CN101325590B - Method for implementation terminal call of IP multimedia subsystem central control business - Google Patents
Method for implementation terminal call of IP multimedia subsystem central control business Download PDFInfo
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- 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
- H04L65/102—Gateways
- H04L65/1043—Gateway controllers, e.g. media gateway control protocol [MGCP] controllers
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- 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]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/12—Setup of transport tunnels
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- 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]
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Abstract
The invention discloses a method for realizing end call by IP multimedia subsystem (IMS) centralized control service. The method uses a circuit domain calling process to establish a circuit domain load bearing mode and realizes IMS centralized control business service (ICS) end call. The method includes: firstly an IMS circuit domain control function (ICCF) receives an end call request message initiated from the calling side, and then calls a terminal UE through a session control route; the UE initiates a calling process to ICCF through a circuit domain call control signaling; the ICCF returns back ringing message to the terminal UE through circuit domain, and transmits ringing to the calling side; after answering the call, the UE transmits connection message to ICCF through a session control route; the ICCF transmits session initial protocol SIP successful response message to the calling side, and simultaneously transmits back a success message response message to the UE, and then both parties of the session enter into a talking state. The invention does not require ICCF for allocating roaming numbers to establish load bearing control route, and the method is a method for effectively resolving ICS end call.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method for realizing a final call of a centralized control service of an IP multimedia subsystem.
Background
An IP (Internet Protocol, IP for short) multimedia Subsystem (IMS) is an IP-based Network architecture proposed by the third generation Partnership Project (3 GPP), which constructs an open and flexible service environment, supports multimedia applications, and provides rich multimedia services to users.
The IMS is an IP-based telecommunication Network architecture, is independent of an access technology, and can provide services for Packet access networks such as GPRS (General Packet Radio Service) and WLAN (Wireless local area Network), as well as Mobile cellular networks such as GSM (Global System for Mobile communications), UMTS (Universal Mobile Telecommunications System), and the like.
Mobile cellular networks such as GSM and UMTS use circuit-switched technology, called Circuit Switched (CS) domain, to provide basic voice services and supplementary services based on voice services for users. When the CS domain accesses the IMS, it evolves to an access mode, and the services are completely and uniformly provided by the IMS, and this technology is called IMS Centralized Service (ICS for short).
The IMS centralized service has the following advantages:
(1) the IMS provides consistent services for access modes such as a circuit domain, a packet domain and the like, and supports network convergence;
(2) the evolution of the CS network to the IMS network is supported;
(3) not only supports user equipment with ICS capability, but also supports the existing user equipment without ICS capability.
Fig. 1 is an architecture diagram of an IMS centralized control service, which includes the following network elements:
101 User Equipment UE for short
102 visiting Mobile switching Center virtual Mobile Switch Center VMSC for short
103 Home Subscriber Server, HSS for short
104 Media Gateway Control Function MGCF for short
105 Media Gateway MGW for short
106IMS circuit domain Control Function IMS CS Control Function ICCF for short
Call Session Control Function CSCF for 107 Call Session Control Function
UE _101 establishes 3 paths to ICCF _106 of the IMS domain via VMSC _ 102: a session control path, a bearer control path, and a bearer path, wherein:
a session control path, which adopts Unstructured supplementary service Data (USSD for short), and the UE _101 reaches the ICCF106 through the VMSC _102 and the HSS _ 103;
a control path is loaded, UE accesses VMSC by adopting a standard CS control signaling, accesses IMS by MGCF, and VMSC accesses MGCF _104 by an integrated digital service User Part signaling (ISDN User Part, ISUP for short) and then reaches ICCF _106 by adopting a Session initiation protocol signaling (SIP for short) CSCF _ 107;
bearer path, established through MGW _ 105.
The session control path conveys session information between UE _101 and ICCF _106, while the bearer control path conveys bearer control messages between the CS domain and the IMS domain via standard CS control signaling and SIP signaling, and finally the two control paths are associated at ICCF _ 106. This function is equivalent to the SIP user agent function for the UE to establish an IMS session. The bearer control path also controls the establishment of bearer paths and the management of bearer resources.
Figure 2 is a termination flow of a prior art scheme. The specific flow is as follows
201. CSCF receives the called request message of the calling side;
202. ICCF receives the called request message from CSCF;
203. ICCF obtains the roaming number of the called party;
204. ICCF informs UE of a called request through USSD;
205. the ICCF routes the obtained roaming number to the CSCF;
206. CSCF uses roaming number to route to MGCF;
207. MGCF sends ISUP initial address message to VMSC;
208. the VMSC initiates called establishment to the UE;
209. UE sends response message to VMSC;
210. the VMSC sends a response message to the MGCF;
211. MGCF sends back SIP success response message to CSCF;
212. CSCF returns SIP success response message to ICCF;
213. ICCF returns SIP success response message to CSCF;
214. and the CSCF returns a SIP success response message to the calling side and enters a call state.
It can be seen from the existing call terminating flow that when the terminating call establishes the terminating call bearer control path between the ICCF and the VMSC, the ICCF needs to acquire a number of a roaming number, and establish the bearer control path using the number of the roaming number and the VMSC, and how the ICCF acquires the number and the format of the number are uncertain in the existing flow.
In addition, the existing terminating procedure may require two paging processes, and the call setup time is relatively long.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method for realizing the call termination of the centralized control service of an IP multimedia subsystem, which realizes the ICS call termination by establishing a circuit domain bearing mode in the calling process of the circuit domain. The session contact is directly established between the user UE and the ICCF without the process of acquiring the roaming number.
The invention provides a method for realizing terminal call of IP multimedia subsystem centralized control service, comprising the following steps:
(1) after receiving a terminal call request message initiated by a calling side, an IP multimedia subsystem circuit domain control function ICCF calls a terminal UE through a session control path;
(2) UE initiates a calling process to ICCF through circuit domain call control signaling;
(3) ICCF sends back ringing message to terminal UE through circuit domain;
(4) ICCF sends the ring to the calling side;
(5) after answering, the UE sends a connection message to the ICCF through a session control path;
(6) the ICCF sends a session initiation protocol SIP successful response message to the calling side, and simultaneously returns a successful message response message to the UE, and the two parties of the session enter a conversation state.
Further, after receiving the terminating call request message in step (1), the ICCF establishes a session control path to the terminal UE through the home subscriber server HSS and the visited mobile switching center VMSC according to the obtained called information, and the call request message sent to the UE by the ICCF includes an ICCF address, calling information, and called information.
Further, the step (1) further comprises: and the terminal UE displays the calling number according to the received calling information.
Further, the step (2) can be further divided into:
the UE takes the ICCF address received in the step (1) as a called number, establishes a call through a bearer control path, and if the UE has intelligent calling service, the VMSC does not trigger the intelligent calling service according to the ICCF address, wherein the establishing process is as follows:
the call establishment message of the UE is sent to the VMSC, the VMSC routes the call to a media gateway control function MGCF, and the MGCF passes through a call session control function CSCF to the ICCF according to the ICCF address.
Further, the step (2) further comprises:
and after the ICCF receives the UE call, associating the session control path with the bearer control path by using the called number ICCF address of the call.
Further, the ICCF sends a ringing message to a media gateway control function MGCF through a call session control function CSCF in step (3), and the MGCF rings the message to the UE through the VMSC after being converted.
Further, in the step (4):
after receiving the call establishment request initiated by the UE in the step (2), the ICCF directly sends a ringing message to the calling side; or,
after receiving the ringing message sent by the UE through the session control path, the ICCF sends the ringing message to the calling side.
Further, in step (6):
after receiving the successful response, the media gateway at the calling side sends a confirmation request to the ICCF;
after receiving the successful response, the media gateway control function MGCF of the called side sends a confirmation request to the ICCF;
the media gateway of the calling side and the media gateway of the called side establish bearing connection, so that bearing resources of a calling user and a called user are communicated to enter a conversation state.
Because the ICCF address obtained by the UE is used as the called number, a calling process is carried out to establish the bearing control path, and the ICCF is not required to distribute roaming numbers to establish the bearing control path, the invention is an effective solution of ICS terminating call.
Drawings
Fig. 1 is a schematic diagram of a networking architecture of an IP multimedia subsystem IMS centralized control service;
fig. 2 is a terminal call flow diagram of an existing IP multimedia subsystem IMS centralized control service ICS;
FIG. 3 is a flow chart of the call termination of the ICS of the IMS centralized control service of the present invention;
fig. 4 is another call termination flow diagram of the IMS centralized control service ICS of the present invention.
Detailed Description
The technical solution of the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments.
The main innovation points of the invention are as follows: the session contact is directly established between the user UE and the ICCF without the process of acquiring the roaming number.
Fig. 3 is a flow chart of the implementation of the present invention. The method comprises the following specific steps:
301, the CSCF receives a session initiation protocol SIP session request from the calling side;
302, ICCF receives SIP session request forwarded by CSCF;
303, the ICCF determines that the called party is the UE supporting ICS through the obtained called information, allocates an ICCF address, and brings the ICCF address to the called UE through a session control path, namely USSD, through the HSS and the VMSC;
304, after receiving the called request message, the UE immediately takes the ICCF address as the called number and initiates call establishment to the VMSC;
the VMSC parses the ICCF address 305 and sends an initial address message to the MGCF. If the UE has the calling intelligent service, the VMSC does not trigger the calling intelligent service of the UE according to the ICCF address;
306, MGCF routes to CSCF according to ICCF address;
307, the CSCF routes to the ICCF according to the ICCF address;
308, after the ICCF associates the session request of the step 302 with the session request of the step 307, a ringing message is sent back to the CSCF;
309, the CSCF sends back a ringing message to the MGCF;
310, MGCF returns address full message to VMSC;
311, the VMSC sends back a ringing message to the UE;
312, the UE starts ringing and sends a ringing message to the ICCF through the session control path;
313, the ICCF notifies the CSCF of ringing;
314, the CSCF informs the calling side to ring;
315, after answering, UE sends connection message to ICCF through session control path;
316, ICCF sends SIP success response message to CSCF;
317, the CSCF sends a SIP success response message to the calling side;
318, the ICCF sends a success response message back to the UE, and the message is firstly sent to the CSCF;
319, CSCF forwards SIP success response message to MGCF;
320, MGCF returns ISUP response message to VMSC of service terminal call UE;
321, the VMSC sends a connection message to the terminal call UE;
322, the calling side sends a SIP acknowledge message to the CSCF;
323, CSCF sends SIP acknowledgement message to ICCF;
324, MGCF sends SIP affirming message to CSCF;
325, the CSCF sends a SIP acknowledge message to the ICCF, thus entering the talk state.
Another simplified flow embodiment of the present invention is shown in fig. 4, comprising the steps of:
401, the CSCF receives a Session Initiation Protocol (SIP) session request of a calling side;
402, ICCF receives SIP session request forwarded by CSCF;
403, the ICCF determines that the called party is UE supporting ICS through the obtained called information, allocates an ICCF address, and brings the ICCF address to the called UE through a session control path, namely USSD, via the HSS and the VMSC;
404, after receiving the called request message, the UE immediately takes the ICCF address as the called number and initiates call setup to the VMSC;
the VMSC parses the ICCF address 405 and sends an initial address message to the MGCF. If the UE has the calling intelligent service, the VMSC does not trigger the calling intelligent service of the UE according to the ICCF address;
406, the MGCF routes to the CSCF according to the ICCF address;
407, CSCF routes to ICCF according to ICCF address;
408, after the ICCF associates the session request of the step 402 with the session request of the step 407, a ringing message is sent back to the CSCF;
409, CSCF informs the calling side to ring;
410, CSCF sends back ringing message to MGCF;
411, MGCF returns address full message to VMSC;
412, the VMSC sends a ringing message back to the UE;
413, after answering, the UE sends a connection message to the ICCF through the session control path;
414, the ICCF sends SIP success response message to CSCF;
415, the CSCF sends a SIP success response message to the calling side;
the ICCF sends a success response message back to the UE 416, and the message is firstly sent to the CSCF;
417, CSCF forwards SIP success response message to MGCF;
418, MGCF returns ISUP response message to VMSC of service terminal call UE;
419, VMSC sends connection message to terminal UE;
420, the calling side sends a SIP acknowledgement message to the CSCF;
421, CSCF sends SIP affirming message to ICCF;
422, MGCF sends SIP affirming message to CSCF;
423, the CSCF sends a SIP acknowledge message to the ICCF and thus enters the talk state.
It can be seen from the above flow that the ICS UE terminating flow is realized by adopting the method of the present invention.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A method for realizing terminal call of IP multimedia subsystem centralized control service is characterized in that the method comprises the following steps:
(1) after receiving a terminal call request message initiated by a calling side, an ICCF (Internet protocol multimedia subsystem) of a circuit domain control function ICCF (Internet control function) of an IP multimedia subsystem allocates an ICCF address and brings the ICCF address to UE (user equipment) through a session control path to call the terminal UE;
(2) UE regards said ICCF address as the called number and initiates a calling process to ICCF through the circuit domain call control signaling;
(3) ICCF sends back ringing message to terminal UE through circuit domain;
(4) ICCF sends ringing message to calling side;
(5) after answering, the UE sends a connection message to the ICCF through a session control path;
(6) the ICCF sends a session initiation protocol SIP successful response message to the calling side, and simultaneously returns the SIP successful response message to the UE, and the two parties of the session enter a conversation state.
2. The method of claim 1, wherein in step (1), after receiving the terminating call request message, the ICCF establishes a session control path to the terminal UE through the home subscriber server HSS and the visited mobile switching center VMSC according to the acquired called information, and the call request message sent by the ICCF to the UE includes an ICCF address, calling information, and called information.
3. The method of claim 2, wherein step (1) further comprises: and the terminal UE displays the calling number according to the received calling information.
4. The method of claim 2, wherein step (2) is further divided into:
the UE takes the ICCF address received in the step (1) as a called number, establishes a call through a bearer control path, and if the UE has intelligent calling service, the VMSC does not trigger the intelligent calling service according to the ICCF address, wherein the establishing process is as follows:
the call establishment message of the UE is sent to the VMSC, the VMSC routes the call to a media gateway control function MGCF, the MGCF routes the call to a call session control function CSCF according to the ICCF address, and the CSCF routes the call to the ICCF according to the ICCF address.
5. The method of claim 2 or 4, wherein step (2) further comprises:
and (2) after the ICCF in the ICCF correlation step (1) receives a terminal call request initiated by a calling side and the UE initiated calling process to the ICCF in the step (2), a ringing message is sent back to the CSCF.
6. The method of claim 1, wherein the ICCF sends a ringing message to a Media Gateway Control Function (MGCF) through a Call Session Control Function (CSCF) in step (3), the MGCF returns an address full message to a Visited Mobile Switching Center (VMSC), and the VMSC returns a ringing message to the UE.
7. The method of claim 1, wherein in step (4):
after receiving the call establishment request initiated by the UE in the step (2), the ICCF directly sends a ringing message to the calling side; or,
after receiving the ringing message sent by the UE through the session control path, the ICCF sends the ringing message to the calling side.
8. The method of claim 1, wherein in step (6): the ICCF sends a Session Initiation Protocol (SIP) success response message to the calling side, and simultaneously sends the SIP success response message back to the UE, the method further comprises the following steps: a calling side sends an SIP confirmation message to a Call Session Control Function (CSCF), and the CSCF sends the SIP confirmation message to an ICCF; after receiving the successful response, the media gateway control function MGCF of the called side sends SIP confirmation information to the ICCF; the media gateway of the calling side and the media gateway of the called side establish bearing connection, so that bearing resources of a calling user and a called user are communicated to enter a conversation state.
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CN2007101127620A CN101325590B (en) | 2007-06-15 | 2007-06-15 | Method for implementation terminal call of IP multimedia subsystem central control business |
PCT/CN2007/003340 WO2008151481A1 (en) | 2007-06-15 | 2007-11-27 | A method for centralized controlling the service to implement the terminal call in a ip multimedia core network subsystem |
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CN101873656B (en) * | 2009-04-22 | 2012-08-08 | 华为终端有限公司 | Method, system, MSC server and conversion terminal for implementing service continuity |
CN101931900B (en) * | 2009-06-26 | 2014-03-19 | 中兴通讯股份有限公司 | Method and system for realizing services of IP multi-media subsystem network |
CN102131301B (en) * | 2010-01-14 | 2016-02-03 | 阿尔卡特朗讯公司 | A kind of method and device being non-IMS terminal and realizing the many public user identity services of IMS |
CN101969435B (en) * | 2010-09-30 | 2013-02-20 | 北京新媒传信科技有限公司 | Interaction method and system based on SIP (Session Initiation Protocol)-C protocol |
DE102015219648A1 (en) * | 2015-10-09 | 2017-04-13 | Novero Gmbh | Method, device and network for data transmission |
CN110191516B (en) * | 2019-06-17 | 2023-03-24 | 中国联合网络通信集团有限公司 | Call establishment method and system |
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CN101102613B (en) * | 2007-08-03 | 2011-04-20 | 中兴通讯股份有限公司 | An implementation method for final call in IP multimedia subsystem centrally controlled service |
CN101102615B (en) * | 2007-08-03 | 2011-06-22 | 中兴通讯股份有限公司 | An implementation method for final call in IP multimedia subsystem centrally controlled service |
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3GPP.3rd Generation Partnership Project * |
IP Multimedia System (IMS) centralized services(Release 8).《3GPP TR 23.892 V0.5.6》.2007,全文. * |
Technical Specification Group Services and System Aspects * |
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