CN101132644B - Urgent call implementing method and system for IP multimedia subsystem centralized control business - Google Patents
Urgent call implementing method and system for IP multimedia subsystem centralized control business Download PDFInfo
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- CN101132644B CN101132644B CN200710152093XA CN200710152093A CN101132644B CN 101132644 B CN101132644 B CN 101132644B CN 200710152093X A CN200710152093X A CN 200710152093XA CN 200710152093 A CN200710152093 A CN 200710152093A CN 101132644 B CN101132644 B CN 101132644B
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Abstract
This invention relates to a method and a system for controlling service urgent call in concentration of IP multimedia subsystem, when a user device starts up an urgent call, the method includes the following steps: after VMSC receives a CS request message sent by said user device, if said message is an urgent call, then it transfers it to E-ICCF via MGCF, which sets up a load control route for it and sends an urgent call set-up request message to the E-CSCF to use the control route to transmit a rsponse message to the user device and finishes setting up the load route, which can provide IMS urgent call service to ICS users.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of IP (Internet Protocol, network interconnection agreement) IP multimedia subsystem, IMS centralized control business emergency call implementation method and system.
Background technology
IP Multimedia System (IP Multimedia Core Network Subsystem, be called for short IMS) be by third generation partner program (3rd Generation Partnership Project, abbreviation 3GPP) a kind of IP-based network framework that proposes, it has made up an opening and service environment flexibly, support multimedia application, and provide abundant multimedia service for the user.
IMS is based on the communication network framework of IP, irrelevant with access technology, except being GPRS (General Packet Radio Service, GPRS), WLAN (Wireless LocalArea Network, WLAN (wireless local area network)) etc. packet access network provides outside the business, can also be GSM (Global System for Mobile communications, global system for mobile communications), UMTS mobile cellular networks such as (Universal Mobile Telecommunications System, unified mobile communcations systems) provides professional.
Mobile cellular network such as GSM, UMTS adopts circuit-switched technology, is called circuit (CircuitSwitched is called for short CS) territory, can provide basic speech business for the user, and based on the supplementary service of speech business.When IMS is inserted in the CS territory, in order to make CS user can use unified IMS business interface, guarantee professional consistency and professional continuity, for the user provides consistent user experience, 3GPP SA2 working group has proposed IMS centralized traffic (IMS Centralized Service is called for short ICS).
The IMS centralized traffic has the following advantages:
(1) for access waies such as circuit domain, packet domain provide consistent business, network enabled merges;
(2) support the CS network to the evolution of IMS network;
(3) not only support to have ICS ability subscriber equipment (ICS UE), also support the existing subscriber equipment (non ICS UE) that does not possess the ICS ability.
Fig. 1 is an IMS centralized traffic application scenarios session path schematic diagram, comprising following network element:
101: subscriber equipment (User Equipment is called for short UE)
102: Visited Mobile Switching Center (Visited Mobile Switch Center is called for short VMSC)
103: home subscriber server (Home Subscriber Server is called for short HSS)
104: MGCF (Media Gateway Control Function is called for short MGCF)
105: media gateway (Media Gateway is called for short MGW)
106:IMS circuit domain control function (IMS CS Control Function is called for short ICCF)
107: CSCF (Call Session Control Function is called for short CSCF)
Wherein ICCF is arranged in home network.
Above-mentioned CSCF comprises 3 kinds: Proxy-Call Session Control Function (P-CSCF), interrogation-call session control function (I-CSCF) and service-call session control function (S-CSCF).
UE inserts IMS need set up many logical paths with ICCF: session control path, carrying control path and bearer path.
The session control path: can be carried on the CS territory, adopt unstructured supplementary service data (Unstructured Supplementary Service Data is called for short USSD), this path is through VMSC and HSS.
Carry control path: UE and adopt the CS control signaling of standard to insert VMSC, be linked into IMS by MGCF, and by the carrying control path between CSCF foundation and the ICCF.
Bearer path: UE adopts the CS control signaling of standard to be linked into IMS by VMSC and MGW, sets up bearer path, sets up medium with the remote user equipment of session and is connected.
Session control path and carrying control path are converged at ICCF, constitute the UE calling branch, and ICCF serves as the IMS user agent simultaneously, replaces subscriber equipment to insert IMS, constitutes the far-end calling branch.
In the ICS system, the ICS Client-initiated is called out all will be routed to ownership IMS network, provides professional by ownership IMS network for it.
According to the telecommunication administration regulation of various places, communication network must can provide the emergency voice calls business.When user's emergency call number, or the default emergency telephone number of storing in the use terminal equipment, or use urgent call to identify when initiating urgent call, network continues urgent call and accepts the center to the urgency communication of locality, uses call center, fire-fighting call center, medical aid department, rescue facility etc. as warning.
Fig. 2 is the realization configuration diagram of IMS emergence call service of the prior art, comprises following network element:
201: subscriber equipment (UE) is used to initiate urgent call;
202: agency-call session processing capacity (Proxy-CSCF is called for short P-CSCF) is used to receive emergency call request, and selects urgent-call session processing capacity that emergency call request is handled;
203: the position obtains function (Location Retrieval Function is called for short LRF), is used to obtain the positional information of the subscriber equipment of initiating urgent call;
204: urgent-call session processing capacity (Emergency-CSCF, be called for short E-CSCF), be used to handle the emergency call request that sends from P-CSCF, emergency call request sent to the public security response center in IMS territory or send to the public security response center of circuit domain by fixed network; In addition, E-CSCF also can obtain user position information from LRF when needed;
205: service-call session processing capacity (Serving-CSCF is called for short S-CSCF) is used to handle the calling of initiating to subscriber equipment from the public security response center;
206: public security response center (Public Safety Answering Point, be called for short PSAP) is used for urgent call that process user equipment initiates or makes a call to subscriber equipment.
In addition, the existing IMS emergence call service also relates to interconnection boundary Control function (Interconnection Border Control Function, abbreviation IBCF), query call conversation control function functional entitys (not shown in the diagram) such as (Interrogating Call Session Control Function are called for short I-CSCF).
In the IMS emergence call service, user's urgent call need be routed to the E-CSCF on visit ground, is matched by E-CSCF and LRF, and urgent call is routed directly to PSAP or is routed to PSAP by MGCF/MGW.
And in the ICS system, user's calling is handled in the IMS network of ownership, can't satisfy the requirement that urgent call is handled at access zone network, promptly can't provide IMS emergence call service for ICS user in the prior art.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the deficiencies in the prior art, provides a kind of method and system of realizing emergence call service in IMS centralized control business, for ICS user provides IMS emergence call service.
In order to address the above problem, the invention provides a kind of IP Multimedia System centralized control business emergency call implementation method, be applied to comprise in the IP Multimedia System centralized control business network of IMS circuit domain control function E-ICCF, MGCF, MGW, E-CSCF and PSAP in VMSC, IMS centralized traffic subscriber equipment and the visited network thereof, when subscriber equipment was initiated urgent call, the method includes the steps of:
A) after VMSC receives the CS call setup request message of described subscriber equipment transmission,, then it is transmitted to E-ICCF by MGCF if this CS call setup request message is urgent call;
B) E-ICCF sets up carrying control path for this urgent call, and sets up request message to E-CSCF transmission urgent call;
C) receive by E-CSCF after urgent call that PSAP sends sets up response message as E-ICCF, use above-mentioned carrying control path to send CS call setup response message, and finish the foundation of the bearer path of this urgent call to this subscriber equipment.
In addition, in described steps A) in, if the type of call of described CS call setup request message is urgent call, or the called number in this message is emergency telephone number, then this CS call setup request message is urgent call.
In addition, in described steps A) in, described VMSC is transmitted to described MGCF with described CS call setup request message according to the initial address message form of ISDN User Part; The called number of described initial address message is the E-ICCF routing number.
In addition, in described steps A) in, if the called number of described CS call setup request message is not the E-ICCF routing number, then described VMSC obtains the E-ICCF routing number according to this locality configuration.
In addition, at described step B) and C) between also comprise following steps: E-CSCF and receive after described urgent call sets up request message, select PSAP, if the PSAP in the selected IMS territory then adopts Session Initiation Protocol directly to transmit above-mentioned urgent call to it and sets up request message; If the PSAP in selected CS territory then arrives this PSAP by described MGCF with this forwards.
In addition, this method also comprises following steps:
A) described subscriber equipment adopts the USSD signaling to set up message to the emergency call session that VMSC initiates to carry emergency call information;
B) if comprise the emergence call service sign indicating number in this emergency call information, then VMSC sets up forwards to described E-ICCF according to the emergence call service sign indicating number with this emergency call session;
C) described E-ICCF receives after this emergency call session sets up message, for emergency call session control path is set up in described urgent call.
In addition, also comprise following steps after the described step c): when described E-ICCF receives after described urgent call that described PSAP sends sets up response message, E-ICCF by described emergency call session control path to described subscriber equipment transmission USSD urgent call response message.
In addition, comprise the E-ICCF routing number that described E-ICCF is described user equipment allocation in the described USSD urgent call response message.
In addition, in described steps A) also comprise following steps before:
A1) described subscriber equipment adopts the USSD signaling to send the E-ICCF address request to described VMSC, and VMSC forwards it to described E-ICCF after receiving this message;
A2) described E-ICCF is this user equipment allocation E-ICCF routing number, and this routing number is included in the response message of E-ICCF address sends to this subscriber equipment by VMSC.
In addition, after described step c), in described steps A) in, if the called number of described CS call setup request message is the E-ICCF routing number, then this CS call setup request message is urgent call.
The present invention also provides a kind of IP Multimedia System centralized control business emergency call system, comprise VMSC, IMS centralized traffic subscriber equipment, it is characterized in that this emergencycallboxsystem also comprises IMS circuit domain control function E-ICCF, MGCF, MGW, E-CSCF and the PSAP in the described subscriber equipment visited network; Wherein:
Described VMSC is used for if this CS call setup request message is urgent call, then by MGCF it being transmitted to E-ICCF behind the CS call setup request message that receives described subscriber equipment transmission;
E-ICCF is used to receive the CS call setup request message that VMSC sends, and for carrying control path is set up in this urgent call, and sets up request message to E-CSCF transmission urgent call; E-ICCF also is used for setting up response message by the urgent call that E-CSCF reception PSAP sends, and uses above-mentioned carrying control path to send CS call setup response message to this subscriber equipment, and finishes the foundation of the bearer path of this urgent call;
When the type of call of described CS call setup request message is urgent call, or the called number in this message is when being emergency telephone number or E-ICCF routing number, and this CS call setup request message is urgent call.
In addition, described VMSC also is used for described CS call setup request message is transmitted to described MGCF according to the initial address message form of ISDN User Part; The called number of described initial address message is the E-ICCF routing number; If the called number of the CS call setup request message that described subscriber equipment sends is not the E-ICCF routing number, described VMSC also is used for obtaining the E-ICCF routing number according to this locality configuration.
In addition, described VMSC also is used for after the emergency call session of carrying emergency call information that receives described subscriber equipment transmission is set up message, if comprise emergence call service sign indicating number or urgent call type information or emergency telephone number information in this emergency call information, then this emergency call session is set up forwards to described E-ICCF;
Described E-ICCF also is used for receiving after above-mentioned emergency call session sets up message, for emergency call session control path is set up in described urgent call.
In addition, when described E-ICCF receives after described urgent call that described PSAP sends sets up response message, E-ICCF also is used for sending USSD urgent call response message by described emergency call session control path to described subscriber equipment.
In addition, described VMSC also is used for after receiving the E-ICCF address request that described subscriber equipment sends, with this forwards to described E-ICCF;
Described E-ICCF also is used for after receiving above-mentioned E-ICCF address request being this user equipment allocation E-ICCF routing number, and this routing number is included in the response message of E-ICCF address sends to this subscriber equipment by VMSC.
As from the foregoing, adopt IP Multimedia System centralized control business emergency call implementation method of the present invention and system thereof, can be ICS user IMS is provided emergence call service.And if set up emergency call session control path when initiating urgent call, then between user and the PSAP except that voice call, can also transfers media content, strengthened the function of urgent call.
Description of drawings
Fig. 1 is an IMS centralized traffic application scenarios session path schematic diagram;
Fig. 2 is the realization configuration diagram of IMS emergence call service of the prior art;
Fig. 3 is the emergencycallboxsystem structural representation of a kind of IMS centralized traffic of the present invention;
Fig. 4 is the system configuration schematic diagram of ICS UE of the present invention and E-ICCF;
Fig. 5 is the method flow diagram that UE of the present invention obtains the E-ICCF routing number;
Fig. 6 is the emergency call realization method flow diagram of first embodiment of the invention IMS centralized traffic;
Fig. 7 is the emergency call realization method flow diagram of second embodiment of the invention IMS centralized traffic.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples.
Fig. 3 is the emergencycallboxsystem structural representation of a kind of IMS centralized traffic of the present invention.As shown in Figure 3, this emergencycallboxsystem comprises: UE, VMSC, E-ICCF (Emergency ICCF, urgent call ICCF), MGCF, MGW, E-CSCF and PSAP.Wherein, E-ICCF, MGCF, MGW, E-CSCF and PSAP are positioned at visited network.
As shown in Figure 4, above-mentioned UE is an IMS centralized traffic subscriber equipment, wherein comprises inside and comprises local circuit territory access adaption function module; E-ICCF is used for IMS circuit domain control function that the urgent call that UE initiates is handled, wherein comprises the remote circuitry territory and inserts adaption function module and remote subscriber proxy module.
Wherein, the adaption function module is inserted in above-mentioned local circuit territory and remote circuitry territory access adaption function module is used for transmitting the relevant business control signaling of emergence call service between UE and E-ICCF, and the remote subscriber proxy module is used for setting up and control the Client-initiated emergency call session according to the business control signaling that remote circuitry territory access adaption function module is obtained.
When described UE initiates IMS centralized control business emergency call, will set up the IMS territory of 3 paths to visited network, they are respectively:
Emergency call session control path, be carried on the CS territory, adopt the USSD signaling to send to E-ICCF through VMSC by UE, the mutual emergency call session control information of adaption function module is inserted in the remote circuitry territory that the near-end circuit domain in UE inserts among adaption function module and the E-ICCF;
Carrying control path, UE adopts the CS control signaling of standard, is linked into IMS by VMSC and MGCF, arrives E-ICCF;
Bearer path, UE is linked into IMS by VMSC and MGW, and sets up medium with the emergency PSAP of this session and be connected.
Described emergency call session control path and carrying control road constitute ICS UE urgent call branch, E-ICCF is as acting on behalf of (Back to Back User Agent back-to-back simultaneously, be called for short B2BUA) replace UE to insert the PSAP of visited network, constitute far-end urgent call branch.
Specifically, described VMSC is used for if this CS call setup request message is urgent call, then by MGCF it being transmitted to E-ICCF behind the CS call setup request message that receives described subscriber equipment transmission;
E-ICCF is used to receive the CS call setup request message that VMSC sends, and for carrying control path is set up in this urgent call, and sets up request message to E-CSCF transmission urgent call; E-ICCF also is used for setting up response message by the urgent call that E-CSCF reception PSAP sends, and uses above-mentioned carrying control path to send CS call setup response message to this subscriber equipment, and finishes the foundation of the bearer path of this urgent call;
Described VMSC also is used for described CS call setup request message is transmitted to described MGCF according to the initial address message form of ISUP (ISDN UserPart, integrated services digital network User Part) agreement; The called number of described initial address message is the E-ICCF routing number; If the called number of the CS call setup request message that described subscriber equipment sends is not the E-ICCF routing number, described VMSC also is used for obtaining the E-ICCF routing number according to this locality configuration.
Described VMSC also is used for after the emergency call session of carrying emergency call information that receives described subscriber equipment transmission is set up message, if comprise emergence call service sign indicating number (urgent call condition code) or urgent call type information or emergency telephone number information in this emergency call information, then this emergency call session is set up forwards to described E-ICCF;
Described E-ICCF also is used for receiving after above-mentioned emergency call session sets up message, for emergency call session control path is set up in described urgent call.
In addition, when described E-ICCF receives after described urgent call that described PSAP sends sets up response message, E-ICCF also is used for sending USSD urgent call response message by described emergency call session control path to described subscriber equipment.
Described VMSC also is used for after receiving the E-ICCF address request that described subscriber equipment sends, with this forwards to described E-ICCF;
Described E-ICCF also is used for after receiving above-mentioned E-ICCF address request being this user equipment allocation E-ICCF routing number, and this routing number is included in the response message of E-ICCF address sends to this subscriber equipment by VMSC.
Fig. 6 is the emergency call realization method flow diagram of first embodiment of the invention IMS centralized traffic.As shown in Figure 6, after the user initiated urgent call, this method comprised following steps:
The emergency call session that 601:UE adopts the USSD signaling to carry emergency call information to the VMSC initiation is set up message (USSD urgent call foundation), and VMSC to E-ICCF, sets up emergency call session control path with this forwards;
Above-mentioned emergency call information comprises: emergence call service sign indicating number (urgent call condition code), urgent call type information, emergency telephone number information.
Above-mentioned emergence call service sign indicating number adopts local USSD service code.
Above-mentioned urgent call type information is used to identify this session control path, and to set up the type of message be urgent call
Above-mentioned emergency call session is set up the user totem information that comprises this UE in the message.
VMSC receives after above-mentioned emergency call session sets up message, according to the emergency call information that comprises in this message, as emergence call service sign indicating number, urgent call type information, emergency telephone number information, it is forwarded to E-ICCF.
Above-mentioned emergency call information can also comprise user position information, and this information obtains by the location-based service of UE, comprises user position information and can make the public security response center know the geographical position at user place.
602: subscriber equipment is initiated CS call setup request message (SETUP message) to VMSC, comprises CS type of call and called number field in this message;
Wherein, the CS type of call can be urgent call or ordinary call;
Called number can be emergency telephone number or E-ICCF routing number.
After 603:VMSC receives above-mentioned CS call setup request message, if the CS type of call in this message is urgent call, or the called number in this message is emergency telephone number or E-ICCF routing number, then: VMSC is that the initial address message of corresponding ISDN User Part sends to MGCF with this message conversion, and the called number of this initial address message is the E-ICCF routing number;
If the CS type of call in the above-mentioned CS call setup request message is urgent call, or the called number in this message is emergency telephone number, and then VMSC determines the E-ICCF routing number according to this locality configuration.
The operation that above-mentioned VMSC is converted to corresponding initial address message with this CS call setup request message is actually the initial address message form that uses ISDN User Part and transmits the CS call setup request message, therefore hereinafter above-mentioned initial address message is called the CS call setup request message.
After 604:MGCF receives above-mentioned CS call setup request message (initial address message), convert this CS call setup request message to corresponding SIP conversation request message according to the E-ICCF routing number that wherein comprises and send to E-ICCF;
But above-mentioned steps 601 and step 602～604 executed in parallel.
605:E-ICCF receives after above-mentioned emergency call session that UE sends sets up message and CS call setup request message, set up emergency call session control path and carrying control path, and this urgent call and emergency call session control path and carrying control path are carried out related, and adopt Session Initiation Protocol to send urgent call and set up request message to E-CSCF;
It is above-mentioned that in fact related operation is carried out in urgent call and emergency call session control path and carrying control path be exactly to make E-ICCF when carrying out the subsequent treatment of this urgent call, can know the emergency call session control path and the carrying control path of this urgent call correspondence, and use this two paths to send corresponding control information.
Number or the address information that comprises described UE in the request message set up in above-mentioned urgent call.
The above-mentioned operation associated user totem information of this UE or the identification information of this urgent call of can using carries out.
606:E-CSCF selects suitable substance P SAP, if the PSAP in the selected IMS territory then uses Session Initiation Protocol directly to transmit above-mentioned urgent call to it and sets up request message; If the PSAP in selected CS territory then arrives this PSAP by MGCF with this forwards;
When E-CSCF selects PSAP, need and LRF carries out obtaining or the verified users positional information alternately, and obtain the address information of PSAP, and according to the address information of PSAP request message is set up in above-mentioned urgent call and be transmitted to selected PSAP.
607～608:PSAP receives after above-mentioned urgent call sets up request message, sends urgent call by E-CSCF to E-ICCF and sets up response message;
609～611:E-ICCF uses the above-mentioned carrying control path of this urgent call correspondence to send CS call setup response message to UE.
612:E-ICCF uses the emergency call session control path of this urgent call correspondence to send USSD urgent call response message to subscriber equipment.
After UE receives USSD urgent call response message, can use emergency call session control path between UE and E-ICCF, to transmit the session control information relevant with this urgent call, and with the PSAP transmitting media content.
But above-mentioned steps 609～611 and step 612 executed in parallel.
So far, finish the foundation in emergency call session control path and carrying control path, and begin up to step 611 from above-mentioned steps 602, under the control in described carrying control path, set up corresponding bearer path, make subscriber equipment be linked into IMS by VMSC and MGW, and set up medium with the emergency PSAP of this session and be connected, enter session status.
When discharging urgent call, need discharge emergency call session control path, carrying control path and bearer path simultaneously.
In above-mentioned steps 602, UE can be with the called number of E-ICCF routing number as the CS call setup request message, the E-ICCF routing number can be after UE succeeds in registration, after perhaps the position is upgraded successfully, or urgent call initiate before (be step 601 before), obtain by sending the E-ICCF address request by UE to VMSC.
Fig. 5 is the method flow diagram that UE of the present invention obtains the E-ICCF routing number, and this method comprises following steps:
501:UE adopts the USSD signaling to send the E-ICCF address request to VMSC, and VMSC forwards it to E-ICCF after receiving this message;
After 502:E-ICCF receives above-mentioned E-ICCF address request, be that this UE distributes the E-ICCF routing number, and this routing number is included in the response message of E-ICCF address sends to UE by VMSC.
Certainly, above-mentioned E-ICCF routing number also can be included in the USSD urgent call response message that E-ICCF sends and send to UE.After UE obtains this routing number, can use this routing number to initiate new urgent call.
In above embodiment, UE has set up emergency call session control path when initiating urgent call, by carrying out the mutual of media content between this session control path UE and the PSAP; When need not interactive media content between UE and the PSAP, also can not set up above-mentioned emergency call session control path, or only when needs carry out media content mutual, set up emergency call session control path.
Fig. 7 is the emergency call realization method flow diagram of second embodiment of the invention IMS centralized traffic.Step 701 among second embodiment～710 are identical with step 602～611 of first embodiment, and difference is that UE does not set up emergency call session control path among second embodiment.
Claims (15)
1. IP Multimedia System centralized control business emergency call implementation method, be applied to comprise in the IP Multimedia System centralized control business network of IMS circuit domain control function E-ICCF, MGCF, MGW, E-CSCF and PSAP in VMSC, IMS centralized traffic subscriber equipment and the visited network thereof, when subscriber equipment was initiated urgent call, the method includes the steps of:
A) after VMSC receives the CS call setup request message of described subscriber equipment transmission,, then it is transmitted to E-ICCF by MGCF if this CS call setup request message is urgent call;
B) E-ICCF sets up carrying control path for this urgent call, and sets up request message to E-CSCF transmission urgent call;
C) receive by E-CSCF after urgent call that PSAP sends sets up response message as E-ICCF, use above-mentioned carrying control path to send CS call setup response message, and finish the foundation of the bearer path of this urgent call to this subscriber equipment.
2. IP Multimedia System centralized control business emergency call implementation method as claimed in claim 1, it is characterized in that, in described steps A) in, if the type of call of described CS call setup request message is urgent call, or the called number in this message is emergency telephone number, and then this CS call setup request message is urgent call.
3. IP Multimedia System centralized control business emergency call implementation method as claimed in claim 2, it is characterized in that, in described steps A) in, described VMSC is transmitted to described MGCF with described CS call setup request message according to the initial address message form of ISDN User Part; The called number of described initial address message is the E-ICCF routing number.
4. IP Multimedia System centralized control business emergency call implementation method as claimed in claim 3, it is characterized in that, in described steps A) in, if the called number of described CS call setup request message is not the E-ICCF routing number, then described VMSC obtains the E-ICCF routing number according to this locality configuration.
5. IP Multimedia System centralized control business emergency call implementation method as claimed in claim 1, it is characterized in that, at described step B) and C) between also comprise following steps: E-CSCF and receive after described urgent call sets up request message, select PSAP, if the PSAP in the selected IMS territory then adopts Session Initiation Protocol directly to transmit above-mentioned urgent call to it and sets up request message; If the PSAP in selected CS territory then arrives this PSAP by described MGCF with this forwards.
6. IP Multimedia System centralized control business emergency call implementation method as claimed in claim 1 is characterized in that this method also comprises following steps:
A) described subscriber equipment adopts the USSD signaling to set up message to the emergency call session that VMSC initiates to carry emergency call information;
B) if comprise the emergence call service sign indicating number in this emergency call information, then VMSC sets up forwards to described E-ICCF according to the emergence call service sign indicating number with this emergency call session;
C) described E-ICCF receives after this emergency call session sets up message, for emergency call session control path is set up in described urgent call.
7. IP Multimedia System centralized control business emergency call implementation method as claimed in claim 6, it is characterized in that, also comprise following steps after the described step c): when described E-ICCF receives after described urgent call that described PSAP sends sets up response message, E-ICCF by described emergency call session control path to described subscriber equipment transmission USSD urgent call response message.
8. IP Multimedia System centralized control business emergency call implementation method as claimed in claim 7 is characterized in that, comprises the E-ICCF routing number that described E-ICCF is described user equipment allocation in the described USSD urgent call response message.
9. IP Multimedia System centralized control business emergency call implementation method as claimed in claim 1 is characterized in that, in described steps A) also comprise following steps before:
A1) described subscriber equipment adopts the USSD signaling to send the E-ICCF address request to described VMSC, and VMSC forwards it to described E-ICCF after receiving this message;
A2) described E-ICCF is this user equipment allocation E-ICCF routing number, and this routing number is included in the response message of E-ICCF address sends to this subscriber equipment by VMSC.
10. IP Multimedia System centralized control business emergency call implementation method as claimed in claim 6, it is characterized in that, after described step c), in described steps A) in, if the called number of described CS call setup request message is the E-ICCF routing number, then this CS call setup request message is urgent call.
11. IP Multimedia System centralized control business emergency call system, comprise VMSC, IMS centralized traffic subscriber equipment, it is characterized in that this emergencycallboxsystem also comprises IMS circuit domain control function E-ICCF, MGCF, MGW, E-CSCF and the PSAP in the described subscriber equipment visited network; Wherein:
Described VMSC is used for if this CS call setup request message is urgent call, then by MGCF it being transmitted to E-ICCF behind the CS call setup request message that receives described subscriber equipment transmission;
E-ICCF is used to receive the CS call setup request message that VMSC sends, and for carrying control path is set up in this urgent call, and sets up request message to E-CSCF transmission urgent call; E-ICCF also is used for setting up response message by the urgent call that E-CSCF reception PSAP sends, and uses above-mentioned carrying control path to send CS call setup response message to this subscriber equipment, and finishes the foundation of the bearer path of this urgent call;
When the type of call of described CS call setup request message is urgent call, or the called number in this message is when being emergency telephone number or E-ICCF routing number, and this CS call setup request message is urgent call.
12. IP Multimedia System centralized control business emergency call as claimed in claim 11 system is characterized in that, described VMSC also is used for described CS call setup request message is transmitted to described MGCF according to the initial address message form of ISDN User Part; The called number of described initial address message is the E-ICCF routing number; If the called number of the CS call setup request message that described subscriber equipment sends is not the E-ICCF routing number, described VMSC also is used for obtaining the E-ICCF routing number according to this locality configuration.
13. IP Multimedia System centralized control business emergency call as claimed in claim 11 system is characterized in that,
Described VMSC also is used for after the emergency call session of carrying emergency call information that receives described subscriber equipment transmission is set up message, if comprise emergence call service sign indicating number or urgent call type information or emergency telephone number information in this emergency call information, then this emergency call session is set up forwards to described E-ICCF;
Described E-ICCF also is used for receiving after above-mentioned emergency call session sets up message, for emergency call session control path is set up in described urgent call.
14. IP Multimedia System centralized control business emergency call as claimed in claim 13 system, it is characterized in that, when described E-ICCF receives after described urgent call that described PSAP sends sets up response message, E-ICCF also is used for sending USSD urgent call response message by described emergency call session control path to described subscriber equipment.
15. IP Multimedia System centralized control business emergency call as claimed in claim 11 system is characterized in that,
Described VMSC also is used for after receiving the E-ICCF address request that described subscriber equipment sends, with this forwards to described E-ICCF;
Described E-ICCF also is used for after receiving above-mentioned E-ICCF address request being this user equipment allocation E-ICCF routing number, and this routing number is included in the response message of E-ICCF address sends to this subscriber equipment by VMSC.
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| CN101568091B (en) * | 2008-04-24 | 2011-02-02 | 华为技术有限公司 | Method, system and equipment for providing service |
| CN101577882B (en) * | 2008-08-13 | 2012-03-28 | 中兴通讯股份有限公司 | Emergency call realization system and method for IP multimedia subsystem |
| CN101841792A (en) * | 2009-03-17 | 2010-09-22 | 华为技术有限公司 | Method and device for realizing emergency call service |
| CN102244848B (en) * | 2010-05-10 | 2015-10-21 | 中兴通讯股份有限公司 | The implementation method of emergency short message and system |
| WO2011147329A1 (en) * | 2010-05-28 | 2011-12-01 | 中兴通讯股份有限公司 | Method and system for distributing public safety answer points to emergency session |
| CN111385784B (en) * | 2018-12-28 | 2021-08-27 | 展讯通信（上海）有限公司 | Communication establishment method and device for emergency call, network equipment and terminal |
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| CN1243645A (en) * | 1997-01-14 | 2000-02-02 | 艾利森公司 | Establishing emergency calls within mobile telecommunications network |
| CN1674613A (en) * | 2004-03-26 | 2005-09-28 | 朗迅科技公司 | Method for routing an emergency call |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1243645A (en) * | 1997-01-14 | 2000-02-02 | 艾利森公司 | Establishing emergency calls within mobile telecommunications network |
| CN1674613A (en) * | 2004-03-26 | 2005-09-28 | 朗迅科技公司 | Method for routing an emergency call |
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