KR101571736B1 - Power saving method of anchor device in indoor positioning system - Google Patents

Abstract

The present invention relates to a power saving method of an anchor device in an indoor positioning system, and it is an object of the present invention to provide a power saving method of an anchor device in which, when an active mode is set and a second wakeup signal is transmitted to another anchor device, The second wake-up signal is transmitted at a different time point, and a specific packet indicating that the first wake-up signal and the second wake-up signal are transmitted is transmitted to another anchor device, and the other anchor device The first and second wake-up signals can not be transmitted for a predetermined time, so that the wake-up signal transmission between the anchor devices can be efficiently performed, and the power saving effect can be recognized.

Description

[0001] The present invention relates to a power saving method of an anchor device in an indoor positioning system,

The present invention relates to a power saving method of an anchor device, and more particularly, to a method of reducing power of an anchor device in an indoor positioning system.

The Indoor Positioning System (IPS) consists of an IPS anchor device, which is a reference point for positioning when viewed from the device configuration, and an IPS mobile device, which is the target to be positioned. The conventional anchor device of IPS has developed into a situation where the power is always supplied and is not prepared for the consumed electric power, which is inadequate to operate as a battery.

The beacon device serving as the positioning reference point in the method using the received signal strength, such as the IPS method using Bluetooth low energy (BLE), can reduce the consumed power considerably by simultaneously transmitting the same information to a plurality of places, In a commercial district such as a department store, a shop, etc., the same information is sent at a plurality of places at the same time periodically even in a closed state, and the battery is wasted, shortening the battery service life.

The IPS method using UWB (Ultrawide band) uses the propagation time. Due to the characteristics of the UWB communication technology, power consumption is high in the standby state. In order to measure the propagation time, even if the same information is simultaneously transmitted to a plurality of places in a unidirectional manner, there is a problem in that there is a receiving standby state because the anchors need to transmit and receive for clock synchronization.

In order to solve the power consumption problem of the anchor device, the present invention proposes an anchor device which can activate and deactivate an anchor device using ultrasonic waves or infrared rays having a small standby power level, And to provide a reduction method.

According to an embodiment of the present invention, when a new sleep signal is received from an external device within a first threshold time, it is checked whether a sleep signal is re-received by adjusting a timer, and an anchor device is mistakenly activated And an electric power saving method of an anchor device capable of preventing an electric power from being supplied to the anchor device.

In another embodiment of the present invention, a first wake-up signal and a second wake-up signal, which is a second wake-up signal, are transmitted as a pair to a peripheral anchor device so that the peripheral anchor device inadvertently activates Which is capable of preventing power consumption of the anchor device.

Another aspect of the present invention is to provide a power saving method of an anchor device that can prevent a collision between a first wake-up signal and a second wake-up signal by changing a signal transmission start time between anchor devices, .

In an exemplary embodiment of the present invention, during a second threshold time for checking the activation mode state determination, it is checked whether a specific packet is received indicating that it is the subject of transmission of the first and second wakeup signals to transmit an unnecessary wakeup signal And an object of the present invention is to provide a power saving method of an anchor device capable of preventing an anchor device.

According to an aspect of the present invention, an anchor device power saving method includes: receiving a wake up signal from an external device in a sleep mode; Entering the active mode in response to the received wake-up signal; Transmitting the received wake-up signal to at least one external anchor device; After receiving a new wake-up signal from the external device, performing a normal operation independent of the received wake-up signal; Receiving a sleep signal from the external device in an active mode; Transmitting the received sleep signal to at least one external anchor device; And checking whether the sleep signal is re-received during a first threshold time for entering the sleep state.

A power saving method of an anchor device is a power saving method of an anchor device in an indoor positioning system, comprising: receiving a wake up signal from an external device in a sleep mode; Entering the active mode in response to the received wake-up signal; Transmitting the wake-up signal to at least one external anchor device; After receiving the wake-up signal from the external device, performing a normal operation independent of the received wake-up signal; Receiving a sleep signal from the external device in an active mode; Transmitting the received sleep signal to at least one external anchor device; And if there is no sleep signal that has been re-entered, entering the sleep mode again.

A power saving method of an anchor device according to another aspect of the present invention includes: receiving a first wake-up signal from an external device in a sleep mode; Entering the active mode in response to the received first wake-up signal; When receiving from the external apparatus a second wake-up signal that is a pair of the first wake-up signal, transmits itself the first and second wake-up signals during a second threshold time for checking the activation mode state confirmation Checking whether a specific packet is received or not; Transmitting a new specific packet to the external anchor device if the specific packet is not received during the second threshold time; Transmitting the first wake-up signal to the external anchor device; Transmitting the second wake-up signal to the external anchor device; And after the transmission, receiving at least one of the first wake-up signal and the second wake-up signal from the external device, and performing the normal operation independently of this.

According to another aspect of the present invention, in an indoor positioning system, an anchor device includes a communication module for transmitting and receiving data with at least one of at least one external anchor device and at least one external device; And a second wake-up signal, which is a pair of the first wake-up signal and a second wake-up signal, in a sleep mode, and receives a first wake-up signal from an external device in response to the received first wake- The control unit checks whether or not a specific packet indicating that it is a subject to transmit the first and second wake-up signals is checked for a second threshold time for checking the activation mode state determination, Transmits the set first wake-up signal to the external anchor device, and transmits the set second wake-up signal to the external anchor device And transmits, after the transmission, at least one of the first wake-up signal and the second wake-up signal from the external device When a controller for the normal operation in this independent.

According to the embodiment of the present invention, the consumed electric power of the anchor device can be reduced by using ultrasonic waves or infrared rays having a small standby power consumption.

According to an embodiment of the present invention, when a new sleep signal is received from an external device within a first threshold time, a timer is adjusted to check whether a sleep signal is re-received, and an anchor device It can be prevented from being activated.

According to an embodiment of the present invention, since the first wake-up signal and the second wake-up signal coding the first wake-up signal are transmitted to the peripheral anchor device in pairs, the peripheral anchor device is inadvertently activated State can be prevented.

According to another embodiment of the present invention, it is possible to prevent a collision between the first wake-up signal and the second wake-up signal by changing the starting point of signal transmission between the anchor devices.

According to an embodiment of the present invention, during a second threshold time for checking the activation mode state determination, it is checked whether or not a specific packet is received indicating that it is the subject of transmitting the first and second wakeup signals, Transmission can be prevented.

1 is a diagram showing an example of a control system according to the present invention.
2 is a diagram showing another example of the control system according to the present invention.
3 is a diagram illustrating an example of a mobile terminal according to the present invention.
4 is a view showing another example of a mobile terminal according to the present invention.
5 is a flowchart showing a power saving method of an anchor device in an indoor positioning system according to an embodiment of the present invention.
6 is a flowchart illustrating a power saving method of an anchor device in an indoor positioning system according to an embodiment of the present invention.
7 is a block diagram illustrating an anchor device in an indoor positioning system according to an embodiment of the present invention.
8 is a flowchart illustrating a power saving method of a mobile device and an anchor device in an indoor positioning system in an environment similar to a home in accordance with an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

1 is a diagram showing an example of a control system according to the present invention.

As shown in FIG. 1, the control system of the present invention may include a mobile terminal 10, a plurality of reference devices 30, and one or more electronic devices 50. Here, the mobile terminal 10 measures its position through wireless communication with the reference devices 30, detects the direction of the mobile terminal 10 toward the electronic device 50, And the electronic device 50 are measured. The mobile terminal 10 can measure the position of the electronic device 50 using its position and direction and the distance between the electronic device 50 and the electronic device 50. The mobile terminal 10 can also generate and store a map indicating the location of the electronic devices 50 based on the measured location and use it to select and control the desired electronic device 50 .

The mobile terminal 10 described in the present specification can be used as a portable terminal such as a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP) slate PCs, tablet PCs, ultrabooks, wearable devices such as smartwatches, smart glass, HMDs (head mounted displays)), And may be configured in any one of a remote control mode and a remote control mode.

The reference devices 30 are devices used to measure the position of the mobile terminal 10 or the electronic device 50. At least three or more of the reference devices 30 are disposed at different positions in order to measure positions in a triangulation manner . For example, at least three reference devices 30 are required to measure the plane (2D) position of the mobile terminal 10 or the electronic device 50, and the mobile terminal 10 or the electronic device 50, At least four reference devices 30 are required to measure the spatial position (3D) When the reference devices 30 are used to measure the position of the mobile terminal 10 in the room, the reference devices 30 are preferably located indoors, but the position of the reference devices 30 is not limited to this, It is also possible.

The electronic device 50 may be a home electronic device such as a TV, a computer, a refrigerator, a washing machine, an air conditioner, a lighting device, or the like, as well as other mobile terminals capable of moving and communicating. In particular, when the electronic device 50 has an Indoor Positioning System (IPS) function, it may measure its position through communication with the reference devices 30. [

2 is a diagram showing another example of the control system according to the present invention.

2, the control system of the present invention may include a mobile terminal 10, a plurality of reference devices 30, one or more electronic devices 50, and a server 70. Here, the mobile terminal 10 measures its position through wireless communication with the reference devices 30, detects the direction of the mobile terminal 10 toward the electronic device 50, Is measured. The mobile terminal 10 can measure the position of the electronic device 50 using its position and direction and the distance between the electronic device 50 and the electronic device 50. The mobile terminal 10 may also generate a map indicating the location of the electronic devices 50 based on the measured location and may use it to select and control the desired electronic device 50.

The reference devices 30 are devices used to measure the position of the mobile terminal 10 or the electronic device 50. At least three or more of the reference devices 30 are disposed at different positions in order to measure positions in a triangulation manner . When the reference devices 30 are used to measure the position of the mobile terminal 10 in the room, the reference devices 30 are preferably located indoors, but the position of the reference devices 30 is not limited to this, It is also possible.

The electronic device 50 may be a home electronic device such as a TV, a computer, a refrigerator, a washing machine, an air conditioner, a lighting device, or the like, as well as other mobile terminals capable of moving and communicating. In particular, when the electronic device 50 has an Indoor Positioning System (IPS) function, it may measure its position through communication with the reference devices 30. [

The server 70 can measure the position of the electronic device 50 using the position and direction of the mobile terminal 10 and the distance between the mobile terminal 10 and the electronic device 50. [ In addition, the server 70 may generate and store a map indicating the location of the electronic devices 50 based on the measured location, and may use the map to map the desired electronic device 50 can be selected and controlled. Here, the server 70 may constitute a home gateway or a cloud (CLOUD), but it is not limited thereto and may mean a communicating arithmetic / storage device.

3 is a diagram illustrating an example of a mobile terminal according to the present invention.

3, the mobile terminal 10 includes a communication unit 11, an input unit 12, a sensing unit 14, a display unit 15, a memory 17, and a control unit 18 do. The components shown in FIG. 3 are not essential for implementing the mobile terminal 10, so that the mobile terminal described herein may have more or fewer components than those listed above.

The communication unit 11 may include at least one of a wireless Internet module, a local area communication module, and a location information module.

Here, the wireless Internet module refers to a module for wireless Internet access, and may be built in or externally attached to the mobile terminal 10. The wireless Internet module is configured to transmit and receive wireless signals in a communication network according to wireless Internet technologies. Wireless Internet technologies include, for example, wireless LAN (WLAN), wireless fidelity (Wi-Fi), wireless fidelity (Wi-Fi) Direct, DLNA (Digital Living Network Alliance), WiBro Interoperability for Microwave Access, High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Long Term Evolution (LTE), and Long Term Evolution-Advanced (LTE-A) And transmits and receives data according to at least one wireless Internet technology in a range including internet technologies not listed above.

The short-range communication module is for short range communication, and includes Bluetooth (registered trademark), Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, Communication, Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, and Wireless USB (Wireless Universal Serial Bus) technology. The short distance communication module may be provided between the mobile terminal 10 and the reference devices 30 or between the mobile terminal 10 and the electromagnetic device 50 or between the mobile terminal 10 and the mobile terminal 10 through a wireless local area network And the network where the server 70 is located. The short-range wireless communication network may be a short-range wireless personal area network. In particular, the mobile terminal 10 can determine its own position through communication with the reference devices 30 using the local communication module.

The location information module is a module for obtaining the location (or current location) of the mobile terminal 10, and representative examples thereof include a Global Positioning System (GPS) module or a Wireless Fidelity (WiFi) module. For example, the mobile terminal 10 can acquire the position of the mobile terminal 10 by using a signal sent from the GPS satellite by using the GPS module. As another example, when the mobile terminal 10 utilizes a Wi-Fi module, the mobile terminal 10 can acquire the position of the mobile terminal 10 based on information of a wireless access point (AP) Can be obtained. If necessary, the location information module may replace or additionally perform the function of any one of the other modules of the communication unit 11 to obtain data relating to the location of the mobile terminal.

The input unit 12 may include a user input unit for receiving information from a user, for example, a touch key, a mechanical key, and the like.

The sensing unit 14 may include one or more sensors for sensing at least one of information in the mobile terminal 10, surrounding environment information surrounding the mobile terminal, and user information. For example, the sensing unit 14 may be an acceleration sensor, a magnetic sensor, a G-sensor, a gyroscope sensor, a motion sensor, an infrared sensor An infrared sensor, an ultrasonic sensor, and an optical sensor. At least one of the acceleration sensor, the magnetic sensor, the gravity sensor, the gyroscope sensor and the motion sensor may be oriented in the direction (azimuth, inclination, elevation) of the mobile terminal 10, And at least one of the infrared sensor, the ultrasonic sensor and the optical sensor may be used for measuring the distance between the mobile terminal 10 and the electronic device 50. [ For example, the ultrasonic sensor senses ultrasonic waves reflected from the electronic device 50 and returns to the controller 18, and the controller 18 can calculate the distance to the wave generating source (electronic device) through the sensed ultrasonic waves. The distance of the wave generating source can be calculated using the time difference between the output ultrasonic wave and the reflected ultrasonic wave.

The display unit 15 may implement a touch screen. Such a touch screen may function as a user input 12 that provides an input interface between the mobile terminal 10 and a user and may provide an output interface between the mobile terminal 10 and the user. In addition, the display unit 15 displays (outputs) the information processed by the mobile terminal 10. For example, the display unit 15 may display execution screen information of an application program driven by the mobile terminal 10, or UI (User Interface) and GUI (Graphic User Interface) information according to the execution screen information .

The memory 17 stores a plurality of application programs (application programs or applications) driven by the mobile terminal 10, data and instructions for the operation of the mobile terminal 10, (ID) of the electronic device, and a map including the location information and the identification information of the one or more electronic devices 50. [ The memory 17 may be a flash memory type, a hard disk type, a solid state disk type, an SDD type (Silicon Disk Drive type), a multimedia card type micro type, card type memory (e.g., SD or XD memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (PROM), programmable read-only memory (PROM), magnetic memory, magnetic disk, and optical disk.

The control unit 18 typically controls the overall operation of the mobile terminal 10. The control unit 18 may process or process signals, data, information, and the like input or output through the above-mentioned components, or may drive an application program stored in the memory 17 to provide or process appropriate information or functions to the user. In addition, the control unit 18 may control at least some of the components in order to drive an application program stored in the memory 17. [ Furthermore, the control unit 18 may operate at least two or more of the components included in the mobile terminal 10 in combination with each other for driving the application program.

The control unit 18 determines the position of the mobile terminal 10 measured through communication between the communication unit 11 and the reference devices 30 and the position of the mobile terminal 10 measured by the sensing unit 14 The distance between the mobile terminal 10 and the electronic device 50 is used to measure the actual position of the electronic device 50. [ The control unit 18 may provide a user interface for setting a maximum allowable value of the distance between the mobile terminal 10 and the electronic device 50 used for measuring the position of the electronic device 50. [

The control unit 18 can transmit the positional information of the measured electronic device 50 to the memory 17 or the server 70 together with the identification information of the electronic device 50, The map can be generated using the identification information and stored in the memory 17. [

As described above, when the user executes the position tracking application and adjusts the direction of the mobile terminal 10 after the map is generated, the control unit 18 determines whether the direction of the mobile terminal 10 to be controlled is the measurement of the electronic device 50 It is determined whether or not it is facing the position. For this, the controller 18 determines whether the mobile terminal 10 is pointing to the position of the electronic device 50 registered in the map in consideration of the current position and the current direction of the mobile terminal 10. If the direction of the mobile terminal 10 faces the position of the electronic device 50, the control unit 18 can select and control the electronic device 50.

When the user inputs a touch input (e.g., a drag) to the display unit 15 so that the user faces the measured position of the electronic device 50, The user can select and control the electronic device 50 in consideration of the current position and the direction of the touch input.

The control unit 18 may display on the display unit 15 the identification information of one or more electronic devices 50 located on a virtual straight line that coincides with the direction of the mobile terminal 10 or the direction of the touch input . At this time, the control unit 18 may arrange the identification information on the display unit 15 in order according to the distance between the mobile terminal 10 and the corresponding electronic device 50. [ The user can easily select the desired electronic device 50 by using the identification information thus displayed. The control unit 18 may also provide a display unit 15 with a user interface for setting a virtual straight line length.

4 is a block diagram illustrating another example of a mobile terminal according to the present invention. The components of the mobile terminal 10 of FIG. 3 described above are also included in the mobile terminal 100 of FIG. 4, and the functions of the components are the same.

The mobile terminal 100 includes a wireless communication unit 110, an input unit 120, a sensing unit 140, an output unit 150, an interface unit 160, a memory 170, a control unit 180, ), And the like. The components shown in FIG. 4 are not essential for implementing the mobile terminal 100, so that the mobile terminal 100 described herein can have more or fewer components than the components listed above have.

The wireless communication unit 110 may be connected between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and another mobile terminal 100 or between the mobile terminal 100 and the external server 100. [ Lt; RTI ID = 0.0 > wireless < / RTI > In addition, the wireless communication unit 110 may include one or more modules for connecting the mobile terminal 100 to one or more networks.

The wireless communication unit 110 may include at least one of a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short distance communication module 114, and a location information module 115 .

The input unit 120 includes a camera 121 or an image input unit for inputting a video signal, a microphone 122 for inputting an audio signal, an audio input unit, a user input unit 123 for receiving information from a user A touch key, a mechanical key, and the like). The voice data or image data collected by the input unit 120 may be analyzed and processed by a user's control command.

The sensing unit 140 may include at least one sensor for sensing at least one of information in the mobile terminal, surrounding environment information surrounding the mobile terminal, and user information. For example, the sensing unit 140 may include a proximity sensor 141, an illumination sensor 142, a touch sensor, an acceleration sensor, a magnetic sensor, A G-sensor, a gyroscope sensor, a motion sensor, an RGB sensor, an infrared sensor, a finger scan sensor, an ultrasonic sensor, An optical sensor (e.g., a camera 121, a microphone 122, a battery gage, an environmental sensor (e.g., a barometer, a hygrometer, a thermometer, (E.g., a sensor, a gas sensor, etc.), a chemical sensor (e.g., an electronic nose, a healthcare sensor, a biometric sensor, etc.) Lt; RTI ID = 0.0 > Combined can be used.

The output unit 150 includes at least one of a display unit 151, an acoustic output unit 152, a haptic tip module 153, and a light output unit 154 to generate an output related to visual, auditory, can do. The display unit 151 may have a mutual layer structure with the touch sensor or may be integrally formed to realize a touch screen. The touch screen may function as a user input unit 123 that provides an input interface between the mobile terminal 100 and a user and may provide an output interface between the mobile terminal 100 and a user.

The interface unit 160 serves as a path to various types of external devices connected to the mobile terminal 100. The interface unit 160 is connected to a device having a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, And may include at least one of a port, an audio I / O port, a video I / O port, and an earphone port. In the mobile terminal 100, corresponding to the connection of the external device to the interface unit 160, it is possible to perform appropriate control related to the connected external device.

The memory 170 may store a plurality of application programs or applications running on the mobile terminal 100, data for operation of the mobile terminal 100, and commands. At least some of these applications may be downloaded from an external server via wireless communication. At least some of these application programs may exist on the mobile terminal 100 from the time of shipment for the basic functions of the mobile terminal 100 (e.g., call incoming, outgoing, message reception, and origination functions) . Meanwhile, the application program may be stored in the memory 170, installed on the mobile terminal 100, and may be operated by the control unit 180 to perform the operation (or function) of the mobile terminal.

In addition to the operations related to the application program, the control unit 180 typically controls the overall operation of the mobile terminal 100. The control unit 180 may process or process signals, data, information, and the like input or output through the above-mentioned components, or may drive an application program stored in the memory 170 to provide or process appropriate information or functions to the user.

In addition, the controller 180 may control at least some of the components illustrated in FIG. 4 in order to drive the application programs stored in the memory 170. FIG. In addition, the controller 180 may operate at least two of the components included in the mobile terminal 100 in combination with each other for driving the application program.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power to the components included in the mobile terminal 100. The power supply unit 190 includes a battery, which may be an internal battery or a replaceable battery.

At least some of the components may operate in cooperation with one another to implement a method of operation, control, or control of a mobile terminal according to various embodiments described below. In addition, the operation, control, or control method of the mobile terminal may be implemented on the mobile terminal by driving at least one application program stored in the memory 170. [

Hereinafter, the components listed above will be described in more detail with reference to FIG. 4 before explaining various embodiments implemented through the mobile terminal 100 as described above.

First, referring to the wireless communication unit 110, the broadcast receiving module 111 of the wireless communication unit 110 receives broadcast signals and / or broadcast-related information from an external broadcast management server through a broadcast channel. The broadcast channel may include a satellite channel and a terrestrial channel. Two or more broadcast receiving modules may be provided to the mobile terminal 100 for simultaneous broadcast reception or broadcast channel switching for at least two broadcast channels.

The mobile communication module 112 may be a mobile communication module or a mobile communication module such as a mobile communication module or a mobile communication module that uses technology standards or a communication method (e.g., Global System for Mobile communication (GSM), Code Division Multi Access (CDMA), Code Division Multi Access 2000 (Enhanced Voice-Data Optimized or Enhanced Voice-Data Only), Wideband CDMA (WCDMA), High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Long Term Evolution And an external terminal, or a server on a mobile communication network established according to a long term evolution (AR), a long term evolution (AR), or the like.

The wireless signal may include various types of data depending on a voice call signal, a video call signal or a text / multimedia message transmission / reception.

The wireless Internet module 113 is a module for wireless Internet access, and may be built in or externally attached to the mobile terminal 100. The wireless Internet module 113 is configured to transmit and receive a wireless signal in a communication network according to wireless Internet technologies.

Wireless Internet technologies include, for example, wireless LAN (WLAN), wireless fidelity (Wi-Fi), wireless fidelity (Wi-Fi) Direct, DLNA (Digital Living Network Alliance), WiBro Interoperability for Microwave Access, High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Long Term Evolution (LTE) and Long Term Evolution-Advanced (LTE-A) 113 transmit and receive data according to at least one wireless Internet technology, including Internet technologies not listed above.

The wireless Internet module 113 for performing a wireless Internet connection through the mobile communication network can be used for wireless Internet access by WiBro, HSDPA, HSUPA, GSM, CDMA, WCDMA, LTE or LTE- May be understood as a kind of the mobile communication module 112.

The short-range communication module 114 is for short-range communication, and includes Bluetooth ™, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB) (Near Field Communication), Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, and Wireless USB (Wireless Universal Serial Bus) technology. The short-range communication module 114 is connected to the mobile terminal 100 and the wireless communication system through the wireless area networks, between the mobile terminal 100 and another mobile terminal 100, or between the mobile terminal 100 ) And the other mobile terminal 100 (or the external server). The short-range wireless communication network may be a short-range wireless personal area network. In particular, the mobile terminal 100 may determine its location through communication with the reference devices 30 using the short-range communication module 114. [

Here, the other mobile terminal 100 may be a wearable device (e.g., a smartwatch, a smart glass, etc.) capable of interchanging data with the mobile terminal 100 according to the present invention (smart glass), HMD (head mounted display)). The short range communication module 114 may detect (or recognize) a wearable device capable of communicating with the mobile terminal 100 around the mobile terminal 100. [ If the detected wearable device is a device authenticated to communicate with the mobile terminal 100 according to the present invention, the control unit 180 may transmit at least a part of the data processed by the mobile terminal 100 to the short- 114 to the wearable device. Therefore, the user of the wearable device can use the data processed by the mobile terminal 100 through the wearable device. For example, according to this, when a telephone is received in the mobile terminal 100, the user performs a telephone conversation via the wearable device, or when a message is received in the mobile terminal 100, It is possible to check the message.

The position information module 115 is a module for obtaining the position (or current position) of the mobile terminal, and a representative example thereof is a Global Positioning System (GPS) module or a Wireless Fidelity (WiFi) module. For example, when the mobile terminal utilizes the GPS module, it can acquire the position of the mobile terminal by using a signal transmitted from the GPS satellite. As another example, when the mobile terminal utilizes the Wi-Fi module, it can acquire the position of the mobile terminal based on information of a wireless access point (AP) that transmits or receives the wireless signal with the Wi-Fi module. Optionally, the location information module 115 may perform any of the other functions of the wireless communication unit 110 to obtain data relating to the location of the mobile terminal, in addition or alternatively. The location information module 115 is a module used to obtain the location (or current location) of the mobile terminal, and is not limited to a module that directly calculates or obtains the location of the mobile terminal.

The input unit 120 is for inputting image information (or a signal), audio information (or a signal), or information input from a user. The input unit 120 may input image information The mobile terminal 100 may include one or a plurality of cameras 121. The camera 121 processes image frames such as still images or moving images obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame can be displayed on the display unit 151. [ A plurality of cameras 121 provided in the mobile terminal 100 may be arranged to have a matrix structure and various angles or foci may be provided to the mobile terminal 100 through the camera 121 having the matrix structure A plurality of pieces of image information can be input. In addition, the plurality of cameras 121 may be arranged in a stereo structure to acquire a left image and a right image for realizing a stereoscopic image.

The microphone 122 processes the external acoustic signal into electrical voice data. The processed voice data can be utilized variously according to a function (or a running application program) being executed in the mobile terminal 100. Meanwhile, the microphone 122 may be implemented with various noise reduction algorithms for eliminating noise generated in the process of receiving an external sound signal.

The user input unit 123 is for receiving information from a user and when the information is inputted through the user input unit 123, the control unit 180 can control the operation of the mobile terminal 100 to correspond to the input information . The user input unit 123 may include a mechanical input means (or a mechanical key such as a button located on the front, rear or side of the mobile terminal 100, a dome switch, a jog wheel, Jog switches, etc.) and touch-type input means. For example, the touch-type input means may comprise a virtual key, a soft key or a visual key displayed on the touch screen through software processing, And a touch key disposed on the touch panel. Meanwhile, the virtual key or the visual key can be displayed on a touch screen having various forms, for example, a graphic, a text, an icon, a video, As shown in FIG.

Meanwhile, the sensing unit 140 senses at least one of information in the mobile terminal, surrounding environment information surrounding the mobile terminal, and user information, and generates a corresponding sensing signal. The control unit 180 may control the driving or operation of the mobile terminal 100 or may perform data processing, function or operation related to the application program installed in the mobile terminal 100 based on the sensing signal. Representative sensors among various sensors that may be included in the sensing unit 140 will be described in more detail.

First, the proximity sensor 141 refers to a sensor that detects the presence of an object approaching a predetermined detection surface, or the presence of an object in the vicinity of the detection surface, without mechanical contact by using electromagnetic force or infrared rays. The proximity sensor 141 may be disposed in the inner area of the mobile terminal or in proximity to the touch screen, which is covered by the touch screen.

Examples of the proximity sensor 141 include a transmission type photoelectric sensor, a direct reflection type photoelectric sensor, a mirror reflection type photoelectric sensor, a high frequency oscillation type proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. In the case where the touch screen is electrostatic, the proximity sensor 141 can be configured to detect the proximity of the object with a change of the electric field along the proximity of the object having conductivity. In this case, the touch screen (or touch sensor) itself may be classified as a proximity sensor.

On the other hand, for convenience of explanation, the act of recognizing that the object is located on the touch screen in proximity with no object touching the touch screen is referred to as "proximity touch & The act of actually touching an object on the screen is called a "contact touch. &Quot; The position at which the object is closely touched on the touch screen means a position where the object corresponds to the touch screen vertically when the object is touched. The proximity sensor 141 can detect a proximity touch and a proximity touch pattern (e.g., a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, have. Meanwhile, the control unit 180 processes data (or information) corresponding to the proximity touch operation and the proximity touch pattern sensed through the proximity sensor 141 as described above, and further provides visual information corresponding to the processed data It can be output on the touch screen. Furthermore, the control unit 180 can control the mobile terminal 100 such that different operations or data (or information) are processed according to whether the touch to the same point on the touch screen is a proximity touch or a touch touch .

The touch sensor senses a touch (or touch input) applied to the touch screen (or the display unit 151) by using at least one of various touch methods such as a resistance film type, a capacitive type, an infrared type, an ultrasonic type, do.

For example, the touch sensor may be configured to convert a change in a pressure applied to a specific portion of the touch screen or a capacitance generated in a specific portion to an electrical input signal. The touch sensor may be configured to detect a position, an area, a pressure at the time of touch, a capacitance at the time of touch, and the like where a touch object touching the touch screen is touched on the touch sensor. Here, the touch object may be a finger, a touch pen, a stylus pen, a pointer, or the like as an object to which a touch is applied to the touch sensor.

Thus, when there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and transmits the corresponding data to the controller 180. Thus, the control unit 180 can know which area of the display unit 151 is touched or the like. Here, the touch controller may be a separate component from the control unit 180, and may be the control unit 180 itself.

On the other hand, the control unit 180 may perform different controls or perform the same control according to the type of the touch object, which touches the touch screen (or a touch key provided on the touch screen). Depending on the kind of the touch target object, whether to perform different controls or to perform the same control may be determined according to the current operating state of the mobile terminal 100 or an application program being executed.

On the other hand, the touch sensors and the proximity sensors discussed above can be used independently or in combination to provide a short touch (touch), a long touch, a multi touch, a drag touch ), Flick touch, pinch-in touch, pinch-out touch, swipe touch, hovering touch, and the like. Touch can be sensed.

The ultrasonic sensor can recognize the position information of the object to be sensed by using ultrasonic waves. Meanwhile, the controller 180 can calculate the position of the wave generating source through the information sensed by the optical sensor and the plurality of ultrasonic sensors. The position of the wave source can be calculated using the fact that the light is much faster than the ultrasonic wave, that is, the time when the light reaches the optical sensor is much faster than the time the ultrasonic wave reaches the ultrasonic sensor. More specifically, the position of the wave generating source can be calculated using the time difference with the time when the ultrasonic wave reaches the reference signal.

The camera 121 includes at least one of a camera sensor (for example, a CCD, a CMOS, etc.), a photo sensor (or an image sensor), and a laser sensor.

The camera 121 and the laser sensor may be combined with each other to sense a touch of the sensing object with respect to the three-dimensional stereoscopic image. The photosensor can be laminated to the display element, which is adapted to scan the movement of the object to be detected proximate to the touch screen. More specifically, the photosensor mounts photo diodes and TRs (Transistors) in a row / column and scans the contents loaded on the photosensor using an electrical signal that varies according to the amount of light applied to the photo diode. That is, the photo sensor performs coordinate calculation of the object to be sensed according to the amount of change of light, and position information of the object to be sensed can be obtained through the calculation.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, the display unit 151 may display execution screen information of an application program driven by the mobile terminal 100 or UI (User Interface) and GUI (Graphic User Interface) information according to the execution screen information .

In addition, the display unit 151 may be configured as a stereoscopic display unit for displaying a stereoscopic image. In the stereoscopic display unit, a three-dimensional display system such as a stereoscopic system (glasses system), an autostereoscopic system (no-glasses system), and a projection system (holographic system) can be applied.

The sound output unit 152 may output audio data received from the wireless communication unit 110 or stored in the memory 170 in a call signal reception mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output unit 152 also outputs sound signals related to functions (e.g., call signal reception sound, message reception sound, etc.) performed in the mobile terminal 100. [ The audio output unit 152 may include a receiver, a speaker, a buzzer, and the like.

The haptic module 153 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 153 may be vibration. The intensity and pattern of the vibration generated in the haptic module 153 can be controlled by the user's selection or setting of the control unit. For example, the haptic module 153 may synthesize and output different vibrations or sequentially output the vibrations.

In addition to the vibration, the haptic module 153 may be configured to perform various functions such as a pin arrangement vertically moving with respect to the contact skin surface, a spraying force or suction force of the air through the injection port or the suction port, a touch on the skin surface, contact with an electrode, And various tactile effects such as an effect of reproducing a cold sensation using an endothermic or exothermic element can be generated.

The haptic module 153 can transmit the tactile effect through the direct contact, and the tactile effect can be felt by the user through the muscles of the finger or arm. The haptic module 153 may include two or more haptic modules 153 according to the configuration of the mobile terminal 100.

The light output unit 154 outputs a signal for notifying the occurrence of an event using the light of the light source of the mobile terminal 100. Examples of events that occur in the mobile terminal 100 may include message reception, call signal reception, missed call, alarm, schedule notification, email reception, information reception through an application, and the like.

The signal output from the light output unit 154 is implemented as the mobile terminal emits light of a single color or a plurality of colors to the front or rear surface. The signal output may be terminated by the mobile terminal detecting the event confirmation of the user.

The interface unit 160 serves as a path for communication with all external devices connected to the mobile terminal 100. The interface unit 160 receives data from an external device or supplies power to each component in the mobile terminal 100 or transmits data in the mobile terminal 100 to an external device. For example, a port for connecting a device equipped with a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, an audio I / O port, a video I / O port, an earphone port, and the like may be included in the interface unit 160.

The identification module is a chip for storing various information for authenticating the use right of the mobile terminal 100 and includes a user identification module (UIM), a subscriber identity module (SIM) A universal subscriber identity module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the interface unit 160. [

The interface unit 160 may be a path through which power from the cradle is supplied to the mobile terminal 100 when the mobile terminal 100 is connected to an external cradle, And various command signals may be transmitted to the mobile terminal 100. The various command signals or the power source input from the cradle may be operated as a signal for recognizing that the mobile terminal 100 is correctly mounted on the cradle.

The memory 170 may store a program for the operation of the controller 180 and temporarily store input / output data (e.g., a phone book, a message, a still image, a moving picture, etc.). The memory 170 may store data related to vibration and sound of various patterns outputted when a touch is input on the touch screen.

The memory 170 may be a flash memory type, a hard disk type, a solid state disk type, an SDD type (Silicon Disk Drive type), a multimedia card micro type ), Card type memory (e.g., SD or XD memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read memory, a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, and / or an optical disk. The mobile terminal 100 may operate in association with a web storage that performs the storage function of the memory 170 on the Internet.

Meanwhile, as described above, the control unit 180 controls the operations related to the application program and the general operation of the mobile terminal 100. [ For example, when the state of the mobile terminal meets a set condition, the control unit 180 can execute or release a lock state for restricting input of a user's control command to applications.

In addition, the control unit 180 performs control and processing related to voice communication, data communication, video call, or the like, or performs pattern recognition processing to recognize handwriting input or drawing input performed on the touch screen as characters and images, respectively . Further, the controller 180 may control any one or a plurality of the above-described components in order to implement various embodiments described below on the mobile terminal 100 according to the present invention.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power necessary for operation of the respective components. The power supply unit 190 includes a battery, the battery may be an internal battery configured to be chargeable, and may be detachably coupled to the terminal body for charging or the like.

In addition, the power supply unit 190 may include a connection port, and the connection port may be configured as an example of an interface 160 through which an external charger for supplying power for charging the battery is electrically connected.

As another example, the power supply unit 190 may be configured to charge the battery in a wireless manner without using the connection port. In this case, the power supply unit 190 may use at least one of an inductive coupling method based on a magnetic induction phenomenon from an external wireless power transmission apparatus and a magnetic resonance coupling method based on an electromagnetic resonance phenomenon Power can be delivered.

5 is a flowchart showing a power saving method of an anchor device in an indoor positioning system according to an embodiment of the present invention.

As shown in FIG. 5, first, the first anchor device 500 receives a wake-up signal from the external device in the sleep mode (S510). Here, the wake-up signal and the sleep signal may be continuous waves or modulated signals. Further, the wake-up signal and the sleep signal may be any one of an ultrasonic signal and an infrared signal.

The second anchor device 600 is in the sleep mode.

Next, the mobile terminal enters the activation mode in response to the received wake-up signal (S520).

According to the present invention, it is possible to wait for a predetermined time after entering the active mode to make the wakeup signal transmission time point between the plurality of anchor devices different. It is possible to prevent physical collision between wake-up signals transmitted by a plurality of anchor devices when the wake-up transmission time is different after entering the activation mode.

The wake-up signal is transmitted to at least one external anchor device (S530). In this case, the wakeup signal transmission time is set differently between the plurality of anchor devices, and the wakeup signal is transmitted. For example, the second anchor device 600 transmits a wake-up signal at a transmission time different from that of the first anchor device.

Upon receiving the wake-up signal from the external device after transmission, the wake-up signal is normally operated independently of the received wake-up signal (S540). In this case, if the wakeup signal is received again from the external device, the first anchor device 500 disregards the wakeup signal.

In the active mode, the sleep signal is received from the external device (S550).

The first anchor device 500 and the second anchor device 600 receive the sleep signal from the external device.

Here, the sleep signal may be a continuous wave or a modulated signal. When the wake-up signal is received from the external device during the sleep sequence, the wake-up sequence is followed. Further, the sleep signal may be an ultrasonic wave or an infrared ray.

According to the embodiment of the present invention, after receiving the sleep signal in the active mode state, it can wait for a predetermined time. It is possible to prevent the wakeup signals from physically colliding with each other after waiting for a predetermined time after receiving the sleep signal.

The received sleep signal is transmitted to at least one external anchor device (S560).

Specifically, the sleep signal transmission time is set differently between a plurality of anchor devices, and the sleep signal is transmitted.

It is checked whether the sleep signal is re-received during the first threshold time for entering the sleep state (S570).

Specifically, when a new sleep signal is received from the external device within the first threshold time, the timer is reset, and the sleep time is checked again for the first threshold time with the starting point as the starting point. Therefore, since the timer is reset, it takes a long time to check whether or not the sleep signal is re-received.

If the sleep signal is not received within the first threshold time, the sleep mode is entered (S580). If the sleep threshold time is exceeded, the sleep mode is entered. At this time, when the sleep signal is received through the IPS connection, it may be omitted to resume the sleep signal.

According to the present invention, the first anchor device 500 receives the sleep signal from the external device and transmits the received sleep signal to the second anchor device 600. Upon entering the sleep mode immediately after transmitting the sleep signal, the mobile terminal can enter the active mode state upon receiving another sleep signal from the external device. The slip signal is based on energy only.

Therefore, in order to prevent such a situation, even if a sleep signal is received from another device before entering the sleep mode with the first threshold time, the timer is paused, the timer is reset, and a sleep signal It does not directly enter the sleep mode state

That is, since there is a guard interval which is a sum of a time interval at which the timer is reset at the start point of the first threshold time period and a new first threshold time interval, the first anchor device 500, even if receiving the sleep signal during the guard interval, .

In addition, the guard interval is set longer than the time for transmitting the sleep signal after each anchor device becomes active. Therefore, when the reception time is in the guard interval, the anchor device receives the sleep signal.

6 is a flowchart illustrating a power saving method of an anchor device in an indoor positioning system according to an embodiment of the present invention.

6 is a method for reliably activating an anchor device in a situation where it is difficult to individually check the on / off state of the anchor device due to a large number of anchor devices of the indoor positioning system, unlike the case of FIG.

Here, the first and second wake-up signals may be continuous wave or modulated signals. The first and second wake-up signals may be any one of an ultrasonic signal and an infrared signal.

Further, the first wake-up signal may be an uncoded ultrasonic signal, the uncoded infrared signal, and the second wake-up signal may be a signal coding the first wake-up signal.

The first wake-up signal serves only to wake up the anchor device by energy transfer, and the second wake-up signal serves to inform that the anchor device receives the wake-up signal. Therefore, although the first wake-up signal is not coded, the second wake-up signal needs to be coded because the transmission signal must transmit a message that it is a wake-up signal.

As shown in FIG. 6, the first wakeup signal is received from the external device in the sleep mode (S610).

And enters the active mode state corresponding to the received first wake-up signal (S620).

According to an embodiment of the present invention, it may wait for a third threshold time to receive a second wake-up signal. If it does not receive the second wake-up signal during the waiting time, it enters the sleep mode. That is, if the second wake-up signal is not received during the waiting time, the ultrasonic signal irrespective of the wake-up signal of the anchor device is received.

Therefore, if the first anchor device 500 receives the first wake-up signal and becomes active, but does not receive the second wake-up signal within the third threshold time period, it is not the wake-up signal transmitted by the other anchor device . Since the first anchor device 500 is erroneously activated, it enters the sleep mode and can prevent unnecessary power wastage.

When receiving from the external device a second wake-up signal that is a pair of the first wake-up signal and a second wakeup signal that is a pair of the first wake-up signal and the second wakeup signal, (Step S630).

Here, since only the first anchor device 500 transmits the first wakeup signal and the second wakeup signal, the other anchor device transmits a message not to transmit the first wakeup signal and the second wakeup signal .

In addition, a path for transmitting a specific packet to at least one external anchor device is different from a path for transmitting the first and second wake-up signals.

For example, when the first and second wake-up signal transmission paths are ultrasonic waves, a path for transmitting a specific packet may be a Wi-Fi or ultra-wideband communication band.

Specifically, when the second anchor device 600 receives a specific packet from another anchor device for a second threshold time, it pauses the timer.

When the second anchor device 600 receives a new second wake-up signal from another anchor device, it operates the remaining time of the paused timer.

The second anchor device 600 transmits a new specific packet to the external anchor device after the remaining time of the timer. That is, after the remaining time of the timer, the subject that transmits the first and second wakeup signals becomes the second anchor device.

If a specific packet is not received during the second threshold time, the first anchor device 500 transmits a new specific packet to the external anchor device (S640).

The first anchor device 500 transmits the first wake-up signal to the external anchor device (S650). The first anchor device 500 transmits a first wake-up signal to the external anchor device and waits for a transmission period to transmit the first and second wake-up signals each time.

Therefore, since there is a constant interval transmission period between the first and second wake-up signals, it is possible to distinguish the first and second wake-up signals.

The first anchor device 500 transmits the second wake-up signal to the external anchor device (S660).

After the transmission, when the first anchor device 500 receives at least one of the first wakeup signal and the second wakeup signal from the external device, the first anchor device 500 operates normally in operation S670.

In the present invention, the first anchor device 500 and the second anchor device 600 will be mainly described. When the first anchor device 500 and the second anchor device 600 receive the first wakeup signal, the first anchor device 500 wakes from the sleep mode and enters the active mode. At this time, the first anchor device 500 and the second anchor device 600 receive the correct wake-up signal from the external anchor device to receive the second wake-up signal coding the first wake-up signal. Otherwise, the ultrasonic wave transmitted from the external device is received and enters the active mode state.

In addition, the first anchor device 500 transmits a specific packet, and after a predetermined time elapses, transmits the first wake-up signal and the second wake-up signal to another anchor device.

When the second anchor device 600 receives the second wake-up signal from the first anchor device 500, the remaining time of the timer is activated, and the second anchor device transmits the specific packet to another anchor device.

Therefore, each anchor device transmits a specific packet and then transmits first and second wake-up signals, so that the first anchor device -> the second anchor device -> the third anchor device -> the fourth anchor device - > ... -> The nth anchor device can be activated.

7 is a block diagram illustrating an anchor device in an indoor positioning system according to an embodiment of the present invention.

As shown in Fig. 7, the anchor device in the indoor positioning system includes the communication module 510 and the controller 520. Fig.

The communication module 510 transmits and receives data with at least one of at least one external anchor device and at least one external device.

The controller 520 receives the first wake-up signal from the external device in the sleep mode, enters the active mode in response to the received first wake-up signal, and generates a second wake- Up signal is received from an external device, it is checked whether or not a specific packet indicating that it is a subject to transmit the first and second wake-up signals is checked for a second threshold time for checking the activation mode state determination, Transmits the set first wake-up signal to the external anchor device, transmits the set second wake-up signal to the external anchor device, and transmits the set wake-up signal to the external anchor device , And receives at least one of the first wake-up signal and the second wake-up signal from the external device, the second wake-up signal and the second wake-up signal independently operate normally.

8 is a flowchart illustrating a power saving method of a mobile device and an anchor device in an indoor positioning system in an environment similar to a home in accordance with an embodiment of the present invention.

As shown in FIG. 8, the mobile device 700 and the anchor device 800 are included as components in the indoor positioning system of a home.

Here, the mobile device 700 may be a smart phone or a smart remote controller.

First, the mobile device 700 is in a sleep mode (S810). The anchor device 700 is in the sleep mode.

Next, the mobile device 700 receives the wake-up trigger signal from the external device (S815) and enters the active mode state (S820).

The mobile device 700 searches for at least one anchor device (S825). Here, the mobile device 700 searches for an anchor device using a Wi-Fi and a high-frequency band used for indoor positioning connection.

The mobile device 700 transmits a wake-up signal to the searched anchor device (S830).

The anchor device 800 enters the active mode state in response to the received wake-up signal (S835).

The anchor device 800 searches for a mobile device using Wi-Fi and a very high frequency band (S840).

The indoor positioning system between the anchor device 800 and the mobile device 700 normally operates (S845).

The mobile device 700 confirms the relationship of the motion sensor value to the threshold (S850).

If the motion sensor value is less than the threshold value, the mobile device 700 transmits the sleep signal to the anchor device 500 (S855). Specifically, if the motion sensor value is less than the threshold value, the mobile device 700 may finely operate in the stationary state or transmit the sleep signal to the anchor device 500 in a stationary state, and enter the indoor positioning system portion into the sleep state .

If the motion sensor value is equal to or greater than the threshold value, the mobile device 700 determines that the motion sensor value is normal and proceeds to normal operation of the indoor positioning system (S845).

The anchor device 800 transmits an Ack signal to the mobile device 700 in response to the received sleep signal. The anchor device 800 receives the sleep signal and enters the sleep mode (S865).

Here, the anchor device 800 transmits the ACK signal using the Wi-Fi and the high-frequency band.

The mobile device 700 receives the ACK signal from the anchor device 800 and enters a sleep mode state (S870).

According to the embodiment of the present invention, the consumed electric power of the anchor device can be reduced by using ultrasonic waves or infrared rays having a small standby power consumption.

According to an embodiment of the present invention, when a new sleep signal is received from an external device within a first threshold time, a timer is adjusted to check whether a sleep signal is re-received, and an anchor device It can be prevented from being activated.

According to an embodiment of the present invention, the first wakeup signal and the second wakeup signal coding the first wakeup signal are transmitted as a pair to the peripheral anchor device, so that the peripheral anchor device is mistakenly It can be prevented from being activated.

According to another embodiment of the present invention, it is possible to prevent a collision between the first wake-up signal and the second wake-up signal by changing the starting point of signal transmission between the anchor devices.

According to an embodiment of the present invention, during a second threshold time for checking the activation mode state determination, it is checked whether a specific packet indicating that it is a subject of transmitting the first and second wakeup signals is received and unnecessary wakeup Signal transmission can be prevented.

The present invention described above can be implemented as computer readable codes on a medium on which a program is recorded. The computer readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of the computer readable medium include a hard disk drive (HDD), a solid state disk (SSD), a silicon disk drive (SDD), a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, , And may also be implemented in the form of a carrier wave (e.g., transmission over the Internet). In addition, the computer may include a control unit 180 of the terminal. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

10, 100: mobile terminal 11:
12: input unit 14: sensing unit
15: display unit 17: memory
18: control unit 30: reference device
50: electronic device 70: server
500: first anchor device
510: communication module 520: controller
600: second anchor device
700: Mobile device

Claims (11)

As an electric power saving method of an anchor device in an indoor positioning system,
Receiving a wake-up signal from an external device in a sleep mode;
Entering the active mode in response to the received wake-up signal;
Transmitting the received wake-up signal to at least one external anchor device;
After receiving a new wake-up signal from the external device, performing a normal operation independent of the received wake-up signal;
Receiving a sleep signal from the external device in an active mode;
Transmitting the received sleep signal to at least one external anchor device; And
Checking whether a sleep signal is re-received during a first threshold time for entering a sleep state
Wherein the anchor device comprises: 2. The method of claim 1, wherein the checking for the first threshold time
Resetting the timer when the new sleep signal is received from the external device within the first threshold time and checking whether the sleep signal is re-received for the first threshold time again with the starting point as the starting point; And
And entering the sleep mode if the sleep signal is not received within the first threshold time
A method of power saving in an anchor device. The method according to claim 1,
Wherein the wake-up signal and the sleep signal are either an ultrasonic signal or an infrared signal
A method of power saving in an anchor device. 2. The method of claim 1, wherein transmitting the received wake-up signal to at least one external anchor device comprises:
And transmitting the wake-up signal by setting a start point of wake-up signal transmission between the plurality of anchor devices differently
A method of power saving in an anchor device. The method of claim 1, wherein the step of transmitting the received sleep signal to at least one external anchor device
And transmitting the sleep signal by setting a different starting point of the sleep signal transmission between the plurality of anchor devices
A method of power saving in an anchor device. As an electric power saving method of an anchor device in an indoor positioning system,
Receiving a first wake-up signal from an external device in a sleep mode;
Entering the active mode in response to the received first wake-up signal;
When receiving from the external apparatus a second wake-up signal that is a pair of the first wake-up signal, transmits itself the first and second wake-up signals during a second threshold time for checking the activation mode state confirmation Checking whether a specific packet is received or not;
Transmitting a new specific packet to the external anchor device if the specific packet is not received during the second threshold time;
Transmitting the first wake-up signal to the external anchor device;
Transmitting the second wake-up signal to the external anchor device; And
Receiving at least one of the first wake-up signal and the second wake-up signal from the external apparatus after transmission,
Wherein the anchor device comprises: The method of claim 6, wherein the step of checking whether the specific packet is received
Pausing a timer when receiving a specific packet from another anchor device during the second threshold time;
Operating a remaining time of the paused timer upon receipt of a new second wake up signal from the another anchor device; And
And transmitting a new specific packet to the external anchor device after the remaining time of the timer expires
A method of power saving in an anchor device. 7. The method of claim 6, wherein a path for transmitting the specific packet to at least one external anchor device is different from a path for transmitting the first and second wake-
A method of power saving in an anchor device. 7. The method of claim 6, further comprising: after entering the active mode corresponding to the received first wake-
Waiting for a third threshold time to receive the second wake-up signal, and
And entering the sleep mode if the second wake-up signal is not received during the waiting time
A method of power saving in an anchor device. 7. The method of claim 6, further comprising: after transmitting the first wake-up signal to at least one anchor device in the vicinity,
Waiting for a transmission period of transmitting the first wake-up signal and the second wake-up signal each time
A method of power saving in an anchor device. A communication module for transmitting and receiving data with at least one of at least one external anchor device and at least one external device; And
A first wake-up signal is received from an external device in a sleep mode, and enters an active mode in response to the received first wake-up signal, and a second wake-up signal in a pair relationship with the first wake- And a control unit for checking whether or not a specific packet is received indicating that it is a subject of transmitting the first and second wake-up signals during a second threshold time for checking the activation mode state determination, Transmits the set first wake-up signal to the external anchor device, and transmits the set second wake-up signal to the external anchor device At least one of the first wake-up signal and the second wake-up signal is received from the external device A controller that operates normally and independently
And an anchor device in the indoor positioning system.

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