 2将 AS— 3返回的" invite"消息 404，发送给 U£— 2; UE— 2 返回振铃消息 ( "180"消息） 501，给 AS— 3 , AS— 3 将" 180"消息 50Γ发送给 A-CSCF—2;
步骤 503: A-CSCF—2通过 A-CSCF— 1将" 180"消息 501，转发给1；£—1 1；£—1 振铃； AS_3通过定时器计时判断 UE— 2是否在预定的时间内响应； 超过预定 时间时， AS— 3向 A-CSCF— 2发送应答前转消息（ "181"消息） 502，；
步骤 504: A-CSCF— 2通过 A-CSCF— 1将 "181"消息 502，转发给 UE— 1， 通 知主叫被叫正在转移呼叫给第三方终端如 UE— 3;
步骤 505: A-CSCF_2接收 AS— 3发起的 "invite"消息 503，， 将呼叫转移到 UEJ , 处理流程与现有呼叫发起流程类似。
通过上述实施例建立会话后，在会话完成的情况下， A-CSCF还可释放会 话。 以被叫终端发起释放请求消息为例， 如图 14 15所示， 具体包括：
步骤 601 :被叫终端 UE— 2发出" bye"请求消息 601 A-CSCF一 2收到" bye" 请求消息 601，后， 判定是否满足触发应用服务器的条件， 若是， 如满足触发. AS— 2， 则将" bye"请求消息 601，发送给 AS_2 AS— 2分析收到的" bye"请求消 息 601，，执行相关的操作， 并把处理后的 "bye"请求消息 601，送回 A-CSCF_2; 否则， 执行步骤 602;
步骤 602: A-CSCF— 2将" bye"请求消息 601，路由到主叫端 A-CSCF_1; 步骤 603: A-CSCF一 1判断" bye"请求消息 601，是否满足触发条件， 并根 据判断结果进行触发；
步骤 604: A-CSCF— 1将" bye"请求消息 601，发送给主叫终端 UE— 1 ; UE_1 返回" 200 OK"消息 602，；
步骤 605: "200 OK"消息 602，经过上述类似处理方式， 返回到 UE_2， 完 成会话释放。
释放会话请求消息还可由主叫终端、主叫端 A-CSCF、应用服务器或被叫 端 A-CSCF发起， 处理流程与现有释放会话流程类似， 只是本实施例中所有 的释放会话处理由接入地会话控制器来完成。
本实施例通过 A-CSCF接收" invite"消息， 避免了转发给被叫端 CSCF之 前" invite"消息在主被叫端的 P-CSCF、 S-CSCF及 I-CSCF之间的多次转发， 也避免了触发 AS之前对 "invite，，消息在被叫端的 P-CSCF、 S-CSCF及 I-CSCF 之间的多次转发， 使得终端发出 "invite"消息后能够直接由主叫 A-CSCF路由 到被叫 A-CSCF, 并且被叫 A-CSCF根据" invite"消息触发 AS, 大大简化了会 话建立或呼叫流程， 缩短了会话建立时间， 提高了会话建立效率。
最后应说明的是： 以上实施例仅用以说明本发明的技术方案， 而非对其 限制； 尽管参照前述实施例对本发明进行了详细的说明， 本领域的普通技术 人员应当理解： 其依然可以对前述各实施例所记载的技术方案进行修改， 或 者对其中部分技术特征进行等同替换； 而这些修改或者替换， 并不使相应技 术方案的本盾脱离本发明各实施例技术方案的精神和范围。

Claims

权 利 要 求
1、 一种接入地会话控制器， 其特征在于， 包括：
消息接收模块， 用于接收来自用户的呼叫请求消息及响应消息， 或者来 自网络设备的呼叫请求消息及响应消息；
业务触发配置模块， 用于配置触发信息；
会话控制模块， 用于根据所述业务触发配置模块配置的触发信息， 确定 所述呼叫请求消息或响应消息满足触发应用服务器的条件时， 生成发送触发 相应应用服务器消息的命令， 并建立、 维护、 释放会话； 在会话建立过程中， 生成把呼叫请求消息直接发送到被叫用户所在的接入地会话控制器或者相应 的出口网关控制功能模块的命令；
消息发送模块， 用于根据所述会话控制模块的命令发送消息。
2、 根据权利要求 1所述的接入地会话控制器， 其特征在于， 所述消息接 收模块还用于接收来自用户的注册消息；
所述接入地会话控制器还包括：
注册控制模块， 用于根据所述注册消息与全网归属地用户服务系统进行 交互， 控制所述用户的注册过程。
3、根据权利要求 1或 2所述的接入地会话控制器，其特征在于，还包括： 路由模块， 用于根据所述呼叫请求消息中的用户标识， 找到下一跳消息 转发的地址信息； 所述会话控制模块还用于根据所述路由模块找到的地址信 息生成转发所述呼叫请求消息的命令； 所述消息发送模块还用于根据所述转 发呼叫请求消息的命令发送呼叫请求消息。
4、 根据权利要求 3所述的接入地会话控制器， 其特征在于， 还包括： 信令压缩模块， 用于压缩所述呼叫请求消息。
5、 根据权利要求 3所述的接入地会话控制器， 其特征在于， 还包括： 计费模块， 用于对根据所述呼叫请求消息建立的会话进行计费。
6、 一种 IP多媒体子系统， 其特征在于， 包括权利要求 1-5中任一项所述 接入地会话控制器， 还包括：
全网归属地用户服务系统， 与所述接入地会话控制器相连接， 用于存储 全网的用户信息及其索引供所述接入地会话控制器进行查询。
7、根据权利要求 6所述的 IP多媒体子系统， 其特征在于， 所述全网归属 地用户服务系统包括：
第一存储模块， 用于存储全网的用户信息索引；
第二存储模块， 用于存储与所述用户信息索引相对应的全网的用户信息。
8、一种在 IP多媒体子系统中建立会话的方法，其特征在于，该方法包括： IP多媒体子系统中的接入地会话控制器接收呼叫请求消息；
所述接入地会话控制器根据配置的触发信息， 确定所述呼叫请求消息满 足触发应用服务器的条件时， 触发相应的应用服务器；
所述接入地会话控制器根据所述相应的应用服务器返回的消息建立或者 释放会话。
9、 根据权利要求 8所述的方法， 其特征在于， 所述接入地会话控制器根 据配置的触发信息， 确定所述呼叫请求消息满足触发应用服务器的条件之前， 还包括： 对发送所述呼叫请求消息的用户终端进行注册。
10、 根据权利要求 9所述的方法， 其特征在于， 对发送所述呼叫请求消 息的用户终端进行注册包括：
所述接入地会话控制器接收到终端发送的注册请求消息后， 向全网归属 地用户服务系统发送多媒体鉴权请求消息；
所述全网归属地用户服务系统向所述接入地会话控制器返回发送所述注 册请求消息的用户的鉴权条件；
所述接入地会话控制器从所述用户终端获取用户的鉴权信息； 确定所述 鉴权信息满足所述鉴权条件时， 向所述全网归属地用户服务系统发送服务器 分配请求消息， 在接收到所述全网归属地用户服务系统返回的服务器分配响 应消息以及所述用户的相关数据后， 向所述用户返回注册成功消息； 确定所 述鉴权信息不满足所述鉴权条件时, 向所述用户发送注册失败消息。
11、 根据权利要求 8 所迷的方法， 其特征在于， 所述接入地会话控制器 根据所述相应的应用服务器返回的消息建立会话包括：
所述接入地会话控制器根据所述相应的应用服务器返回的消息向所述用 户终端返回响应消息； 所述用户终端通过所述接入地会话控制器与所述相应 的应用服务器建立会话连接。
12、 根据权利要求 8所述的方法， 其特征在于， 所述接入地会话控制器 根据所述相应的应用服务器返回的消息建立会话包括：
所述接入地会话控制器根据所述相应的应用服务器返回的消息向所述全 网归属地用户服务系统发送位置信息请求消息；
所述全网归属地用户服务系统返回被叫用户所在的接入地会话控制器信 所述接入地会话控制器根据所述接入地会话控制器信息， 向对应的被叫 接入地会话控制器发送所述呼叫请求消息；
所述被叫接入地会话控制器根据存储的触发信息判断所述呼叫请求消息 是否满足触发应用服务器的条件， 若是， 则触发相应的被叫端的应用服务器； 否则 , 将所述呼叫请求消息路由到所述被叫用户。
13、 根据权利要求 8所述的方法， 其特征在于， 所述接入地会话控制器 根据所述相应的应用服务器返回的消息建立会话包括：
所述接入地会话控制器根据所述相应的应用服务器返回的消息， 确定所 述呼叫请求消息满足触发应用服务器的条件时， 继续触发相应的应用服务器。
14、 根据权利要求 8所述的方法， 其特征在于， 还包括：
所述接入地会话控制器才艮据配置的触发信息确定所述呼叫请求消息不满 足触发应用服务器的条件后， 向全网归属地用户服务系统发送位置信息请求 消息；
所述全网归属地用户服务系统返回被叫用户所在的接入地会话控制器信
'&，
所述接入地会话控制器根据所述接入地会话控制器信息， 向对应的被叫 接入地会话控制器转发所述呼叫请求消息；
所述被叫接入地会话控制器根据存储的触发信息确定所述呼叫请求消息 满足触发应用服务器的条件后， 所述被叫接入地会话控制器触发相应的被叫 端的应用服务器， 根据所述被叫端的应用服务器返回的消息建立会话。
15、 根据权利要求 14所述的方法， 其特征在于， 所述被叫接入地会话控 制器触发相应的被叫端的应用服务器具体为： 所述被叫接入地会话控制器顺 序触发所述呼叫请求消息能够触发的所有应用服务器。
16、 根据权利要求 8至 15中任一项所述的方法， 其特征在于， 所述建立 会话后还包括： 所述接入地会话控制器释放会话。
17、 一种在 IP多媒体子系统中对终端进行注册的方法， 其特征在于， 包 括：
IP 多媒体子系统中的接入地^舌控制器接收到用户终端发送的注册请求 消息后， 向全网归属地用户服务系统发送多媒体鉴权请求消息；
所述全网归属地用户服务系统向所述接入地会话控制器返回发送所述注 册请求消息的用户的鉴权条件；
所述接入地会话控制器从所述用户终端获取用户的鉴权信息； 确定所述 鉴权信息满足所述鉴权条件时， 向所述全网归属地用户服务系统发送服务器 分配请求消息， 在接收到所述全网归属地用户服务系统返回的服务器分配响 应消息以及所述用户的相关数据后， 向所述用户返回注册成功消息； 确定所 述鉴权信息不满足所述; I·权条件时， 向所述用户发送注册失败消息。
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CN101971592A (zh) 2011-02-09
RU2449488C2 (ru) 2012-04-27
JP4981971B2 (ja) 2012-07-25
US20120179827A1 (en) 2012-07-12
EP2192742A1 (en) 2010-06-02
JP2010536279A (ja) 2010-11-25
EP2192742B1 (en) 2017-05-03
EP2192742A4 (en) 2015-04-01
KR101110990B1 (ko) 2012-02-17
KR20100037167A (ko) 2010-04-08
US8918518B2 (en) 2014-12-23
RU2010107184A (ru) 2011-09-10
BRPI0817468A2 (pt) 2015-03-24
BRPI0817468B1 (pt) 2021-01-19
CN101971592B (zh) 2013-04-03

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