KR20060024997A - Mobile communication terminal and system for providing location based service - Google Patents

Abstract

The present invention relates to a technology related to a mobile communication terminal, and more particularly, to a technology for providing information on an improved location area when the mobile communication terminal is located in a cell overlap region.

According to an embodiment of the present invention, a mobile communication terminal for providing location information service in a cell boundary area includes an overhead message receiving unit configured to receive an overhead message from a communication base station; A communication base station detecting unit detecting a communication base station for a predetermined time; A base station information extracting unit for extracting base station information for at least two communication base stations detected by the communication base station detecting unit from the overhead messages received by the overhead message receiving unit; A base station information transmission processor for transmitting at least two base station information extracted by the base station information extraction unit; And a location information display processor configured to display and process map information received on at least two base station information transmitted by the base station information transmission processor.

Mobile terminal, location information service, base station, cell, overhead message.

Description

Mobile communication terminal and system for providing location information service

1A, 1B, and 1C illustrate examples of location map information provided when a conventional mobile communication terminal is located in a cell boundary region.

2 is a network configuration diagram schematically showing a system for providing location information according to an embodiment of the present invention.

3 is a block diagram schematically illustrating a configuration of a system for providing location information according to an exemplary embodiment of the present invention.

4A and 4B illustrate an example of a method of indicating location map information provided when a mobile communication terminal is located in a cell boundary area according to an exemplary embodiment of the present invention.

The present invention relates to a technology related to a mobile communication terminal, and more particularly, to a technology for providing information on an improved location area when the mobile communication terminal is located in a cell overlap region.

A conventional mobile communication terminal uses map messages based on an LBS (Location Based Service) based location information service using an overhead message received through an overhead channel from a base station. To be provided. Accordingly, the terminal user can determine the surrounding situation through the map information on the provided cell area.

However, since the mobile communication terminal may receive an overhead message from each base station when the mobile communication terminal is located at the cell boundary (overlapping area) as shown in FIG. Difficult to provide That is, the mobile communication terminal is provided with map information centered on the base station of any cell as shown in (b) or (c) of FIG.

An object of the present invention is to provide a mobile communication terminal and a system capable of servicing map information on an area suitable for a location when located in a boundary area of a plurality of cells.

According to an aspect of the present invention, a mobile communication terminal detects a communication base station located in each cell at a cell boundary area, receives base station information therefrom, and transmits the received base station information to a location map information providing system. According to an aspect, a system for providing location map information combines base station information and transmits map information of a corresponding location area to a mobile communication terminal. The mobile communication terminal receives and displays location map information.

According to this aspect of the present invention, even when the mobile communication terminal is located in the cell boundary region, it is possible to provide improved map information with reduced error range for the location region.

The foregoing and further aspects of the present invention will become more apparent through the preferred embodiments described with reference to the accompanying drawings. Hereinafter, the present invention will be described in detail to enable those skilled in the art to easily understand and reproduce the present invention.

FIG. 2 is a network configuration diagram schematically showing a system for providing location information according to an embodiment of the present invention. As shown, the system for providing location information includes a mobile communication terminal and a system for providing location map information. When the mobile communication terminal is located in the cell boundary region, if a user requests a location information service based on the LBS, the base station information of the cells including the boundary region is collected and provided to the location map information providing system.

The location map information providing system that receives the base station information through the mobile communication network extracts the map information of the appropriate area based on each base station information and transmits it to the mobile communication terminal. The mobile communication terminal displays the received map information on the screen.

The configuration of the mobile communication terminal and the location map information providing system will be described in more detail with reference to FIG. 3. The mobile communication terminal basically includes a keypad 110, a display unit 120 for displaying a menu and an operation state, a wireless communication unit 130 for extracting voice and data signals from a wireless signal transmitted and received through an antenna, and the wireless communication unit. And a typical mobile communication terminal such as a voice input / output circuit 140 for inputting / outputting a voice call signal from 130 through a microphone and a speaker, and a controller 170 and a memory 160 for controlling the entire system.

The display unit 120 may be, for example, a display device such as a liquid crystal display device. The wireless communication unit 130 is configured to include an antenna and RF circuit for communication with the base station. The voice input / output circuit 140 is a well-known configuration that processes digital voice data into an analog voice signal or vice versa, and includes an additional circuit such as an audio amplification circuit or a filter.

The baseband circuit of the wireless communication unit 130 and most of the circuits of the control unit 170 are commercially provided as a single integrated circuit. This integrated circuit, commonly referred to as an MSM chip, includes internally dedicated hardware for processing communications, a digital signal processor and a general purpose microprocessor. Each part constituting the control unit 170 may be configured by dedicated hardware or software or a mixture thereof.

According to a characteristic aspect of the present invention, the mobile communication terminal 100 for providing location information service in a cell boundary area in an idle state includes an overhead message receiver 171 for receiving an overhead message from a base station, and An overhead message received by the overhead message receiver 171 for base station information for at least two communication base stations sensed by the communication base station detector 173 and the communication base station detector 173 for detecting the communication base station for a time period. A base station information extracting unit 175 which extracts from the base station information extracting unit 175, at least two base station information extracted by the base station information extracting unit 175, to the location map information providing system 200, and Location for displaying and processing location area map information received for at least two base station information transmitted by the base station information transmission processing unit 177 And a correction display processing unit (179).

The overhead message receiver 171 receives the overhead message through the wireless communication unit 130 for each slot period in a slotted mode through a known overhead channel from a base station in a cell where the mobile communication terminal 100 is located. . The received overhead message is used as information for the mobile communication terminal 100 to receive location information, which will be described later.

For reference, an overhead channel of a CDMA mobile communication system includes a pilot channel, a synchronization channel, and a paging channel as a forward link, and an access channel as a reverse link. The pilot channel is a reference channel used by a mobile station (mobile communication terminal) as a phase reference for system acquisition, timing and synchronous modulation. The synchronization channel is used in the mobile communication system acquisition phase, and is a channel used by the mobile station to initialize an initial time with the base station. The paging channel carries messages such as overhead, calls, commands, channel assignments, etc. from the base station to the mobile station. The access channel is used for the mobile station to respond to the initialization (registration and call initiation) and paging channels in communication with the base station.

The overhead message is one of the above four messages transmitted by the base station on the paging channel, and includes a system parameter message, an access parameter message, a CDMA channel list message, a neighbor list message, an extended system parameter message, and a global service redirection message. . The System Parameter Message includes a Pilot PN offset, a System ID and Network ID, location registration information, base station information, slot mode information, handoff information, and power control information. Information necessary for obtaining location information to be used.

The communication base station detector 173 preferably detects a communication base station with which the mobile communication terminal 100 communicates, that is, an active base station, for a predetermined time. This is a prerequisite for obtaining more accurate location information when the mobile communication terminal 100 is located in the cell boundary region.

When the mobile communication terminal 100 is located in the cell boundary region, the base station to be activated may be changed, which causes the mobile communication terminal to receive an overhead message from different base stations in charge of the cell boundary region for a predetermined time. . Therefore, when the mobile communication terminal 100 uses the base station information that is received only at one point in time by the overhead message receiving unit 171 as in the prior art, the position information having a large error range is obtained.

For this reason, the communication base station detector 173 detects whether the communication base station transmitting the overhead message used for more accurate location information change. According to an aspect, the communication base station detector 173 detects a communication base station with the mobile communication terminal 100 by sensing the received signal strength of the pilot channel. Since the mobile communication terminal 100 is handed off according to the received signal strength of the pilot channel, the mobile communication terminal 100 can detect the communication base station by detecting the received signal strength of the pilot channel. Since the received signal strength detection method itself of the pilot channel is a well-known technique, a detailed description thereof will be omitted.

The base station information extracting unit 175 receives the overhead messages received from each communication base station for a predetermined time in the overhead message receiving unit 171, and extracts each base station information (latitude / longitude information) therefrom. The base station information transmission processor 177 converts the base station information extracted by the base station information extraction unit 175 according to a transmission scheme and transmits the converted base station information to the location map information providing system 200 through the wireless communication unit 130.

The location information display processing unit 179 displays the improved map information having the location area of which the error range is reduced according to the present invention, which the mobile communication terminal 100 receives from the location map information providing system 200 which will be described later, on the display unit 120. The display unit 120 performs the display processing on the display unit 120.

Next, the configuration of the location map information providing system 200 will be described. As shown in FIG. 3, the base station information receiving unit 210 includes a base station information receiving unit 210, a map information extracting unit 220, and a map information providing unit 230. .

The base station information receiver 210 receives at least two base station information transmitted by the base station information transmission processor 177 of the mobile communication terminal 100 through the communication unit 240. The map information extractor 220 extracts map information of the corresponding location area from the map information database 250 according to the base station information (latitude / longitude information) in the base station information receiver 210.

According to an embodiment, when the mobile communication terminal 100 is located at the boundary area of two cells (circles of thin solid lines) as shown in FIG. 4A, the map of the location map information providing system 200 is located. The information extracting unit 220 maps information about an area in which a location based on a center point of a line connecting two base stations, based on the received base station information of two cells and the latitude / longitude information of the base station according to an aspect, is included in the central region. Is extracted from the map information database 250. As such, an example of the map area extracted from the map information database 250 is illustrated by a thick solid line.

On the other hand, when the mobile communication terminal 100 is located in the boundary region of three cells, as shown in FIG. 'Or' weight center ', and other desirable center points) may be extracted from the map information database 250 for map information on the area included in the central area.

The map information provider 230 converts the map information extracted by the map information extractor 220 according to a transmission method and transmits the converted map information to the mobile communication terminal 100. As described above, the mobile communication terminal 100 receives map information, processes the display information on the display screen, and displays the map information on the display unit 120.

Accordingly, even when the mobile communication terminal is located in the cell boundary region, when there is a request for location information, it is possible to provide improved map information having a location region with a reduced error range.

Referring to an embodiment of the process of providing the location information of the mobile communication terminal as described above, first, the user of the mobile communication terminal selects "location map information service" on the menu through the operation of the keypad 110. According to a user selection, the communication base station detecting unit 173 detects a communication base station with which the mobile communication terminal 100 communicates for a predetermined time. This is a prerequisite for receiving more accurate location information because the communication base station may be changed instantaneously when the mobile communication terminal 100 is located in the boundary region of the cell as described above.

The overhead message receiver 171 receives the overhead messages transmitted from at least two communication base stations sensed by the communication base station detector 173 through the wireless communication unit 130. The base station information extractor 175 receives at least two or more overhead messages from the overhead message receiver 171 and extracts base station latitude / longitude information therefrom. Next, the base station information transmission processor 177 transmits at least two base station latitude / longitude information extracted by the base station information extraction unit 175 to the location map information providing system 200 through the wireless communication unit 130.

Herein, the communication channel may be formed between the mobile communication terminal 100 and the location map information providing system 200 when the terminal user selects the above-described "location map information service", or otherwise, the mobile communication terminal 100. May be formed at a point in time to transmit the base station latitude / longitude information to the location map information providing system 200. However, the formation of the communication channel is not limited thereto, and it is preferable that the communication channel be formed at the most suitable time for implementing the present invention.

The base station location map information providing system 200 extracts map information having a corresponding area as described above based on at least two base station latitude / longitude information transmitted from the mobile communication terminal 100 and performs mobile communication through a communication channel. To the terminal 100. The location information display processing unit 179 of the mobile communication terminal 100 processes the received map information according to the display screen and displays the processed map information on the display unit 120.

As described above, the location information providing system processes a series of processes as described above to provide improved map information having a location area having a reduced error range when the mobile communication terminal 100 is located at a cell boundary area.

As described above, the present invention can provide improved map information having a location area where the error range is reduced even when the mobile communication terminal is located at the cell boundary area.

On the other hand, the present invention has been described with reference to the embodiments shown in the drawings, which are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be defined only by the appended claims.

Claims (10)

A mobile communication terminal for providing location information service in a cell boundary area in an idle state, An overhead message receiver for receiving an overhead message from a communication base station; A communication base station detecting unit detecting a communication base station for a predetermined time; A base station information extracting unit for extracting base station information for at least two communication base stations detected by the communication base station detecting unit from the overhead messages received by the overhead message receiving unit; A base station information transmission processor for transmitting at least two base station information extracted by the base station information extraction unit; A location information display processing unit which displays and processes map information received for at least two base station information transmitted by the base station information transmission processing unit; Mobile communication terminal for providing a location information service comprising a. The mobile communication terminal of claim 1, wherein the communication base station detector detects a signal of a pilot channel to detect a communication base station. The mobile communication terminal of claim 1 or 2, wherein the base station information is latitude / longitude information. In the location map information providing system for servicing location map information, A base station information receiver configured to receive at least two base station information transmitted from a mobile communication terminal; A map information extracting unit extracting map information of a corresponding location area based on base station information received by the base station information receiving unit; A map information providing unit providing map information extracted by the map information extracting unit to the mobile communication terminal; Location map information providing system for servicing location map information comprising a. The system of claim 4, wherein the base station information is latitude / longitude information. The method of claim 5, wherein the extracting of the map information of the corresponding location area by the map information extractor extracts map information of an area where a central location from each base station is included in the central area. Location Map Information System. A location information providing system comprising a mobile communication terminal for implementing a location information service in a cell boundary area in an idle state and a location map information providing system for serving location map information, the mobile communication terminal comprising: An overhead message receiver for receiving an overhead message from a communication base station; A communication base station detecting unit detecting a communication base station for a predetermined time; A base station information extracting unit for extracting base station information for at least two communication base stations detected by the communication base station detecting unit from the overhead messages received by the overhead message receiving unit; A base station information transmitting processor for transmitting at least two base station information extracted by the base station information extracting unit to the location map information providing system; And a location information display processor configured to display and process map information received from the location map information providing system with respect to at least two base station information transmitted by the base station information transmission processor. The location map information providing system has: A base station information receiver configured to receive at least two base station information transmitted from the mobile communication terminal; A map information extracting unit extracting map information of a corresponding location area from base station information received by the base station information receiving unit; A map information providing unit providing map information extracted by the map information extracting unit to the mobile communication terminal; Position information providing system comprising a. The system of claim 7, wherein the communication base station detector detects a signal of a pilot channel to detect a communication base station. 10. The system of claim 7 or 8, wherein the base station information is latitude / longitude information. The system of claim 9, wherein the map information extracting unit extracts map information of a corresponding location area, and extracts map information of an area where a central location from each base station is included in a central area.

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