KR20050083494A - Method and system for position determination of mobile communication terminal by using mobile communication network and assisted-global positioning system in in-building environment - Google Patents

Abstract

The present invention relates to a positioning method and system of a mobile communication terminal using a mobile communication network and A-GPS in an in-building environment.

A mobile communication terminal supporting the PDDM defined in the IS-801-1 standard; PDDM messages are transmitted and received via the mobile communication network to the mobile communication terminal, and when the positioning using the navigation data received from the mobile communication terminal fails, the (SID, NID) pair received from the mobile communication terminal is checked and built in. A location determination server for generating and transmitting identification information; And receiving the building identification information, the (SID, NID) pair, and the BASE_ID information from the location determination server, grasp the inbuilding information where the mobile communication terminal is located, and provide the requested location-based service to the mobile communication terminal. It provides a positioning system of a mobile communication terminal using a mobile communication network and the A-GPS method in an in-building environment characterized in that it comprises an LBS platform to provide.

According to the present invention, it is possible to provide high positioning accuracy even in an in-building environment using a conventional communication network and a mobile communication terminal without constructing a new network or mounting a new program in the mobile communication terminal.

Description

Method and System for Position Determination of Mobile Communication Terminal by Using Mobile Communication Network and Assisted-Global Positioning System in In-Building Environment}

The present invention relates to a method and system for positioning a mobile communication terminal in an in-building environment. More specifically, GPS can be used by using a positioning message defined in the Interim Standard (801) standard without changing the existing mobile communication network or mobile terminal in an in-building environment such as a tunnel, subway, or a high-rise building. A method and system for providing positioning accuracy in a foundation are provided.

Among various wireless Internet services using a mobile communication terminal such as a mobile phone or a PDA, a location based service (LBS) is particularly popular due to its wide utility and convenience. Location-based wireless Internet services include requests for rescue, response to crime reports, Geographic Information System (GIS) for providing information in neighboring areas, differential pricing of mobile communications by location, traffic information, vehicle navigation and logistics control, location It can be used in various fields and situations such as customer relationship management (CRM).

In order to use the location-based wireless Internet service, it is essential to know the location of the wireless communication terminal. Currently, PDT (Position Determination Technology), which uses a wireless communication to locate a location, is based on a network-based method using a received signal from a wireless base station and a handset based on a GPS (Global Positioning System) signal. (Handset-Based) and a hybrid method that combines the two technologies to improve position accuracy.

The network-based method does not need to add a new module for positioning to an existing mobile communication terminal, so it does not pay additional cost for mobile communication development. However, the position error is approximately 500 m depending on the cell size of the wireless base station. The disadvantage is that the accuracy is low enough to reach a few Km. Therefore, at present, a handset based method using a GPS signal is widely used as a method for positioning using mobile communication.

1 is a block diagram schematically illustrating an example of a conventional handset based location based service system 100.

The conventional GPS-based location-based service system 100 includes a GPS satellite 110, a mobile communication terminal 120, a base transceiver station (BTS) 130, and a base station controller (BSC) 135. , A mobile switching center (MSC) 150, a positioning server 160, and the like.

The GPS satellite 110 is a satellite used to locate the mobile communication terminal 120 in GPS. In GPS, the GPS satellite 110 is composed of 24 satellites that continuously transmit the navigation data necessary for position calculation to the mobile communication terminal 120 through a carrier wave, of which 21 satellites are used for navigation. The three satellites are reserved for reserve.

The mobile communication terminal 120 is a terminal having a built-in GPS receiver for receiving navigation data from the GPS satellites 110. The base station transmitter 130, the base station controller 135, and the mobile switching center 150 perform functions such as clock distribution, GPS data transmission and reception, etc. for GPS, along with conventional call processing functions.

The positioning server 160 receives location information such as latitude and longitude coordinates from the mobile communication terminal 120, calculates the location of the mobile communication terminal 120, and provides a separate LBS platform for providing various LBSs. ).

On the other hand, the GPS described in FIG. 1 has the advantage that anyone can freely use it freely, there is no limit to the number of users, continuous positioning in real time, and relatively accurate position measurement is possible.

However, the lack of multipath and visibility limits the ability to locate in the city center, makes it almost impossible to accurately position in places where satellites are not visible (such as out of radio waves), such as in tunnels or underground buildings. There is a problem that a large error occurs in the positioning state according to the arrangement of the satellite viewed from the receiver. In addition, the time to first fix (TTFF), which is the actual time required for the GPS receiver to determine its location in the first place, sometimes takes about several minutes to ten minutes or more. There is a problem that causes great inconvenience.

In order to compensate for the disadvantages of the GPS method, an A (Assisted) -GPS method for determining the location of the mobile communication terminal by combining resources of the mobile communication network with the GPS method has been developed and used. In the A-GPS method, the mobile communication terminal collects the information necessary for positioning from the GPS satellites and the mobile communication network, so that the mobile communication terminal can determine the location in three dimensions. Send and receive data or messages using parameters.

The A-GPS method is a network-based handset assisted GPS (MS-Assisted Network-Based GPS) (hereinafter referred to as "MS-Assisted GPS") and a network-assisted handset-based GPS (MS-Based Network-Assisted GPS) (hereinafter, 'MS-Based GPS'). Both the MS-Assisted GPS method and the MS-Based GPS method receive Aiding data transmitted from a predetermined positioning server to locate a mobile communication terminal to obtain GPS radio waves from one or more satellites.

The A-GPS method also has a disadvantage in that positioning accuracy is greatly reduced due to poor reception of GPS radio waves in in-building environments such as tunnels, subways, and skyscrapers. Therefore, in recent years, various technologies such as an in-building light distribution system for increasing the positioning accuracy of a mobile communication terminal in an in-building environment have been developed.

2 is a block diagram schematically illustrating a conventional light distribution system 200 for in-building.

Conventional in-building light distribution system 200 comprises a wireless base station 210, the main donor (Main Donor) 220, a sub donor (230) and a plurality of Remote (260) do.

Referring to the down stream process in which data is transmitted from the wireless base station 210 to the plurality of remotes 260, the main donor 220 receiving the signal transmitted from the wireless base station 210 is illustrated in FIG. 1. Although not shown, branches to multiple, generally four, RF signals using an RF divider or splitter. Each branched RF signal is amplified to an appropriate level through an amplifier (not shown) and then converted into an analog or digital optical signal by the all-optical converter 221. The converted optical signal is transmitted to the sub donor 230 through the wavelength division multiplexing (WDM) unit 223 and the optical path.

Of course, the main donor 220 receives the optical signal transmitted from the sub-donor 230 in the WDM unit 223 and transmits the optical signal to the photoelectric conversion unit 222, and converts the optical signal into an RF signal in the photoelectric conversion unit 222. An upstream operation transmitted to the base station 210 is also performed.

The sub-donor 230 performs a function of amplifying and transmitting the optical signal received from the main donor 220. First, the downstream process will be described. The WDM unit 231 receives the optical signal from the main donor 220. Receives and transmits to the photoelectric conversion unit 232, the photoelectric conversion unit 232 converts the received optical signal to an RF signal and transmits to the RF divider 234. The RF divider 234 branches the received RF signal into a plurality of parts and transmits the received RF signals to the all-optical converters 241 and 251 of the all-optical / photoelectric converters 240 and 250.

Here, each of the RF signals branched by the RF divider 234 is amplified by the signal amplifying element, although not shown in FIG. 2, and then transferred to the all-optical converters 241 and 251. The all-optical converters 241 and 251 convert the received RF signal into an optical signal and transmit the converted RF signal to each remote 260 through the WDM units 243 and 253 and the optical path. Each remote 260 converts the received optical signal into an RF signal and transmits an RF signal to a plurality of mobile communication terminals within a predetermined area.

Meanwhile, in the upstream process of the sub donor 230, the WDM units 243 and 253 receive the respective optical signals transmitted through the remote 260 and the optical path, and the photoelectric converters 242 and 252 receive the respective optical signals. The optical signal is converted into an RF signal and transmitted to the RF combiner 235. Of course, the RF signals converted by the photoelectric converters 242 and 252 are amplified by a signal amplifier (not shown) and transferred to the RF combiner 235.

The RF combiner 235 integrates a plurality of received RF signals into one RF signal and transmits the received RF signal to the all-optical converter 233, and the all-optical converter 233 converts the received RF signal into an optical signal to WDM. Transmission to the main donor 220 through the unit 231 and the optical path.

However, the in-building light distribution system 200 described in FIG. 2 includes a plurality of main donors, a sub-donor that is a kind of hub, an in-building optical repeater, an in-building antenna, a wireless LAN, a gap filler, and the like. It is disadvantageous that it requires a lot of cost and time because it is necessary to build a new network through the installation of additional equipment. In addition, there are many disadvantages, such as having to go through a cumbersome process of mounting a new function in the mobile communication terminal according to the type of inbuilding system to be built.

In order to solve the above disadvantages, the present invention is a location defined in the IS (Interim Standard) -801-1 standard without changing the existing mobile communication network or mobile communication terminal in an in-building environment such as tunnels, subways, skyscrapers, etc. It is an object of the present invention to provide a method and system for providing positioning accuracy on a GPS basis using a decision message.

According to an object of the present invention for this purpose, an in-building positioning system for positioning a mobile communication terminal using the MS-Assisted GPS method defined in the IS-801-1 standard in an in-building environment, which is defined in the IS-801-1 standard. A mobile communication terminal supporting the PDDM; Transmitting and receiving a PDDM message through the mobile communication terminal and the mobile communication network, and performs positioning using the navigation data received from the mobile communication terminal, if the positioning using the navigation data fails received from the mobile communication terminal A location determination server that checks (SID, NID) pairs and generates and sends in-building identification information; And receiving the in-building identification information, the (SID, NID) pair and the BASE_ID information from the location determination server, grasp the in-building information where the mobile communication terminal is located, and request the requested location-based service. It provides a positioning system of a mobile communication terminal using the mobile communication network and the A-GPS method in an in-building environment, characterized in that it comprises an LBS platform provided to the mobile communication terminal through a mobile communication network.

According to another object of the present invention, a mobile communication terminal supporting the IS-801-1 standard, a positioning server for transmitting and receiving a PDDM message to and from the mobile communication terminal and performing an inbuilding positioning, and an inbuilding positioning in conjunction with the positioning server. A method for performing in-building positioning in a positioning system including an LBS platform that provides a location based service according to claim 1, wherein the positioning server forms a traffic channel with the mobile communication terminal to provide a " Provide Pilot Phase Measurement " Receiving a message; (b) receiving a " Provide Pseudorange Measurement " message from the mobile terminal and performing positioning to determine whether the positioning is failed; (c) if the positioning fails in step (b), determining, by the positioning server, whether the (SID, NID) pair received from the mobile communication terminal is an inbuilding value; And (d) generating in-building identification information and transmitting the (SID, NID) pair and the received BASE_ID information together to the LBS platform if it is determined as the value for in-building in step (c). The present invention provides a positioning method of a mobile communication terminal using a mobile communication network and an A-GPS method in an in-building environment.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

3 is a block diagram schematically illustrating an in-building positioning system 300 for positioning a mobile communication terminal in an in-building environment according to a preferred embodiment of the present invention.

In-building positioning system 300 according to a preferred embodiment of the present invention is a mobile communication terminal 310, wireless base station 320, mobile switching center 330, manganese interworking device 340, positioning server 350, Location center 360, LBS platform 370, map server 380, and the like. In-building positioning system 300 according to a preferred embodiment of the present invention is a system for providing a location-based service by detecting the location of the mobile communication terminal in the in-building environment, such as tunnels, subways, skyscrapers.

In particular, the in-building positioning system 300 according to an embodiment of the present invention does not mount a new software or establish a new network in a mobile communication terminal for positioning of a mobile communication terminal in an in-building environment. Use it as it is. Therefore, it is not necessary to develop a new positioning communication protocol required for mounting a new software or a new network in a mobile communication terminal, and is defined in the standard of IS (Interim Standard) -801-1 used in an existing communication network. Position Determination Data Message (PDDM) is used to provide GPS positioning accuracy in non-inbuilding environments.

The mobile communication terminal 310 transmits MS information to the location determination server 350 through the mobile communication network in order to determine the location using the MS-Assisted GPS method. The location determination server 350 generates auxiliary data for location determination of the mobile communication terminal using the received terminal information and transmits the auxiliary data to the mobile communication terminal 310 through the mobile communication network (Provide GPS Acquisition Assistance). The mobile communication terminal 310 receives GPS radio waves from one or more GPS satellites (not shown) using the received auxiliary data, extracts navigation data included in the received GPS radio waves, and transmits the GPS data to the positioning server 350. Provide Pseudorange Measurement.

Meanwhile, the mobile communication terminal 310 is equipped with one or more components of a GPS antenna, a GPS receiver, and a GPS chipset for receiving GPS radio waves from a GPS satellite (not shown) and extracting navigation data included in the GPS radio waves. It is.

Mobile communication terminal 310 according to a preferred embodiment of the present invention is a PDA (Personal Digital Assistant), cellular phone, PCS (Personal Communication Service) phone, hand-held PC (Hand-Held PC), CDMA-2000 phone, MBS ( Mobile Broadband System) phones, notebook computers, and the like. Here, MBS phone refers to a mobile phone to be used in the fourth generation system currently being discussed. That is, the MS-Assisted GPS method according to an embodiment of the present invention may be applied to not only a synchronous mobile communication system and an asynchronous mobile communication system but also a fourth generation ALL-IP system.

The base station (BS) 320 includes a base station transmitter 322 and a base station controller 324. The base station transmitter 322 receives location information transmitted from the mobile communication terminal 310 and transmits it to the base station controller 324. The base station controller 324 controls the base station transmitter 322, and assigns and releases radio channels for the mobile communication terminal 310, controls the transmission output of the mobile communication terminal 310 and the base station transmitter 322, and soft cell-off between cells. It performs soft handoff and hard handoff decision, transcoding and vocoding, and operation and maintenance of wireless access network.

Meanwhile, the base station transmitter 322 and the base station controller 324 according to the embodiment of the present invention have a configuration capable of supporting both a synchronous mobile communication system and an asynchronous mobile communication system. Here, in a synchronous mobile communication system such as CDMA 2000 1X, CDMA 2000 1x Evolution-Data Only (EV-DO), the base station transmitter 322 is a base transceiver station (BTS), and the base station controller 324 is a base station BSC (base station). Controller. In addition, in an asynchronous mobile communication system such as wideband CDMA (WCDMA), the base station transmitter 322 is a radio transceiver subsystem (RTS), and the base station controller 324 is a radio network controller (RNC).

The mobile switching center 330 has a control function for enabling wireless base stations to operate efficiently and an interworking function with an electronic exchange installed in a public switched telephone network (PSTN). The mobile switching center 330 receives data or a message transmitted from the mobile communication terminal 310 through the base station controller 324 and transmits it to the positioning server 350 or the LBS platform 370 through the manganese interworking device 340. do. The mobile switching center 330 performs basic and additional service processing, incoming and outgoing call processing of a subscriber, location registration and handoff procedures, and interworking with other networks. The mobile switching center 330 according to an embodiment of the present invention may support both an Interim Standard (IS) -95 A / B / C system and a third generation and fourth generation mobile communication network.

That is, the mobile communication network including the wireless base station 320 and the mobile switching center 330 according to an embodiment of the present invention supports Code Division Multiple Access (CDMA), CDMA2000 1X, 3X, EV-DO, and EV-DV.

Inter-working function (IWF) 340 is an interface for interworking with a mobile communication network and a wired communication network including the Internet, a public switched telephone network, a packet switched public data network (PSPDN), and the like. Interfacing) function.

The Positioning Determination Entity (PDE) 350 receives terminal information such as resolution of the wireless base station 320 from the mobile communication terminal 310 and transmits auxiliary data to the mobile communication terminal 310. . In more detail, when the position information server 350 receives a terminal information of the wireless base station 320 from the mobile communication terminal 310 because a reference GPS antenna (not shown) is installed, the corresponding wireless base station 320. Retrieves the GPS satellite information (coordinate information, identification code information, etc.) that can receive GPS radio waves in the mobile communication terminal 310 to include in the "Provide GPS Acquisition Assistance" message defined in the IS-801-1 standard To send. Here, the terminal information is specifically information about a pilot phase capability, a GPS acquisition capability, and a position calculation capability of the terminal.

The mobile communication terminal 310 receiving the "Provide GPS Acquisition Assistance" message extracts one or more azimuth angle and elevation angle values included in the message, and the corresponding GPS satellites. Search for and receive the outgoing GPS radio waves. The mobile communication terminal 310 receiving GPS radio waves from one or more GPS satellites extracts navigation data included in the received GPS radio waves and transmits them in a "Provide Pseudorange Measurement" message.

Meanwhile, as a result of positioning by the A-GPS algorithm using the navigation data included in the "Provide Pseudorange Measurement" message received from the mobile communication terminal 310, the positioning server 350 determines that the mobile communication terminal has failed. It is determined that 310 is located in the in-building environment and performs in-building positioning. In this case, when the location server 350 fails to locate using the A-GPS algorithm, GPS positioning information included in the received navigation data is insufficient and is mainly generated in the in-building environment.

In-building positioning according to a preferred embodiment of the present invention will be described in more detail with reference to FIG. 6.

The mobile positioning center (MPC) 360 acquires the latitude and longitude coordinates of the mobile communication terminal 310 calculated by the positioning server 350 in conjunction with the positioning server 350 to provide location-based services. It performs a routing function to transmit to the LBS platform 370.

The LBS platform 370 refers to a kind of application server for providing an LBS service to the mobile communication terminal 310. The LBS platform 370 calculates the latitude and longitude coordinates using navigation data (one or more GPS satellite information) included in the "Provide Pseudorange Measurement" received from the mobile communication terminal 310, thereby calculating the mobile terminal 310 or the map server ( 380). In addition, the LBS platform 370 receives a map from the map server 380 which will be described later, transmits to the mobile communication terminal 310 through a mobile communication network, and registers and deletes a plurality of LBS information providing servers (not shown) that interoperate with each other. , Billing function for the mobile communication terminal 310 and the like. Here, the LBS information providing server refers to a content providing (CP) server for providing various crisis-based services to the mobile communication terminal in conjunction with the LBS platform. For example, the LBS service provided by the LBS information providing server may include various services such as geographic information service, shortest distance / time path service, point of interest service, and LBS-based advertising service.

The location information database 372 stores data such as SID (System ID), NID (Network ID), and BASE_ID classified by radio base station and cell in the country. Here, BASE_ID is a value generated by combining the base station controller ID and the base station transmitter ID of the wireless base station, and a unique value is set for each wireless base station. In particular, according to an embodiment of the present invention, the location information database 372 classifies and stores SID, NID, BASE_ID, etc. according to each inbuilding environment such as subway, tunnel, high-rise building, etc. I will explain in detail.

The map server 380 generates a map of a predetermined range based on the location of the mobile communication terminal 310 using the location information of the mobile communication terminal 310 received from the LBS platform 370 to generate the LBS platform 360 and It transmits to the mobile communication terminal 310 through the mobile communication network. To this end, the map server 380 may interwork with a separate map database in which an electronic map of a nationwide unit is embedded, or may internally map data.

4 is a diagram schematically illustrating an internal configuration of the location information database 372 according to an embodiment of the present invention in a tree structure.

In FIG. 4, in-building identification information is information for identifying an in-building type, and different identification codes are set according to various in-building types (subway, tunnel, high-rise building, etc.). For example, the in-building identification information may be set to 'AAA' in the subway, 'BBB' in the tunnel, and 'CCC' in the high-rise building. In addition, different SID and NID pairs are set according to each kind of inbuilding. For example, (SID, NID) pairs (2236, 111) for subways, (SID, NID) pairs (2236, 222) for tunnels, and (SID, NID) pairs (2236, 333) to (2236, XXX), and the like.

The location information database 372 is preferably constructed in administrative district units (city, county, ward, etc.) including subways, tunnels, high-rise buildings, etc., but is not necessarily limited thereto. It could be. In particular, it is desirable to classify subways, tunnels, etc., which are not large in number, by city, but in the case of high-rise buildings with large numbers, it is preferable to classify them in a certain area unit, for example, in an old unit, in a large city in order to improve search speed. something to do. For example, in Seoul, the search speed may be improved by differently setting the (SID, NID) pairs in units of Gangnam-gu, Gangseo-gu, Gangdong-gu, and Seocho-gu.

On the other hand, a plurality of different BASE_IDs are allocated to each (SID, NID) pair set in each building ID. Here, each BASE_ID is matched with name information such as subway name, tunnel name, high-rise building name, address information, and the like. Accordingly, the LBS platform 370 that receives the in-building identification information from the location determination server 350 checks the (SID, NID) pair to identify the corresponding area, and checks the BASE_ID to name the subway, tunnel, high-rise building, and the like. Check the information and / or address information.

On the other hand, the location information database 372 is updated according to changes in the in-building environment such as new construction and reconstruction of subways, tunnels, high-rise buildings, and the like, and expansion of wireless base stations and exchangers that cover the existing in-building environment.

5 is an exemplary screen illustrating a "Provide Pilot Phase Measurement" message defined in the IS-801-1 standard.

Looking at the "Provide Pilot Phase Measurement" message defined in the IS-801-1 standard of FIG. 5, it can be seen that the (SID, NID) pair and the BASE_ID are included. Accordingly, the location determination server 350 checks the (SID, NID) pair to determine the inbuilding type, and generates in-building identification information corresponding to the inbuilding type to generate the in-building identification information and the (SID, NID) pair. And BASE_ID information is transmitted to the LBS platform 370 via the location center 360. Referring to FIG. 4, it can be seen that the (SID, NID) pair is (2236, 111), so that the inbuilding environment is a subway station. Thus, the inbuilding identification information that the location server 350 sends to the LBS platform 370 will be "AAA". For reference, the "Provide Pilot Phase Measurement" message includes reference pseudonoise code (REF_PN), Pilot_PN_Phase information, Pilot_Strength information, RMS_Err_Phase information, etc. for the extra pseudonoise codes received by the mobile terminal 310. .

6 is a flowchart illustrating a process of positioning a mobile communication terminal in an in-building environment using a PDDM defined in the IS-801-1 standard according to a preferred embodiment of the present invention.

When the location-based service is requested from the mobile communication terminal 310, the location determination server 350 forms a traffic channel with the mobile communication terminal 310 (S600). After establishing a traffic channel, the mobile communication terminal 310 transmits a "Provide Pilot Phase Measurement" message to the location determination server 350 (S602). In this case, the predetermined process includes a process in which the location determination server 350 transmits a "Request MS Information" message to the mobile communication terminal 310 and receives a "Provide MS Information" message from the mobile communication terminal 310. And transmitting a “Request Pilot Phase Measurement” message to the terminal 310.

The location determination server 350 receiving the "Provide Pilot Phase Measurement" message uses the (SID and NID) pairs and BASE_ID information included in the received message to determine the GPS satellite information that can be observed at the location of the mobile communication terminal 310. A “Provide GPS Acquisition Assistance” message is generated and transmitted to the mobile communication terminal 310 (S604). After receiving the "Provide GPS Acquisition Assistance" message, the mobile communication terminal 310 searches for GPS radio waves using azimuth, altitude, etc. values of one or more GPS satellites included in the received message, and then "Provide Pseudorange Measurement". A message is generated and transmitted to the location determination server 350 (S606).

The positioning server 350 receiving the "Provide Pseudorange Measurement" message performs positioning using the built-in A-GPS algorithm to determine whether a positioning failure occurs (S608). If the location determination server 350 determines that positioning has failed, the mobile station 310 generates a "Request Pilot Phase Measurement" message and transmits it to the mobile communication terminal 310 (S610). Upon receiving the "Request Pilot Phase Measurement" message, the mobile communication terminal 310 generates a "Provide Pilot Phase Measurement" message and transmits it to the location determination server 350 (S612).

The location determination server 350 receiving the "Provide Pilot Phase Measurement" message checks the (SID, NID) pair included in the received message (S614). The location determination server 350 determines whether the value of the (SID, NID) pair checked in step S614 is an inbuilding value set in the inbuilding area (S616). Accordingly, the location server 350 stores (SID, NID) pair data allocated to the in-building area in the in-building positioning system according to the embodiment of the present invention.

If it is determined in step S616 that the location determination server 350 is the value for inbuilding, the location determination server 350 generates the corresponding inbuilding identification information and transmits the location information to the LBS platform 370 through the location center 360 (S618). Here, the location determination server 350 also transmits the received (SID, NID) pair and the BASE_ID information together with the in-building identification information.

The LBS platform 370, which has received the in-building identification information, the (SID, NID) pair, and the BASE_ID information through the location server 350 and the location center 360, checks the received in-building identification information and indicates that it is an in-building location. In operation S620, the location information database 372 is searched using the (SID, NID) pair and the BASE_ID. The LBS platform 370 uses the search result of the location information database 372 in step S620 to grasp the in-building information of the location where the mobile communication terminal 310 is located. Here, the inbuilding information means an inbuilding place name and address. The LBS platform 370 provides the requested location-based service using the inbuilding information identified in step S620 (S622).

The above description is merely illustrative of the present invention, and those skilled in the art to which the present invention pertains may various modifications without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed herein are not intended to limit the present invention but to describe the present invention, and the technical spirit and scope of the present invention are not limited by these embodiments. It is intended that the scope of the invention be interpreted by the following claims, and that all descriptions within the scope equivalent thereto shall be construed as being included in the scope of the present invention.

As described above, the technology for improving the positioning accuracy in the current in-building environment has the disadvantage of having to build a new network, and install new software in the mobile communication terminal, but according to the present invention, the resources of the existing communication network are intact. It can be used to provide GPS positioning accuracy in a general environment without installing new software in the mobile communication terminal.

Therefore, since it costs no cost to construct a new communication network or system for accurate positioning in the conventional in-building environment, the cost can be drastically reduced, and inconvenience and inconvenience of the user due to software upgrade of the mobile communication terminal are eliminated. It has the effect of solving all the problems of roaming.

1 is a block diagram schematically illustrating an example of a conventional handset-based location-based service system;

2 is a block diagram schematically showing a conventional light scattering system for inbuilding;

3 is a block diagram schematically illustrating an in-building positioning system for positioning a mobile communication terminal in an in-building environment according to a preferred embodiment of the present invention.

4 is a diagram schematically showing an internal configuration of a location information database according to an embodiment of the present invention in a tree structure;

5 is a flowchart illustrating a process of positioning a mobile communication terminal in an in-building environment using a PDDM defined in an IS-801-1 standard according to a preferred embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

200: light distribution system for inbuilding 210, 320: wireless base station

220: main donor 230: sub donor

260: remote 310: mobile communication terminal

330: mobile switching center 340: manganese interlocking device

350: positioning server 360: location center

370: LBS platform 372: location information DB

380: map server

Claims (24)

An in-building positioning system for positioning a mobile communication terminal using the MS-Assisted GPS method defined in the IS (Interim Standard) -801-1 standard in an in-building environment. A mobile communication terminal supporting a Position Determination Data Message (PDDM) defined in the IS-801-1 standard; Transmitting and receiving a PDDM message through the mobile communication terminal and the mobile communication network, and performs positioning using the navigation data received from the mobile communication terminal, if the positioning using the navigation data fails received from the mobile communication terminal A position determination server (PDE: Position Determination Entity) for checking and generating (SID, NID) pairs to generate in-building identification information; And Receive the building identification information, the (SID, NID) pair, and the BASE_ID information from the location determination server, determine the inbuilding information of the location where the mobile communication terminal is located, and move the requested location-based service. LBS platform provided to the mobile communication terminal through a communication network Positioning system of a mobile communication terminal using a mobile communication network and the A-GPS method in an in-building environment comprising a. The method of claim 1, The (SID, NID) pair and the BASE_ID information are included in the " Provide Pilot Phase Measurement " message transmitted from the mobile communication terminal to the location determination server among the PDDM messages. Positioning system of mobile communication terminal using A-GPS method. The method of claim 1, The navigation data is GPS satellite information including an azimuth angle value and an elevation angle value of one or more GPS satellites, wherein the GPS satellite information is transmitted from the PDDM message to the positioning server. A positioning system of a mobile communication terminal using an A-GPS method and a mobile communication network in an in-building environment, which is included in a "Provide Pseudorange Measurement" message to be transmitted. The method of claim 1, The inbuilding identification information is information for identifying an inbuilding type of the location where the mobile communication terminal is located, and different values are set according to each of the inbuilding types. Positioning system of mobile communication terminal using A-GPS method. The method of claim 1, And (SID, NID) pair data set in an inbuilding area of the positioning system is stored in the location determination server of a mobile communication terminal using an A-GPS method and a mobile communication network. The method according to claim 1 or 5, The LBS platform is linked to the location information database in which at least one of the (SID, NID) pair, the in-building identification information and the BASE_ID information set in the in-building area in the positioning system is stored. Positioning system of mobile communication terminal using mobile communication network and A-GPS method. The method of claim 6, In the location information database, one or more (SID, NID) pairs and one or more pieces of the BASE_ID information are classified and stored according to the in-building identification information. Positioning system of mobile communication terminal. The method of claim 7, wherein The (SID, NID) pairs are differently allocated to the location information database for each predetermined area unit, and each of the (SID, NID) pairs is assigned one or more pieces of the BASE_ID information. Positioning system of mobile communication terminal using communication network and A-GPS method. The method of claim 1, The in-building information includes at least one of a name, an address, and related information of a location where the mobile communication terminal is located. The positioning system of the mobile communication terminal using the mobile communication network and the A-GPS method in an in-building environment. . The method according to claim 1 or 9, The LBS platform and the mobile communication network in the in-building environment, characterized in that for interfacing with the map server for generating a map using the in-building information to provide a map service to the mobile communication terminal using the identified in-building information. Positioning system of mobile communication terminal using A-GPS method. The method of claim 1, The positioning system includes a location center (MPC: Mobile Positioning Center) that performs a routing function of transmitting the in-building identification information, the (SID, NID) pair, and the BASE_ID information to the LBS platform. Positioning system of a mobile communication terminal using a mobile communication network and the A-GPS method in an in-building environment characterized in that the installation is further. The method of claim 1, The positioning system is further provided with an inter-working function (IWF) for interfacing communication between the mobile communication network and the location determination server and / or the LBS platform. Positioning system of mobile communication terminal using mobile communication network and A-GPS method in environment. The method of claim 1, The mobile communication network is at least one of a code division multiple access (CDMA), CDMA2000 1X, 3X, EV-DO, EV-DV positioning system of the mobile communication terminal using the mobile communication network and the A-GPS method in the in-building environment. . The method of claim 1, The mobile communication terminal may be a PDA (Personal Digital Assistant), cellular (Cellular) phone, PCS (Personal Communication Service) phone, hand-held PC (Hand-Held PC), EV-DO phone, EV-DV (Data and Voice) phone And an MBS (Mobile Broadband System) phone. The positioning system of a mobile communication terminal using an A-GPS method and a mobile communication network in an in-building environment. A mobile communication terminal supporting the IS (Interim Standard) -801-1 standard, a positioning server performing an in-building positioning by transmitting and receiving a Position Determination Data Message (PDDM) message with the mobile communication terminal, and interworking with the positioning server A method for performing in-building positioning in a positioning system including an LBS platform that provides location-based services according to in-building positioning, (a) the location determination server establishing a traffic channel with the mobile communication terminal to receive a "Provide Pilot Phase Measurement" message; (b) receiving a " Provide Pseudorange Measurement " message from the mobile terminal and performing positioning to determine whether the positioning is failed; (c) if the positioning fails in step (b), determining, by the positioning server, whether the (SID, NID) pair received from the mobile communication terminal is an inbuilding value; And (d) if it is determined in step (c) that the inbuilding value is generated, generating inbuilding identification information and transmitting the (SID, NID) pair and the received BASE_ID information together to the LBS platform; Positioning method of a mobile communication terminal using a mobile communication network and the A-GPS method in an in-building environment comprising a. The method of claim 15, The "Provide Pilot Phase Measurement" message and the "Provide Pseudorange Measurement" message are messages defined in the IS-801-1 standard, and the positioning of the mobile communication terminal and the mobile communication terminal using the A-GPS method in an in-building environment. Way. The method of claim 15, wherein in step (a) The location determination server that forms the traffic channel transmits a "Request MS Information" message and a "Request Pilot Phase Measurement" message to the mobile communication terminal, and receives a "Provide MS Information" message from the mobile communication terminal. A method of positioning a mobile communication terminal using an A-GPS method and a mobile communication network in an in-building environment, characterized in that it is performed before the process of receiving a "Provide Pilot Phase Measurement" message. The method of claim 15, wherein in step (a) The "Provide Pilot Phase Measurement" message includes (NID, SID) pairs and BASE_ID information. The positioning method of a mobile communication terminal using an A-GPS method and a mobile communication network in an in-building environment. The method of claim 15, wherein in step (b) The " Provide Pseudorange Measurement " message includes GPS satellite information including Azimuth Angle and Elevation Angle values of one or more GPS satellites. Positioning method of mobile communication terminal using GPS method. The process of claim 15, wherein in step (c) If the positioning server fails in positioning, the positioning server generates and transmits a "Request Pilot Phase Measurement" message defined in the IS-801-1 standard to the mobile communication terminal, and a new "Provide Pilot Phase Measurement" message from the mobile communication terminal. Positioning method of a mobile communication terminal using a mobile communication network and the A-GPS method in an in-building environment characterized in that for receiving the. The method of claim 20, The positioning server selectively uses one of the two (SID, NID) pairs included in the "Provide Pilot Phase Measurement" message or the new "Provide Pilot Phase Measurement" message received in step (a). A method of positioning a mobile communication terminal using an A-GPS method and a mobile communication network in an in-building environment characterized in that it is determined whether the value is for a building. The process of claim 15, wherein in step (d) The inbuilding identification information is information for identifying an inbuilding type of the location where the mobile communication terminal is located, and different values are set according to each of the inbuilding types. Positioning method of mobile communication terminal using A-GPS method. The method of claim 22, The inbuilding type is a positioning method of a mobile communication terminal using an A-GPS method and a mobile communication network in an in-building environment, characterized in that it includes one or more information of the name, address and related information of the location where the mobile communication terminal is located. . The method of claim 15 or 22, The LBS platform and the mobile communication network in the in-building environment to determine the type of in-building using at least one of the received in-building identification information, the (SID, NID) pair and the received BASE_ID information. Positioning method of mobile communication terminal using A-GPS method.