CA3045435A1

CA3045435A1 - Pedestrian protecting system and method for operating the same

Info

Publication number: CA3045435A1
Application number: CA3045435A
Authority: CA
Inventors: Youn-Soon KIM; Hyun-Seok Choi; Dong-Yual SUAL
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-11-30
Filing date: 2017-11-20
Publication date: 2018-06-07
Also published as: WO2018101664A1; KR101923720B1; KR20180061951A

Abstract

The present invention relates to a smart signal light provided around a crosswalk and comprises: a beacon module for periodically transmitting a beacon signal; a pedestrian signal learning module for learning the operation of a pedestrian signal light; a memory for storing data learned through the pedestrian signal learning module; and a control unit for calculating waiting remaining time information and walking remaining time information on the basis of the learning data stored in the memory and generating a beacon signal including the calculated waiting remaining time information and/or walking remaining time information.

Description

[DESCRIPTION]
[Invention Title]
PEDESTRIAN PROTECTING SYSTEM AND METHOD FOR OPERATING
THE SAME
[Technical Field]
The present invention relates to a system for protecting a pedestrian on a crosswalk, and a method for operating the same. More particularly, the present invention relates to a pedestrian protection system which can safely protect a pedestrian (a smartphone zombie or a visually handicapped person) who enters into a crosswalk by using a smart traffic light and a mobile terminal of a pedestrian from a traffic accident, and a method for operating the same.
[Background Art]
The functions of mobile terminals have become various. For example, the functions of mobile terminals include a function of communication of data and voice, a function of capturing pictures and videos through cameras, a function of recording voice, a function of reproducing music files through a speaker system, and a function of outputting images or videos on a display unit. Some terminals are further provided with an electronic game play function or perform multimedia player functions. In particular, the recent mobile terminals may receive multicast signals that provide visual contents, such as broadcasts, television programs, or videos.
As the functions of the terminals become various, the terminals are realized in the form of multimedia players provided with complex functions, for example,

2 photographing pictures or videos, reproduction of music or video files, and reception of broadcasts.
The mobile terminals realized in the form of multimedia devices have become necessaries of modern people, and the average times used by the terminal users are also gradually increasing. According to the trend, various cases/accidents are generated due to the pedestrians who are indulged in the mobile terminals. In particular, the pedestrians who enter into crosswalks may face very dangerous situations.
Accordingly, a measure for safely protecting the pedestrians who cross the crosswalks while being indulged in the mobile terminals is necessary.
[Disclosure]
[Technical Problem]
An objective of the present invention is to solve the above and other problems.
Another objective of the present invention is to provide a pedestrian protecting system which may safely protect a pedestrian who enters into a crosswalk by using a smart traffic light and a mobile terminal of the pedestrian, and a method for operating the same.
Another objective of the present invention is to provide a smart traffic light which may learn an operation of a walking traffic light, generate walking signal information related to the safety of a pedestrian, and provide the generated walking signal inforniation to a mobile teiminal of the pedestrian, and a method for operating the same.
Another objective of the present invention is to provide a mobile terminal which may recognize a location of a pedestrian on the basis of a signal transmitted from one or more smart traffic lights, and provide a notification signal corresponding to the location of the pedestrian, and a method for operating the same.

3 [Technical Solution]
In accordance with an aspect of the present invention, there is provided a smart traffic light including: a beacon output module configured to periodically transmit a beacon signal, and vary a transmission output to three or more and transmit information;
a walking signal learning module configured to learn an operation of a walking traffic light; a memory configured to store data learned through the walking signal learning module; and a control unit configured to calculate standby residual time information and walking residual time information based on the learning data stored in the memory, and guide a visually handicapped person to a traffic light by providing and transmitting one or more pieces of information, except for traffic light data including at least one of the calculated standby residual time information and the calculated walking residual time information and learned by varying a transmission output of a beacon such that a location of the beacon is guided and an arrival of the beacon is notified.
More preferably, the beacon signal may further include at least one of identification information of the smart traffic light, location data of the smart traffic light, data on a distance between the smart traffic light and an adjacent smart traffic light, deviation time information for synchronizing an operation cycle of the walking traffic light and an operation cycle of the beacon signal, and infoimation on whether a response signal corresponding to the beacon signal has been transmitted.
More preferably, the walking signal learning module may collect information on an operation time of a red lamp and an operation time of a green lamp from the walking traffic light and a traffic signal controller, and may learn the collected information. Further, when an operation cycle of the walking traffic light is changed, the walking signal learning module deletes the learned data stored in the memory, and learns a changed operation state of the walking traffic light again.
More preferably, the smart traffic light may further include: a pedestrian detecting module configured to detect a pedestrian who approaches the walking traffic

4 light on the basis of whether a response signal corresponding to the beacon signal is received. Further, when the pedestrian is detected, the control unit transmits a control signal for cancelling a vehicle priority signal to a traffic signal controller.
More preferably, the smart traffic light may further include: a deviation time deteimining unit configured to determine a deviation time for synchronizing an operation cycle of the walking traffic light and a transmission cycle of the beacon signal. Further, the deviation time deteimining unit determines a first deviation time corresponding to a time difference between an operation initiating time point of a green walking traffic light and a transmission time point of the beacon signal during an operation of the green walking traffic light. The deviation time determining unit determines a second deviation time corresponding to a time difference between an operation initiating time point of a red walking stop traffic light and a transmission time point of the beacon signal when a red stop signal light is operated.
More preferably, the smart traffic light may further include: a display unit configured to display the walking residual time information of the walking traffic light.
In accordance with another aspect of the present invention, there is provided a mobile teiminal including: a wireless communication unit configured to receive a plurality of beacon signals from a plurality of smart traffic lights located around a crosswalk; a control unit configured to calculate infolination on distances between a pedestrian and a plurality of smart traffic lights by using the beacon signals, detect infoiniation on the relative locations of the pedestrian on the basis of the calculated information on the distances, and generate a notification signal corresponding to a location of the pedestrian; and an output unit configured to output a notification signal generated by the control unit.
More preferably, the control unit may select a beacon signal having the highest received signal strength indication (RSSI), and parsing infoimation included in the selected beacon signal.
Further, the control unit outputs a first notification signal including infoimation on a standby residual time of the pedestrian when the pedestrian is located in an adjacent sidewalk area of the crosswalk, and outputs a second notification signal which warns that the pedestrian trespasses on a safety line of the crosswalk when the pedestrian trespasses on the safety line of the crosswalk.
More preferably, the control unit may calculate a residual spending time on the

5 basis of a movement speed of the pedestrian and a left distance of the crosswalk when the pedestrian moves on the crosswalk, and may output a notification signal that warns that a change of a signal of the walking traffic light is coming near when a walking residual time included in a specific beacon signal is smaller than the calculated residual spending time.
In accordance with an aspect of the present invention, there is provided a vehicle including: a wireless communication unit configured to receive a plurality of beacon signals from a plurality of smart traffic lights located around a crosswalk; a control unit configured to calculate infatination on distances between the vehicle and a plurality of smart traffic lights by using the beacon signals, detect information on the relative locations of the vehicle on the basis of the calculated information on the distances, and generate a notification signal corresponding to a location of the vehicle;
and an output unit configured to output a notification signal generated by the control unit.
[Advantageous Effects]
The pedestrian protection system and the method for operating the same according to the embodiments of the present invention will be described as follows.
According to at least one of the embodiments of the present invention, the pedestrians who enter into cross-walks while being indulged in mobile terminals can be safely protected from a traffic accident by outputting a notification signal corresponding to the locations of the pedestrians by using a beacon signal periodically transmitted from the smart traffic light.

6 Further, according to at least one of the embodiments of the present invention, various services may be provided to the mobile terminals of the pedestrians who are adjacent to the smart traffic light, by periodically broadcasting a beacon signal including device identification infoimation, location information, and walking signal information of the smart traffic light.
Meanwhile, the advantageous effects that may be achieved by the pedestrian protection system and the method for operating the same according to the embodiments of the present invention are not limited to the above-mentioned ones, and the above-mentioned and other advantageous effects will be clearly understood by those skilled in the art to which the present invention pertains.
[Brief Description of the Drawings]
FIG. 1 is an overall diagram of a pedestrian protecting system according to an embodiment of the present invention;
FIG. 2 is a block diagram illustrating a configuration of a mobile terminal according to an embodiment of the present invention;
FIG. 3 is a block diagram illustrating a configuration of a smart traffic light system according to an embodiment of the present invention;
FIG. 4A is a view illustrating a structure of a beacon frame according to an embodiment of the present invention;
FIG. 4B is a view illustrating correction time information which is inserted into the beacon frame of FIG. 4A;
FIG. 5 is a flowchart which is referenced for describing an operation of a smart traffic light according to an embodiment of the present invention;
FIG. 6 is a flowchart which is referenced for describing an operation of a mobile tettninal according to an embodiment of the present invention;

7 FIGS. 7A to 7C are views which are referenced for describing notification signals corresponding to locations of a pedestrian;
FIG. 8 is a block diagram illustrating a configuration of a vehicle according to an embodiment of the present invention; and FIG. 9 is a flowchart which is referenced for describing an operation of a vehicle according to an embodiment of the present invention.
[Best Mode]
Hereinafter, embodiments disclosed in the specification will be described in detail with reference to the accompanying drawings, and regardless of reference symbols, the same or like elements are provided with the same reference numerals and a repeated description thereof will be omitted. The terms 'module' and 'unit' for the elements are given or used in combination to easily write the specification, and do not have distinguished meanings or functions. That is, the term 'unit' used in the present invention refers to a hardware element, such as software, an FPGA, or an ASIC, and 'units' perform some functions. However, the 'unit' or 'module' is not limited to software or hardware. The 'unit' may be constituted in a storage medium that may perform addressing, and may be configured to reproduce one or more processors.
Accordingly, as an example, the 'unit' includes elements such as software elements, object-oriented software elements, class elements, and task elements, processes, functions, attributes, procedures, sub-routines, segments of a program code, drivers, firmware, micro-codes, circuits, data, a database, data structures, tables, arrays, and parameters. The elements and the functions provided in the 'units' may be combined by a smaller number of elements or a smaller number of 'units' or may be separated into additional elements or additional 'units'.
Further, when the embodiments disclosed in the specification are described, a detailed description thereof will be omitted when it makes the essence of the

8 embodiments disclosed in the specification rather obscure. Further, the accompanying drawings are provided only to help understand the embodiments disclosed I the specification more easily but the technical spirit disclosed in the specification is not limited by the accompanying drawings and it construed to include all changes, equivalents, and replacements included in the spirit and technical range of the present invention.
The present invention suggests a pedestrian protecting system which may safely protect a pedestrian who enters into a crosswalk by using a smart traffic light and a mobile tenninal of the pedestrian, and a method for operating the same.
Hereinafter, various embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an overall diagram of a pedestrian protecting system according to an embodiment of the present invention.
Referring to FIG. 1, the pedestrian protecting system 100 according to the present invention may include one or more smart traffic light system 110 installed in a crosswalk 130, a mobile terminal 120 of a pedestrian, a crosswalk 130, a traffic signal controller 140, and a bottom traffic light (not illustrated).
The traffic light system 110 may include a pedestrian traffic light 111, a light transmitting lamp 112, and a smart traffic light 113. Here, the smart traffic light 113 may embed a pedestrian residual time display.
The pedestrian traffic lights 111 are installed on opposite sidewalks with respect to the crosswalk 130 of the road, respectively, and may include not only a general streetlight including a red lamp and a green lamp but also various kinds of traffic lights.
The pedestrian traffic light 111 alternately operates a red lamp and a green lamp at a predetermined time cycle according to a control of the traffic signal controller installed in an adjacent area of the crosswalk 130. Then, a time period for which the red lamp is turned on and a time period for which the green lamp is turned on may be differently set, and the smart traffic light learns them.

9 The light transmitting lamp 112 is a lighting device which may brighten the crosswalk 130 brightly to secure the fields of view of pedestrians at night, and preferably, like the pedestrian traffic light 111, may be installed on the opposite sidewalks of the crosswalk 100 to be switched on and off independently. The light transmitting lamp 112 is operated to interwork with the streetlight or the pedestrian traffic light or is operated through an operation of a separate dimming control switch.
The smart traffic light 113 may perform a function of generating walking signal information related to the safety of the pedestrian by learning an operation of the pedestrian traffic light 111, and providing the generated walking signal information to the mobile terminal 120 of the pedestrian. The smart traffic light 113 may periodically transmit a beacon signal including walking signal information. Then, the walking signal information may include standby residual time information and walking residual time information.
The smart traffic light 113 may detect a pedestrian who approaches the smart traffic light system 110. The smart traffic light 113 may transmit a control signal for cancelling a vehicle priority signal to the traffic signal controller 140 when detecting a pedestrian. A pedestrian may download an application (hereinafter, referred to as 'a pedestrian protection application') for protecting a pedestrian who enters into the crosswalk from App Store or Play Store and may install the application in the mobile terminal 120. Meanwhile, as another embodiment, the mobile terminal 120 may receive a pedestrian protection application from an external server, another terminal, a storage medium, or the like and may install the pedestrian protection application in the mobile terminal 120.
The mobile terminal 120 may execute the installed pedestrian protection application as the background according to a user command or the like.
Meanwhile, as another embodiment, the mobile terminal 120 may automatically execute the installed pedestrian protection application when receiving a beacon signal.
The mobile terminal 120 may perform a function of recognizing a location of the pedestrian on the basis of beacon signals received from one or more smart traffic lights 113 when the corresponding application is executed, and automatically generating a notification signal corresponding to the current location of the pedestrian and providing the generated notification signal to the corresponding pedestrian. Then, the notification signal may be output in at least one form of a visual signal, an audible 5 signal, and a haptic signal.
Meanwhile, although not illustrated in the drawings, the mobile tertninal 120 may provide location information included in a beacon signal or device identification information (that is, device ID information) to a predetermined web server.
The web server may recognize a location of the pedestrian on the basis of the location

10 information of the smart traffic light 113 or the device identification information, and may provide a notification service related to the safety of the pedestrian to the mobile terminal 120. The mobile terminal 120 may provide notification information, sound information, and location based information (for example, public institute information, map information, geography infortnation, and the like), which has been received from the corresponding web server, to the pedestrian.
The mobile terminal 120 described in the specification may include a portable phone, a smart phone, a laptop computer, a digital broadcasting teiminal, a PDA
(personal digital assistant), a PMP (portable multimedia player), a navigation slate PC, a tablet PC, an ultra-book, and a wearable device, for example, a smart watch, smart glasses, and a head-mounted display.
The sidewalk 130 is a road shared by vehicles and pedestrians. In order to provide a smooth use opportunity between pedestrians and vehicles, the crosswalk 130 is operated according to a predetermined signal system. One or more sidewalks may be provided according to the kinds of the roads. For example, in the case of a three-way intersection or a four-way intersection, a plurality of crosswalks may be installed on the road. Further, the plurality of crosswalks may be classified into linear crosswalks having a line shape, and diagonal crosswalks having a diagonal shape.

11 A bottom traffic light may be installed in the crosswalk 130. The bottom traffic light may be operated to interwork with a beacon signal transmitted from the smart traffic light 113.
The traffic signal controller 140 is a device which is installed on an intersection and/or a crosswalk and functions to collect and parse an occupation time and optimally manage a traffic light. The traffic signal controller 140 may be electrically connected to a vehicle traffic light and a pedestrian traffic light and functions to control flickering operation of the vehicle traffic light and the pedestrian traffic light.
FIG. 2 is a block diagram illustrating a configuration of a mobile terminal according to an embodiment of the present invention.
Referring to FIG. 2, the mobile terminal 200 may include a wireless communication unit 210, an output unit 220, an input unit 230, a memory 240, and a control unit 250. The elements illustrated in FIG. 2 are not essential for realizing a mobile terminal, and the mobile terminal described in the specification may have elements, the number of which is larger or smaller than the enumerated elements.
The wireless communication unit 210 may include a mobile communication module, a short range communication module, and a wireless interne module.
The mobile communication module transmits and receives a wireless signal to and from at least one of a base station an external terminal, and a server in a mobile communication network established according to technical standards or communication schemes (for example, GSM (Global System for Mobile communication), CDMA
(Code Division Multi Access), CDMA2000 (Code Division Multi Access 2000), EV-DO (Enhanced Voice-Data Optimized or Enhanced Voice-Data Only), WCDMA
(Wideband CDMA), HSDPA (High Speed Downlink Packet Access), HSUPA (High Speed Uplink Packet Access), LTE (Long Term Evolution), LIE-A (Long Term Evolution-Advanced) and the like)for mobile communication.
Then, the short range communication module is for short range communication, and may support short range communication by using at least one of BluetoothTM, RFID
(radio frequency identification ), IrDA (infrared data association), UWB
(ultra

12 wideband), ZigBee, NFC (near field communication), Wi-Fi (wireless-fidelity), Wi-Fi Direct, wireless USB (universal serial bus) technologies.
The wireless internet module refers to a module for wireless internet connection, and may be installed inside or outside the mobile terminal 200.
The wireless interne module is configured to transmit and receive a wireless single in a communication network according to the wireless interne technologies. The wireless interne technology, for example, includes WLAN (Wireless LAN), Wi-Fi (Wireless-Fidelity), Wi-Fi (Wireless Fidelity) Direct, DLNA (Digital Living Network Alliance), WiBro (Wireless Broadband), WiMAX (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access), HSUPA (High Speed Uplink Packet Access), LTE (Long Term Evolution), LTE-A (Long Term Evolution-Advanced), and the like, and the wireless interne module transmits and receives data according to at least one wireless internet technology in a range including the internet technologies which have not be enumerated.
The output unit 220 is adapted to generate an output related to visual, audible, and haptic feelings, and may include at least one of a display unit, a sound output unit, a haptic module, and an optical output unit.
The display unit displays (outputs) information processed by the mobile terminal 200. For example, the display unit may display information of an application program driven by the mobile terminal 200 or UI (User Interface) or GUI
(Graphic User interface) information according to the execution screen information. Further, the display unit may have a mutual layer structure with a touch sensor or be integrally formed with the touch sensor to realize a touch screen.
The sound output unit may output audio data received from the wireless communication unit 210 or stored in the memory 240 in a call signal reception mode, a voice communication mode, a recording mode, a voice recognition mode, a broadcasting reception mode, and the like. The sound output unit may output a voice signal related to a function (for example, a call signal reception sound, a message reception sound, or the like) performed by the mobile terminal 200.

13 The haptic module generates various haptic effects which may be felt by a user. A representative example of the haptic effect generated by the haptic module may be vibration. An intensity, a pattern, and the like of the vibration generated by the haptic module may be controlled through selection of the user or setting of the control unit.
The optical output unit outputs a signal for informing generation of an event by using a light source of the mobile terminal 200. An example of the event generated by the mobile terminal 200 may include reception of a message, reception of a call signal, making a missed call, an alarm, notification of a schedule, reception of an e-mail, reception of infolination through an application, and the like.
The input unit 230 may include a camera or an image input unit for inputting an image signal, a microphone or an audio input unit for inputting an audio signal, and a user input unit (for example, a touch key or a push key (mechanical key)) for receiving information from the user.
The memory 240 stores data which supports various functions of the mobile terminal 200. The memory 240 may store a plurality of application programs driven by the mobile tetininal 200, and data and instructions for an operation of the mobile terminal 200. In the embodiment, the memory 240 may store a pedestrian protection application.
The control unit 250 controls an operation related to the pedestrian protection application stored in the memory 240, and a general overall operation of the mobile terminal 200. Moreover, the control unit 250 may perform a control by combining at least one of the elements described above to realize various embodiments described above in the mobile terminal 200 according to the present invention.
FIG. 3 is a block diagram illustrating a configuration of a smart traffic light system according to an embodiment of the present invention.
Referring to FIG. 3, the smart traffic light system 300 may include a smart traffic light (310), a pedestrian traffic light 320, and a light transmitting lamp 330. The smart traffic light 310 may include a beacon module 311, a walking signal learning

14 module 312, a pedestrian monitoring module 313, an illumination sensor 314, a deviation time determining unit 315, a display unit 316, a memory 317, and a control unit 318. The smart traffic light 310 may be installed outside the smart traffic light system 300 or integrally formed with the walking traffic light 320 or the light transmitting lamp 330 to constitute one module.
The elements illustrated in FIG. 3 are not essential for realizing a smart traffic light system 300, and the smart traffic light system described in the specification may have elements, the number of which is larger or smaller than the enumerated elements.
The beacon module 311 may function to periodically transmit a beacon signal including walking signal information, vary an output to three or more outputs (strong, middle, and weak) and alternately transmit the outputs, guide a visually handicapped person at a remote site, and receive the three or more outputs if reaching a destination to inform that the present site is the destination. The beacon module 311 may include a short range communication module for transmitting a beacon signal.
Then, the short range communication module is for short range communication, and may support short range communication by using at least one of BluetoothTM, RFID
(radio frequency identification ), IrDA (infrared data association), UWB
(ultra wideband), ZigBee, NFC (near field communication), Wi-Fi (wireless-fidelity), Wi-Fi Direct, wireless USB (universal serial bus) technologies. Hereinafter, in the embodiment, a Bluetooth communication module may be used as the short range communication module, and the present invention is not limited thereto.
The Bluetooth communication module provides a communication interface for supporting Bluetooth communication. The Bluetooth communication used in the corresponding module is one of short range wireless communication technologies, and may support data communication between terminals which are present in a radius of 0 to 10 m or 0 to 100 m. In particular, it is preferable that the Bluetooth communication module mounted on the smart traffic light 310 according to the embodiment uses a version of Bluetooth 4.0 or more, on which a low energy technology and a location measuring technology are mounted. The walking signal learning module 312 may perform a function of learning an operation of the walking traffic light 320 in a learning mode.
That is, the walking signal learning module 312 may periodically collect infoimation on an operation time (that is, a stop time) of a red lamp and infounation on 5 an operation time (that is, a walking time) of a green lamp (that is, a walking time) from the walking traffic light 320 or the traffic signal controller in a learning mode.
If the operation time information of the red lamp having the same value (or a value within a predetermined error range) is collected by a preset number of times, the walking signal learning module 312 may set (learn) the operation time information having the same vale as normal operation time information of the red lamp and may store the set (learned) operation time information in the memory 317.
Further, if the operation time information of the green lamp having the same value (or a value within a predetermined error range) is collected by a preset number of times, the walking signal learning module 312 may set (learn) the operation time

15 information having the same vale as normal operation time information of the green lamp and may store the set (learned) operation time information in the memory 317.
Meanwhile, when the operation cycle of the walking traffic light 320 is changed according to an operation of the traffic signal controller, the walking signal learning module 312 may delete the operation time information of the walking traffic light 320 stored in the memory 317 in advance and learn the changed operation state of the walking traffic light 320 again.
The pedestrian detecting module 313 may perform a function of detecting a pedestrian who approaches the smart traffic light system 300 to cancel a vehicle priority signal set in the traffic signal controller.
The beacon module 311 may periodically transmit a beacon signal including information 439 for requesting transmission of a response signal when the vehicle priority signal is set. The pedestrian detecting module 313 may detect a pedestrian on the basis of whether a response signal corresponding to the beacon signal has been received. For example, when receiving a response signal corresponding to the beacon

16 signal from the mobile terminal of the pedestrian, the pedestrian detecting module 313 may detect that the pedestrian is present around the smart traffic light system 300.
The beacon module 311 may periodically transmit a beacon signal including information 439 for requesting stop of transmission of a response signal when the pedestrian is detected. This is for preventing a plurality of response signals from being continuously received by the pedestrian detecting module 313 and causing propagation interference, after the pedestrian is detected. The control unit 318 may transmit a control signal for cancelling a vehicle priority signal to the traffic signal controller when the pedestrian is detected.
The illumination sensor 314 may perform a function of measuring an intensity of surrounding illumination of the smart traffic light system 300. The control unit 318 may perform a dimming control of the walking traffic light 320 on the basis of the illumination information measured by the illumination sensor 314.
The deviation time determining unit 315 may detelmine a deviation time (or an error time) for synchronizing an operation cycle of the pedestrian traffic light and a transmission cycle of the beacon signal.
That is, when the green walking traffic light is operated, the correction time detennining unit 315 may determine a first deviation time corresponding to a time difference between an operation initiating time point of the green pedestrian traffic light and a transmission time point of the beacon signal. Further, when the red stop traffic light is operated, the correction time deteimining unit 315 may detelmine a second deviation time corresponding to a time difference between an operation initiating time point of the red pedestrian traffic light and a transmission time point of the beacon signal.
For example, as illustrated in FIG. 4B, the operation cycle (C) of the pedestrian traffic light is a sum of a green walking time (A) and a red stop time (B).
The response time (a mutual operation delay time) of the pedestrian traffic light should satisfy 70 ms or less which is a traffic light standard of the worldwide roads.

17 Meanwhile, the maximum transmission cycle of the beacon signal is 100 ms. It is difficult to synchronize the operation cycle of the walking traffic light and the transmission cycle of the beacon signal. Accordingly, the mobile terminal which periodically receives the beacon signal cannot acquire accurate operation time information of the walking traffic light. In order to solve the problem, it is necessary to insert the deviation time information into the beacon signal, as well as the operation time information of the walking traffic light, and provide the beacon signal to the mobile terminal.
During an operation of the green walking traffic light, the mobile terminal may correct operation time information of the green walking traffic light by using a first deviation time (D). That is, the mobile terminal may correct the operation time information of the green walking traffic light by subtracting the first deviation time (D) from the operation time (A) of the green walking traffic light.
During an operation of the red stop traffic light, the mobile terminal receives the contents of FIG. 4A. The presence 439 of a response may include other information, and the deviation information includes information for identifying a walking green color or a walking red color and state information of a transmission output. In the initial signal reception state of the user terminal, the smart traffic light receives a signal which has been transmitted with a transmission output of "strong" and then informs that a traffic light is present on the front side, and infoims a forward glance according to reception of a "middle" signal and informs arrival at the vicinity of the traffic light according to reception of a "weak" signal in the case of movement for a predetermined time period. The notification method is set by the user such that notification may be made through voice, a text, or vibration, and when the notification is set to voice, the mobile terminal may also function as a sound traffic indicator of a visually handicapped person by allowing the visually handicapped person to hear external sound by using a microphone of the mobile terminal or an external microphone. In addition, the synchronization of time is made by using an internal timer of the mobile terminal mainly with reference to the initially received infoimation, and the current time may be

18 completed if no communication is made for a predetermined time period or another beacon is connected, synchronization may be started if another green (walking) signal is made, and synchronization may be completed if no communication is made for a predetermined time period or another beacon is connected.
The time deviation correction technology should satisfy a deviation even when information is transmitted by optimizing a propagation occupation time and making the number and cycle of communications longer to optimize a communication disorder due to a propagation disorder according to an increase of the number of wirelessly interworking devices and is a technology that may synchronize the currently operated signal light even one connection. The deviation time is synchronized with the beacon transmission cycle by accumulating times changed with reference to the operation cycle of the walking or stop traffic light and the times are accumulated until the signal changes.
The display unit 316 displays (outputs) information processed by the smart traffic light 310. As an example, the display unit 316 may display walking residual time information.
The memory 317 stores data which supports various functions of the smart traffic light 310. The memory 317 may store a plurality of application programs driven by the smart traffic light 310, and data and instructions for an operation of the smart traffic light 310.
The control unit 318 controls an operation related to the application program stored in the memory 317, and a general overall operation of the smart traffic light 310.
Moreover, the control unit 318 may perform a control by combining at least one of the elements described above to realize various embodiments described above in the smart traffic light 310 according to the present invention.
When the learning mode is completed, the control unit 318 may calculate standby residual time infoimation and walking residual time infoimation on the basis of operation time information of the walking traffic light 320 stored in the memory 317.
Here, the standby residual time infoimation is information on a residual time until the

19 walking traffic light 320 is changed from a red lamp to a green lamp, and the walking residual time infoimation is information on a residual time until the walking traffic light 320 is changed from a green lamp to a red lamp.
The control unit 318 may generate a beacon signal 400 as illustrated in FIG.
4A, and may periodically transmit the beacon signal 400 to the mobile terminals of the pedestrians. The beacon signal 400 may include a preamble field 410, an access address field 420, a payload field 430, and a CRC field 440.
The preamble field 410 is a field that has the size of one byte (that is, 8 bits) and is used to adjust synchronization of bits or synchronization of frames in the signal receiving device. The access address field 420 is a field that has the size of four bytes (that is, 32 bits) and is used for connection addresses in a link layer. The CRC field 440 is a field that has the size of 3 bytes (that is, 24 bits) and is used to detect a transmission error of the frame.
The payload field 430 has the size of 2 to 60 bytes, and may include device ID
infoonation 431, location data 432, first distance data 433, second distance data 434, third distance data 435, standby residual time infoimation 436, walking residual time infoonation 437, deviation time information 438, and response presence information 439.
The device ID information 431 is identification location of the first smart traffic light, and the location data (or P data 432) is location information of the first smart traffic light. The first distance data (or D1 data 433) is infoonation on a distance from the first smart traffic light to a safety line of the second smart traffic light located on the opposite side of the linear crosswalk, the second distance data (or D2 data 434) is information on a distance from the first smart traffic light to a safety line of the third smart traffic light located on the opposite side of the diagonal crosswalk, and the third distance data (or D3 data 435) is infoimation on an intermediate distance from the first smart traffic light to the fourth smart traffic light that is immediately adjacent to the first smart traffic light. Since the location of the smart traffic light is fixed, the location data 432, the first distance data 433, the second distance data 434, and the third distance data 435 have fixed values.
The standby residual time information 436 is information on a residual time until the walking traffic light is changed from a red lamp to a green lamp, and the 5 walking residual time infoimation 437 is information on a residual time until the walking traffic light is changed from a green lamp to a red lamp.
The deviation time information 438 is infolmation on a deviation time for synchronizing the operation cycle of the walking traffic light and the transmission cycle of the beacon signal. The deviation time infoimation 438 may include first deviation 10 time information related to an operation time of the green waking traffic light, and second deviation time information related to an operation time of the red stop traffic light.
The response presence infoimation 439 may include information on whether a response signal corresponding to a beacon signal has been transmitted. That is, the 15 response presence information 439 may include information for requesting transmission of a response signal corresponding to a beacon signal, and information for requesting stop of transmission of the response signal corresponding to the beacon signal.
The walking traffic light 320 may include a switching unit which switches on and off the red lamp, the green lamp, and a power source applied to the red lamp or the

20 green lamp. The walking traffic light 320 alternately operates the red lamp and the green lamp at a predetermined time cycle by controlling the switching unit according to a control command of the traffic signal controller. Further, the walking traffic light 320 may further include a separate switch for dimming control.
The light transmitting lamp 330 may perform a function of outputting light toward the crosswalk 130 to secure the fields of view of pedestrians at night.
Further, the light transmitting lamp 330 may change the intensity of illumination of light radiated toward the crosswalk 130 according to a control command of the control unit 314. Then, the light transmitting lamp 330 may be operated while interworking with the walking traffic light. For example, when the walking traffic light

21 is a red lamp, energy may be saved by decreasing the intensity of illumination (the amount of light) of the light transmitting lamp 330, and when the walking traffic light is a green lamp, the field of view of a pedestrian may be secured by increasing the intensity of illumination (the amount of light) of the light transmitting lamp 330.
FIG. 5 is a flowchart which is referenced for describing an operation of a smart traffic light according to an embodiment of the present invention.
Referring to FIG. 5, when a learning mode event is generated (S510), the control unit 314 may set the operation mode of the smart traffic light 310 to a pedestrian signal learning mode (S520). Then, the learning mode event may be an event in which the operation cycle of the pedestrian traffic light 320 is changed according to an operation of the traffic signal controller.
When a learning mode event is generated, the control unit 314 may delete operation time information of the walking traffic light 320 stored in the memory 313 in advance, and may learn the changed operation state of the walking traffic light 320 again.
In a pedestrian signal learning mode, the control unit 314 may periodically collect information on an operation time of the red lamp and information on an operation time of the green lamp from the walking traffic light 320 or the traffic signal controller and may perform learning (S530).
If the operation time information of the red lamp having the same value (or a value within a predetermined error range) is collected by a preset number of times, the control unit 314 may set (learn) the operation time information having the same value as normal operation time information of the red lamp through the walking signal learning unit 312, and may store the set (learned) operation time information in the memory 313 (S540).
Further, of the operation time information of the green lamp having the same value (or a value within a predetermined error range) is collected by a preset number of times, the control unit 314 may set (learn) the operation time information having the same value as normal operation time information of the green lamp through the walking

22 signal learning unit 312, and may store the set (learned) operation time information in the memory 313 (S550).
When the pedestrian signal learning mode is completed, the control unit 314 may calculate standby residual time information and walking residual time information on the basis of operation time information (that is, learning data) of the walking traffic light 320 stored in the memory 317 (S550).
The control unit 314 may generate a beacon signal 400 including standby residual time information 436 and walking residual time information 437 (S560). In addition to the information 436 and 437, the beacon signal 400 may further include at least one of device ID infoimation 431, location data 432, first distance data 433, second distance data 434, third distance data 435, deviation time information 438, and response presence information 439. Further, the beacon signal may further include geography information on a public institute or a government office located around the crosswalk.
The control unit 314 may transmit the beacon signal 400 to the mobile terminal of the pedestrian (S570). Then, the beacon signal may be periodically broadcast.
FIG. 6 is a flowchart which is referenced for describing an operation of a mobile terminal according to an embodiment of the present invention.
Referring to FIG. 6, the control unit 250 may execute an application (that is, a pedestrian protection application) for protecting a pedestrian who enters into a crosswalk according to a command of the user (S610).
The control unit 250 may execute the corresponding application as the background without having to separately display the operation screen of the corresponding application on a display unit.
The control unit 250 may periodically receive a plurality of beacon signals from a plurality of smart traffic lights located around the crosswalk (S620). Then, each of the beacon signals may include device ID infoimation 431, location data 432, first distance data 433, second distance data 434, third distance data 435, standby residual time

23 infoimation 436, walking residual time infoimation 437, deviation time information 438, and response presence infoimation 439.
The control unit 250 may use only a necessary beacon signal, among the plurality of beacon signals. Further, the control unit 250 may use only necessary data among a plurality of data included in the beacon signals.
The control unit 250 may select a beacon signal having the largest RSSI
(Received Signal Strength Indication) from the plurality of beacon signals, and may parse the information included in the corresponding signal (S630). This is for selecting a beacon signal transmitted from the smart traffic light 310 installed in the crosswalk, which a pedestrian is to cross, and parsing the beacon signal. Since the distance between the smart traffic light installed in the crosswalk, which the pedestrian is to cross, and the mobile terminal of the pedestrian is shortest when several crosswalks are present, the strength of the beacon signal transmitted from the corresponding smart traffic light 310 is highest.
The control unit 250 may determine whether a response signal corresponding to the corresponding beacon signal has been transmitted, on the basis of the response presence information 439 included in the beacon signal. Here, the response signal may be used to allow the smart traffic light 310 to detect a pedestrian.
Further, the control unit 250 may measure infolination on the distance between the mobile terminal 200 of the pedestrian and the plurality of smart traffic lights 310, on the basis of the plurality of beacon signals received periodically (S640).
Then, the information on the distance between the mobile terminal 200 and the smart traffic light 310 may be calculated through Equation 1, and the present invention is not necessarily limited thereto.
[Equation 1]
cl==.10.^.((TxPower.--RSSI)./.(10n)y Here, TxPower is transmission power of the beacon signal, and RSSI is a received signal strength indication.

24 The control unit 250 may detect information on a relative location between pedestrians by using the information on the distances calculated through Equation 1 (S650). Then, the control unit 250 may detect relative location information of the pedestrian by using a well-known location detection algorithm.
Meanwhile, it is exemplified in the embodiment that the above-described step S630 is performed prior to the step S640, the present invention is not limited thereto, and it is apparent that the step S630 may be carried out after the step S650.
The control unit 250 may generates a notification signal corresponding to a location of the pedestrian and may output the generated notification signal (S660 and S670). Then, the notification signal may be output in at least one form of an audible signal, a visual signal, and a haptic signal. The notification signals corresponding to the location of the pedestrian will be described in detail with reference to FIGS.
7A to 7C.
FIGS. 7A to 7C are views illustrating an example of a road on which first to fourth crosswalks are installed. Referring to FIGS. 7A to 7C, a first smart traffic light (Al) 711 and a second smart traffic light (D1) 712 are disposed on opposite sidewalks of the first crosswalk 710, a third smart traffic light (A2) 721 and a fourth smart traffic light (B2) 722 are disposed on opposite sidewalks of the second crosswalk 720, a fifth smart traffic light (B1) 731 and a sixth smart traffic light (Cl) 732 are disposed on opposite sidewalks of the third crosswalk 730, and a seventh smart traffic light (C2) 741 and an eighth smart traffic light (D2) 742 are disposed on opposite sidewalks of the fourth crosswalk 740.
The mobile terminal 200 may determine which of zone A 750, zone B 760, zone C 770, and zone D 780 the pedestrian is located in, on the basis of the intensities of the beacon signals transmitted from the first to eight smart traffic lights 711, 712, 721, 722, 731, 732, 741, and 742. The mobile terminal 200 may output a notification signal corresponding to the current location of the pedestrian.
As an example, as illustrated in FIG. 7A, when the pedestrian 790 is located in zone A 750 and the walking traffic light is a red lamp, the control unit 250 of the mobile teiminal 200 may output a first notification signal including information on a walking standby time of the first crosswalk 710 on the basis of the beacon signal of the first smart traffic light (Al) 711.
Further, the control unit 250 may output a second notification signal including information on a walking standby time of the second crosswalk 720 on the basis of the 5 beacon signal of the third smart traffic light (A2) 721.
Meanwhile, when the pedestrian 790 is located in zone A 750 and the walking traffic light is a green lamp, the control unit 250 may output a third notification signal including information on a walking residual time of the first crosswalk 710 on the basis of the beacon signal of the first smart traffic light (Al) 711.
10 Further, the control unit 250 may output a fourth notification signal including information on a walking residual time of the second crosswalk 720 on the basis of the beacon signal of the third smart traffic light (A2) 721.
Accordingly, the pedestrian 790 may predict operations of the first smart traffic light (Al) 711 and the third smart traffic light (A2) 721 on the basis of the first to fourth 15 notification signals output from the mobile terminal 200.
As another embodiment, as illustrated in FIG. 7B, when the pedestrian 790 stands by in front of the first crosswalk 710, the control unit 250 of the mobile terminal 100 may periodically detect location information of the pedestrian 790 by using the beacon signal of the first smart traffic light (Al) 711 and the beacon signal of the 20 second smart traffic light (D1) 712.
The control unit 250 may output a notification signal on trespassing of a safety line on the basis of first distance data (that is, a distance from the first smart traffic light to the safety line o fthe second smart traffic light) included in the beacon signal of the first smart traffic light (Al) 711 and the location information of the pedestrian. That is,

25 when a distance between the pedestrian 790 and the second smart traffic light (D1) 712 is smaller than the value of the first distance data, the control unit 250 may output a notification signal that warns that the pedestrian 790 trespasses on the safety line of the first crosswalk 710.

26 Further, the control unit 250 may output a notification signal including infoimation on a walking standby time of the first crosswalk 710 on the basis of the beacon signal of the first smart traffic light (Al) 711.
As another embodiment, as illustrated in FIG. 7C, when the pedestrian 790 moves from zone A 750 to zone D 780 through the first crosswalk 710, the control unit 250 of the mobile terminal 200 may periodically detect location information and a movement speed of the pedestrian 790 by using the beacon signal of the first smart traffic light (Al) 711 and the beacon signal of the second smart traffic light (D1) 712.
The control unit 250 may calculate a residual spending time on the basis of the movement speed of the pedestrian and the left distance of the first crosswalk 710, and may compare the calculated residual spending time and the walking residual time included in the beacon signal of the first or second smart traffic light 711 and 712.
When the calculated residual spending time is greater than the walking residual time, the control unit 250 may output a notification signal which warns that the left walking residual time is little.
Similarly, when the pedestrian 790 is located in any one of zone B 750 and zone D 780, the control unit 250 may output notification signals corresponding to the location of the pedestrian by using the above-mentioned methods.
Referring to FIG. 6 again, the control unit 250 may generate a control signal for interworking a safety facility device installed around the crosswalk and transmit the generated control signal to the corresponding device (S680). That is, the control unit 250 may output a predetermined notification signal and control the safety facility device for safety of the pedestrian. Then, the safety facility device includes a glance guide light, a preliminary traffic light, a bottom traffic light, a light transmitting lamp, a camera that monitors violation of a lane of a crosswalk, and a storage device that stores a captured image.
For example, when the pedestrian illegally crosses the crosswalk while neglecting the crosswalk signal, the control unit 250 may not only warn the pedestrian

27 of the jaywalking by flickering the light transmitting lamp at a predetermined period and but also improve a perception rate of the vehicle driver on the jaywalking.
The control unit 250 may repeat the operations of the step S610 to the step S680 until the pedestrian protection application is completed (S690).
Meanwhile, it will be apparent to those skilled in the art that the technical spirits applied to the pedestrian protection system may be applied to a vehicle.
FIG. 8 is a block diagram illustrating a configuration of a vehicle according to an embodiment of the present invention.
Referring to FIG. 8, the vehicle 800 may include a communication unit 810, an input unit 820, a sensing unit 830, an output unit 840, a vehicle driving unit 850, a memory 860, an interface unit 870, a control unit 880, and a power source unit 890.
The communication unit 810 may include one or more modules that allow wireless communication between the vehicle 800 and the mobile terminal, between the vehicle 800 and a wearable device, between the vehicle 800 and an external server, or between the vehicle 800 and another vehicle. The communication unit 810 may include a broadcasting module 811, a wireless interne module 812, a short range communication module 813, and a location information module 814.
The broadcasting receiving module 811 receives a broadcasting signal or information related to broadcasting from an external broadcasting management server through a broadcasting channel.
The wireless interne module 812 refers to a module for wireless interne connection, and may be installed inside or outside the vehicle 800. The wireless interne module 812 is configured to transmit and receive a wireless single in a communication network according to the wireless internet technologies.
Then, the short range communication module 813 is for short range communication, and may support short range communication by using at least one of BluetoothTM, RFID (radio frequency identification), IrDA (infrared data association), UWB (ultra wideband), ZigBee, NFC (near field communication), Wi-Fi (wireless-fidelity), Wi-Fi Direct, wireless USB (universal serial bus) technologies.

28 The location information module 814 is a module for acquiring a location of the vehicle 800, and a representative example of the location information module 814 includes a GPS module. The GPS module may acquire a location of the vehicle 800 by using a signal sent by a GPS satellite.
The input unit 820 may include a driving operating unit 821, a camera 822, a microphone 823, and a user input unit 824. The driving operating unit 821 receives a user input for driving the vehicle 800. The camera 822 may process a still image or a video obtained by an image sensor (for example, a CMOS or a CCD).
The microphone 823 may process an external sound signal with electrical data.
The processed data may be variously utilized according to a function, which is being performed by the vehicle 800. The user input unit 824 is adapted to receive information from the user. If infoimation is input through the user input unit 824, the control unit 880 may control an operation of the vehicle 800 in correspondence to the input information.
The sensing unit 830 senses a signal related to driving of the vehicle 800. To achieve this, the sensing unit 830 may include the sensing unit 830 may include a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight detection sensor, a heading sensor, a yaw sensor, a gyro sensor, a position module, a vehicle forward/rearward movement sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor by rotation of a steering wheel, a vehicle interior temperature sensor, a vehicle interior humidity sensor, an ultrasonic wave sensor, a radar, and a lidar.
The output unit 840 is adapted to output information processed by the control unit 880, and may include a display unit 841, a sound output unit 842, and a haptic output unit 843.
The display unit 841 may display infounation processed by the control unit 880. For example, the display unit 841 may display vehicle related information. Here, the vehicle related information may include vehicle control information for directly controlling the vehicle or vehicle driving assisting information for guiding driving of the vehicle driver.

29 The sound output unit 842 converts an electric signal from the control unit 880 to an audio signal and outputs the audio signal. To achieve this, the sound output unit 842 may include a speaker. The haptic output unit 843 generates a haptic output. For example, the haptic output unit 843 may be operated such that the user may recognize an output, by vibrating a steering wheel, a safety belt, and a seat.
The vehicle driving unit 850 may control operations of various devices of the vehicle. The vehicle driving unit 850 may include a power source driving unit 851, a steering driving unit 852, a brake driving unit 853, a lamp driving unit 854, and an air conditioning driving unit 855.
The power source driving unit 851 may perform an electronic control of a power source in the vehicle 800. The steering driving unit 852 may perform an electronic control of a steering apparatus in the vehicle 800. Accordingly, the progress direction of the vehicle may be changed.
The brake driving unit 853 may perform an electronic control on a brake apparatus in the vehicle 800. For example, the speed of the vehicle 800 may be reduced by controlling an operation of the brake disposed in wheels.
The lamp driving unit 854 may control turning on/off operations of lamps disposed inside and outside the vehicle. Further, the intensity and direction of light of the lamps may be controlled. The air conditioning driving unit 855 may perform an electronic control of an air conditioner in the vehicle 800.
The memory 860 is electrically connected to the control unit 880. The memory 860 may store basic data on the units, control data for controlling operations of the units, and data which is input and output. In the embodiment, the memory 860 may store a pedestrian protection application.
The interface unit 870 may function as a passage with various kinds of external devices connected to the vehicle 800. For example, the interface unit 870 may include a port that may be connected to the mobile terminal or the wearable device, and may be connected to the mobile terminal or the wearable device through the port.

The control unit 880 may control overall operations of the units in the vehicle 800. Further, the control unit 880 may control an operation related to the pedestrian protection application stored in the memory 860. Here, the control unit 880 may be named an ECU (Electronic Control Unit).

According to hardware implementations, the control unit 880 may be implemented by using at least one of ASICs (application specific integrated circuits), DSPs (digital signal processors), DSPDs (digital signal processing devices), PLDs (programmable logic devices), FPGAs (field programmable gate arrays), processors, controllers, micro-controllers, microprocessors, and an electrical unit for performing 10 other functions.
The power source unit 890 may supply electric power, which is necessary for operations of the elements, according to a control of the control unit 880. In particular, the power source unit 890 may receive electric power from a battery in the interior of the vehicle or the like.
15 FIG.
9 is a flowchart which is referenced for describing an operation of a vehicle according to an embodiment of the present invention.
Referring to FIG. 9, the control unit 880 may execute an application (that is, a pedestrian protection application) for protecting a pedestrian who enters into a crosswalk according to a command of the user (S910).
20 The control unit 880 may execute the corresponding application as the background without having to separately display the operation screen of the corresponding application on a display unit 841.
The control unit 880 may periodically receive a plurality of beacon signals from a plurality of smart traffic lights located around the crosswalk (S920). Then, each of the beacon signals may include device ID infolination 431, location data 432, first distance data 433, second distance data 434, third distance data 435, standby residual time information 436, and walking residual time information 437,.

The control unit 880 may use only a necessary beacon signal, among the plurality of beacon signals. Further, the control unit 880 may use only necessary data among a plurality of data included in the beacon signals.
The control unit 880 may select a beacon signal having the largest RSSI
(Received Signal Strength Indication) from the plurality of beacon signals, and may parse the information included in the corresponding signal (S930). This is for selecting a beacon signal transmitted from the closest smart traffic light 310 located in the progress direction of the vehicle 800 and parsing the selected beacon signal.
Further, the control unit 880 may measure information on the distance between the vehicle 800 and the plurality of smart traffic lights 310, on the basis of the plurality of beacon signals received periodically (S940). Then, the information on the distance between the vehicle 800 and the smart traffic light 310 may be calculated through Equation 1.
The control unit 880 may detect relative location information of the vehicle by using infoimation on the distances between the vehicle 800 and the smart traffic lights 310 (S950). Then, the control unit 880 may detect relative location information of the vehicle 800 by using a well-known location detection algorithm.
The control unit 880 may generates a notification signal corresponding to a location of the vehicle 800 and may output the generated notification signal (S960 and S970). Then, the notification signal may be output in at least one form of an audible signal, a visual signal, and a haptic signal.
For example, when the vehicle 800 enters into a predetermined distance from the crosswalk in spite that the walking traffic light is a green lamp, the control unit 880 may output a notification signal for warning the vehicle driver. Further, when the vehicle 800 enters into a predetermined distance from the crosswalk in spite that the vehicle traffic light is a red lamp, the control unit 880 may output a notification signal for warning the vehicle driver.
Further, when the vehicle 800 enters into the crosswalk in spite that the walking traffic light is a green lamp, the control unit 880 may output a warning signal and make emergency braking on the vehicle 800 at the same time. Similarly, when the vehicle 800 enters into the crosswalk in spite that the vehicle traffic light is a red lamp, the control unit 880 may output a warning signal and make emergency braking on the vehicle 800 at the same time.
The control unit 880 may repeat the operations of the step S910 to the step S970 until the pedestrian protection application is completed (S980).
Meanwhile, as another embodiment, the control unit 880 may output a notification signal while interworking with the mobile terminal of the pedestrian, a safety facility device installed around the crosswalk, and the like as well as the smart traffic light.
The present invention may be realized in a medium, in which a program is recorded, with a code that may be read by a computer. The medium that may be read by a computer includes all kinds of recording devices, in which data that may be read by a computer system is stored. An example of a medium that may be read by a computer includes an HDD (Hard Disk Drive), an SSD (Solid State Disk), an SDD (Silicon Disk Drive), a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and also includes those realized in the form of a carrier wave (for example, transmission through the internet). Further, the computer may include the control unit 180 of the terminal. Accordingly, the detailed description should not be construed as being limited in all aspects and should be considered to be exemplary. The scope of the present invention has to be determined through reasonable interpretation of the claims and all the changes in the equivalent ranges of the present invention also fall within the scope of the present invention.

Claims

[CLAIMS]

[Claim 1]
A smart traffic light comprising:
a beacon output module configured to periodically transmit a beacon signal, and vary a transmission output to three or more (Example 1: 1.0 dbm, 5 dbm, and 10 dbm) (Example 2: strong/middle/weak) and transmit information;
a walking signal learning module configured to learn an operation of a walking traffic light;
a memory configured to store data learned through the walking signal learning module; and a control unit configured to calculate standby residual time information and walking residual time information based on the learning data stored in the memory, and guide a visually handicapped person to a traffic light by providing and transmitting one or more pieces of information, except for traffic light data including at least one of the calculated standby residual time information and the calculated walking residual time information and learned by varying a transmission output of a beacon such that a location of the beacon is guided and an arrival of the beacon is notified.
[Claim 2]
The smart traffic light of claim 1, wherein the beacon signal further includes at least one of identification information of the smart traffic light, location data of the smart traffic light, data on a distance between the smart traffic light and an adjacent smart traffic light, deviation time information for synchronizing an operation cycle of the walking traffic light and an operation cycle of the beacon signal, and information on whether a response signal corresponding to the beacon signal has been transmitted.
[Claim 3]
The smart traffic light of claim 1, wherein the walking signal learning module collects information on an operation time of a red lamp and an operation time of a green lamp from the walking traffic light and a traffic signal controller, and learns the collected information.
[Claim 4]
The smart traffic light of claim 1, wherein when an operation cycle of the walking traffic light is changed, the walking signal learning module deletes the learned data stored in the memory, and learns a changed operation state of the walking traffic light again.
[Claim 5]
The smart traffic light of claim 1, further comprising:
a pedestrian detecting module configured to detect a pedestrian who approaches the walking traffic light on the basis of whether a response signal corresponding to the beacon signal is received.
[Claim 6]
The smart traffic light of claim 5, wherein when the pedestrian is detected, the control unit transmits a control signal for cancelling a vehicle priority signal to a traffic signal controller.
[Claim 7]
The smart traffic light of claim 1, further comprising:
a deviation time determining unit configured to determine a deviation time for synchronizing an operation cycle of the walking traffic light and a transmission cycle of the beacon signal.
[Claim 8]
The smart traffic light of claim 7, wherein the deviation time determining unit determines a first deviation time corresponding to a time difference between an operation initiating time point of a green walking traffic light and a transmission time point of the beacon signal during an operation of the green walking traffic light, and determines a second deviation time corresponding to a time difference between an operation initiating time point of a red walking stop traffic light and a transmission time point of the beacon signal when a red stop signal light is operated.
[Claim 9]
The smart traffic light of claim 1, further comprising:
a display unit configured to display the walking residual time information of the walking traffic light.
[Claim 10]
A mobile terminal comprising:
a wireless communication unit configured to receive a plurality of beacon signals from a plurality of smart traffic lights located around a crosswalk;
a control unit configured to calculate information on distances between a pedestrian and a plurality of smart traffic lights by using the beacon signals, detect information on the relative locations of the pedestrian on the basis of the calculated information on the distances, and generate a notification signal corresponding to a location of the pedestrian; and an output unit configured to output a notification signal generated by the control unit.
[Claim 11]
The mobile terminal of claim 10, wherein the control unit selects a beacon signal having the highest received signal strength indication (RSSI), and parsing information included in the selected beacon signal.
[Claim 12]
The mobile terminal of claim 10, wherein the control unit outputs a first notification signal including information on a standby residual time of the pedestrian when the pedestrian is located in an adjacent sidewalk area of the crosswalk, and outputs a second notification signal which warns that the pedestrian trespasses on a safety line of the crosswalk when the pedestrian trespasses on the safety line of the crosswalk.
[Claim 13]
The mobile terminal of claim 10, wherein the control unit calculates a residual spending time on the basis of a movement speed of the pedestrian and a left distance of the crosswalk when the pedestrian moves on the crosswalk, and outputs a notification signal that warns that a change of a signal of the walking traffic light is coming near when a walking residual time included in a specific beacon signal is smaller than the calculated residual spending time.
[Claim 14]
A vehicle comprising:
a wireless communication unit configured to receive a plurality of beacon signals from a plurality of smart traffic lights located around a crosswalk;
a control unit configured to calculate information on distances between the vehicle and a plurality of smart traffic lights by using the beacon signals, detect information on the relative locations of the vehicle on the basis of the calculated information on the distances, and generate a notification signal corresponding to a location of the vehicle; and an output unit configured to output a notification signal generated by the control unit.