CN102413195A - Emergency positioning method based on IP, server and system thereof - Google Patents

Emergency positioning method based on IP, server and system thereof Download PDF

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Publication number
CN102413195A
CN102413195A CN2010102938761A CN201010293876A CN102413195A CN 102413195 A CN102413195 A CN 102413195A CN 2010102938761 A CN2010102938761 A CN 2010102938761A CN 201010293876 A CN201010293876 A CN 201010293876A CN 102413195 A CN102413195 A CN 102413195A
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voip terminal
emergency
request message
address
server
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CN2010102938761A
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CN102413195B (en
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单良
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Anhui Datian St Qi Electronic Technology Co ltd
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ZTE Corp
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Priority to CN201010293876.1A priority Critical patent/CN102413195B/en
Priority to PCT/CN2011/075904 priority patent/WO2012034426A1/en
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Publication of CN102413195B publication Critical patent/CN102413195B/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/66—Arrangements for connecting between networks having differing types of switching systems, e.g. gateways

Abstract

The invention relates to an emergency positioning method based on an IP, a server and a system thereof. The method comprises the following steps that: the positioning server receives an emergency call SIP request message of a VoIP terminal, wherein the emergency call SIP request message is forwarded by a core network; a call connection between the VoIP terminal and an emergency service center is established through the core network according to the SIP request message. The positioning server of the invention can acquire position information with high precision of the VoIP terminal by combining available auxiliary data of the VoIP terminal according to emergency positioning request message transmitted by the emergency service center, and feed back the position information of the VoIP terminal to the emergency service center so as to provide an effective positioning service for the VoIP terminal. In the prior art, the positioning server can not switch an equipment address according to the network address of an interface, can not effectively acquire the terminal reality position address and can not acquire the effective position information of the terminal simply based on the global different internal network address of the terminal. By using the method, the server and the system of the invention, the above problems can be solved.

Description

IP-based urgent localization method, server and system
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of IP-based urgent localization method, server and system.
Background technology
As one of characteristic service of GSM, positioning service is considered to a bright spot of following mobile value-added service always; Positioning service is a business the most attractive in the mobile value-added service, also is each link of industrial chain one of complicated service the most simultaneously.
At present; The groundwork of OMA LOC (Open Mobile Architecture Location, Open Mobile Alliance working group) is the location technology of formulating in the mobile communications network based on user plane, with the transmission of located in connection parameter in IP tunnel in the chain of command location technology in the past mobile communications network; And then realize locating; Simultaneously also reduced dependence, reduced coupling, increased flexibility core net.
Because the user plane targeting scheme that OMA LOC group is worked out has above advantage, it is paid close attention to by a lot of relevant standardization bodies, and in the standard of its definition, quotes.Such as 3GPP, 3GPP2 and WiMAX etc.At present; SUPL (Secure User Plane Location in the formulation of OMA LOC group; The secure user plane location) in 1.0 standards and the SUPL2.0 standard, SUPL2.0 has realized the enhancing to the SUPL1.0 positioning function, has also defined urgent targeting scheme; But this urgent targeting scheme is primarily aimed at the urgent call among traditional mobile network, does not have too much to consider to support the urgent call that fixing IP mode inserts.
Organize in the ongoing SUPL 3.0 standard formulation processes at current OMA LOC, the IP network that has proposed to support the user to pass through fixed type inserts, and obtains the demand of location-based service ability.Correspondingly, in the scene of urgent call, certainly will there be the user to pass through the fixedly urgent call of IP network initiation VoIP (Voice Over IP, IP phone or IP network phone) mode, and requires to obtain the demand of emergency location service.In the present SUPL technical scheme; Externally application request is obtained on the interface of user's emergency location; Can only carry optional IP address argument; And in the new technical scheme of SUPL 3.0 planning, also just require at the SUPL location-server and support between the terminal of SUPL technology the IP address of carried terminal in the message transmitted.
But; Fixedly IP network in current complicacy inserts in the scene; The IP loaded service request data package of initiating from the terminal; In case after the network address conversion gateway device forwards, the original address of the packet that server end is received will be the address of this network address conversion gateway equipment, rather than the address at terminal itself.And; Suppose that the terminal is arranged in this fixedly IP network that is provided with network address conversion gateway equipment; Then the address at terminal itself will not be globally unique, that is to say, might have other terminal to have this address simultaneously fully in other similar network.Therefore, under above-mentioned scene, location-server or obtains the address of a network address conversion gateway equipment from interface, and, be converted to the positional information of network address translation apparatus rather than the positional information of user terminal according to this address; In SUPL message, obtain the not unique interior net address in the whole world at terminal, and can't be converted to location information of terminals according to this address.
Therefore; Existing SUPL technical scheme and relevant interface specification use fixedly at the terminal that IP network inserts, and during the urgent call of initiation VoIP mode; Can not guarantee with the IP address transition to be the active position information at terminal, also just can not for the terminal effective positioning service be provided in view of the above.
Summary of the invention
Main purpose of the present invention is to provide a kind of IP-based urgent localization method, server and system, is intended to obtain the active position information at VoIP terminal, so that effective positioning service is provided for the terminal.
The present invention proposes a kind of IP-based urgent localization method, comprising:
Location-server receives the urgent call sip request message at the VoIP terminal of core net forwarding; Said sip request message carries the IP address and the source port number of the network address translation apparatus at place, said VoIP terminal, and/or the IP address and the source port number at VoIP terminal;
According to said sip request message and set up said VoIP terminal through said core net and be connected with calling between the emergency.
Preferentially, saidly comprise according to sip request message and the calling step of connecting set up between said VoIP terminal and the emergency through said core net:
According to corresponding IP address and source port number in the said sip request message and the local urgent route data of typing, from the preset matching record sheet, obtain the routing iinformation of corresponding emergency;
Send the sip response message that carries said routing iinformation to said core net; According to said sip response message said sip request message is forwarded to the emergency of said correspondence by said core net, so that the emergency of said correspondence is called out according to said sip request message and said VoIP terminal.
Preferentially, saidly also comprise after setting up calling step of connecting between said VoIP terminal and the emergency according to sip request message and through said core net:
Receive the urgent locating request message that said emergency is sent; Said urgent locating request message carries the IP address and the source port number of the network address translation apparatus at place, VoIP terminal; And/or the IP address and the source port number at terminal, and/or the IP address and the source port number of said location-server interface network address-translating device;
Terminal positional information in the said urgent route data of said emergency return cache.
Preferentially, also comprise after the step of the urgent locating request message of said reception emergency transmission:
Send the SUPL INIT message that requires this VoIP terminal and said emergency to call out to said VoIP terminal through said core net;
Receive the SUPL POS INIT message of said VoIP terminal feedback; Said SUPL POS INIT message carries the IP address and/or the source port number at said VoIP terminal, and/or the IP address and the source port number of the network address translation apparatus at place, VoIP terminal;
Obtain said VoIP location information of terminals according to SUPL POS INIT message, and return to said emergency.
Preferentially, said urgent locating request message also carries position accuracy demand information.
The present invention also proposes a kind of IP-based urgent location-server, comprising:
The emergency call request receiver module is used to receive the urgent call sip request message at the VoIP terminal that core net transmits; Said sip request message carries the IP address and the source port number of the network address translation apparatus at place, said VoIP terminal, and/or the IP address and the source port number at VoIP terminal;
Call out to connect and to set up module, be used for according to said sip request message and set up said VoIP terminal being connected with calling between the emergency through said core net.
Preferentially, said calling connects and sets up module and comprise:
The routing iinformation acquiring unit is used for from the preset matching record sheet, obtaining the routing iinformation of corresponding emergency according to said sip request message corresponding IP address and source port number and the local urgent route data of typing;
The response message transmitting element; Be used for sending the sip response message that carries said routing iinformation to said core net; According to said sip response message said sip request message is forwarded to the emergency of said correspondence by said core net, so that the emergency of said correspondence is called out according to said sip request message and said VoIP terminal.
Preferentially, said server also comprises:
Urgent Location Request receiver module is used to receive the urgent locating request message that said emergency is sent; Said urgent locating request message carries the IP address and the source port number of the network address translation apparatus at place, VoIP terminal; And/or the IP address and the source port number at terminal, and/or the IP address and the source port number of said location-server interface network address-translating device;
The positional information feedback module is used for the terminal positional information to the said urgent route data of said emergency return cache.
Preferentially, said server also comprises:
SUPL INIT message transmission module is used for sending the SUPL INIT message that requires this VoIP terminal and said emergency to call out to said VoIP terminal through said core net;
SUPL POS INIT message sink module is used to receive the SUPLPOS INIT message of said VoIP terminal feedback; Said SUPL POS INIT message carries the IP address and/or the source port number at said VoIP terminal, and/or the IP address and the source port number of the network address translation apparatus at place, VoIP terminal;
Said positional information feedback module also is used for obtaining said VoIP location information of terminals according to SUPL POS INIT message, and returns to said emergency.
The present invention also proposes a kind of IP-based urgent navigation system, comprising: VoIP terminal, the location-server that is connected through core net with said VoIP terminal and with the emergency of said location-server wired connection, wherein:
Said VoIP terminal is used for sending the urgent call sip request message to core net, transmits said sip request message to said location-server by said core net;
Said location-server is used to receive the said sip request message that core net is transmitted; Said sip request message carries the IP address and the source port number of the network address translation apparatus at place, said VoIP terminal; And/or the IP address and the source port number at VoIP terminal, and according to said sip request message and set up said VoIP terminal through said core net and be connected with calling between the emergency;
Said emergency is used for calling out according to said sip request message and said VoIP terminal.
Preferentially, said location-server is aforesaid server.
The present invention proposes a kind of IP-based urgent localization method, server and system; The urgent call sip request message that the VoIP terminal is sent through core net is transmitted to location-server; And carry the IP address and the source port number of the network address translation apparatus at VoIP terminal place at sip request message; And/or the IP address and the source port number at VoIP terminal, so that setting up the VoIP terminal according to this sip request message, location-server is connected with calling between the emergency; Further; Location-server also can in conjunction with the auxiliary data that the VoIP terminal can be used, obtain more high-precision position information of VoIP terminal according to the urgent locating request message of emergency transmission; The VoIP location information of terminals is fed back to emergency; So that for the VoIP terminal provides effective positioning service, location-server can not effectively obtain physical location address, terminal according to the address of the network address translation apparatus on the interface in the prior art thereby solved; And can't obtain the problem of terminal active position information simply according to the not unique interior net address in the whole world at terminal.
Description of drawings
Fig. 1 a is the scene sketch map of VoIP of the present invention terminal through network address translation apparatus visit emergency;
Fig. 1 b is the scene sketch map of VoIP of the present invention terminal through the address-translating device visit emergency of across a network;
Fig. 1 c is the urgent localization method one embodiment schematic flow sheet that the present invention is based on IP;
Fig. 2 the present invention is based among urgent localization method one embodiment of IP according to sip request message and through core net to set up the schematic flow sheet that the VoIP terminal is connected with calling between the emergency;
Fig. 3 is another embodiment schematic flow sheet of urgent localization method that the present invention is based on IP;
Fig. 4 is the another embodiment schematic flow sheet of urgent localization method that the present invention is based on IP;
Fig. 5 is the urgent location-server one example structure sketch map that the present invention is based on IP;
Fig. 6 the present invention is based on to call out among urgent location-server one embodiment of IP to connect to set up the modular structure sketch map;
Fig. 7 is another example structure sketch map of urgent location-server that the present invention is based on IP;
Fig. 8 the present invention is based on the another example structure sketch map of urgent location-server of IP;
Fig. 9 the present invention is based on the urgent positioning systems of IP and unifies the example structure sketch map.
In order to make technical scheme of the present invention clearer, clear, will combine accompanying drawing to do further to detail below.
Embodiment
Embodiment of the invention solution mainly is to be transmitted to location-server through the urgent call sip request message that core net is sent the VoIP terminal; And carry the IP address and the source port number of the network address translation apparatus at VoIP terminal place at sip request message; And/or the IP address and the source port number at VoIP terminal; So that setting up the VoIP terminal according to this sip request message, location-server is connected, for the VoIP terminal provides effective positioning service with calling between the emergency.
The running environment of embodiment of the invention method realizes based on IP mode and SUPL technology; Relate to VoIP terminal, IMS core net or similar network element, location-server, emergency and corresponding network address translation apparatus etc.; The VoIP terminal can be through network address translation apparatus visit emergency, shown in Fig. 1 a; Can also be through the address-translating device visit emergency of across a network, shown in Fig. 1 b.Therefore, the business scenario that the emergence call service request that IP carries is initiated through network address translation apparatus in above-mentioned terminal can corresponding enterprise network, the service scenarios of the inter-network between also can corresponding operator.
No matter be in the deployment scenario of enterprise network; Still in the address transition service scenarios of the inter-network between operator; Network address translation apparatus all is the outside ip address according to this conversion equipment, the source port of the bag that transmits and receive data; And the IP address and the port numbers of internal network devices, form a table of comparisons come route those through the IP packet of these gateway devices.Setting up in the process of these tables of comparisons, the source port number of the bag that transmits and receive data is not Random assignment, but distributes according to certain rules, and these different port numbers can be corresponding with certain geographic range.Therefore; As long as can obtain outside ip address and source port number that the user asks the pairing network address translation apparatus of IP message of urgency traffic; And obtain simultaneously in these networks; The corresponding relation of source port number and geographic area scope then can obtain the positional information of user terminal according to this corresponding relation.
In the network architecture shown in Fig. 1 a and Fig. 1 b, the VoIP terminal is arranged in Intranet, and when it initiated IP-based urgent call through the IMS network, its call request at first was to be handled by IMS core net and similar network element.For these network elements, the destination Mobile Station International ISDN Number of VoIP terminal place Client-initiated urgent call normally is similar to 911,112, or even special number or the sign of sos etc.After the network equipment is accepted this calling, need it be routed to the appropriate emergency service centre of a respective user current location.The number unified addressing of this emergency, and unique, and be different from above-mentionedly 911,112, or even be similar to the number of the such simple identification of sos.That is to say that the network equipment need be searched the true number of an appropriate emergency service centre with indispensable mapping (enum) data according to the current position of user.
Shown in Fig. 1 c, one embodiment of the invention proposes a kind of IP-based urgent localization method, comprising:
Step S101, location-server receive the urgent call sip request message at the VoIP terminal of core net forwarding;
Above-mentioned sip request message carries the IP address and the source port number of the network address translation apparatus at place, VoIP terminal, and/or the IP address and the source port number at VoIP terminal.
In the present embodiment; When the emergency call service request need at first, be initiated through the SIP INVITE in user VoIP terminal when EC makes a call; Destination Mobile Station International ISDN Number in this urgent call sip request message possibly be 911,112, or even the special number of sos and so on; The IP message that this urgent call SIP request is carried in the access network forwarding at place, VoIP terminal is to IMS core net or similar network element; So that by IMS core net or similar network element this IP message is transmitted to location-server, the present embodiment location-server is specially the SUPL location-server.
IMS core net or similar network element; From the IP message of transmitting, take out the IP address and the source port number of address-translating device; Can also from sip request message, take out the IP address and the source port number at user VoIP terminal, be attached in the header field of sip request message and carry location-server to SUPL.According to the regulation of RFC3455, specifically can use the P-Access-Network-Info header field to carry above-mentioned information.
In the present embodiment, because the user is among the corporate intranet, its original address that is assigned with is not an overall routable IP address, therefore need carry out conversion process through a network address translation apparatus.After this network address translation apparatus has been handled the IP packet of carrying user emergency call message; For the IMS core net of accepting this packet or other similar network element, from this packet, can only obtain the IP address of this network address translation apparatus.In the present embodiment, can also from protocol informations such as UDP or TCP, SCTP, obtain the source port information of network address translation apparatus; And can from the urgent call sip request message, obtain the original ip address and the source port number at VoIP terminal.
Therefore; Location-server is from the IP message that carries VoIP terminal emergency call request sip message that IMS core net or similar network element send over; Can get access to the IP address and the source port number of the network address translation apparatus at place, VoIP terminal, and/or the IP address and the source port number at VoIP terminal.
Step S102 is according to sip request message and set up the VoIP terminal through core net and be connected with calling between the emergency.
Receive the IP message that carries the urgent call sip request message of IMS core net or the forwarding of similar network element when location-server after; From the header field of this sip request message, extract information such as above-mentioned corresponding IP address and port numbers; And the urgent route data of the local typing of judgement; Search corresponding matched record, take out the routing iinformation of emergency, return to the corresponding IMS core net or the similar network element of initiation request through SIP 302 response messages; Wherein, the routing iinformation of emergency is carried in the Contact header field of SIP 302 response messages; In above-mentioned matching process; Location-server can be according to the routing iinformation of EC; Put out the match-type that the different IP addresses section is adopted in order; Such as only coming matched record, then also need bind the IP address of network address translation apparatus and the IP address at terminal and carry out comprehensive matching through single IP address and source port number.
Afterwards, IMS core net or similar network element can be according to the routing iinformations of the emergency in the Contact header field of SIP 302 response messages, and connecting urgent is called out correct destination.
As shown in Figure 2, step S102 comprises:
Step S1021 according to corresponding IP address in the sip request message and source port number and the local urgent route data of typing, obtains the routing iinformation of corresponding emergency from the preset matching record sheet;
Step S1022; Send the sip response message that carries routing iinformation to core net; According to sip response message sip request message is forwarded to corresponding emergency by core net, so that corresponding emergency is called out according to sip request message and VoIP terminal.
Though the foregoing description only requires location-server to carry out the operation that SIP is redirected, not limiting urgent call must be carried out by the core net or the corresponding network equipment.Therefore, above-mentioned call request repeating process also can be carried out by location-server.At this moment, core net and location-server are carried out the management function of session jointly.
As shown in Figure 3, another embodiment of the present invention proposes a kind of IP-based urgent localization method, comprising:
Step S301, location-server receive the urgent call sip request message at the VoIP terminal of core net forwarding;
Above-mentioned sip request message carries the IP address and the source port number of the network address translation apparatus at place, VoIP terminal, and/or the IP address and the source port number at VoIP terminal;
Step S302 is according to sip request message and set up the VoIP terminal through core net and be connected with calling between the emergency.
Above-mentioned steps S301 and step S302 respectively with the foregoing description in step S101 and step S102 corresponding identical, repeat no more at this.
Step S303 receives the urgent locating request message that emergency is sent;
Above-mentioned urgent locating request message carries the IP address and the source port number of the network address translation apparatus at place, VoIP terminal; And/or the IP address and the source port number at terminal, and/or the IP address and the source port number of said location-server interface network address-translating device; Further, in the present embodiment urgent locating request message also portability position accuracy demand information is arranged.
Step S304, the terminal positional information in the urgent route data of emergency return cache.
Among above-mentioned steps S303 and the step S304, when accomplish between emergency and the user VoIP terminal call out is connected set up after, call center service possibly further taked suitable rescue measure according to user's current location by needs.At this moment, call center service can obtain user's current location through the corresponding query interface of SUPL location-server.Detailed process is following:
Call center service sends urgent locating request message to location-server; This urgent locating request message can carry the IP address and the source port number of the network address translation apparatus at place, VoIP terminal; And/or the IP address and the source port number at terminal, and/or the IP address and the source port number of location-server interface network address-translating device; Specifically can be network architecture scene shown in the corresponding diagram 1a; IP address and source port number that this urgent locating request message possibly carried the network address translation apparatus at place, VoIP terminal can also add the IP address and the source port number that carry the VoIP terminal; Network architecture scene shown in the corresponding diagram 1b; This urgent locating request message possibly carried the IP address and the source port number of location-server interface network address-translating device; Can also add the IP address and the source port number of the address-translating device that carries VoIP terminal place network, a back part is that IP address and the port numbers as the VoIP terminal provides; In this urgent locating request message, can also carry position accuracy demand information.
As long as emergency with the interface message of location-server on carried information such as IP address and port, just can from the SUPL location-server, get access to the current location at user VoIP terminal.The detailed process of obtaining user's current location not only comprises the processing that directly converts customer position information according to information such as IP address on the above-mentioned interface and ports into; Also possibly comprise the SULP location protocol between location-server and the VoIP terminal; The auxiliary data relevant with customer location is provided, and further obtains the process of more high-precision customer location.Wherein, the latter is seen next embodiment for details according to the process that the SULP location protocol between location-server and the VoIP terminal obtains more high-precision customer location.
Location-server is according to corresponding IP address and source port number information in the urgent Location Request of receiving; And position accuracy demand information wherein; Select the customer position information of direct return cache; Or the part relevant with customer position information in the urgent route data of the local typing of inquiry, obtain user position information.
Compare the IP address that location-server can only obtain network address translation apparatus, perhaps can only obtain the situation of user VoIP terminal address, under this kind situation; Customer location is judged as the physical address at network address translation apparatus place, or can not is positional information, and the physical location of network address translation apparatus be common and the customer location of getting along well overlaps the IP address transition; Even huge deviation is arranged, and for example, corresponding different city, area; Or even country; Even the urgent call route service this to the not high service of position accuracy demand in, can not allow equally, the present embodiment technical scheme has been avoided the defective of said circumstances.
As shown in Figure 4, further embodiment of this invention proposes a kind of IP-based urgent localization method, comprising:
Step S401, location-server receive the urgent call sip request message at the VoIP terminal of core net forwarding;
Said sip request message carries the IP address and the source port number of the network address translation apparatus at place, VoIP terminal, and/or the IP address and the source port number at VoIP terminal;
Step S402 is according to sip request message and set up the VoIP terminal through core net and be connected with calling between the emergency.
Step S403 receives the urgent locating request message that emergency is sent;
Urgent locating request message carries the IP address and the source port number of the network address translation apparatus at place, VoIP terminal, and/or the IP address and the source port number at terminal, and/or the IP address and the source port number of said location-server interface network address-translating device; In the present embodiment, urgent locating request message also portability position accuracy demand information is arranged.
Above-mentioned steps S401, step S402 and step S403 are corresponding identical with step S301, step S302 and step S303 in the foregoing description, repeat no more at this.
Step S404 sends the SUPL INIT message that requires this VoIP terminal and emergency to call out through core net to the VoIP terminal;
Step S405, the SUPL POS INIT message of reception VoIP terminal feedback;
SUPL POS INIT message carries the IP address and/or the source port number at said VoIP terminal, and/or the IP address and the source port number of the network address translation apparatus at place, VoIP terminal;
Step S406 obtains the VoIP location information of terminals according to SUPL POS INIT message, and returns to said emergency.
Among above-mentioned steps S404, step S405 and the step S406; After location-server is received urgent locating request message from EC; If judgement need be obtained more high-precision position information of user, the SUPL that then need initiate between one whole and the VoIP terminal is mutual.(following SUPL location-server is that example describes).
At first, the SUPL location-server sends the SUPLINIT message that requires user and call center service to call out with SIP Push mode through IMS core net or similar network element to the VoIP terminal of initiating urgent call.Send this message by SUPL 2.0 standard defineds through SIP Push mode, and be the mode that to support nonregistered user.Support to move and the fixed access network network because the IMS network can merge, therefore can operate to the SIP Push at the VoIP terminal that from fixing IP network, makes a call.Certainly, under the situation that operator allows and route can reach, also can select to adopt the UDP mode to send SUPL INIT message.
After SUPL INIT message is received at the VoIP terminal, at first it is met the safety certification of SUPL code requirement, the safety between foundation and the SUPL location-server connects then; SUPL POS INIT message is sent to the SUPL location-server in the terminal; The IP address information (also possibly have source port information) that wherein possibly have the VoIP terminal; The terminal also can utilize STUN similar agreements such as (Session Traversal Utilitiesfor NAT) to obtain the IP address and the source port of address-translating device of place access network, and is carried in the SUPL POS INIT message during with these information of same and sends to the SUPL location-server.
After the SUPL location-server is received the up request in VoIP terminal, can directly utilize the information such as IP address and port of terminal to report, and the IP address and the source port information of possible network address translation apparatus, position, query composition terminal; Can not have at the terminal yet can the report network address-translating device IP address and source port information the time, combination is used from the MLP interface, by IP address and the source port information that emergency is sent, position, query composition terminal.
If the VoIP terminal location precision that inquires by the way can satisfy the demand of aforementioned urgent location, the SUPL location-server can finish location sessions in advance, and customer position information is returned to emergency.Otherwise; The ability information that the SUPL location-server need report in SUPL POS INIT message according to the terminal; Judge the localization method of follow-up use, such as AGPS (Assisted GPS) etc., and according to user's current location; Calculate the auxiliary data that offer the terminal, send to the terminal through SUPLPOS message.Continue SUPL POS reciprocal process between terminal and the SUPL location-server; Until calculating position result; Thereby get access to accurate VoIP terminal positional information, the SUPL location-server fills in position result in the response message of urgent location and returns to emergency.
Therefore, compare an embodiment, in the above-described embodiments; Location-server is according to corresponding IP address and source port number information in the urgent Location Request of receiving; And position accuracy demand information wherein, select the customer position information of direct return cache, or the part relevant with customer position information in the urgent route data of the local typing of inquiry; If above-mentioned information can not satisfy the required precision of this Location Request; Can adopt the method in the present embodiment, location-server can obtain the high-precision position information at terminal through SUPL position fixing process and terminal interaction.In this process; Its own IP address and the source port number information that can combine the terminal to provide; The position that directly obtains degree of precision according to the positional information in the route data of this locality typing perhaps utilizes this information, further calculates the auxiliary data that the VoIP terminal can be used; And send to the VoIP terminal, thereby get access to more high-precision position information of VoIP terminal.
The urgent call sip request message that present embodiment sends the VoIP terminal through core net is transmitted to location-server; And carry the IP address and the source port number of the network address translation apparatus at VoIP terminal place at sip request message; And/or the IP address and the source port number at VoIP terminal, so that setting up the VoIP terminal according to this sip request message, location-server is connected with calling between the emergency; Further; Location-server also can in conjunction with the auxiliary data that the VoIP terminal can be used, obtain more high-precision position information of VoIP terminal according to the urgent locating request message of emergency transmission; The VoIP location information of terminals is fed back to emergency; So that for the VoIP terminal provides effective positioning service, location-server can not effectively obtain physical location address, terminal according to the address of the network address translation apparatus on the interface in the prior art thereby solved; And can't obtain the problem of terminal active position information simply according to the not unique interior net address in the whole world at terminal.
As shown in Figure 5, one embodiment of the invention proposes a kind of IP-based urgent location-server, comprising: emergency call request receiver module 501 and calling connect sets up module 502, wherein:
Emergency call request receiver module 501 is used to receive the urgent call sip request message at the VoIP terminal that core net transmits; Sip request message carries the IP address and the source port number of the network address translation apparatus at place, VoIP terminal, and/or the IP address and the source port number at VoIP terminal.
In the present embodiment; When the emergency call service request need at first, be initiated through the SIP INVITE in user VoIP terminal when EC makes a call; By emergency call request receiver module 501 in the location-server; Receive the urgent call sip request message that send at the VoIP terminal, the destination Mobile Station International ISDN Number in this urgent call sip request message possibly be 911,112, or even the special number of sos and so on; The IP message that this urgent call SIP request is carried in the access network forwarding at place, VoIP terminal is to IMS core net or similar network element; So that by IMS core net or similar network element this IP message is transmitted to location-server, the present embodiment location-server is specially the SUPL location-server.
IMS core net or similar network element; From the IP message of transmitting, take out the IP address and the source port number of address-translating device; Can also from sip request message, take out the IP address and the source port number at user VoIP terminal, be attached in the header field of sip request message and carry location-server to SUPL.
Call out to connect and to set up module 502, be used for according to sip request message and set up said VoIP terminal being connected with calling between the emergency through said core net.
Receive the IP message that carries the urgent call sip request message of IMS core net or the forwarding of similar network element when location-server after; Set up module 502 by the calling connection and from the header field of this sip request message, extract information such as above-mentioned corresponding IP address and port numbers; And the urgent route data of the local typing of judgement; Search corresponding matched record, take out the routing iinformation of emergency, return to the corresponding IMS core net or the similar network element of initiation request through SIP 302 response messages; Wherein, the routing iinformation of emergency is carried in the Contact header field of SIP 302 response messages; In above-mentioned matching process; Location-server can be according to the routing iinformation of EC; Put out the match-type that the different IP addresses section is adopted in order; Such as only coming matched record, then also need bind the IP address of network address translation apparatus and the IP address at terminal and carry out comprehensive matching through single IP address and source port number.
Afterwards, IMS core net or similar network element can be according to the routing iinformations of the emergency in the Contact header field of SIP 302 response messages, and connecting urgent is called out correct destination.
As shown in Figure 6, the calling connection is set up module 502 and is comprised: routing iinformation acquiring unit 5021 and response message transmitting element 5022, wherein:
Routing iinformation acquiring unit 5021 is used for from the preset matching record sheet, obtaining the routing iinformation of corresponding emergency according to sip request message corresponding IP address and source port number and the local urgent route data of typing;
Response message transmitting element 5022; Be used for sending the sip response message that carries said routing iinformation to core net; According to sip response message sip request message is forwarded to corresponding emergency by core net, so that emergency that should correspondence is called out according to sip request message and VoIP terminal.
As shown in Figure 7, another embodiment of the present invention proposes a kind of IP-based urgent location-server, comprising:
Emergency call request receiver module 701 is used to receive the urgent call sip request message at the VoIP terminal that core net transmits;
Sip request message carries the IP address and the source port number of the network address translation apparatus at place, VoIP terminal, and/or the IP address and the source port number at VoIP terminal;
Call out to connect and to set up module 702, be used for according to sip request message and set up said VoIP terminal being connected with calling between the emergency through said core net.
Urgent Location Request receiver module 703 is used to receive the urgent locating request message that emergency is sent; This urgent locating request message carries the IP address and the source port number of the network address translation apparatus at place, VoIP terminal, and/or the IP address and the source port number at terminal, and/or the IP address and the source port number of location-server interface network address-translating device;
Positional information feedback module 704 is used for the terminal positional information to the urgent route data of emergency return cache.
Above-mentioned emergency call request receiver module 701 is set up module 702 and emergency call request receiver module 501 in the foregoing description and is connected with calling that to set up module 502 functional structures corresponding identical with calling out to be connected, repeats no more at this.
In the present embodiment, when accomplish between emergency and the user VoIP terminal call out is connected set up after, call center service possibly further taked suitable rescue measure according to user's current location by needs.At this moment, call center service can obtain user's current location through the corresponding query interface of SUPL location-server.Detailed process is following:
Call center service sends urgent locating request message to location-server; Receive this urgent locating request message by urgent Location Request receiver module 703 in the location-server; This urgent locating request message can carry the IP address and the source port number of the network address translation apparatus at place, VoIP terminal; And/or the IP address and the source port number at terminal, and/or the IP address and the source port number of location-server interface network address-translating device.
Position feedback information module 704 is according to corresponding IP address and source port number information in the urgent Location Request of receiving in the location-server; And position accuracy demand information wherein; Select the customer position information of direct return cache; Or the part relevant with customer position information in the urgent route data of the local typing of inquiry, obtain user position information, and customer position information is returned to emergency.
As shown in Figure 8, further embodiment of this invention proposes a kind of IP-based urgent location-server, comprising:
Emergency call request receiver module 801 is used to receive the urgent call sip request message at the VoIP terminal that core net transmits;
Sip request message carries the IP address and the source port number of the network address translation apparatus at place, VoIP terminal, and/or the IP address and the source port number at VoIP terminal;
Call out to connect and to set up module 802, be used for according to sip request message and set up said VoIP terminal being connected with calling between the emergency through said core net.
Urgent Location Request receiver module 803 is used to receive the urgent locating request message that emergency is sent; This urgent locating request message carries the IP address and the source port number of the network address translation apparatus at place, VoIP terminal; And/or the IP address and the source port number at terminal, and/or the IP address and the source port number of said location-server interface network address-translating device;
SUPL INIT message transmission module 804 is used for sending the SUPL INIT message that requires this VoIP terminal and said emergency to call out to the VoIP terminal through core net;
SUPL POS INIT message sink module 805 is used to receive the SUPL POSINIT message of VoIP terminal feedback;
SUPL POS INIT message carries the IP address and/or the source port number at said VoIP terminal, and/or the IP address and the source port number of the network address translation apparatus at place, VoIP terminal;
Positional information feedback module 806 is used for obtaining the VoIP location information of terminals according to SUPL POS INIT message, and returns to said emergency.
The difference of present embodiment and the foregoing description is; After location-server is received urgent locating request message from EC; If judgement need be obtained more high-precision position information of user, the SUPL that then need initiate between one whole and the VoIP terminal is mutual.(following SUPL location-server is that example describes).
At first, SUPL INIT message transmission module 804 is sent the SUPL INIT message that requires user and call center service to call out with SIP Push mode through IMS core net or similar network element in the SUPL location-server to the VoIP terminal of initiating urgent call.
After SUPL INIT message is received at the VoIP terminal, at first it is met the safety certification of SUPL code requirement, the safety between foundation and the SUPL location-server connects then; SUPL POS INIT message is sent to the SUPL location-server in the terminal; The IP address information (also possibly have source port information) that wherein possibly have the VoIP terminal; The terminal also can utilize STUN similar agreements such as (Session Traversal Utilitiesfor NAT) to obtain the IP address and the source port of address-translating device of place access network, and is carried in the SUPL POS INIT message during with these information of same and sends to the SUPL location-server.
After SUPL POS INIT message sink module 805 is received the up request in VoIP terminal in the SUPL location-server; Can directly utilize the information such as IP address and port of terminal to report; And the IP address and the source port information of possible network address translation apparatus, position, query composition terminal; Can not have at the VoIP terminal yet can the report network address-translating device IP address and source port information the time, combination is used from the MLP interface, by IP address and the source port information that emergency is sent, position, query composition terminal.
If the VoIP terminal location precision that inquires by the way can satisfy the demand of aforementioned urgent location, the SUPL location-server can finish location sessions in advance, through positional information feedback module 806 customer position information is returned to emergency.Otherwise; The ability information that the SUPL location-server need report in SUPL POS INIT message according to the terminal; Judge the localization method of follow-up use, such as AGPS (Assisted GPS) etc., and according to user's current location; Calculate the auxiliary data that offer the terminal, send to the terminal through SUPL POS message.Continue SUPL POS reciprocal process between terminal and the SUPL location-server; Until calculating position result; Thereby get access to accurate VoIP terminal positional information, the SUPL location-server fills in position result in the response message of urgent location and returns to emergency.
As shown in Figure 9; One embodiment of the invention proposes a kind of IP-based urgent navigation system; Comprise: VoIP terminal 901, the location-server 902 that is connected through core net with VoIP terminal 901 and with the emergency 903 of location-server wired connection, wherein:
VoIP terminal 901 is used for sending the urgent call sip request message to core net, transmits sip request message to location-server 902 by core net;
Location-server 902 is used to receive the sip request message that core net is transmitted; Sip request message carries the IP address and the source port number of the network address translation apparatus at 901 places, VoIP terminal; And/or the IP address and the source port number at VoIP terminal 901, and according to sip request message and set up VoIP terminal 901 through core net and be connected with calling between the emergency 903;
Emergency 903 is used for calling out according to sip request message and VoIP terminal 901.
In the present embodiment, location-server 902 can be the server described in the foregoing description, specifically can be the SUPL location-server.
The above is merely the preferred embodiments of the present invention; Be not so limit claim of the present invention; Every equivalent structure or flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical field, all in like manner be included in the scope of patent protection of the present invention.

Claims (11)

1. an IP-based urgent localization method is characterized in that, comprising:
Location-server receives the urgent call sip request message at the IP network phone VoIP terminal of core net forwarding; Said sip request message carries the IP address and the source port number of the network address translation apparatus at place, said VoIP terminal, and/or the IP address and the source port number at VoIP terminal;
According to said sip request message and set up said VoIP terminal through said core net and be connected with calling between the emergency.
2. method according to claim 1 is characterized in that, saidly comprises according to sip request message and the calling step of connecting set up between said VoIP terminal and the emergency through said core net:
According to corresponding IP address and source port number in the said sip request message and the local urgent route data of typing, from the preset matching record sheet, obtain the routing iinformation of corresponding emergency;
Send the sip response message that carries said routing iinformation to said core net; According to said sip response message said sip request message is forwarded to the emergency of said correspondence by said core net, so that the emergency of said correspondence is called out according to said sip request message and said VoIP terminal.
3. method according to claim 1 is characterized in that, saidly also comprises after setting up calling step of connecting between said VoIP terminal and the emergency according to sip request message and through said core net:
Receive the urgent locating request message that said emergency is sent; Said urgent locating request message carries the IP address and the source port number of the network address translation apparatus at place, VoIP terminal; And/or the IP address and the source port number at terminal, and/or the IP address and the source port number of said location-server interface network address-translating device;
Terminal positional information in the said urgent route data of said emergency return cache.
4. method according to claim 3 is characterized in that, also comprises after the step of the urgent locating request message that said reception emergency is sent:
Send the SUPL INIT message that requires this VoIP terminal and said emergency to call out to said VoIP terminal through said core net;
Receive the SUPL POS INIT message of said VoIP terminal feedback; Said SUPL POS INIT message carries the IP address and/or the source port number at said VoIP terminal, and/or the IP address and the source port number of the network address translation apparatus at place, VoIP terminal;
Obtain said VoIP location information of terminals according to SUPL POS INIT message, and return to said emergency.
5. according to claim 3 or 4 described methods, it is characterized in that said urgent locating request message also carries position accuracy demand information.
6. an IP-based urgent location-server is characterized in that, comprising:
The emergency call request receiver module is used to receive the urgent call sip request message at the VoIP terminal that core net transmits; Said sip request message carries the IP address and the source port number of the network address translation apparatus at place, said VoIP terminal, and/or the IP address and the source port number at VoIP terminal;
Call out to connect and to set up module, be used for according to said sip request message and set up said VoIP terminal being connected with calling between the emergency through said core net.
7. server according to claim 6 is characterized in that, said calling connection is set up module and comprised:
The routing iinformation acquiring unit is used for from the preset matching record sheet, obtaining the routing iinformation of corresponding emergency according to said sip request message corresponding IP address and source port number and the local urgent route data of typing;
The response message transmitting element; Be used for sending the sip response message that carries said routing iinformation to said core net; According to said sip response message said sip request message is forwarded to the emergency of said correspondence by said core net, so that the emergency of said correspondence is called out according to said sip request message and said VoIP terminal.
8. according to claim 6 or 7 described servers, it is characterized in that said server also comprises:
Urgent Location Request receiver module is used to receive the urgent locating request message that said emergency is sent; Said urgent locating request message carries the IP address and the source port number of the network address translation apparatus at place, VoIP terminal; And/or the IP address and the source port number at terminal, and/or the IP address and the source port number of said location-server interface network address-translating device;
The positional information feedback module is used for the terminal positional information to the said urgent route data of said emergency return cache.
9. server according to claim 8 is characterized in that, said server also comprises:
SUPL INIT message transmission module is used for sending the SUPL INIT message that requires this VoIP terminal and said emergency to call out to said VoIP terminal through said core net;
SUPL POS INIT message sink module is used to receive the SUPL POS of said VoIP terminal feedback
INIT message; Said SUPL POS INIT message carries the IP address and/or the source port number at said VoIP terminal, and/or the IP address and the source port number of the network address translation apparatus at place, VoIP terminal;
Said positional information feedback module also is used for obtaining said VoIP location information of terminals according to SUPL POS INIT message, and returns to said emergency.
10. an IP-based urgent navigation system is characterized in that, comprising: VoIP terminal, the location-server that is connected through core net with said VoIP terminal and with the emergency of said location-server wired connection, wherein:
Said VoIP terminal is used for sending the urgent call sip request message to core net, transmits said sip request message to said location-server by said core net;
Said location-server is used to receive the said sip request message that core net is transmitted; Said sip request message carries the IP address and the source port number of the network address translation apparatus at place, said VoIP terminal; And/or the IP address and the source port number at VoIP terminal, and according to said sip request message and set up said VoIP terminal through said core net and be connected with calling between the emergency;
Said emergency is used for calling out according to said sip request message and said VoIP terminal.
11. system according to claim 10 is characterized in that, said location-server is each described server among the claim 6-9.
CN201010293876.1A 2010-09-19 2010-09-19 Emergency positioning method based on IP, server and system thereof Expired - Fee Related CN102413195B (en)

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