KR101085581B1 - Data Terminal and Position Measurement Method for the Same - Google Patents

Abstract

An information terminal capable of measuring location information by an Assisted Global Positioning System (A-GPS) method according to Extended Ephemeris (DMB) transmitted from a Digital Multimedia Broadcasting (DMB) broadcasting station server, and a location measuring method therefor do.

An information terminal of the present invention includes a DMB receiving apparatus for receiving a DMB broadcast signal; A GPS receiver for receiving a GPS satellite signal; And a controller configured to extract and store extended satellite orbit information at least once from the DMB broadcast signal received by the DMB receiver, and to transmit the stored extended satellite orbit information to the GPS receiver when power is applied to the information terminal. Includes, the GPS receiver measures the position of the information terminal by the A-GPS method using the pseudo-range information measured from the GPS satellite signal and the extended satellite orbital information received from the controller.

According to the present invention, the positioning can be performed in the A-GPS method without installing any additional hardware or paying a communication fee.

DMB, A-GPS, Extended Satellite Orbit Information, Navigation

Description

Data terminal and position measurement method for the same {Data Terminal and Position Measurement Method for the Same}

The present invention relates to an information terminal. More specifically, the position information is measured by an Assisted Global Positioning System (A-GPS) method according to extended satellite orbit information (Extended Ephemeris) transmitted from a digital multimedia broadcasting (DMB) broadcasting station server. The present invention relates to an information terminal capable of performing the same and a location measuring method for the same.

The A-GPS method, which is one of the location measuring methods, is a technology in which a terminal equipped with a GPS receiver measures location of a terminal by mixing location information received from a satellite and auxiliary information received from a base station of a mobile communication system. When using the A-GPS method, it is possible to shorten the positioning time and to identify a more accurate position compared to the case of using only the GPS receiver alone.

On the other hand, the navigation terminal for guiding the driving route of the vehicle is gradually increasing its penetration rate, the navigation terminal is generally equipped with a GPS receiver. A typical GPS receiver calculates its current position by receiving orbital information (Ephemeris) and pseudo range (PR) information from four or more (three under certain circumstances) satellites. Here, the pseudo distance PR refers to the distance between the terminal and the satellite measured from the difference between the time when the satellite transmits a signal and the time when the terminal receives the signal. In addition, satellite orbit information (Ephemeris) refers to information about the position on the orbit of the GPS satellite is updated every two to four hours period.

Although pseudorange information and satellite orbit information are similar in terms of information obtained from a GPS satellite signal, there is a big difference in the time required for reception. That is, the reception of pseudorange information is completed within a few seconds, but the reception of satellite orbit information takes at least 30 seconds, and may take several minutes or more in case of a failure such as the satellite being blocked by a building. That is, when the satellite's orbit information is checked when the current position needs to be calculated, if the satellite orbit information needs to be updated, it takes at least 30 seconds to acquire the orbit information from the satellite. The inconvenience of taking a few minutes in the calculation for at least 30 seconds.

When the A-GPS method is used, satellite orbit information is received from the base station of the mobile communication system, or extended satellite orbit information is received from the base station of the mobile communication system. Therefore, satellite orbit information acquisition can usually be completed within 10 seconds. There is an advantage that the time required for position calculation is significantly shortened. Here, the extended satellite orbit information (Extended Ephemeris) is a prediction of satellite orbit information for the next several days, which is not included in the GPS satellite signal and is calculated by a separate prediction server. Orbital information can be extracted more easily. Extended satellite orbit information may be referred to as a long term term (Global Locate, Inc.), AlmanacPlus (ublox), Extended Ephemeris (SiRF, Inc.), etc., depending on the manufacturer of the GPS receiver. As such, when the navigation terminal measures the position using the A-GPS method, it is expected that the initial position calculation time can be shortened.

However, in order to use the A-GPS system, hardware such as a modem for communicating with a base station of a mobile communication system must be additionally installed in a navigation terminal, and a communication fee is incurred because it must be frequently connected to a mobile communication system. There are disadvantages.

In recent years, the penetration rate of portable information terminals such as cellular phones, personal communication service (PCS) phones, personal digital assistants (PDAs), portable multimedia players (PMPs), etc. is increasing day by day, and location-based services using such portable information terminals are increasing. It is also actively provided.

However, the portable information terminal also needs to be connected to the base station of the mobile communication system in order to measure the location using the A-GPS method. As a result, a communication fee is generated, thereby increasing the burden on the customer and decreasing the utilization rate of the location-based service. .

The present invention has been made to solve the above problems and disadvantages, an information terminal capable of measuring the position by the A-GPS method using the extended satellite orbit information transmitted from the digital multimedia broadcasting station server and a method for measuring the position There is a technical challenge in providing it.

Another technical problem of the present invention is to make it possible to measure the position of a terminal at high speed using an A-GPS method without adding additional hardware to an information terminal having a DMB receiving module.

According to a first aspect of the present invention, there is provided an information terminal including: a DMB receiving apparatus for receiving a digital multimedia broadcasting (DMB) broadcast signal; A GPS receiver for receiving a GPS (Global Positioning System) satellite signal; And a controller configured to extract and store extended satellite orbit information at least once from the DMB broadcast signal received by the DMB receiver, and to transmit the stored extended satellite orbit information to the GPS receiver when power is applied to the information terminal. And the GPS receiver measures the position of the information terminal by A-GPS (Assisted GPS) method using pseudo range information measured from the GPS satellite signal and extended satellite orbit information received from the controller. Send to the controller.

In addition, the information terminal according to the second embodiment of the present invention includes a DMB receiving apparatus for receiving a DMB broadcast signal; A GPS receiver for receiving a GPS (Global Positioning System) satellite signal; And a controller configured to extract extended satellite orbit information at least once from the DMB broadcast signal received by the DMB receiving apparatus and transmit the extracted information to the GPS receiving apparatus when power is applied to the information terminal. Storing the extended satellite trajectory information received from the controller, and measuring the position of the information terminal by A-GPS (Assisted GPS) method using the pseudo range information and the stored extended satellite trajectory information measured from the GPS satellite signal. Send to the controller.

In addition, the information terminal according to the third embodiment of the present invention includes a GPS receiver for receiving a GPS (Global Positioning System) satellite signal; A DMB receiver configured to receive a digital multimedia broadcasting (DMB) broadcast signal and extract extended satellite orbit information from the broadcast signal at least once when power is applied; And a controller configured to receive and store the extended satellite orbit information from the DMB receiver and to transmit the stored extended satellite orbit information to the GPS receiver, wherein the GPS receiver is a pseudo signal measured from the GPS satellite signal. The location of the information terminal is measured and transmitted to the controller by A-GPS (Assisted GPS) using distance information and extended satellite orbit information received from the controller.

In addition, the information terminal according to the fourth embodiment of the present invention includes a GPS receiver for receiving a GPS (Global Positioning System) satellite signal; A DMB receiver configured to receive a digital multimedia broadcasting (DMB) broadcast signal and extract extended satellite orbit information from the broadcast signal at least once when power is applied; And a controller for controlling the GPS receiver and the DMB receiver, wherein the GPS receiver stores extended satellite trajectory information received from the controller, pseudorange information measured from the GPS satellite signal, and the stored information. The location of the information terminal is measured and transmitted to the controller by A-GPS (Assisted GPS) using the extended satellite orbit information.

A GPS (Global Positioning System) receiver and a DMB (Digital Multimedia Broadcasting) receiver are each connected internally or externally, and a position measuring method in an information terminal having a control unit and a memory, wherein power is supplied to the information terminal. A first step of the GPS receiver measuring a pseudo distance from a GPS satellite; A second step in which the DMB receiving apparatus tunes to a DMB broadcasting system and receives a DMB broadcasting signal when power is supplied to the information terminal; A third step of the information terminal extracting extended satellite orbit information from the DMB broadcast signal and storing the extended satellite orbit information in the memory; A fourth step of detecting, by the information terminal, time information; A fifth step of extracting, by the information terminal, location information of the information terminal; And a sixth step of the GPS receiver measuring the position of the information terminal by using the pseudorange and the extended satellite orbit information, the time information, and the location information stored in the memory.

According to the present invention, the information terminal is not connected to the base station of the mobile communication system, and by using the extended satellite orbit information included in the broadcast signal transmitted from the DMB station server, no additional hardware is installed or the communication fee is paid. Positioning can be performed without A-GPS.

Accordingly, it is possible to improve the position measurement performance in the information terminal, to be produced at a low price, as well as to reduce the usage fee to improve the user's satisfaction.

The present invention can be applied to an information terminal such as a navigation terminal, a cellular phone, a PCS phone, a PDA, a PMP, etc. having a DMB (Digital Multimedia Broadcasting) receiving module. Hereinafter, the present invention will be described with reference to the accompanying drawings. A preferred embodiment of the present invention will be described in more detail.

1 is a block diagram of a navigation system applied to the present invention.

As shown, the navigation terminal 10 includes a control unit 110, a GPS receiver 120, a DMB receiver 130, and a memory 140 to receive GPS satellite signals from the GPS satellites 20. Meanwhile, the broadcast signal including the extended satellite orbit information transmitted from the DMB broadcasting station server 30 is received through the DMB base station 40. In the present exemplary embodiment, the case where the navigation terminal 10 includes the GPS receiver 120 and the DMB receiver 130 is described. However, the GPS receiver 120 and the DMB receiver 130 are mounted externally. Of course it is also possible.

Meanwhile, the DMB broadcasting server 30 may be a satellite DMB broadcasting server or a terrestrial DMB broadcasting server. The DMB broadcasting station server 30 may acquire an extended satellite orbit information by installing a separate GPS receiver or receiving satellite orbit information from a GPS receiver installed at a long distance. That is, the DMB broadcasting station server 30 may predict the moving distance of the satellite to a certain point in the future by using the information such as the satellite orbit information of the past and the moving speed of the satellite, and navigate the prediction as extended satellite orbit information. It may be provided to the terminal 10. Since the process of obtaining the extended satellite orbit information by the DMB broadcasting station server 30 is outside the scope of the present invention, a detailed description thereof will be omitted.

When the extended satellite orbit information is transmitted, the navigation terminal 10 may perform location measurement in the A-GPS method.

The navigation terminal 10 drives the GPS receiver 120 and the DMB receiver 130 when the power is applied, so that the PR information received from the GPS receiver 120 and the extended satellite trajectory received by the DMB receiver 130 are provided. Perform location measurements using the information.

Here, the signal transmitted from the DMB base station 40 may further include time information and location information from which the DMB broadcasting station server 30 transmits extended satellite orbit information. At this time, the location information is approximate latitude / longitude information of the DMB broadcasting station server 30 or the DMB base station 40.

2 is a block diagram of a navigation terminal according to a first embodiment of the present invention.

As shown, the navigation terminal 10-1 according to an embodiment of the present invention includes a control unit 110-1, a GPS receiver 120-1, a DMB receiver 130-1, and a memory 140. It includes, the GPS receiver 120-1 and the DMB receiver 130-1 may be mounted as an internal or external.

The detailed structure of each component part is as follows.

First, the controller 110-1 includes a GPS receiver control module 1101, a DMB receiver control module 1102, an extended satellite orbit information extraction module 1103, a time information extraction module 1104, and a location information extraction module ( 1105).

The GPS receiver control module 1101 and the DMB receiver control module 1102 control the operations of the GPS receiver 120-1 and the DMB receiver 130-1, respectively.

The extended satellite orbit information extraction module 1103 extracts the extended satellite orbit information from the DMB broadcast signal received by the DMB receiver 130-1 once or every predetermined period after power is applied, and stores the extended satellite orbit information in the memory 140. This is transmitted to the GPS receiver 120-1. The time information extraction module 1104 detects a transmission time of the extended satellite orbit information and provides the GPS receiver 120-1 to the GPS receiver 120-1. Here, the time information may be detected using time information included in the broadcast signal transmitted from the DMB base station 40 to the DMB receiving apparatus 130-1.

In addition, the location information extraction module 1105 extracts location information from the DMB broadcast signal received by the DMB receiver 130-1 once or every predetermined period after power is supplied to the GPS receiver 120-1. do. Here, the location information is the location of the broadcasting station server 30 or the DMB base station 40, or optionally any fixed location, or the location information measured most recently by the GPS receiver 120-1 and the The optimal position is selected from the position information extracted by the position information extraction module 1105.

Next, the GPS receiver 120-1 includes a GPS RF unit 1201, a GPS baseband processor 1202, and a GPS signal processor, and the GPS signal processor includes a PR measurement module 1203 and a position calculation module 1204. It includes.

The GPS RF unit 1201 receives a signal transmitted from the GPS satellite 20 and converts the signal to a baseband frequency, and the GPS baseband processor 1202 processes the signal converted to the baseband frequency to perform data necessary for PR measurement. Create

The PR measurement module 1203 measures the PR between the GPS satellite 20 and the navigation terminal 10-1 by using the data generated by the GPS baseband processor 1202.

In addition, the position calculation module 1204 may transmit the extended satellite orbit information received from the extended satellite orbit information extracting module 1103 of the controller 110-1 and the navigation terminal 10-1 received from the position information extracting module 1105. The current position of the navigation terminal 10-1 by using the approximate position information of the time information, the time information received from the time information extraction module 1104, and the PR measured by the PR measurement module 1203, and measuring the measurement result by the controller ( 110-1).

At this time, when the extended satellite orbit information is transmitted to the position calculating module 1204 at predetermined intervals, the position calculating module 1204 may use the most recent extended satellite orbit information to determine the location of the navigation terminal 10-1. Measure your current location. In addition, even when the location information is transmitted at predetermined intervals, the location calculation module 1204 measures the current location of the navigation terminal 10-1 using the most recent location information.

Meanwhile, the DMB receiver 130-1 includes a DMB RF unit 1301, a DMB baseband processor 1303, and a DMB signal processor, and the DMB signal processor includes a video play module 1303 and an audio play module 1304. And a data reproducing module 1305.

The DMB RF unit 1301 receives a DMB broadcast signal from the DMB base station 40 and converts the signal into a baseband frequency, and the DMB baseband processor 1302 processes the signal included in the frequency-converted signal to the DMB signal processor. To pass.

In addition, the video reproducing module 1303 and the audio reproducing module 1304 of the DMB signal processing unit decode the DMB broadcast signal and output the video and audio signals through an output device, and the data reproducing module 1305 decodes the DMB broadcast signal. To provide the data signal to the controller 110-1.

Although not shown, the navigation terminal 10-1 further includes a navigation device to measure the current location in the location calculation module 1204 as power is applied, and as destination information is set by the user, the memory 140. Route information is generated using the road information stored in) and provided to the user.

3 is a block diagram of a navigation terminal according to a second embodiment of the present invention.

Unlike the navigation terminal 10-1 illustrated in FIG. 2, the navigation terminal 10-2 according to the present embodiment has a GPS receiver 120 in addition to the first memory 140 connected to the controller 110-2. -2) further includes a second memory 1215 therein.

In the navigation terminal 10-2, the DMB receiver 130-2 is tuned to the DMB base station 40 to receive a broadcast signal, and the extended satellite orbit information extraction module 1113 of the controller 110-2 is provided. The time information extracting module 1114 extracts the extended satellite orbit information and the time information included in the broadcast signal once or after each preset period after the power is applied, respectively. The location information extraction module 1115 extracts the location information or the fixed location information included in the broadcast signal one time or every predetermined period after power is applied to the location calculation module 1214.

Meanwhile, the position calculation module 1214 stores the extended satellite orbit information provided by the extended satellite orbit information extraction module 1113 in the second memory 1215, and time information and position received from the time information extraction module 1114. The current location of the navigation terminal 10-2 is measured by using the location information received from the information extraction module 1115 and the PR measured by the PR measurement module 1213, and the measurement result is transmitted to the controller 110-2. .

4 is a configuration diagram of a navigation terminal according to a third embodiment of the present invention.

In the navigation terminal 10-3 according to the present embodiment, the extended satellite orbit information extraction module 1103 and the time information extraction module included in the control unit 110-2 of the navigation terminal 10-1 shown in FIG. 1104 and the location information extraction module 1105 are provided in the DMB receiving apparatus 130-3, and accordingly, the controller 110-3 controls the GPS receiving apparatus control module 1121 and the DMB receiving apparatus control module 1122. ).

The DMB signal processing unit of the DMB receiver 130-3 is a video reproducing module 1323, an audio reproducing module 1324, a data reproducing module 1325, an extended satellite orbit information extracting module 1326, and a time information extracting module. 1335 and the location information extraction module 1328.

In the present embodiment, the extended satellite orbit information extraction module 1326 extracts the extended satellite orbit information included in the broadcast signal received from the DMB base station 40 once or every predetermined period after power is applied to the controller 110-. 3), the time information extraction module 1327 detects the transmission time of the extended satellite orbit information included in the broadcast signal and transmits it to the controller 110-3. The location information extraction module 1328 extracts the location information included in the broadcast signal once or every predetermined period after power is applied and transmits the location information to the controller 110-3.

Accordingly, the controller 110-3 stores the extended satellite orbit information transmitted from the extended satellite orbit information extraction module 1326 in the memory 140, and transmits the extended satellite orbit information to the GPS receiver 120-3. In addition, the controller 110-3 transmits time information transmitted from the time information extraction module 1327 and location information transmitted from the location information extraction module 1328 to the GPS receiver 120-3.

On the other hand, the position calculation module 1224 of the GPS receiver 120-3 is extended satellite orbit information, time information and position information received through the control unit 110-3, and the PR measured by the PR measurement module 1223 The position of the navigation terminal 10-3 is measured using the, and the result of the position measurement is transmitted to the controller 110-3.

In the present embodiment, the DMB receiver 130-3 includes an extended satellite orbit information extraction module 1326, a time information extraction module 1327, and a location information extraction module 1328, but the DMB receiver ( The extended satellite orbit information extraction module 1326 may be configured in the 130-3, and the time information extraction module 1327 and / or the location information extraction module 1328 may be configured in the controller 110-3.

5 is a configuration diagram of a navigation terminal according to a fourth embodiment of the present invention.

Unlike the navigation terminal 10-3 illustrated in FIG. 4, the navigation terminal 10-4 according to the present embodiment has a GPS receiver 120 in addition to the first memory 140 connected to the controller 110-4. -4) further includes a second memory 1235 therein.

In the present embodiment, the extended satellite orbit information extraction module 1336 extracts the extended satellite orbit information included in the broadcast signal received from the DMB base station 40 once or every predetermined period after power is applied. 4), the time information extraction module 1357 detects the transmission time of the extended satellite orbit information included in the broadcast signal and transmits it to the controller 110-4. The location information extraction module 1338 extracts the location information included in the broadcast signal once or every predetermined period after power is applied and transmits the location information to the controller 110-4.

Accordingly, the controller 110-4 provides the extended satellite orbit information, time information, and position information transmitted from the DMB receiver 130-4 to the position calculation module 1234 of the GPS receiver 120-4. .

On the other hand, the position calculation module 1234 of the GPS receiver 120-2 stores the extended satellite orbit information provided through the control unit 110-4 in the second memory 1235, and when the position calculation is required Extended satellite orbit information stored in the second memory 1235 and time information received from the time information extraction module 1335, location information received from the location information extraction module 1338 and PR measured by the PR measurement module 1233 The current position of the navigation terminal 10-4 is measured, and the measurement result is transmitted to the controller 110-4.

The navigation terminal 10 according to the first to fourth embodiments described above uses the extended satellite orbit information transmitted in the data channel from the DMB base station 40 to measure the position of the navigation terminal 10. 40 may transmit extended satellite orbit information, in particular using a Transport Protocol Expert Group (TPEG) message.

Recently, a technology for providing a traffic and travel information (TTI) service using a DMB broadcast signal has been commercialized, and this information is transmitted through a TPEG (Transport Protocol Expert Group) protocol.

The TPEG standard is a standardized state of Road Traffic Message (RTM), Public Transport Information (PTI), and so on. You can find out the speed of communication in advance, and you can be informed in advance of dangerous section information such as road construction and accident news.

According to the present invention, extended satellite orbit information is transmitted from a DMB system including a DMB broadcasting station server and a DMB base station to an information terminal such as a navigation terminal by using a safety-driving-information (SDI) message included in the TPEG message. In this case, the position measurement may be performed by the information terminal using the A-GPS method.

TPEG messages have the same container structure, and one of these TPEG messages is an SDI message.

6 is a diagram for explaining an SDI message applied to the present invention.

The TPEG message related to the TPEG application service is transmitted to the DMB receiver 130 in the form as shown in FIG. 6. SDI messages include message management containers, SDI event containers, and TTI location containers. Message management containers include the following:

Message identifier; Identifier for the message associated with each event

-Version information; Sequential number to identify successive messages with the same message

Message generation time; The date and time stamp records the date and time that the message was actually created, and is used to manage the message.

Start time; The time at which an event enters a state, which may indicate the date when the event has already entered or is scheduled for future entry.

An end time; The time when an event leaves a state, which can indicate when it is already out of date or scheduled to leave in the future

Message valid time; When the message is no longer valid, that is, when the message is deleted

Meanwhile, the SDI event container includes a point safe operation item, a section safe operation item, a roadside service facility component (RSF), and a validity item.

Here, the point safe driving section describes information on safe driving such as frequent accidents and dangerous points on the road, and the section safe driving section describes information related to safe driving such as frequent sections and dangerous sections on the road. The RSF is a part that describes information on the transportation convenience facilities necessary for safe driving on the road, and the validity item means information on the total number of messages constituting the SDI message.

The TTI location container then contains location information according to terrestrial or satellite DMB traffic and travel information service matching standards.

According to the present invention, the extended satellite orbit information is extracted from the SDI message by transmitting the extended satellite orbit information in the reserved area allocated to the manufacturer of the navigation terminal 10 among the event containers of the SDI message. In addition, the position measurement is performed in the A-GPS method together with the PR measured by the GPS receiver 120. In this case, the extended satellite orbit information transmitted through the SDI message may further include extended satellite orbit information transmission time and position information of the DMB broadcasting station server 30, and the location information may include the DMB broadcasting station server 30 or the DMB base station ( Approximate latitude / longitude information in 40).

Although the present embodiment has shown a method of including extended satellite orbit information in an SDI message, it is also possible to include the information in a road traffic message (RTM). In addition, the extended satellite orbit information may be implemented using various types of messages such as Congestion & Travel Time Information (CTT), CTT-SUM (short traffic information), NWS (news information), and satellite orbit. Any information, including an estimate of, should be understood to fall within the scope of the extended satellite orbital information of the present invention.

7 is a flowchart illustrating a position measuring method according to an embodiment of the present invention.

First, as power is applied to the navigation terminal 10 (S101), the GPS receiver 120 is driven to measure PR (S103), while the DMB receiver 130 is driven to the DMB base station 40. Tuning is performed (S105).

Accordingly, the DMB receiver 130 receives extended satellite orbit information, extended satellite orbit information and time information, or extended satellite orbit information and location information, or extended satellite orbit information, time information and position information from the DMB base station 40. Receives a broadcast signal containing (S107).

Thereafter, the time information extraction module (1104 of FIG. 2, 1114 of FIG. 3, 1327 of FIG. 4, and 1337 of FIG. 5) included in the controller 110 or the DMB receiver 130 transmits extended satellite orbit information. It is extracted (S109). At this time, when the controller 110 extracts time information, the time information may be detected from the DMB broadcast signal.

In addition, the extended satellite orbit information extraction module (1103 of FIG. 2, 1113 of FIG. 3, 1326 of FIG. 4, and 1336 of FIG. 5) included in the controller 110 or the DMB receiver 130 may use an extended satellite from a DMB broadcast signal. The trajectory information is extracted (S111) and stored in the memory 140.

Next, the location information extraction module (1105 of FIG. 2, 1115 of FIG. 3, 1328 of FIG. 4, and 1338 of FIG. 5) included in the controller 110 or the DMB receiver 130 may include location information included in the DMB broadcast signal. It is extracted (S113).

In this case, when the location information is extracted by the control unit 110, the location information may be used without using the fixed location information without extracting from the DMB broadcast signal.

In this way, after the extended satellite orbit information, the time information and the position information is detected, the position calculation module of the GPS receiver performs the PR information measured in step S103 and the extended satellite orbit information, time information extracted in steps S109 to S113, and The location of the navigation terminal 10 is measured using the location information (S115).

In addition, since the navigation terminal 10 typically includes a display device such as an LCD, the navigation terminal 10 extracts the number of extended satellite orbit information available for position calculation from the extended satellite orbit information stored in the memory 140 to display on the display device. If (S117), there is also an advantage that the user can roughly predict when the position calculation is complete. For example, if the number of extended satellite orbit information available for the position calculation is more than the specified number (for example, four), the user can predict that the position calculation will be completed within a few seconds. The user can predict that they must wait until they are complete or receive satellite orbit information directly from the GPS satellites.

In addition, whether the extended satellite orbit information available for calculating the position from the extended satellite orbit information stored in the memory 140 is more than a sufficient number (usually four or more) to measure the position of the information terminal by the A-GPS method. May be expressed as a character or a picture specific to the display device (S119). The user may predict when the position calculation is completed as the specific text or picture is displayed.

As described above, the operation of extracting extended satellite orbit information (S111) may be performed at predetermined intervals after power is applied. In addition, the operation of extracting location information (S113) may also be performed at predetermined intervals after power is applied. In this case, in step S115, the position of the navigation terminal 10 is calculated using the most recently extracted extended trajectory information and location information among the periodically extracted information.

In general, the extended satellite orbit information includes predictions of satellite orbits for a week. Therefore, in some cases, step S111 may be omitted, in which case the pre-stored extended satellite orbit information will be used for the position calculation. Thus, by measuring the location using the pre-stored extended satellite orbit information, it is possible to save time to receive and extract the extended satellite orbit information, there is an advantage that it is possible to advance the time when the position calculation is completed.

In the above description, the controller 110, the GPS receiver 120, and the DMB receiver 130 may be applied to a portable information terminal such as a cellular phone, a PCS phone, a PDA, a PMP, and the like.

Even in this case, the portable information terminal may be equipped with a GPS receiver and a DMB receiver, either internally or externally, and are included in the broadcast signal received by the DMB receiver without having to connect to a base station of the mobile communication system when measuring a position. By using the extended satellite orbit information, positioning can be performed accurately at high speed. In addition, various location-based services may be used using the measured location information.

As such, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical concept or essential characteristics. Therefore, the above-described embodiments are to be understood as illustrative in all respects and not as restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

1 is a configuration diagram of a navigation system to which the present invention is applied;

2 is a block diagram of a navigation terminal according to a first embodiment of the present invention;

3 is a block diagram of a navigation terminal according to a second embodiment of the present invention;

4 is a configuration diagram of a navigation terminal according to a third embodiment of the present invention;

5 is a configuration diagram of a navigation terminal according to a fourth embodiment of the present invention;

6 is a view for explaining an SDI message applied to the present invention;

7 is a flowchart illustrating a position measuring method according to an embodiment of the present invention.

Description of the Related Art [0002]

10: information terminal 20: GPS satellite

30: DMB broadcasting station server 40: DMB base station

110: control unit 120: GPS receiver

130: DMB receiver 140: memory

Claims (43)

A DMB receiving apparatus for receiving a DMB broadcast signal; A GPS receiver for receiving a GPS (Global Positioning System) satellite signal; And As power is applied to the information terminal, the extended satellite orbit information defined by the satellite orbit information prediction value for the future specific period is extracted and stored at least once from the DMB broadcast signal received by the DMB receiver, and the stored extended satellite And a controller for transmitting track information to the GPS receiver. The GPS receiver measures the position of the information terminal by A-GPS (Assisted GPS) using the pseudorange information measured from the GPS satellite signal and the extended satellite orbital information received from the controller, and then measures the position of the information terminal to the controller. Information terminal, characterized in that for transmitting. The method of claim 1, The controller may provide time information of transmitting the extended satellite orbit information together with the extended satellite orbit information, the location information of the information terminal, or the time information and the location information to the GPS receiver. Information terminal. The method according to claim 1 or 2, The control unit includes a time information extraction module for detecting a transmission time of the extended satellite orbit information; And A location information extraction module for extracting location information of the information terminal; Information terminal comprising a. The method of claim 3, wherein And the positional information is positional information fixed to an arbitrary position. The method of claim 3, wherein And the location information is latitude / longitude information of a DMB broadcasting station server or a DMB base station detected from a broadcast signal received by the DMB receiving apparatus. The method of claim 1, The GPS receiver, or the DMB receiver, or the GPS receiver and the DMB receiver are built in or external to the information terminal. The method of claim 1, And the information terminal is a navigation terminal. A DMB receiving apparatus for receiving a DMB broadcast signal; A GPS receiver for receiving a GPS (Global Positioning System) satellite signal; And As power is supplied to the information terminal, extended satellite orbit information, which is defined as satellite orbit information prediction values for a specific period of time, is extracted from the DMB broadcast signal received by the DMB receiver and transmitted to the GPS receiver at least once. A control unit; The GPS receiver stores the extended satellite trajectory information received from the controller, and uses the pseudo-range information measured from the GPS satellite signal and the stored extended satellite trajectory information by using the assisted GPS (A-GPS) method. An information terminal, characterized in that for measuring the position of the terminal and transmitting to the control unit. The method of claim 8, The GPS receiver includes a PR measurement module for measuring pseudo range information from information received from the GPS satellites; A position calculation module for measuring a position of the information terminal using the pseudorange information and the stored extended satellite orbit information; And A memory for storing the pseudorange information and the extended satellite orbit information; Information terminal comprising a. The method of claim 8, The controller may provide time information of transmitting the extended satellite orbit information together with the extended satellite orbit information, the location information of the information terminal, or the time information and the location information to the GPS receiver. Information terminal. The method of claim 8, The control unit may include a time information extraction module configured to detect a transmission time of the extended satellite orbit information; And A location information extraction module for extracting location information of the information terminal; Information terminal comprising a. The method of claim 11, And the positional information is positional information fixed to an arbitrary position. The method of claim 11, And the location information is latitude / longitude information of a DMB broadcasting station server or a DMB base station detected from a broadcast signal received by the DMB receiving apparatus. The method of claim 8, And the GPS receiver, the DMB receiver, or the GPS receiver and the DMB receiver are embedded or external to the information terminal. The method of claim 8, And the information terminal is a navigation terminal. A GPS receiver for receiving a GPS (Global Positioning System) satellite signal; A DMB receiver configured to receive a digital multimedia broadcasting (DMB) broadcast signal as power is applied and to extract extended satellite trajectory information defined by satellite orbit information prediction values for a specific future period from the broadcast signal; And And a controller configured to receive and store the extended satellite orbit information from the DMB receiver and to transmit the stored extended satellite orbit information to the GPS receiver. The GPS receiver measures the position of the information terminal by A-GPS (Assisted GPS) method using pseudo range information measured from a GPS satellite signal and the extended satellite orbit information received from the controller, and transmits the location of the information terminal to the controller. Information terminal, characterized in that. The method of claim 16, The DMB receiving apparatus provides time information of transmitting the extended satellite orbit information together with the extended satellite orbit information, position information of the information terminal, or the time information and the position information to the controller. Information terminal. The method of claim 16, The DMB receiving apparatus further includes a time information extraction module for detecting the extended satellite orbit information transmission time from the broadcast signal. The method of claim 16, The DMB receiving apparatus further comprises a location information extraction module for extracting location information of the DMB broadcasting system from the broadcast information. The method of claim 19, And the location information is latitude / longitude information of a DMB broadcasting station server or a DMB base station detected from a broadcast signal received by the DMB receiving apparatus. The method of claim 16, The control unit, characterized in that for transmitting the position information fixed to an arbitrary position to the GPS receiver. The method of claim 16, The GPS receiver, or the DMB receiver, or the GPS receiver and the DMB receiver are built in or external to the information terminal. The method of claim 16, And the information terminal is a navigation terminal. A GPS receiver for receiving a GPS (Global Positioning System) satellite signal; A DMB receiver configured to receive a digital multimedia broadcasting (DMB) broadcast signal as power is applied and to extract extended satellite trajectory information defined by satellite orbit information prediction values for a specific future period from the broadcast signal; And And a controller for controlling the GPS receiver and the DMB receiver. The GPS receiver stores the extended satellite orbit information received from the control unit, and uses the pseudo-range information measured from the GPS satellite signal and the stored extended satellite orbit information to provide information by A-GPS (Assisted GPS) method. An information terminal, characterized in that for measuring the position of the terminal and transmitting to the control unit. The method of claim 24, The GPS receiver includes a PR measuring module for measuring pseudo range information from information received from a GPS satellite; And A position calculation module for measuring the position of the information terminal using the pseudo range information and the extended satellite orbit information received from the controller; And A memory for storing the pseudorange information and the extended satellite orbit information; Information terminal comprising a. The method of claim 24, The DMB receiving apparatus provides time information of transmitting the extended satellite orbit information together with the extended satellite orbit information, position information of the information terminal, or the time information and the position information to the controller. Information terminal. The method of claim 26, The DMB receiving apparatus further comprises a time information extraction module for detecting the extended satellite orbit information transmission time from the broadcast signal. The method of claim 26, The DMB receiving apparatus further comprises a location information extraction module for extracting location information of the DMB broadcasting system from the broadcast information. 29. The method of claim 28, And the location information is latitude / longitude information of a DMB broadcasting station server or a DMB base station detected from a broadcast signal received by the DMB receiving apparatus. The method of claim 24, The control unit, characterized in that for transmitting the position information fixed to an arbitrary position to the GPS receiver. The method of claim 24, The GPS receiver, or the DMB receiver, or the GPS receiver and the DMB receiver are built in or external to the information terminal. The method of claim 24, And the information terminal is a navigation terminal. As a GPS (Global Positioning System) receiver and a Digital Multimedia Broadcasting (DMB) receiver, each connected internally or externally and having a control unit and a memory, A first step of measuring a pseudo distance from information received from a GPS satellite by the GPS receiver when power is applied to the information terminal; A second step in which the DMB receiving apparatus tunes to a DMB broadcasting system and receives a DMB broadcasting signal when power is supplied to the information terminal; A third step of extracting, by the information terminal, extended satellite orbit information defined by satellite orbit information prediction values for a future specific period from the DMB broadcast signal and storing in the memory; A fourth step of detecting, by the information terminal, time information; A fifth step of extracting, by the information terminal, location information of the information terminal; And A sixth step of the GPS receiver measuring the position of the information terminal using the pseudorange and extended satellite orbit information, the time information, and the location information stored in the memory; Position measuring method comprising a. The method of claim 33, wherein In the third step, the control unit extracts the extended satellite orbit information from the DMB broadcast signal received by the DMB receiving apparatus and stores the location information in the memory. The method of claim 33, wherein In the third step, the DMB receiver extracts the extended satellite orbit information from the DMB broadcast signal and stores the extended satellite orbit information in the memory. The method of claim 33, wherein The fourth step is the position measuring method characterized in that the control unit detects the transmission time of the extended satellite orbit information. The method of claim 33, wherein The fourth step is the position measuring method characterized in that the DMB receiving apparatus detects the transmission time of the extended satellite orbit information from the DMB broadcast signal. The method of claim 33, wherein In the fifth step, the control unit extracts latitude / longitude information of the DMB broadcasting system from the DMB broadcasting signal. The method of claim 33, wherein The fifth step is a position measuring method characterized in that the control unit extracts the position information fixed to an arbitrary position. The method of claim 33, wherein The fifth step is the step of extracting the latitude / longitude information of the DMB broadcasting system from the DMB receiving apparatus by the DMB receiving signal. The method of claim 33, wherein A seventh step of extracting and displaying the number of extended satellite orbit information available for position calculation from the extended satellite orbit information stored in the memory on a display device connected to the information terminal; Position measuring method further comprising a. The method of claim 33, wherein A seventh step of extracting the number of extended satellite orbit information available for position calculation from the extended satellite orbit information stored in the memory and expressing a character or a picture specific to a display device connected to the information terminal; Position measuring method further comprising a. The method of claim 33, wherein A seventh step of extracting and displaying the number of extended satellite orbit information available for position calculation from the extended satellite orbit information stored in the memory on a display device connected to the information terminal; And Eighth step of expressing a character or a picture specific to the display device connected to the information terminal according to the number of extended satellite orbit information available for the position calculation: Position measuring method further comprising a.

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