KR20100055266A - Apparatus and method for position measurement - Google Patents

Apparatus and method for position measurement Download PDF

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Publication number
KR20100055266A
KR20100055266A KR1020080114256A KR20080114256A KR20100055266A KR 20100055266 A KR20100055266 A KR 20100055266A KR 1020080114256 A KR1020080114256 A KR 1020080114256A KR 20080114256 A KR20080114256 A KR 20080114256A KR 20100055266 A KR20100055266 A KR 20100055266A
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KR
South Korea
Prior art keywords
gps
gap filler
current position
mobile broadcast
gps satellites
Prior art date
Application number
KR1020080114256A
Other languages
Korean (ko)
Inventor
안정욱
Original Assignee
엘지이노텍 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020080114256A priority Critical patent/KR20100055266A/en
Publication of KR20100055266A publication Critical patent/KR20100055266A/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
    • G01S19/10—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing dedicated supplementary positioning signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Abstract

A position measuring apparatus and a position measuring method according to an embodiment of the present invention, the GPS receiver for receiving a GPS signal to calculate the current position; A mobile broadcast receiver configured to receive a mobile broadcast signal including a gap filler ID and extract the gap filler ID; A memory unit for storing location information according to the gap filler ID; The gap filler ID extracted by the mobile broadcast receiver is compared with the location information of the memory unit to check a current position, and select GPS satellites observable at the identified current position, and the GPS receiver detects the GPS satellites of the selected GPS satellites. It includes a control unit for controlling to calculate the current position by using the signal. According to the embodiment of the present invention, it is possible to shorten the positioning time and improve the accuracy of positioning.

Description

Position measuring device and position measuring method {APPARATUS AND METHOD FOR POSITION MEASUREMENT}

Embodiments of the present invention relate to a positioning device and a positioning method.

With the development of wireless communication technology, it is possible to provide various information through wireless communication network. In particular, location based services (LBS), which provide useful information at the current location according to the movement of the mobile terminal, are in the spotlight due to their wide utility and convenience.

The location-based service refers to a communication service that locates a mobile terminal such as a mobile phone, a personal digital assistant (PDA), a navigation device, and provides additional information related to the location. As additional information, local information, road guide information, a local weather, a store, and the like may be provided.

In order to use location-based services, it is essential to know the location of a mobile terminal. To this end, conventionally, a GPS (Global Positioning System) receiver is mounted on a mobile terminal to calculate a current position.

The GPS receiver calculates the current position by receiving the GPS signal transmitted from the GPS satellites. The GPS satellites orbit 24 tracks on 6 tracks and orbit the track every 12 hours. The GPS receiver receives GPS signals from at least three GPS satellites and calculates its position based on signal arrival time measurements.

However, since we do not know which of the GPS satellites can be observed at the current time and current location, the GPS receiver can calculate the current position only after selecting the observable GPS satellites by performing correlation calculation on 24 GPS signals. have. Therefore, when attempting to receive a GPS signal from a GPS satellite that cannot be observed or a satellite of precision (DOP), that is, an array position is poor, a time for calculating the current position is delayed.

Meanwhile, as the consumption of multimedia services increases, mobile terminals supporting mobile broadcast reception functions such as digital multimedia broadcasting (DMB) are widely used. DMB is a broadcasting service that digitally modulates various multimedia signals such as voice and video, and provides various multimedia broadcasting while the mobile terminal is equipped with a mobile broadcasting reception processing IC.

Embodiments of the present invention provide a position measuring apparatus and a position measuring method that can shorten the position measuring time and improve the accuracy of positioning.

Position measuring apparatus according to an embodiment of the present invention, the GPS receiver for receiving a GPS signal and calculating the current position; A mobile broadcast receiver configured to receive a mobile broadcast signal including a gap filler ID and extract the gap filler ID; A memory unit for storing location information according to the gap filler ID; The gap filler ID extracted by the mobile broadcasting receiver is compared with the location information of the memory unit to check a current position, and select GPS satellites observable at the identified current position, and the GPS receiver is configured to select the GPS satellites. It includes a control unit for controlling to calculate the current position by using the signal.

According to an embodiment of the present invention, there is provided a method for measuring a position, comprising: pre-stored a gap filler ID included in a mobile broadcast signal and location information according to the gap filler ID; Extracting the gap filler ID by receiving a mobile broadcast signal; Comparing the extracted gap filler ID with the previously stored gap filler ID and position information to identify a current position; Selecting GPS satellites observable at the identified current location; Computing a current position using the GPS signal of the observable GPS satellites.

According to the embodiment of the present invention, it is possible to shorten the position measurement time and improve the accuracy of positioning.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the position measuring device and the position measuring method according to an embodiment of the present invention. However, in describing the embodiments of the present invention, when it is determined that detailed descriptions of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, detailed descriptions thereof will be omitted.

1 is a configuration diagram of a positioning system using a positioning device according to an embodiment of the present invention.

As shown in Fig. 1, the position measuring system using the position measuring device according to the embodiment of the present invention includes a mobile broadcast satellite 5 for transmitting a mobile broadcast signal and a movement transmitted by the mobile broadcast satellite 5; A gap filler 10 for relaying broadcast signals, and a GPS satellite 1 for transmitting GPS signals. Accordingly, the mobile terminal 100 for position measurement selects the GPS satellite 1 that can be observed at the current position based on the mobile broadcast signal transmitted by the gap filler 10, and transmits the GPS transmitted by the selected GPS satellite 1. The current position can be measured using the signal.

The mobile broadcast satellite 5 receives the mobile broadcast signal transmitted from the terrestrial broadcasting station and transmits the mobile broadcast signal back to the ground.

The gap filler 10 is installed in an area where it is difficult to receive a mobile broadcast signal directly from the mobile broadcast satellite 5 due to the influence of the feature or the surrounding environment, and relays the mobile broadcast signal. The gap filler 10 receives the mobile broadcast signal from the mobile broadcast satellite 5, amplifies the received mobile broadcast signal, and transmits the received mobile broadcast signal to an area where it is difficult to reach the mobile broadcast signal.

The gap filler 10 is provided with identification information (hereinafter referred to as gap filler ID) for identifying each gap filler 10. Accordingly, the gap filler 10 attaches the gap filler ID to the mobile broadcast signal received from the mobile broadcast satellite 5 and transmits the mobile broadcast signal including the gap filler ID. Therefore, if the gap filler ID of the mobile broadcast signal is checked, the gap filler 10 that transmits the mobile broadcast signal can be identified.

When the gap filler 10 is identified, an approximate current position of the mobile terminal 100 that has received the mobile broadcast signal may be confirmed by inferring the service area of the gap filler 10 according to the installation position thereof.

The mobile terminal 100 includes a configuration for reception processing of a satellite mobile broadcast signal and a configuration for processing a GPS signal, and stores location information for each gap filler ID.

According to this configuration, the mobile terminal 100 can check the current position by receiving a mobile broadcast signal including a gap filler ID. The mobile terminal 100 calculates the orbit and idle period of the GPS satellite 1 based on the current position predicted through the gap filler ID to extract a list of the GPS satellites 1 that can be observed. The mobile terminal 100 calculates the DOP of the GPS satellite 1 predicted to be observable, selects the GPS satellite 1 having a good arrangement position, and receives the GPS signal by giving priority to the GPS satellite 1 having a good arrangement position. Try.

The DOP is a dimensionless number representing the error of the relative geometric position of the GPS satellites 1 in calculating the current position of the mobile terminal 1. Since GPS uses triangulation to calculate your current location, you must receive GPS signals from at least three GPS satellites. Therefore, as the distance between the GPS satellites 1 increases, the error of the calculation result of the current position decreases. DOP is a value that calculates the degree of error of such a calculation result, and the closer to 0, the higher the accuracy.

2 is a control block diagram of a position measuring apparatus according to an exemplary embodiment of the present invention, which illustrates a case in which a user input unit 150 for a user input and a display unit 140 displaying a broadcast image or various data are displayed. .

As shown in FIG. 2, the position measuring apparatus of the present invention includes a mobile broadcast receiver 110 for receiving a mobile broadcast signal, a GPS receiver 120 for receiving a GPS signal, and a position according to a gap filler ID. The current position is checked according to the memory unit 160 storing the information and the gap filler ID extracted from the mobile broadcast signal received by the mobile broadcast receiver 110, and the GPS satellite 1 that can be observed at the current position is calculated and then calculated. And a controller 130 for controlling the GPS receiver 120 to calculate a current position using the GPS signal of the GPS satellite 1.

The mobile broadcast receiver 110 receives and processes the mobile broadcast signal, including an RF circuit for receiving the mobile broadcast signal and a baseband circuit for signal processing. Accordingly, the mobile broadcast receiver 110 extracts a gap filler ID including the received mobile broadcast signal and provides the extracted gap filler ID to the controller 130. In addition, the mobile broadcast receiving unit 110 may convert the received mobile broadcast signal into a broadcast video signal and provide the same to the controller 130 so that the broadcast image is displayed on the display unit 140.

The GPS receiver 120 receives a GPS signal under the control of the controller 130 and calculates a current position. The GPS receiver 120 may receive a GPS signal from at least three GPS satellites 1 to calculate a position (coordinate) on the current plane, and may calculate up to an altitude when simultaneously received from four or more GPS satellites 1. This is possible. Here, the GPS receiver 120 may calculate a current position by receiving a GPS signal of the GPS satellite 1 selected by the controller 130.

The memory 160 stores a gap filler ID of the gap filler 10 that transmits a mobile broadcast signal, and location information corresponding to each gap filler ID. Since the service area of the gap filler 10 has a limit, it can be seen that the mobile terminal 100 is located in the service area of the gap filler 10 when a predetermined gap filler ID is received. Therefore, the memory 160 stores the gap filler ID and the location information on which the gap filler ID is received.

The controller 130 receives the gap filler ID included in the mobile broadcast signal from the mobile broadcast receiver 110. The controller 130 estimates a current position by searching for location information corresponding to the gap filler ID received from the information stored in the memory 160.

The controller 130 extracts a list of GPS satellites 1 that can be observed at the current position by calculating the orbits and revolution periods of the GPS satellites 1 based on the estimated current position. The controller 130 controls the GPS receiver 120 to receive a signal of the GPS satellite 1 determined to be observable to calculate an accurate current position.

Here, the controller 130 may calculate the DOP of the observable GPS satellite 1 and select the GPS satellite 1 having a small DOP, that is, a position calculation error is small. Accordingly, the controller 130 may control the GPS receiver 120 to preferentially receive a signal of the GPS satellite 1 having a small DOP.

According to this configuration, the position measuring apparatus according to the embodiment of the present invention, after estimating the current position through the gap filler ID included in the mobile broadcast signal, and selects the GPS satellite (1) observable at the estimated current position and The DOP of the observable GPS satellite 1 is calculated so that the GPS signal is received and processed in a small order. Accordingly, the time required for position measurement can be significantly shortened, and the accuracy of positioning can be improved, compared with the conventional technique of performing correlation calculation on 24 GPS signals to search the observation target GPS satellite 1.

3 is a control flowchart of a position measuring device according to an embodiment of the present invention.

In order to measure the current position, the position measuring device receives the mobile broadcast signal through the mobile broadcast receiver 110 (S10).

The mobile broadcast receiver 110 extracts a gap filler ID from the received mobile broadcast signal and provides the gap filler ID to the controller 130.

The controller 130 estimates an approximate current position by comparing the extracted gap filler ID with information stored in the memory unit 160 (S14).

The controller 130 calculates the trajectory and idle period of each GPS satellite 1 based on the estimated current position, and generates a list of the GPS satellites 1 that can be observed at the current position (S16). Here, the controller 130 may temporarily store the list of observable GPS satellites 1 in the memory unit 160.

The controller 130 calculates the DOPs of the observable GPS satellites 1 and controls the GPS receiver 120 to try to receive the GPS signals in the order of the smallest DOPs (S18). Thus, the controller 130 may reduce the current position calculation error by providing the GPS receiver 120 with a list of the GPS satellites 1 arranged in a small DOP order.

The GPS receiver 120 attempts to receive a GPS signal according to the list of the GPS satellites 1 provided by the controller 130 and checks whether the reception is successful (S20). Since the GPS receiver 120 needs to receive three or more GPS signals in order to calculate the current position, the GPS receiver 120 sequentially receives the GPS signals according to the list of the GPS satellites 1 provided by the controller 130. Try.

If the GPS signal is successfully received, the GPS receiver 120 calculates a current position using the received GPS signal (S22). On the other hand, if the GPS signal reception fails, attempts to receive the GPS signal of the next rank.

Although described above with reference to the embodiment is only an example and is not intended to limit the invention, those of ordinary skill in the art to which the present invention does not exemplify the above within the scope not departing from the essential characteristics of this embodiment It will be appreciated that many variations and applications are possible. For example, each component specifically shown in the embodiment can be modified. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

1 is a block diagram of a positioning system to which the position measuring device according to an embodiment of the present invention is applied.

2 is a control block diagram of a position measuring device according to an embodiment of the present invention.

3 is a control flowchart of a position measuring device according to an embodiment of the present invention.

Claims (11)

A GPS receiver for receiving a GPS signal and calculating a current position; A mobile broadcast receiver configured to receive a mobile broadcast signal including a gap filler ID and extract the gap filler ID; A memory unit for storing location information according to the gap filler ID; The gap filler ID extracted by the mobile broadcast receiver is compared with the location information of the memory unit to check a current position, and select GPS satellites observable at the identified current position, and the GPS receiver detects the GPS satellites of the selected GPS satellites. Position measuring device comprising a control unit for controlling to calculate the current position by using a signal. The method of claim 1, The control unit, Calculating a dilution of precision (DOP) of the observable GPS satellites, and controlling the GPS receiver to receive the GPS signals in a small order. The method of claim 2, The control unit, Positioning device for generating the list of the GPS satellites in order of the DOP is small and provide it to the GPS receiver. The method of claim 1, The control unit, Positioning device for selecting the GPS satellites observable at the current position identified by the gap filler ID by calculating the revolving period and orbit of the GPS satellites. The method of claim 1, The mobile broadcast receiver, Position measuring apparatus for generating a mobile broadcast video signal by processing the mobile broadcast signal including the gap filler ID. The method of claim 5, And a display unit for displaying the broadcast video signal. Storing the gap filler ID included in the mobile broadcast signal and location information according to the gap filler ID in advance; Extracting the gap filler ID by receiving a mobile broadcast signal; Comparing the extracted gap filler ID with the previously stored gap filler ID and position information to identify a current position; Selecting GPS satellites observable at the identified current location; And calculating a current position by using the GPS signal of the observable GPS satellite. The method of claim 7, wherein Calculating a current position using the GPS signal of the observable GPS satellites, Calculating a dilution of precision (DOP) of the observable GPS satellites; Calculating the current position such that the DOP receives the GPS signals in a small order. The method of claim 8, And generating the list of the GPS satellites in descending order of the DOP. The method of claim 7, wherein Selecting the GPS satellites observable at the identified current position, Calculating an orbital period and an orbit of the GPS satellites; And selecting a GPS satellite observable at the current position identified through the gap filler ID according to an idle period and an orbit of the GPS satellites. The method of claim 7, wherein And displaying a mobile broadcast video signal by processing the mobile broadcast signal including the gap filler ID.
KR1020080114256A 2008-11-17 2008-11-17 Apparatus and method for position measurement KR20100055266A (en)

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Application Number Priority Date Filing Date Title
KR1020080114256A KR20100055266A (en) 2008-11-17 2008-11-17 Apparatus and method for position measurement

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Application Number Priority Date Filing Date Title
KR1020080114256A KR20100055266A (en) 2008-11-17 2008-11-17 Apparatus and method for position measurement

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KR20100055266A true KR20100055266A (en) 2010-05-26

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