CN101448232B - Method for realizing emergency call, and system and user equipment thereof - Google Patents
Method for realizing emergency call, and system and user equipment thereof Download PDFInfo
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- CN101448232B CN101448232B CN200810094446XA CN200810094446A CN101448232B CN 101448232 B CN101448232 B CN 101448232B CN 200810094446X A CN200810094446X A CN 200810094446XA CN 200810094446 A CN200810094446 A CN 200810094446A CN 101448232 B CN101448232 B CN 101448232B
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Abstract
The invention discloses a method for realizing an emergency call. The method comprises the steps as follows: user equipment uses a visited network IP address to initiate an emergency call request; the emergency call request is transferred to a public data network gateway of the visited network; the public data network gateway triggers the process for discovering a proxy-call session control function (P-CSCF) at the visited network; and the discovered P-CSCF processes the emergency call request. In addition, the invention also discloses a system for realizing the emergency call and the user equipment thereof. The technical proposal can realize the emergency call processing within a short time, and the invention does not require arranging an interface and is easy for realizing.
Description
Technical field
The present invention relates to the communications field, particularly, relate to the emergency call realization method and system, and a kind of subscriber equipment.
Background technology
IP Multimedia System (IP Multimedia Subsystem, referred to as IMS) be third generation partnership (3rd Generation Partnership Project, referred to as 3GPP) standard of next generation network of definition, its distinguishing feature is to have adopted Session initiation Protocol (Session Initiation Protocol, referred to as SIP) system, in the SIP system, communication is irrelevant with access, and can possess (for example separating of media service control function and bearing capacity, calling separates with session, application separates with service, business and network detach), and the multi abilities such as mobile network and internet integrated services, the trend of communication network fusion development has been complied with in the proposition of IMS.
In the IMS system, the major function entity comprises: call conversation control entity (the Call Session Control Function that the functions such as user's registration management, session control are provided, referred to as CSCF), the home subscriber server (Home Subscriber Server is referred to as HSS) of centralized management user contracting data function is provided.
In existing IMS network, the user can initiate emergence call service.Fig. 1 is the structural representation that present emergence call service is initiated, and when the user was in certain dangerous situation or need the local EC of contact, the user can initiate emergence call service by the emergency call number.as shown in Figure 1, the network element that participates in emergence call service has: user terminal (User Equipment, referred to as UE) 101, agent call conversation control entity (Proxy Call Session Control Function, referred to as P-CSCF) 102, emergency call session controlled entity (Emergency Call Session Control Function, referred to as E-CSCF) 103, it is the conversation control entity of special disposal emergence call service, and be responsible for the urgent call of receiving is forwarded to suitable public safety answering center, service call conversation control entity (Serving Call Session Control Function, referred to as S-CSCF) 104, public safety answering center (Public Safety Answering Point, referred to as PSAP) 105, be responsible for replying emergence call service.
When UE need to initiate an emergence call service, can select first to initiate the registration of urgent call as required, perhaps also can select not initiate this registration.After Emmergency log-on is completed (perhaps, when not needing Emmergency log-on), UE sends to P-CSCF into its service with the request of urgent call; When P-CSCF judges that this calling is a urgent call, request is sent to the E-CSCF that is positioned at consolidated network; E-CSCF is again according to the customer position information that carries in request, perhaps, the positional information of the UE that obtains from local registration function (Local Register Function is referred to as LRF), request is forwarded to suitable PSAP, is responsible for replying the request of urgent call by PSAP.
In correlation technique, when the user is in roaming state, can use this locality to produce technology, namely, the user can have respectively the IP address of being distributed by ownership place operator simultaneously, that is, ownership place IP (Home IP is referred to as H-IP), and the IP address of being distributed by visited place operator, that is, visited place IP (Visited IP is referred to as V-IP).Fig. 2 is that in correlation technique, the user has the configuration diagram that technology is produced in two IP address and network support this locality, relate generally to following network element and equipment: UE 201, gateway (Serving Gateway, referred to as SGW) 202, visit territory public data network gateway (Visited PDN Gateway, referred to as V-PGW) 203, visit territory emergency call session controlled entity (Emergency CallSession Control Function (Visited), referred to as E-CSCF (V)) 205, visit public safety answering center, territory (Public Safety Answering Point (Visited), referred to as PSAP (V)) 206, home domain public data network gateway (Home PDNGateway, referred to as H-PGW) 207, Proxy Call Session Control Function (Proxy CallSession Control Function, referred to as P-CSCF) 208, home domain emergency call session controlled entity (Emergency Call Session Control Function (Home), referred to as E-CSCF (H)) 209, home domain public safety answering center (Public SafetyAnswering Point (Home), referred to as PSAP (H)) 210, service call conversation control function (Serving Call Session Control Function, referred to as S-CSCF) 211.
Under above-mentioned framework, the signaling that the user sends is used H-IP, and is sent to home network by H-PGW, by the S-CSCF processing of home network; The media information that the user sends directly mails to the V-PGW of visited place by V-IP, and needn't travel back across home network again, has saved so a large amount of Internet resources.
When the user is in roaming state and has this locality when producing under this network architecture of function, (that is, at framework as shown in Figure 2), network also will have the ability of processing urgent call.At present, under this framework, the Client-initiated urgent call can be processed in the following manner: when the user initiates urgent call, because signaling plane uses H-IP, UE can mail to SGW by H-IP with the request of urgent call, after SGW receives request, the request of urgent call is sent to H-PGW, and H-PGW is dealt into request the P-CSCF of home network again.Because P-CSCF can only issue the E-CSCF that is in consolidated network with the request of urgent call in the ordinary course of things, so, if the negotiation that not about urgent call roam between visited network and user attaching network this moment, P-CSCF can refuse this emergency call request, Reason For Denial is that P-CSCF and UE be not at consolidated network, P-CSCF can't provide emergence call service for it, and requires the user to use the visited place connection again to initiate urgent call.
In correlation technique, there is the negotiation about the urgent call roaming between visited network and user's home network, and in the situation that network architecture support this locality of this moment is produced, the flow process that the user initiates urgent call at visited network as shown in Figure 3, concrete steps comprise:
S302, user initiate an emergence call service;
S304, user find the positional information of oneself, or find the positional information of oneself from the IP link;
S306, user initiate the registration of urgent call as required, are sent to be the P-CSCF of its service; At ownership place the time, can not carry out the registration of urgent call as the user, when the user roams into visited network, before initiating urgent call, carry out the registration of urgent call;
S308, after the registration of urgent call was completed, the user was dealt into urgent call the P-CSCF (H) of home network, and with sign, illustrated that this calling is a urgent call;
S308a, positional information according to the user, P-CSCF (H) upward (requires between P-CSCF (H) and E-CSCF (V), interface is arranged at this moment with the E-CSCF (V) that urgent call is forwarded to the visited place, and relevant agreement is arranged) between two networks, if this step has realized, above-mentioned request can directly forward the PSAP (V) of visited network to, that is, and and direct execution in step S312.
S308b, if P-CSCF (H) can not directly send to emergency call request the E-CSCF of visited network, P-CSCF (H) can only be forwarded to this emergency call request on the E-CSCF (H) that is positioned at consolidated network;
S310, E-CSCF (H) is according to the positional information of user in request, perhaps, also can be by the positional information of obtaining from LRF, emergency call request is transmitted to the E-CSCF (V) upper (require between E-CSCF (H) and E-CSCF (V), interface is arranged this moment, and between two networks, relevant the agreement arranged) of the visited network at user place;
S312, E-CSCF (V) reply for it for it distributes a suitable PSAP according to user's positional information, and emergency call service is provided;
S314, at this moment, urgent call is successfully established.
Can find out from above-mentioned steps, exist following problem in correlation technique: at first, said method ageing low, for the urgent call of initiating at visited network, after need to being forwarded to user's home network, the interface that relies on again urgent call between home network and visited network to forward is forwarded back to visited network with urgent call, does not have very high ageing.Secondly, want between visited network and home network to forward emergence call service, need to process between two networks of configuration the interface of urgent call, if there is no such interface between network, the forwarding of urgent call can not be successful.And according to the deployment of existing network, arranging of this interface is very difficult, and requires height very, easily makes network design more complicated.
Summary of the invention
Consider that long and mode by deployment interface of processing time of the urgent call of initiating at visited network for subscriber equipment that exists in correlation technique realizes existing larger hard problem to propose the present invention.For this reason, the present invention is intended to carry a kind of emergent call processing method of arch, urgent call treatment system, subscriber equipment.
According to an aspect of the present invention, provide a kind of emergency call realization method, the subscriber equipment that is used for having home network IP address and visited network IP address is realized urgent call at visited network.
Comprise according to the emergency call realization method of the embodiment of the present invention: subscriber equipment uses visited network IP address initiation emergency call request, and emergency call request is forwarded to the public data network gateway of visited network; It is the P-CSCF discovery procedure that the public data network gateway triggers agent call conversation control entity at visited network; The P-CSCF that finds processes emergency call request.
In addition, above-mentioned processing method also comprises: home network IP address is set to for command transmitting in advance, and visited network IP address is set to for transmission medium.
Wherein, the processing in above-mentioned subscriber equipment initiation emergency call request further comprises: subscriber equipment obtains the positional information of self, and carries positional information in emergency call request.
Preferably, the P-CSCF of the above-mentioned visited network operation of processing emergency call request is specially: subscriber equipment is by the P-CSCF that the finds registration that makes a call; After time call registration was completed, subscriber equipment sent to P-CSCF with emergency call request; According to the positional information of carrying in emergency call request, P-CSCF is E-CSCF with the emergency call session controlled entity that emergency call request is forwarded to visited network; E-CSCF is according to positional information, for user equipment allocation public safety answering center is that PSAP carries out emergency call service.
According to a further aspect in the invention, provide a kind of emergency call realization system, the subscriber equipment that is used for having home network IP address and visited network IP address is realized urgent call at visited network.
Emergency call realization system according to the embodiment of the present invention is positioned at the visited network side, and comprises: subscriber equipment is used for using visited network IP address initiation emergency call request; The public data network gateway is used for receiving the emergency call request from subscriber equipment, and triggers the agent call conversation control entity discovery procedure of visited network; Agent call conversation control entity is used for the urgent call registration of completing user equipment, and processes the emergency call request that subscriber equipment sends.
Wherein, carry the positional information of subscriber equipment in above-mentioned emergency call request.
In addition, said system further comprises: the emergency call session controlled entity, be used for receiving the emergency call request from agent call conversation control entity, and according to the positional information of the subscriber equipment that carries in emergency call request, for user equipment allocation public safety answering center carrying out emergency call service.
In accordance with a further aspect of the present invention, provide a kind of subscriber equipment, had home network IP address and visited network IP address.
Comprise according to the subscriber equipment of the embodiment of the present invention: the emergency call request module is used for using visited network IP address initiation emergency call request in the situation that subscriber equipment is positioned at visited network and needs to initiate emergency call request.
By above-mentioned at least one technical scheme of the present invention, by using visited network IP address initiation emergency call request, make the user can utilize this locality to produce under roaming state and realize easily urgent call, than prior art, can realize the urgent call processing with the shorter time, and need not deployment interface, be easy to realize.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of writing, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide a further understanding of the present invention, and consists of the part of specification, is used for together with embodiments of the present invention explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structure chart according to the network element of the initiation emergence call service of correlation technique;
Fig. 2 is that the user according to correlation technique has the configuration diagram that technology is produced in two IP address and network support this locality;
Fig. 3 initiates the flow chart of urgent call at visited network according to the user of correlation technique;
Fig. 4 is the flow chart according to the emergency call realization method of the embodiment of the present invention;
Fig. 5 is the detailed process chart of emergency call realization method shown in Figure 4;
Fig. 6 is the structural representation according to the emergency call realization system of the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, is not intended to limit the present invention.
The embodiment of the present invention provides a kind of local scheme of processing urgent call that produces of utilizing in IP Multimedia System, make the user can use this locality to produce technology under roaming state and use smoothly emergence call service.Particularly, the embodiment of the present invention provides emergency call realization method, emergency call realization system, subscriber equipment.
Embodiment of the method
According to the embodiment of the present invention, at first a kind of emergency call realization method is provided, in the method, UE has the IP address (home network IP address) of ownership place distribution and the IP address (visited network IP address) that the visited place is distributed simultaneously, wherein, home network IP address is used for command transmitting, and visited network IP address is used for transfer medium, thereby realize that media can directly forward in the visited place when the user sends request in the visited place.Fig. 4 shows the flow chart of the method, as shown in Figure 4, comprises following processing:
Step S402, UE use visited network IP address initiation emergency call request, and emergency call request is forwarded to the public data network gateway (PGW) of visited network;
Step S404, PGW triggers agent call conversation control entity (P-CSCF) discovery procedure at visited network;
Step S404, the P-CSCF of the visited network of discovery processes emergency call request.
Wherein, in step S402, when the user initiated an emergency call request business, UE can according to emergency telephone number or urgent call characteristic, judge that this is called out is emergence call service; Further, when UE judges this calling for urgent call, do not adopt the IP address, ownership networking of acquiescence to send call request, but as mentioned above, adopt visited network IP address transmission call request.Adopt the IP address of visited network due to call request, so the call request meeting directly is forwarded to the PGW of visited network, like this, improved network processes speed.
In addition, UE can also find the positional information of oneself, perhaps finds the positional information of oneself from the IP link, and carries this positional information of discovery in emergency call request.
In step S404, after triggering the P-CSCF discovery procedure, made a P-CSCF can process this emergency call request.
Operation in step S406 can specifically describe as follows: by the P-CSCF that the finds registration that makes a call; After time call registration is completed, emergency call request is sent to P-CSCF; According to the positional information of carrying in emergency call request, P-CSCF is forwarded to emergency call request the E-CSCF of visited network; E-CSCF carries out emergency call service according to positional information for UE distributes public PSAP.
By the detailed process chart shown in Fig. 5, the present invention may be better understood.As shown in Figure 5, the detailed implementation procedure of the emergency call realization method of the embodiment of the present invention is as follows:
When S502, UE prepare to initiate an emergence call service, when finding that UE is in visited network, and when having two IP, be an emergency call request if judge this, the IP address of transmission medium of being used for the visited place distribution sends this emergency call request;
S504, UE can find the positional information of oneself, or finds the positional information of oneself from the IP link, and this positional information is carried in emergency call request;
S506, due to the IP address transmission emergency call request of using the visited place, therefore should request can be forwarded on the V-PGW that is positioned at visited network, and initiate the discovery procedure of a visited place P-CSCF on V-PGW, and initiate the registration of urgent call by the P-CSCS of visited place;
S508 after the registration of urgent call is completed, is dealt into emergency call request the P-CSCF (V) of visited network, and carry the expression this calling be the sign of a urgent call;
S510, according to user's positional information, P-CSCF (V) is forwarded to urgent call the E-CSCF (V) of visited place;
S512, E-CSCF (V) reply for it for it distributes a suitable PSAP according to user's positional information, and emergency call service is provided;
S514, at this moment, urgent call is successfully established.
Can find out by above description, the emergency call realization method by the embodiment of the present invention provides can successfully realize urgent call so that be positioned at the user of visited network, and not need additional interface, because can not increase the complexity of network design.
System embodiment
According to the embodiment of the present invention, a kind of emergency call realization system is provided, this system is positioned at the visited network side, is used for having the UE of home network IP address and visited network IP address, that is and, the UE with two IP realizes urgent call at visited network.
Fig. 6 is the schematic diagram that the structure of this system is shown, and as shown in Figure 6, comprising:
Subscriber equipment (UE) 10, be used for using visited network IP address initiation emergency call request, preferably, carry the positional information of UE 10 in this emergency call request, UE can find the positional information of oneself, perhaps finds the positional information of oneself from the IP link;
Public data network gateway (PGW) 20 is used for receiving the emergency call request from UE, and triggers P-CSCF 30 discovery procedures of visited network;
Agent call conversation control entity (P-CSCF) 30 is used for completing the urgent call registration of UE, and processes the emergency call request that UE sends.
Preferably, as shown in Figure 6, this system further comprises: emergency call session controlled entity (E-CSCF) 40, be used for receiving the emergency call request from P-CSCF 30, and according to the positional information of the UE 10 that carries in emergency call request, for distributing PSAP, UE 10 carries out emergency call service.
Apparatus embodiments
According to the embodiment of the present invention, a kind of subscriber equipment also is provided, this equipment has home network IP address and visited network IP address, namely, has two IP address, comprise an emergency call request module, this emergency call request module is used for initiating emergency call request in the situation that subscriber equipment is positioned at visited network and needs, and uses above-mentioned visited network IP address initiation emergency call request.
This emergency call request will be forwarded to the PGW of visited network, rather than be forwarded to home network, improve network processes efficient, make the user of roaming can realize easily urgent call, improve user's experience.
As mentioned above, by means of above-mentioned at least one technical scheme of the present invention, can utilize this locality to produce the processing urgent call in IP Multimedia System, make the user to use this locality to produce technology under roaming state and use smoothly emergence call service, than prior art, realized urgent call in the situation that do not increase the network design complexity with higher network processes speed.
The above is only the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. emergency call realization method, the subscriber equipment that is used for having home network IP address and visited network IP location is realized urgent call at visited network, it is characterized in that, described method comprises:
Described subscriber equipment uses described visited network IP address initiation emergency call request, and described emergency call request is forwarded to the public data network gateway of visited network;
It is the P-CSCF discovery procedure that described public data network gateway triggers agent call conversation control entity at described visited network;
The described P-CSCF that finds processes described emergency call request.
2. method according to claim 1, is characterized in that, also comprises:
Described home network IP address is set to for command transmitting in advance, and described visited network IP address is set to for transmission medium.
3. method according to claim 1 and 2, is characterized in that, the processing of initiating emergency call request at described subscriber equipment further comprises:
Described subscriber equipment obtains the positional information of self, and carries described positional information in described emergency call request.
4. method according to claim 3, is characterized in that, the operation that the P-CSCF of described visited network processes described emergency call request is specially:
Described subscriber equipment is by the described P-CSCF that the finds registration that makes a call;
After time call registration was completed, described subscriber equipment sent to described P-CSCF with described emergency call request;
According to the described positional information of carrying in described emergency call request, described P-CSCF is E-CSCF with the emergency call session controlled entity that described emergency call request is forwarded to described visited network;
Described E-CSCF is according to described positional information, for described user equipment allocation public safety answering center is that PSAP carries out emergency call service.
5. emergency call realization system, the subscriber equipment that is used for having home network IP address and visited network IP address is realized urgent call at visited network, it is characterized in that, described system is positioned at the visited network side, and comprises:
Subscriber equipment is used for using described visited network IP address initiation emergency call request;
The public data network gateway is used for receiving the emergency call request from described subscriber equipment, and triggers the agent call conversation control entity discovery procedure of visited network;
Agent call conversation control entity is used for the urgent call registration of completing user equipment, and processes the emergency call request that subscriber equipment sends.
6. system according to claim 5, is characterized in that, carries the positional information of described subscriber equipment in described emergency call request.
7. system according to claim 6, is characterized in that, further comprises:
The emergency call session controlled entity, be used for receiving the described emergency call request from described agent call conversation control entity, and according to the positional information of the subscriber equipment that carries in described emergency call request, for described user equipment allocation public safety answering center carrying out emergency call service.
8. subscriber equipment has home network IP address and visited network IP address, it is characterized in that, comprising:
The emergency call request module is used for initiating emergency call request in the situation that described subscriber equipment is positioned at visited network and needs, and uses described visited network IP address initiation emergency call request;
Wherein, use described visited network IP address initiation emergency call request to comprise:
Obtain the positional information of described subscriber equipment self, and carry described positional information in described emergency call request.
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| CN200810094446XA CN101448232B (en) | 2008-04-30 | 2008-04-30 | Method for realizing emergency call, and system and user equipment thereof |
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| CN200810094446XA CN101448232B (en) | 2008-04-30 | 2008-04-30 | Method for realizing emergency call, and system and user equipment thereof |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP2421286A4 (en) * | 2009-04-17 | 2016-10-12 | Nec Corp | Mobile communication system, base station, gateway apparatus, core network apparatus, communication method |
| CN102036204B (en) * | 2009-09-24 | 2015-06-03 | 中兴通讯股份有限公司 | Method and system for realizing emergency location |
| CN102065068A (en) * | 2009-11-18 | 2011-05-18 | ***通信集团公司 | Implementation method, system and equipment for emergency call |
| CN102348281A (en) * | 2010-08-02 | 2012-02-08 | 中兴通讯股份有限公司 | Method, system and equipment for acquiring cell location of terminal |
| CN103348709A (en) * | 2010-12-17 | 2013-10-09 | 瑞典爱立信有限公司 | Method in a UE, a network node and a client node in a wireless communications network |
| CN103096243B (en) * | 2011-11-07 | 2017-10-03 | 中兴通讯股份有限公司 | Call processing method, the apparatus and system of terminal |
| CN103812757A (en) * | 2012-11-13 | 2014-05-21 | 中兴通讯股份有限公司 | Method and system for browser emergency call in real-time communication and mobile device |
| CN105578615B (en) * | 2015-12-22 | 2019-10-18 | 阳光凯讯(北京)科技有限公司 | For interconnected method and system between switching equipment under the IMS architecture of emergency communication |
| CN117560647A (en) * | 2022-08-05 | 2024-02-13 | 中国电信股份有限公司 | Call control method and device, electronic equipment and storage medium |
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