WO2013100225A1 - Procédé de positionnement efficace d'un terminal mobile et procédé de gestion de données de position - Google Patents

Procédé de positionnement efficace d'un terminal mobile et procédé de gestion de données de position Download PDF

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Publication number
WO2013100225A1
WO2013100225A1 PCT/KR2011/010259 KR2011010259W WO2013100225A1 WO 2013100225 A1 WO2013100225 A1 WO 2013100225A1 KR 2011010259 W KR2011010259 W KR 2011010259W WO 2013100225 A1 WO2013100225 A1 WO 2013100225A1
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WIPO (PCT)
Prior art keywords
mobile terminal
positioning
time slot
period
value
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PCT/KR2011/010259
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English (en)
Korean (ko)
Inventor
박종태
Original Assignee
경북대학교 산학협력단
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Publication of WO2013100225A1 publication Critical patent/WO2013100225A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0257—Hybrid positioning
    • G01S5/0258—Hybrid positioning by combining or switching between measurements derived from different systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0251—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity
    • H04W52/0254—Power saving arrangements in terminal devices using monitoring of local events, e.g. events related to user activity detecting a user operation or a tactile contact or a motion of the device
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates to an energy efficient positioning method and a location data management method of a mobile terminal.
  • the location is measured and measured in such a manner that energy consumption can be reduced in consideration of the surrounding environment related to the location of the mobile terminal and the movement pattern of the mobile terminal. It relates to how to manage location data.
  • a mobile terminal such as a smart phone and a smart pad
  • a technology using GPS, Assisted GPS, WiFi Positioning System (WPS), and the location of a base station of a 3G / 4G mobile communication network is provided.
  • the location measuring technology receives a radio signal for positioning, analyzes the received radio signal to calculate the current location data of the mobile terminal, and optionally transmits the calculated location data to a server providing a location-based service Since it is implemented to repeat, excessive consumption of the limited power charged in the battery of the mobile terminal.
  • the technical problem to be solved by the present invention is to provide a mobile terminal and its positioning method for calculating its own position data using the positioning radio signal received from its external device in an energy efficient manner.
  • Another technical problem to be solved by the present invention is to provide a location data management method of a mobile terminal for controlling the mobile terminal so that the energy consumption of the mobile terminal is reduced when the location information management server receives the location data of the mobile terminal.
  • a method for positioning a mobile terminal periodically receiving a wireless signal including data related to the location of the mobile terminal at a positioning period, and receiving the wireless signal. Calculating current position data of the mobile terminal based on a difference between the current position data and position data in a previous period, determining whether the movement distance exceeds a stop determination threshold; and Increasing the positioning period only if the travel distance is less than the stop determination threshold.
  • the calculating may further include determining whether the mobile terminal exists indoors by using the current location data.
  • the stop determination limit value, the increase value of the positioning period, the default value of the positioning period, the maximum value at which the positioning period may increase, etc. are changed according to the determination result of the presence of the room. Can be set.
  • a method for positioning a mobile terminal includes periodically receiving a radio signal including data associated with a location of the mobile terminal based on a positioning period. Calculating current position data of the mobile terminal based on a wireless signal, and updating position data of each time slot included in a time slot array stored in the mobile terminal using the current position data.
  • a method for managing a location of a mobile terminal by a location management server wherein the current location data is periodically received from the mobile terminal at a periodical location and the current location data is received.
  • the current location data is periodically received from the mobile terminal at a periodical location and the current location data is received.
  • Upon receipt of (a) calculating a moving distance of the mobile terminal according to the current position, determining whether the moving distance exceeds a stop determination limit value, and (b) if the moving distance is less than the stop determination limit value, Increasing the positioning period of the mobile terminal, and (c) transmitting data for the increased positioning period to the mobile terminal.
  • a method for managing a location of a mobile terminal by a location management server wherein the current location data is periodically received from the mobile terminal at a periodical location and the current location data is received.
  • the location data of each time slot included in the time slot array stored in the location management server using the current location data and (b) the time slot that is the current time slot of the mobile terminal a moving average value of i S i (x, y) for calculation and, (c) a moving average value of the time slot i S i (x, y) and of S i moving average value of the time slot i-1 immediately preceding the time slot -1 (x, y) calculate a moving distance between and, (d) determining whether the moving average value to the difference value exceeds the stop determination threshold value, and, (e) when the movement distance is less than the stop determination threshold value, the Increase a positioning cycle and, (f) includes the sending of the data for the cycle confirmed the increased where the mobile
  • the positioning period based on the moving distance of the moving average value rather than the simple moving distance of the mobile terminal, such as when the user of the mobile terminal moves rapidly, or the user moves back and forth within a certain range. If the necessity is not large, by increasing the positioning period, there is an effect that can reduce the energy consumption required for positioning.
  • FIG. 1 is a diagram showing the configuration of a mobile terminal location information management system for performing a positioning method of a mobile terminal according to an embodiment of the present invention.
  • FIG. 2 is a diagram illustrating a configuration of a system for managing location information of a mobile terminal performing a positioning method of a mobile terminal according to one embodiment of the present invention.
  • FIG. 3 is a block diagram illustrating a configuration of a mobile terminal according to an embodiment of the present invention.
  • FIG. 4 is a flowchart of a positioning method of a mobile terminal according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of a positioning method of a mobile terminal according to an embodiment of the present invention.
  • FIG. 6 is a conceptual diagram of a time slot array for managing location information of a mobile terminal according to an embodiment of the present invention.
  • FIG. 7 is a conceptual diagram of a time slot array for managing location information of a mobile terminal according to an embodiment of the present invention.
  • FIG. 1 shows a mobile terminal positioning system performing the positioning method.
  • the mobile terminal 100 receives a radio signal including data related to the position of the mobile terminal 100, extracts data related to the position of the mobile terminal 100 from the radio signal, the mobile terminal 100 Calculates the current position data.
  • the radio signal is, for example, a GPS signal received from the GPS satellite 10, a Wi-Fi signal received from the AP 30, or received through the mobile communication base station 20. It may be a mobile communication signal.
  • the radio signal including data related to the position of the mobile terminal 100 may be referred to as a radio signal for positioning.
  • the mobile terminal 100 Since the mobile terminal 100 generates a current location data of the mobile terminal by using one or more of the positioning radio signals, a detailed description thereof will be omitted.
  • the mobile terminal 100 may be a computer having a wireless LAN interface, a UMPC (Ultra Mobile PC), a workstation, a net-book, a personal digital assistant (PDA), a portable computer, a web tablet.
  • UMPC Ultra Mobile PC
  • PDA personal digital assistant
  • Wireless phones mobile phones, smart phones, e-books, portable multimedia players, portable game consoles, navigation devices, black boxes ( black box, digital camera, 3-dimensional television, digital audio recorder, digital audio player, digital picture recorder, digital video A digital picture player, a digital video recorder, a digital video player, a device that can send and receive information in a wireless environment, one of the various electronic devices that make up a home network, a computer network A can be an electronic device, such as any of a variety of components that make up a variety of one of the electronic devices, one of various electronic devices constituting a telematics network, or a computing system to configure.
  • the mobile terminal 100 periodically performs a current location data generation process.
  • the period is determined by the mobile terminal 100 in consideration of at least one of the surrounding environment related to the current location of the mobile terminal 100 and the movement pattern of the mobile terminal 100, and the existing period and the determined period In other cases, the cycle may be updated.
  • the period may be referred to as a positioning period.
  • the surrounding environment may refer to the surrounding environment related to the current location of the mobile terminal 100, which the mobile terminal 100 can consider in determining the positioning period. For example, it may mean whether it is present indoors or outdoors, whether it should exist in an urban area, or whether it exists on land or in the ocean.
  • the positioning period may be updated to be longer, thereby reducing power consumption of the mobile terminal 100.
  • the mobile terminal 100 may store map data, and if the current location according to the current location data corresponds to a building area according to the building location on the map data, the mobile terminal 100 may determine that the mobile terminal 100 is located indoors. In addition, the mobile terminal 100 may further reflect that a GPS signal is not received indoors in determining whether there is an indoor.
  • the movement pattern may refer to a movement pattern of the mobile terminal 100, which the mobile terminal 100 can consider in determining the positioning period.
  • the movement type may mean whether it is a constant velocity movement, an equivalent acceleration movement, or an irregular movement in which the acceleration changes with time, in relation to the acceleration, and the position data measured in the immediately preceding period with respect to the movement range.
  • the movement average value calculated using the amount of change compared to the stop determination limit value is exceeded, or the moving average value calculated by weighted average or uniform average of the movement distances of the mobile terminal 100 of two or more cycles is determined to stop. It may be whether the limit is exceeded.
  • the position of the mobile terminal 100 may be regarded as almost stationary or insignificant, in which case the positioning period is longer. By updating, the power consumption of the mobile terminal 100 can be reduced.
  • the mobile terminal 100 needs data on the position of the mobile terminal at least the last period in order to calculate the moving distance or the moving average value. Accordingly, the mobile terminal 100 may store the time slot array shown in FIG. 6 or 7 and update the position data stored in each time slot at each period.
  • the time slot array shown in FIG. 6 includes six slots (SLOT 0 to 5) in total, and each slot may store current position data in the last six periods.
  • SLOT 0 to 5 the position data stored in the time slot array as shown in FIG. 6
  • two-dimensional coordinates are stored as the current location data, but the format of the current location data is not limited to a specific form.
  • the time slot array may be implemented, for example, in a data structure of a last in first out (LIFO) format.
  • the data structure may be, for example, a queue.
  • the mobile terminal 100 shifts the position data of each time slot stored in the time slot array whenever the current data is updated due to a new period, and then inputs the current data into the latest time slot SLOT 5. In this case, the time slot array may be managed.
  • the time slot array shown in FIG. 6 will only store current position data for the last six cycles.
  • the mobile terminal 100 may calculate the moving distance of the last one cycle of the mobile terminal 100 by using the position data stored in SLOT 4 and the position data stored in SLOT 5.
  • the mobile terminal 100 calculates a moving average of one cycle, the location data (LOCATION), the location variation (LD), and the x-axis moving average (S) stored in the time slot array as shown in FIG. a i (x, 0)) and a y-axis moving average value (S i (0, y) ) it can be used.
  • the time slot array shown in FIG. 6 includes a total of six slots (SLOT 0 to 5), except for a location difference (LD), an x-axis moving average (S i (x, 0)), and y.
  • data of the shaft moving average value (S i (0, y) ) may include data only five slots.
  • LD 1 stored in SLOT 2 may mean a moving distance between the position data of SLOT 2 and the position data of SLOT 1, and S 2 (x, 0) stored in SLOT 2 is x in SLOT 2 It can mean the average value of the axis movement, and S 2 (0, y) stored in SLOT 2 may mean the average value of the axis movement in SLOT 2.
  • the moving average value Si (x, y) is calculated as follows.
  • Si (0, y) (1- ⁇ ) S i-1 (0, y) + ⁇ LD i (y), where 0 ⁇ ⁇ 1
  • LD i (x) is a difference value in the x coordinate in the time slot i and the time slot i-1
  • LD i (y) is the time slot i and the time slot i The difference in y coordinates at -1.
  • S 0 (x, 0) DEF_S
  • S 0 (0, y) DEF_S
  • DEF_S may be a predefined moving average starting value.
  • the weight ⁇ is a real value larger than 0 and smaller than 1, for example, 0.4.
  • the moving average has an effect of canceling the effect of the rapid movement compared to the movement distance. For example, when the propagation characteristics suddenly change and the actual position of the mobile terminal 100 is calculated as being greatly moved despite no change, or after the user of the mobile terminal temporarily moves abruptly, In determining whether the mobile terminal 100 moves, such as when returning to, the value seen as noise is immediately reflected, thereby preventing the mobile terminal 100 from frequently measuring the current position.
  • Each slot may store current position data in the last six periods.
  • two-dimensional coordinates are stored as the current position data, but the format of the current position data is not limited to a specific form.
  • the time slot array may be implemented, for example, in a data structure of a last in first out (LIFO) format.
  • the data structure may be, for example, a queue.
  • the mobile terminal 100 becomes a new period and whenever the current data is updated, the location data (LOCATION), location variation (LD), and x-axis moving average value (S i ) of each time slot stored in the time slot array are stored. (x, 0)) and a y-axis moving average value (S i (0, y) ) a shift then to the latest time slot (sLOT 5) the method to input the current data, and to manage the time-slot array have.
  • the time slot array shown in FIG. 7 will only store current position data for the last six cycles.
  • the mobile terminal 100 updates the position change value LD 5 updated in SLOT 5, the x-axis moving average value of SLOT 4 (S 4 (x, 0)), and the y-axis moving average value of SLOT 4 (S 4 (0, y)). ) Can be calculated as follows: the moving average value of the last one cycle of the mobile terminal 100.
  • the mobile terminal 100 may further determine whether the difference value exceeds the stop determination threshold and increase the positioning period according to the result.
  • the mobile terminal 100 may transmit the current location data of the mobile terminal 100 to the location information management server 200 according to the location checking cycle.
  • the location information management server 200 may be a server that simply records the location information of the one or more mobile terminals 100 or a location-based service (LBS) using the location information of the one or more mobile terminals 100. It may be a server that provides. However, the name "server" in the location information management server 200 is only given based on being in a server-client relationship in relation to the mobile terminal 100, and is not limited to the shape of the device, the installation location, and the like.
  • the mobile terminal 100 may receive the location checking period from the location information management server 200 without calculating the location checking cycle by itself. This will be described in detail with reference to FIG. 2.
  • the location information management server 200 when the mobile terminal 100 transmits current location data (S300), the location information management server 200 performs a location checking cycle using the current location data transmitted by the mobile terminal 100. Compute (S320). For the calculation of the positioning period, the location information management server 200 may store the time slot array shown in FIG. 6 or the time slot array shown in FIG. 7. Since the location information management server 200 calculates the location confirmation period may be the same as the method for the mobile terminal 100 to calculate the location confirmation period, duplicate description thereof will be omitted.
  • the location information management server 200 may transmit data about the updated location confirmation period to the mobile terminal 100 (S340).
  • the mobile terminal 100 may receive data about the updated positioning cycle, and update the positioning cycle stored in the mobile terminal 100.
  • the mobile terminal 100 may transmit the current position data according to the updated period (S380).
  • the location information management server 200 having a much richer power resource than the mobile terminal 100 performs the calculation of the positioning period, whereby the mobile terminal 100 checks the position. There is an effect to save the power consumption of calculating the period.
  • the mobile terminal 100 includes a wireless communication unit 110 for receiving the positioning radio signal and current location data of the mobile terminal 100 using the positioning radio signal. Determining whether or not the mobile terminal is present in the room by using the location check unit 140 for generating a map, the map data storage unit 125 for storing map data, and the map data stored in the map data storage unit 125. A location checking period for storing an indoor existence determining unit 120 and the time slot array and updating a positioning period using at least one of data stored in the time slot array and a determination result of the indoor existence determining unit 120.
  • the current position data of the mobile terminal 100 generated by the positioning unit 140 according to the positioning period updated by the adjusting unit 130 and the positioning period adjusting unit 130 is transmitted to the location information management server 200. It may include a location information transmission section 150 for transmitting through the communication line 110.
  • the positioning unit 140 may receive the positioning radio signal from the wireless communication unit 110 according to the positioning cycle updated by the positioning cycle adjusting unit 130, and generate the current position data.
  • the map data storage unit 125 and the positioning period adjusting unit 130 may each include storage means or share one storage means.
  • the storage means may include a nonvolatile memory device such as a flash memory, At least one of a volatile memory device such as a random access memory (RAM) and a storage medium such as a hard disk drive may be implemented.
  • RAM random access memory
  • Each component of FIG. 3 may refer to software or hardware such as a field-programmable gate array (FPGA) or an application-specific integrated circuit (ASIC).
  • FPGA field-programmable gate array
  • ASIC application-specific integrated circuit
  • the components are not limited to software or hardware, and may be configured to be in an addressable storage medium or may be configured to execute one or more processors.
  • the functions provided in the above components may be implemented by more detailed components, or may be implemented as one component that performs a specific function by combining a plurality of components.
  • a positioning method of a mobile terminal according to an embodiment of the present invention will be described with reference to FIG. 4.
  • the mobile terminal 100 sets the positioning period to the default value of the positioning period (S500).
  • the mobile terminal 100 waits for the positioning period (S502), and generates current location data of the mobile terminal 100 using the positioning radio signal (S504).
  • the mobile terminal 100 may determine whether the mobile terminal 100 exists indoors using the current location data. The method of the determination has already been described. If the indoor / outdoor condition is changed, that is, it is determined that the existing indoors exist in the indoors but the outdoor, or vice versa, in updating the location confirmation period of the mobile terminal 100, various kinds of influences may be affected.
  • the values may be changed (S510). For example, the stop determination limit value (a comparison target value in S512), the positioning period increase value (the increase reference value of the positioning period in S516), and the positioning period default value (the value set as the positioning period in S520) may be changed. .
  • the stop determination threshold value, the positioning period increase value, and the positioning period basic value are more determined at the time of indoor existence determination than at the outdoor existence determination. It is desirable to set it to a larger value.
  • the maximum positioning period is increased (S514) to increase the existing positioning period (S516).
  • 4 illustrates a method of summing the positioning period increase value in a manner of increasing the existing positioning period, but it is also possible to multiply the positioning period increase value. In this case, the positioning period does not increase linearly but increases exponentially.
  • the mobile terminal 100 When it is determined that the movement distance exceeds the stop determination threshold (S512), the mobile terminal 100 can be regarded as having moved significantly, and thus, transmits the current position data to the location information management server (S518), and confirms the position.
  • the cycle is initialized to the default value of the positioning cycle (S520).
  • the moving distance during the last 1 period of the mobile terminal 100 is compared with the stop determination limit value (S512).
  • the positioning radio signal is abnormal or the mobile terminal 100 is transient. It is vulnerable to temporary movement, which can be seen as a sudden movement such as a sudden movement, so that the positioning cycle is unnecessarily returned to the initial value.
  • the difference value of the moving average value for the last 1 period is compared with the stop determination threshold (S513), and the abnormality of the positioning radio signal is determined.
  • the movement seen as noise such as a temporary sudden movement of the mobile terminal 100 is temporary, by absorbing a certain portion by the characteristic of the average value, it is possible to prevent the positioning period from returning to the initial value unnecessarily. .
  • the power consumption of the mobile terminal in measuring the position of the mobile terminal and transmitting the measured position data to the location management server, the power consumption of the mobile terminal can be reduced.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Telephone Function (AREA)

Abstract

La présente invention concerne un procédé de positionnement efficace d'un terminal mobile pour positionner un terminal mobile dans une technique pour réduire la consommation d'énergie en prenant en considération l'environnement entourant le terminal mobile et le modèle de mouvement du terminal mobile pour mesurer la position de celui-ci, et un procédé de gestion de données de position. Le procédé de positionnement d'un terminal mobile selon la présente invention comprend les étapes consistant à : recevoir dans une certaine période un signal sans fil comprenant des données relatives à la position du terminal mobile en prenant la période de confirmation de position en tant que la période, et commander des données de position courante sur le terminal mobile sur la base du signal sans fil ; calculer la distance de déplacement par utilisation de la différence entre les données de position courante et les données de position d'une période immédiatement précédente, et déterminer si la distance de déplacement dépasse ou non une tolérance de détermination d'interruption ; et augmenter la période de confirmation de position uniquement dans le cas dans lequel la distance de déplacement est plus petite que la tolérance de détermination d'interruption.
PCT/KR2011/010259 2011-12-28 2011-12-28 Procédé de positionnement efficace d'un terminal mobile et procédé de gestion de données de position WO2013100225A1 (fr)

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KR1020110144911A KR101290748B1 (ko) 2011-12-28 2011-12-28 이동 단말의 에너지 효율적 측위 방법 및 위치 데이터 관리 방법
KR10-2011-0144911 2011-12-28

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KR102218229B1 (ko) * 2019-08-14 2021-02-22 한국항공우주연구원 발사체 위치 측위 시스템 및 방법

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CN105933867B (zh) * 2016-06-23 2019-05-31 长沙学院 基于信道状态信息的被动式两锚点实时室内定位方法

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