JP4584299B2 - Position management system, position management method, and management apparatus - Google Patents

Description

  The present invention relates to a position management system, a position management method, and a management apparatus that manage the position of a wireless terminal.

  Conventionally, a system for detecting the position of a wireless terminal such as a mobile phone or a wireless tag is known. In such a system, technologies such as GPS (Global Positioning System), wireless LAN (TDOA (Time Differentiation of Arrival) method, RSSI (Received Signal Strength Indicator) method, etc.), wireless tags, and the like are used.

  By using such a system to manage the position of the user in real time, it is possible to provide a presence service and a staffing service. The presence service is a service for grasping where a specific user (such as an employee) who wants to communicate is located. The staffing service is a service for grasping which user (employee, etc.) is efficiently directed to the dispatch destination.

  Here, in order to manage the position of the user in real time, it is preferable that the period at which the wireless terminal measures the position (measurement period) and the period at which the wireless terminal reports the position (report period) are shorter. On the other hand, shortening the measurement period and the reporting period increases the power consumption of the wireless terminal and increases the amount of wireless traffic.

In response to this, a technique (1) has been proposed that shortens the measurement cycle when the base station to which the mobile phone is connected is changed on the assumption that the mobile phone uses GPS to measure the position ( For example, Patent Document 1). Also, a technique (2) for measuring the position only when the wireless tag is moving has been proposed on the assumption that a motion sensor is mounted on the wireless tag.
JP 2006-153695 A

  However, in the technique (1) described above, the measurement cycle is shortened each time the base station to which the mobile phone is connected is changed. Therefore, in the case where the user frequently moves, the position measurement is frequently repeated. In the above-described conventional technique (2), the position measurement is repeated each time the wireless tag moves.

  Therefore, it is possible to manage the user's location in real time, but the power consumption and the amount of wireless traffic are insufficient.

  It should be noted that the above-described presence service and staffing service do not require real-time management of the user's position in cases where the user's position is not referred to (for example, outside work hours). .

  Accordingly, the present invention has been made to solve the above-described problems, and aims to reduce the power consumption of the wireless terminal and the amount of wireless traffic while managing the position of the user to some extent in real time. An object of the present invention is to provide a position management system, a position management method, and a management apparatus that can be used.

  The location management system according to the first feature includes a wireless terminal and a management device. The wireless terminal includes a position measurement unit (measurement unit 13) that measures the position of the terminal itself at a predetermined measurement cycle, and a position report unit (report unit) that reports the position measured by the position measurement unit to the management device at a predetermined report cycle. Transmitter 14). The management device includes a location management unit (location management DB 42) that manages a location reported from the wireless terminal, a reception unit (reception unit 41) that receives a location reference request for requesting reference to the location of the wireless terminal, An instruction unit (instruction unit 45) for instructing the wireless terminal, which is the target of the position reference request, to shorten the predetermined measurement period;

  According to such a feature, on the assumption that the wireless terminal measures the position of its own terminal at a predetermined measurement period, the management apparatus shortens the predetermined measurement period for the wireless terminal that is the target of the position reference request. Instruct.

  Therefore, it is possible to reduce the power consumption of the wireless terminal and the amount of wireless traffic while managing the position of the wireless terminal (user) to some extent in real time.

  In the first feature, the instruction unit instructs the wireless terminal that is the target of the position reference request to shorten the predetermined reporting period.

  1st characteristic WHEREIN: The said position management part manages the said radio | wireless terminal made into the object of the said position reference request | requirement as a reference object terminal, The said radio | wireless terminal not made into the object of the said position reference request | requirement is a non-reference object terminal Manage as. The management device includes a measurement cycle management unit (cycle management DB 43) that manages the predetermined measurement cycle corresponding to the reference target terminal and the predetermined measurement cycle corresponding to the non-reference target terminal. The predetermined measurement period corresponding to the reference target terminal is shorter than the predetermined measurement period corresponding to the non-reference target terminal.

  1st characteristic WHEREIN: The said management apparatus further has a position provision part (providing part 44) which provides regularly the position of the said reference object terminal with respect to the request origin terminal which is the transmission origin of the said position reference request. .

  In the location management method according to the second feature, the management device manages the location of the wireless terminal. The location management method includes a step A in which the wireless terminal measures the position of its own terminal at a predetermined measurement period, and a step in which the wireless terminal reports the position measured in the step A to the management apparatus at a predetermined reporting period. B, step C in which the management device manages the location reported from the wireless terminal, step D in which the management device accepts a location reference request for requesting reference to the location of the wireless terminal, and the management device Includes a step E of instructing the wireless terminal that is the target of the position reference request to shorten the predetermined measurement period.

  The management device according to the third feature manages the position of the wireless terminal measured at a predetermined measurement cycle. The management apparatus includes a position management unit that manages a position reported from the wireless terminal, a reception unit that receives a position reference request for requesting reference to the position of the wireless terminal, and the wireless terminal that is the target of the position reference request An instruction unit for instructing shortening of the predetermined measurement cycle.

  According to the present invention, there is provided a position management system, a position management method, and a management apparatus that can reduce the power consumption of a wireless terminal and the amount of wireless traffic while managing the position of a user to some extent in real time. Can be provided.

  Hereinafter, a location management system according to an embodiment of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals.

  However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones. Therefore, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

[First Embodiment]
(Configuration of location management system)
Hereinafter, the configuration of the location management system according to the first embodiment will be described with reference to the drawings. FIG. 1 is a diagram illustrating a configuration of a location management system according to the first embodiment.

  As illustrated in FIG. 1, the location management system includes a plurality of wireless terminals 10 (wireless terminals 10A and 10B), a wireless connection device 20, a network 30, a management device 40, and a request source terminal 50. .

  The wireless terminal 10 is a terminal such as a wireless LAN terminal, a mobile phone, or a wireless tag, and has a function of measuring the position of the terminal itself. For example, the wireless terminal 10 measures the position of the terminal itself and reports the position of the terminal itself to the management apparatus 40 by the following method. Details of the wireless terminal 10 will be described later (see FIG. 2).

(1) Received Signal Strength Indicator (RSSI) System In the RSSI system, the radio terminal 10 is configured based on the reception strength of radio waves received by the radio terminal 10 from the plurality of radio connection apparatuses 20 and the positions of the plurality of radio connection apparatuses 20. The position is obtained by triangulation. It should be noted that the position of the wireless connection device 20 is known.

(2) TDOA (Time Difference of Arrival) method In the TDOA method, the position of the wireless terminal 10 is determined based on the time difference of the radio waves received by the wireless terminal 10 from the plurality of wireless connection devices 20 and the position of the plurality of wireless connection devices 20. Is obtained by triangulation. It should be noted that the position of the wireless connection device 20 is known.

(3) GPS (Global Positioning System) System In the GPS system, the position of the wireless terminal 10 is acquired by radio waves received from a plurality of satellites.

(4) Wireless tag method The position of the wireless terminal 10 (wireless tag) is acquired by the position of the wireless tag reader that reads the wireless tag. Since the wireless tag reader and the wireless terminal 10 (wireless tag) are connected by short-range wireless communication, the position of the wireless tag reader may be considered as the position of the wireless terminal 10 (wireless tag). It should be noted that the position of the wireless tag reader is known.

  In the first embodiment, it is assumed that the user A has the wireless terminal 10A and the user B has the wireless terminal 10B.

  The wireless connection device 20 is a device that performs wireless communication with the wireless terminal 10. For example, when the wireless terminal 10 is a mobile phone, the wireless connection device 20 is a wireless base station in a mobile communication network. When the wireless terminal 10 is a wireless LAN terminal, the wireless connection device 20 is an access point in the wireless LAN. When the wireless terminal 10 is a wireless tag, the wireless connection device 20 is a wireless tag reader.

  The network 30 is a network that connects the wireless connection device 20, the management device 40, and the request source terminal 50. The network 30 is a mobile communication network, a wireless LAN, or the like, and may be configured by a single type of network or may be configured by a plurality of types of networks.

  The management device 40 is a device that manages the position of the wireless terminal 10. The management device 40 provides the location of the wireless terminal 10 to the request source terminal 50. Details of the management device 40 will be described later (see FIG. 3).

  The request source terminal 50 is a terminal (for example, a personal computer) that requests the management device 40 to refer to the position of the wireless terminal 10. Specifically, the request source terminal 50 transmits a position reference request for requesting reference to the position of the wireless terminal 10 to the management device 40. On the other hand, the request source terminal 50 acquires the position of the wireless terminal 10 returned in response to the position reference request.

  Such a location management system provides a presence service and a staffing service by managing the location of the wireless terminal 10. The presence service is a service for grasping where a specific user (such as an employee) who wants to communicate is located. The staffing service is a service for grasping which user (employee, etc.) is efficiently directed to the dispatch destination.

(Configuration of wireless terminal)
Hereinafter, the configuration of the wireless terminal according to the first embodiment will be described with reference to the drawings. FIG. 2 is a block diagram showing the radio terminal 10 according to the first embodiment.

  As illustrated in FIG. 2, the wireless terminal 10 includes a reception unit 11, a setting unit 12, a measurement unit 13, and a transmission unit 14.

  The receiving unit 11 receives information indicating a cycle for measuring the position of the terminal itself (hereinafter referred to as a measurement cycle) from the management device 40. The receiving unit 11 receives from the management device 40 information indicating a cycle for reporting the position of the terminal itself (hereinafter referred to as a report cycle).

  The setting unit 12 sets a measurement cycle and a report cycle. Specifically, the setting unit 12 sets a measurement cycle and a report cycle according to information received from the management device 40.

  Here, the setting unit 12 may set default values for the measurement period and the report period in advance. In such a case, the setting unit 12 changes the measurement cycle and the report cycle according to the information received from the management device 40.

  The measurement unit 13 measures the position of the terminal itself at the measurement cycle set by the setting unit 12. As described above, the position measurement by the measurement unit 13 includes (1) RSSI system, (2) TDOA system, (3) GPS system, and (4) wireless tag system.

  The transmission unit 14 transmits the position of the terminal itself to the management device 40 at the report cycle set by the setting unit 12.

(Management device configuration)
The configuration of the management apparatus according to the first embodiment will be described below with reference to the drawings. FIG. 3 is a block diagram showing the management device 40 according to the first embodiment.

  As illustrated in FIG. 3, the management device 40 includes a reception unit 41, a position management DB 42, a cycle management DB 43, a provision unit 44, an instruction unit 45, and a transmission unit 46.

  The receiving unit 41 receives a location reference request for requesting reference to the location of the wireless terminal 10 from the request source terminal 50. The location reference request includes an identifier of the wireless terminal 10 (reference target terminal) that is a location reference target. The receiving unit 41 receives the position of the wireless terminal 10 from the wireless terminal 10.

  The location management DB 42 is a database that manages the location reported from the wireless terminal 10 for each wireless terminal 10. Specifically, the location management DB 42 manages user identifiers, reference flags, and locations as shown in FIG.

  The user identifier is an identifier that identifies a user who owns the wireless terminal 10. It goes without saying that the location management DB 42 may manage an identifier for identifying the wireless terminal 10 instead of the user identifier.

  The reference flag is a flag indicating whether or not the wireless terminal 10 is a position reference request target. Specifically, when the wireless terminal 10 is a position reference request target, “1” is set in the reference flag. If the wireless terminal 10 is not the target of the location reference request, “0” is set in the reference flag.

  The position is a position reported from the wireless terminal 10. The position may be information indicating latitude and longitude (for example, W-S203), or may be information indicating a specific place (for example, conference room 1-108).

  The cycle management DB 43 is a database that manages the measurement cycle and the report cycle. Specifically, as shown in FIG. 5, the cycle management DB 43 manages user identifiers, reference target terminals, measurement cycles, and report cycles.

  The user identifier is an identifier that identifies a user who owns the wireless terminal 10. It goes without saying that the location management DB 42 may manage an identifier for identifying the wireless terminal 10 instead of the user identifier.

  The reference target terminal is information indicating whether or not the wireless terminal 10 is a location reference request target. Specifically, when the wireless terminal 10 is a location reference request target, the reference target terminal is “YES”. When the wireless terminal 10 is not the target of the location reference request, the reference target terminal is “NO”.

  The measurement cycle is a cycle in which the wireless terminal 10 measures the position. Here, the measurement cycle corresponding to the radio terminal 10 (reference target terminal) whose reference target terminal is “YES” is the measurement cycle corresponding to the radio terminal 10 (non-reference target terminal) whose reference target terminal is “NO”. Note that it is shorter than.

  The reporting period is a period in which the wireless terminal 10 reports a position. Here, the reporting period corresponding to the wireless terminal 10 (reference target terminal) whose reference target terminal is “YES” is the reporting period corresponding to the wireless terminal 10 (non-reference target terminal) whose reference target terminal is “NO”. Note that it is shorter than.

  It should be noted that in the first embodiment, the measurement period is the same as the reporting period. Moreover, the measurement cycle and the report cycle are determined for each wireless terminal 10 (user).

  The providing unit 44 provides the request source terminal 50 with the position of the wireless terminal 10 (reference target terminal) that is the target of the position reference request. Specifically, the providing unit 44 refers to the location management DB 42 and acquires the location of the reference target terminal. Subsequently, the providing unit 44 instructs the transmitting unit 46 to transmit the position of the reference target terminal.

  The instruction unit 45 refers to the cycle management DB 43 and instructs the wireless terminal 10 about the measurement cycle and the report cycle. Specifically, the instruction unit 45 instructs the transmission unit 46 to transmit information indicating the measurement period and the reporting period corresponding to the reference target terminal “YES” when the non-reference target terminal is changed to the reference target terminal. To do. On the other hand, when the reference target terminal is changed to the non-reference target terminal, the transmission unit 46 is instructed to transmit information indicating the measurement period and the report period corresponding to the reference target terminal “NO”.

  The transmission unit 46 transmits the position of the wireless terminal 10 (reference target terminal) that is the target of the position reference request to the request source terminal 50 in accordance with the instruction of the providing unit 44.

  The transmission unit 46 transmits information indicating the measurement period and the report period to the wireless terminal 10 in accordance with an instruction from the instruction unit 45. Specifically, the transmission unit 46 transmits information indicating the measurement period and the reporting period corresponding to the reference target terminal “YES” to the wireless terminal 10 changed from the non-reference target terminal to the reference target terminal. The transmission unit 46 transmits information indicating the measurement period and the reporting period corresponding to the reference target terminal “NO” to the wireless terminal 10 changed from the reference target terminal to the non-reference target terminal.

(Operation of location management system)
Hereinafter, the operation of the location management system according to the first embodiment will be described with reference to the drawings. FIG. 6 is a sequence diagram showing the operation of the location management system according to the first embodiment.

  As illustrated in FIG. 6, in Steps 10A to 10C, the wireless terminal 10 measures the position of its own terminal at the measurement cycle (1) and then reports the position of its own terminal. The measurement cycle (1) is a measurement cycle corresponding to the reference target terminal “NO”. The management device 40 updates the location management DB 42 with the location reported from the wireless terminal 10.

  In step 20, the request source terminal 50 transmits a position reference request for requesting reference to the position of the wireless terminal 10 to the management device 40.

  In step 30, the management device 40 updates the reference flag. Specifically, the management device 40 sets “1” in the reference flag.

  In step 40, the management device 40 refers to the cycle management DB 43 and acquires a measurement cycle corresponding to the reference target terminal “YES”. Subsequently, the management device 40 transmits information indicating the measurement cycle corresponding to the reference target terminal “YES” to the wireless terminal 10.

  In Step 50A to Step 50C, the management device 40 refers to the position management DB 42 and acquires the position of the wireless terminal 10. Subsequently, the management device 40 transmits the position of the wireless terminal 10 to the request source terminal 50.

  In Step 60A to Step 60C, the wireless terminal 10 measures the position of the own terminal in the measurement cycle (2) and then reports the position of the own terminal. The measurement cycle (2) is a measurement cycle corresponding to the reference target terminal “YES”. The management device 40 updates the location management DB 42 with the location reported from the wireless terminal 10.

  It should be noted that since the location management DB 42 is updated with the location reported from the wireless terminal 10, the location acquired by the request source terminal 50 is the latest version. For example, in step 50A, the management device 40 transmits the position received in step 10C to the request source terminal 50. In step 50B, the management device 40 transmits the position received in step 60A to the request source terminal 50. In step 50C, the management device 40 transmits the position received in step 60C to the request source terminal 50.

  Here, the period (providing period) at which the management device 40 provides the position of the wireless terminal 10 to the request source terminal 50 may be constant or variable. For example, the position of the wireless terminal 10 may be provided every time the position of the wireless terminal 10 is received, or the position of the wireless terminal 10 may be provided every time the position of the wireless terminal 10 changes.

(Function and effect)
In the first embodiment, on the assumption that the wireless terminal 10 measures the position of its own terminal at the measurement cycle (1), the management device 40 performs the following operations on the wireless terminal 10 that is the target of the position reference request: A measurement cycle (2) shorter than the measurement cycle (1) is indicated.

  Therefore, it is possible to reduce the power consumption of the wireless terminal 10 and the amount of wireless traffic while managing the position of the wireless terminal 10 (user) to some extent in real time.

[Second Embodiment]
The second embodiment will be described below with reference to the drawings. In the following, differences between the first embodiment and the second embodiment described above will be mainly described.

  Specifically, in the second embodiment, the measurement period and the report period are changed according to the number of users (the number of wireless terminals 10).

(Measurement cycle and reporting cycle)
Hereinafter, the measurement period and the report period according to the second embodiment will be described with reference to the drawings. FIG. 7 is a diagram illustrating an example of information stored in the cycle management DB 43 according to the second embodiment.

  As illustrated in FIG. 7, the cycle management DB 43 manages the number of users, the reference target terminal, the measurement cycle, and the report cycle.

  The number of users is the number of users (wireless terminals 10) registered in the location management system. That is, the number of users is the sum of the number of reference target terminals and the number of non-reference target terminals.

  Here, it is preferable that the measurement period and the reporting period be longer as the number of users is larger in order to reduce the amount of radio traffic.

[Other Embodiments]
Although the present invention has been described with reference to the above-described embodiments, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  In the embodiment described above, the wireless terminal 10 measures the position at the measurement cycle instructed from the management device 40, but is not limited to this. Specifically, the management device 40 may transmit a position measurement request for requesting measurement of the position of the wireless terminal 10 to the wireless terminal 10 for each measurement period. The wireless terminal 10 measures the position of the own terminal in response to the position measurement request. It should be noted that the management device 40 instructs the cycle in which the wireless terminal 10 measures the position by the management device 40 transmitting the position measurement request.

  In the embodiment described above, the wireless terminal 10 reports the position at the reporting cycle instructed from the management device 40, but is not limited to this. Specifically, the management device 40 may transmit a location report request for requesting a report of the location of the wireless terminal 10 to the wireless terminal 10 for each reporting period. The wireless terminal 10 reports the position of the own terminal in response to the position report request. It should be noted that the management device 40 instructs the period for the wireless terminal 10 to report the location by the management device 40 transmitting the location report request.

  Although not particularly mentioned in the above-described embodiment, the measurement period or report period stored in the period management DB 43 may be appropriately rewritten by the operator.

  In the above-described embodiment, the measurement period and the reporting period are the same, but the measurement period and the reporting period may be different. Specifically, the measurement cycle may be lengthened as the remaining battery level of the wireless terminal 10 decreases. In such a case, the wireless terminal 10 reports the remaining battery level of its own terminal to the management device 40. Further, the reporting cycle may be lengthened as the amount of wireless traffic between the wireless terminal 10 and the wireless connection device 20 increases. In such a case, the wireless terminal 10 or the wireless connection device 20 reports the wireless traffic amount to the management device 40.

It is a figure showing composition of a position management system concerning a 1st embodiment. 1 is a block diagram showing a radio terminal 10 according to a first embodiment. It is a block diagram showing management device 40 concerning a 1st embodiment. It is a figure which shows an example of the information stored in location management DB42 which concerns on 1st Embodiment. It is a figure which shows an example of the information stored in the period management DB43 which concerns on 1st Embodiment. It is a sequence diagram which shows operation | movement of the position management system which concerns on 1st Embodiment. It is a figure which shows an example of the information stored in the period management DB43 which concerns on 2nd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Wireless terminal, 11 ... Reception part, 12 ... Setting part, 13 ... Measurement part, 14 ... Transmission part, 20 ... Wireless connection apparatus, 30 ... Network, 40 ... Management device, 41 ... Reception unit, 42 ... Location management DB, 43 ... Period management DB, 44 ... Provision unit, 45 ... Instruction unit, 46 ... Transmission unit, 50 ... Requesting terminal

Claims (8)

A location management system including a wireless terminal and a management device,
The wireless terminal is
A position measuring unit that measures the position of the terminal at a predetermined measurement cycle;
A position reporting unit that reports the position measured by the position measuring unit to the management device at a predetermined reporting cycle;
The management device
A location management unit that manages the location reported from the wireless terminal;
A reception unit that receives a position reference request for requesting reference to the position of the wireless terminal;
An instruction unit for instructing the predetermined measurement cycle to a reference target terminal that is the wireless terminal that is the target of the location reference request
Have
The location management system characterized in that the instruction unit lengthens the predetermined measurement period and the predetermined report period as the number of users, which is the sum of the number of reference target terminals and the number of non-reference target terminals, increases . The wireless terminal reports its battery level to the management device,
The position management system according to claim 1, wherein the instruction unit lengthens the predetermined measurement cycle based on the reported remaining battery level as the remaining battery level of the reference target terminal decreases . Before SL management apparatus has a predetermined measurement period corresponding to the reference target terminal, the measurement cycle management unit for managing a predetermined measurement period corresponding to the non-reference target terminal,
The location management system according to claim 1, wherein the predetermined measurement period corresponding to the reference target terminal is shorter than the predetermined measurement period corresponding to the non-reference target terminal.   The said management apparatus further has a position provision part which provides regularly the position of the said reference object terminal with respect to the request origin terminal which is a transmission source of the said position reference request. Location management system. A location management method in which a management device manages the location of a wireless terminal,
Step A in which the wireless terminal measures the position of the terminal at a predetermined measurement period;
Step B in which the wireless terminal reports the position measured in Step A to the management device at a predetermined reporting period;
Step C where the management device manages the location reported from the wireless terminal;
Step D in which the management device receives a location reference request for requesting reference to the location of the wireless terminal;
The management device, with respect to the reference target terminal is said wireless terminal that is subject to the position reference request, and a step E for instructing the predetermined measurement period,
In the step E, the predetermined measurement period and the predetermined report period are lengthened as the number of users, which is the sum of the number of reference target terminals and the number of non-reference target terminals, increases . The wireless terminal has a step of reporting the battery level of its own terminal to the management device,
The location management method according to claim 5, wherein in the step E, the predetermined measurement cycle is lengthened as the remaining battery level of the reference target terminal decreases based on the reported remaining battery level. A management device that manages the position of a wireless terminal measured at a predetermined measurement cycle,
A location management unit that manages the location reported from the wireless terminal;
A reception unit that receives a position reference request for requesting reference to the position of the wireless terminal;
With respect to the reference target terminal is said wireless terminal that is subject to the position reference request, possess an instruction unit for instructing the predetermined measurement period,
The said instruction | indication part lengthens the said predetermined measurement period and the said predetermined report period, so that there are many users who are the sum total of the number of the said reference object terminals and the number of non-reference object terminals, The management apparatus characterized by the above-mentioned. 8. The management apparatus according to claim 7, wherein the instruction unit increases the predetermined measurement cycle as the remaining battery level of the reference target terminal decreases based on the remaining battery level of the wireless terminal reported from the wireless terminal. .

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