Classifications

• • G—PHYSICS
  • G08—SIGNALLING
  • G08G—TRAFFIC CONTROL SYSTEMS
  • G08G1/00—Traffic control systems for road vehicles
  • G08G1/09—Arrangements for giving variable traffic instructions
  • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
  • G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
  • G08G1/096833—Systems involving transmission of navigation instructions to the vehicle where different aspects are considered when computing the route
  • G08G1/096838—Systems involving transmission of navigation instructions to the vehicle where different aspects are considered when computing the route where the user preferences are taken into account or the user selects one route out of a plurality
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
  • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
  • G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
  • G01C21/34—Route searching; Route guidance
  • G01C21/3407—Route searching; Route guidance specially adapted for specific applications
  • G01C21/3415—Dynamic re-routing, e.g. recalculating the route when the user deviates from calculated route or after detecting real-time traffic data or accidents
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
  • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
  • G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
  • G01C21/28—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network with correlation of data from several navigational instruments
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
  • G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
  • G01C21/26—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 specially adapted for navigation in a road network
  • G01C21/34—Route searching; Route guidance
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
  • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
  • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
  • G01S19/13—Receivers
  • G01S19/14—Receivers specially adapted for specific applications
• • G—PHYSICS
  • G08—SIGNALLING
  • G08G—TRAFFIC CONTROL SYSTEMS
  • G08G1/00—Traffic control systems for road vehicles
  • G08G1/09—Arrangements for giving variable traffic instructions
  • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
  • G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
  • G08G1/096877—Systems involving transmission of navigation instructions to the vehicle where the input to the navigation device is provided by a suitable I/O arrangement
  • G08G1/096883—Systems involving transmission of navigation instructions to the vehicle where the input to the navigation device is provided by a suitable I/O arrangement where input information is obtained using a mobile device, e.g. a mobile phone, a PDA
• • G—PHYSICS
  • G08—SIGNALLING
  • G08G—TRAFFIC CONTROL SYSTEMS
  • G08G1/00—Traffic control systems for road vehicles
  • G08G1/09—Arrangements for giving variable traffic instructions
  • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
  • G08G1/0968—Systems involving transmission of navigation instructions to the vehicle
  • G08G1/096877—Systems involving transmission of navigation instructions to the vehicle where the input to the navigation device is provided by a suitable I/O arrangement
  • G08G1/096888—Systems involving transmission of navigation instructions to the vehicle where the input to the navigation device is provided by a suitable I/O arrangement where input information is obtained using learning systems, e.g. history databases
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
  • H04W4/02—Services making use of location information
  • H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
  • H04W4/02—Services making use of location information
  • H04W4/024—Guidance services

Definitions

• the present invention relates to a method for providing a navigation service using location information of a mobile terminal, and more particularly, to a method for providing a predetermined navigation service using location information of a base station within the radius of a cell where a mobile terminal is located, even when the GPS receiver of a user does not work properly.
• a navigation system is a system that provides traffic information to cars such as automobiles using an artificial satellite and is also referred to as an automatic navigating system.
• a navigation system receives predetermined data from Global Positioning System (GPS) satellites orbiting the earth using a GPS receiver and calculates its own position based on the received data.
• GPS Global Positioning System
• a navigation system can receive GPS signals from three GPS satellites no matter where the vehicle is located on the earth and calculate its own position based on the GPS signals received from the three GPS satellites.
• the navigation system provides a variety of traffic information to cars such automobiles based on the information on its own position calculated as such.
• the navigation system provides a user with a variety of information including current location information of a car, routing information from a current location to a destination of a car, map information related to the position and routing information, traffic information and the like.
• a GPS receiver for receiving predetermined GPS signals from GPS satellites is usually provided to a user who wants to use a navigation service.
• a GPS receiver is designed so that it can be mounted in the user's car, and a predetermined navigation service is provided to the user based on information of the position of the user that is calculated by the GPS receiver.
• a mobile terminal including such a GPS receiving module therein has been recently developed. Even a PDA (Personal Digital Assistant) can also include a predetermined GPS module therein in order to provide GPS receive capability.
• This conventional navigation system has the following problems: (1) If a GPS receiver is first powered on or has not been used for a long time or if a user moves a long distance (usually about 300 miles) with the GPS receiver turned off, it takes a predetermined time for the GPS receiver to receive GPS signals from one or more GPS satellites and to calculate the current position of the user. This is a so-called "cold start". In such a state, the GPS receiver has no information on the available GPS satellites.
• the GPS receiver Even though the GPS receiver has a little information, the GPS receiver should be again initialized since the current location of the GPS receiver and the position of the GPS satellites do not match.
• the GPS receiver scans all the GPS satellites to collect information on available GPS satellites, performs the process of synchronizing with the available GPS satellites and then calculates its own position. In this case, it takes from 90 seconds to 10 minutes or more for the GPS receiver to receive signals from the GPS satellites and calculate its own position after the GPS receiver has been turned on.
• the GPS receiver calculates its own current position based on GPS signals which are received by using Tokyo, Japan as a reference position. In such a case, it takes considerable time to obtain information on the current position of the user.
• GPS signals may not be received due to a variety of reasons other than the aforementioned cold start or warm start state, and the reception of GPS signals may be interrupted due to various causes while a user drives a car. Therefore, there is a problem in that smooth navigation service cannot be provided to the user due to the aforementioned unexpected reasons.
• a method for providing a navigation service using location information of a mobile terminal according to the present invention is conceived to solve the aforementioned problems in the prior art.
• the present invention aims to provide a user with predetermined path information by using location information of a mobile terminal of the user without predetermined standby time even when a GPS receiver is in a cold start or warm start state. Further, the present invention aims to provide a user with predetermined path information by using location information of a mobile terminal of the user even when a
• the present invention aims to provide a user with predetermined path information by using location information of a mobile terminal of the user even when the user is located at a region where the user cannot receive GPS signals via a personal navigation system.
• the present invention also aims to minimize unnecessary communication fees or standby time by allowing a navigation service to be made using previously provided path information and map data even though a user resumes driving a car after the user stops the car for a short time while using the navigation service or after the user did not use the car for a long time.
• the present invention aims to minimize unnecessary communication fees and standby time, which are produced due to the reception of additional path information and map data, by allowing recently used path information to be stored and the stored path information to be provided to the user at the request of the user.
• a method for providing a navigation service comprising the steps of searching location information of a user's first terminal; receiving the searched location information on the first terminal as source information; receiving predetermined destination information; calculating predetermined path information based on the source information and destination information; providing the calculated path information to the user's first terminal; determining whether a user's second terminal can receive GPS signals; correcting the path information on the basis of the user's location information calculated based on the GPS signals, when the second terminal can receive the GPS signals; and providing the corrected path information to the first terminal.
• a method for providing a navigation service comprising the steps of searching location information of a user's first terminal; receiving the searched location information on the first terminal as source information; receiving predetermined destination information; calculating first path information based on the source information and destination information; providing the calculated first path information to the user's first terminal; determining whether a user's second terminal can receive GPS signals; calculating the user's current location by analyzing the GPS signals, when the second terminal can receive the GPS signals; calculating second path information from the calculated current location to the source; and providing the second path information to the first terminal.
• a method for providing a navigation service comprising the steps of receiving predetermined source information; receiving predetermined destination information; calculating predetermined path information based on the input source information and the input destination information; providing the calculated path information to a user's first terminal; controlling current location information of the user to be stored in a predetermined memory means; determining whether a user's second terminal consistently receives GPS signals; and when it is determined that the user's second terminal does not consistently receive GPS signals, providing to the first terminal the stored current location information of the user and moving direction information on the path information, which is calculated using current moving angle information of the user from a predetermined sensor means.
• a method for providing a navigation service comprising the steps of receiving predetermined source information; receiving predetermined destination information; calculating predetermined path information based on the input source information and the input destination information; providing the calculated path information to a user's first terminal; controlling current location information of the user and the path information to be stored in a predetermined memory means; providing the stored current location information and the path information to the first terminal; receiving an acknowledge response for the stored current location information and the path information from the user; and providing the current location information and the path information to the user's first terminal.
• a method for providing a navigation service comprising the steps of controlling predetermined path information to be stored in a predetermined memory means; controlling one or more said path information stored in the memory means to be displayed on a user's first terminal; selectively receiving one of one or more said path information displayed on the first terminal from the user; and providing the received path information to the first terminal.
• FIG. 1 is a block diagram illustrating a system for obtaining location information of a mobile terminal, which is used in a method for providing a navigation service by using location information of the mobile terminal according to the present invention.
• FIG. 2 is a flowchart illustrating steps of embodying a method for providing a navigation service using location information on a mobile terminal according to a first embodiment of the present invention.
• FIG. 3a is a flowchart illustrating steps for embodying a method for providing a navigation service using location information on a mobile terminal according to a second embodiment of the present invention.
• FIG. 3b is a view showing an example that path information is recalculated in the method for providing the navigation service shown in FIG. 3 a.
• FIG. 1 is a block diagram illustrating a system for obtaining location information of a mobile terminal, which is used in a method for providing a navigation service by using location information of the mobile terminal according to the present invention.
• FIG. 2 is a flowchart illustrating steps of embodying a method for
• FIG. 4 is a flowchart illustrating steps for embodying a method for providing a navigation service using location information on a mobile terminal according to a third embodiment of the present invention.
• FIG. 5 is a flowchart illustrating steps for embodying a method for providing a navigation service using location information on a mobile terminal according to a fourth embodiment of the present invention.
• FIG. 6a is a flowchart illustrating steps for embodying a method for providing a navigation service using location information of a mobile terminal according to a fifth embodiment of the present invention.
• FIG. 6b is a view showing an exemplary screen displayed on a user's mobile terminal in the method for providing the navigation service described with reference to FIG. 6a.
• a term "mobile terminal” used herein refers to a device having a predetermined communication module (for example, a CDMA module) mounted therein for enabling mobile communication.
• the device may include terminals such as a PDA (Personal
• FIG. 1 is a block diagram illustrating a system for obtaining location information of a mobile terminal, which is used in a method for providing a navigation service by using location information of the mobile terminal according to the present invention.
• the system for obtaining the location information of the mobile terminal which is used in the method for providing the navigation service by using the location information of the mobile terminal according to the present invention, includes a mobile terminal 110, a base station 120, a home location register (hereinafter, referred to as "HLR") 130, a location-based service (hereinafter, referred to as "LBS”) server 140 located on the part of a mobile network operator, and a location information server 150.
• HLR home location register
• LBS location-based service
• a service region is divided into predetermined cells wherein one or more base stations 120 are disposed in each cell.
• a mobile terminal 110 located in one cell makes predetermined communications with the base station 120 to perform processes such as synchronization and paging with the base station 120.
• Location information of the mobile terminal 110 which is obtained through the paging process with the base station 120, is recorded in the HLR 130.
• the location information of the mobile terminal 110 which is adopted in the method for providing the navigation service according to the present invention, may be obtained by the following methods: (1) A method of obtaining location information of the mobile terminal 110 using the LBS server 140.
• the mobile terminal 110 maintains base station parameters for a specific base station 120 therein, which are obtained through consistent communications with the base station 120.
• the mobile terminal 110 transmits such base station parameters to the location information server 150 via a mobile communication network.
• the location information server 150 sends the received base station parameters to the LBS server 140 located on the part of the mobile network operator.
• the LBS server 140 supplies location information (longitude and latitude information, address information, etc. of the base station 120) on the base station 120, which corresponds to the base station parameters, to the location information server 150 by using the received base station parameters.
• the location information server 150 sends the received location information on the base station 120 to the mobile terminal 110.
• a paging channel is a channel for transferring additional information, messages on paging, commands, channel allocation, etc. for a specific mobile station to a mobile terminal within a given service region.
• the paging channel can support two transfer speeds, 9600bps and 4800bps. Information on this transfer speed is transferred via a synchronizing channel.
• paging is to determine whether a mobile terminal can receive an incoming call.
• This modulation process of the paging channel includes a similar modulation process, but may include a data scramble process using a paging channel long code mask.
• the mobile terminal is synchronized with a base station through a pilot channel, receives a message of a synchronizing channel to be synchronized with a system and then continues to monitor the paging channel to determine whether the channel can receive a call toward itself.
• the mobile terminal 110 maintains base station parameters for a specific base station 120 therein, which are obtained through consistent communications with the base station 120.
• the location information server 150 requests that the mobile terminal 110 send the base station parameters, by using the paging channel.
• the mobile terminal 110 sends the base station parameters for the specific base station 120 where the mobile terminal 110 is located to the location information server 150 by using the paging channel.
• the location information server 150 transmits the received base station parameters to the LBS server 140 located on the part of the mobile network operator.
• the LBS server 140 supplies location information (longitude and latitude information, address information, etc. of the base station 120) on the base station 120, which corresponds to the base station parameters, to the location information server 150, by using the received base station parameters.
• the location information server 150 sends the received location information on the base station 120 to the mobile terminal 110.
• GPS receiving module is mounted in the mobile terminal 110. GPS signals are received through a GPS receiving module mounted in the mobile terminal 110.
• the mobile terminal 110 sends the received GPS signals to a mobile positioning center (hereinafter, referred to as "MPC") server (not shown) located within the location information server 150.
• the MPC server calculates location information on the mobile terminal 110 by using the received GPS signals and transmits the calculated location information to the mobile terminal 110.
• the location information on the mobile terminal 110 which is used in the method for providing the navigation service according to the present invention, can be obtained through the aforementioned methods. It will be apparent to those skilled in the art that location information on the mobile terminal 110 can be obtained through a variety of methods other than the described method.
• FIG. 2 is a flowchart illustrating steps of embodying a method for providing a navigation service using location information on a mobile terminal according to a first embodiment of the present invention.
• the method for providing the navigation service using the location information of the mobile terminal according to the first embodiment of the present invention is performed as follows.
• a user applies power to a second terminal.
• this second terminal is a GPS receiver.
• a case where power is first applied or power is applied after power has been turned off corresponds to the aforementioned cold start or warm start state, respectively.
• a predetermined standby time (several to 10 or more minutes) is required. Further, there may be a. case where reception of GPS signals is impossible due to a predetermined reason. This may happen when the user drives a car in downtown areas where buildings are crowded or in shadow zones where GPS signals do not reach. This is applied to when a user having a personal navigation system (PNS) is located in an area where the reception of GPS signals is impossible. As such, if it is impossible to search current location information using GPS signals, the steps shown in FIG. 2 may be performed. Location information on the first terminal is searched (S201). According to a preferred embodiment of the present invention, the first terminal is a mobile terminal.
• a method for searching the location information on the first terminal may be performed through the above three methods for obtaining location information.
• the location information of the first terminal obtained through the above method is input as source information of a navigation system (S202). More specifically, the source information input in step S202 is not an exact current location of the first terminal, but is location information on a base station within a cell where the first terminal is located.
• the source information may be replaced by the current location information on the first terminal, as described above, and the user may directly input specific area information.
• the user inputs destination information to the navigation system (S203).
• the navigation system calculates predetermined path information based on source and destination information (S204). Calculated path information is provided to the user's first terminal (S205). The user drives the car according to the provided path information.
• step S209 As the path information corrected in step S209 is provided to the first terminal, it is possible to correct errors in a path, which may occur due to differences between the source information (location information on the base station within the cell where the first terminal is located) input when the navigation service begins and information on a source where the user is actually located. In case of Seoul, one base station within a radius of 500m is usually located.
• Path information provided using location information on the base station within the cell where the mobile terminal is located at the early stage when the terminal does not receive GPS signals can have a predetermined exactness. Since the GPS signals are received after the user has started driving their car, the exact current location of the user is determined and the path information is then corrected. Accordingly, rapid navigation service can be provided to the user. ⁇ Embodiment 2> FIG.
• FIG. 3a is a flowchart illustrating steps for embodying a method for providing a navigation service using location information on a mobile terminal according to a second embodiment of the present invention.
• a method for providing the navigation service using the location information of the mobile terminal according to the second embodiment of the present invention is performed as follows:
• a step of applying power to a second terminal is the same as that described with reference to the first embodiment of the present invention.
• steps shown in FIG. 3a may be carried out.
• Location information of a user's first terminal is searched (S301).
• the first terminal is a mobile terminal.
• the method for searching location information on the first terminal may be performed through the above three methods for obtaining location information.
• Location information of the first terminal obtained through the above methods is input as source information of a navigation system (S302). More specifically, the source information input in step S302 is not the exact current location of the first terminal, but location information of a base station within a cell where the first terminal is located. Similar to step S202 described with reference to FIG. 2, it is possible for the user to directly input specific location information as source information in step S302.
• the user inputs destination information to the navigation system (S303).
• the navigation system calculates first path information based on the source information and the destination information (S304).
• the calculated first path information is provided to the user's first terminal (S305).
• the user drives a car according to the provided path information. It is determined whether the user' second terminal receives GPS signals (S306).
• the second terminal can receive GPS signals. If it is determined that the second terminal is receiving GPS signals, the user's current location information is calculated based on the received GPS signals (S307). Second path information from the current location to the source is calculated based on the calculated current location information and the destination information input in step S303 (S308). The path information calculated in step S308 is info ⁇ nation on the path from the current location to the source, i.e. location where a base station is located. The path information from the base station (source) to the predetermined destination, which is calculated in step S304 when the navigation service begins, becomes first path information.
• the path information from the user's current location to the source becomes second path information. It is then determined whether the calculated second path information is a path that is advantageous to the first path information (S309). This is to determine whether new path information from the current location to the destination is advantageous by comparing the newly calculated second path information and the first path information, or whether it is advantageous to reach the destination along the first path information after moving from the current location to the source (base station). To determine whether it is an advantageous path in step S309, a variety of factors may be employed.
• FIG. 3b is a view showing an example that path information is recalculated in the method for providing the navigation service shown in FIG. 3a. Referring to FIG. 3b, a user begins at a source A. If the user does not receive
• the user sets the location of a base station A' as a source location according to the flowchart shown in FIG. 3 a and receives first path information up to a predetermined destination B. If the user can receive the GPS signals at a current location C, second path information from the current location C to the source A' is calculated according to the flowchart shown in FIG. 3 a. As shown in FIG. 3b, as the second path information (C->A') is disadvantageous to the first path information (A'->B), third path information from the current location C to the destination B is recalculated and is then provided to the user.
• Such third path information may be recalculated in a predetermined moving path search server connected via a predetermined communication network and may be transmitted to the user's first terminal.
• the path information may be recalculated in the user's first terminal. If the path information is recalculated in the moving path search server, the distance of the path to be searched is shortened. It is thus possible to reduce the data size of path information that is sent to the user's terminal. If the path information is recalculated in the user terminal, communications need not to be performed in order to receive the path information and rapid path research can be thus carried out.
• FIG. 4 is a flowchart illustrating steps for embodying a method for providing a navigation service using location information on a mobile terminal according to a third embodiment of the present invention.
• the method for providing the navigation service descried with reference to FIG. 4 is for providing the navigation service when GPS signals are not normally received such as when the power of a user' second terminal is off due to a predetermined cause, while the second terminal receives the GPS signals to manage normal navigation service. Referring to FIG.
• Source information and destination information are first input to a navigation system (S401).
• a user's location information calculated based on received GPS signals and location information on a mobile termmal calculated according to the aforementioned methods might be input as source information.
• Predetermined path information is calculated based on the source and destination information input in step S401 (S402).
• the calculated path information is provided to the user's first terminal (S403).
• Current location of the user, which is calculated based on the received GPS signals, is stored in a predetermined memory means according to a predetermined period (S404).
• the predetermined period may be the same as a reception period of the GPS signals.
• the memory means may be a memory means embedded in the first terminal or may be a portable memory device such as a compact flash (CF) card, a SD card, a memory stick and so on, which can be attached to/detached from the first terminal.
• the memory means having a user's current location stored therein is located at a central system that provides a navigation service. The user's current location may be transmitted to the first terminal via a mobile communication network, if necessary. It is determined whether the second terminal consistently receives GPS signals (S405). If it is determined that the second terminal consistently receives GPS signals, the process returns to step S404, in which the user's current location calculated using the received GPS signals is stored.
• step S405 If it is determined that the second terminal does not receive GPS signals due to a predetermined cause in step S405, information on the direction of movement is consistently displayed on the first terminal, based on the current location information stored in step S404, information on the direction of movement with regard to the path information, which is calculated based on the user's current moving angle information by means of a predetermined sensor means, and the like (S406).
• the sensor means may be an earth magnetic sensor included in the first terminal or a dead reckoning (hereinafter, referred to as "DR") means embedded in the second terminal. Such an earth magnetic sensor senses the Earth's magnetism to detect the user's current direction of movement.
• DR dead reckoning
• the DR means is a device that performs navigation using a gyroscope (or an earth magnetic sensor) and a speed sensor (or an acceleration sensor).
• the DR means can calculate the current location or direction of movement from the user's initial location. According to the aforementioned third embodiment of the present invention, even if the reception of GPS signals is not properly working while the user drives their car, information on the direction of movement can be consistently displayed on the user's first terminal. This allows a navigation service to be smoothly, continuously provided.
• FIG. 5 is a flowchart illustrating steps for embodying a method for providing a navigation service using location information on a mobile termmal according to a fourth embodiment of the present invention.
• the method for providing the navigation service described with reference to FIG. 5 is for providing navigation services if a user begins driving a car after the user stops the car for a short time or for a long time due to various causes while the user drives the car.
• the method for providing the navigation service using the location information of the mobile terminal according to the fourth embodiment of the present invention is performed as follows: Source information and destination information are first input to a navigation system (S501). At this time, a user's location information calculated based on received GPS signals or location information on the mobile terminal calculated according to the aforementioned methods might be input as source information.
• S501 navigation system
• Predetermined path information is calculated based on the source and destination information input in step S501 (S502).
• the calculated path information is provided to the user's first terminal (S503).
• the user's current location calculated based on the received GPS signals and the path information calculated in step S502 are stored in a predetermined memory means (S504).
• the memory means may be a memory means embedded in the first terminal and may be a portable memory device such as a compact flash (CF) card, a SD card, a memory stick and so on, which can be attached to/detached from the first terminal.
• the memory means having a user's current location stored therein is located at a central system that provides a navigation service.
• the current location and the path information may be transmitted to the first terminal via a mobile communication network, if needed. If the user begins driving their car after the user stops the car for a short time or for a long time and connects the first terminal to a predetermined navigation set while separating the first terminal from the predetermined navigation set, a list of current location information and path information stored in step S504 is displayed on the user's first terminal (S505). The user inputs a predetermined acknowledgement response if it is determined that the stored list of the current location information and path information is identical to that of the location information and path information before the car is stopped for a short time or parked for a long time (S506).
• FIG. 6a is a flowchart illustrating steps for embodying a method for providing a navigation service using location information of a mobile terminal according to a fifth embodiment of the present invention.
• the method for providing the navigation service described with reference to FIG. 6a is for providing path information to a user's first terminal if the user selects path information, which has been already used by the user and stored in a predetermined memory means, in order to receive a navigation service.
• the method for providing the navigation service using the location information of the mobile terminal according to the fifth embodiment of the present invention is performed as follows: Information on one or more paths that have already used by a user is stored in a predetermined memory means (S601).
• the memory means may be a memory means embedded in a first terminal and may be a portable memory device such as a compact flash (CF) card, a SD card, a memory stick and so on, which can be attached to/detached from the first terminal.
• the memory means having a user's current location stored therein is located at a central system that provides a navigation service.
• the path information may be transmitted to the first terminal via a mobile communication network, as needed. If the user wants to use the navigation service, a list of path information stored in the memory means is displayed on a display means of the user's first terminal (S602).
• FIG. 6b is a view showing an exemplary screen displayed on a user's mobile terminal in the method for providing the navigation service described with reference to FIG. 6a. If a user selects an item "Guide Recent Road” from a predetermined user interface screen (a) at the same time when a navigation service begins, a list of path information that has recently been used by the user is displayed (b).
• the user selects an item for a path to use from the displayed list.
• Predetermined path information corresponding to the selected item is then provided to the first terminal.
• a series of processes for obtaining a user's current location information for path information that has been used by the user and calculating predetermined path information again may be omitted. Accordingly, it is possible to not only provide rapid navigation service but also reduce unnecessary communication fees, etc. consumed in order to newly receive path information, etc.
• the present invention provides a computer-readable recording medium in which a program for implementing a method for providing a navigation service using location information on a mobile terminal according to respective embodiments of the present invention is recorded.
• the computer-readable recording medium may contain program instructions, data files, data structures, or a combination thereof.
• the program instructions may be ones that are specially designed or written for the present invention or may be ones that are well known to those skilled in the field of computer software.
• the computer-readable recording medium includes a magnetic medium such as a hard disk, a floppy disk and a magnetic tape, an optical medium such as CD-ROM and DND, a magneto-optical medium such as a floptical disk, and hardware devices such as read only memory (ROM), random access memory (RAM) and flash memory that are specially configured to store and execute the program instructions.
• the medium may be a transfer medium such as an optical or metal line and waveguide, including a carrier wave that transmits signals for specifying the program instructions, data structures and the like.
• Examples of the program instructions may include high-level language codes executable by a computer using an interpreter as well as machine language codes such as those written by a compiler.
• the present invention has an effect that it can provide predetermined path information to a user by using location information on a mobile terminal of the user without a predetermined standby time even if a GPS receiver is in a cold start or warm start state. Furthermore, according to a method for providing a navigation service using location information on a mobile terminal, the present invention has an effect that it can provide a user with predetermined path information by using location information of a mobile terminal of the user even when a GPS receiver mounted into a car does not work well due to a number of given problems.
• the present invention has an effect that it can provide a user with predetermined path information by using location information of a mobile terminal of the user even when the user is located at a region where the user cannot receive GPS signals via a personal navigation system. Furthermore, according to a method for providing a navigation service using location information on a mobile terminal, the present invention has an effect that it can minimize unnecessary communication fees or standby time by allowing a navigation service to be made using previously provided path information and map data even though a user resumes driving a car after the user stops the car for a short time while using the navigation service or after the user did not use the car for a long time.
• the present invention has an effect that it can minimize unnecessary communication fees and standby time, which are produced due to the reception of additional path information and map data, by allowing recently used path information to be stored and the stored path information to be provided to the user at the request of the user.

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• Engineering & Computer Science (AREA)
• Radar, Positioning & Navigation (AREA)
• Remote Sensing (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Automation & Control Theory (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Databases & Information Systems (AREA)
• Mathematical Physics (AREA)
• Navigation (AREA)
• Mobile Radio Communication Systems (AREA)
• Telephonic Communication Services (AREA)
• Traffic Control Systems (AREA)

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• 2003
  • 2003-06-27 KR KR1020030042544A patent/KR100555104B1/ko not_active IP Right Cessation
  • 2003-10-22 WO PCT/KR2003/002223 patent/WO2005002089A1/en active Application Filing
  • 2003-10-22 JP JP2005503236A patent/JP4316565B2/ja not_active Expired - Fee Related
  • 2003-10-22 AU AU2003273092A patent/AU2003273092A1/en not_active Abandoned

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