KR200323782Y1 - System for tracking a position of a mobile station using an access channel receiver - Google Patents

Abstract

The present invention relates to a location tracking system of a mobile communication terminal using an access channel receiver to enable more accurate location tracking even when using a conventional general mobile communication terminal. A plurality of access channel receivers configured to receive a radio signal transmitted through an access channel of the mobile communication terminal and detect a reception strength and a terminal ID of the radio signal; Stores the location where each access channel receiver is installed, receives the terminal ID provided from each access channel receiver, measures the reception strength, identifies the access channel receiver with the largest reception strength, and moves the location of the identified access channel receiver. The present invention provides a positioning system of a mobile communication terminal using an access channel receiver including a positioning server detecting a current position of the communication terminal.

According to the present invention, compared with the conventional location tracking system using GPS, there is an effect that the mobile subscriber can be provided with a geography-based service without replacing the terminal. In addition, the position tracking of the mobile communication terminal is more accurate than the conventional location tracking system using the base station, and detailed location tracking for the mobile subscriber can be provided to provide more active and accurate geo-based services. It has an effect.

Description

Position tracking system of mobile communication terminal using access channel receiver {SYSTEM FOR TRACKING A POSITION OF A MOBILE STATION USING AN ACCESS CHANNEL RECEIVER}

The present invention relates to a system for tracking the location of a mobile communication terminal, and more particularly, using an access channel receiver to enable more precise location tracking using a separate access channel receiver instead of a conventional mobile communication base station. The present invention relates to a location tracking system of a mobile communication terminal.

As is well known, a mobile communication terminal is wirelessly connected to a mobile communication base station that manages a predetermined cell area to perform voice call and data communication through a mobile communication exchange. In addition, the mobile communication exchange registers location information on a mobile communication terminal connected to each base station to a VLR (Visitor Location Register) and a HLR (Home Location Register) to track a real-time movement path of a mobile subscriber.

Recently, a location based service (LBS) has been implemented to detect a location of a mobile communication subscriber in real time and automatically transmit various information about a corresponding area to a mobile communication terminal. In providing the location-based service, the accuracy of the location information for the mobile communication terminal is an important factor in determining the level of the location-based service. That is, the greater the error range of the location information of the mobile communication terminal, the more accurate location-based service becomes impossible.

As a location detection method of a mobile communication terminal currently used to provide such a location-based service, a base station cell ID that calculates a final location by combining a global positioning system (GPS) and location data of a mobile communication terminal obtained from a base station. A method is mentioned.

1 is a block diagram showing the configuration of a location tracking system using a GPS satellite according to the prior art. As shown, when the subscriber operates the GPS receiver 303 by pressing a specific button of the terminal, the GPS receiver 303 mounted on the terminal has at least three GPS points (four or more points to obtain a three-dimensional position). Receiving a signal from the satellite 301 to calculate the distance (R1, R2, R3, R4) between the terminal and each satellite, and calculates the position of the terminal using the additional information received from the GPS satellite 301.

The calculated position is automatically sent to the application server 305 which needs the subscriber's location information after passing through the mobile communication switching center 304 using the cellular network.

Such a method has an advantage of enabling accurate position detection according to a GPS signal by using a mobile communication terminal incorporating a GPS module or a mobile communication terminal connected to a separate external GPS. However, in this case, since the mobile subscriber must separately purchase a terminal with an embedded GPS module or an external GPS module, not only the economic burden on the subscriber side but also the GPS module must use the power of the terminal battery. There is a growing problem.

In addition, the signal transmitted from the GPS satellite becomes a very weak signal when it reaches the terminal on the earth, so it is difficult to receive the GPS signal when there is an obstacle between the terminal and the GPS satellite such as indoors, underground, or between urban buildings. There is a problem that an unidentifiable shadow area occurs.

On the other hand, there are various methods that do not require modification of the terminal. Among them, a method that is frequently used includes a method of using arrival time, a method of using reception angle, and a method of using arrival time difference.

In the method using the arrival time, as shown in FIG. 2, a signal transmitted from the terminal 402 is received by several base stations 401 around the terminal, and the arrival time of the signal received by each base station 401 is measured. After calculating distances R1, R2, and R3 between the terminal and the base station, a virtual circle having a radius of the distance is drawn around the base station, and the point where these circles cross is estimated as the location of the terminal. However, in this case, at least three or more base stations around the terminal should be used. If the subscriber is located in a suburban area, the location tracking is not easy because there are not three or more base stations nearby. Since the cell area is relatively large, the error range becomes relatively large, thereby making it impossible to accurately detect the position of the mobile communication terminal.

Solving the above problem is a positioning mobile communication repeater for tracking the location of the terminal of the Publication No. 2002-0023725. It is composed of a repeater and an access channel receiver, as shown in FIG. The repeater is located at a remote location and has a maintenance terminal for managing it. The repeater transmits the received terminal signal to the access channel receiver (12), and the maintenance terminal 13 provides the reference clock 10 and the communication porter 11 to the access channel receiver. This has the advantage that it is possible to determine the precise position than the conventional method using the base station, there is a problem that must be replaced the repeater equipment currently operating and precise positioning than the repeater level is impossible.

In addition, the repeater is usually installed so that radio waves can be transmitted to the shaded area, the design is to combine the access channel receiver in the repeater, there is a problem that the applicable area is limited to a specific location where the repeater is installed.

Accordingly, the present invention has been made to solve the above problems, and to provide a location tracking system of a mobile communication terminal using an access channel receiver to enable a more precise location tracking even if a conventional mobile communication terminal is used. There is this.

Another object of the present invention is to provide a location tracking system of a mobile communication terminal using an access channel receiver capable of independent installation without being limited to the installation location.

According to an embodiment of the present invention for achieving the above object,

In a system for tracking the location of a mobile communication terminal, a plurality of base stations may be installed within a cell area of a base station, and receive a radio signal transmitted through an access channel of the mobile communication terminal to receive the strength of the radio signal and the terminal. A plurality of access channel receivers for detecting IDs; Pre-store a location where each of the access channel receivers are installed, receive a terminal ID provided from each of the access channel receivers, measure a reception strength, identify an access channel receiver having the largest reception strength, and identify the identified access channel receiver It provides a positioning system of a mobile communication terminal using an access channel receiver configured to include a positioning server for detecting the position of the mobile communication terminal as a current position of the mobile communication terminal.

According to another embodiment of the present invention for achieving the above object,

In the system for tracking the position of the mobile communication terminal, a plurality of base stations can be installed in the cell area of the base station, and receives the sync channel transmitted from the mobile communication base station to synchronize with the mobile communication network access channel of the mobile communication terminal A plurality of access channel receivers for receiving a radio signal transmitted through the network and detecting a reception strength and a terminal ID of the radio signal; Pre-store a location where each of the access channel receivers are installed, receive a terminal ID provided from each of the access channel receivers, measure a reception strength, identify an access channel receiver having the largest reception strength, and identify the identified access channel receiver It provides a positioning system of a mobile communication terminal using an access channel receiver configured to include a positioning server for detecting the position of the mobile communication terminal as a current position of the mobile communication terminal.

1 is a block diagram showing the configuration of a location tracking system using a GPS satellite according to the prior art,

2 is a block diagram showing the configuration of a location tracking system using a base station according to the prior art,

3 is a block diagram showing the configuration of a location tracking system using a repeater according to the prior art,

4 is a block diagram showing the overall configuration of a location tracking system according to an embodiment of the present invention,

5 is a flowchart showing the overall operation of the position tracking system of the present invention,

6 is a block diagram showing the overall configuration of a location tracking system according to another embodiment of the present invention.

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

50: mobile communication terminal 100: access channel receiver

111, 151: antenna 112: receiver

113: sensitivity adjustment unit 121: RF reception strength measurement unit

122: control unit 123: terminal information recognition unit

130: output unit 150: sync channel receiving block

152: synchronization signal detection unit 200: positioning server

210: terminal-ACR matching block 220: AC receiver DB

230: location information DB

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

4 is a block diagram showing the overall configuration of the location tracking system of a mobile communication terminal according to an embodiment of the present invention, the mobile communication terminal 50, an access channel receiver (hereinafter referred to as an AC receiver) 100 and the positioning server 200 is shown.

First, the AC receiver 100 is a separate device designed to have the same function as the access channel reception function of the base station of the conventional mobile communication system. The AC receiver 100 is provided from the mobile communication terminal 50 through the access channel of the mobile communication terminal 50. Receives a radio signal of. Here, the access channel means a channel used in the reverse link (from the mobile terminal to the base station) to perform information exchange with the base station in all cases except when the mobile communication terminal is busy. Typically, a mobile communication terminal responds to a call from a base station or transmits a specific request message through the access channel, and in this transmission process, the mobile communication terminal uses a mobile identification number (MIN) or a serial number (ESN). By transmitting electrical serial number together, each base station can identify each mobile communication terminal.

The internal structure of the AC receiver 100 having such an access channel reception function may be divided into an access channel receiving block 110, a signal processing block 120, and an output unit 130 as shown in FIG. 4 according to its function. have. Here, the access channel receiving block 110 is composed of an antenna 111, the receiving unit 112, the sensitivity adjusting unit 113, the signal processing block 120 is the RF receiving strength measuring unit 121, the control unit 122, It consists of a terminal information recognition unit 123.

The present invention is a system that configures the AC receiver as an independent device to control a cell smaller than the repeater level. In case of using existing AC receiver which inputs only effective strength signal as it is, duplication problem of cell occurs. In this design, we change RF receiver to receive wireless signal of all strength and install RF receiving strength measuring unit to measure the strength of input signal. This problem is solved by identifying the cell of the largest signal.

Referring to Figure 4 will be described in detail with respect to each configuration means constituting the AC receiver 100 and the positioning server 200 as follows.

First, the antenna 111 in the AC receiver 100 is a means for receiving a radio signal transmitted from the mobile communication terminal 50 through an access channel. Typically, since the mobile communication terminal 50 transmits a radio signal through a self-directed omni-directional antenna, it is possible to receive the radio signal at a place other than the base station.

The receiver 112 is connected to the antenna 111 and is a means for performing RF processing on a radio signal received from the antenna 111. The receiver 112 may access all access channels for a plurality of mobile communication terminals received through the antenna 111. Monitor the slots of each channel for reception. In addition, the sensitivity adjusting unit 113 is an additional means provided to adjust the reception sensitivity of the antenna 111 so that the size of the cell under the control of the AC receiver 100 can be finely adjusted.

On the other hand, the radio signal of the mobile communication terminal 50 received through the above-described antenna 111 and provided to the receiver 112 is provided to the controller 122 in the signal processing block 120, the controller 122 is AC Means for controlling the overall operation of the receiver 100. The control unit 122 transmits the radio signal of the mobile communication terminal 50 provided through the receiving unit 112 to the terminal information recognizing unit 120 and the RF reception strength measuring unit 121. First, the terminal information recognizing unit 123 ) Extracts the ID of the mobile communication terminal 50 included in the radio signal and transfers it to the control unit 122 again. In addition, the RF reception strength measurement unit 121 measures the size of the signal for the wireless signal received from the mobile communication terminal 50 and transmits the measurement result to the control unit 122. The output unit 130 is connected to the positioning server 200 to be described later is a kind of transmitting information about the ID and signal size of the mobile communication terminal 50 provided from the control unit 122 to the positioning server 200 It is a means of communication.

Each of the AC receivers 100 including each of these components is installed in a single base station cell, which enables more accurate location tracking than the conventional location tracking method using the base station. In addition, as the installation density of the AC receiver 100 increases, more accurate location tracking of the mobile communication terminal 50 becomes possible.

On the other hand, the positioning server 200 is a means for determining the exact position of the mobile communication terminal 50 based on the data (terminal ID and signal size) provided from the AC receiver 100 as described above. When the positioning server 200 is located near the AC receiver 100, the line L10 connecting the AC receiver 100 and the positioning server 200 to a power line communication line, a coaxial cable, or a CATV line is used. It can be configured, and if it is located in a remote place, it can be configured using a dedicated network. In FIG. 4, for convenience, only one AC receiver connected to one positioning server 200 is illustrated, but a plurality of AC receivers are installed in each base station cell area, and the positioning server 200 may include each AC receiver 100. ,…).

The terminal-ACR matching block 210 included in the positioning server 200 sorts the IDs of the mobile communication terminals transmitted from the outputs of the plurality of AC receivers 100,... Compare the received signal size of each mobile terminal. Then, by detecting the AC receiver having the largest magnitude of the received signal, the position of the specific mobile communication terminal is detected at the corresponding time. That is, the position of the AC receiver having the largest reception strength with respect to the radio signal from the mobile communication terminal 50 becomes the current location of the mobile communication terminal. The terminal-ACR matching block 210 can be configured in software in the positioning server 200.

In addition, the AC receiver DB 220 is a means of pre-stored in a database form the location and region information (for example, geographic base information including local business information, etc.) in which the plurality of AC receivers 100, ... are installed. The location information DB 230 is a means for storing location information detected using the location tracking system according to the present invention and information on the mobile communication terminal (for example, mobile communication terminal ID and time).

As a result, the positioning server 200 detects the exact position of the mobile communication terminal 50 based on the magnitude of the received signal for the mobile communication terminal 50 provided from the plurality of AC receivers 100,. It is possible to identify local information corresponding to the detected location.

FIG. 5 is a flowchart illustrating an overall operation process of the location tracking system of the present invention configured as described above. Referring to FIG. 5, the location tracking process for the mobile communication terminal 50 will be described in detail as follows. .

First, the mobile communication terminal 50 transmits a predetermined radio signal including the terminal ID to the base station at a predetermined periodic interval or when the terminal registration command is transmitted from the base station to the terminal through the access channel. The link is maintained (step S201). At this time, if the mobile subscriber owning the mobile communication terminal 50 is located in an area where the AC receivers 100, ... according to the present invention are installed (step S203), the respective AC receivers installed in the corresponding area and adjacent positions ( 100, ... antenna 111 receives radio signals transmitted through the access channel of the mobile communication terminal 50 (step S205).

The receiver 112 receives the radio signal received through the antenna 111 and transmits the radio signal to the controller 122, and the controller 122 transmits the radio signal back to the terminal information recognizing unit 120 and the RF reception intensity. Transfer to the measuring unit 121. The terminal information recognizing unit 123 extracts the terminal ID from the radio signal from the mobile communication terminal 50 and transmits the terminal ID to the control unit 122, and the RF reception strength measurement unit 121 is received from the mobile communication terminal 50. The reception intensity of the radio signal is measured and transmitted to the control unit 122 (step S207).

Therefore, the controller 122 can recognize the ID and the reception strength of the mobile communication terminal 50. The ID and the reception strength of the radio signal are transmitted to the positioning server 200 through the output unit 130. Transmit (step S209).

The operation of the AC controller 100 is the same in all the AC receivers that receive the radio signal transmitted from the mobile communication terminal 50 in the area where the mobile communication terminal 50 is located and in the adjacent area. Therefore, the positioning server 500 receives the ID information of the mobile communication terminal 50 provided from the respective AC receivers 100,... Which received the access channel of the mobile communication terminal 50, and the information on the reception strength. .

In the terminal-ACR matching block 210 in the positioning server 200, the mobile communication terminal 50 is identified using the terminal ID information provided from each AC receiver 100, ..., and then each AC receiver 100, By comparing the magnitudes of the received signals provided from ...), the AC receiver having the greatest strength of the received signal is detected (step S211). At this time, the detected AC receiver becomes an AC receiver installed at the position closest to the mobile communication terminal 50.

Therefore, the positioning server 200 detects the AC receiver having the greatest intensity of the received signal, and then searches the AC receiver DB 220 for the location information on which the detected AC receiver is installed. Then, by designating the position of the retrieved AC receiver as the current position of the mobile communication terminal 50, it is possible to determine the current position of the mobile communication terminal 50 (step S213).

The location information of the mobile communication terminal 50 detected through such a process may be stored in the location information DB 230 or transmitted to another additional service server (geography-based service server, etc.) not shown to provide location-based services. (Step S215). In this case, the location data recorded in the location information DB 230 or transmitted to the geo-based service server may include the location information of the mobile communication terminal 50 as well as the ID, time, etc. of the mobile communication terminal 50. For example, a form such as "February 24, 13:30, Gangnam Department Store 3rd Floor, Terminal ID" may be exemplified. In addition, the geographic-based service server side may receive a subscriber number corresponding to the terminal ID from the mobile service provider side and provide the geographic-based service to the corresponding mobile communication subscriber.

As a result, it is possible to track the location of the mobile communication terminal 50 through each of these processes, and by installing a plurality of the above-described AC receivers 100 in one base station cell, more accurate location tracking of the mobile communication terminal is achieved. It becomes possible. Then, through the above-described step (S215) it is possible to utilize the location information for the mobile communication terminal 50 stored in the location information DB 230 for a variety of geography-based additional services. For example, if the mobile subscriber is found to be located in front of a particular fast food restaurant, the event and promotion advertisements of the fast food restaurant are transmitted to the subscriber's mobile terminal, which is more active than the existing geography-based service. It is possible to provide accurate geo-based services.

On the other hand, the embodiment described with reference to Figures 4 and 5 described above is suitable for a system that does not require synchronization between the mobile communication terminal 50 and the mobile communication base station (not shown), that is, asynchronous mobile communication system.

On the contrary, in order to apply the mobile terminal location tracking system according to the present invention to a synchronous mobile communication system in which synchronization between the mobile terminal and the mobile base station is essential, a process of synchronizing the base station with the access channel receiver is necessary. To this end, the internal configuration of the access channel receiver is also changed.

FIG. 6 is a diagram illustrating this, and further illustrates a sink channel receiving block 150 including a base station 60, an antenna 151, and a synchronization signal detector 152 as compared to the diagram shown in FIG. 4. It was. In addition, hereinafter, the antenna 111 provided in the access channel receiving block 110 and the antenna 151 provided in the sink channel receiving block 150 will be distinguished from each other. Named antenna 151.

Referring to Figure 6 describes in detail the mobile communication terminal position tracking system of the present invention according to the synchronous mobile communication system.

First, the sink channel receiving block 150 has a function of accessing a sink channel of the mobile communication base station 60 used for synchronization between the mobile communication base station 60 and the mobile communication terminal 50 in the synchronous mobile communication system. In the figure, the sink channel receiving block 150 is illustrated as a component included in the AC receiver 100. Alternatively, the sync channel receiving block 150 is configured as an independent device that is separated from the AC receiver 100, and is connected to the AC receiver 100. You may.

The second antenna 151 included in the sink channel receiving block 150 is an antenna for receiving a signal of the sink channel transmitted from the mobile communication base station 60 of the synchronous mobile communication system. Likewise, it is preferable to configure the omnidirectional antenna. In the synchronous mobile communication system, messages transmitted through the sync channel are typically protocol information, system ID, network ID, pilot channel PN offset number, long code status, system time, paging channel speed, frequency channel number, and the like. Can be.

The sync signal detector 152 is connected to the second antenna 151 to perform RF processing on the sync channel received from the second antenna 151, and then extracts a sync signal from the sync channel signal to access the channel. Transfer to the receiving unit 112 in the receiving block (110). Accordingly, the receiving unit 112 in the access channel receiving block 110 synchronizes with the mobile communication base station 60 based on the synchronizing signal provided from the synchronizing signal detecting unit 152, in which the pilot of each message in the sync channel is present. The channel PN offset number, long code status and system time are used. That is, the synchronization signal detector 152 extracts a pilot channel PN offset number, a long code status, and a system time from the sync channel signal, and transmits the extracted signal to the receiver 112. The receiver 112 uses the same to synchronize the mobile communication network with the mobile communication network. Will be corrected.

Through this process, the location tracking system as shown in FIG. 6 can receive the access channel transmitted from the mobile communication terminal 50 by synchronizing with the mobile communication network through the sync channel receiving block 150. After the synchronization process, the process of receiving the access channel transmitted from the mobile communication terminal 50 and tracking the location of the mobile communication terminal 50 is the same as the above-described process of FIG. 5.

As a result, in the case of the synchronous mobile communication system, as shown in FIG. 6, the access channel from the mobile communication terminal 50 can be received after synchronizing with the mobile communication network using the sync channel receiving block 150. Location tracking of the mobile communication terminal using the access channel receiver is possible.

In the detailed description of the present invention as described above, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the embodiments described, but should be defined by the utility model registration claims as described below and equivalents to the utility model registration claims.

As described above, according to the present invention, compared to the conventional location tracking system using GPS, the mobile communication subscriber side can receive a geographic-based service without replacing the terminal.

In addition, the position tracking of the mobile communication terminal is more accurate than the conventional location tracking system using the base station, and detailed location tracking for the mobile subscriber can be provided to provide more active and accurate geo-based services. It has an effect.

In addition, unlike the conventional position tracking system in which the access channel receiver is combined with the repeater, the access channel receiver is configured as an independent device, so that the receiver can be freely installed at a desired position without limiting the installation position, thereby providing more diverse geographic-based services. have.

Claims (7)

In the system for tracking the location of the mobile communication terminal, A plurality of access channel receivers which may be installed in a single base station cell area and receive a radio signal transmitted through an access channel of a mobile communication terminal and detect a reception strength and a terminal ID of the radio signal; Pre-store a location where each of the access channel receivers are installed, receive a terminal ID provided from each of the access channel receivers, measure a reception strength, identify an access channel receiver having the largest reception strength, and identify the identified access channel receiver Positioning system of a mobile communication terminal using an access channel receiver configured to include a location server for detecting the position of the mobile communication terminal as the current position. In the system for tracking the location of the mobile communication terminal, A plurality of base stations may be installed in a cell area and receive a sync channel transmitted from a mobile communication base station to synchronize with a mobile communication network to receive a radio signal transmitted through an access channel of a mobile communication terminal. A plurality of access channel receivers for detecting reception strength and terminal ID; Pre-store a location where each of the access channel receivers are installed, receive a terminal ID provided from each of the access channel receivers, measure a reception strength, identify an access channel receiver having the largest reception strength, and identify the identified access channel receiver Positioning system of a mobile communication terminal using an access channel receiver configured to include a location server for detecting the position of the mobile communication terminal as the current position. The method of claim 1, The access channel receiver, An antenna for receiving a radio signal from the mobile communication terminal through the access channel; A receiver for performing RF processing on the radio signal received through the antenna; A terminal information recognizing unit detecting an ID of the mobile communication terminal included in the radio signal; An RF reception strength measurement unit for measuring reception strength of the radio signal; And a control unit which transmits the terminal ID detected by the terminal information recognizing unit and the reception intensity measured by the RF receiving strength measuring unit to the positioning server through a transmission unit. Location tracking system of mobile communication terminal. The method of claim 2, The access channel receiver, A first antenna for receiving a radio signal from the mobile communication terminal through the access channel; A second antenna for receiving a radio signal from the mobile communication base station through the sync channel; A synchronization signal detector for extracting a synchronization signal from the radio signal of the sync channel received through the second antenna; A receiving unit receiving the synchronization signal through the synchronization signal detector to synchronize with the mobile communication network and performing RF processing on the radio signal received through the first antenna; A terminal information recognizing unit detecting an ID of the mobile communication terminal included in the radio signal; An RF reception strength measurement unit for measuring reception strength of the radio signal; And a control unit which transmits the terminal ID detected by the terminal information recognizing unit and the reception intensity measured by the RF receiving strength measuring unit to the positioning server through a transmission unit. Location tracking system of mobile communication terminal. The method according to claim 3 or 4, The access channel receiver, And a sensitivity adjusting unit for adjusting a reception sensitivity of the wireless signal received through the antenna. The method according to claim 3 or 4, The positioning server, An access channel receiver DB for storing a location where each of the access channel receivers is installed; Position location system of the mobile communication terminal using an access channel receiver, characterized in that it comprises a location information DB for storing the current location of the detected mobile communication terminal. The method according to claim 3 or 4, The positioning server, A system for locating a mobile communication terminal using an access channel receiver, characterized in that transmitted using a detected current position of the mobile communication terminal to a geographic service server providing a geographic based service.