JP2007150435A - Communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication system capable of immediately and accurately detecting the position and the state of a person carrying a wireless terminal in a facility wherein obstacles such as walls, floors, furnishings, and household articles are present. <P>SOLUTION: The communication system includes: the movable wireless terminal 2; a plurality of base stations 3 arranged in various spots; an information processing apparatus 5 connected to the base stations 3; and an actual measurement value table 54 wherein a relationship between positions of the wireless terminal 2 and signal strengths detected by the three or more base stations 3 is measured and recorded in advance. The information processing apparatus 5 is characterized in to particularize the position of the wireless terminal 2 by comparing the signal strengths detected by the base stations 3 with contents of the actual measurement value table 54. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a communication system capable of detecting the position and state of an individual carrying a wireless terminal in a specific area or facility.

  Conventionally, various configurations have been proposed for a system for detecting the behavior of each individual in a specific area or facility. Such a system is used, for example, for a security system for a facility including a restricted area, for grasping the location of a staff at an event venue, and for grasping the positions of a care recipient and a care staff at a care facility.

  As a conventional typical configuration of the above system, for example, there is one that uses a monitoring camera to monitor approaching or entering a specific area, or installs a sensor at a predetermined location to detect approaching or passing. . However, such a system using cameras and sensors can be detected only when an individual approaches or passes a certain point. Therefore, for example, when used as a care system, there may be a delay in handling.

  There has also been proposed a system for constantly monitoring a point where an individual is present by using a position detection function by GPS (Global Positioning System) or PHS (Personal Handyphone System). However, the size and weight of the wireless terminal tend to be large, and since the power consumption is large, frequent battery replacement or charging is necessary. The position detection accuracy of these systems is several meters to several tens of meters and is suitable for use in a wide outdoor area, but the accuracy is insufficient for use in facilities. Moreover, these public radio waves may be difficult to reach within the facility, and this is not suitable for use in this respect.

  Furthermore, a system that performs position detection using near field communication such as Bluetooth or RFID has been proposed. If this is used, for example, in a care facility, it is possible to detect the care recipient's wrinkles to some extent. Specifically, a base station that communicates with a wireless terminal is provided in a compartment such as a room in the facility, and the terminal is present in the compartment by determining whether to receive radio waves from the wireless terminal. It is determined whether or not. However, this system is not only capable of detecting in which section of the facility the terminal is present, but it is not sufficient for detailed management such as detecting the approach to dangerous places such as windows and stairs in the section. There wasn't.

  Furthermore, a proposal has been made to perform communication between a wireless terminal and a plurality of base stations using short-range wireless communication, and to detect the position of the wireless terminal with high accuracy by the principle of three-point measurement from the difference in signal strength. Yes. In this system, a large number of two-dimensional base stations are arranged in a free space where there is no interference in radio waves, and at a sufficient distance to detect a significant difference in radio wave attenuation between the terminal and the base station. In the environment, it can have a theoretical effect. In practice, however, radio waves are shielded, attenuated, or reflected due to obstacles such as walls, floors, ceilings, or other furniture in a facility, which is a typical usage environment. Even if the distance is obtained from the signal intensity, practical position detection accuracy cannot be obtained.

  In particular, facilities usually have a plurality of floors. For example, a three-dimensional structure in the vicinity of floor connection facilities such as stairs increases the difficulty of improving positional accuracy. In other words, since the facility is composed of narrowly bent passages, finely partitioned rooms, entrances and the like, it has been difficult to arrange base stations so that ideal three-point measurement can be performed.

  On the other hand, a table that previously measured and recorded the relationship between the position of the wireless terminal and the signal strength detected by three or more base stations has been provided, and the detected signal strength is compared with the signal strength recorded in the table. Thus, a configuration for specifying the position is proposed.

  Japanese Patent Application Laid-Open No. 2003-248045 (Patent Document 1) describes a configuration in which three antennas are provided in a vehicle interior, and a wireless terminal carried by an occupant communicates with Bluetooth to identify a seating position based on signal strength. . Furthermore, a configuration is described in which a table indicating the relationship between the antenna direction corresponding to the predicted position and the reception intensity is prepared in advance and compared with this to improve the position specifying accuracy.

Japanese Patent Laid-Open No. 2003-004835 (Patent Document 2) has a configuration in which a large number of base stations are arranged in a triangular lattice shape in a basement or a building structure, and terminal IDs and beat signals emitted from a transmitter are received by a plurality of base stations. Is described. Further, a configuration is described in which the position of the transmitter is specified with high accuracy by referring to a lookup table in which the terminal ID and beat signal intensity in the measurement target area are previously measured and recorded.
JP 2003-2448045 A JP 2003-004835 A

  An object of the present invention is to provide a communication system capable of immediately and accurately detecting the position and state of an individual carrying a wireless terminal in a facility where obstacles such as walls, floors, furniture fixtures, etc. exist. Yes. Furthermore, by applying it as a care system, it is possible to detect and record the position of the cared person immediately and accurately, and to deal with the cared person's behavior, so that it can be used to protect the cared person The purpose is to provide a system.

  In order to solve the above problems, a typical configuration of a communication system according to the present invention includes a movable wireless terminal, a plurality of base stations arranged in a scattered manner, and an information processing apparatus connected to the base station. An actual value table that measures and records the relationship between the position of the wireless terminal and the signal strength detected by three or more base stations in advance, and the information processing apparatus includes the signal strength and actual value table detected by a plurality of base stations, The position of the wireless terminal is specified by comparing the two. In this way, by specifying the position in comparison with the actual signal strength stored in the measured value table, it is possible to wirelessly accurately even in a facility where there are structures such as walls, floors, ceilings, or indoor furniture fixtures. The position of the terminal can be specified.

  The actual measurement value table further records and records in advance the relationship between the position of the wireless terminal and the communication quality value detected by three or more base stations, and the information processing apparatus can detect the signal strength and communication quality detected by a plurality of base stations. It is preferable to identify the position of the wireless terminal by comparing the value and the actual measurement value table. That is, by determining not only the signal intensity but also the communication quality value, it is possible to mitigate the influence of disturbance and to perform more accurate and stable position specification. Here, PER (packet error rate), BER (bit error rate), correlation (data correlation), LQI (Link Quality Indication), etc. can be used as the communication quality value.

  The actual measurement value table further records and records in advance the relationship between the position of the wireless terminal and the signal strength or communication quality value detected by the wireless terminal with respect to three or more base stations. It is preferable to identify the position of the wireless terminal by comparing the signal strength detected by the wireless terminal and the signal strength or communication quality value detected by the wireless terminal with respect to the base station with the actual measurement value table. That is, by using not only the signal strength or communication quality value obtained on the base station side, but also these values detected on the terminal side, it is possible to perform position determination with higher reliability.

  Furthermore, it is preferable that a tracking table that records the position information and time information of the wireless terminal together is provided, and the information processing apparatus records the position information of the specified wireless terminal and the time when the information is specified in the tracking table. Thereby, the action of the individual carrying the wireless terminal can be recorded, and not only the position but also the moving speed can be obtained.

  It is preferable that the information processing apparatus includes a notification unit that notifies when the position information or tracking data of the specified wireless terminal is in a specific situation. The specific situation may include a case where the wireless terminal is located in a specific area, a case where the wireless terminal moves outside the specific area, and a case where the moving speed is outside the specified range. As a result, it is possible to detect and notify that an individual carrying a wireless terminal (a cared person or the like) has approached a prohibited entry area, has gone out, or is performing abnormal behavior.

  The information processing apparatus further includes a biometric sensor provided in the wireless terminal and a biometric data table storing in advance a pattern of data obtained from the biometric sensor for each individual carrying the wireless terminal. It is preferable that the individual carrying the wireless terminal is specified by comparing the sensor data and the pattern stored in the biometric data table. At this time, the information processing apparatus provides notification means for informing when the individual who should carry the wireless terminal associated with the identification ID of the wireless terminal is different from the individual specified by the data obtained from the biometric sensor. It is preferable to provide. Thereby, the misrecognition by the mistake of a radio | wireless terminal can be prevented.

  The biometric sensor can be a fingerprint authentication device, a pulsation detection device, or the like, but is preferably an acceleration sensor. If an acceleration sensor is used, an individual can always obtain data without performing any special operation, and can also recognize an action state by comparing with a previously stored pattern.

  The information processing apparatus preferably includes notifying means for informing when the data obtained from the acceleration sensor indicates that the wireless terminal is completely stationary. Thereby, misplacement of the wireless terminal can be prevented.

  The wireless terminal is an active RFID, and preferably communicates with the base station intermittently at regular intervals. As a result, power saving of the wireless terminal can be achieved and the battery life can be extended, so that handling can be simplified.

  ADVANTAGE OF THE INVENTION According to this invention, the position and state of the individual who carried the radio | wireless terminal in the area | region or facility in which the base station was installed can be grasped | ascertained very correctly.

[First embodiment]
A first embodiment of a wireless system according to the present invention will be described. In this embodiment, the wireless system will be described as an example when applied as a care system. FIG. 1 is a diagram illustrating a schematic configuration of the present system, FIG. 2 is a diagram illustrating a configuration and usage of a wireless terminal, and FIG. 3 is a diagram illustrating a configuration of a base station and an information processing apparatus.

(System configuration)
As shown in FIG. 1, this system includes a movable wireless terminal 2, a plurality of base stations 3 arranged in a scattered manner in a facility 1, and an information processing apparatus connected to the base station 3 via a network 4. 5 is provided. The information processing apparatus 5 includes an actual measurement value table 54 described later.

  Short-range wireless communication can be used as a communication method between the wireless terminal 2 and the base station 3, and for example, Bluetooth standard, ZigBee standard, RFID, or the like can be preferably used. In this embodiment, description will be made assuming that an active RFID tag is used. In the passive type RDID, the communication range from the sensor is as narrow as several centimeters to several tens of centimeters, whereas in the active type RFID, a communication range of tens of meters is obtained, which is suitable for the configuration of this system.

  The wireless terminal 2 is assumed to be always carried by the care recipient and the care staff (caregiver). The wireless terminal 2 carried by the care receiver includes a control unit 20 and a wireless communication unit 21 as shown in FIG. In addition, a signal strength and communication quality value measuring unit 22 may be provided. The control unit 20 has a timer function (not shown) that activates communication with the base station 3 at regular time intervals. The wireless communication unit 21 can be connected to a plurality of base stations 3.

  As shown in FIG. 2B, the wireless terminal 2 carried by the care staff may further include a call unit 25, an operation unit 26, and a display unit 27. By sending an instruction to the care staff using the call section 25 or the display section 27, it is possible to promote care behavior. Although it is easy to use the PHS system for the call unit 25, an IP phone system using a LAN or a unique voice processing unit may be used.

  As shown in FIG. 2 (c), the wireless terminal 2 can be carried by a method such as being attached to a belt, fixed to a pocket of clothes with a clip, or hung from the neck like a pendant.

  As shown in FIG. 1, the base station 3 is scattered and fixedly arranged in a facility 1 where obstacles such as walls, floors, furniture fixtures and the like exist. In the vicinity of floor connection facilities such as stairs, they are arranged three-dimensionally. As shown in FIG. 3A, the base station 3 includes a control unit 30, a wireless communication unit 31, a signal strength and communication quality value measurement unit 32, a network control unit 33, and a data communication unit 34. The wireless communication unit 31 can be connected to a plurality of wireless terminals 2. The signal strength and communication quality value measuring unit 32 can detect the signal strength and the communication quality value. The data communication unit 34 transmits information received from the wireless terminal 2 to the information processing device 5 via the network control unit 33.

  As the network 4 (see FIG. 1), a network such as a wired LAN, a wireless LAN, or a PHS system can be used. Further, the information processing apparatus 5 can be installed at a remote location with respect to the base station 3 by using a mobile phone, a public line, and a public network (Internet) together.

  As shown in FIG. 3B, the information processing apparatus 5 includes a control unit 50, a network control unit 51, an external communication control unit 52, a position measurement unit 53, an actual measurement value table 54, a tracking table 55, an action determination unit 57, A notification unit 58 and a storage unit 59 are provided. The network control unit 51 is connected to the base station 3 via the network 4. The external communication control unit 52 is for connecting to the outside of the system (for example, a security company) when necessary. As will be described in detail later, the position measuring unit 53 identifies the position of the wireless terminal 2 by comparing information such as signal strength obtained from the base station 3 with values stored in the actual measurement value table 54. As will be described later, the actual measurement value table 54 records the relationship between the position of the wireless terminal 2 and the signal intensity and communication quality value detected by three or more base stations 3. The tracking table 55 stores the position of the wireless terminal 2 and time information in association with each other. The behavior determination unit 57 determines a specific behavior of the care receiver from the detected position information of the wireless terminal 2 and the transition of the position. When the action determination unit 57 determines that the action determination unit 57 determines that the action is a specific action, the notification unit 58 uses the wireless terminal 2 of the care staff or a display unit (not shown) of the system to notify the user. The storage unit 59 stores map information of the monitoring area.

(System operation)
Next, the operation of the communication system configured as described above will be described. FIG. 4 is a diagram for explaining the configuration of the actual measurement value table, FIG. 5 is a flowchart for explaining the procedure for preparing the actual measurement value table, FIG. 6 is a flowchart for explaining the overall operation in the operating state, and FIG. FIG. 8 is a flowchart for explaining the operation of the position specifying process, FIG. 9 is a flowchart for explaining the operation of the danger determination process, and FIG. 10 is a flowchart for explaining another example of the operation of the terminal communication process. is there.

  First, before operating the system, it is necessary to prepare the actual measurement value table 54 of the information processing apparatus 5 in advance. In the actual measurement value table 54, as shown in FIG. 4A, the relationship between at least the position of the wireless terminal 2 measured in advance and the signal strength and communication quality value detected by three or more base stations 3 is recorded. .

  An example of a specific procedure for creating the actual measurement value table 54 will be described. As shown in FIG. 5, first, position detection points are set in a grid pattern in all areas in the facility (S11) (see FIG. 4C). Next, the base station 3 is temporarily placed in the facility 1 (S12). Then, the wireless terminal 2 is arranged at each position detection point to connect each base station 3, and the signal strength and the communication quality value are measured (S13). When specifying the position using the signal strengths and communication quality values with the three base stations 3, the base stations 3 are selected in the order of the strong signal strengths, and the signal strengths and the communication quality values for each are measured value table 54 (S14). Note that data may be recorded and used for four or more base stations 3. It is determined whether or not measurement has been performed for the position detection points of the entire area (S15). If the measurement has not been completed, the wireless terminal 2 is moved and measurement is repeated (S13 to S14). Then, it is determined whether or not there is a significant difference (sufficient difference) in the measurement values between the base stations 3 (S16). If there is no significant difference, the base stations are rearranged (S17), and the measurement is performed again. (S13 to S15).

  By preparing the actual measurement value table 54 by the above method, the actual measurement value table 54 takes into account the shielding, attenuation, and reflection of radio waves due to obstacles such as structures such as walls, floors, and ceilings or indoor furniture fixtures. The signal strength and the communication quality value are recorded. Further, by determining a significant difference at this stage, the arrangement of the base stations 3 can be optimized.

  When the system is in operation, as shown in FIG. 6, the communication system performs terminal communication processing (S20) with the wireless terminal 2, position identification processing (S21), and risk determination processing (S22) in parallel processing. Do it. Each process will be described next.

  In the terminal communication process, as shown in FIG. 7, the control unit 20 of the wireless terminal 2 uses a timer to determine whether or not a predetermined time (for example, 2 seconds) has passed (S30). The main circuit of the terminal 2 is activated (S31). In response to the call signal transmission from the base station 3 (S34), together with the call signal reception response, the wireless terminal ID, name, and sequence number are returned to the base station 3 (S32). Then, the control unit 20 stops the main circuit and puts it into a sleep state (S33).

  Note that communication between the wireless terminal 2 and the base station 3 can be performed continuously. However, by intermittently driving the main circuit of the wireless terminal 2 as described above, the number of wireless terminals 2 that can be connected as viewed from the base station 3 can be increased. Moreover, since the power consumed by the wireless terminal 2 can be reduced, the battery life can be dramatically extended. Accordingly, it is possible to make up for the shortcomings of active RFID using a battery and simplify the handling.

  On the other hand, after transmitting the call signal transmission, the base station 3 waits for a call signal reception response from the wireless terminal 2 (S34), and measures the signal strength and the communication quality value when receiving the call reception response from the wireless terminal 2. (S35). Then, the base station 3 ID, terminal ID, measured signal strength, and communication quality value are transmitted to the information processing apparatus 5 (S36). Each of the plurality of base stations 3 has a function of preventing interference of response radio waves by using time-division time slots corresponding to the stations, and a function of transmitting and receiving between the plurality of base stations 3 and a plurality of wireless terminals. Have each other.

  The information processing device 5 stands by until data is received from the base station 3 (S37), and when received, temporarily stores the data in the storage unit 59 (S38).

  In the position specifying process, as shown in FIG. 8, the control unit 50 of the information processing device 5 determines whether or not the data transmitted from the base station 3 is stored in the storage unit 59 (S40), and is stored. If so, the data is organized for each terminal ID, and a combination pattern of the base station 3 communicating with each wireless terminal 2 and the reception intensity and communication quality value is created. (S41).

  Next, the created combination pattern is compared with the actual measurement value table 54, a point where the pattern approximates is searched (S42), and the corresponding point is specified as the position of the wireless terminal 2 (S43). As an approximation, a pattern that minimizes the data distribution error is obtained in the distribution data, and the position can be determined as the position of the wireless terminal 2. Then, the specified position is recorded in the tracking table 55 together with the terminal ID and the measurement time (S44). When the position is specified, the used data is deleted from the storage unit 59 (S45). This position specifying process is performed on the wireless terminal 2 carried by either the care recipient or the care staff.

  The risk determination process is performed by the behavior determination unit 57 referring to the tracking table 55. As shown in FIG. 9, the action determination unit 57 first reads the latest position information of each wireless terminal 2 and compares it with the registered dangerous position (S51). If they match (S52), notification is made using the notification means 58 (S50). Further, when the terminal radio wave is not detected within the position detection target area, it is also detected as an abnormality. Thereby, it is possible to detect abnormal behavior such as passing through a dangerous point, approaching the point, going out without permission, and failure of the wireless terminal 2 or running out of the battery.

  The notification means 58 performs display on a display device (not shown) provided in the information processing apparatus 5 itself and drives an alarm device. In addition, information is transmitted to the wireless terminal 2 of the care staff in the position close to the cared person where the abnormal behavior is detected, and the ID and name of the cared person to be rescued, the specified position information are determined on the display unit 27. It is possible to display abnormal behavior, instructions to rescue, urgency, etc.

  Next, the behavior determination unit 57 determines the behavior pattern by reading the position information and the time information together. Thereby, it is possible to detect abnormal behavior such as time-series movement status, habit, repeated behavior, long-time immobilization of the care recipient and the care staff. The determined action pattern is compared with the registered danger pattern (S53), and if it matches (S54), the notification means 58 is used to notify (S50). The behavior pattern can be determined in combination with other elements. For example, when the user is hesitant at midnight, it can be registered as a danger pattern.

  Further, the moving speed is calculated from the recorded position and time and compared with the registered allowable range (S55). This makes it possible to detect abnormal behavior such as moving speed that is too fast. And when it is out of range (S56), it alert | reports using the alerting | reporting means 58 (S50). This moving speed can also be judged in combination with other factors, for example, the allowable range in the corridor (recognition of running), the allowable range in stairs (recognition of sliding), etc. can be set individually. it can.

  In the above embodiment, it has been described that the measured value table 54 records the signal strength and the communication quality value. However, only the signal strength may be recorded as a simple configuration, and only the signal strength may be used for specifying the position. Thereby, the calculation load can be reduced and the processing speed can be improved. On the other hand, by specifying not only the signal intensity but also the communication quality value as in the present embodiment, the influence of disturbance can be mitigated, and more accurate and stable position specification can be performed.

  Further, as shown in FIG. 4B, the actual measurement value table 54 is configured to record the signal strength and the communication quality value for each base station 3 detected at the terminal, and to use this for specifying the position. Good.

  The terminal communication process of the system in this case will be described with reference to FIG. When the difference from the terminal communication process described with reference to FIG. 7 is mainly described, when the paging signal reception response (S32) transmitted from the wireless terminal 2 is received (S34), the base station 3 transmits to the wireless terminal 2 In response, a response confirmation is transmitted (S60). Upon receiving the response confirmation (S61), the wireless terminal 2 measures the signal strength and the communication quality value (S62), transmits the measurement value to the base station 3 (S63), stops the main circuit, and enters the sleep state. (S33). When the base station 3 receives the measurement value (S64), the base station 3 transmits data to the information processing apparatus 5 together with the signal strength and communication quality value (S35) measured by itself (S36). 8, the signal strength and communication quality value detected by the base station 3 and the signal strength and communication quality value detected by the wireless terminal 2 for the base station 3 are combined. The comparison is made and the position of the wireless terminal 2 is specified (S42).

  Thus, by using not only the signal strength or communication quality value obtained on the base station side but also these values detected on the terminal side, it is possible to perform position determination with higher reliability.

  As described above, according to the communication system according to the present embodiment, the position is specified in comparison with the actual signal strength stored in the actual measurement value table, so that a structure such as a wall, a floor, or a ceiling, or an indoor Even in a facility with furniture fixtures, it is possible to grasp the position and state of an individual carrying a wireless terminal extremely accurately.

  Furthermore, by recording the behavior of the individual carrying the wireless terminal using the tracking table and determining the behavior pattern, it is possible to detect and notify that the behavior is abnormal. Therefore, it can be used to protect a cared person, particularly by applying it as a care system.

[Second Example]
A second embodiment of the communication system according to the present invention will be described. FIG. 11 is a diagram for explaining the configuration of the wireless terminal and the information processing apparatus according to the second embodiment, FIG. 12 is a flowchart for explaining the operation of terminal communication processing according to the second embodiment, and FIG. 13 is for the second embodiment. It is a flowchart explaining operation | movement of a danger determination process. This embodiment is different from the above embodiment in that the wireless terminal 2 includes a biosensor. As the biometric sensor, a fingerprint authentication device, a pulsation detection device, an acceleration sensor, or the like can be used.

  When a fingerprint authentication device is used as the biometric sensor, it can be used for identity verification. Accordingly, it can be recognized that the individual who should carry the wireless terminal associated with the identification ID of the wireless terminal is different from the individual specified by the data obtained from the biometric sensor. Further, when a pulsation detecting device is used for the biosensor, it is possible to recognize the pulsation when the pulsation is abnormal and notify the information from the notification means 58.

  However, it is preferable to use an acceleration sensor as the biosensor. If an acceleration sensor is used, an individual can always obtain data without performing any special operation, and can also recognize an action state by comparing with a previously stored pattern.

  As shown in FIG. 11A, in this embodiment, the wireless terminal 2 includes an acceleration sensor 23 as an example of a biosensor, and a storage unit 24 that temporarily stores data obtained from the acceleration sensor 23. It has been. When the acceleration sensor 23 is used, the wireless terminal 2 is preferably fixed to the body portion of the person who carries it.

  On the other hand, as illustrated in FIG. 11B, the information processing apparatus 5 includes a biometric data table 56. The biometric data table 56 stores in advance acceleration data patterns for various actions for each individual carrying the wireless terminal 2. Since the data pattern obtained from the acceleration sensor 23 varies depending on the individual, it is possible to identify the individual by comparing and collating with the pattern stored in advance. That is, by using the acceleration sensor 23 as a biosensor, it is possible to identify an individual and to recognize a behavioral state such as walking, resting, and sleeping. Further, since the acceleration sensor 23 does not output any value, it is possible to recognize that the wireless terminal 2 has been misplaced.

  The terminal communication process of the system according to the present embodiment will be described with reference to FIG. If the difference from the terminal communication process described with reference to FIG. 10 is mainly described, the wireless terminal 2 always stores data obtained from the acceleration sensor 23 in the storage unit 24 (S70). When the wireless terminal 2 receives the response confirmation from the base station 3 (S61), it transmits the acceleration sensor data stored in the storage unit 24 to the base station 3 (S71), and then the data in the storage unit 24. Is deleted (S72). Here, the wireless terminal 2 communicates with a plurality of base stations 3, but data may be transmitted to the first connected base station 3 after starting the main circuit (S31). In addition to the ID of the base station 3, the ID of the terminal, the measured signal strength, and the communication quality value, the base station 3 transmits the acceleration sensor data received from the wireless terminal 2 to the information processing apparatus 5 (S73).

  The risk determination process of the system according to the present embodiment will be described with reference to FIG. If the difference from the risk determination processing described with reference to FIG. 9 is mainly described, as an additional determination, the behavior determination unit 57 determines that the individual recognized from the data of the acceleration sensor and the terminal ID of the wireless terminal 2 are one. It is compared whether or not they are matched (S74). If they do not match (S75), the notification means 58 is used for notification (S50). Thereby, the misrecognition by the mistake of a radio | wireless terminal can be prevented.

  Next, the behavior determination unit 57 compares the behavior state recognized from the data of the acceleration sensor and the registered dangerous behavior (S76), and if they match (S77), the behavior determination unit 57 notifies using the notification means 58 (S50). ). Examples of danger patterns include running, falling, complete stop (forgotten), and the like. Thereby, the state of the cared person who cannot be determined only by the position information can be detected, and finer care can be performed.

  In the above embodiment, the communication system according to the present invention is applied to a care system. However, the present invention is not limited to this, and can be used for a security system, a location confirmation system at an event venue, and the like.

  The present invention can be used as a communication system for detecting the position and state of an individual carrying a wireless terminal in a specific area or facility.

It is a figure explaining the schematic structure of a system. It is a figure explaining the structure and usage condition of a radio | wireless terminal. It is a figure explaining the structure of a base station and an information processing apparatus. It is a figure explaining the structure of an actual value table. It is a flowchart explaining the preparation procedure of an actual value table. It is a flowchart explaining the whole operation | movement when it exists in an operation state. It is a flowchart explaining operation | movement of a terminal communication process. It is a flowchart explaining the operation | movement of a position specific process. It is a flowchart explaining operation | movement of a danger determination process. It is a flowchart explaining the other example of operation | movement of a terminal communication process. It is a figure explaining the structure of the radio | wireless terminal and information processing apparatus concerning a 2nd Example. It is a flowchart explaining the operation | movement of the terminal communication process concerning a 2nd Example. It is a flowchart explaining the operation | movement of the danger determination process concerning 2nd Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Facility 2 ... Wireless terminal 3 ... Base station 4 ... Network 5 ... Information processing apparatus 20 ... Control part 21 ... Wireless communication part 22 ... Signal strength and communication quality value measurement part 23 ... Acceleration sensor 24 ... Storage part 25 ... Communication part 26 ... Operation section 27 ... Display section 30 ... Control section 31 ... Wireless communication section 32 ... Signal strength and communication quality value measurement section 33 ... Network control section 34 ... Data communication section 50 ... Control section 51 ... Network control section 52 ... External communication Control unit 53 ... Position measurement unit 54 ... Actual measurement value table 55 ... Tracking table 56 ... Biometric data table 57 ... Behavior determination unit 58 ... Notification means 59 ... Storage unit

Claims (11)

A mobile wireless terminal,
A plurality of base stations arranged in a scattered manner;
An information processing apparatus connected to the base station;
An actual value table that previously measured and recorded the relationship between the position of the wireless terminal and the signal strength detected by three or more base stations;
The information processing apparatus specifies a position of the wireless terminal by comparing signal strengths detected by a plurality of base stations with the actual measurement value table. The actual measurement value table further records and records the relationship between the position of the wireless terminal and the communication quality value detected by three or more base stations in advance,
The information processing apparatus identifies the position of the wireless terminal by comparing signal intensity and communication quality values detected by a plurality of base stations with the actual measurement value table. Communications system. The actual measurement value table further measures and records the relationship between the position of the wireless terminal and the signal strength or communication quality value detected by the wireless terminal for the base station of 3 or more,
The information processing apparatus compares the signal strength detected by a plurality of base stations and the signal strength or communication quality value detected by the wireless terminal with respect to the base station with the actual measurement value table. 2. The communication system according to claim 1, wherein the position of the communication system is specified. Furthermore, a tracking table that records the position information and time information of the wireless terminal together,
The communication system according to claim 1, wherein the information processing apparatus records position information of the specified wireless terminal and a specified time in the tracking table. The communication system according to claim 4, wherein the information processing apparatus includes notification means for notifying when the specified location information or tracking data of the wireless terminal is in a specific situation. 6. The communication system according to claim 5, wherein the specific situation includes a case where the wireless terminal is located in a specific area, a case where the wireless terminal moves outside the specific area, and a case where the moving speed is out of a specified range. . Furthermore, a biological sensor provided in the wireless terminal,
A biometric data table storing in advance a pattern of data obtained from the biometric sensor for each individual carrying the wireless terminal;
The information processing apparatus identifies an individual carrying the wireless terminal by comparing the data of the biometric sensor transmitted from the wireless terminal with a pattern stored in the biological data table. The communication system according to claim 1. The information processing apparatus notifies when an individual who should carry the wireless terminal associated with the identification ID of the wireless terminal is different from an individual specified by data obtained from the biometric sensor. The communication system according to claim 7, further comprising: The communication system according to claim 7, wherein the biological sensor is an acceleration sensor. The communication according to claim 9, wherein the information processing device includes notification means for notifying when data obtained from the acceleration sensor indicates that the wireless terminal is completely stationary. system. The communication system according to claim 1, wherein the wireless terminal is an active RFID, and communicates with the base station intermittently at regular intervals.