KR100750323B1 - Information terminal and location measuring method therefor - Google Patents

Abstract

An information terminal capable of measuring location information by A-GPS (Assisted GPS) method according to satellite orbit information transmitted from a DMB broadcasting station server, and a location measuring method therefor are provided.

The information terminal of the present invention is connected to a GPS (Global Positioning System) receiving module and a DMB (Digital Multimedia Broadcasting) receiving module, respectively. Receives orbit information, the GPS receiving module receives pseudo range information received from a GPS satellite, and uses A-GPS (Assisted GPS) using satellite orbit information received from a DMB receiving module and pseudo range information received from a GPS receiving module. By measuring the position of the information terminal by the method, it is possible to perform the position determination in the A-GPS method without installing additional hardware or paying a communication fee.

Description

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

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 an embodiment of the present invention;

3 is a detailed configuration diagram of the position measurement module shown in FIG. 2;

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

5 is a flowchart illustrating a position measuring method according to an embodiment of the present invention;

6 is a block diagram of a navigation terminal according to another embodiment of the present invention.

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

10: navigation terminal 20: GPS satellite

30: DMB broadcasting station server 40: DMB base station

110: control unit 120: navigation module

130: GPS receiving module 140: DMB receiving module

150: position measurement module 160: memory

1510: RTC 1520: satellite orbit information management unit

1530: validation unit 1540: DMB receiving module driver

1550: SDI extraction unit 1560: PR measurement unit

1570: position calculation unit

The present invention relates to an information terminal, and more particularly, to an information terminal capable of measuring position information by an A-GPS (Assisted Global Positioning System) method according to satellite orbit information transmitted from a digital multimedia broadcasting (DMB) broadcasting station server. And it relates to a position measuring method for this.

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 location 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. When main power is applied to use the navigation service, the navigation terminal should receive the orbit information and pseudo range (PR) information from the satellite using a GPS receiver to determine the current location of the vehicle. In the event of an obstacle such as being obscured by the back, it takes a few minutes to determine the current location of the vehicle, causing inconvenience to the user. Here, PR refers to the distance between the terminal and the satellite measured from the difference between the time when the signal is transmitted by the satellite and the time when the signal is received by the terminal.

That is, the orbital information of the satellite is updated at the current 4 hour period. When the navigation terminal is checked at the time of departure of the vehicle, the orbital information of the satellite is confirmed. This will take a long time, increasing customer dissatisfaction.

Therefore, when measuring the position using the A-GPS method in the navigation terminal is expected to shorten the time when the initial position grasp.

However, in order to use the current A-GPS method, 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 generated because the mobile terminal must be connected to the mobile communication system every time the location is measured. 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, to provide an information terminal capable of measuring the position by the A-GPS method using the orbit information transmitted from the digital multimedia broadcasting station server and a method for measuring the position for the same There are technical challenges.

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.

The information terminal according to the first embodiment of the present invention for achieving the above technical problem is an information terminal connected to a global positioning system (GPS) receiving module and a digital multimedia broadcasting (DMB) receiving module, respectively. If the satellite orbit information previously stored is not valid, the satellite orbit information is received from the DMB receiving module, the GPS receiving module receives pseudo range information received from a GPS satellite, and the satellite is received from the DMB receiving module. The position of the information terminal may be measured by using the orbit information and the pseudo range information by A-GPS (Assisted GPS).

In addition, the information terminal according to the second embodiment of the present invention is an information terminal connected to a global positioning system (GPS) receiving module and a digital multimedia broadcasting (DMB) receiving module, and having a control unit and a memory. When the main power is applied to the information terminal, the validity of the most recently stored satellite orbit information is checked. If the information is valid, the current position of the information terminal is measured using the satellite orbit information. If the satellite orbit information is not valid, the satellite orbit information is received from the DMB receiving module driven by the controller, and the GPS receiving module receives pseudo range information received from a GPS satellite to measure the position of the information terminal. It further comprises a position measuring module.

In addition, the information terminal according to the third embodiment of the present invention is an information terminal including a global positioning system (GPS) receiving module and a digital multimedia broadcasting (DMB) receiving module. When the satellite orbit information is not valid, the DMB receiving module uses the satellite orbit information received from the DMB broadcasting station system and the pseudo distance information received by the GPS receiving module from the GPS satellite to provide A-GPS (Assisted GPS). It is characterized by measuring the position of the information terminal.

Next, an information terminal according to a fourth embodiment of the present invention is an information terminal including a control unit, a global positioning system (GPS) receiving module, a digital multimedia broadcasting (DMB) receiving module, and a memory, wherein the information terminal is the information terminal. When the main power is applied to the terminal, the validity of the most recently stored satellite orbit information is checked, and if it is valid, the current position of the information terminal is measured using the satellite orbit information, and the most recently stored satellite orbit information is If it is not valid, the DMB receiving module is driven through the controller, and the DMB receiving module uses the satellite trajectory information received from the DMB system and the pseudo range information received by the GPS receiving module from the GPS satellites. The apparatus further includes a position measuring module for measuring the position of the information terminal.

Meanwhile, the information terminal according to the fifth embodiment of the present invention is connected to a GPS receiving module and a digital multimedia broadcasting (DMB) receiving module, respectively, for receiving pseudorange information from a GPS (Global Positioning System) satellite to perform position measurement. An information terminal having a control unit and a memory, wherein the information terminal checks the validity of the most recently stored satellite orbit information when main power is applied to the information terminal, and if the information terminal is valid, converts the satellite orbit information to the GPS receiving module. And receiving the satellite orbit information from the DMB receiving module driven by the controller when the most recently stored satellite orbit information is not valid, and transmitting the satellite orbit information to the GPS receiving module. .

In addition, the information terminal according to the sixth embodiment of the present invention includes a control unit, a GPS (Global Positioning System) receiving module for receiving position measurement by receiving pseudo distance information from a GPS (Global Positioning System) satellite, and Digital Multimedia Broadcasting (DMB). An information terminal having a receiving module and a memory, wherein the information terminal checks the validity of the most recently stored satellite orbit information when main power is applied to the information terminal, and receives the GPS orbit information from the GPS information if the satellite terminal information is valid. Transmits to the module to measure the current position of the information terminal, and if the most recently stored satellite orbit information is invalid, the DMB receiving module is driven through the control unit, and the DMB receiving module is connected to the DMB system. Transmits satellite orbit information received from the mobile station to the GPS receiving module to determine the location of the information terminal. It further comprises a positioning module for determining.

In addition, the position measuring method for an information terminal according to the first embodiment of the present invention is a position measuring method for an information terminal connected to a global positioning system (GPS) receiving module and a digital multimedia broadcasting (DMB) receiving module, respectively. A first step of receiving pseudorange information from a GPS receiving module when main power is applied to the information terminal; A second step of reading the most recently updated satellite orbit information and determining whether it is valid; A fourth step of driving the DMB receiving module to obtain satellite orbit information received from the DMB system when the latest updated satellite orbit information is not valid as a result of the determination in the second step; And a fifth step of calculating the position of the information terminal using the pseudorange information and the satellite orbit information obtained from the DMB receiving module.

In addition, a position measuring method for an information terminal according to a second embodiment of the present invention is a position measuring method for an information terminal having a global positioning system (GPS) receiving module, a digital multimedia broadcasting (DMB) receiving module, and a position measuring module. A first step of receiving the pseudo-range information by the GPS receiving module, when the main power is applied to the information terminal; A second step of determining whether or not the location measurement module reads the most recently updated satellite orbit information and whether it is valid; A third step of driving the DMB receiving module when the latest updated satellite orbit information is invalid as a result of the determination in the second step; A fourth step of the DMB receiving module receiving satellite orbit information from a DMB system; And a fifth step of calculating, by the position measuring module, the position of the information terminal using pseudo range information received by the GPS receiving module and satellite orbit information received by the DMB receiving module.

On the other hand, the position measuring method for an information terminal according to the third embodiment of the present invention is a GPS (Global Positioning System) receiving module for receiving the pseudo-range information from a GPS (Global Positioning System) satellite to perform a position measurement and a digital multimedia broadcasting (DMB) A method of measuring a location for an information terminal connected to a receiving module, respectively, comprising: a first step of determining whether or not the most recently updated satellite orbit information is read as main power is applied to the information terminal; ; A second step of driving the DMB receiving module to obtain satellite orbit information received from the DMB system when the most recently updated satellite orbit information is invalid as a result of the determination in the first step; And transmitting the satellite orbit information obtained in the second step to the GPS receiving module to calculate the position of the information terminal using the pseudo-range information and the satellite orbit information obtained from the DMB receiving module. It includes; a third step to enable.

In addition, a position measuring method for an information terminal according to a fourth embodiment of the present invention includes a GPS (Global Positioning System) receiving module for receiving pseudo-range information from a GPS (Global Positioning System) satellite and performing position measurement, and a digital multimedia broadcasting (DMB). Claims [1] A position measuring method for an information terminal having a receiving module and a position measuring module, comprising: a first step of receiving, by the GPS receiving module, pseudo distance information when main power is applied to the information terminal; A second step of determining whether or not the location measurement module reads the most recently updated satellite orbit information and whether it is valid; A third step of driving the DMB receiving module when the latest updated satellite orbit information is invalid as a result of the determination in the second step; A fourth step of the DMB receiving module receiving satellite orbit information from a DMB system and transmitting the satellite orbit information to the GPS receiving module; And a fifth step of the GPS receiving module calculating the position of the information terminal by using the pseudorange information and the satellite orbit information received in the fourth step.

An example of an information terminal is a navigation terminal, and a navigation terminal currently on the market includes a digital multimedia broadcasting (DMB) receiving module.

Recently, a technology for providing a traffic and travel information (TTI) service using a DMB broadcast signal has been commercialized, and this information can be transmitted through a TPEG 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 be informed in advance of danger zone information such as road construction and accident news.

In the present invention, by using the safety-driving-information (SDI) message included in the TPEG message, satellite orbit information is transmitted from the DMB system consisting of a DMB broadcasting station server and a DMB base station to an information terminal such as a navigation terminal. For example, the A-GPS method may be used to perform location measurement in an information terminal.

In this case, the information terminal having the GPS receiving module and the DMB receiving module can determine the location of the terminal at high speed without installing additional hardware for accessing the base station of the mobile communication system.

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

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

As illustrated, the navigation terminal 10 includes a GPS receiving module 130 and a DMB receiving module 140 to receive orbital information from the satellite 20 and to transmit the SDI transmitted from the DMB broadcasting station server 30. The message is received through the DMB base station 40. In the present embodiment, the case in which the navigation terminal 10 includes the GPS receiving module 130 and the DMB receiving module 140 has been described, but the GPS receiving module 130 and the DMB receiving module 140 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. Regardless of the type of DMB service provided, the DMB broadcasting station server 30 has satellite orbit information on its own. When the orbit information is provided to the navigation terminal 10, the navigation terminal performs position measurement using the A-GPS method. can do.

When the power supply is first applied, the navigation terminal 10 checks whether or not the most recently stored satellite orbit information is valid by referring to the update time of the satellite's orbit information, and when it is valid, the navigation terminal 10 performs location measurement using the most recent orbit information. .

On the other hand, when the most recently stored satellite orbit information is not valid, after driving the DMB receiving module 140 and accessing the DMB base station 40 to receive the SDI message, and extracts the orbit information contained in the SDI message and then Using this, position measurement is performed.

Here, the satellite orbit information transmitted through the SDI message may further include satellite orbit information reception time and / or location information of the DMB broadcasting station server 30, and the location information may be the DMB broadcasting station server 30 or the DMB base station ( Approximate latitude / longitude information in 40).

FIG. 2 is a configuration diagram of the navigation terminal shown in FIG. 1.

As illustrated, the navigation terminal 10 according to the present invention includes a control unit 110, a navigation module 120, a location measurement module 150, and a memory 160. In addition, the GPS receiver module 130 and the DMB receiver module 140 may be mounted in the navigation terminal 10 in an internal or external manner.

The controller 110 controls the overall operation of the navigation terminal 10, and the navigation module 120 uses the road information stored in the memory 160 as the starting and destination information is set by the user. Create and provide it to the user.

In addition, the GPS receiving module 130 receives satellite orbit information and PR from the GPS satellite 20, and the DMB receiving module 140 automatically applies power to the DMB base station 40 under the control of the controller 110. To tune.

The position measurement module 150 checks the validity of the most recently stored satellite orbit information when the main power is applied to the navigation terminal 10, and measures the current position of the navigation terminal 10 using the validity when the main power is applied. On the other hand, if the most recently stored satellite orbit information is invalid, the DMB receiving module 140 is driven through the control unit 110, the DMB receiving module 140 from the SDI message received from the DMB base station 40 Extract satellite orbit information. Then, the position of the navigation terminal 10 is measured by using the satellite orbit information extracted from the SDI message and the PR received by the GPS receiving module 130.

FIG. 3 is a detailed configuration diagram of the position measurement module shown in FIG. 2.

Position measuring module 150 according to an embodiment of the present invention, as shown in Figure 3, RTC (Real Time Clock, 1510), satellite orbit information management unit 1520, validity verification unit 1530, DMB receiving module The driver 1540, the SDI extractor 1550, the PR measurer 1560, and the position calculator 1570 are included.

The RTC 1510 is a clock embedded in the navigation terminal 10, and the satellite orbit information manager 1520 stores the satellite orbit information most recently measured by the location measurement module 150 in the memory 160.

When the main power is applied to the navigation terminal 10, the validity checking unit 1530 reads the most recently stored satellite orbit information from the memory 160 and verifies the validity based on an update period of the satellite orbit information. . For example, if the update period of the satellite orbit information is 4 hours, it is determined that it is not valid if the most recently stored satellite orbit information is stored 4 hours before the current time.

On the other hand, the DMB receiving module driver 1540 requests the controller 110 to drive the DMB receiving module 140 when the most recently stored satellite orbit information is not valid as a result of the validity confirming unit 1530. do. Accordingly, power is automatically applied to the DMB receiving module 140, and the DMB receiving module 140 receives the SDI message broadcast from the DMB base station 40.

The SDI extractor 1550 extracts satellite orbit information from the SDI message received by the DMB receiving module 140, and the PR measuring unit 1560 measures the PR received by the GPS receiving module 130.

On the other hand, if the most recently stored satellite orbit information is valid according to the result confirmed by the validity checker 1530, the position calculation unit 1570 uses the orbit information and the PR to determine the current position of the navigation terminal 10. On the other hand, when the most recently stored satellite orbit information is not valid, the navigation terminal 10 of the navigation terminal 10 is used by using the satellite orbit information extracted by the SDI extraction unit 1550 and the PR measured by the PR measurement unit 1560. Measure your current position.

4 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 receiving module 140, as shown in FIG. TPEG messages have the same container structure, and one of these TPEG messages is an SDI message.

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.

In the present invention, by including satellite orbit information in the reserved area allocated to the manufacturer of the navigation terminal 10 of the event container of the SDI message, the navigation terminal 10 extracts satellite orbit information from the SDI message, GPS The position measurement is performed in the A-GPS method together with the satellite orbit information and the PR received by the receiving module 130. Here, the satellite orbit information transmitted through the SDI message may further include satellite orbit information reception time and / or location information of the DMB broadcasting station server 30, and the location information may be the DMB broadcasting station server 30 or the DMB base station ( Approximate latitude / longitude information in 40).

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

First, as main power is applied to the navigation terminal 10 (S101), the GPS receiving module 130 is driven to measure PR (S103).

Meanwhile, the satellite orbit information management unit 1520 of the position measurement module 150 obtains the current time from the RTC 1510 (S103), and reads the most recently updated satellite orbit information stored in the memory 160. (S105).

In addition, the validity checker 1530 determines whether the satellite orbit information read by the satellite orbit information manager 1520 is valid (S107), that is, when the most recently stored satellite orbit information is before the satellite update cycle. In the case of the track information stored in the control unit 110 to drive the DMB receiving module 140 (S109).

Accordingly, when power is automatically applied to the DMB receiving module 140 (S109), the DMB receiving module 140 tunes to the DMB base station 40 (S111) and receives an SDI message from the DMB base station 40 ( S113).

Thereafter, the SDI extractor 1550 extracts satellite orbit information from the SDI message received by the DMB receiving module 140 (S117) and stores it in the memory 160 (S119). Here, the SDI message may further include satellite orbit information reception time of the DMB broadcasting server and / or approximate latitude / longitude information of the DMB broadcasting server or the DMB base station in addition to the satellite orbit information.

Next, the position calculator 1570 calculates the position of the navigation terminal 10 using the satellite orbit information extracted by the PR and SDI extractor 1550 received by the GPS receiver module 130 (S121).

On the other hand, as a result of the determination in step S109, when the most recently stored satellite orbit information is valid, the position of the navigation terminal 10 is calculated by using the PR received from the GPS receiving module 130 and the previously stored satellite orbit information. (S121).

The position measuring module 150 and the position measuring method described above can 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 module and a DMB receiver module, either internally or externally, and may be included in the SDI message received by the DMB receiving module without having to access a base station of the mobile communication system when measuring a location. Using 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.

6 is a block diagram of a navigation terminal according to another embodiment of the present invention.

Unlike FIG. 3, the navigation terminal 10-1 according to the present exemplary embodiment includes a PR measuring unit 1560 and a position calculating unit 1570 in the GPS receiving module 130-1. That is, since the conventional GPS reception module 130-1 has a PR measurement function and a position calculation function, the pseudo GPS information is obtained by using the same, and the navigation terminal 10-1 according to the validity of previously stored track information. Is performed by the GPS reception module 130-1.

In addition, the RCT 1510, the satellite orbit information management unit 1520, the validity checking unit 1530, the DMB receiving module driving unit 1540, and the SDI extracting unit 1550 included in the position measuring module 150-1 are illustrated in FIG. 3. Since the same function as described in the description, detailed description thereof will be omitted.

In the present embodiment, the GPS receiving module 130-1 and the DMB receiving module 140 may be mounted in the navigation terminal 10-1 internally or externally.

The GPS receiver module 130-1 and the DMB receiver module 140 are mounted in what form, and when embedded, the navigation terminal 10-1 is most recently through the validity checker 1530 when main power is applied. Check the validity of the satellite orbital information stored in. When the most recently stored satellite orbit information is valid, the satellite orbit information is transmitted to the GPS receiving module 130-1 to perform position measurement. On the other hand, when the most recently stored satellite orbit information is not valid, the DMB receiving module driver 1540 drives the DMB receiving module 140 through the control unit 110 and the satellite from the DMB receiving module 140. Receives orbit information and transmits it to the GPS receiving module 130-1.

As such, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features thereof. 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.

According to the present invention, by using the satellite orbit information contained in the SDI message sent from the DMB broadcasting station server without the information terminal connected to the base station of the mobile communication system to obtain satellite orbit information, it is possible to install a separate hardware or to communicate Positioning can be performed in A-GPS mode without paying a fee.

Accordingly, it is possible to improve the location 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.

Claims (36)

An information terminal connected to a global positioning system (GPS) receiving module and a digital multimedia broadcasting (DMB) receiving module, respectively. If the satellite orbit information received from the GPS receiving module is not valid, the satellite orbit information is received from the DMB receiving module, the GPS receiving module receives pseudo range information received from the GPS satellite, and receives the DMB. An information terminal, characterized in that for measuring the position of the information terminal by the A-GPS (Assisted GPS) method using the satellite orbit information received from the module and the pseudo range information. The method of claim 1, And the information terminal obtains a safety-driving-information (SDI) message received by the DMB receiving module from a DMB broadcasting station system, and extracts satellite orbit information from the SDI message. The method of claim 1, The information terminal, when the previously stored satellite orbit information is not valid, the DMB receiving module is automatically driven, and the information obtained by the DMB receiving module tuned to the DMB broadcasting station system to obtain the received satellite orbit information terminal. An information terminal connected to a GPS (Global Positioning System) receiving module and a DMB (Digital Multimedia Broadcasting) receiving module, each having a control unit and a memory, The information terminal checks the validity of the most recently stored satellite orbit information when the main power is applied to the information terminal, and if the information terminal is valid, measures the current position of the information terminal by using the satellite orbit information. If the recently stored satellite orbit information is not valid, the satellite terminal receives the satellite orbit information from the DMB receiving module driven by the controller, and the GPS receiving module receives pseudo range information received from a GPS satellite to receive the information terminal. Information terminal further comprises a position measuring module for measuring the position of the. The method of claim 4, wherein The location measuring module may include: a validity checking unit configured to read validity of the most recently stored satellite orbit information from the memory when main power is applied to the information terminal; A DMB receiving module driver for requesting the controller to drive the DMB receiving module when the most recently stored satellite orbit information is invalid as a result of checking the validity checking unit; An SDI extractor configured to automatically apply power to the DMB receiving module to extract satellite orbit information from the SDI message in response to receiving a Safety-Driving-Information (SDI) message from the DMB system; A PR measuring unit which measures a pseudo distance from the pseudo range information received from the GPS receiving module; And As a result of checking the validity check unit, when the most recently stored satellite orbit information is valid, the current position of the information terminal is measured by using the satellite orbit information and pseudo range information, and the most recently stored satellite orbit information. If is not valid, the position calculation unit for measuring the current position of the information terminal using the satellite orbit information extracted by the SDI extraction unit and the pseudo-range information; Information terminal comprising a. The method of claim 5, And the validity confirming unit checks the validity with reference to an update period of the satellite orbit information of the GPS satellites. An information terminal having a global positioning system (GPS) receiving module and a digital multimedia broadcasting (DMB) receiving module, If the satellite orbit information received by the GPS receiving module from the GPS satellites is not valid, the satellite orbit information received by the DMB receiving module from the DMB broadcasting system and the pseudo range information received by the GPS receiving module from the GPS satellites. Information terminal, characterized in that for measuring the position of the information terminal by the A-GPS (Assisted GPS) method. The method of claim 7, wherein And the information terminal extracts satellite orbit information from a safety-driving-information (SDI) message transmitted from the DMB broadcasting station system. The method of claim 7, wherein And the DMB receiving module is automatically driven when the previously stored satellite orbit information is not valid and tunes to the DMB system to receive satellite orbit information. An information terminal comprising a control unit, a global positioning system (GPS) receiving module, a digital multimedia broadcasting (DMB) receiving module, and a memory, The information terminal checks the validity of the most recently stored satellite orbit information when the main power is applied to the information terminal, and if the information terminal is valid, measures the current position of the information terminal by using the satellite orbit information. If the recently stored satellite orbit information is invalid, the DMB receiving module is driven through the control unit, and the satellite orbit information received by the DMB receiving module from the DMB system and the GPS receiving module are received from the GPS satellites. And a position measuring module for measuring the position of the information terminal by using the pseudorange information. The method of claim 10, The position measuring module may include: a validity checking unit configured to read validity of the most recently stored satellite orbit information from the memory when main power is applied to the information terminal; A DMB receiving module driver for requesting the controller to drive the DMB receiving module when the most recently stored satellite orbit information is invalid as a result of checking the validity checking unit; An SDI extractor configured to automatically apply power to the DMB receiving module to extract satellite orbit information from the SDI message in response to receiving a Safety-Driving-Information (SDI) message from the DMB system; A PR measuring unit for measuring a pseudo range from the pseudo range information received by the GPS receiving module from the GPS satellites; And As a result of checking the validity check unit, when the most recently stored satellite orbit information is valid, the current position of the information terminal is measured by using the satellite orbit information and pseudo range information, and the most recently stored satellite orbit information. If is not valid, the position calculation unit for measuring the current position of the information terminal using the satellite orbit information extracted by the SDI extraction unit and the pseudo-range information; Information terminal comprising a. The method of claim 11, And the validity confirming unit checks the validity with reference to an update period of the satellite orbit information of the GPS satellites. An information terminal having a control unit and a memory, each connected to a GPS receiving module and a digital multimedia broadcasting (DMB) receiving module that receive pseudorange information from a GPS (Global Positioning System) satellite to perform position measurement. The information terminal checks the validity of the most recently stored satellite orbit information when the main power is applied to the information terminal, and if the information terminal is valid, transmits the satellite orbit information to the GPS receiving module and stores the most recently stored information. If the satellite orbit information is invalid, the information terminal further comprises a position measuring module for receiving the satellite orbit information from the DMB receiving module driven by the control unit to transmit to the GPS receiving module. The method of claim 13, The position measuring module may include: a validity checking unit configured to read validity of the most recently stored satellite orbit information from the memory when main power is applied to the information terminal; A DMB receiving module driver for requesting the controller to drive the DMB receiving module when the most recently stored satellite orbit information is invalid as a result of checking the validity checking unit; And When the power is automatically supplied to the DMB receiving module and receives a Safety-Driving-Information (SDI) message from the DMB system, the satellite orbit information is extracted from the SDI message and transmitted to the GPS receiving module. An SDI extractor; Information terminal comprising a. The method of claim 14, And the validity confirming unit checks the validity with reference to an update period of the satellite orbit information of the GPS satellites. An information terminal comprising a control unit, a global positioning system (GPS) receiving module, a digital multimedia broadcasting (DMB) receiving module, and a memory configured to receive pseudorange information from a GPS (Global Positioning System) satellite to perform position measurement. The information terminal checks the validity of the most recently stored satellite orbit information when the main power is applied to the information terminal, and if the information terminal is valid, transmits the satellite orbit information to the GPS receiving module to determine the current position of the information terminal. If the satellite orbit information measured most recently is not valid, the DMB receiving module is driven through the controller, and the GPS orbit information received by the DMB receiving module from the DMB system is received. And a position measuring module for transmitting the module to measure the position of the information terminal. The method of claim 16, The position measuring module may include: a validity checking unit configured to read validity of the most recently stored satellite orbit information from the memory when main power is applied to the information terminal; A DMB receiving module driver for requesting the controller to drive the DMB receiving module when the most recently stored satellite orbit information is invalid as a result of checking the validity checking unit; And When the power is automatically supplied to the DMB receiving module and receives a Safety-Driving-Information (SDI) message from the DMB system, the satellite orbit information is extracted from the SDI message and transmitted to the GPS receiving module. An SDI extractor; Information terminal comprising a. The method of claim 17, And the validity confirming unit checks the validity with reference to an update period of the satellite orbit information of the GPS satellites. The method according to any one of claims 1 to 18, And the information terminal is a navigation terminal. A position measuring method for an information terminal connected to a global positioning system (GPS) receiving module and a digital multimedia broadcasting (DMB) receiving module, respectively, A first step of receiving pseudorange information from a GPS receiving module when main power is applied to the information terminal; A second step of reading the most recently updated satellite orbit information and determining whether it is valid; A third step of driving the DMB receiving module to obtain satellite orbit information received from the DMB system when the most recently updated satellite orbit information is not valid as a result of the determination in the second step; And A fourth step of calculating a position of the information terminal using the pseudorange information and the satellite orbit information obtained from the DMB receiving module; Position measuring method for an information terminal comprising a. The method of claim 20, The second step is a step of determining whether it is valid using the update time of the most recently updated satellite orbit information and the update period of the satellite orbit information of the GPS satellites. Way. The method of claim 20, The third step is a step of extracting satellite orbit information from the safety-driving-information (SDI) message received by the DMB receiving module from the DMB system. . The method of claim 20, A fifth step of calculating the position of the information terminal using the most recently updated satellite orbit information and the pseudorange information when the latest updated satellite orbit information is valid as a result of the determination of the second step; Position measuring method for an information terminal further comprising. A position measuring method for an information terminal having a global positioning system (GPS) receiving module, a digital multimedia broadcasting (DMB) receiving module, and a position measuring module, A first step of receiving, by the GPS receiving module, pseudo distance information when main power is applied to the information terminal; A second step of determining whether or not the location measurement module reads the most recently updated satellite orbit information and whether it is valid; A third step of driving the DMB receiving module when the latest updated satellite orbit information is invalid as a result of the determination in the second step; A fourth step of the DMB receiving module receiving satellite orbit information from a DMB system; And A fifth step of calculating, by the position measuring module, the position of the information terminal using pseudo range information received by the GPS receiving module and satellite orbit information received by the DMB receiving module; Position measuring method for an information terminal comprising a. The method of claim 24, The second step is a step of determining whether it is valid using the update time of the most recently updated satellite orbit information and the update period of the satellite orbit information of the GPS satellites. Way. The method of claim 24, The fourth step includes: a 4-1 step in which the DMB receiving module receives a safety-driving-information (SDI) message from the DMB system; And 4-2 step of extracting satellite orbit information from the SDI message; Position measuring method for an information terminal comprising a. The method of claim 24, A sixth step of calculating a position of the information terminal using the most recently updated satellite orbit information and the pseudorange information when the latest updated satellite orbit information is valid as a result of the determination in the second step; Position measuring method for an information terminal further comprising. A positioning method for an information terminal connected to a global positioning system (GPS) receiving module and a digital multimedia broadcasting (DMB) receiving module for receiving pseudo distance information from a satellite and performing position measurement. A first step of determining whether or not the most recent updated satellite orbit information is valid when main power is applied to the information terminal; A second step of driving the DMB receiving module to obtain satellite orbit information received from the DMB system when the most recently updated satellite orbit information is invalid as a result of the determination in the first step; And Transmitting the satellite orbit information obtained in the second step to the GPS receiving module, so that the GPS receiving module calculates the position of the information terminal using the pseudo-range information and the satellite orbit information obtained from the DMB receiving module. A third step of doing; Position measuring method for an information terminal comprising a. The method of claim 28, The first step is a step of determining whether it is valid using the update time of the most recently updated satellite orbit information and the update period of the satellite orbit information of the GPS satellites. Way. The method of claim 28, In the second step, the DMB receiving module extracts satellite orbit information from a safety-driving-information (SDI) message received from the DMB system. . The method of claim 28, As the determination result of the first step, when the most recently updated satellite orbit information is valid, the most recently updated satellite orbit information is transmitted to the GPS receiving module to update the pseudorange information and the most recently updated satellite orbit information. And a fourth step of calculating the position of the information terminal by using the satellite orbital information. Global Positioning System (GPS) A position measuring method for an information terminal having a Global Positioning System (GPS) receiving module, a DMB (Digital Multimedia Broadcasting) receiving module, and a position measuring module for receiving pseudorange information from a satellite. As A first step of receiving, by the GPS receiving module, pseudorange information when main power is applied to the information terminal; A second step of determining whether or not the location measurement module reads the most recently updated satellite orbit information and whether it is valid; A third step of driving the DMB receiving module when the latest updated satellite orbit information is invalid as a result of the determination in the second step; A fourth step of the DMB receiving module receiving satellite orbit information from a DMB system and transmitting the satellite orbit information to the GPS receiving module; And A fifth step of calculating, by the GPS receiving module, the location of the information terminal using the pseudorange information and the satellite orbit information received in the fourth step; Position measuring method for an information terminal comprising a. The method of claim 32, The second step is a step of determining whether it is valid by using the update time of the most recently updated satellite orbit information and the update period of the satellite orbit information of the GPS satellites. Way. The method of claim 32, The fourth step includes: a 4-1 step in which the DMB receiving module receives a safety-driving-information (SDI) message from the DMB system; 4-2 step of extracting satellite orbit information from the SDI message; And A step 4-3 of transmitting the extracted satellite orbit information to the GPS receiving module; Position measuring method for an information terminal comprising a. The method of claim 32, As a result of the determination in the second step, when the most recently updated satellite orbit information is valid, the most recently updated satellite orbit information is transmitted to the GPS receiving module, and the mall GPS receiving module transmits the pseudo distance information and the And a sixth step of calculating the position of the information terminal by using the most recently updated satellite orbit information. The method according to any one of claims 20 to 35, And the information terminal is a navigation terminal.

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