CN102036206B - Method and system for realizing location - Google Patents

Abstract

The invention provides a method and a system for realizing location. The method comprises the following steps that: user equipment (UE) requests security user plane location (SUPL) from an SUPL location platform (SLP); the SLP determines whether the UE has SUPL location capacity; and after determining that the UE has the SUPL location capacity, the SLP establishes SUPL connection with the UE and acquires positional information of the UE. By the method, when the UE initiates an SUPL location flow from a network side and the SLP determines to transmit an SUPL initialization message to the UE, the initiated location flow is ensured to aim at the UE with the SUPL location capacity because the SLP has determined that the UE has the SUPL location capacity, location response delay due to multiple failed attempts is avoided, and quick establishment of an SUPL location process is guaranteed. Particularly, the problem of establishment time delay of an emergency call is solved. The quick establishment of the emergency call is guaranteed.

Description

A kind of method and system realizing locating

Technical field

The present invention relates to urgent call technology, espespecially a kind of method and system of the location of the realization based on user face service technology.

Background technology

IP Multimedia System (IMS, IP Multimedia Core Network Subsystem) be the core of communication network of new generation, IMS adopts Session initiation Protocol (SIP, Session Initiation Protocol) system, SIP specifies that communication is irrelevant with access, and possesses media service control function and bearing capacity separating power, calls out and session separating power, apply and serve separating power, business and network detach ability and mobile network and internet integrated services ability etc.

Due to the feature that IMS and access have nothing to do, urgency traffic (EMC under IMS, Emergency Call) can build at GPRS (GPRS, General Packet Radio Service) network, System Architecture Evolution (SAE, System Architecture Evolution) on network, provide unified urgent call to control.

In order to realize the urgency traffic under IMS, positioning service is absolutely necessary, and such as: need to route emergency calls to suitable police station according to the position of UE, police station, for the object of safety, rescue, needs the positional information knowing that UE is current.

At present, conventional location technology has two kinds: third generation partner program (3GPP, The 3rdGeneration Partnership Project) tissue definition chain of command positioning service (LCS, LocationService) technology, and user face positioning service (SUPL, the Security UserPlane Location) technology of OMA tissue definition.Wherein, SUPL location technology realizes simple and core net independence due to its framework, is widely used.

Fig. 1 is UE accesses the urgent call of IMS network architecture schematic diagram by SAE, and wherein, solid line represents signaling, dotted line represents the IP tunnel of user, as shown in Figure 1, comprise the network element of the network element of SAE network portion, the part of position location services, and the part of IMS urgency traffic.

Wherein, the network element of SAE network portion, for providing bearer management and the mobile management of bottom, comprise the wireless base station (eNodeB) of enhancing, Mobility Management Entity (MME, Mobility ManagementEntity) and user face data route processing (SAE GW).ENodeB is the control appliance of the main interface-free resources of follow-on wireless access network, can provide higher up-downgoing speed, lower transmission delay and more reliably wireless transmission.MME is in charge of and stores subscriber equipment (UE, User Equipment) context, such as UE/ user ID, mobility management states, user security parameters etc., for user distributes temporary mark, when UE quarters at this tracing area or this network, be responsible for carrying out authentication to this user.SAE gateway (GW, Gate Way) can be divided into gateway (S-GW, Serving GW) and packet data network gateway (PDN GW, also can referred to as P-GW) two kinds.S-GW is mobile anchor point between SAE system and traditional 3GPP system and the mobile anchor point between E-UTRAN.P-GW is the borde gateway of SAE and packet data network (PDN, Packet Data Network), is responsible for the access of PDN, the function such as forwarding data between SAE and PDN.

Wherein, the core network element of user face positioning service SUPL part is user face locating platform (SLP, SUPL Location Platform).In addition, the user terminal with SUPL ability is referred to as SET (SUPLEnabled Terminal), is in fact exactly the UE of integrated positioning module (as A-GPS).

Wherein, the part of IMS urgency traffic is in order to control and to process the session of urgent call.Wherein, IMS urgent call part comprises: home subscriber server (HSS, Home Subscriber Server), emergency call session controlling functions (E-CSCF, Emergency Call Session Control Function), position requests function (LRF, Location Require Function), public safety joint point (PSAP, Public SafetyAccess Point).The subscription data of HSS leading subscriber, is positioned at home network.E-CSCF controls the core network element of emergent session process, is positioned at visit net.In fact PSAP is exactly police station.LRF is a logical functional entity, and for E-CSCF, PSAP etc. provide the positional information of UE, LRF can independently dispose, and also may be included in other location server, as being integrated in SLP.

Under normal circumstances, there is the UE of SUPL ability, be configured with the SLP of home network in terminal itself, i.e. H-SLP, when UE is in non-roaming, can by realizing alternately locating with H-SLP; After UE roams into visit net, UE needs the SLP of associating H-SLP and visit net, and namely V-SLP completes location together.Extraly, due to the particularity of urgent call, must process at visit net, and general calling may be different to the processing logic of urgent call, therefore there is the special SLP that location-based service is provided for urgent call, i.e. urgent call SLP (E-SLP, Emergency SLP).Fig. 2 be there is SUPL ability UE under roaming scence, and schematic diagram mutual between locating platform.

At present, when the UE terminal and SET with SUPL ability initiate urgent call, for the location of urgent call, usually started by network side, namely adopt network side location (NI-LR, Network InitiatedLocation Request).

Fig. 3 is under LTE/EPS access, adopts SUPL as positioning service technology, and when UE initiates urgent call, network side initiates the flow chart of location, as shown in Figure 3, comprises the following steps:

Step 300:UE is attached to IP access network (IP CAN).IP CAN refers to the Access Layer comprising eNodeB, MME.

In this step, be attached in the process of network at UE, UE is assigned with IP address.Further, UE, by attaching process, finds the entrance of IMS domain and the address of P-CSCF.

Step 301:UE initiates emergency call request, namely initiates SIP INVITE to P-CSCF, wherein carries urgent mark (Emc).This call request is routed to E-CSCF.

After step 302:E-CSCF receives the emergency call request of UE, to LRF launch position inquiry request, require that LRF provides the positional information of UE.

After step 303:LRF receives the position enquiring request of E-CSCF, to SLP launch position inquiry request, SLP with UE sets up SUPL and is connected, and obtains the positional information of UE (SET).

After step 304:LRF obtains the positional information of UE from SLP, according to the PSAP that the positional information decision-making of UE is suitable, send position enquiring response to E-CSCF, return positional information and the PSAP information of UE.

After step 305:E-CSCF obtains the positional information of UE and PSAP information, the emergency call request that UE initiates is transferred to PSAP, namely transfers SIP INVITE to PSAP, wherein carry urgent mark (Emc).

Step 306: follow-up flow process is set up the process of urgent call between PSAP and UE.

In the flow process shown in Fig. 3, after network side (E-CSCF, LRF) receives the emergency call request of UE, determine the location positioning procedure (NI-LR) of initiating to be initiated by network side, i.e. step 302 and step 303.Wherein, step 303 is the processes summarized, and sets up SUPL positioning flow, can adopt the method below shown in Fig. 4 or Fig. 5 between concrete SLP and UE.

Fig. 4 is after SLP receives position enquiring request, sets up a kind of flow chart of SUPL position fixing process with UE, and as shown in Figure 4, SLP initiates SUPL positioning flow by Short Message Service Gateway (SMS GW), WAP gateway (WAP PPG) etc. to UE notice.Specifically comprise the following steps:

Step 400 ~ step 401:SLP receives the position enquiring request that other network entity sends, and sends out SUPL initialization (SUPL INIT) message to sms center, WAP gateway etc.Within the message, SUPL session id, the locate mode of SLP support, the operational mode of SLP is carried.

Step 402 ~ step 403: SUPL INIT is packaged into short message (or WAP message) by sms center (or WAP gateway), and sends to UE.

After step 404:UE receives the SUPL INIT message after packaging, initiatively initiate the process of the user plane bearer foundation for locating to network.Alternatively, TLS secure link tunnel is set up between UE and SLP.

Step 405:UE sends SUPL positioning initialization (SUPL POS INIT) response to SLP.Within the message, the SUPL ability etc. of SUPL session id, UE is carried.

Step 406: follow-up localization message is mutual.

Step 407: location is terminated, SLP sends SUPL to UE and terminates (SUPL END) message.

Or, after SLP receives position enquiring request, adopt the flow process shown in Fig. 5 to initiate position fixing process.Fig. 5 is after SLP receives position enquiring request, sets up the another kind of flow chart of SUPL position fixing process with UE, and as shown in Figure 5, SUPL INIT message is sent to UE by IMS core network element by SLP.Specifically comprise:

Step 500 ~ step 501:SLP receives the position enquiring request that other network entity sends, and sends SUPL initialization (SUPL INIT) message to IMS core network element.Normally, this message is protected in a SIP Message message.

SIP Message is transmitted to UE by step 502:IMS core network element, wherein comprises SUPL INIT message.

After step 503:UE receives the SUPL INIT message be included in SIP Message, initiatively initiate the process of the user plane bearer foundation for locating to network.Further, TLS secure link tunnel is set up between UE and SLP.

Step 504:UE returns 200OK response to IMS core network element.

Step 505:UE sends SUPL positioning initialization (SUPL POS INIT) response to SLP.Within the message, the SUPL ability etc. of SUPL session id, UE is carried.

Step 506: follow-up localization message is mutual.After location is terminated, SLP sends SUPL to UE and terminates (SUPL END) message, to terminate positioning flow.

At present, by the flow process shown in above-mentioned Fig. 3, Fig. 4, Fig. 5, when UE initiates SUPL positioning flow by network side, when SLP determines to send SUPL initial message to UE, because SLP does not know whether UE has SUPL stationkeeping ability, thus positioning flow may be initiated to the UE without SUPL stationkeeping ability, and location response can be postponed owing to repeatedly unsuccessfully attempting.

In particular, under urgent call, this defect is delayed the settling time of urgent call.It is and due to the particularity of urgent call, calling needs to set up within the time fast as far as possible, therefore, existing that to realize the problem that the prolongation urgent call caused by emergency call location method sets up be unallowed.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of method realizing locating, and can ensure the quick foundation of SUPL position fixing process.

Another object of the present invention is to provide a kind of system realizing locating, the quick foundation of SUPL position fixing process can be ensured.

For achieving the above object, technical scheme of the present invention is achieved in that

Realize a method of locating, comprising:

After user face locating platform SLP receives position enquiring request, SLP determines whether UE has SUPL stationkeeping ability;

After determining that UE has SUPL stationkeeping ability, SLP and UE sets up SUPL and connects and the positional information obtaining UE.

Described SLP determines whether UE has SUPL stationkeeping ability and be:

Described SLP is to the SUPL service contracting data of the SUPL service contracting storage entity inquiry UE in system;

There are SUPL service contracting data according to UE in SLP, judges that UE has SUPL stationkeeping ability.

Described SUPL service contracting storage entity is home subscriber server HSS.

The described SUPL service contracting data to the SUPL service contracting storage entity inquiry UE in system are:

Described SLP sends message to the SLP serving common location, the SUPL service contracting data of inquiry UE.

Described SLP is the E-SLP for promptly locating; Described SLP determines whether UE has SUPL stationkeeping ability and be:

When described UE initiates urgent call, the SUPL ability of self is carried in the message, until be delivered to E-SLP; If carry the SUPL ability of UE in message, show that UE has SUPL stationkeeping ability.

When described UE initiates urgent call, the SUPL ability of self is carried in the message, comprises until be delivered to E-SLP:

Described UE is attached to network, sends emergency call request, carry the SUPL ability of UE in this emergency call request to E-CSCF;

E-CSCF sends position enquiring request to LRF; LRF inquires about the positional information of UE to E-SLP; In whole process, the SUPL ability of UE is carried in mutual message, is delivered to E-SLP.

Described SLP is the SLP for common location, or the E-SLP for promptly locating.

Realize a system of locating, at least comprise UE and SLP, wherein,

SLP, after receiving position enquiring request, determines whether UE has SUPL stationkeeping ability, and after determining that UE has SUPL stationkeeping ability, sets up SUPL be connected and the positional information obtaining UE with UE;

UE, is connected and the positional information providing self to SLP for setting up SUPL with SLP.

This system also comprises E-CSCF, after receiving call request, sends position enquiring request by LRF to described SLP, the positional information of inquiry UE.

This system also comprises E-CSCF, after receiving emergency call request that UE sends, sends position enquiring request, require that LRF returns the positional information of UE to LRF; LRF inquires about the positional information of UE to E-SLP; In whole process, the SUPL ability of UE is carried in mutual message, is delivered to E-SLP.

As can be seen from the technical scheme that the invention described above provides, comprise after SLP receives position enquiring request, SLP determines whether UE has SUPL stationkeeping ability, and after determining that UE has SUPL stationkeeping ability, SLP and UE sets up SUPL and connects and the positional information obtaining UE.Pass through the inventive method, when UE initiates SUPL positioning flow by network side, when SLP determines to send SUPL initial message to UE, because SLP has determined that UE has SUPL stationkeeping ability, ensure that the positioning flow of initiation is for the UE's with SUPL stationkeeping ability, avoid owing to repeatedly unsuccessfully attempting and postpone location response, ensure that the quick foundation of SUPL position fixing process.

In particular, under urgent call, avoid the problem that the call set-up time that causes due to the delayed response of emergency call location is extended, ensure that the quick foundation of urgent call.

Accompanying drawing explanation

Fig. 1 is UE accesses the urgent call of IMS network architecture schematic diagram by SAE;

Fig. 2 be there is SUPL ability UE under roaming scence, and schematic diagram mutual between locating platform;

Fig. 3 is under LTE/EPS access, adopts SUPL as positioning service technology, and when UE initiates urgent call, network side initiates the flow chart of location;

Fig. 4 is after SLP receives position enquiring request, sets up a kind of flow chart of SUPL position fixing process with UE;

Fig. 5 is after SLP receives position enquiring request, sets up the another kind of flow chart of SUPL position fixing process with UE;

Fig. 6 is the flow chart that the present invention realizes the method for urgent location;

Fig. 7 is the flow chart that the present invention realizes the first embodiment of urgent location;

Fig. 8 is the flow chart that the present invention realizes the second embodiment of urgent location.

Embodiment

Fig. 6 is the flow chart that the present invention realizes the method for urgent location, as shown in Figure 6, comprises the following steps:

After step 600:SLP receives position enquiring request, determine whether UE has SUPL stationkeeping ability.

In this step, SLP determines whether UE has SUPL stationkeeping ability and following methods can be adopted to realize:

First method, first inquires about the SUPL service contracting data of UE to the SUPL service contracting storage entity (may be HSS) in system.After SLP obtains the SUPL service contracting data of UE, whether there are SUPL service contracting data according to UE, judge whether UE has SUPL stationkeeping ability.If UE exists SUPL service contracting data, then think that UE has SUPL stationkeeping ability.

Second method, when UE initiates urgent call, carries the SUPL ability of self in the message, until be delivered to E-SLP.If carry the SUPL ability of UE in message, show that UE has SUPL stationkeeping ability.

Step 601: after determining that UE has SUPL stationkeeping ability, SLP and UE sets up SUPL and connects and the positional information obtaining UE.

Pass through the inventive method, when initiating SUPL positioning flow by network side, when SLP determines to send SUPL initial message to UE, because SLP has determined that UE has SUPL stationkeeping ability, ensure that the positioning flow of initiation is for the UE's with SUPL stationkeeping ability, avoid owing to repeatedly unsuccessfully attempting and postpone location response, ensure that the quick foundation of SUPL position fixing process.

In particular, under urgent call, avoid the problem of the settling time postponing urgent call.Ensure that the quick foundation of urgent call.

For the inventive method, a kind of system realizing locating also is provided, at least comprises UE and SLP, wherein,

SLP, after receiving position enquiring request, determines whether UE has SUPL stationkeeping ability, and after determining that UE has SUPL stationkeeping ability, sets up SUPL be connected and the positional information obtaining UE with UE;

UE, is connected and the positional information providing self to SLP for setting up SUPL with SLP.

Below in conjunction with embodiment, the inventive method is described in detail.

Fig. 7 is the flow chart that the present invention realizes the first embodiment of urgent location, first embodiment adopts when SLP initiates SUPL positioning flow to UE terminal, whether to contract the method for SUPL business by inquiring about UE to the SUPL service contracting storage entity (may be HSS) in system, SLP is determined, and whether UE supports SUPL stationkeeping ability, and initiate urgent call for UE in the first embodiment to be described, as shown in Figure 7, comprising:

Step 700:UE initiates urgent call, and emergency call request is routed to E-CSCF.

After step 701:E-CSCF receives emergency call request, send position enquiring request by LRF to E-SLP, the positional information of inquiry UE.

After step 702:E-SLP receives position enquiring request, send message to the SLP serving common location, the SUPL service contracting data of inquiry UE.

In this step, in order to initiate SUPL position positioning flow to UE, first, E-SLP needs checking UE whether to have SUPL stationkeeping ability.If UE is current at visit net, then E-SLP inquires about the SUPL subscription data of UE from V-SLP.If UE is current in home network, then E-SLP inquires about the SUPL subscription data of UE from H-SLP.

Step 703 ~ step 704:SLP inquires about the SUPL service contracting data of UE from HSS and returns to E-SLP.

If E-SLP is the SUPL service contracting data of inquiring about UE to V-SLP, so, V-SLP needs again to H-SLP inquiry, and H-SLP transfers to inquire about to HSS.

After step 705:SLP obtains the SUPL service contracting data of UE, whether there are SUPL service contracting data according to UE, determine whether UE supports that SUPL locates: if UE exists SUPL service contracting data, then determine that UE has SUPL stationkeeping ability.If SLP determines that UE has SUPL stationkeeping ability, then SLP sends SUPL initial message (SUPL INIT) to UE.

Step 706: after UE receives SUPL INIT message, returns SUPL positioning initialization message (SUPL POS INIT) to SLP.

Step 707: follow-up SUPL positioning flow, belongs to existing procedure, repeat no more here.

After step 706 and step 707 complete, E-SLP and UE has consulted SUPL algorithm, and establish SUPL and connect, SLP obtains positional information by follow-up flow process from UE thereafter.

Step 708:E-SLP returns SUPL to UE and terminates (SUPL END) message after obtaining the positional information of UE, and returns the position enquiring response of the positional information carrying UE to LRF.

After step 709:LRF obtains the positional information of UE, the PSAP that decision-making is suitable, sends position enquiring response to E-CSCF, comprises position and the PSAP address of UE.Then, emergency call request is routed to the foundation that this PSAP, PSAP and UE complete urgent call by E-CSCF.

In the embodiment shown in fig. 7, for urgent call trigger network side positioning flow, the situation of actual trigger network side positioning flow, and be not only confined to urgent call, also there is other situation, implementation method is the same, those skilled in the art are easy to replace, and repeat no more here.Further, the method for the embodiment shown in Fig. 6, that be not limited only to support process Location Request is E-SLP, if that process Location Request is V-SLP or H-SLP, implementation method is consistent, and those skilled in the art are easy to replace, and repeat no more here.

Fig. 8 is the flow chart that the present invention realizes the second embodiment of urgent location, when what the second embodiment described is UE initiation urgent call, SUPL ability information is carried to IMS network, and passes to the method for E-SLP further.As shown in Figure 8, comprising:

Step 800:UE is attached to network, prepares placement of emergency calls, initiates urgent call to E-CSCF, namely sends emergency call request SIP INVITE to E-CSCF.The SUPL ability of UE is carried in this emergency call request.

After step 801:E-CSCF receives the emergency call request of UE transmission, send position enquiring request to LRF, require that LRF returns the positional information of UE.LRF inquires about the positional information of UE to E-SLP.In whole process, the SUPL ability of UE is carried in mutual message, is delivered to E-SLP.

Step 802 ~ step 805 is prior art, E-SLP with UE sets up SUPL and be connected, and E-SLP is from UE inquiring position information.

Due in step 801, E-SLP obtains the SUPL ability of UE, verifies whether UE supports SUPL stationkeeping ability in the present embodiment without the need to re-using other modes.

Step 806:LRF determines suitable PSAP according to positional information after obtaining the positional information of UE from E-SLP, to E-CSCF home position inquiry response, carries positional information and the PSAP address of UE.

After step 807:E-CSCF obtains PSAP, the emergency call request that UE initiates is routed to this PSAP.

Step 808: in subsequent process, completes the foundation of urgent call between PSAP and UE.

The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention, and all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (6)

1. realize a method of locating, it is characterized in that, comprising:

Network side initiates Location Request, and after user face locating platform SLP receives position enquiring request, SLP determines whether UE has user face positioning service SUPL stationkeeping ability;

After determining that UE has SUPL stationkeeping ability, SLP and UE sets up SUPL and connects and the positional information obtaining UE;

Wherein, described SLP determines whether UE has SUPL stationkeeping ability and comprise:

Described SLP is to the SUPL service contracting data of the SUPL service contracting storage entity inquiry UE in system; There are SUPL service contracting data according to UE in SLP, judges that UE has SUPL stationkeeping ability;

Or described UE is attached to network, sends emergency call request to emergency call session controlling functions E-CSCF, in this emergency call request, carry the SUPL ability of UE; E-CSCF sends position enquiring request to position requests function LRF; LRF inquires about the positional information of UE to E-SLP; In whole process, the SUPL ability of UE is carried in mutual message, is delivered to E-SLP; If carry the SUPL ability of UE in message, show that UE has SUPL stationkeeping ability.

2. method according to claim 1, is characterized in that, described SUPL service contracting storage entity is home subscriber server HSS.

3. method according to claim 1, is characterized in that, the described SUPL service contracting data to the SUPL service contracting storage entity inquiry UE in system are:

Described SLP sends message to the SLP serving common location, the SUPL service contracting data of inquiry UE.

4. method according to claim 1, is characterized in that, described SLP is the SLP for common location, or the E-SLP for promptly locating.

5. realize a system of locating, it is characterized in that, at least comprise network side, UE and SLP, wherein,

Network side, for initiating Location Request;

SLP, after receiving position enquiring request, determines whether UE has SUPL stationkeeping ability, and after determining that UE has SUPL stationkeeping ability, sets up SUPL be connected and the positional information obtaining UE with UE;

UE, is connected and the positional information providing self to SLP for setting up SUPL with SLP;

Wherein, described SLP determines whether UE has SUPL stationkeeping ability and comprise:

Described SLP is to the SUPL service contracting data of the SUPL service contracting storage entity inquiry UE in system; There are SUPL service contracting data according to UE in SLP, judges that UE has SUPL stationkeeping ability;

Or described UE is attached to network, sends emergency call request to emergency call session controlling functions E-CSCF, in this emergency call request, carry the SUPL ability of UE; E-CSCF sends position enquiring request to position requests function LRF; LRF inquires about the positional information of UE to E-SLP; In whole process, the SUPL ability of UE is carried in mutual message, is delivered to E-SLP; If carry the SUPL ability of UE in message, show that UE has SUPL stationkeeping ability.

6. system according to claim 5, is characterized in that, this system also comprises E-CSCF, after receiving call request, sends position enquiring request by LRF to described SLP, the positional information of inquiry UE.