KR20140100804A - Apparatus and method for providing navigation service based on mobile terminal thereof - Google Patents

Abstract

The present invention relates to an apparatus and a method for providing a mobile terminal based navigation service. The apparatus for providing a mobile terminal based navigation service comprises: a route searching unit which searches for a route between a departure point and a destination based on inputted information on the departure point and the destination; a distance measuring unit which measures a distance from a first position corresponding to the location of a user to a second position corresponding to at least one signal intersection which is included in the searched route; a receiving unit which receives control data on a traffic light positioned at the second position, from a signal management server; a calculating unit which calculates a target driving speed at the first position where the user is located, based on the measured distance and the received control data on the traffic light; and an output unit which displays the calculated target driving speed. The control data on the traffic light corresponds to the remaining green light time of the traffic light. Therefore, the apparatus can allow the user to recognize the time and speed for safely passing the signal intersection.

Description

[0001] APPARATUS AND METHOD FOR PROVIDING NAVIGATION SERVICE BASED ON MOBILE TERMINAL THEREOF [0002]

The present invention relates to an apparatus and method for providing a navigation service based on a mobile terminal, and more particularly, to an apparatus and method for providing a navigation service based on a mobile terminal capable of notifying a user of time and speed for safely passing a signal intersection will be.

Recently, as the spread and use of navigation have been gradually expanded, it has become popular to search for a destination using navigation, or to search for an optimal route based on user's priority, and various types of navigation are being developed.

With regard to a method of providing a navigation service, Korean Patent Registration No. 1096806 discloses a method of passing through a point such as an intersection or a crosswalk during the remaining lighting time of a traffic signal traffic signal.

However, according to the related art, a message is transmitted to a user using an infrared ray transmitter and an LED, and a separate device must be provided without utilizing the existing navigation device or smart terminal. In addition, the passage section guide should be installed at both sides of the intersection, and it is practically impossible to install the passage section guide at every intersection in the whole country.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an apparatus and method for providing a mobile terminal-based navigation service capable of notifying a user of time and speed for safely passing a signal intersection using a mobile terminal.

According to an aspect of the present invention, there is provided an apparatus for providing a mobile terminal-based navigation service, the apparatus including: a route search unit for searching for a route between a source location and a destination location based on input source information and destination information; A distance measuring unit for measuring a distance from a first point corresponding to a user's position to a second point corresponding to at least one signal intersection included in the searched path; A receiver for receiving control data of a traffic light located at the second point from a signal management server; A calculating unit for calculating a target traveling speed at the first point at which the user is located based on the measured distance and the control data of the received traffic light; And an output unit for displaying the calculated target traveling speed, and the control data of the traffic lights includes control data corresponding to the remaining green time of the traffic lights.

The calculating unit may calculate the target running speed at the first point by the following equation.

Here, V 'is the target traveling speed,? Is the remaining green time, and d is the distance between the first point and the second point.

And a sensing unit for sensing a current driving speed at the first point, wherein the calculating unit can determine whether acceleration is required at the first point through the following equation.

Here, V 'is the target running speed, V is the current running speed, and R is the acceleration preventing constant.

Wherein the calculation unit transmits the calculated target driving speed to the output unit when acceleration is not required at the first point at which the user is located and when the acceleration is requested at the first point at which the user is located, To the output unit or to search for the bypass road.

The sensing unit senses the current driving speed using a GPS (Global Positioning System) or a vehicle speed sensor. The vehicle speed sensor includes a reed switch type vehicle speed sensor, a photoelectric type vehicle speed sensor, an electronic vehicle speed sensor, A sensor, and a frequency detection type vehicle speed sensor.

The distance measuring unit may calculate the distance based on position information of the first point and the second point collected through a Global Positioning System (GPS).

The second point may correspond to the closest signal intersection at the first point.

According to another embodiment of the present invention, there is provided a method of providing a navigation service performed in a mobile terminal, the method comprising: searching for a route between the source and destination based on input source information and destination information; Measuring a distance from a first point corresponding to a user's location to a second point corresponding to at least one signal intersection included in the searched path; Receiving control data of a traffic light located at the second point from a signal management server; Calculating a target traveling speed at the first point at which the user is located based on the measured distance and the control data of the received traffic light according to the following equation; And displaying the calculated target driving speed, wherein the control data of the traffic light corresponds to the remaining green time of the traffic light.

Here, V 'is the target traveling speed,? Is the remaining green time, and d is the distance between the first point and the second point.

As described above, according to the present invention, it is possible for the user to recognize the time and speed for safely passing the signal intersection.

1 is a block diagram illustrating a system for providing a mobile terminal-based navigation service according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a mobile terminal-based navigation service providing apparatus shown in FIG. 1. FIG.
FIG. 3 shows an embodiment for explaining the mobile-terminal-based navigation service providing apparatus shown in FIG.
FIG. 4 is a diagram illustrating a process of transmitting and receiving data between the respective components included in the mobile-terminal-based navigation service providing system of FIG. 1 according to an embodiment of the present invention.
5 is a flowchart illustrating a method of providing a mobile terminal-based navigation service according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . Also, when an element is referred to as "including" an element, it is to be understood that the element may include other elements as well as other elements, And does not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a system for providing a mobile terminal-based navigation service according to an embodiment of the present invention. Referring to FIG. 1, a mobile terminal-based navigation service providing system may include a signal management server 100 and a navigation service providing apparatus 300. However, since the mobile-terminal-based navigation providing system is only one embodiment of the present invention, the present invention is not limited to FIG.

At this time, the respective components of FIG. 1 are generally connected through a network 200. For example, as shown in FIG. 1, the signal management server 100 and the navigation service providing apparatus 300 may be connected through the network 200. An example of such a network 200 is a network such as the Internet, a LAN (Local Area Network), a LAN, and the like. But are not limited to, a wireless local area network (WLAN), a wide area network (WAN), a personal area network (PAN), 3G, 4G, LTE and Wi-Fi. The signal management server 100 and the navigation service providing apparatus 300 disclosed in FIG. 1 are not limited to those shown in FIG.

The signal management server 100 may transmit a control signal for controlling a signal region of a certain region or nationwide by at least one signal light. At this time, a plurality of signal lamps may be provided, and the signal management server 100 can manage each signal lamp by assigning an identification number to each signal lamp. Also, the signal management server 100 may manage the control signals of at least one traffic light and the identification numbers by mapping them.

At this time, the signal management server 100 may be implemented as a computer capable of accessing a remote terminal through the network 200. Here, the computer may include, for example, a notebook, a desktop, a laptop, and the like on which a WEB browser is installed.

The navigation service providing apparatus 300 may be a device for searching for a route based on the source and destination information input by the user. At this time, the path can be searched based on at least one priority set by the user or set by default. For example, at least one priority may be shortcut priority, route priority, highway priority, shortest time priority, shortest distance priority, and the like.

The navigation service providing apparatus 300 can provide the target driving speed so that the at least one signal intersection included in the searched route can be traveled at the optimum speed. For example, it is assumed that a plurality of signal intersections are included in the searched path, and the signal intersection closest to the current vehicle position passes through the searched route. At this time, most users do not recognize the remaining green time, so they are suddenly out of the way, and most of the collisions at the signal intersection occur at this time.

The navigation service providing apparatus 300 according to an embodiment of the present invention provides to the user whether or not it can pass through the signal intersection at the current position using the distance from the current vehicle position to the signal intersection and the remaining green time do. Here, the remaining green time means the time remaining until the green lighting of the traffic lights is completed.

Further, an embodiment of the present invention includes not only when the vehicle moves to a destination but also when the user moves on foot or rides a bicycle. For example, if the current traffic light is illuminated with a red light, the user traveling on foot often does not know how much of the red on-lamp time is remaining and often walks slowly to the traffic light or rushes to the traffic light too quickly. In this case, the navigation service providing apparatus 300 according to an embodiment of the present invention notifies the user of the remaining time of the red lighting remaining time from a few seconds to a few minutes, It is difficult to cross the traffic lights, so it is possible to inform the user of information such as proceeding slowly.

The navigation service providing apparatus 300 may be implemented as a computer capable of accessing a remote terminal through the network 200. Here, the computer may include, for example, a notebook equipped with a web browser (WEB Browser), a laptop, and the like. In addition, the navigation service providing apparatus 300 may be implemented as a terminal capable of connecting to a remote server through the network 200. The navigation service providing apparatus 300 is a wireless communication apparatus that is guaranteed to be portable and mobility, for example, a personal communication system (PCS), a global system for mobile communications (GSM), a personal digital cellular (PDC) System, a PDA (Personal Digital Assistant), an IMT (International Mobile Telecommunication) -2000, a Code Division Multiple Access (CDMA) -2000, a W-CDMA (W-CDMA) A handheld based wireless communication device such as a smartphone, a smartpad, a tablet PC, and the like.

Hereinafter, the configuration of the mobile-terminal-based navigation service providing apparatus 300 of FIG. 1 will be described more specifically.

FIG. 2 is a block diagram for explaining a mobile-terminal-based navigation service providing apparatus shown in FIG. 1, and FIG. 3 shows an embodiment for explaining a mobile-terminal-based navigation service providing apparatus shown in FIG.

2, the navigation service providing apparatus 300 includes a route search unit 310, a distance measuring unit 320, a receiving unit 330, a calculating unit 340, and an output unit 350. At this time, the navigation service providing apparatus 300 may further include a sensing unit 360. However, the navigation service providing apparatus 300 shown in FIG. 2 is only one embodiment of the present invention, and various modifications are possible based on the components shown in FIG. For example, the navigation service providing apparatus 300 may further include an administrator interface for receiving a command or information from an administrator. In this case, the manager interface may be an input device such as a keyboard, a mouse, or the like, but may be a graphical user interface (GUI) represented on a video display device.

The path search unit 310 searches for a path between the source and destination based on the input source information and destination information. At this time, the path search unit 310 can further search information of at least one signal intersection included in the searched path. In addition, the information of the at least one signal intersection may include position information of the signal intersection where the signal intersection is located, position information and identification information of at least one signal installed at the corresponding position, subject information for sending a control signal to the signal, and the like .

The distance measuring unit 320 measures a distance to a second point corresponding to at least one signal intersection included in the path that is searched at the first point corresponding to the position of the user. Here, the second point may be a point corresponding to the closest signal intersection at the first point. For example, when the user is located at the (0, 0) point with respect to the X axis, the A signal is located at the (3, 0) point, the B signal is located at the (4, 0) point, It is assumed that the C signal light is located. In this case, when the user moves straight in the + X direction, the signal intersection to be firstly passed may be the (3, 0) point at which the A signal closest to the (0, 0) point is located.

Also, the distance measuring unit 320 may measure the distance based on the position information of the first point and the second point collected through the Global Positioning System (GPS). For example, if the first point, which is the current user's position, is (0, 0) and is measured by GPS, the position information of the second point is already stored as the signal intersection position information of the path search unit 310, The distance between the two points can be measured using the position information of the first point and the second point. At this time, the measured distance may be converted into km units.

The receiving unit 330 receives the control data of the signal lamp located at the second point from the signal management server 100. At this time, the receiving unit 330 may receive the control data of the traffic lights at regular intervals, or may receive the control data of the traffic lights in real time. At this time, the control data may include a lighting period of a traffic light located at the second point, for example, data on how many seconds have elapsed the green lighting time based on the current time. In this case, the first point and the second point are not fixed positions or places, but may be a first point wherever the current user or the vehicle is located when the user or the vehicle moves, and the second point may be the first point The second point can be anywhere the signal intersection closest to the point or where the traffic light is located.

The calculating unit 340 calculates the target traveling speed at the first point at which the user is located based on the measured distance and the control data of the received traffic lights. At this time, the control data of the traffic light may include control data corresponding to the remaining green time of the traffic lights, and may further include control data corresponding to the remaining red time.

At this time, the calculating unit 340 can calculate the target traveling speed at the first point by the following equation (1).

Here, V 'is the target traveling speed,? Is the remaining green time, and d is the distance between the first point and the second point. Here, the unit of V 'is km / h, the unit of d is km, and the unit of α is sec, so multiply 1/3600 to change the unit of seconds to hour. Also, since km / h is a unit of speed used in most vehicles, it can be changed to m / s when a moving object is a person or a bicycle other than a vehicle. In this case, the unit of d is changed to m, You do not have to multiply by 3600.

For example, assuming that the remaining green time is 7 seconds and the distance from the current location to the nearest traffic light is 0.1 km, if it is substituted into Equation 1, the vehicle is traveling at a speed of 51 km / h in order to cross the green light- The result is that it should be done.

The output unit 350 displays the calculated target running speed and outputs the target running speed through sound or display.

The sensing unit 360 may sense the current traveling speed at the first point. At this time, the sensing unit 360 can sense the current traveling speed using a GPS (Global Positioning System) or a vehicle speed sensor. Here, the vehicle speed sensor may include at least one of a reed switch type vehicle speed sensor, a photoelectric type vehicle speed sensor, an electronic vehicle speed sensor, a voltage detection type vehicle speed sensor, and a frequency detection type vehicle speed sensor, A detailed description thereof will be omitted.

The calculation unit 340 can determine whether acceleration is required at the first point by using the following equation (2).

Here, V 'is the target running speed, V is the current running speed, and R is the acceleration preventing constant. The acceleration prevention constant may be a designation constant that allows the speed to be increased to the extent that the safety of the driver is guaranteed. For example, if R is set to 0.3, more than 30% may not be able to accelerate. That is, when R is assumed to be 0.3, V '= 1.3 V when Equation (2) is set to an equation and both terms are summarized. Therefore, the target running speed V 'is set so as not to exceed 1.3 times the current running speed V.

If the ratio of the two velocities exceeds R, a sudden acceleration is required and a safety problem may occur. Therefore, the navigation service providing apparatus 300 may provide the decelerated appropriate velocity value to pass through the next signal or provide only the remaining green time can do.

Further, when the ratio of the two speeds exceeds R, the navigation service providing apparatus 300 may search for the bypass road. For example, if the ratio of the two speeds exceeds R and the atmospheric air is required for one cycle at an arbitrary signal intersection, the bypass route through the left or right turn can be searched. Here, if the detour distance is calculated in the navigation service providing apparatus 300, the deceleration information may be provided.

On the other hand, when the ratio of the two speeds does not exceed R, the navigation service providing apparatus 300 can suggest an appropriate speed to induce safe passage without changing the abrupt speed. At this time, the driver can provide the remaining green time information together with the target driving speed, which is the proposed speed, to ignore the sudden acceleration. It may also continuously provide a warning message that a dangerous situation may occur during acceleration passage. At this time, when the user moves on foot, the user may be provided with a message that the user may hurl or be injured if the user jumps, and may transmit a message that the user may collide with the car if the user moves by bicycle.

Therefore, when the acceleration is not required at the first point where the user is located, the calculating unit 340 transmits the calculated target driving speed to the output unit 350, and when acceleration is required at the first point, To the output unit 350 or re-search the bypass road.

An embodiment of the above-mentioned equation (2) will be described with reference to Fig. FIG. 3A is a view for explaining a case where the ratio of two speeds does not exceed R, and FIG. 3B is a view for explaining a case where a ratio of two speeds exceeds R. FIG.

(a), the current traveling speed V is 43 km / h, the distance from the current position to the position where the traffic light is located is 0.4 km, the remaining green time is 28 seconds, and the acceleration prevention constant R is 0.2 will be. That is, it is set so as not to accelerate more than 20% from the current running speed. V 'is calculated to be 51 km / h, and V and V' are substituted into Equation 2, R is 0.19, which means that the acceleration preventing constant is not exceeded. At this time, depending on the state of the road, the acceleration preventing constant may be set and changed differently depending on the degree of aging of the vehicle.

In such a case, the navigation service providing apparatus 300 according to the embodiment of the present invention can output the target traveling speed because the safety problem does not occur even if acceleration occurs.

(b), the current traveling speed V is 50 km / h, the distance from the current position to the location of the traffic light is 0.2 km, the remaining green time is 7 seconds, and the acceleration prevention constant R is 0.2 will be. That is, it is set so as not to accelerate more than 20% from the current running speed. V 'is calculated to be 102 km / h, and V and V' are substituted into Equation 2, R is 1.04, which is larger than the acceleration prevention constant.

In such a case, the navigation service providing apparatus 300 according to an embodiment of the present invention may output only the remaining green time because a safety problem may occur when acceleration is performed, and a warning message may also be output at this time .

2, the navigation service providing apparatus 300 collects the control data of the traffic light until it reaches the destination, measures the distance to the traffic light closest to the current position, and determines whether or not the traffic light can pass through the traffic light Is calculated through Equations 1 and 2, and the process of outputting the result to the user can be repeated. At this time, although the description has been made on the basis of the vehicle, it goes without saying that the present invention can be applied to a user who moves on foot or a user who uses a bicycle.

The navigation service providing apparatus 300 according to an embodiment of the present invention can determine whether or not the user can pass the front intersection safely based on the current speed and can recognize the information based on the current speed, It can contribute to adhering to the proper speed, and can reduce the incidence of traffic accidents.

FIG. 4 is a diagram illustrating a process of transmitting and receiving data between the respective components included in the mobile-terminal-based navigation service providing system of FIG. 1 according to an embodiment of the present invention. The method for providing a mobile terminal-based navigation service according to an embodiment shown in FIG. 4 includes steps that are processed in a time-series manner in an apparatus 300 for providing a navigation service according to an embodiment shown in FIG. Hereinafter, an example of a process of transmitting and receiving a signal according to an embodiment of the present invention will be described with reference to FIG. 4. However, the present invention is not limited to such an embodiment, and according to various embodiments described above, It is apparent to those skilled in the art that the process of transmitting and receiving data shown in FIG.

First, it is assumed that a user aboard the vehicle enters the destination information in the navigation service providing apparatus 300 and moves. Then, as shown in FIG. 4, the navigation service providing apparatus 300 confirms whether the input of the source information and the destination information is completed (S410).

The navigation service providing apparatus 300 searches for a route based on the starting point information and the destination information (S420), and at a first point corresponding to the position of the user, the navigation service providing apparatus 300 searches for a route corresponding to at least one signal intersection included in the searched route The distance to the two points is measured (S430).

Next, the navigation service providing apparatus 300 requests the signal management server 100 for the control data of the signal lamp located at the second point (S441), and the signal management server 100 transmits the request data in response to the request (S443).

The navigation service providing apparatus 300 calculates the target traveling speed at the first point at which the user is located based on the measured distance and the control data of the traffic light (S450), and detects the current traveling speed at the first point (S460 ).

If it is determined in step S470 that acceleration is not required at the first point in step S470, the navigation service providing apparatus 300 displays the target driving speed in step S490. If acceleration is required at the first point in step S470, (S480). Here, if acceleration is required (S470), the process of waiting for one cycle may be omitted and a bypass path may be provided.

In addition, the process of one time period S _n , which is the above-described steps S410 to S490, is a process in which one rectilinear section S _n is terminated and a new section S _{n +1} is set, The above-described calculation process can be repeated.

4, the method for providing the navigation service based on the mobile terminal can be easily deduced from the same or described contents of the method for providing the navigation service based on the mobile terminal The description will be omitted.

The order between the above-described steps S410 to S490 is only an example, but is not limited thereto. That is, the order between the above-described steps S410 to S490 may be mutually varied, and some of the steps may be executed simultaneously.

5 is a flowchart illustrating a method of providing a mobile terminal-based navigation service according to an embodiment of the present invention. Referring to FIG. 5, the navigation service providing apparatus searches for a route between a source location and a destination location based on input source information and destination information (S510).

The navigation service providing apparatus 300 measures the distance from the first point corresponding to the user's position to the second point corresponding to the at least one signal intersection included in the searched route (S520) From the signal management server (S530).

Then, the navigation service providing apparatus 300 calculates the target traveling speed at the first point at which the user is located (S540) based on the measured distance and the control data of the received traffic light, and displays the calculated target traveling speed (S550).

The method for providing the navigation service based on the mobile terminal of FIG. 5 is not described. The navigation service based on the method of providing the navigation service based on the mobile terminal can be easily derived from the same or described contents So that the description will be omitted.

The method of providing a mobile terminal based navigation service according to an embodiment described with reference to FIG. 5 may be distributed in the form of an application executed by a computer, or may be a program recorded on a recording medium including a command executable by a computer such as a program module But may also be implemented in other forms. Computer readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. In addition, the computer-readable medium may include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Communication media typically includes any information delivery media, including computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transport mechanism.

As described above, according to the embodiment of the present invention, it is possible to recognize the time and speed for safely passing the signal intersection to the user, and to reduce the accident rate at the signal intersection where most collision occurs.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

Claims (9)

A route search unit for searching for a route between the start point and the destination based on the inputted start point information and the destination information;
A distance measuring unit for measuring a distance from a first point corresponding to a user's position to a second point corresponding to at least one signal intersection included in the searched path;
A receiver for receiving control data of a traffic light located at the second point from a signal management server;
A calculating unit for calculating a target traveling speed at the first point at which the user is located based on the measured distance and the control data of the received traffic light; And
And an output unit for displaying the calculated target running speed
Lt; / RTI >
Wherein the control data of the traffic light includes control data corresponding to the remaining green time of the traffic light.
The method according to claim 1,
Wherein the calculating unit calculates the target traveling speed at the first point by the following equation:

Here, V 'is the target traveling speed,? Is the remaining green time, and d is the distance between the first point and the second point.
The method according to claim 1,
A sensing unit sensing a current traveling speed at the first point;
Further comprising:
Wherein the calculating unit determines whether acceleration is required at the first point by using the following equation:

Here, V 'is the target running speed, V is the current running speed, and R is the acceleration preventing constant.
The method of claim 3,
The calculating unit calculates,
When the acceleration is not required at the first point where the user is located, the calculated target driving speed is transmitted to the output unit,
Wherein when the acceleration is requested at a first point at which the user is located, the remaining green time is transmitted to the output unit or the bypass route is rediscovered.
The method of claim 3,
The sensing unit senses the current driving speed using a Global Positioning System (GPS) or a speed sensor,
Wherein the vehicle speed sensor includes at least one of a reed switch type vehicle speed sensor, a photoelectric type vehicle speed sensor, an electronic vehicle speed sensor, a voltage detection type vehicle speed sensor, and a frequency detection type vehicle speed sensor.
The method according to claim 1,
Wherein the distance measuring unit measures the distance based on position information of the first point and the second point collected through a GPS (Global Positioning System).
The method according to claim 1,
Wherein the second point corresponds to the closest signal intersection at the first point.
A method of providing a navigation service performed in a mobile terminal,
Searching for a path between the starting point and the destination based on the inputted starting point information and the destination information;
Measuring a distance from a first point corresponding to a user's location to a second point corresponding to at least one signal intersection included in the searched path;
Receiving control data of a traffic light located at the second point from a signal management server;
Calculating a target traveling speed at the first point at which the user is located based on the measured distance and the control data of the received traffic light according to the following equation; And
Displaying the calculated target running speed;
Lt; / RTI >
Wherein the control data of the traffic light corresponds to the remaining green time of the traffic light.

Here, V 'is the target traveling speed,? Is the remaining green time, and d is the distance between the first point and the second point.
9. The method of claim 8,
Sensing a current traveling speed at the first point;
Further comprising:
Based navigation service providing apparatus according to claim 1, wherein:

Here, V 'is the target running speed, V is the current running speed, and R is the acceleration preventing constant.

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