KR20070091756A - The group system and method used ubiquitous sensor networks - Google Patents

Abstract

A gathering system using a ubiquitous sensor network and a method thereof are provided to enable a small number of leaders to efficiently manage a large number of participants. A master terminal consists of an RF antenna(201), an RF signal strength measurer(202), an RF controller(203), a broadcasting switch(204), a power part(205), an external input port(206), an environment information sensor(207), a speaker/vibration module(208), a display part(209), an LED(210), a memory(211), an alarm unit(212), and an MCU(212). The RF antenna(201) transmits and receives RF signals. The RF signal strength measurer(202) measures the strength of a received RF signal to judge whether a slave terminal is within a management domain. The RF controller(203) is provided to gradually adjust the strength of RF signals. The broadcasting switch(204) is used for changeover from single hop communication to multi-hop communication when a slave terminal gets out of the management domain. The power part(205) supplies power to the master terminal. The external input port(206) is used to upgrade software of the master terminal and to input information about managed objects. The environment information sensor(207) detects the present environmental state. The speaker/vibration module(208) generates a sound or vibration when a slave terminal gets out of the management domain. The display part(209) displays detailed information about the present system. The LED(210) displays a power state. The memory(211) stores the software and operating system of the master terminal and information about slave terminals. The alarm unit(212) raises an alarm to a slave terminal. The MCU(212) controls an external device.

Description

Group System and Method Using Ubiquitous Sensor Networks {The Group System and Method Used Ubiquitous Sensor Networks}

In the case of all the end devices in the management area

2, if there is a terminal that deviates within the maximum communication distance of the main terminal in the system,

FIG. 3 when the terminal is separated from the maximum communication distance of the main terminal in the group system, FIG.

4 is a hardware configuration diagram of the main terminal,

5 is a hardware configuration diagram of the terminal device,

6 operation method of the main terminal,

7 operation method of the terminal,

8 emergency call signal receiving method

The present invention relates to a group system and a method using a sensor network, by measuring the signal strength of the radio frequency between the autonomous network and the sensor node of the sensor network, to determine whether the object to be managed is in a certain area, An apparatus, a system, and a method for determining a location where a location is located.

Conventional systems use a signal strength of the radio frequency to notify the alarm when separated by more than a certain distance, when the distance is far away is very limited to identify the relative position of the managed object. Although there are many escape prevention systems at present, it can be applied to two or three family units or a small group of about 15 people. However, there are limitations in large groups. In the case of amusement parks, grand parks, national parks, museums, large shopping malls, department stores, etc. Are occurring, and about 2,500 cases of missing children occur annually.

In addition, when a leader (travel guide, parent, kindergarten, elementary school, junior high school, high school, special school teacher, etc.) manages group travel, there are many management targets, but real-time management is impossible. Due to the lack of a real-time management system, a traveler frequently loses a traveler while traveling, and a traveler has difficulty managing a traveler.

Therefore, the current system is capable of managing a small number of people, but there are a lot of problems in reality when the management target is increased.

The present invention relates to a group system and a method using the ubiquitous sensor network, in order to solve the above problems, the leader (travel guide, parents, kindergarten, elementary school, middle school, high school, special school teachers, etc.) small and large management The object of the present invention is to provide a realistic device and a method for easily managing the object.

Another object of the present invention is to present the ubiquitous sensor network, which is emerging around the world, by providing a field for preventing the need of the general public and requesting help in case of an emergency during travel. Its purpose is to contribute to development.

In order to achieve the above technical problem, the present invention comprises an end terminal and a main terminal, and the terminal terminal transmits data to the main terminal without passing through other terminals to determine a unique identifier of the terminal terminal initially set in the display window of the main terminal. It determines the count of the terminal to be managed in the currently set area and displays the abnormality on the main terminal.If a defector occurs, the main terminal alarm is sounded and the terminal number and the person who left the terminal The location of the last communication point is displayed by the sensor network's location recognition method. The terminal device is equipped with wireless communication function, analysis function, unique identifier, switch to inform emergency situation, status indicator lamp of current battery, speaker and vibration module to inform administrator's warning, and to autonomous communication method of ubiquitous sensor network. Configure the communication network. The main terminal has a radio communication function, an analysis function, a memory for recording a unique identifier and the personal information of the managed person, a switch for calling the terminal, a current battery status indicator lamp of the terminal, and a range of areas to be managed to manage the terminal. Radio frequency signal strength control switch for controlling the, the display unit for indicating the position of the terminal, the speaker for recognizing the emergency situation, the switch for switching the routing scheme.

The present invention can actively track the location of the terminal to be managed in connection with sensor networks that exist everywhere by actively reflecting the ubiquitous meaning. Under normal circumstances, two groups A and B exist in the same place, but there is no problem even if the two groups are in the same place because the main terminal determines and detects the received signal based on the identifier sent by the terminal. However, if the end of group A has deviated, the main terminal alerts the head of group A, displays the last point of communication on the display, recognizes the emergency situation, and switches single hop routing to multi-hop routing. Broadcasts to the terminal terminals and resets them to multi-hop routing method, and if the multi-hop routing method is executed, the location of the terminal terminal can be tracked in real time by expanding the surveillance area. If the main terminal is not found even after this, the emergency switch is automatically turned on, and the terminal finds the main terminal while increasing the wireless signal strength. In this case, if the exiting terminal does not find the main terminal, the emergency signal is called to the network of the nearest group B to inform the leader of the group B that the terminal is separated. Since the terminal displays basic information (personal information of the defector, telephone number of the leader, etc.), the terminated terminal has the characteristic of returning to the group A leader.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the present invention.

1 is a block diagram of a group system using a ubiquitous sensor network. The main terminal 100 and the terminal 130 is one-hop communication. The main terminal receives the RF signal of the terminal and measures the intensity of the radio wave to determine whether the main terminal is in the area managed by the terminal and displays it on the display of the main terminal. 100 indicates a communication area set by the main terminal, and 110 indicates an extended state of the management area when the main terminal maximizes the communication distance. In FIG. 1, two groups are simultaneously using the group system, and all terminal devices exist in the main terminal management area of each group. Even if two or more groups exist in the same place, there is no problem in communication because each terminal has a unique identifier.

2 shows a case where one terminal terminal of the group A is out of the management area set by the main terminal. In this case, the main terminal determines that it cannot receive the RF signal of the terminal and amplifies the RF signal of the main terminal in stages. The terminal also amplifies the RF signal automatically because it cannot see the signal from the main terminal. When the main terminal and the terminal receives the RF signal within the maximum communication distance, the main terminal may introduce the terminal into the management area.

3 is a case where the terminal A group is separated by more than the maximum communication distance of the main terminal. In this case, even if the RF signal of the main terminal and the terminal is amplified to the maximum, they cannot communicate with each other. In this case, the terminator sends an emergency signal to request rescue. When an emergency signal is received by a specific main terminal, the information of the terminated terminal may be grasped to provide information to the main terminal of the A group, and the terminated terminal may be introduced into the management area of the A group. If the terminal of group B receives the emergency signal, the terminal receives the emergency signal to the main terminal to which it belongs, so as to grasp the information of the terminal that has escaped, and enter into the management area of group A. .

4 is a system configuration diagram of the main terminal. RF antenna 201 to transmit and receive the RF signal, RF signal strength meter 202 to determine whether it is in the management area by measuring the strength of the received RF signal, RF controller 203 to adjust the signal strength step by step RF signal When the terminal leaves the management area, the broadcasting switch 204 for switching from single hop communication to multi-hop communication, the power supply unit 205 for supplying power to the terminal, and software upgrade and management target information can be input to the main terminal. External input terminal 206, environmental information sensor 207 to detect the current environmental status, speaker / vibration module 208 that informs the end of the management area of the terminal and the presence of power supply and hardware abnormality, details of the current system The display unit 209 can be confirmed, the power status display LED 210 to display the power status, the memory to store the OS and terminal information of the software and the terminal (211), warning the terminal It consists of the alarm device 212, and the MCU 212 can control the external apparatus group.

5 is a system configuration diagram of an end terminal. RF antenna 301 for RF communication, RF controller 302 for controlling the signal strength of the antenna, power supply 303 to supply power, emergency switch 304 to transmit a rescue request signal in the event of an out of management area or an emergency situation, Power status display LED (306) to display the power status of the terminal, the alarm speaker / vibration module (307) to receive an alarm of the main terminal or warns when leaving the management area, a storage device (308) to store software and basic information, It is composed of the MPU 305 to control the terminal device.

6 is an operation method of the main terminal when the terminal is within the maximum communication range. The master terminal establishes the initial management area, turns on the power, receives an RF signal from the terminal, and determines whether all terminals in the current area exist. After receiving signals from all terminal devices, a method for determining whether the terminal is within the management area of the terminal device is executed in the same manner as in FIG. 6. Receiving an RF signal from the terminal, it is determined whether the strength of the RF signal is equal to the set strength of the RF signal, and then determine whether the departure. If the RF signal strength is the same, the method of 402 to 404 is repeated. However, if the RF signal strength is different or deviated, the main terminal checks whether the terminal deviates (404), and confirms the final departure time and point (405). Broadcasting 406 sends a command to all terminators to change communication from single hop to multi-hop and to maximize the RF signal 408, and reroutes. The maximum communication power and the multi-hop configuration can increase the current management area to increase the probability of communicating with displaced end devices. If you maximize the multi-hop and RF outputs, you can comprehensively search a fairly large area to determine the location of the distal terminator. When the departure location check (411), the inflow into the management area (412), and switch to the first RF output and single-hop communication method 413, the main terminal checks the existence of all the terminal, at (402) Repeat the method until 404. If the multi-hop communication and the transceiver is the maximum output, but the terminal does not find the terminal provides information to the control center (410). The control center collects the information of the terminal terminal and transmits the information to the sensor network of the separated region, and the main terminal of the separated region generates an alarm to search for the existence of the terminal terminal. At the same time, complaints can be filed with the police station to search for terminal devices that have been dismissed at the same time.

7 is a method of operation of the terminal. The end terminal turns on the power (501) to inform the main terminal of its existence and form a communication network. The terminal detects the RF signal of the main terminal, determines that it is in the management area, and periodically checks the communication network. By repeating the process of (502) to (504), it is periodically confirmed that it is in the management area. However, at the moment of detecting the departure, the alarm sound and vibration module of the terminal terminal informs the departure. If the terminal receiving the warning signal flows into the management area, it repeats from 502 to 504. However, if the terminal does not detect the RF signal because it completely leaves the management area, the terminal increases the RF signal step by step (505) to search for the main terminal, and when the main terminal is searched, it enters the management area (511) and at (502). Repeat until 504. If the RF signal is increased step by step but the main terminal cannot be detected, the emergency mode is broadcasted by switching to the emergency mode. As a result of the broadcasting, when the neighboring main terminal or the terminal receives the emergency call code 508, the detached terminal is introduced into the neighboring communication network. When the adjacent main terminal receives the emergency call code directly, the basic information of the discontinued terminal is checked on the display unit, and immediately called to the manager to check the position of the discontinued terminal and flow into the management area. When the neighboring terminal receives the emergency call code, the emergency call code may be transmitted to the neighboring main terminal, and the terminal that has escaped based on the received information may be introduced into the belonging main terminal management area.

8 is a method for receiving an emergency call code. When the emergency call code is received (603) in the RF signal reception standby state, it is determined whether the emergency signal is displayed, and in the case of an emergency signal, the personal information of the discontinued terminal which called the emergency signal and the information of the belonging main terminal are shown on the display unit. Receiving the terminal may perform an emergency communication to the main terminal manager of the leaving terminal can take over the leaving terminal.

The present invention relates to a group system using the ubiquitous sensor network and a method thereof, wherein the group system configured and operated as described above is effective for managing a large number of participants (terminals) by a small number of leaders (terminals). In certain places such as amusement parks, grand parks, department stores, national parks, and large shopping malls, a certain management area is established to manage immature children, the elderly, and foreign tourists, and the display and warning signs of main terminals Vibration module can be used to identify defectors at an early stage, and if a defector occurs, the defector can be introduced into the management area by controlling RF signals of the main and terminal devices. In addition, if the defector is not found at the maximum communication distance, it can be reported early by providing information to the control center, and it is easy to search for the defector by using the adjacent sensor network, and it can be introduced into the management area early.

Claims (5)

The main terminal, end terminal, main terminal, and terminal terminal that are located in areas where there is a high probability of departure, such as amusement parks, national parks, large shopping malls, department stores, etc. The communication method, the method of measuring the strength of the RF signal between the main terminal and the terminal to maintain a constant distance, the method of searching for the disconnected terminal and entering the management area, and the main terminal cannot find Group system using the ubiquitous sensor network including the way in which the terminating terminal is separated from the area into the management area of the managing main terminal and the rescue request is made to the adjacent main terminal and the terminating terminal by using the emergency call code of the terminating terminal. And the method. The alarm switch and method of claim 1, wherein the main terminal prevents the departure of the management area by using an alarm switch in a manner for preventing the departure of the management area of the terminal. The method of claim 1, further comprising: a method of indicating a final position and time of the terminal that leaves the management region of the main terminal, and a step of amplifying the RF signal of the main terminal in order to confirm the position of the terminal that has escaped; An exiting terminal automatically amplifies the RF signal to find the main terminal. The terminal of claim 1, wherein when the terminal leaving the management area of the main terminal escapes to an area that cannot be found even by amplifying the RF signal of the main terminal to the maximum, the terminal transmits information of the terminal that has left the control center. The way. The method of claim 1, wherein when the main terminal and the discontinued terminal are in an area where they cannot communicate with each other, the discontinued terminal transmits an emergency call code to make an emergency call to an adjacent main terminal and the terminal, and A method in which location information is provided to a management main terminal of an end terminal that has received a call from an adjacent main terminal.

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