KR20130100744A - Method for providing location of mobile station in wireless communication system - Google Patents

Method for providing location of mobile station in wireless communication system Download PDF

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Publication number
KR20130100744A
KR20130100744A KR1020130022262A KR20130022262A KR20130100744A KR 20130100744 A KR20130100744 A KR 20130100744A KR 1020130022262 A KR1020130022262 A KR 1020130022262A KR 20130022262 A KR20130022262 A KR 20130022262A KR 20130100744 A KR20130100744 A KR 20130100744A
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South Korea
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location
mobile station
lbs
gps
service
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KR1020130022262A
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Korean (ko)
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박지수
이숙진
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한국전자통신연구원
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/10—Interfaces between hierarchically different network devices between terminal device and access point, i.e. wireless air interface
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds

Abstract

PURPOSE: A method of providing location information of a mobile station in a radio communications system is provided to provide a location based service while lightly maintaining a software function of the mobile station. CONSTITUTION: An advanced mobile station (AMS) (100) calculates a global positioning system (GPS) pseudo range using GPS assistive information. The AMS transmits a calculation result to a location agent (LA) (221). The LA transmits the GPS pseudo range to each of a visited-network location server (VLS) (310) and a home-network location server (HLS) (410). The LA transmits a location service end message to each of the VLS and the HLS. Each of the VLS and the HLS calculates the location of the AMS using the GPS pseudo range. Each of the VLS and the HLS transmits the calculation result to a location service requestor.

Description

METHOD FOR PROVIDING LOCATION OF MOBILE STATION IN WIRELESS COMMUNICATION SYSTEM}

The present invention relates to a method for providing location information of a target mobile station in a wireless communication system.

[references]

[1] Std 802.16m-2011, "IEEE Standard for Local and metropolitan area networks Part 16: Air Interface for Broadband Wireless Access Systems Amendment 3: Advanced Air Interface" 2011-05-06.

[2] WiMAX Forum WMF-T33-110-R015v02, "WiMAX Forum Network Architecture: Protocols and Procedures for Location Based Services," 2011-11-14.

[3] Open Mobile Alliance TM (OMA), "Secure User Plane Location (SUPL) V2.0 Enabler Release Package".

[4] Open Mobile Alliance TM (OMA), "OMA Management Object for SUPL", Version 2.0, 2008-04-30.

[5] "A Presence-based GEOPRIV Location Object Format", RFC 4119, Peterson, December 2005.

[6] "GEOPRIV PIDF-LO Usage Clarification, Considerations and Recommendations", RFC 5491, Winterbottom, Thomson, and Tschofenig, March 2009.

[7] "GML 3.1.1 PIDF-LO Shape Application Schema for use by the Internet Engineering Task Force (IETF)", Candidate OpenGIS Implementation Specification 06-142r1, Version: 1.0, Thomson and Reed, April 2007.

[8] "Revised Civic Location Format for Presence Information Data Format Location Object (PIDF-LO)", RFC 5139, Thomson and Winterbottom, February 2008.

[9] "Providing Satellite Navigation Assistance Data using HELD", draft-thomson-geopriv-draft-thomson-geopriv-held-grip-01, Thomson and Winterbottom, January 2009.

[10] "HTTP Enabled Location Delivery (HELD)", draft-ietf-geopriv-http-location-delivery-13, M. Barnes, J. Winterbottom, M. Thomson, B. Stark, February 2009.

[11] "HELD Protocol Context Management Extensions", draft-winterbottom-geopriv-held-context-03, J. Winterbottom, H. Tschofenig, M.Thomson, September 2008.

In the following description, for convenience of explanation, the n th reference document is referred to as [n].

Location-Based Service (LBS), which estimates the location of a mobile station in a broadband wireless communication system, generally uses RF radio environment information, which is the base station cell information of a wireless communication network, to measure the location of a mobile station. Mobile network management base using satellite navigation system positioning using a network managed system (GPS) that calculates position by software and a satellite navigation system receiver (eg, a GPS (Global Positioning System) receiver, etc.) Mobile Managed). Its use is, for example, GPS-based positioning in areas where GPS is received (usually outdoors) to deliver location information to location servers without the help of control messages from wireless networks, and locations of wireless networks in GPS ranges (usually indoors). The LBS service is provided using a control message of a wireless communication network by performing network type positioning using information.

In general, the GPS positioning method using a wireless communication network performs a location calculation process between a mobile station having a GPS receiver and a location server (LS) installed in the mobile communication network. Here, the position of the mobile station is determined by sending and receiving a message including GPS positioning information or GPS positioning information through a direct connection protocol between the mobile station and the location server LS.

In detail, the positioning method can be divided into MS-Assisted and MS-Based methods. In the MS-Assisted method, when satellite information capable of receiving a signal is received from a mobile station and transmitted to the location server LS, the location server LS performs positioning using the corresponding information. The MS-Based method refers to a method of positioning satellites stored in a location server (LS) or a satellite information providing server to a mobile station from a location server (LS) at the request of a mobile station, and using the mobile station to perform location positioning.

Representative location-based measurement information providing services, such as friend finder, my location query, phone navigation services, and provides a child's peace of mind services.

Today, the LBS is evolving into a Real Time Location System (RTLS) that performs positioning calculations in real time at each location in positioning and makes the results available for various purposes.

In addition to this, more real-time public safety and emergency response services are available, such as emergency alert services for transmitting alert information such as emergency / emergency situations recognized by the mobile station to the uplink (UL). Location-based technology is evolving to provide the various services required.

The mobile station transmits information data for such a service (e.g., measured LBS measurement or emergency alert based on LBS) to the base station through uplink. Resource is allocated and the mobile station transmits the information data uplink to the base station through the allocation information.

However, in a conventional broadband wireless communication system, a user plane LBS protocol (e.g., WiMAX LBS Protocol [WLP] [2]) between a mobile station and a location server (LS), and a secure user plane location tracking protocol (SUPL: Secure User) If you need to send and receive mobile station location information using Plane Location or HTTP Enabled Location Delivery (HELD) [3] to [11], etc., the R2 interface to the mobile station (a wireless interface for connecting the mobile station to the core service network). User plane LBS protocol (e.g., WLP, SUPL or HELD) must be installed to support this. This causes the function of the mobile station to be heavier, and can be rather burdensome for a simple mobile station device applied to machine-to-machine (M2M). In particular, when there are many mobile stations using the user plane LBS interface R2, the use of radio resources via the R1 air interface (the radio interface for connection between the mobile station and the service base station) is more demanding. That is, in an environment where a plurality of general wireless traffic users and a user of a service providing a plurality of location services are mixed, traffic generation on the R1 air interface for location service may be increased.

The problem to be solved by the present invention is to provide a method for providing location-based services while minimizing the amount of radio resources used and keeping the software function of the mobile station light.

According to an embodiment of the present invention, a method of providing location information is provided. The method for providing location information includes: requesting, by a location service requester, a location server of a location of a mobile terminal; Transmitting, by the location server, a location service initialization message to a base station including an agent using a secure user plane location tracking protocol; The agent sending a location service start message to the location server including an identifier of the base station; Determining, by the location server, GPS assistance information using the received identifier of the base station, and transmitting the GPS assistance information to the agent; Transmitting, by the agent, the GPS assistance information to the mobile terminal; Calculating, by the mobile terminal, the GPS pseudorange using the GPS assistance information and transmitting the result to the agent; Sending, by the agent, the GPS pseudorange to the location server and sending a location service termination message to the location server; And calculating, by the location server, the location of the mobile terminal using the GPS pseudorange and transmitting the result to the location service requester.

According to an embodiment of the present invention, a user plane LBS protocol (eg, WLP, SUPL, HELD, etc.) is installed in an LBS user-plane protocol agent (LUPA) of a base station instead of a mobile station. User plane LBS messages are exchanged between the LUPA and the location server (LS), and only LBS location values (eg, GPS pseudo ranges) are exchanged between the mobile station and the LUPA of the service base station. Through this, it is possible to reduce the direct LBS message exchanged between the mobile station and the location server (LS), and to reduce the amount of radio resources used on the air interface.

In addition, since there is no need to mount a user plane LBS protocol (e.g., WLP, SUPL, HELD, etc.) to the mobile station for adaptation between the mobile station and the location server (LS), it is possible to reduce the burden of mounting costs for the mobile station, Can lighten the software function.

1 illustrates a functional reference model for LBS services in a WiMAX network.
2 illustrates a functional reference model for LBS service according to an embodiment of the present invention.
3 is an LBS service providing procedure according to an embodiment of the present invention, showing a user plane LBS service providing procedure when using the HELD protocol.
Figure 4 is a LBS service providing procedure according to an embodiment of the present invention, a diagram showing a user plane LBS service providing procedure when using the SUPL protocol.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

In the present specification, a mobile station (MS: Mobile Station or AMS: Advanced Mobile Station) includes a terminal, a mobile terminal (MT), a subscriber station (SS), and a portable subscriber station (PSS). It may also refer to a user equipment (UE), an access terminal (AT), and the like, and may include all or some functions of a mobile terminal, a subscriber station, a portable subscriber station, a user device, and the like.

In the present specification, a base station (BS: Base Station or ABS: Advanced Base Station) is an access point (AP), a radio access station (RAS), a radio access station (RAS), a Node B (Node B), a base transceiver station (BTS) It may refer to a transceiver station, a mobile multihop relay (MMR) -BS, or the like, and may include all or a part of functions such as an access point, a wireless access station, a node B, a transceiver base station, and an MMR-BS.

For convenience of description, a technology for LBS service will be described below using a WiMAX [2] based system including IEEE Std 802.16m [1] as an example.

1 is a diagram illustrating a functional reference model for an LBS service in a WiMAX network. Specifically, FIG. 1 illustrates an LBS functional reference model between an access service network (ASN) and a core service network (CSN: Core Service Network or Connectivity Service Network, 300, 400) in a WiMAX network.

The access service network (ASN) 200 includes a mobile station (AMS) 100, a base station (ABS, 210) and an access service network gateway (ASN-GW).

1 illustrates an LBS functional reference model using logical entities of a WiMAX network and LBS functional entities 110, 211, 251, 310, and 410 for LBS service. In FIG. 1, the functional model structure for the LBS service is based on a WiMAX network functional reference model, and supports a method and procedure for determining a location of a control plane and a user plane.

The logical entities of the WiMAX network are R1, R2, R3, which are reference points for the interconnection between the access service network (ASN, 200), the core service network (CSN, 300, 400), and these logical LBS entities. R5, R6 air interface.

The functional entities for the LBS service include mobile station (AMS) 100, location requestor (LR) 110, 510, location agent (LA) 211, location controller (LC), and location controller (LC). Location Server (LS: Location Server, 310, 410). Location servers LS, 310, and 410 are based on V-CSN (Visited-CSN, 300) or H-CSN (Home-CSN, 400), and VLS (Visited-network LS, 310) and HLS (Home-network LS, 410). Here, the location agent (LA) 211 and the location controller (LC) 251 are functional entities for the control-plane LBS service, and the location servers LS, 310, and 410 manage both control plane and user plane LBS services. Provides protocols and interfaces for

Location requestors (LR, 110, 510), which are functional entities for the LBS service, are entities (or functional elements) that trigger a request for location information of a specific mobile station. It is located in the network 500 for the service.

The location agent (LA) 211, which is a functional entity for the LBS service, is located in the base station (ABS) 210, measures the location of the mobile station, collects the location measurement data information, and the location controller through the R6 interface. The measurement data is reported to (LC, 251).

The position controller LC, 251, which is a functional entity for the LBS service, stores the position measurements of the mobile station AMS 100, which are required for the position determination of the position servers LS, 310, and 410 together with related information. 310, 410 performs a function provided, and is located in the ASN-GW 250.

The location servers LS, 310, and 410, which are functional entities for the LBS service, determine the location of the mobile station 100 and provide location information. The location servers LS, 310, and 410 may use a location measurement method using triangulation measurements and a base station identifier (BS-ID), a location measurement method using a GPS measurement of a mobile station, or the two location measurements. The location of the mobile station 100 is determined by a number of methods, including a mixed method of measurement. The location server LS, 310, 410 triggers LBS service processing originating from the network by an external request, and is located in the core service network CSN 300, 400, which is an LS function entity.

The mobile station (AMS) 100, a functional entity for the LBS service, executes various procedures related to the LBS service. The location requestor (LR, 110) in the mobile station (AMS) 100 is specific to the location server (LS, 310, 410). Performs an LBS trigger function that requires location information of the mobile station. The mobile station (AMS) 100 may transmit GPS pseudo ranges to the location servers LS, 310, and 410, and may request GPS assistance data from the location servers LS, 310, and 410. Can be. In addition, the mobile station (AMS) 100 may report the WiMAX scan report data to the location servers LS, 310, and 410, and may use the location agent LA, of the service base station 210, using the R1 interface. 211). If the mobile station (AMS) 100 can determine its location regardless of whether or not it receives help from the location server (LS, 310, 410) or location agent (LA, 211), location server (LS, 310, 410) Alternatively, location information may be reported to another application layer.

The reference point R1 is a radio interface that forms a protocol and a procedure by a radio interface standard through the PHY layer and the MAC layer, and corresponds to the IEEE Std 802.16m [1] radio standard.

In a broadband wireless communication system based on the IEEE Std 802.16m [1], the mobile station (AMS) 100 is in an access mode state in which a unique TSTID (Temporary Station Identifier) is granted through an initial network entry process. Through this, the STID (Station Identifier) is given and the traffic data is transmitted and received between the mobile station (AMS, 100) and the base station 210 in the uplink (UL: Up Link) or downlink (DL) through the STID It stays in Connected mode. Specifically, in order for the mobile station (AMS) 100 and the base station 210 to transmit and receive uplink data using resources allocated to uplink (UL), the UL basic assignment A-MAP IE By transmitting the resource allocation information to the STID (or TSTID) through the control signal it is possible to transmit and receive data in the uplink. In addition, a method for allocating a resource to an anonymous mobile station that does not have the STID (or TSTID) in the connected mode may be performed by using a ranging preamble or random access preamble (RP) code for random access. An uplink resource allocation method for transmitting and receiving procedure is used. In this case, in the IEEE Std 802.16m [1] based system, uplink resource allocation information is provided to the mobile station 100 through a CDMA allocation A-MAP IE (CDMA allocation A-MAP IE) control signal. The base station 210 transmits and receives a message in uplink.

A mobile station (AMS) 100 in a connected mode that has completed an initial network access process including a mobile station registration process may transmit and receive data in uplink and downlink using a unique STID. On the other hand, the mobile station (AMS) 100, which is transitioned to the idle mode state through the deregistration of the mobile station, uses a DID (Deregistration Identifier) to distinguish the idle mode state, and the mobile station 100 is set to Privacy. The MAC address of the mobile station AMS 100 is used to distinguish the mobile station AMS 100 in the case of a disabled state where the function is disabled. Since the mobile station (AMS, 100) transitioned to the idle mode has no connection information for exchanging normal traffic with the base station (ABS) 210, the re-registration process for the transition to the connected mode (connected mode) state Should be performed. In this case, in order for the mobile station 100 to transition from the idle mode to the connected mode state, a ranging procedure using uplink and downlink resource allocation methods including a transmission / reception procedure of a random access RP code should be performed. The air interface forming the connection between the mobile station (AMS) 100 and the base station (ABS) 210 is performed through R1.

R2 is an interface for configuring protocols and procedures for authentication, services authorization, and IP host configuration management between the mobile station 100 and the CSNs 300 and 400. R2 does not reflect the direct protocol matching between the mobile station 100 and the CSNs 300 and 400, but represents a logical interface. R2 for the LBS service provides a user plane LBS service interface based on Open Mobile Alliance (OMA) SUPL or WLP protocol for matching between the mobile station 100 and the location servers LS, 310, and 410.

R3 is an interface between control plane protocols such as AAA (Authentication, Authorization, Accounting), Policy, and Mobility Management between ASN 200 and CSN 300, 400, and tunneling for delivery of user data. It consists of an interface of a user plane or bearer plane protocol (eg, GRE). R3 for LBS service is based on RADIUS or Diameter protocol for matching between location controller (LC, 251) and location server (LS, 310, 410) and consists of AAA protocol for security. Provides a control plane LBS service interface.

In the LBS location management method by the network, the LBS procedure is triggered from the location servers LS, 310, and 410 located in the CSNs 300 and 400, so that all LBS service application entities are located through the location servers LS, 310, and 410. This means that location information must be requested. When the location server LS, 310, 410 receives a location information request, the location server LS, 310, 410 performs an authentication procedure for the location requestor (eg, 510), and the mobile station (eg, 100). Perform the Authorization procedure to provide the location of. Based on the authorization policy and the quality of service (QoS) of the location request, the capabilities of the mobile station, the location server LS, 310, 410 is a user plane LBS procedure, a control plane LBS procedure, or a combination of the two. Select the appropriate positioning mechanism according to the characteristics.

U1 is located by the Internet Application Service Provider (IASP, 500) through the function between the location requester (eg, 510) and the location server (LS, 310, 410) using Parlay X, Mobile Location Protocol (MLP), HELD protocol, etc. A user interface protocol that provides a service. That is, R2 is a protocol for the location requester 110 mounted in a mobile station (eg, 100) of WiMAX to match with the location servers 310 and 410, and U1 is a location provided by a system (eg, 500) other than WiMAX. It is the interface protocol between the requestor (eg, 510) and the location server (LS, 310, 410).

The present invention provides a function capable of providing an R2 interface for an LBS service, that is, a user plane LBS protocol (eg, WLP, SUPL, or HELD, etc.) of the mobile station 100 without being mounted in the mobile station AMS 100. Characterized by providing the location information.

2 is a diagram illustrating a functional reference model for an LBS service according to an embodiment of the present invention. In contrast to the functional reference model for the LBS service of FIG. 1, the functional reference model for the LBS service according to an embodiment of the present invention is a location server 310, 410 located in the mobile station AMS 100 and the CSN 300, 400. In addition to the R2 interface between the user plane LBS interface between the base station (ABS, 220) and the location server (310, 410) further includes an R2 'interface, and the user plane LBS protocol between the location server (310, 410) and the base station 220 An LBS User-plane Protocol Agent (LUPA) entity is placed in the base station 220 for matching. The location agent LA 221 of FIG. 2 is the same as the location agent LA 211 of FIG. 1.

User plane LBS protocol for the R2 'interface according to an embodiment of the present invention is GPS auxiliary data, device measurements (device measurements) through the direct communication between the location server (LS, 310, 410) and LUPA of the base station (ABS, 220) And location assistance data of the mobile station 100, such as final location information. The LBS procedure when the user plane LBS protocol on the R2 'interface is used as the HELD protocol (FIG. 3) or the SUPL protocol (FIG. 4) will be described with reference to FIGS. 3 and 4.

3 is an LBS service providing procedure according to an embodiment of the present invention, and illustrates a user plane LBS service providing procedure when using the HELD protocol. 3 illustrates an LBS procedure between a mobile station 100, an LUPA 222 in a base station, and a location server 310 or 410 when providing a user plane LBS service using the HELD protocol.

Step S1010: The LUPA 222 finds the location server 310 or 410 using the LS Discovery procedure of the HELD protocol on behalf of the mobile station 100. The location server discovery procedure is performed using LBS capability supporting A-GPS method information. The LBS capability supporting A-GPS method information is obtained by a mobile station (AMS) 100. Information provided to the base station (ABS) 220 in the entry.

Step S1020: The location server 310 or 410 found in step S1010 performs an authentication and authorization procedure with the AAA server, thereby performing a WiMAX session ID and a WIMAX session key. keys) and the Anchor-Authenticator information.

Step S1030: The location server 310 or 410 sends a contextResponse message to the LUPA 222 on behalf of the mobile station 100 to create a context and a location URI set and use the A-GPS pseudorange. Inform them. Here, Uniform Resource Identifier (URI) is an integrated resource identifier and is a unique address representing a resource on the Internet. The existence of a URI always attaches to the Internet protocol as a basic condition required by the Internet.

Step S1040: The LUPA 222 delivers the information of the mobile station 100 and the location URI to the location requestor (eg, 510).

Here, step S1010 ~ S1040 is a preparation step for completing the network registration process of the mobile station (AMS, 100) to perform the LBS service.

Step S1050: The serving base station 220 broadcasts its own geographical location information and the location of the neighboring base station periodically. Such broadcast information is broadcast through an L2 LBS-ADV message. This step is performed for all mobile stations regardless of the state of the mobile station (AMS) 100.

Step S1060: The mobile station (AMS) 100 does not need to report its location to the WiMAX network. The mobile station (AMS) 100 measures and calculates its location using LBS-ADV message information.

Step S1050 and step 1060 are repeated periodically.

Step S1070: The location requester (LR, 510) sends the mobile station to the location server (310 or 410) using a location URI associated with the mobile station (AMS) 100 to obtain location information of the specific mobile station (AMS) 100. Request location information of (100).

Step S1080: The location server 310 or 410 examines the context associated with the location URI and requests the ID (BSID) of the service base station (ABS) 220 from the anchor Authenticator. .

Step S1090: The anchor Authenticator responds with an ID (BSID) of the base station 220 to which the mobile station (AMS) 100 has connected.

Step S1100: The location server 310 or 410 uses the location of the base station 220 via the BSID of the serving base station 220 to determine GPS assistance data.

Step S1110: The location server 310 or 410 transmits a HELD measurement request message for the GPS pseudorange of the mobile station 100 to the LUPA 222. This message includes the GPS assistance data and the base station seed location.

Step S1120: The LUPA 222 of the serving base station (ABS) 220 forwards the DL L2-XFER message to the mobile station 100 in downlink to request the location information of the mobile station 100. The DL L2-XFER message may include GPS assistance data (or GNSS assistance data) required for the mobile station 100 to accurately measure its location.

Step S1130: The mobile station 100 transmits a UL L2-XFER message including the measured GPS measurement value (eg, GPS pseudorange) to the LUPA 222 of the base station.

Step S1140: The LUPA 222 of the serving base station 220 transmits a HELD measurement response message including the received GPS pseudorange to the location server 310 or 410.

Step S1150: The location server 310 or 410 uses the received GPS pseudorange to determine the location of the mobile station 100.

Step S1160: The location server 310 or 410 transmits the determined location of the mobile station 100 to the location requestor LR 510 in a location response message.

As described above, the user plane LBS procedure is provided through direct LBS message transmission and reception between the LUPA 222 of the base station and the location server 310 or 410 using the HELD protocol.

FIG. 4 is a diagram for providing a user plane LBS service when using the SUPL protocol as an LBS service providing procedure according to an embodiment of the present invention. 4 illustrates an LBS procedure between a mobile station 100, an LUPA 222 in a base station, and a location server 310 or 410 when providing a user plane LBS service using the SUPL protocol.

Step S2010: The serving ABS 220 broadcasts its own geographic location information and the location of neighboring base stations. Such broadcast information is broadcast through an L2 LBS-ADV message. This step is performed for all mobile stations regardless of the state of the mobile station.

Step S2020: The mobile station (AMS) 100 does not need to report its location to the WiMAX network. The mobile station (AMS) 100 measures and calculates its location using LBS-ADV message information.

Steps S2010 and S2020 are periodically repeated.

Step S2030: The location requester LR (eg, 510) sends a location request message including ID information of the mobile station 100 to the location server LS, 310 or 410 to obtain the location of the mobile station 100.

Step S2040: The location server 310 or 410 performs an authentication and authorization procedure with the AAA server, and obtains the information of the mobile station AMS 100 and the anchor-authenticator information. .

Step S2050: The location server 310 or 410 requests the ID (BSID) of the serving ABS 220 from the anchor Authenticator.

Step S2060: The anchor Authenticator responds with an ID (BSID) of the service base station 220 to which the corresponding mobile station (AMS) 100 is connected.

Step S2070: The location server 310 or 410 transmits a UDP packet including a location service initialization message (SUPL INIT message) to the service base station 220 where the LUPA 222 is located.

Step S2080: The LUPA 222 sends a location service start message (SUPL Start message) to the location server 310 or 410 in response to the SUPL INIT message on behalf of the mobile station (AMS) 100. The SUPL Start message may include the BSID of the serving base station 220.

Step S2090: The location server 310 or 410 performs the authentication and authorization procedure with the AAA server to obtain the WiMAX session keys of the mobile station 100.

Step S2100: The location server 310 or 410 uses the BSID of the serving base station 220 to determine the GPS assistance data of the mobile station 100.

Step S2110: The location server 310 or 410 sends GPS assistance data to the LUPA 222.

Step S2120: The LUPA 222 of the serving ABS 220 delivers a DL L2-XFER message to the mobile station 100 in downlink to request location information of the mobile station 100. The DL L2-XFER message may include GPS assistance data (or GNSS assistance data) required for the mobile station 100 to accurately measure its location.

Step S2130: The mobile station (AMS) 100 transmits a UL L2-XFER message including the measured GPS measurement value (eg, GPS pseudorange) to the LUPA 222 of the serving base station 220.

Step S2140: The LUPA 222 transmits the received GPS pseudorange information or the calculated position information of the mobile station 100 to the location server 310 or 410.

Step S2150: The LUPA 222 sends a location service end message (SUPL END message) to the location server 310 or 410 and terminates the connection.

Step S2160: When the location server 310 or 410 receives the GPS pseudorange information, the location server 310 or 410 calculates the exact location of the mobile station 100 by using it. Meanwhile, when the location server 310 or 410 receives the accurate location information of the mobile station 100 instead of the GPS pseudorange information, the location calculation process may be skipped.

Step S2170: The location server 310 or 410 sends a location response message containing the calculated location of the mobile station 100 to the location requestor LR 510.

As described above, a user plane LBS procedure is provided through direct LBS message transmission and reception between the LUPA 222 of the base station and the location server (LS, 310 or 410) using the SUPL protocol.

According to an embodiment of the present invention, a user plane LBS protocol (e.g., WLP, SUPL, or HELD, etc.) to be mounted in the mobile station (AMS) 100 is mounted in the LUPA 222 of the base station (ABS). Instead of exchanging user plane LBS messages between the server 100 and the location servers LS, 310, and 410, the user plane LBS messages are exchanged between the LUPA 222 and the location servers LS, 310, and 410. The LUPA 222 of the mobile station AMS 100 and the base station ABS 220 exchanges only LBS measurements such as GPS pseudoranges with each other. Through this, the mobile station AMS 100 may reduce the direct LBS message exchanged with the location servers LS, 310 and 410, and the amount of radio resources used on the radio interface. In addition, since the user plane LBS protocol (for example, WLP, SUPL, or HELD, etc.) for matching between the mobile station AMS 100 and the location servers LS, 310, and 410 is not required, the mobile station AMS 100 is not required to be mounted. As a result, the burden of mounting costs on the mobile station AMS 100 can be reduced, and the software function of the mobile station AMS 100 can be reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

100: mobile station 200: access service network
210, 220: base station 211, 221: location agent
222: LBS user plane protocol agent
250: access service network gateway 251: location controller
300, 400: core services network 350, 450: AAA server
310, 410: location server 110, 510: location requester

Claims (1)

Requesting, by the location service requester, the location server of the mobile terminal from the location server;
Transmitting, by the location server, a location service initialization message to a base station included in an agent using a secure user plane location tracking protocol;
The agent sending a location service start message to the location server including an identifier of the base station;
Determining, by the location server, GPS assistance information using the received identifier of the base station, and transmitting the GPS assistance information to the agent;
Transmitting, by the agent, the GPS assistance information to the mobile terminal;
Calculating, by the mobile terminal, the GPS pseudorange using the GPS assistance information and transmitting the result to the agent;
Sending, by the agent, the GPS pseudorange to the location server and sending a location service termination message to the location server; And
Calculating, by the location server, the location of the mobile terminal using the GPS pseudorange, and transmitting the result to the location service requester;
Location information providing method comprising a.
KR1020130022262A 2012-03-02 2013-02-28 Method for providing location of mobile station in wireless communication system KR20130100744A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015147376A1 (en) * 2014-03-24 2015-10-01 엘지전자 주식회사 Communication method of in-vehicle communication apparatus in wireless communication system, and apparatus therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015147376A1 (en) * 2014-03-24 2015-10-01 엘지전자 주식회사 Communication method of in-vehicle communication apparatus in wireless communication system, and apparatus therefor
US9888372B2 (en) 2014-03-24 2018-02-06 Lg Electronics Inc. Communication method of in-vehicle communication apparatus in wireless communication system, and apparatus therefor

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