KR101503488B1 - Server and Method for Building pCell Database - Google Patents

Server and Method for Building pCell Database Download PDF

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KR101503488B1
KR101503488B1 KR1020080094498A KR20080094498A KR101503488B1 KR 101503488 B1 KR101503488 B1 KR 101503488B1 KR 1020080094498 A KR1020080094498 A KR 1020080094498A KR 20080094498 A KR20080094498 A KR 20080094498A KR 101503488 B1 KR101503488 B1 KR 101503488B1
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South Korea
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pcell
data
active
database
ppm
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KR1020080094498A
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Korean (ko)
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KR20100035244A (en
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박주열
김창영
김정철
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에스케이플래닛 주식회사
에스케이텔레콤 주식회사
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Priority to KR1020080094498A priority Critical patent/KR101503488B1/en
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Abstract

The present invention relates to a server and a method for constructing a pCell database.

When constructing a pCell database, when there are a plurality of active PNs having a signal-to-noise ratio equal to or greater than a predetermined reference value in PPM data corresponding to predetermined small-diameter data, a plurality of active PNs are allocated in a pCell database corresponding to predetermined small- lt; RTI ID = 0.0 > pCell < / RTI >

According to the present invention, since the pCell positioning server stores not only the reference PN of the PPM data but also the neighboring PN corresponding to the active PN as the reference PN information in the pCell database for the handoff boundary region between the base stations having a plurality of active PNs, The pCell positioning of the mobile communication terminal located at the border area of the handoff can be accurately performed.

pCell database, pCell, reference PN, signal to noise ratio, active PN

Description

[0001] Server and Method for Building a pCell Database [0002]

The present invention relates to a server and a method for constructing a pCell database. More particularly, the present invention relates to a server and a method for constructing a pCell database by using PPM (Pilot Phase Measuremtnt) data and up / longitude data measured by a mobile communication terminal in detecting a position of a mobile communication terminal using a pCell database .

The network-based positioning method using the pCell database is a positioning method for supplementing the conventional positioning method, the hybrid method combining the network-based method, the handset-based method, the network-based method, and the handset-based method , The location of the corresponding terminal is determined in the same manner as in FIG.

First, in order to determine the location of the terminal using the network-based positioning method using the pCell database, the pCell positioning server constructs a pCell database in which the location measurement service target area is divided into grid units of a predetermined size (S110) It is continuously checked whether a positioning request has occurred from the subscriber terminal of the subscriber's mobile communication terminal (S120).

When the positioning request is generated from the subscriber terminal, the position calculation server receives the PPM (Pilot Phase Measurement) data received from the subscriber terminal from the position calculation server, compares the PPM data with the pCell database to determine the matching pCell, As a measurement result, a location measurement result is transmitted to a location based service platform (LBSP) that provides a location based service (S 130). In this case, the position calculation server is a Position Determining Entity (PDE) in a synchronous Code Division Multiple Access (CDMA) system, a Position Server (PS) in an asynchronous W-CDMA In GSM (Global System for Mobile Communication), SMLC (Serving Mobile Location Center) is applied.

The conventional scheme for constructing the pCell database in step S110 of FIG. 1 is the same as that of FIG.

Figure 2 is a flow diagram illustrating a conventional method for building a pCell database.

First, in order to construct a pCell database, a location measurement service area is divided into grid units of a predetermined size as shown in FIG. 3, and each grid is defined as pCell to give an ID (IDentification) having unique information (S210). Here, the unique information of the pCell ID may be latitude and longitude data (hereinafter referred to as "latitude and longitude data") of the center point of each lattice and latitude and longitude data of the four corners. Here, the size of the grid can be divided into 100 × 100 m, 50 × 50 m, 25 × 25 m, etc. according to the required positioning accuracy specification.

The positioning results for each pCell ID are collected (S220). Here, the positioning result includes the PPM (Pilot Phase Measurement) data received by the position calculation server from the mobile communication terminal and the latitude data (A-GPS or network-based positioning result), that is, the area where the mobile communication terminal is located .

The pCell database is constructed by extracting necessary parameters from the collected positioning result for each pCell ID (S230).

As described above, the pCell database constructed by the pCell positioning server stores the mobile communication system ID (SID), the mobile communication network ID (NID), and the base station ID (Base ID) by each pCell ID, Reference Pseudo Noise (Ref_PN) information and one or more neighboring PN (Measurement PN) information, and includes one reference PN information for each pCell ID.

Accordingly, when the pCell positioning server performs pCell positioning for a subscriber terminal located in a handoff boundary area between base stations, one of the one or more active pseudo noise (PN) can be a reference PN of PPM data, the pCell positioning server The reference PN included in the PPM data may be inconsistent with the reference PN information of the pCell corresponding to the area (the handoff boundary area) where the subscriber terminal is located in the pCell database. For example, when the subscriber terminal is located in the handoff boundary region of the A base station, the B base station and the C base station (when the active PN received by the subscriber terminal is a PN of an A base station, a PN of a B base station, and a PN of a C base station) The PN of the A base station is included as the reference PN in the PPM data collected by the subscriber terminal while the PN of the B base station is included as the reference PN information in the pCell database of the pCell corresponding to the handoff border region.

In this case, the pCell positioning server transmits pCell data including the reference PN included in the PPM data as reference PN information among the pCell database, that is, the propagation pattern of the reference PN and PPM data of the PPM data farther than the area where the subscriber terminal is physically located Since a similar pCell is searched and corresponding latitude and longitude information is provided as a positioning result, a positioning error larger than a general pCell positioning error occurs, which causes a problem in that the accuracy of the pCell positioning in the handoff border region is lowered.

In order to solve the above-described problems, in the present invention, when the pCell database is constructed, if there are two or more active PNs having a signal-to-noise ratio equal to or higher than a certain reference value in PPM data corresponding to predetermined low- And setting the reference PN information of the pCell corresponding to the predetermined small-diameter data.

According to an aspect of the present invention, there is provided a server for constructing a pCell database, comprising: a communication unit for providing a data transmission / reception function with a position calculation server; And receiving, when the PPM data includes a plurality of active PNs (Pseudo Noise) having a signal-to-noise ratio equal to or greater than a predetermined reference value, receiving the PPM (Pilot Phase Measurement) data and the lightness data from the position calculation server through the communication unit, And setting the active PN of the pCell database to a plurality of reference PN information of the pCell corresponding to the radius data in the pCell database.

According to another aspect of the present invention, there is provided a method for constructing a pCell database in a pCell positioning server, the method comprising the steps of: (a) receiving PPM data and latitude data from a position calculation server; Pseudo noise) is included in the PPM data; And (b) if the PPM data includes a plurality of active PNs, setting the plurality of active PNs as a plurality of reference PNs of the pCell corresponding to the lightness data in the pCell database, Lt; RTI ID = 0.0 > pCell < / RTI > database that improves positioning accuracy.

As described above, according to the present invention, when the pCell positioning server transmits the reference PN of the PPM data as well as the neighbor PN corresponding to the active PN as the reference PN to the pCell database for the handoff boundary region between the base stations having a plurality of active PNs Therefore, there is an effect that the pCell positioning of the mobile communication terminal located in the coverage area of the handoff can be accurately performed.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

4 is a block diagram schematically showing a configuration of a pCell positioning system according to an embodiment of the present invention.

The pCell positioning system according to an embodiment of the present invention includes a position calculation server 410 and a pCell positioning server 420.

Upon receiving the location location request from the pCell positioning server 420, the location calculation server 410 requests the mobile communication terminal (not shown) to collect the PPM data, receives the PPM data from the mobile communication terminal (not shown) And provides the pCell positioning server 420 with the PPM data and the latitude and longitude data of the area where the mobile communication terminal (not shown) is located.

When the pCell positioning server 420 constructs the pCell database, the position calculation server 410 provides the pCell positioning server 420 with the PPM data and the radius data for each pCell ID. Here, the latitude and longitude data is the latitude and longitude data of the area where the mobile communication terminal (not shown) measuring the PPM data is located.

The PPM data includes a system ID (SID), a mobile communication network ID (NID), a base station ID (BS-ID), a reference PN (Ref_PN) which is a sector number of a currently serving base station, Phase and signal-to-noise ratios, adjacent PNs that are sector numbers of adjacent base stations, pilot phases within each adjacent PN, and signal-to-noise ratios.

The pCell positioning server 420 constructs and stores the pCell database and receives the pCell positioning request from the mobile communication terminal (not shown), which is a subscriber terminal, from the position calculation server 410 to the PPM data of the mobile communication terminal And extracts the location-related positioning data and compares it with the pCell database. Here, the pCell positioning server 420 selects a pCell having a pattern most similar to the PPM data among a plurality of pCells, and uses the selected pCell as a location measurement result.

In the present invention, the pCell positioning server 420 receives the PPM data and the latitude and longitude data from the position calculation server 410 in order to construct the pCell database. If the PPM data includes a plurality of active PNs having a signal-to- , And sets a plurality of active PNs in the pCell database as a plurality of reference PN information of pCell corresponding to the above-mentioned latitude and longitude data. It goes without saying that the pCell positioning server 420 establishes a pCell database.

Here, the pCell positioning server 420 compares the signal-to-noise ratios of the plurality of PNs included in the PPM data with a predetermined reference value to check whether the PPM data includes a plurality of active PNs.

In the present invention, the plurality of PNs include the reference PN included in the PPM data and one or more adjacent PNs, and the predetermined reference value is preferably an active PN setting reference, that is, a value between -12 dB and -13 dB. Here, since the reference PN of the PPM data is the PN of the currently serving base station, its signal-to-noise ratio is greater than the active PN setting reference. Therefore, the reference PN of the PPM data is unconditionally active PN.

On the other hand, if the pCell positioning server 420 includes one active PN (when only the reference PN of the PPM data is active PN) in the PPM data, a plurality of active PNs are transmitted from the pCell database to the pCell database corresponding to the above- It is set as one reference PN information.

When the pCell positioning server 420 constructs the pCell database with the above configuration, not only the reference PN of the PPM data measured in the handoff boundary region between the base stations having a plurality of active PNs but also the neighbor PN corresponding to the active PN even if any one of the plurality of active PNs included in the PPM data of the mobile communication terminal (not shown) located at the handoff boundary region becomes the reference PN, Lt; RTI ID = 0.0 > pCell < / RTI >

Accordingly, the pCell positioning server 420 can correctly perform the pCell positioning of the mobile communication terminal (not shown) located in the handoff boundary region between the base stations.

5 is a block diagram schematically illustrating an internal configuration of a pCell positioning server according to an embodiment of the present invention.

The pCell positioning server 420 according to the embodiment of the present invention includes a communication unit 510, a control unit 520, and a data storage unit 530.

The communication unit 510 is a network interface for connecting the communication path between the external device and the pCell positioning server 420, and provides a data transmission / reception function with the position calculation server 410.

The control unit 520 controls the overall function of the pCell positioning server 420 by executing and controlling the driving program stored in the data storage unit 710 according to the signal input through the key input unit .

In the present invention, the control unit 520 receives the PPM data and the latitude and longitude data from the position calculation server 410 through the communication unit 510 to construct a pCell database. When PPM data includes a plurality of active PNs having a signal- , A plurality of active PNs are set in the pCell database as a plurality of reference PN information of pCell corresponding to the above-mentioned latitude and longitude data. The signal-to-noise ratio of a plurality of PNs included in the PPM data is compared with a predetermined reference value to check whether the PPM data includes a plurality of active PNs.

In the present invention, the predetermined reference value is preferably an active PN setting reference, that is, a value between -12 dB and -13 dB.

On the other hand, if one active PN (when only the reference PN of the PPM data is active PN) is included in the PPM data, the control unit 520 sets one active PN to one of pCell corresponding to the above- It is set as reference PN information.

The data storage unit 530 stores a driving program and the like of the pCell positioning server 420.

In the present invention, the data storage unit 530 stores the pCell database.

6 is a flowchart illustrating a process of constructing a pCell database in a pCell positioning server according to an embodiment of the present invention.

The pCell positioning server 420 receives the PPM data and the latitude and longitude data from the position calculation server 410 and checks whether there are a plurality of active PNs whose signal-to-noise ratios are equal to or greater than a predetermined reference value in the PPM data (S610 and S620). Here, the pCell positioning server 420 compares the signal-to-noise ratios of the plurality of PNs included in the PPM data with a predetermined reference value to check whether the PPM data includes a plurality of active PNs.

If a plurality of active PNs are included in the PPM data in step S620, the pCell positioning server 420 sets a plurality of active PNs in the pCell database as a plurality of reference PN information of the pCell corresponding to the latitude and longitude data (S630 ). Here, the constant reference value is preferably an active PN setting reference, that is, a value between -12 dB and -13 dB.

If one active PN is included in the PPM data that does not include a plurality of active PNs, that is, the PPM data, in step S620, one active PN is allocated to one reference of pCell corresponding to the above- PN information is set (S640).

7 is a diagram illustrating a conventional pCell database for a handoff border region and a pCell database according to an embodiment of the present invention.

When the subscriber station is located in the handoff boundary region of the A base station PN2, the B base station PN4, and the C base station PN7, if the PN of the A base station is included as the reference PN in the PPM data collected by the subscriber terminal, 7A, PN2, which is the PN of the A base station, is set as the reference PN information of the conventional pCell database.

However, in the embodiment of the present invention, among the plurality of PNs included in the PPM data, PN2 as the PN of the A base station, PN4 as the PN of the B base station, and PN7 as the PN of the C base station, Even if the reference PN of the PPM data measured by the subscriber terminal located in the handoff boundary region of the A base station, the B base station and the C base station becomes PN4 or PN7, the base PN information of the pCell database for the handoff boundary region . ≪ / RTI >

Accordingly, the pCell positioning server 420 can provide a pCell positioning result more accurate than the conventional one for the subscriber terminal located in the handoff boundary region. Here, it is preferable that the pCell positioning server 420 performs the pCell positioning by considering the reference PN information excluding the reference PN information matching the reference PN of the PPM data as the neighbor PN information at the pCell positioning of the subscriber terminal.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

INDUSTRIAL APPLICABILITY As described above, the present invention is applied to a location-based service field, in which a pCell location server transmits not only a reference PN of PPM data to a pCell database for a handoff boundary region between a plurality of active PNs, Since the neighboring PN is stored as the reference PN, it is a very useful invention for generating the effect of accurately positioning the pCell of the mobile communication terminal located in the handoff boundary region.

1 is a flowchart showing a network-based positioning method using a pCell database,

2 is a flow chart illustrating a conventional method for building a pCell database,

3 is a diagram exemplifying the division of a location measurement service area by pCell,

4 is a block diagram schematically showing a configuration of a pCell positioning system according to an embodiment of the present invention.

5 is a block diagram schematically showing an internal configuration of a pCell positioning server according to an embodiment of the present invention;

6 is a flowchart illustrating a process of building a pCell database in a pCell positioning server according to an embodiment of the present invention.

 7 is an exemplary diagram illustrating a conventional pCell database for a handoff border region and a pCell database according to an embodiment of the present invention.

Description of the Related Art

410: Position calculation server 420: pCell positioning server

510: communication unit 520:

530: Data storage unit

Claims (6)

A communication unit for providing a data transmission / reception function with the position calculation server; And (PPM) data from the position calculation server through the communication unit, and determines whether or not the PPM data includes at least two active PNs having a signal-to-noise ratio of a predetermined reference value or more, The control unit sets the at least two active PNs in the pCell database as the reference PN information of the pCell corresponding to the lightness data, And a server for storing the pCell database. The method according to claim 1, Wherein the constant reference value is a signal-to-noise ratio (SNR) value that is any one of -12 dB to -13 dB. The method according to claim 1, Wherein the at least two active PNs include a reference PN and one or more neighboring PNs included in the PPM data. Upon receipt of the PPM data and the latitude and longitude data from the position calculation server, confirming whether or not an active PN (Pseudo Noise) having a signal-to-noise ratio equal to or greater than a predetermined reference value is included in the PPM data; And Setting the at least two active PNs as reference PN information of pCell corresponding to the lightness data in the pCell database if the PPM data includes more than two active PNs The method comprising the steps of: 5. The method of claim 4, Setting one active PN as the reference PN information of the pCell if the PPM data includes one active PN; The method comprising the steps of: 5. The method of claim 4, Wherein the constant reference value is one of -12 dB to -13 dB.
KR1020080094498A 2008-09-26 2008-09-26 Server and Method for Building pCell Database KR101503488B1 (en)

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Publication number Priority date Publication date Assignee Title
KR101440834B1 (en) 2010-07-05 2014-09-18 에스케이텔레콤 주식회사 Method And Apparatus for Updating Database for Wireless LAN Based Positioning
KR101495503B1 (en) * 2010-09-20 2015-02-26 에스케이텔레콤 주식회사 Method for Estimating Azimuth, Apparatus And Computer-Readable Recording Medium with Program Therefor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050033790A (en) * 2003-10-07 2005-04-13 (주)네오링크 Method of improving accuracy of position measurement in the bts based environment comprising a relay
KR100573203B1 (en) 2004-03-17 2006-04-24 에스케이 텔레콤주식회사 Method and System for Determining Position of Terminal by Using Location Detector in GPS Satellite-Invisible Area
KR100590987B1 (en) 2004-06-18 2006-06-19 에스케이 텔레콤주식회사 Method and System for Determining Position of Mobile Communication Terminal and Measuring Communication Quality of Determined Position by Using A-GPS Mode
KR20080045533A (en) * 2006-11-20 2008-05-23 에스케이 텔레콤주식회사 Method and system for providing location information to mobile communication terminal on boundary area of mobile switching center

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050033790A (en) * 2003-10-07 2005-04-13 (주)네오링크 Method of improving accuracy of position measurement in the bts based environment comprising a relay
KR100573203B1 (en) 2004-03-17 2006-04-24 에스케이 텔레콤주식회사 Method and System for Determining Position of Terminal by Using Location Detector in GPS Satellite-Invisible Area
KR100590987B1 (en) 2004-06-18 2006-06-19 에스케이 텔레콤주식회사 Method and System for Determining Position of Mobile Communication Terminal and Measuring Communication Quality of Determined Position by Using A-GPS Mode
KR20080045533A (en) * 2006-11-20 2008-05-23 에스케이 텔레콤주식회사 Method and system for providing location information to mobile communication terminal on boundary area of mobile switching center

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