KR20000039417A - Composite type terminal for measuring position using mobile communication network and method for supplying added service related to position measurement using the terminal - Google Patents

Abstract

PURPOSE: A composite type terminal and method for supplying the added service related to position measurement using the terminal are provided to easily secure a visibility range by measuring all pilot tones of a CDMA network and to measure the range of the terminal by itself using only a delay of the pilot signal and signal intensity thereof. CONSTITUTION: A cellular band reception processor(110) receives the pilot signal of used in a cellular mobile communication system and removes noises from the received pilot signal by amplification and filtering and then converts the noise removed signal to a signal of a base band. A PCS band reception processor(120) receives the pilot signal of used in a PCS communication system and removes noises from the received pilot signal by amplification and filtering and then converts the noise removed signal to a signal of a base band. A location measuring unit(130) receives the output signals of the processors(110),(120) to estimate the present location of a terminal using a delay time and pseudo distance of the output signals thereof.

Description

Positioning composite terminal using mobile communication network and method of providing additional services related to positioning

The present invention relates to a positioning composite terminal using a mobile communication network and a method for providing positioning related additional services using the same, and more particularly, to a positioning composite terminal capable of measuring the position of a terminal by using pilot signals of mobile communication base stations and the same. The present invention relates to a method for providing location related additional services.

In order to provide a conventional positioning additional service, a user uses a separate Global Position System (GPS) receiver module to find out the user's location information, and then uses the personal communication service (PCS) network. The transmission method used to transmit something like desired additional traffic information.

However, in the satellite navigation system such as GPS, the received signal was very weak at about -130 dBm. Therefore, when the line of sight is not secured, the signal itself is not caught. There is a problem that can not provide positioning services.

In addition, the installation of a GPS receiver and a GPS antenna is required, so that a user needs a payload such as a vehicle in order to find out his or her location information.

Accordingly, the present invention has been devised to solve the above problems, and it is most problematic in positioning the terrestrial network by measuring all pilot tones of a code division multiple access (CDMA) network. A complex terminal capable of easily securing a visible distance and measuring the position of the terminal by using only the delay time and the signal strength of the pilot signal transmitted from the base stations, and a method for providing the positioning-related additional service using the same; And it aims to provide a computer-readable recording medium recording a program for realizing the same.

1 is a configuration diagram of an embodiment of a mobile terminal for positioning using a mobile communication network according to the present invention.

2 is a flowchart illustrating a method for providing location related additional service using a composite terminal according to the present invention;

Explanation of symbols on the main parts of the drawings

110: cellular band reception processing unit 120: PCS band reception processing unit

130: position measuring unit

In order to achieve the above object, the present invention provides a pilot terminal of the first frequency band in a positioning hybrid terminal using a mobile communication network, receiving a pilot signal of a first frequency band used in a cellular mobile communication system. A first receiving processing means for amplifying and filtering a signal to remove noise and then downconvert to a baseband signal; Receiving a pilot signal of a second frequency band used in a Personal Communication Service (PCS) communication system, amplifying and filtering the received pilot signal of the second frequency band to remove noise, and downconverting to a baseband signal 2 receiving processing means; And a delay time of pilot signals transmitted from all neighboring cellular communication and PCS base stations from the prediction values estimated through the pseudo noise code offset values of the respective base stations by receiving the output signals of the first and second receiving processing means. And position measuring means for measuring a pseudo distance to predict a current position of the terminal using the measured delay time and the pseudo distance.

The present invention also provides a method for providing a location-related additional service using a mobile terminal for positioning using a mobile communication network, the method for providing a location-related additional service using the same, comprising: a first step of transmitting a location request signal from a terminal to a base station; A second step of transmitting, by the base station, location information and pseudonoise code offset information of neighboring base stations to a terminal requesting positioning; A third step of sequentially detecting pilot signals transmitted from the base station and measuring a delay time and a position of the base station; And a fourth step of predicting a current location of the terminal using the delay time information measured in the third step and location information of the base station.

In addition, the present invention is to be able to determine the user location by receiving only the pilot signal from the adjacent base stations, briefly look at the principle as follows.

First, when the PCS terminal requiring the positioning service transmits the positioning request signal through the nearest base station BS, the base station BS transmits the coordinate values of the neighboring base stations and the offset value of the pilot signal. Basically, since neighboring base stations are time-synchronized for several tens of ns through GPS, the terminal continuously measures pilot signals of neighboring base stations through a correlator to identify offset and delay values.

As such, since the transmission distance is measured through the estimated delay values, if only at least three or more pilot signals are detected, positioning can be sufficiently performed.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a configuration diagram of an embodiment of a complex terminal for positioning using a mobile communication network according to the present invention.

As shown in FIG. 1, the mobile terminal for positioning using a mobile communication network of the present invention includes a cellular band reception processor 110 for receiving and processing a pilot signal of a cellular frequency band used in a cellular mobile communication system, and a PCS ( Personal Communication Service) PCS band reception processing unit 120 for receiving and processing the pilot signal of the PCS band used in the communication system, and receives the output signals of the cellular band and PCS band reception processing unit (110, 120), the current of the terminal Position measuring unit 130 for predicting the position of the.

Referring to the operation of the composite terminal of the present invention having the structure as described above are as follows.

The cellular band reception processor 110 down-converts the pilot signal of the cellular frequency band received from the base station of the cellular mobile communication system to the baseband signal and transmits it to the position measurement unit 130.

At this time, the cellular band reception processing unit 110 amplifies the received pilot signal of the cellular frequency band to a sufficient signal to adjust the gain, and also removes the noise generated during the reception process through a filtering process, and then converts to a baseband signal. .

The PCS band reception processor 120 also converts the pilot signal of the PCS band received from the base station of the PCS communication system into a baseband signal and transmits the signal to the position measurement unit 130. Similarly, the PCS band reception processor 120 is also received. Amplified pilot signal of the cellular frequency band to a sufficient signal to adjust the gain, and also remove the noise generated during the reception process through the filtering process, and then converts to a baseband signal.

As such, when the signals converted into baseband signals are transferred to the position measuring unit 130, the position measuring unit 130 performs all cellular communication and PCS adjacent from the predicted values estimated through the pseudo noise code offset values of the respective base stations. The delay time and the pseudo distance of the pilot signal transmitted from the base stations are measured, and the current position of the terminal is predicted using the measured delay time and the pseudo distance.

2 is a flowchart illustrating a method for providing location related additional service using a composite terminal according to the present invention.

As shown in FIG. 2,

First, when the user terminal transmits a location related supplementary service request signal to a home base station (201), the neighboring base station determines the location information and pseudo noise of neighboring PCS and cellular base stations surrounding the base station from the database once established according to the supplementary service request. The code offset value is transmitted to the terminal (202).

Basically, it is assumed that the pseudonoise code offset value is sufficiently far from the propagation delay time between offset base stations by offset planning.

When such information is transmitted to the user terminal requesting the positioning, the user terminal detects pilot signals of all neighboring cellular and PCS base stations from the estimated value estimated through the pseudo noise code offset value of each base station and extracts a delay time (203). The position information is obtained by measuring a pseudo distance using a method of Time of Arrival (TOA) or Time Difference of Arrival (TDOA) (204).

Although the technical idea of the present invention has been described in detail according to the above preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention.

As described above, the present invention enables the simultaneous reception of signals of CDMA base stations using a composite terminal, thereby easily securing the visible distance and using only the delay time and signal strength of the pilot signal transmitted from the base stations. By measuring the location by itself, it is possible to remarkably improve the positioning accuracy and to easily provide the user's convenience and additional services.

Claims (2)

In the complex terminal for positioning using a mobile communication network, First receiving processing means for receiving a pilot signal of a first frequency band used in a cellular mobile communication system, amplifying and filtering the received pilot signal of the first frequency band to remove noise, and downconverting to a baseband signal ; Receiving a pilot signal of a second frequency band used in a Personal Communication Service (PCS) communication system, amplifying and filtering the received pilot signal of the second frequency band to remove noise, and downconverting to a baseband signal 2 receiving processing means; And A delay time of pilot signals transmitted from all neighboring cellular communication and PCS base stations from the predicted value estimated by the pseudo noise code offset values of the respective base stations by receiving the output signals of the first and second receiving processing means; Position measuring means for measuring the pseudo distance and predicting the current position of the terminal using the measured delay time and pseudo distance Positioning composite terminal using a mobile communication network comprising a. Method for providing location-related additional services using a mobile terminal for positioning using a mobile communication network A first step of transmitting a positioning request signal from a terminal to a base station; A second step of transmitting, by the base station, location information and pseudonoise code offset information of neighboring base stations to a terminal requesting positioning; A third step of sequentially detecting pilot signals transmitted from the base station and measuring a delay time and a position of the base station; And A fourth step of predicting a current location of the terminal using the delay time information measured in the third step and location information of the base station; Method for providing a location-related additional service using a positioning terminal using a mobile communication network comprising a location-related additional service providing method using the same.