CN102263779A - Method and system for allocating public safety answering point to emergency call - Google Patents
Method and system for allocating public safety answering point to emergency call Download PDFInfo
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Abstract
The invention discloses a method and a system for allocating a public safety answering point to an emergency call. The method comprises that: a network side or a terminal stores a first public safety answering point (PSAP) allocated to an emergency call request of the terminal; the network side allocates the first PSAP to the next emergency call request after receiving the next emergency call request from the terminal in a given time; and the terminal performs the next emergency call by using the first PSAP. By the method and the system, the PSAP which is allocated to the emergency call request of the terminal is stored on the network side or the terminal to solve the problem that the connectivity of the emergency call cannot be ensured when user equipment (UE) moves and further achieve the effect of improving the performance of the system.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of method and system that distributes public safety answering point (Public Safety Answering Point, abbreviation PSAP also can be called urgency communication and accept the center) for emergent session.
Background technology
IP Multimedia System (IMS, IP Multimedia Subsystem) be the core of New Generation of Communication network, its distinguishing feature is to have adopted Session initiation Protocol (SIP, SessionInitiation Protocol) system, communication with insert irrelevantly, and possess multiple media business controlled function and separate with bearing capacity, calling separates with session, application separates with service, business and network detach, and multiple functions such as mobile network and internet integrated services.
Because IMS and the irrelevant characteristics of access, emergent session (EMC under the IMS, Emergency Call) business, can build at GPRS (GPRS, General Packet Radio Service) network and the Long Term Evolution (SAE of system, SystemArchitecture Evolution) on the network, provides unified emergent session control.
User terminal (UE in the prior art, User Equipment) carries out the network architecture schematic diagram of EMC business by inserting the SAE network, as shown in Figure 1, this framework comprises: SAE network portion, policy and charging control (PCC, Policy Charging Control) partly, location-based service (LCS, Location Service) part and IMS urgency traffic part.
Wherein, bearer management and the mobile management function of SAE network portion in order to bottom to be provided, the network element of this part mainly comprises: the wireless base station of enhancing (eNodeB), Mobility Management Entity (MME, Mobility Management Entity) and system's Long Term Evolution gateway (SAE GW, System Architecture Evolution Gateway).SAE GW is the functional entity of user's face, is used to carry out the user side data route and handles, and is divided into two kinds of gateway (S-GW, Serving GW) and packet data network gateways (P-GW, Packet DataNetwork GW).
The PCC part is in order to set up efficient strategy, to charge and control at bottom bearing bed and upper-layer service layer, the network element of this part mainly comprises: "Policy and Charging Rules Function (PCRF, Policyand Charging Rules Function) entity and strategy and charge execution function (PCEF, Policy and Charging Enforcement Function) entity.
LCS is partly with thinking that emergent session provides location-based service and public safety answering point (PSAP, Public Safety Access Point) address, the network element of this part mainly comprises: position requests function (LRF, Location Require Function) entity and Gateway Mobile Location Center (GMLC, Gateway Mobile Location Center).
IMS urgency traffic part is in order to the session of control and processing emergent session, the network element of this part mainly comprises: home subscriber server (HSS, Home Subscriber Server), CSCF (CSCF, Call Session Control Function).The subscription data of the main leading subscriber of HSS is positioned at home network.CSCF is the core network element of control conversation procedure, comprise: proxy CSCF (P-CSCF, Proxy-CSCF), inquiry CSCF (I-CSCF, Interrogating-CSCF), serving CSCF (S-CSCF, Serving-CSCF), urgent CSCF (E-CSCF, Emergency-CSCF).Wherein, E-CSCF is the session control center of emergent session, and which public safety answering point PSAP its decision emergent session is routed to.
In correlation technique, terminal UE is initiated the process of IMS emergent session by GPRS/EPS, a series of processes that experienced access network, set up carrying and obtained the IP address, find P-CSCF, initiate emergent session, emergent session are routed to PSAP and handle.Referring to Fig. 2, for the terminal in the correlation technique inserts the method that the IMS emergent session is initiated in the back at GPRS/EPS, this method may further comprise the steps:
Step S201, UE initiates the emergent session request, and the emergent session request is routed to E-CSCF;
After step S202, E-CSCF receive the emergent session request of UE, initiate the position enquiring request to LRF, the positional information of inquiry UE, and require LRF to distribute suitable PSAP;
Step S203, LRF is from the positional information of position service function entity (such as LCS) inquiry UE, and LRF is according to the positional information of the UE that is obtained, and opsition dependent is selected a suitable PSAP from the PSAP that is disposed;
Step S204, LRF carry the current location information of UE to E-CSCF home position inquiry response, and according to regioselective PSAP;
Step S205, E-CSCF gives this PSAP with emergent session request route;
Step S206 finishes follow-up emergent session process between PSAP and UE.
Usually can have a plurality of PSAP in network, each PSAP all has the scope of its administration, and promptly each PSAP is corresponding to the certain location regional extent.In flow process shown in Figure 2, LRF selects suitable PSAP according to the current location information of UE, when UE is moved, because variation has taken place the current location of UE, so may be when initiating emergent session next time, LRF can select the PSAP different with emergent session before.
Because emergent session is not limited only to audio call, under some special situations (such as the deaf-mute), emergent session can be undertaken by short message service, IMS messaging services.Yet the inventor finds correlation technique after UE is moved, and with the different PSAP of repeatedly emergent session distribution of UE, causes keeping the continuity of emergency services.
Summary of the invention
Main purpose of the present invention is to provide a kind of method and system for emergent session distribution public safety answering point, to address the above problem at least.
According to an aspect of the present invention, provide a kind of method, having comprised: the PSAP that the emergent session request of network side or terminal preservation terminal is assigned with for emergent session distribution public safety answering point; At the appointed time, after network side is received the next emergent session request of terminal, for next emergent session request distributes a PSAP; Terminal uses a PSAP to carry out next emergent session.
According to a further aspect in the invention, provide a kind of emergent session to distribute the system of public safety answering point, having comprised: network side apparatus and terminal; Network side apparatus or terminal are used to preserve the PSAP that the emergent session request of terminal is assigned with; In network side apparatus also is used at the appointed time, receive the next emergent session request of terminal after, for next emergent session request distributes a PSAP; Terminal also is used to use a PSAP to carry out next emergent session.
By the present invention, the PSAP that adopts the emergent session request of preserving terminal on network side or terminal to be assigned with can't guarantee the successional problem of emergent session when having solved UE and moving, and then reach the effect that improves the performance of system.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the network architecture schematic diagram according to the execution EMC business of correlation technique;
Fig. 2 is the method flow diagram according to the initiation IMS emergent session of correlation technique;
Fig. 3 is the method flow diagram for emergent session distribution PSAP according to the embodiment of the invention;
Fig. 4 is the method flow diagram that saves as the PSAP that UE distributes according to the LRF of the embodiment of the invention 1 or E-CSCF;
Fig. 5 is that the LRF according to the embodiment of the invention 1 is the method flow diagram that UE distributes identical PSAP;
Fig. 6 is that the E-CSCF according to the embodiment of the invention 2 is the method flow diagram that UE distributes identical PSAP;
Fig. 7 is the system architecture diagram according to the emergent session behind the introducing SAP registering entities of the embodiment of the invention 3;
Fig. 8 is the method flow diagram for emergent session distribution PSAP according to the embodiment of the invention 3;
Fig. 9 is the method flow diagram for emergent session distribution PSAP according to the embodiment of the invention 4;
Figure 10 is the method flow diagram for emergent session distribution PSAP according to the embodiment of the invention 5;
Figure 11 is the method flow diagram for emergent session distribution PSAP according to the embodiment of the invention 6; And
Figure 12 is the system architecture diagram for emergent session distribution PSAP according to the embodiment of the invention 7.
Embodiment
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
The SAE network of execution emergent session business comprises network elements such as E-CSCF, PSAP and LRF as shown in Figure 1, and a PSAP registering entities can also be set in this SAE network, and this PSAP registering entities is used to preserve the PSAP of terminal iidentification and the use of terminal emergent session.Annexation between each network element is followed the regulation in the related communication standard, and introducing each embodiment of the present invention below is that the basis is implemented with this SAE network all.
Fig. 3 shows the method flow diagram for emergent session distribution PSAP according to the embodiment of the invention, and this method may further comprise the steps:
Step S302, network side or terminal are preserved the PSAP that the emergent session request of this terminal is assigned with;
Wherein, the network side of preserving a PSAP can be E-CSCF, also can be LRF, perhaps can be PSAP registering entities newly-increased in network;
Preserve a PSAP that the emergent session request of this terminal is assigned with and comprise the corresponding relation of preserving this terminal and a PSAP, this corresponding relation can identify (as the PSAP address) with the sign of terminal and a PSAP and represent.
Step S304, at the appointed time in, after network side is received the next emergent session request of this terminal, for this next one emergent session request distributes a PSAP;
When the next emergent session request of this terminal not at the appointed time in the time, network side will be redistributed PSAP for this terminal, and the PSAP that preservation is this time redistributed is as a PSAP;
Step S306, terminal uses a PSAP to carry out next emergent session.
When correlation technique is distributed PSAP for UE at every turn, be based on all that the current position of UE distributes, and the embodiment of the invention is when the PSAP that distributes follow-up emergent session to use for UE, if former and later two emergent session correlations are bigger, be that the time interval is shorter, then be that follow-up emergent session distributes and the identical PSAP of emergent session before, in order to the continuity of assurance emergent session.Usually, this fixed time is set according to the operation strategy by operator.
The PSAP that present embodiment is assigned with by the emergent session request of preserving terminal on network side or terminal, the emergent session of this terminal all anchors on this PSAP in can making at the appointed time, and then can't guarantee the successional problem of emergent session when having solved UE and moving, improved the performance of system.
In the present embodiment, be after UE has distributed PSAP at LRF, LRF or E-CSCF preserve this PSAP within a certain period of time in this locality, and after next UE initiated emergent session once more, it was the UE service that LRF or E-CSCF can directly select this PSAP.
Fig. 4 is the method flow diagram that LRF or E-CSCF save as the PSAP of UE distribution, and this method may further comprise the steps:
Step S401, UE initiates the emergent session request, and the emergent session request is routed to E-CSCF;
After step S402, E-CSCF receive the emergent session request, initiate the position enquiring request, and to require LRF be that UE distributes PSAP to LRF;
Step S403, LRF be from the current location information of location server (as the LCS system) inquiry UE, and distribute a suitable PSAP according to positional information.Herein, the PSAP that supposes current distribution is PSAP1;
Alternatively, LRF saves as the PSAP1 that this UE distributes in this locality, and sets a time bar, and in this time bar, UE can continue to use this PSAP1.
Step S404, LRF sends the position enquiring response to E-CSCF, wherein the position enquiring response carry UE current location information, be the PSAP (being PSAP1) of UE distribution herein;
Step S405, E-CSCF saves as the PSAP1 that this UE distributes, and sets a time limit after receiving the position enquiring response that LRF sends in this locality, and in this time bar, UE can continue to use this PSAP1; This step is an optional step.
Step S406, E-CSCF gives PSAP1 with emergent session request route;
Step S407 carries out follow-up emergent session processing procedure between PSAP1 and UE.
In flow process shown in Figure 4, LRF, E-CSCF all can save as the PSAP address that UE distributes in this locality, and further set a time bar, and the PSAP that exceeds this time limit preservation is invalid, should redistribute PSAP for UE.
Based on method shown in Figure 4, after UE moved, when initiating that emergent session is professional for the second time, LRF was that UE distributes the method with the PSAP that the emergent session business is identical for the first time, and referring to Fig. 5, this method may further comprise the steps:
Step S501, UE initiates the emergent session request, and the emergent session request is routed to E-CSCF;
After step S502, E-CSCF receive the emergent session request, initiate the position enquiring request, and to require LRF be that UE distributes PSAP to LRF;
Step S503, LRF executing location query script, the current location information of inquiry UE, LRF carries out the PSAP assigning process simultaneously, for UE distributes suitable PSAP;
In this step, if LRF has stored the information of before having distributed PSAP for this UE, be PSAP1, and this PSAP1 is still in effective time, then LRF can directly use this PSAP1, and need not to redistribute PSAP, even may occur should distributing PSAP2 to give UE, also use this PSAP1 according to the current location of UE.
Step S504, LRF sends the position enquiring response to E-CSCF, wherein carries the current location information of UE and is the PSAP (present embodiment is PSAP1) of UE distribution;
Step S505, E-CSCF gives PSAP1 with emergent session request route;
Step S506 carries out follow-up emergent session processing procedure between PSAP1 and UE;
In the present embodiment, LRF has preserved the PSAP information of before having distributed for this UE, and this time emergent session and last time emergent session the interval in time bar, therefore LRF still distributes this PSAP for this UE, can't guarantee the successional problem of emergent session when having solved UE and moving, improve the performance of system.
Embodiment 2
Based on method shown in Figure 4, after UE moved, when initiating that emergent session is professional for the second time, E-CSCF was that UE distributes the method with the PSAP that the emergent session business is identical for the first time, and referring to Fig. 6, this method may further comprise the steps:
Step S601, UE initiates the emergent session request, and the emergent session request is routed to E-CSCF;
After step S602, E-CSCF receive the emergent session request, initiate the position enquiring request, and to require LRF be that UE distributes PSAP to LRF;
Step S603, LRF executing location query script, the current location information of inquiry UE.LRF carries out the PSAP assigning process simultaneously, for UE distributes suitable PSAP.Present embodiment this time is that UE distribution PSAP2 is that example describes with LRF;
Step S604, LRF sends the position enquiring response to E-CSCF, wherein carries the current location information of UE and is the PSAP (being PSAP2) of UE distribution herein;
Step S605, E-CSCF receive the position enquiring response, and obtain PSAP2;
In this step, because E-CSCF has preserved previous PSAP information of distributing for UE, i.e. PSAP1, and this emergent session and last time emergent session the interval in time bar, so E-CSCF can ignore the PSAP2 that LRF returns, and still distribute PSAP1 for UE.
Step S606, E-CSCF gives PSAP1 with emergent session request route;
Step S607 carries out follow-up emergent session processing procedure between PSAP1 and UE;
In flow process shown in Figure 6, E-CSCF has preserved the PSAP information of before having distributed for this UE, and in time bar, this UE has initiated emergent session business next time, so E-CSCF still distributes this PSAP for this UE.
Preferably, if E-CSCF does not need the positional information to LRF inquiry UE, then E-CSCF can directly use the PSAP information that is kept, and promptly PSAP1 gives this PSAP1 with emergent session request route; If E-CSCF need inquire about the positional information of UE to LRF, E-CSCF can not indicate LRF to distribute PSAP in the query requests of position, thereby LRF can be for UE distribute PSAP, thereby E-CSCF utilizes previous PSAP information of preserving to come the route emergent session.
In the present embodiment, E-CSCF has preserved the PSAP information of before having distributed for this UE, and this time emergent session and last time emergent session the interval in time bar, therefore E-CSCF still distributes this PSAP for this UE, can't guarantee the successional problem of emergent session when having solved UE and moving, improve the performance of system.
The foregoing description 1 and embodiment 2 can be implemented in LRF/E-CSCF and go up the previous PSAP information for the UE distribution of preservation, so that be this this UE distribution PSAP of preservation before when this UE initiates emergent session next time, have guaranteed the continuity of emergent session.
Embodiment 3
Present embodiment is introduced the PSAP registering entities in the SAE network, when distributing PSAP for UE, initiate inquiry to this PSAP registering entities, if this PSAP registering entities is not preserved the PSAP that distributes before this UE, then for UE distribution PSAP and be saved in this PSAP registering entities.
For example, the PSAP that the emergent session request of PSAP registering entities preservation terminal is assigned with and the sign of this terminal, E-CSCF or LRF are that the next emergent session request of this terminal is when distributing PSAP, initiating query requests to this PSAP registering entities, be this next one emergent session request distribution PSAP according to the result of query requests.
Fig. 7 shows the system architecture diagram according to the emergent session behind the introducing PSAP registering entities of the embodiment of the invention, in this system, LRF, E-CSCF, PSAP all may with PSAP registering entities (PSAP Registration Entity, PRE) set up logic interfacing Pr, set up the Pr3 interface between Pr2 interface, PSAP and the PRE as setting up between E-CSCF and the PRE to set up between Pr1 interface, LRF and the PRE.On these Pr interfaces, realize being registered as for the PSAP of certain UE distribution, to PRE the function of the PSAP of certain UE distribution to the PRE inquiry.
Under roaming condition, this PRE entity can realize then that as being deployed in home network UE still can be linked into the purpose of same PSAP when switching to heterogeneous networks.If this PRE entity is deployed in the visit net, can only guarantee that then UE still is linked on the same PSAP when mobile in this visit is netted.
In addition, PRE can consider independent deployment as a logical functional entity, also can consider to close on the functional entitys such as being deployed in LRF, E-CSCF, if PRE is deployed in home network, then PRE can close and be deployed on the HSS.
Fig. 8 shows the method flow diagram for emergent session distribution PSAP according to the embodiment of the invention, and there are interface in LRF and PRE in this method, may further comprise the steps:
Step S801, UE initiates the emergent session request, and the emergent session request is routed to E-CSCF;
After step S802, E-CSCF receive the emergent session request, initiate the position enquiring request, and to require LRF be that UE distributes PSAP to LRF;
Step S803, LRF executing location query script, the current location information of inquiry UE, LRF carries out the PSAP assigning process simultaneously, for UE distributes suitable PSAP, such as, according to the UE current position information, LRF is that UE has distributed PSAP2;
Step S804, LRF sends the PSAP register requirement to PRE (PSAP registering entities), carries sign and the current PSAP (being PSAP2) for the UE distribution of UE;
Step S805, PRE are updated to the PSAP that UE distributes;
Particularly, in this step, it is the PSAP that UE distributes that PRE adopts following policy update:
A) if PRE is current for this UE has preserved a PSAP, such as PSAP1, and this PSAP1 is still in the effective time that sets, and then to set current PSAP for the UE distribution still be PSAP1 to PRE.
B) do not preserve a PSAP if PRE is current for this UE, though perhaps before preserved a PSAP, as PSAP1, but this PSAP1 has exceeded time limit effective time that sets, then PRE thinks and set up new registration procedure PSAP for UE, so PRE obtains the PSAP (being PSAP2) that LRF provides to PRE, this PSAP2 is updated to the PSAP information that UE distributes.
Step S806, PRE returns the registration response to LRF, and in this registration response, PRE carries the PSAP information into the current distribution of UE;
Particularly, in this step, if according to the regular A among the step S805), the PSAP that PRE sets the current distribution of UE is PSAP1, then PRE returns PSAP1; If according to the regular B among the step S805), the PSAP that PRE sets the current distribution of UE is PSAP2, then PRE returns PSAP2;
Step S807, LRF receive the PSAP registration response that PRE returns, the PSAP that acquisition is wherein carried, and, comprise the UE current position information to E-CSCF home position inquiry response; And, in the inquiry response of position, comprise the PSAP that PRE returns;
Step S808a, step S808b, E-CSCF are routed to corresponding PSAP according to the PSAP that obtains from LRF with the emergent session request;
Step S809 carries out follow-up emergent session processing procedure between PSAP and UE.
Flow process shown in Figure 8 has been described LRF and has been the process of the PSAP that UE distributed to PRE registration, inquiry, carry out in the process of registration, inquiry to PRE at LRF, can only utilize a piece of news to realize, the PSAP that this implementation method can exist following modification: LRF to distribute for UE from the PRE inquiry earlier, if obtained current PSAP for the UE distribution from PRE, then directly use this PSAP, if not from the PSAP of PRE acquisition for this UE distribution, then LRF selects a suitable PSAP according to the positional information of UE, and it is saved among the PRE.
Present embodiment is registered the PSAP that distributes for UE by LRF to PRE, when the time ratio of a next emergent session request and a last emergent session requesting interval is nearer, PRE can upgrade the newly assigned PSAP of LRF, twice emergent session request can distribute identical PSAP before and after making, guarantee the continuity of emergent session, improved the performance of system.
Embodiment 4
Present embodiment provides a kind of method of distributing PSAP for emergent session, there is interface in this method with E-CSCF and PRE, E-CSCF is that example describes to the PSAP that PRE inquired about and be registered as the UE distribution, flow process shown in Figure 8 among its basic principle and the embodiment 3 is similar, referring to Fig. 9, step S901-step S904 in this method is identical with step S801-step S804, and step S907-step S909 is identical with step S807-step S809, and difference is:
In the S905 step, E-CSCF carries out the PSAP registration process with this PSAP2 to PRE obtain PSAP (being PSAP2) from the position enquiring response that LRF returns after.Adopt and method shown in Figure 8, PRE is updated to the PSAP of UE distribution and returns to E-CSCF, and as step S906 and step S907, thereby E-CSCF is routed to suitable PSAP with the emergent session request.
In like manner, also there is variant embodiment in the flow process of Fig. 9, and PSAP inquiry soon, enrollment process can split into multiple messages by a message, but its basic principle is constant.
Present embodiment is registered the PSAP that distributes for UE by E-CSCF to PRE, when the time ratio of a next emergent session request and a last emergent session requesting interval is nearer, PRE can upgrade PSAP, twice emergent session request can distribute identical PSAP before and after making, guarantee the continuity of emergent session, improved the performance of system.
Present embodiment provides a kind of method for emergent session distribution PSAP, and there is interface in this method with PSAP and PRE, and the PSAP that inquires about and be registered as the UE distribution to PRE is that example describes, and referring to Figure 10, this method may further comprise the steps:
Step S1001, E-CSCF receive the emergent session request of UE;
Step S1002, E-CSCF is PSAP2 from the PSAP that LRF obtains the current emergent session request distribution of UE, E-CSCF is routed to PSAP2 with this emergent session request;
Step S1003, PSAP2 initiates the PSAP registration process to PRE, and the sign and the PSAP2 that are about to this UE send to PRE;
After step S1004, PRE receive the register requirement of PSAP2, the PSAP of this UE is upgraded;
Step S1005, PRE determines that according to the sign of UE this UE had distributed PSAP1, and PSAP1 returns to PSAP2 with PSAP1 in effective time;
Adopt and method shown in Figure 8 in step S1004, S1005, PRF is updated to the PSAP of UE distribution and returns to PSAP2.If the PSAP that PSAP2 obtains from the PSAP registration response that PRE returns is not self, for example is PSAP1, then PSAP2 can carry out following process:
A) as step S1006a, PSAP2 serves as the agency, gives PSAP1 with current emergent session route;
B) as step S1006b1～S1006b2, PSAP2 returns the emergent session redirect message to E-CSCF, carries PSAP1 in redirect message, after E-CSCF receives the emergent session redirect message, current emergent session request is routed to PSAP1;
Step S1007 carries out follow-up emergent session processing procedure between PSAP and UE.
Flow process shown in flow process shown in Figure 10 and Fig. 4,8 is similar, main difference is: selected PSAP2 if LRF is UE, when E-CSCF was routed to PSAP2 with emergent session, PSAP2 initiated the PSAP registration process to PRE, and PRF is updated to the PSAP of UE distribution and returns to PSAP2.If the PSAP that obtains the PSAP that PSAP2 returns from the PRE registration response is not self, then can be by above-mentioned A) or B) in method will current emergent session request route to the PSAP of correspondence.
Present embodiment is registered the PSAP that distributes for UE by PSAP to PRE, when the time ratio of a next emergent session request and a last emergent session requesting interval is nearer, PRE can upgrade PSAP, twice emergent session request can distribute identical PSAP before and after making, guarantee the continuity of emergent session, improved the performance of system.
Embodiment 6
Present embodiment provides a kind of method for emergent session distribution PSAP, and it is that example describes that this method is preserved distribution PSAP with UE self, and referring to Figure 11, this method may further comprise the steps:
Step S1101 is identical to step S205 with step S201 to step S1105, repeats no more here;
The normal emergent session of comparing is set up flow process, and the improvement of present embodiment is following several steps:
Step S1106, when PSAP and UE confirmed setting up of emergent session, E-CSCF set up in the session that sends to UE and carries current PSAP information for the UE distribution in the message, is PSAP1 herein;
After step S1107, UE receive PSAP information, preserve PSAP information, promptly preserve PSAP1 in this locality;
Step S1108, UE carry the PSAP information of previous preservation, i.e. PSAP1 when sending follow-up emergent session request to E-CSCF.And E-CSCF will utilize this PSAP1, and the emergent session request is routed to this PSAP1.
E-CSCF will utilize this PSAP1, the emergent session request is routed to this PSAP1 comprise: if do not need to initiate the position enquiring request to LRF, E-CSCF directly gives PSAP1 with current emergent session request route; Initiate the position enquiring request to LRF if desired, E-CSCF sends the position enquiring request to LRF, and not indicating LRF in the position enquiring request is that UE distributes PSAP; After E-CSCF receives the UE current position information that LRF returns, give PSAP1 with current emergent session request route.
Step S1109 carries out follow-up emergent session processing procedure between PSAP and UE.
UE in the present embodiment carries before the PSAP information of preservation, the PSAP that can judge preservation earlier whether in effective time, if, then carry this PSAP information, otherwise do not carry, finish the foundation of emergent session according to related procedure; Perhaps, after E-CSCF receives the PSAP that UE sends, can judge this PSAP earlier whether in effective time, if, then on this PSAP with current emergent session request route, otherwise finish the foundation of emergent session according to related procedure.
In the present embodiment, after UE initiated emergent session for the first time, network was that it distributes PSAP, and set up after session in the process this PSAP information is passed to UE, and UE preserves this PSAP in this locality.When UE when initiating follow-up emergent session, the PSAP information that UE will before preserve is carried to E-CSCF, then E-CSCF can utilize the PSAP route emergent session that UE provides, and to realize that repeatedly emergent session anchors to same PSAP, has guaranteed the continuity of emergent session.
Embodiment 7
Figure 12 shows the system for emergent session distribution PSAP according to the embodiment of the invention, comprising: network side apparatus 120 and terminal 124;
Network side apparatus 120 or terminal 124 are used to preserve the PSAP that the emergent session request of terminal 124 is assigned with;
In network side apparatus 120 also is used at the appointed time, receive terminal 124 next emergent session requests after, for next emergent session request distributes a PSAP;
Terminal 124 also is used to use a PSAP to carry out next emergent session.
Wherein, network side apparatus 120 can be E-CSCF, also can be LRF, perhaps can be PSAP registering entities newly-increased in network;
Preserve a PSAP and comprise the corresponding relation of preserving this terminal and a PSAP, this corresponding relation can be represented with the sign and the PSAP sign (as the PSAP address) of terminal.
The PSAP that is assigned with by the emergent session request of on network side apparatus or terminal, preserving terminal, the emergent session of this terminal all anchors on this PSAP in can making at the appointed time, and then can't guarantee the successional problem of emergent session when having solved UE and moving, improved the performance of system.
Preferably, network side apparatus comprises LRF and E-CSCF; Wherein, LRF is used to preserve an above-mentioned PSAP; E-CSCF, be used to receive terminal 124 next emergent session requests after, initiate the position enquiring request to LRF, requiring LRF in this position enquiring request is that terminal 124 is distributed PSAP;
After LRF also is used to receive the position enquiring request of E-CSCF, inquiry terminal 124 current position information; If determine a PSAP in effective time, then be that terminal 124 is distributed a PSAP, and send the position enquiring response to E-CSCF, position enquiring response carried terminal 124 current position information and a PSAP; E-CSCF gives a PSAP with next emergent session request route after also being used to receive this position enquiring response.
Preferably, network side apparatus 120 comprises E-CSCF; This E-CSCF is used to preserve a PSAP, and after receiving the next emergent session request of terminal 124, determines a PSAP in effective time, gives a PSAP with next emergent session request route.
Preferably, network side apparatus 120 comprises E-CSCF, is used for sending session to terminal 124 and sets up message, and the PSAP that the 124 emergent session requests of message carried terminal distribute is set up in session;
Terminal 124 is used to preserve a PSAP, and initiates next emergent session request, and a PSAP is carried in this next one emergent session request; E-CSCF determines a PSAP in effective time after also being used to receive terminal 124 next emergent session requests, gives a PSAP with next emergent session request route.
Network side apparatus 120 comprises: the PSAP registering entities is used to preserve the sign of a PSAP and terminal 124; And when receiving query requests, determine that according to the sign of terminal 124 terminal 124 distributed a PSAP, and a PSAP returns to E-CSCF with a PSAP in effective time;
Network side apparatus 120 also comprises: E-CSCF or LRF, when being used to the next emergent session request of terminal 124 to distribute PSAP, initiate query requests to the PSAP registering entities, and distribute a PSAP according to the result of query requests for next emergent session request.
As can be seen from the above description, the present invention has realized following technique effect: the PSAP that is assigned with by the emergent session request of preserving terminal on network side or terminal, the emergent session of this terminal all anchors on this PSAP in can making at the appointed time, and then can't guarantee the successional problem of emergent session when having solved UE and moving, improved the performance of system.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, and in some cases, can carry out step shown or that describe with the order that is different from herein, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (15)
1. the method for emergent session distribution public safety answering point PSAP is characterized in that, comprising:
Network side or terminal are preserved the PSAP that the emergent session request of described terminal is assigned with;
At the appointed time, after described network side is received the next emergent session request of described terminal, for described next emergent session request distributes a described PSAP;
Described terminal uses a described PSAP to carry out next emergent session.
2. method according to claim 1 is characterized in that, the position requests functional entity LRF of described network side preserves a described PSAP;
At the appointed time, described network side comprises for described next emergent session request distributes a described PSAP after receiving the next emergent session request of described terminal:
Emergency call session controlled function entity E-CSCF initiates the position enquiring request to described LRF after receiving the next emergent session request of described terminal, and requiring described LRF in the described position enquiring request is PSAP of described terminal distribution;
Described LRF receives to after the described position enquiring request, inquires about described terminal current position information;
If determine a described PSAP in effective time, then described LRF is the described PSAP of described terminal distribution, and sends the position enquiring response to described E-CSCF, and a described terminal current position information and a described PSAP are carried in described position enquiring response;
Described E-CSCF gives a described PSAP with described next emergent session request route.
3. method according to claim 1 is characterized in that, the E-CSCF of described network side preserves a described PSAP;
At the appointed time, described network side comprises for described next emergent session request distributes a described PSAP after receiving the next emergent session request of described terminal:
After E-CSCF receives the next emergent session request of described terminal, determine a described PSAP in effective time, give a described PSAP described next emergent session request route.
4. method according to claim 1, it is characterized in that, terminal is preserved the PSAP that the emergent session request of described terminal is assigned with and comprised: described terminal receives and sets up message from the session of E-CSCF, described session is set up message and is carried the PSAP that described terminal emergent session request distributes, and described terminal is preserved a described PSAP;
At the appointed time, described network side comprises for described next emergent session request distributes a described PSAP after receiving the next emergent session request of described terminal:
Described terminal is initiated next emergent session request, and a described PSAP is carried in described next emergent session request;
E-CSCF determines a described PSAP in effective time after receiving the next emergent session request of described terminal, gives a described PSAP with described next emergent session request route.
5. according to claim 3 or 4 described methods, it is characterized in that, comprise to a described PSAP described next emergent session request route:
If do not need to initiate the position enquiring request to LRF, described E-CSCF directly gives a described PSAP with described next emergent session request route;
Initiate the position enquiring request to described LRF if desired, described E-CSCF sends the position enquiring request to described LRF, and not indicating LRF in the described position enquiring request is described terminal distribution PSAP; After described E-CSCF receives the described terminal current position information that described LRF returns, give a described PSAP with described next emergent session request route.
6. method according to claim 1 is characterized in that the PSAP registering entities of described network side is preserved the sign of a described PSAP and described terminal;
For distributing a described PSAP, described next emergent session request comprises:
E-CSCF or LRF are described next emergent session request when distributing PSAP, initiate query requests to described PSAP registering entities, distribute a described PSAP according to the result of query requests for described next emergent session request.
7. method according to claim 6 is characterized in that, the sign that the PSAP registering entities of described network side is preserved a described PSAP and described terminal comprises:
LRF is after the request of described terminal emergent session distributes a PSAP, PSAP registering entities in described network side sends the PSAP register requirement, described PSAP register requirement is carried the sign and a described PSAP of described terminal, and described PSAP registering entities is preserved the sign and a described PSAP of described terminal;
For distributing a described PSAP, described next emergent session request comprises:
LRF is that the next emergent session request of described terminal distributes before the PSAP, sends the PSAP query requests to described PSAP registering entities, and described PSAP query requests is carried the sign of described terminal;
Described PSAP registering entities is defined as described terminal and had distributed a described PSAP, and a described PSAP returns to described LRF with a described PSAP in effective time;
Described LRF is that described next emergent session request distributes a described PSAP.
8. method according to claim 6 is characterized in that, the sign that the PSAP registering entities of described network side is preserved a described PSAP and described terminal comprises:
The PSAP registering entities of E-CSCF in described network side sends the PSAP register requirement, described PSAP register requirement is carried the sign of described terminal and is the PSAP that described terminal emergent session request distributes, and described PSAP registering entities is preserved the sign and a described PSAP of described terminal;
For distributing a described PSAP, described next emergent session request comprises:
Described E-CSCF sends the PSAP query requests to described PSAP registering entities, and described PSAP query requests is carried the sign of described terminal;
Described PSAP registering entities is defined as described terminal and had distributed a described PSAP, and a described PSAP returns to E-CSCF with a described PSAP in effective time;
Described E-CSCF gives a described PSAP with described next emergent session request route.
9. method according to claim 8, it is characterized in that, described E-CSCF also comprised before described PSAP registering entities sends the PSAP query requests: it is the 2nd PSAP of the next emergent session request distribution of described terminal that described E-CSCF receives from LRF, and described PSAP query requests is carried described the 2nd PSAP.
10. method according to claim 6 is characterized in that, the sign that the PSAP registering entities of described network side is preserved a described PSAP and described terminal comprises:
After E-CSCF is routed to a PSAP with the request of described terminal emergent session, the PSAP registering entities of a described PSAP in described network side sends a PSAP register requirement, a described PSAP register requirement is carried the sign and a described PSAP of described terminal, and described PSAP registering entities is preserved the sign and a described PSAP of described terminal;
For distributing a described PSAP, described next emergent session request comprises:
E-CSCF gives described the 2nd PSAP with described next emergent session request route after receiving and being the 2nd PSAP that distributes of the next emergent session request of described terminal from LRF;
Described the 2nd PSAP sends the 2nd PSAP register requirement to described PSAP registering entities, and described the 2nd PSAP register requirement is carried the sign and described the 2nd PSAP of described terminal;
Described PSAP registering entities is defined as described terminal and had distributed a described PSAP, and a described PSAP returns to the 2nd PSAP with a described PSAP in effective time;
Described the 2nd PSAP gives a described PSAP with described next emergent session request route, or described the 2nd PSAP returns the emergent session redirect message to described E-CSCF, described redirect message carries a described PSAP, gives a described PSAP by described E-CSCF with described next emergent session request route.
11. the system for emergent session distribution public safety answering point PSAP is characterized in that, comprising: network side apparatus and terminal;
Network side apparatus or terminal are used to preserve the PSAP that the emergent session request of described terminal is assigned with;
In described network side apparatus also is used at the appointed time, receive the next emergent session request of described terminal after, for described next emergent session request distributes a described PSAP;
Described terminal also is used to use a described PSAP to carry out next emergent session.
12. system according to claim 11 is characterized in that, described network side apparatus comprises position requests functional entity LRF, emergency call session controlled function entity E-CSCF;
Described LRF is used to preserve a described PSAP;
Described E-CSCF, be used to receive the next emergent session request of described terminal after, initiate the position enquiring request to described LRF, requiring described LRF in the described position enquiring request is PSAP of described terminal distribution;
Described LRF inquires about described terminal current position information after also being used to receive the position enquiring request of described E-CSCF; If determine that a described PSAP in effective time, then is the described PSAP of described terminal distribution, and send the position enquiring response to described E-CSCF, a described terminal current position information and a described PSAP are carried in described position enquiring response;
Described E-CSCF gives a described PSAP with described next emergent session request route after also being used to receive described position enquiring response.
13. system according to claim 11 is characterized in that, described network side apparatus comprises E-CSCF;
Described E-CSCF is used to preserve a described PSAP, and after receiving the next emergent session request of described terminal, determines a described PSAP in effective time, gives a described PSAP with described next emergent session request route.
14. system according to claim 11 is characterized in that, described network side apparatus comprises E-CSCF, is used for sending session to described terminal and sets up message, and described session is set up message and carried the PSAP that described terminal emergent session request distributes;
Described terminal is used to preserve a described PSAP, and initiates next emergent session request, and a described PSAP is carried in described next emergent session request;
Described E-CSCF, also be used to receive the next emergent session request of described terminal after, determine a described PSAP in effective time, give a described PSAP with described next emergent session request route.
15. system according to claim 11 is characterized in that, described network side apparatus comprises: the PSAP registering entities is used to preserve the sign of a described PSAP and described terminal; And when receiving query requests, be defined as described terminal and distributed a described PSAP, and a described PSAP returns to E-CSCF with a described PSAP in effective time;
Described network side apparatus also comprises: E-CSCF or LRF, when being used to the next emergent session request of described terminal to distribute PSAP, initiate query requests to described PSAP registering entities, distribute a described PSAP for described next emergent session request according to the result of query requests.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010192200.3A CN102263779B (en) | 2010-05-28 | Method and system for emergent session distribution public safety answering point | |
| PCT/CN2011/074812 WO2011147329A1 (en) | 2010-05-28 | 2011-05-27 | Method and system for distributing public safety answer points to emergency session |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010192200.3A CN102263779B (en) | 2010-05-28 | Method and system for emergent session distribution public safety answering point |
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| Publication Number | Publication Date |
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| CN102263779A true CN102263779A (en) | 2011-11-30 |
| CN102263779B CN102263779B (en) | 2016-12-14 |
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| WO2011147329A1 (en) | 2011-12-01 |
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