CN101801086A - Method and system for locating user - Google Patents
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- CN101801086A CN101801086A CN 201010141599 CN201010141599A CN101801086A CN 101801086 A CN101801086 A CN 101801086A CN 201010141599 CN201010141599 CN 201010141599 CN 201010141599 A CN201010141599 A CN 201010141599A CN 101801086 A CN101801086 A CN 101801086A
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Abstract
The invention discloses a method and a system for locating a user. The method comprises the following steps that: an MME (mobile management entity) determines to acquire the geographical location information of target UE (user equipment); the MME sends a request of location services to an MME for providing services for the target UE; the MME for providing services for the target UE acquires the absolute location information of the target UE and returns the absolute location information thereof to the MME; the MME sends the absolute location information thereof to a geographic information server; the geographic information server converts the absolute location information of the UE into the corresponding geographical location information; and the MME receives the geographical location information of the target UE, which is returned by the geographic information server. The technical scheme of the invention dispenses with the introduction of new protocol for supporting and achieves the simple process.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly relate to a kind of method for positioning user and system.
Background technology
In Long Term Evolution (LTE, Long Term Evolution) system, user positioning technology provides a kind of and has adjudicated the method for subscriber equipment (UE) geographical position and speed according to measuring wireless signal.User positioning technology has many different application, and for example, the grouping system of evolution (EPS) inside, value-added network service, UE or third party's service can be used the geographical location information that obtains by the family location technology.
At present, the localization method in the evolved universal terrestrial radio access network (E-UTRAN) comprises: the cell ID of Global Navigation Satellite System (GNSS) method, downlink positioning method and the enhancing of network assistance (cell ID) method.Also support to use the mixed method of above-mentioned multiple locate mode.
The structure chart that UE location among Fig. 1 prior LTE system EPS is adopted.As shown in Figure 1, mobile management entity (MME) from another entity (for example, UE, base station eNB or GMLC GMLC) receive location service request about specific objective UE, when perhaps MME oneself decision is for certain location-based service of specific objective UE initialization (for example carrying out the IMS urgent call of UE), send the Location based service center (E-SMLC, Enhanced Serving Mobile Location Centre) of location service request to evolution.E-SMLC handles location service request, comprising: transmit auxiliary data and help the location of assisting based on UE and/or UE to object UE, perhaps object UE is located.Afterwards.E-SMLC home position service result (indication that has been delivered to UE as location estimation and/or all auxiliary datas to UE) is given MME.Under the situation of non-MME entity requests location-based service, MME returns to this entity with the location-based service result.
With reference to figure 1, the positioning service technology in the prior LTE system relates to following aspect:
1, the interface that relates to of positioning service
Interface between LTE-Uu interface: EU and the eNB is as a transmission link use of TLE location protocol;
Interface between S1 interface: eNB and the MME is to all relevant transparent procedures in UE location, a transmission link as the LTE location protocol;
Interface between SLs interface: E-SMLC and the MME, transparent to the relevant position fixing process relevant of all UE with eNB, as a transmission link use of LTE location protocol (LPP, LTE PositioningProtocol) and LPPa agreement.
2, the entity that relates to of positioning service
UE: for based on up UE localization method, UE sends needed signal, can be to measuring from the signal in E-UTRAN and other source (as GNSS); The measurement of carrying out will be by selected localization method decision.
ENB: for location estimation provides measurement result, and be object UE measurement wireless signal, with these measuring-signals notices E-SMLC.
SLP (SUPL Location Platform): i.e. SUPL locating platform, be responsible for positioning security user plane (SUPL, the Secure User PlaneLocation) entity of whole user's face location.
E-SMLC: the diverse location service of object UE is supported in management, comprises the location of UE and sends auxiliary data to UE; Can be mutual with the service eNB of UE, so that obtain the location survey of UE, comprise the out-hole run of eNB execution and the down-run survey that UE carries out.
3, the process that relates to of positioning service
1) a:UE in the NAS rank to certain location-based service of serving MME request; Or,
Certain entity (as GMLC) among the b:EPC is to certain location-based service (as the location) of MME request target UE; Or,
C: the decision of the serving MME of object UE need certain location-based service (as, in order to carry out urgent call in the position of searching UE);
2) MME is transmitted to E-SMLC with location service request;
3) a:E-SMLC startup service eNB is searched UE position process (being to obtain location survey or auxiliary data for example); Or,
B: in above-mentioned steps 3) on a basis or replace step 3) a, E-SMLC to start the position process of searching (for example, be to obtain location estimation or location survey, or give UE) of UE in order to transmit location assistance data;
4) E-SMLC provides location service response to MME, comprises result's (for example, location estimation of success or failure indication and UE) of all needs;
5) a: if carried out step 1) a, MME home position service response is given UE, comprises needed result (for example, the position result of UE);
B: if carried out step 1) b, MME home position service response is given the PEC entity, comprises needed result (for example, the position negative pole of UE);
C: if carried out step 1) c, MME uses the location service response in the step 4) to assist the service of the step 1) c that sets out (for example, can be provided to the relevant location estimation of urgent call of GMLC).
As seen, the design of existing E-UTRAN stationkeeping ability comprises localization method, agreement and process, can adopt the ability of having supported among UTEAN and the GERAN, perhaps creates new principle.Be that location technology in the present LTE system standard all needs to introduce new location protocol support, for example, use LPP1 from EU to eNB to connect the design of protocol that is connected with LPP2 from eNB to E-SMLC, perhaps use UE to LPP connection end to end between the E-SMLC.
In sum, the realization of existing location technology need be introduced new agreement support, and implementation procedure is numerous and diverse.
Summary of the invention
The invention provides a kind of method for positioning user, this method need not to introduce new agreement support, and implementation procedure is simple.
The present invention also provides a kind of user location system, and this system need not to introduce new agreement support when realizing that the user locatees, and implementation procedure is simple.
To achieve these goals, technical scheme of the present invention is achieved in that
The invention discloses a kind of method for positioning user, this method comprises:
The geographical location information of target UE UE is obtained in the mobile management entity MME decision;
Described MME sends location service request to the MME that service is provided for object UE; The absolute location information that provides the MME of service to obtain object UE for object UE, and return to described MME;
Described MME sends to geographic information server with the absolute location information of object UE; Described geographic information server converts the absolute location information of UE to corresponding geographical location information;
The geographical location information of the object UE that described MME reception geographic information server returns.
The invention also discloses a kind of user's fixed system, this system comprises: MME, for object UE provides the MME and the geographic information server of service, wherein,
MME is used to determine to obtain the geographical location information of object UE; Be used for sending location service request, be received as object UE and provide the absolute location information of the object UE that the MME of service returns to the MME that service is provided for object UE; Be used for the absolute location information of object UE is sent to geographic information server, and receive the geographical position letter of the object UE that geographic information server returns;
For object UE provides the MME of service, be used for when the location service request that receives from described MME, obtaining the absolute location information of object UE, and returning to described MME;
Geographic information server is used for when the absolute location information that receives from the object UE of described MME, convert the absolute location information of object UE to corresponding geographical location information after, return to described MME.
Have as seen above-mentioned, this MME of the present invention is when the geographical location information of object UE is obtained in decision, send location service request to the MME that service is provided for object UE, be received as object UE and provide the absolute location information of the object UE that the MME of service returns, the absolute location information of object UE is sent to geographic information server, the technical scheme of the geographical location information of the object UE that the reception geographic information server returns, with respect to existing location technology, do not need to introduce new agreement (LPP) support, implementation procedure is simple.
Description of drawings
The structure chart that UE location among Fig. 1 prior LTE system EPS is adopted;
Fig. 2 is the flow chart of a kind of method for positioning user in the embodiment of the invention;
Fig. 3 is the system construction drawing signal of the user's targeting scheme in the embodiment of the invention;
Fig. 4 is based on the flow chart that structure shown in Figure 3 realizes the user location;
Fig. 5 is the principle schematic of OTDOA location technology;
Fig. 6 is the composition structure chart of a kind of user's fixed system in the embodiment of the invention.
Embodiment
Fig. 2 is the flow chart of a kind of method for positioning user in the embodiment of the invention.As shown in Figure 2, this method comprises:
In such scheme, introduced geographic information server, this geographic information server provides geographic information services.Such scheme does not need to introduce new agreement (LPP) support with respect to existing location technology, and implementation procedure is simple.
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with specific embodiment.
Fig. 3 is the system construction drawing signal of the user's targeting scheme in the embodiment of the invention.As shown in Figure 3, the difference of this networking and existing networking is to have increased newly a network element---geographic information server.This geographic information server externally has two interfaces: geographical information query interface and geographical information query be response interface as a result.This geographic information server is exactly newly to have added a server for whole LTE grid, does not need existing network configuration is changed and can be realized.
Fig. 4 is based on the flow chart that structure shown in Figure 3 realizes the user location.As shown in Figure 4, may further comprise the steps:
Step 401, UE sends location service request message about object UE in the application layer rank to the MME that service is provided for self.
Here, distinguish for convenience, will provide the MME of service to be called " request MME ", will be called " serving MME " for object UE provides the MM of service for the UE of this initiation request.
Step 402, request MME give home subscriber server HSS in the application layer rank with the location service request forwards.
Step 403, the sign of the serving MME that request MME reception HSS returns.
How HSS is prior art according to the sign that location service request message is searched serving MME in this step, is not describing in detail here.
Step 404, request MME sends location service request about object UE according to the sign of serving MME to serving MME.
Step 405, serving MME can be observed to the object UE initiation by the application layer rank and reach time difference (OTDOA, Observed Time Difference Of Arrival) measurement configuration.
Step 406, serving MME receives the measurement report from object UE, comprises the absolute location information of UE in this measurement report.
Here, the absolute location information of object UE refers to the longitude and latitude positional information of UE.
Step 407, serving MME sends to request MME in the application layer rank with the absolute location information of object UE.
Step 408, request MME sends to geographic information server in the application layer rank with the absolute location information of object UE, as by the application protocol gateway mode etc.
Step 409, geographic information server return to request MME after the absolute location information of object UE being converted to the geographical location information of object UE in the application layer rank.
The geographical location information here refers to which country, province, city object UE specifically be positioned at, even points out in which zone in city in more detail or information such as street.
Step 410, request MME returns the geographical location information of object UE to the UE that initiates location service request in the application layer rank.
In the embodiment shown in fig. 4, initiate location service request by UE to MME about object UE.Equally, in other embodiments of the invention, also can be other entities in the system, initiate position requests as GMLC to MME about object UE, this moment, MME was after obtaining the geographical location information of object UE from geographic information server, returned to the entity of the request of initiation.Perhaps, in one embodiment of the invention, MME also can need obtain the positional information of certain object UE in the decision of application layer rank, for example, carries out the situation of urgent call for the position of searching object UE.
In the embodiment shown in fig. 4, request MME is two different entities with serving MME, but is same entity asking MME and serving MME in some cases, and at this moment, step 402,403 and 404 is omitted.
In the step 405 and 406 of embodiment shown in Figure 4, serving MME is measured the absolute location information that object UE is obtained in configuration by sending OTDOA.The OTDOA technology is a prior art, here simply illustrated: OTDOA (Observed Time Difference OfArrival) is a kind of locate mode that has been applied to 3G network, similar localization method is also arranged in the GSM network, be called E-OTD (Enhanced Observed TimeDifference).Basic OTDOA measurement is that UE observes SFN-SFN Observed TimeDifference, these measure other information relevant with the transmitting terminal geographical position and difference (RTD correlation time of the actual transmission of downstream signal, Relative Time Difference) together, be used to the speed (optional) of calculating location estimation and UE.The line with constant difference that UE may be arranged in (as the hyperbola of Fig. 5) has been described in the OTDOA measurement of each descending transmission.The position of UE is by the hyperbola crosspoint decision of at least two couples of eNB.The precision of location estimation depends on the relative position of the eNB of the precision of time measurement and participation, also is subjected to the influence of multipath radio transmission.Be that example is carried out simple declaration below with Fig. 5.
Fig. 5 is the principle schematic of OTDOA location technology.As shown in Figure 5, suppose with eNB-a to be reference, it is poor with respect to the down-bound pilot frequency signal time of reception of eNB-a that UE obtains eNB-b according to pilot tone, multiply by that the light velocity can obtain eNB-a and eNB-b is poor to the propagation distance of UE, is the hyperboloid of benchmark thereby obtain with eNB-a and eNB-b.Can obtain equally with eNB-a and eNB-c is another hyperboloid of benchmark.Two bi-curved boundaries are exactly the position of UE.Actual location estimation is calculated needs to consider many situations to base station (more than 3 pairs) location.Generally, the number of base stations that UE measures is many more, and certainty of measurement is high more, and positioning performance improves obvious more.
In the step 405 and step 406 of embodiment shown in Figure 4, serving MME obtains measurement report from object UE.In other embodiments of the invention, also can do the OTDOA measurement by " service eNB " that service is provided for object UE reports.The corresponding flow process of this moment is: serving MME is initiated OTDOA to object UE and is measured configuration, then object UE reports service eNB with self with respect to the relative position information of service eNB, owing to all remain with the longitude and latitude positional information (being the absolute location information of base station self) of self among each eNB, therefore service eNB can calculate the absolute location information of object UE with respect to self relative position information according to longitude and latitude positional information and the object UE of self, is sent the measurement report of the absolute location information that comprises object UE then to serving MME by service eNB.
From the foregoing description as can be seen, combined closely the whole network IPization feature of LTE system of the localization method among the present invention is positioned to a kind of service function with the UE positioning function, offers the whole network user and associated mechanisms.Positioning service is equal to generic services as Email (Email) service, such benefit is to have simplified in the network each entity and interface to the agreement support of this function service, be positioning service for most network entities and interface transparence, do not need to participate in the extra support of function.
Fig. 6 is the composition structure chart of a kind of user's fixed system in the embodiment of the invention.As shown in Figure 6, this system comprises: MME 601, for object UE provides the MME 602 and the geographic information server 603 of service, wherein,
For object UE provides the MME 602 of service, be used for when the location service request that receives from described MME601, obtaining the absolute location information of object UE, and returning to described MME 601;
In Fig. 6, described MME 601 is used for when self needing the geographical location information of object UE, and the geographical location information of object UE is obtained in decision; Perhaps, be used for when the location service request that receives from the geographical location information of the acquisition request object UE of other entities, the geographical location information of object UE is obtained in decision, and behind the geographical location information of the object UE that the reception geographic information server returns, further return the geographical location information of object UE to described other entities.
As shown in Figure 6, this system further comprises: HSS 604.Described MME 601 before sending location service request to the MME 602 that service is provided for object UE, is further used for location service request is sent to HSS 604, and the sign of the MME of service is provided to provide for object UE from HSS 604.HSS 604, are used for being returned as the sign that object UE provides the MME 602 of service according to this location service request to this MME 601 when the location service request that receives from MME 601.
In Fig. 6, described for UE provides the MME 602 of service, be used for initiating the OTDOA configuration to object UE, and the absolute location information of the object UE returned of receiving target UE; Perhaps, described for UE provides the MME 602 of service, be used for initiating the OTDOA configuration, and be received as object UE and provide the absolute location information of the object UE that the eNB of service sends to object UE; Wherein, when the described MME 602 that service is provided for UE after object UE is initiated the OTDOA configuration, object UE sends self relative position information to the eNB that service is provided for this object UE, and sends to the MME 602 that service is provided for object UE after converting the relative position information of object UE to absolute location information by the eNB that service is provided for this object UE.
All communicate by the IP routing mode between each network element in system shown in Figure 6 in the application layer rank.
As seen from the above-described embodiment, owing to,, and do not need extra agreement support and signaling support so any network element can pass through IP routing mode and gateway mode intercommunication based on complete IP network.
In sum, this MME of the present invention is when the geographical location information of object UE is obtained in decision, send location service request to the MME that service is provided for object UE, be received as object UE and provide the absolute location information of the object UE that the MME of service returns, the absolute location information of object UE is sent to geographic information server, the technical scheme of the geographical location information of the object UE that the reception geographic information server returns, with respect to existing location technology, do not need to introduce new agreement (LPP) support, implementation procedure is simple.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. a method for positioning user is characterized in that, this method comprises:
The geographical location information of target UE UE is obtained in the mobile management entity MME decision;
Described MME sends location service request to the MME that service is provided for object UE; The absolute location information that provides the MME of service to obtain object UE for object UE, and return to described MME;
Described MME sends to geographic information server with the absolute location information of object UE; Described geographic information server converts the absolute location information of UE to corresponding geographical location information;
The geographical location information of the object UE that described MME reception geographic information server returns.
2. method according to claim 1 is characterized in that,
Described MME is when self needing the geographical location information of object UE, and the geographical location information of object UE is obtained in decision;
Perhaps,
Described MME is when the location service request that receives from the geographical location information of the acquisition request object UE of other entities, and the geographical location information of object UE is obtained in decision; And described MME further returns the geographical location information of object UE to described other entities behind the geographical location information of the object UE that the reception geographic information server returns.
3. method according to claim 1 is characterized in that, before the MME that service is provided for object UE sent location service request, this method further comprised at described MME:
Described MME sends to home subscriber server HSS with location service request, and the sign of the MME of service is provided to provide for object UE from HSS.
4. method according to claim 1 is characterized in that, the described absolute location information that provides the MME of service to obtain object UE for object UE comprises:
The MME that service is provided for object UE initiates can be observed to object UE and reaches time difference OTDOA configuration, and the absolute location information of the object UE returned of receiving target UE;
Perhaps, for providing the MME of service, object UE initiates the OTDOA configuration to object UE; Receive relative position information for object UE provides the eNB of service, and send to the MME that service is provided for object UE after converting this relative position information to absolute location information from object UE.
5. according to each described method in the claim 1 to 4, it is characterized in that, all communicate by the IP routing mode between each above-mentioned network element in the application layer rank.
6. user's fixed system is characterized in that, this system comprises: MME, for object UE provides the MME and the geographic information server of service, wherein,
MME is used to determine to obtain the geographical location information of object UE; Be used for sending location service request, be received as object UE and provide the absolute location information of the object UE that the MME of service returns to the MME that service is provided for object UE; Be used for the absolute location information of object UE is sent to geographic information server, and receive the geographical position letter of the object UE that geographic information server returns;
For object UE provides the MME of service, be used for when the location service request that receives from described MME, obtaining the absolute location information of object UE, and returning to described MME;
Geographic information server is used for when the absolute location information that receives from the object UE of described MME, convert the absolute location information of object UE to corresponding geographical location information after, return to described MME.
7. system according to claim 6 is characterized in that,
Described MME is used for when self needing the geographical location information of object UE, and the geographical location information of object UE is obtained in decision; Perhaps, be used for when the location service request that receives from the geographical location information of the acquisition request object UE of other entities, the geographical location information of object UE is obtained in decision, and behind the geographical location information of the object UE that the reception geographic information server returns, further return the geographical location information of object UE to described other entities.
8. system according to claim 6 is characterized in that this system further comprises: HSS;
Described MME before sending location service request to the MME that service is provided for object UE, is further used for location service request is sent to HSS, and the sign of the MME of service is provided to provide for object UE from HSS;
HSS is used for being returned as the sign that object UE provides the MME of service to this MME when the location service request that receives from MME.
9. system according to claim 6 is characterized in that,
Described for UE provides the MME of service, be used for initiating the OTDOA configuration to object UE, and the absolute location information of the object UE returned of receiving target UE;
Perhaps,
Described for UE provides the MME of service, be used for initiating the OTDOA configuration, and be received as object UE and provide the absolute location information of the object UE that the eNB of service sends to object UE; Wherein, when the described MME that service is provided for UE after object UE is initiated the OTDOA configuration, object UE sends self relative position information to the eNB that service is provided for this object UE, and sends to the MME that service is provided for object UE after converting the relative position information of object UE to absolute location information by the eNB that service is provided for this object UE.
10. according to each described system in the claim 6 to 9, it is characterized in that, all communicate by the IP routing mode between each network element in this system in the application layer rank.
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Application publication date: 20100811 |