JP2013197947A - Radio communication system, radio communication method, radio communication device, and method and program for controlling radio communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio communication system capable of setting a suitable accommodating device for a radio communication terminal depending on the load of radio communication devices.SOLUTION: A radio communication system 1000 includes a plurality of radio communication terminals and a plurality of radio communication devices. Each radio communication device is allowed to radio communicate with radio communication terminals that the radio communication device accommodates and sets its state into either an active or sleep state. The radio communication system 1000 comprises: a load information acquisition section 1001 that acquires for each of the plurality of radio communication devices, device load information indicating load on the radio communication device and neighbor load information indicating load of other radio communication devices located in the vicinity of the radio communication device; and an accommodating device change section 1002 that changes an accommodating device that accommodates a radio communication terminal on the basis of the acquired device load information and neighbor load information.

Description

  The present invention relates to a wireless communication system including a plurality of wireless communication terminals and a plurality of wireless communication devices configured to be able to perform wireless communication with the wireless communication terminals.

  There is known a wireless communication system including a plurality of wireless communication terminals and a plurality of wireless communication devices configured to execute wireless communication with the wireless communication terminals. In the wireless communication system described in Patent Document 1 as one of this type of wireless communication system, each of a plurality of wireless communication devices permits wireless communication with a wireless communication terminal belonging to the wireless communication device. Configured to do.

  Further, each of the plurality of wireless communication devices is configured to set the state of the wireless communication device to one of an activated state and a sleep state. The activated state is a state in which arbitrary data can be wirelessly communicated with the wireless communication terminal in accordance with a predetermined first communication method. In the sleep state, the activation signal can be received according to the second communication method in which the power required for receiving the wireless signal is smaller than that of the first communication method, and the wireless communication terminal and the first communication method are It is in a state where it is impossible to execute the wireless communication.

  Accordingly, it is possible to reduce the amount of power consumed by the wireless communication device during the period when the state of the wireless communication device is set to the sleep state.

JP 2009-77375 A

  By the way, for example, when a relatively large number of wireless communication terminals belong to a specific wireless communication device, the load on the wireless communication device is relatively large. In this case, the quality of wireless communication between the wireless communication device and the wireless communication terminal may be degraded. Therefore, in this case, it is considered preferable to change the belonging device, which is the wireless communication device to which the wireless communication terminal belongs, to a wireless communication device with a relatively small load.

  In addition, when the load on each of the plurality of wireless communication devices is relatively small, by assigning all wireless communication terminals to some of the plurality of wireless communication devices, the state of the other wireless communication device It is possible to increase the possibility that the time set in the sleep state becomes longer. Therefore, in this case, it is considered preferable to change the belonging device that is the wireless communication device to which the wireless communication terminal belongs to a specific wireless communication device.

  However, in the above wireless communication system, there is a possibility that an appropriate affiliated device according to the load of the wireless communication device cannot be set for the wireless communication terminal.

  For this reason, the object of the present invention is to solve the above-mentioned problem that “the case where an appropriate affiliated device cannot be set for the wireless communication terminal according to the load of the wireless communication device may occur”. It is to provide a wireless communication system.

  In order to achieve such an object, a wireless communication system according to an aspect of the present invention is a system including a plurality of wireless communication terminals and a plurality of wireless communication apparatuses configured to be able to perform wireless communication with the wireless communication terminals. is there.

Further, each of the plurality of wireless communication devices is
Configured to allow wireless communication with a wireless communication terminal belonging to the wireless communication device;
An activation state in which arbitrary data can be wirelessly communicated with the wireless communication terminal in accordance with a predetermined first communication method, and power required for receiving a wireless signal is the first communication method. The wireless communication device in any one of a sleep state in which a start signal can be received in accordance with a second communication method smaller than the wireless communication terminal and wireless communication in accordance with the first communication method cannot be performed with the wireless communication terminal. It is configured to set the state of the communication device.

Furthermore, the wireless communication system includes:
For each of the plurality of wireless communication devices, device load information indicating a device load that is a load of the wireless communication device and a load of a peripheral device that is another wireless communication device located in the vicinity of the wireless communication device. Load information acquisition means for acquiring peripheral load information representing a certain peripheral load;
Based on the acquired device load information and peripheral load information, belonging device change means for changing the belonging device that is the wireless communication device to which the wireless communication terminal belongs,
Is provided.

  A wireless communication method according to another aspect of the present invention is applied to a wireless communication system including a plurality of wireless communication terminals and a plurality of wireless communication devices configured to be able to perform wireless communication with the wireless communication terminals. Is the method.

Further, each of the plurality of wireless communication devices is
Configured to allow wireless communication with a wireless communication terminal belonging to the wireless communication device;
An activation state in which arbitrary data can be wirelessly communicated with the wireless communication terminal in accordance with a predetermined first communication method, and power required for receiving a wireless signal is the first communication method. The wireless communication device in any one of a sleep state in which a start signal can be received in accordance with a second communication method smaller than the wireless communication terminal and wireless communication in accordance with the first communication method cannot be performed with the wireless communication terminal. It is configured to set the state of the communication device.

Furthermore, the wireless communication method includes:
For each of the plurality of wireless communication devices, device load information indicating a device load that is a load of the wireless communication device and a load of a peripheral device that is another wireless communication device located in the vicinity of the wireless communication device. Obtain peripheral load information representing a certain peripheral load,
This is a method of changing an affiliated device, which is the wireless communication device to which the wireless communication terminal belongs, based on the acquired device load information and peripheral load information.

  A wireless communication apparatus according to another aspect of the present invention is an apparatus configured to be able to perform wireless communication with a wireless communication terminal.

Furthermore, this wireless communication device
The wireless communication device is configured to allow wireless communication with a wireless communication terminal belonging to the device itself,
An activation state in which arbitrary data can be wirelessly communicated with the wireless communication terminal in accordance with a predetermined first communication method, and power required for receiving a wireless signal is the first communication method. The sleep signal can be received in accordance with a smaller second communication method and the wireless communication terminal cannot perform wireless communication in accordance with the first communication method. Configured to set the state of the device,
A load for acquiring device load information representing a device load that is a load of the own device and peripheral load information representing a peripheral load that is a load of a peripheral device that is another wireless communication device located in the vicinity of the own device Information acquisition means;
Based on the acquired device load information and peripheral load information, belonging device change means for changing the belonging device that is a wireless communication device to which the wireless communication terminal belongs,
Is provided.

  A wireless communication device control method according to another aspect of the present invention is a method applied to a wireless communication device configured to be able to perform wireless communication with a wireless communication terminal.

Further, the wireless communication device is
The wireless communication device is configured to allow wireless communication with a wireless communication terminal belonging to the device itself,
An activation state in which arbitrary data can be wirelessly communicated with the wireless communication terminal in accordance with a predetermined first communication method, and power required for receiving a wireless signal is the first communication method. The sleep signal can be received in accordance with a smaller second communication method and the wireless communication terminal cannot perform wireless communication in accordance with the first communication method. It is configured to set the state of the device.

Furthermore, the wireless communication device control method includes:
The device load information representing the device load that is the load of the own device, and the peripheral load information representing the peripheral load that is the load of the peripheral device that is another wireless communication device located in the vicinity of the own device,
This is a method of changing an affiliated device, which is a wireless communication device to which the wireless communication terminal belongs, based on the acquired device load information and peripheral load information.

  A wireless communication device control program according to another embodiment of the present invention is a program executed by a wireless communication device configured to be able to execute wireless communication with a wireless communication terminal.

Further, the wireless communication device is
The wireless communication device is configured to allow wireless communication with a wireless communication terminal belonging to the device itself,
An activation state in which arbitrary data can be wirelessly communicated with the wireless communication terminal in accordance with a predetermined first communication method, and power required for receiving a wireless signal is the first communication method. The sleep signal can be received in accordance with a smaller second communication method and the wireless communication terminal cannot perform wireless communication in accordance with the first communication method. It is configured to set the state of the device.

Further, the wireless communication device control program is stored in the wireless communication device.
The device load information representing the device load that is the load of the own device, and the peripheral load information representing the peripheral load that is the load of the peripheral device that is another wireless communication device located in the vicinity of the own device,
A program for executing a process of changing an affiliated device, which is a wireless communication device to which the wireless communication terminal belongs, based on the acquired device load information and peripheral load information.

  By configuring as described above, the present invention can set an appropriate affiliated device according to the load of the wireless communication device for the wireless communication terminal.

It is a figure showing schematic structure of the radio | wireless communications system which concerns on 1st Embodiment of this invention. It is a block diagram showing the structure of the radio | wireless terminal which concerns on 1st Embodiment of this invention. It is a block diagram showing the structure of the wireless base station which concerns on 1st Embodiment of this invention. It is a block diagram showing the structure of the management apparatus which concerns on 1st Embodiment of this invention. It is the figure which showed an example of the peripheral device table which concerns on 1st Embodiment of this invention. It is the figure which showed an example of the apparatus load table which concerns on 1st Embodiment of this invention. It is the figure which showed an example of the attribution terminal table which concerns on 1st Embodiment of this invention. It is the figure which showed an example of the attribution change table which concerns on 1st Embodiment of this invention. It is explanatory drawing which showed notionally the relationship between apparatus load and peripheral load, and change information based on 1st Embodiment of this invention. It is the figure which showed an example of the after-change attribution table which concerns on 1st Embodiment of this invention. It is the sequence diagram which showed the action | operation of the radio | wireless communications system which concerns on 1st Embodiment of this invention. It is a figure showing schematic structure of the radio | wireless communications system which concerns on 2nd Embodiment of this invention. It is a block diagram showing the structure of the wireless base station which concerns on 2nd Embodiment of this invention. It is a figure showing the structure of the radio | wireless communications system which concerns on 3rd Embodiment of this invention.

  Hereinafter, embodiments of a wireless communication system, a wireless communication method, a wireless communication device, a wireless communication device control method, and a wireless communication device control program according to the present invention will be described with reference to FIGS.

<First Embodiment>
(Constitution)
As illustrated in FIG. 1, the wireless communication system 1 according to the first embodiment includes a management device 10, a plurality of wireless base stations (wireless communication devices) 11 to 14, and a plurality of wireless terminals (wireless communication terminals) 101. -106.
The management apparatus 10 and the plurality of radio base stations 11 to 14 are connected to be communicable with each other via a communication cable NC.

  Each of the wireless base stations 11 to 14 is configured to be able to perform wireless communication with the wireless terminals 101 to 106. Specifically, each of the radio base stations 11 to 14 is configured to be able to perform radio communication with the radio terminals 101 to 106 whose distance from the radio base stations 11 to 14 is shorter than a predetermined threshold distance.

  In this example, the wireless base stations 11 to 14 and the wireless terminals 101 to 106 are connected to a wireless LAN (Local Area Network) (for example, IEEE802.11a, IEEE802.11b, IEEE802.11g, IEEE802.11j, or IEEE802.11). 11n etc.).

  The wireless base stations 11 to 14 and the wireless terminals 101 to 106 are a mobile communication network, a short-range wireless communication network (for example, Bluetooth (registered trademark), ZigBee (registered trademark), etc.), WiMAX, IEEE 802. A communication network defined by .11ah, a communication network defined by IEEE 1900.6, or the like may be configured.

  In addition, each of the radio base stations 11 to 14 is also called a base station, Access Point, Base Station, or Node B. Each of the wireless terminals 101 to 106 is also called a wireless terminal or a Station.

  For example, the wireless terminals 101 to 106 are a personal computer, a mobile phone terminal, a PHS (Personal Handyphone System), a PDA (Personal Data Assistance, Personal Digital Assistant), a smartphone, a car navigation terminal, or a game terminal.

  In this example, each of the wireless terminals 101 to 106 is carried by a different user. Accordingly, each of the wireless terminals 101 to 106 moves as the user carrying the wireless terminal moves.

First, the wireless terminals 101 to 106 will be described in more detail.
As illustrated in FIG. 2, the wireless terminal 101 includes a wireless communication unit 201, a communication processing unit 202, and an activation signal generation unit 203. Here, FIG. 2 shows only the part according to the present invention in the configuration of the wireless terminal 101. Note that the wireless terminal 101 may further include a configuration other than the configuration illustrated in FIG. In addition, the wireless terminals 102 to 106 other than the wireless terminal 101 have the same configuration as the wireless terminal 101.

The wireless communication unit 201 includes an antenna. The wireless communication unit 201 transmits and receives wireless signals (transmits and receives) via an antenna.
The communication processing unit 202 executes processing based on reception information represented by the wireless signal received by the wireless communication unit 201. In addition, the communication processing unit 202 generates transmission information and transmits the generated transmission information via the wireless communication unit 201.

  The activation signal generation unit 203 holds terminal identification information for identifying the wireless terminal 101 (that is, unique to the wireless terminal 101) (terminal identification information is set in advance).

  In the activation signal generation unit 203, the state of the belonging device that is the wireless base station 11 to 14 to which the wireless terminal 101 belongs is set to the sleep state (for example, over a period set in advance from the belonging device). If a wireless signal is not received), a predetermined activation (wake-up) signal is generated. The activation signal includes terminal identification information stored in the activation signal generation unit 203. The activation signal generation unit 203 transmits the generated activation signal via the wireless communication unit 201.

  The wireless communication unit 201 performs wireless communication according to the first communication method when transmitting a wireless signal other than the activation signal and when receiving a wireless signal. In this example, the first communication method causes the wireless terminals 101 to 106 to belong to the wireless base stations 11 to 14 (that is, the wireless base stations 11 to 14 accommodate the wireless terminals 101 to 106), and the wireless base station This is a communication method for performing wireless communication between 11-14 and wireless terminals 101-106.

  In this example, the first communication method is a communication method compliant with the wireless LAN standard, such as IEEE 802.11b, IEEE 802.11g, IEEE 802.11a, or IEEE 802.11n. The first communication method may be another communication method such as UWB (Ultra Wide Band) or ZigBee (registered trademark).

  The wireless communication unit 201 performs wireless communication according to the second communication method when transmitting the activation signal. The second communication method is a communication method that requires less power than the first communication method to receive a radio signal.

  In this example, the second communication method is a communication method in which the power required to receive a radio signal is much smaller than that of the first communication method. In this example, the second communication method is, for example, a method in which a change with respect to time of presence / absence of arrival of a wireless signal is communicated as information, as described in Patent Document 1, or a length of a wireless signal (for example, In other words, the communication method can communicate without using a demodulation circuit for demodulating a radio signal, which consumes a relatively large amount of power. The second communication method may be another communication method as long as the amount of power consumed is smaller than that of the first communication method.

Next, the radio base stations 11 to 14 will be described in more detail.
As illustrated in FIG. 3, the radio base station 11 includes a radio communication unit 301, a communication processing unit 302, a wired communication unit 303, a power control unit 304, an attribution information management unit 305, and an activation signal reception unit 306. And a terminal identification information comparison unit 307. The radio base stations 12 to 14 other than the radio base station 11 have the same configuration as the radio base station 11.

  The wireless communication unit 301 is configured to execute wireless communication according to the first communication method. In this example, the wireless communication unit 301 is configured to be able to communicate with each of the wireless terminals 101 to 106.

  Furthermore, every time a preset transmission cycle elapses, the wireless communication unit 301 transmits a beacon signal (Beacon frame) for notifying that wireless communication with the wireless base station 11 is possible. In this example, the beacon signal includes an identifier for identifying the radio base station 11 (for example, ESSID (Extended Service Set Identifier) or BSSID (Basic Service Set Identifier)).

  The wired communication unit 303 is configured to execute wired communication (in this example, communication via the communication cable NC). The wired communication unit 303 is configured to be able to communicate with the management device 10 and each of the other radio base stations 12 to 14.

The communication processing unit 302 executes processing based on the reception information received by the wired communication unit 303.
Further, in the case where a wireless signal is received by the wireless communication unit 301, the communication processing unit 302 has the wireless terminals 101 to 106 that are transmission sources of the wireless signal belong to the wireless base station 11 (own device). When the terminal is a wireless terminal, processing based on the reception information represented by the wireless signal is executed.

  On the other hand, in the case where the wireless signal is received by the wireless communication unit 301, the communication processing unit 302 has the wireless terminals 101 to 106 that are transmission sources of the wireless signal belong to the wireless base station 11 (own device). When not a wireless terminal, the processing based on the reception information represented by the wireless signal is not executed. That is, the radio base station 11 is configured to allow radio communication with the radio terminals 101 to 106 belonging to the own device.

Further, the communication processing unit 302 generates transmission information, and transmits the generated transmission information via the wireless communication unit 301 or the wired communication unit 303.
The radio base station 11 includes two communication units (the radio communication unit 301 and the wired communication unit 303), but may include three or more communication units.

  The activation signal receiving unit 306 is configured to receive an activation signal transmitted by the wireless terminals 101 to 106 and according to the second communication method.

  The power control unit 304 controls power supply to each of the wireless communication unit 301, the communication processing unit 302, the wired communication unit 303, the belonging information management unit 305, the activation signal reception unit 306, and the terminal identification information comparison unit 307. Configured to be possible. The belonging information management unit 305 constitutes a part of the load information acquiring unit and a part of the belonging destination device changing unit.

  When the state of the wireless base station 11 is set to the activated state, the power control unit 304 includes a wireless communication unit 301, a communication processing unit 302, a wired communication unit 303, an attribution information management unit 305, an activation signal receiving unit 306, and The power supply to each of the terminal identification information comparison unit 307 is permitted.

  On the other hand, when the state of the wireless base station 11 is set to the sleep state, the power control unit 304 prohibits the supply of power to the wireless communication unit 301 and the communication processing unit 302, and wired The power supply to each of the communication unit 303, the attribution information management unit 305, the activation signal reception unit 306, and the terminal identification information comparison unit 307 is permitted.

  That is, the activated state is a state in which arbitrary data can be wirelessly communicated with the wireless terminals 101 to 106 in accordance with a predetermined first communication method. In the sleep state, the activation signal can be received according to the second communication method in which the power required to receive the wireless signal is smaller than that of the first communication method, and the wireless terminals 101 to 106 and In this state, wireless communication according to the communication method 1 cannot be executed.

  The belonging information management unit 305 is information (for example, a MAC (Medium Access Control) address) for identifying the wireless terminals 101 to 106 belonging to the wireless base station 11 (own device) (that is, accommodated by the own device). ) Terminal identification information and received signal strength values are stored. The received signal strength value is a value representing the strength of the wireless signal received from the wireless terminals 101 to 106.

  When the wireless terminals 101 to 106 newly belong to the own apparatus, the belonging information management unit 305 newly stores belonging terminal information including terminal identification information for identifying the wireless terminals 101 to 106.

  When the wireless terminals 101 to 106 belonging to the own device no longer belong to the own device (assignment to the own device is canceled), the belonging information management unit 305 The belonging terminal information including the terminal identification information for identifying the wireless terminals 101 to 106 is deleted (erased).

  Further, in this example, the wireless base station 11 determines that the wireless terminals 101 to 106 belong to the own device when a predetermined membership period has elapsed after the wireless terminals 101 to 106 belong to the own device. To release. Therefore, even when the belonging information management unit 305 cancels the belonging of the wireless terminals 101 to 106 to its own device, the terminal identification for identifying the wireless terminals 101 to 106 among the stored belonging terminal information. Delete belonging terminal information including information.

  Further, when the attribution information management unit 305 receives the attribution terminal information transmitted by the management device 10, the attribution information management unit 305 updates the stored attribution terminal information to the received attribution terminal information. In this example, the belonging information management unit 305 first erases all stored belonging terminal information, and then newly stores the received belonging terminal information.

Furthermore, the attribution information management unit 305 acquires device load information representing the device load that is the load of the own device. Here, the load includes an operation rate and a channel utilization rate. The operating rate is the time during which the state of the radio base station 11 is set to the activated state per unit time. The channel utilization rate is the time during which the wireless base station 11 performs wireless communication per unit time. The channel utilization rate may be calculated by the method described in Non-Patent Document 1.
Kaname Fujimoto, 7 others, “Examination of indicators for realizing terminal attribution aggregation in Radio-On-Demand Networks”, IEICE General Conference 2011, B-6-137

  In addition, the attribution information management unit 305 acquires peripheral device information. In this example, the peripheral device information includes peripheral device identification information and a received signal strength value. The peripheral device identification information is information (for example, a MAC address or the like) for identifying peripheral devices that are other radio base stations 12 to 14 located in the vicinity of the own device. The received signal strength value is a value representing the strength of the radio signal received from the peripheral device.

  In this example, when each of the radio base stations 11 to 14 receives a radio signal transmitted by another radio base station 11 to 14 during a preset period, the radio base station 11 to 14 is a radio that is a transmission source of the radio signal. The base stations 11 to 14 are specified as peripheral devices. That is, in this example, the position in the area where wireless communication can be performed with the wireless base stations 11 to 14 as the own device corresponds to the vicinity of the own device.

  Each of the radio base stations 11 to 14 acquires information for identifying the specified peripheral device as the peripheral device identification information. Further, each of the radio base stations 11 to 14 acquires a received signal strength value indicating the strength of the radio signal received from the specified peripheral device.

  Further, the belonging information management unit 305 receives terminal identification information for identifying the wireless terminals 101 to 106 that do not belong to the own apparatus among the wireless terminals 101 to 106 that can perform wireless communication with the own apparatus, and receives the terminal identification information. Non-attached terminal information including the signal strength value is acquired, and the acquired non-attached terminal information is stored. The received signal strength value is a value representing the strength of the wireless signal received from the wireless terminals 101 to 106.

  The belonging information management unit 305 cannot perform wireless communication with the wireless terminals 101 to 106 identified by the stored non-attributing terminal information (that is, the wireless signal transmitted by the wireless terminals 101 to 106 cannot be received). If it becomes, the stored non-attribute terminal information is deleted.

  Further, when the wireless terminals 101 to 106 identified by the stored non-attributing terminal information belong to the own device, the belonging information management unit 305 deletes the stored non-attributing terminal information.

  Furthermore, the belonging information management unit 305 can execute wireless communication with the wireless terminals 101 to 106 other than the wireless terminals 101 to 106 identified by the stored belonging terminal information or non-attaching terminal information (that is, When the wireless signals transmitted from the wireless terminals 101 to 106 can be received), non-assigned terminal information including terminal identification information for identifying the wireless terminals 101 to 106 is newly stored.

  Also, the belonging information management unit 305, when the wireless terminals 101 to 106 identified by the stored belonging terminal information no longer belong to the own device, terminal identification information for identifying the wireless terminals 101 to 106 Non-attached terminal information including is newly stored.

  The attribution information management unit 305 displays the attribution terminal information and the non-association terminal information stored in the attribution information management unit 305, and the acquired device load information and peripheral device information, as a wired communication unit. The data is transmitted to the management apparatus 10 via 303.

  When the activation signal is received by the activation signal reception unit 306, the terminal identification information comparison unit 307 matches the terminal identification information included in the activation signal with any of the belonging terminal information stored in the attribution information management unit 305. It is determined whether or not to do.

  When the activation signal is received by the activation signal receiving unit 306, the terminal identification information comparison unit 307 is configured such that the terminal identification information included in the activation signal is one of the belonging terminal information stored in the attribution information management unit 305. When they match, an activation instruction is output to the power supply control unit 304.

  On the other hand, even when the activation signal is received by the activation signal reception unit 306, the terminal identification information comparison unit 307 includes the attribution information management unit 305 that stores the terminal identification information included in the activation signal. When it does not match any of the terminal information, the activation instruction is not output to the power supply control unit 304.

  In addition, the power supply control unit 304 sets the state of the radio base station 11 to either the activation state or the sleep state.

  Further, the power supply control unit 304 changes the state of the wireless base station 11 to the sleep state when a predetermined sleep condition is satisfied when the state of the wireless base station 11 is set to the activated state. For example, the sleep condition is a condition that communication is not performed between a time point that is a first threshold time set in advance from the current time point and a current time point.

  In addition, when the state of the wireless base station 11 is set to the sleep state, the power supply control unit 304 changes the state of the wireless base station 11 to the activated state when the activation instruction is output by the terminal identification information comparison unit 307. Change to

  In this example, the radio base station 11 includes one antenna connected to each of the radio communication unit 301 and the activation signal reception unit 306. When the state of the wireless base station 11 is set to the activated state, the wireless communication unit 301 transmits and receives wireless signals via the antenna. In addition, the activation signal receiving unit 306 receives the activation signal via the antenna when the state of the radio base station 11 is set to the sleep state.

  Note that the radio base station 11 may include a first antenna connected to the radio communication unit 301 and a second antenna connected to the activation signal reception unit 306.

Next, the management apparatus 10 will be described in more detail.
As illustrated in FIG. 4, the management apparatus 10 includes a wired communication unit 401, an information acquisition unit 402, an information storage unit 403, an attribution destination device determination unit 404, and an attribution terminal information transmission unit 405. Note that the information acquisition unit 402 and the attribution destination device determination unit 404 constitute a part of the load information acquisition unit. In addition, the belonging device determining unit 404 and the belonging terminal information transmitting unit 405 constitute a part of the belonging device changing unit.

  The wired communication unit 401 is configured to execute wired communication (in this example, communication via the communication cable NC). The wired communication unit 401 is configured to be able to communicate with each of the wireless base stations 11 to 14.

  The information acquisition unit 402 receives (acquires) the belonging terminal information, the non-attaching terminal information, the device load information, and the peripheral device information transmitted by the radio base stations 11 to 14 via the wired communication unit 401.

The information storage unit 403 stores attributed terminal information, non-attributed terminal information, device load information, and peripheral device information acquired by the information acquisition unit 402.
In this example, the information storage unit 403 stores the peripheral device table shown in FIG. 5, the device load table shown in FIG. 6, and the attribution terminal table shown in FIG.

  The peripheral device table is a table in which the radio base station ID, the peripheral radio base station ID, and the received signal strength value are associated with each other. That is, the information storage unit 403 includes the wireless base station ID that is device identification information for identifying the wireless base stations 11 to 14 as the transmission source of the peripheral device information, and the peripheral device identification information included in the peripheral device information. A certain peripheral radio base station ID and a received signal strength value included in the peripheral device information are stored in association with each other.

  The device load table is a table in which the radio base station ID, the operation rate, and the channel usage rate are associated with each other. That is, the information storage unit 403 includes a radio base station ID that is device identification information for identifying the radio base stations 11 to 14 as the transmission source of the device load information, an operation rate represented by the device load information, and the device The channel utilization rate represented by the load information is stored in association with each other.

  The belonging terminal table is a table in which the wireless terminal ID, the wireless base station ID, the belonging flag, and the received signal strength value are associated with each other. That is, the information storage unit 403 is a wireless terminal ID that is terminal identification information included in the belonging terminal information, and wireless identification information that is apparatus identification information for identifying the wireless base stations 11 to 14 as the transmission source of the belonging terminal information. The base station ID, the true attribution flag, and the received signal strength value included in the belonging terminal information are stored in association with each other.

  Further, the information storage unit 403 is a device identification information for identifying the wireless terminal ID, which is the terminal identification information included in the unaffiliated terminal information, and the wireless base stations 11 to 14 as the transmission source of the unaffiliated terminal information. A certain radio base station ID, a false attribution flag, and a received signal strength value included in the non-attribute terminal information are stored in association with each other.

  Based on the peripheral device table, the device load table, and the belonging terminal table stored in the information storage unit 403, the belonging device determining unit 404 is based on the radio base stations 11 to 14 to which the radio terminals 101 to 106 belong ( Assigned device).

  In this example, the attribution device determination unit 404 first generates an attribution change table as shown in FIG. The attribution change table is a table in which the radio base station ID and the change information are associated with each other. The change information is information representing dispersion, information representing aggregation, or information representing maintenance.

  That the change information is information indicating dispersion, the attribution of the radio terminals 101 to 106 belonging to the radio base stations 11 to 14 (target device) identified by the radio base station ID associated with the change information Indicates that the destination device is changed to a peripheral device. That the change information is information indicating aggregation indicates that the belonging device of the wireless terminals 101 to 106 belonging to the peripheral device can be changed to the target device. That the change information is information indicating maintenance indicates that the belonging device of the wireless terminals 101 to 106 belonging to the target device is not changed.

  Specifically, first, the belonging device determination unit 404 acquires peripheral load information for each of the plurality of radio base stations 11 to 14. The peripheral load information is information that represents a peripheral load that is a load of a peripheral device that is another wireless base station 11 to 14 that is located in the vicinity of the wireless base stations 11 to 14 (target devices) that are the targets of the peripheral load information. is there. In this example, the peripheral load is a value obtained by averaging the loads of the peripheral devices.

  That is, the belonging device determination unit 404 is associated with the wireless base station ID and the peripheral device table as peripheral load information for the wireless base stations 11 to 14 (target devices) identified by a certain wireless base station ID. Information representing a value obtained by averaging the loads associated with each of the neighboring wireless base station IDs in the device load table is acquired.

  For each of the plurality of radio base stations 11 to 14, the belonging device determination unit 404 uses the device load information and the peripheral load information acquired for the radio base stations 11 to 14 (target devices). Based on this, change information for the target device is acquired.

  In this example, the belonging device determination unit 404 acquires information indicating dispersion as change information when the first condition or the second condition is satisfied. In addition, when the third condition or the fourth condition is satisfied, the belonging device determination unit 404 acquires information indicating aggregation as change information. In addition, when none of the first condition to the fourth condition is satisfied, the belonging device determination unit 404 acquires information indicating maintenance as change information.

  The first condition is that the device load represented by the device load information is larger than the first threshold load set in advance, and the peripheral load represented by the peripheral load information is larger than the second threshold load set in advance. It is a condition that it is small.

  Further, the second condition is that the device load represented by the device load information is smaller than a preset third threshold load, and the device load is smaller than the peripheral load represented by the peripheral load information. It is. Here, the third threshold load is set to a value equal to or less than the first threshold load.

  The third condition is that the device load indicated by the device load information is smaller than the preset fourth threshold load, and the peripheral load indicated by the peripheral load information is the preset fifth threshold load. It is a condition that it is larger than.

  The fourth condition is that the device load represented by the device load information is smaller than a preset sixth threshold load, and the device load is larger than the peripheral load represented by the peripheral load information. It is.

  In this example, the first to sixth threshold loads are set to the same value. Note that the first to sixth threshold loads may be set to different values.

In this example, the change information acquired for the device load L and the peripheral load L _n is as shown in FIG. Here, L _s is a value from the first threshold load to the sixth threshold load.

  Then, the attribution destination device determination unit 404 associates the radio base station ID for identifying the radio base stations 11 to 14 as the target device with the change information acquired for the target device. Generate a table.

  In this example, the belonging device determination unit 404 uses only the operation rate as a load for generating the belonging change table. Note that the belonging device determination unit 404 may use only the channel utilization rate as a load for generating the belonging change table. In addition, the belonging device determination unit 404 may use an operation rate, a weighted average value of channel utilization rates, and the like as a load for generating the belonging change table.

  Next, the belonging device determination unit 404 includes a plurality of wireless terminals 101 to 106 based on the generated belonging change table and the device load table and the belonging terminal table stored in the information storage unit 403. Are assigned to the radio base stations 11 to 14 (belonging device).

  In this example, the affiliated device determination unit 404 determines an affiliated device by executing an affiliated device determination process for each of the plurality of wireless terminals 101 to 106.

  In the belonging device determination process, first, the radio base stations 11 to 14 to which the wireless terminals 101 to 106 (target terminals) that are the targets of the belonging device determination process belong are specified.

  Then, the belonging device determination process acquires change information associated with the identified radio base stations 11 to 14 in the belonging change table. Next, when the acquired change information is information other than information representing dispersion, the belonging device determination process determines the identified radio base stations 11 to 14 as the belonging devices for the target terminal (that is, the belonging device determination process). Do not change the destination device).

  On the other hand, when the acquired change information is information representing dispersion, the belonging device determination process is a peripheral in which the target terminal can execute wireless communication among the peripheral devices for the identified wireless base stations 11 to 14. Extract the device. Further, the belonging device determination process extracts a peripheral device identified by the radio base station ID associated with the change information indicating aggregation and the association change table from the extracted peripheral devices. In the belonging device determination process, one peripheral device is selected from the extracted peripheral devices.

Specifically, the belonging device determination process selects a peripheral device having the highest operating channel availability. The operating channel availability rate is the time obtained by subtracting the time during which the peripheral device is performing wireless communication from the time when the peripheral device state is set to the active state per unit time. is there. That is, the operating channel availability rate _Cr is a value obtained by subtracting the channel usage rate C from the operating rate R.

  According to this, it is possible to reduce the possibility that the time for which the state of the belonging device after the change is set to the activated state becomes long.

Note that the belonging device determination process may be configured to select a peripheral device having the highest channel utilization rate.
According to this, it is possible to increase the possibility that the time during which the state of the wireless communication apparatus is set to the sleep state becomes long.

  In addition, the belonging device determination process may be configured to select one peripheral device based on an operation rate, a value obtained by weighted averaging the channel usage rate, and the like.

  Then, the belonging device determination process determines the selected peripheral device as the belonging device for the target terminal (that is, changes the belonging device).

  Then, the attribution destination device determination unit 404 generates a post-change attribution table. As shown in FIG. 10, the post-change attribution table is a table in which the radio base station ID and the radio terminal ID are associated with each other. Specifically, the belonging device determination unit 404 includes a wireless terminal ID, which is terminal identification information for identifying the target terminal, and device identification information for identifying the belonging device determined for the target terminal. The post-change attribution table is generated by associating the radio base station ID that is.

  The belonging terminal information transmitting unit 405 transmits the belonging terminal information to the wireless base stations 11 to 14 via the wired communication unit 401 based on the changed belonging table generated by the belonging device determining unit 404. Specifically, the belonging terminal information transmission unit 405 transmits the wireless terminal ID associated with the wireless base station ID to the wireless base stations 11 to 14 identified by the wireless base station ID included in the changed attribution table. Including belonging terminal information.

  As described above, the radio base station 11 has, for each of the plurality of radio base stations 11 to 14, device load information indicating the device load that is the load of the radio base stations 11 to 14, and the radio base stations 11 to 11. 14 and the peripheral load information representing the peripheral load that is the load of the peripheral device that is the other radio base stations 11 to 14 located in the vicinity of 14. Furthermore, the radio base station 11 changes the belonging device that is the radio base stations 11 to 14 to which the radio terminals 101 to 106 belong, based on the acquired device load information and peripheral load information.

(Operation)
Next, the operation of the above-described wireless communication system 1 will be described with reference to the sequence diagram shown in FIG. Here, the operations of the management apparatus 10 and the radio base station 11 will be described, but the radio base stations 12 to 14 other than the radio base station 11 also operate in the same manner as the radio base station 11.

  First, the radio base station 11 acquires device load information and peripheral device information (step S101). Then, the radio base station 11 transmits the stored belonging terminal information and non-attaching terminal information, and the acquired device load information and peripheral device information to the management device 10 (step S102). ). In this example, the radio base station 11 executes the processes of step S101 to step S102 every time a preset transmission cycle elapses.

  The management apparatus 10 receives belonging terminal information, non-attaching terminal information, apparatus load information, and peripheral apparatus information transmitted by the radio base station 11. Then, the management device 10 acquires peripheral load information based on the received information, and based on the acquired peripheral load information, device load information, and peripheral device information, as shown in FIG. An attribution change table is generated (step S103).

  Next, the management device 10 creates a wireless base station to which each of the plurality of wireless terminals 101 to 106 belongs based on the generated attribution change table, device load information, belonging terminal information, and non-attaching terminal information. 11 to 14 (attribute device) are determined (step S104).

  And the management apparatus 10 is with respect to each of several radio | wireless terminals 101-106 with respect to the radio | wireless terminal ID which is terminal identification information for identifying the said radio | wireless terminals 101-106, and the said radio | wireless terminals 101-106. By associating with the wireless base station ID, which is the device identification information for identifying the determined belonging device, the changed attribution table is generated as shown in FIG. 10 (step S105).

  Thereafter, the management apparatus 10 transmits to the wireless base stations 11 to 14 identified by the wireless base station ID included in the generated changed attribution table, the belonging terminal including the wireless terminal ID associated with the wireless base station ID. Information is transmitted (step S106).

  Thereby, the radio base station 11 receives the belonging terminal information from the management device 10. The radio base station 11 updates the stored belonging terminal information to the received belonging terminal information (step S107).

  Therefore, at a subsequent time point, when the wireless base station 11 receives the activation signal from the wireless terminals 101 to 106 identified by the received belonging terminal information, the state of the wireless base station 11 is changed from the sleep state to the activated state. change.

  As described above, according to the wireless communication system 1 according to the first embodiment, an appropriate destination device is set for the wireless terminals 101 to 106 according to the load of the wireless base stations 11 to 14. Can do. Thereby, it can prevent that the load of the wireless base stations 11-14 becomes excessive. Moreover, possibility that the time when the state of the wireless base stations 11 to 14 is set to the sleep state becomes long can be increased. As a result, the amount of power consumed by the radio base stations 11 to 14 can be reduced.

  Furthermore, in the wireless communication system 1 according to the first embodiment, when the state is the sleep state, the wireless base stations 11 to 14 activate the state when receiving the activation signal including the stored belonging terminal information. Configured to change to state. Further, the wireless communication system 1 uses, for each of the plurality of wireless base stations 11 to 14, the belonging terminal information stored in the wireless base stations 11 to 14 after the wireless base stations 11 to 14 have changed. The terminal is updated to terminal identification information for identifying the wireless terminals 101 to 106 that are the belonging devices.

  According to this, at the time when the wireless terminals 101 to 106 transmit the activation signal, the changed state of the belonging device can be set to the activated state. Thereby, it can avoid that the state of the wireless base stations 11-14 is set to a starting state uselessly. In addition, the belonging device can be changed without changing the information stored in the wireless terminals 101 to 106. Therefore, the belonging device can be easily changed.

  In addition, in the radio communication system 1 according to the first embodiment, the device load on the radio base stations 11 to 14 is larger than the first threshold load, and the peripheral load on the radio base stations 11 to 14 is the second. When the load is smaller than the threshold load, at least some of the belonging devices of the wireless terminals 101 to 106 belonging to the wireless base stations 11 to 14 are changed to peripheral devices for the wireless base stations 11 to 14.

  According to this, it is possible to avoid an excessive load on the radio base stations 11 to 14. Therefore, it is possible to prevent the quality of radio communication between the radio base stations 11 to 14 and the radio terminals 101 to 106 from being deteriorated.

  Furthermore, in the radio communication system 1 according to the first embodiment, the device load on the radio base stations 11 to 14 is smaller than the third threshold load, and the device load is smaller than the peripheral load on the radio base stations 11 to 14. Is smaller, at least some of the belonging devices of the wireless terminals 101 to 106 belonging to the wireless base stations 11 to 14 are changed to peripheral devices for the wireless base stations 11 to 14.

  According to this, it is possible to increase the possibility that the time for which the state of the radio base stations 11 to 14 is set to the sleep state becomes long. As a result, the amount of power consumed by the radio base stations 11 to 14 can be reduced.

  In addition, in the wireless communication system 1 according to the first embodiment, the device load on the wireless base stations 11 to 14 is smaller than the fourth threshold load, and the peripheral load on the wireless base stations 11 to 14 is the fifth. If the load is larger than the threshold load, at least some of the belonging devices of the wireless terminals 101 to 106 belonging to the peripheral devices for the wireless base stations 11 to 14 are changed to the wireless base stations 11 to 14.

  According to this, it is possible to avoid an excessive load on the peripheral device. Therefore, it is possible to prevent the quality of wireless communication between the peripheral device and the wireless terminals 101 to 106 from being deteriorated.

  Furthermore, in the radio communication system 1 according to the first embodiment, the device load on the radio base stations 11 to 14 is smaller than the sixth threshold load, and the device load is smaller than the peripheral load on the radio base stations 11 to 14. Is larger, at least a part of the belonging devices of the wireless terminals 101 to 106 belonging to the peripheral devices for the wireless base stations 11 to 14 are changed to the wireless base stations 11 to 14.

  According to this, the possibility that the time for which the state of the peripheral device is set to the sleep state becomes long can be increased. As a result, the amount of power consumed by the peripheral device can be reduced.

  The radio communication system 1 according to the first embodiment is configured such that the radio base stations 11 to 14 transmit belonging terminal information and non-belonging terminal information to the management apparatus 10. By the way, in the radio communication system 1 according to the modification of the first embodiment, the radio base stations 11 to 14 do not transmit the belonging terminal information and the non-belonging terminal information, and the radio terminals 101 to 106 belong. Information for identifying the wireless base stations 11 to 14 that are operating, and information for identifying the wireless base stations 11 to 14 that are capable of performing wireless communication and that do not belong to the management apparatus 10 It may be configured.

  In addition, the wireless communication system 1 according to the first embodiment is configured to use the terminal identification information as the belonging terminal information, but information obtained by converting the terminal identification information according to a predetermined method (for example, a hash function or the like) The information converted by (2) may be used as belonging terminal information. In this case, it is preferable that the wireless terminals 101 to 106 are configured to transmit an activation signal including information obtained by converting terminal identification information according to the above method.

The management apparatus 10 according to the modification of the first embodiment calculates the sum of the channel utilization rates of the wireless terminals 101 to 106 belonging to the wireless base stations 11 to 14 by using the channel utilization of the wireless base stations 11 to 14. It may be configured to estimate as a rate. Note that Non-Patent Document 2 discloses that the channel utilization rate of a radio base station is estimated with high accuracy by using this method.
Hideaki Gyoe, 7 others, “Examination of possibility of terminal attribution aggregation in Radio-On-Demand Networks”, IEICE General Conference 2011, B-6-138

  In this case, the management apparatus 10 estimates the channel utilization rate, which is the time during which the assigned device determined for the wireless terminals 101 to 106 performs wireless communication per unit time after the change, and the estimated It is preferred that the channel utilization be configured not to make this change when it is greater than 1 (ie, 100%).

  According to this, it is possible to avoid the channel utilization rate of the belonging device after the change from being excessive.

  Moreover, the management apparatus 10 according to the modification of the first embodiment belongs to the radio base stations 11 to 14 identified by the radio base station IDs associated with the change information indicating dispersion in the attribution change table. Only a part of the wireless terminals 101 to 106 of the wireless terminals 101 to 106 may be configured to change the belonging device. In this case, the management device 10 may randomly select the wireless terminals 101 to 106 whose belonging device is changed.

  According to this, it can avoid that the number of the radio | wireless terminals 101-106 to which an attribute apparatus is changed becomes excessive.

  The radio base station 11 according to the modification of the first embodiment is configured to prohibit the supply of power to the wired communication unit 303 when the state of the radio base station 11 is set to the sleep state. May be. In this case, the wireless base station 11 has a function such as Wake-on-LAN that resumes the supply of power to the wired communication unit 303 when the wired communication unit 303 receives a preset activation signal. It is suitable to be configured.

Second Embodiment
Next, a radio communication system according to the second embodiment of the present invention will be described. The wireless communication system according to the second embodiment is different from the wireless communication system according to the first embodiment in that no management device is provided. Accordingly, the following description will focus on such differences.

  As illustrated in FIG. 12, the wireless communication system 1 according to the second embodiment has a configuration in which the management apparatus 10 is excluded from the wireless communication system 1 according to the first embodiment.

  The radio base station 11 according to the second embodiment has the function of the management apparatus 10 according to the first embodiment in addition to the function of the radio base station 11 according to the first embodiment. In addition, the radio base stations 12 to 14 other than the radio base station 11 according to the second embodiment also have the same functions as the radio base station 11.

  Specifically, as illustrated in FIG. 13, the radio base station 11 according to the second embodiment includes a load information acquisition unit (load information acquisition) in addition to the configuration included in the radio base station 11 according to the first embodiment. Means) 308 and an attribute device change unit (attribute device change means) 309.

  The radio base station 11 is configured to determine a belonging device for each of the wireless terminals 101 to 106 belonging to the own device. That is, the load information acquisition unit 308 acquires device load information for the own device. Furthermore, the load information acquisition unit 308 receives device load information, belonging terminal information, and non-attaching terminal information from each of the peripheral devices for the own device. The load information acquisition unit 308 acquires peripheral load information based on the received device load information.

  The belonging device change unit 309 acquires change information for the own device based on the device load information and the peripheral load information acquired by the load information acquisition unit 308. Furthermore, the belonging device changing unit 309 transmits the acquired change information to the peripheral device and receives change information for the peripheral device from the peripheral device.

  Then, the affiliated device changing unit 309 wirelessly belongs to the own device based on the change information, the belonging terminal information, the non-attaching terminal information, and the device load information for each of the own device and the peripheral device. The belonging apparatus for the terminals 101 to 106 is determined.

  Then, when the belonging device determined for a certain wireless terminal 101 to 106 is a peripheral device, the belonging device changing unit 309 identifies a terminal for identifying the wireless terminal 101 to 106 to the peripheral device. Information is transmitted as belonging terminal information.

  In this way, the wireless communication system 1 according to the second embodiment can operate in the same manner as the wireless communication system 1 according to the first embodiment. As a result, the wireless communication system 1 according to the second embodiment can also exhibit the same operations and effects as the wireless communication system 1 according to the first embodiment.

<Third Embodiment>
Next, a radio communication system according to the third embodiment of the present invention will be described with reference to FIG.
A wireless communication system 1000 according to the third embodiment is a system including a plurality of wireless communication terminals and a plurality of wireless communication devices configured to be able to perform wireless communication with the wireless communication terminals.

Further, each of the plurality of wireless communication devices is
Configured to allow wireless communication with a wireless communication terminal belonging to the wireless communication device;
An activation state in which arbitrary data can be wirelessly communicated with the wireless communication terminal in accordance with a predetermined first communication method, and power required for receiving a wireless signal is the first communication method. The wireless communication device in any one of a sleep state in which a start signal can be received in accordance with a second communication method smaller than the wireless communication terminal and wireless communication in accordance with the first communication method cannot be performed with the wireless communication terminal. It is configured to set the state of the communication device.

Further, the wireless communication system 1000 includes:
For each of the plurality of wireless communication devices, device load information indicating a device load that is a load of the wireless communication device and a load of a peripheral device that is another wireless communication device located in the vicinity of the wireless communication device. A load information acquisition unit (load information acquisition means) 1001 for acquiring peripheral load information representing a certain peripheral load;
Based on the acquired device load information and peripheral load information, an affiliated device changing unit (affiliated device changing means) 1002 for changing the affiliated device that is the wireless communication device to which the wireless communication terminal belongs;
Is provided.

  According to this, it is possible to set an appropriate belonging device according to the load of the wireless communication device for the wireless communication terminal. Thereby, for example, it is possible to prevent an excessive load on the wireless communication device. In addition, for example, it is possible to increase the possibility that the time for which the state of the wireless communication apparatus is set to the sleep state becomes long. As a result, the amount of power consumed by the wireless communication device can be reduced.

  Although the present invention has been described with reference to the above embodiment, the present invention is not limited to the above-described embodiment. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention.

  In each of the above embodiments, the functions of the management apparatus 10, the radio base stations 11 to 14, and the radio terminals 101 to 106 are realized by hardware such as a circuit. Incidentally, each of the management device 10, the wireless base stations 11 to 14, and the wireless terminals 101 to 106 includes a processing device and a storage device that stores a program (software), and the processing device executes the program. By doing so, each function may be realized.

  In this case, the program may be stored in a computer-readable recording medium. For example, the recording medium is a portable medium such as a flexible disk, an optical disk, a magneto-optical disk, and a semiconductor memory.

  In addition, as another modified example of the above-described embodiment, any combination of the above-described embodiments and modified examples may be employed.

<Appendix>
A part or all of the above embodiment can be described as the following supplementary notes, but is not limited thereto.

(Appendix 1)
A wireless communication system comprising a plurality of wireless communication terminals and a plurality of wireless communication devices configured to be able to perform wireless communication with the wireless communication terminals,
Each of the plurality of wireless communication devices is
Configured to allow wireless communication with a wireless communication terminal belonging to the wireless communication device;
The wireless communication terminal is in a state in which arbitrary data can be wirelessly communicated in accordance with a predetermined first communication method, and the power required to receive a wireless signal is the first communication method. The wireless communication device in any one of a sleep state in which a start signal can be received according to a second communication method smaller than the wireless communication terminal and wireless communication according to the first communication method cannot be performed with the wireless communication terminal. Configured to set the state of the communication device,
The wireless communication system includes:
For each of the plurality of wireless communication devices, device load information indicating a device load that is a load of the wireless communication device and a load of a peripheral device that is another wireless communication device located in the vicinity of the wireless communication device. Load information acquisition means for acquiring peripheral load information representing a certain peripheral load;
Based on the acquired device load information and peripheral load information, belonging device change means for changing the belonging device that is the wireless communication device to which the wireless communication terminal belongs,
A wireless communication system comprising:

  According to this, it is possible to set an appropriate belonging device according to the load of the wireless communication device for the wireless communication terminal. Thereby, for example, it is possible to prevent an excessive load on the wireless communication device. In addition, for example, it is possible to increase the possibility that the time for which the state of the wireless communication apparatus is set to the sleep state becomes long. As a result, the amount of power consumed by the wireless communication device can be reduced.

(Appendix 2)
The wireless communication system according to attachment 1, wherein
Each of the plurality of wireless communication devices is
It is configured to store terminal identification information for identifying a wireless communication terminal capable of changing the state of the wireless communication device to the activated state,
When the wireless communication device is in the sleep state and the activation signal including the stored terminal identification information is received, the wireless communication device is configured to change the state to the activated state. ,
Each of the plurality of wireless communication terminals is
Configured to transmit the activation signal including terminal identification information for identifying the wireless communication terminal;
The belonging device changing means is
For each of the plurality of wireless communication devices, the terminal identification information stored in the wireless communication device is updated to terminal identification information for identifying the wireless communication terminal to which the wireless communication device is the affiliated device. A wireless communication system configured to:

  According to this, at the time when the wireless communication terminal transmits the activation signal, the changed state of the belonging device can be set to the activated state. Thereby, it can avoid that the state of a radio | wireless communication apparatus is set to a starting state uselessly. In addition, the belonging device can be changed without changing the information stored in the wireless communication terminal. Therefore, the belonging device can be easily changed.

(Appendix 3)
The wireless communication system according to appendix 1 or appendix 2,
The belonging device changing means is
The device load represented by the device load information acquired for the wireless communication device is larger than a preset first threshold load, and the periphery represented by the peripheral load information acquired for the wireless communication device When the load is smaller than a preset second threshold load, at least a part of the belonging device of the wireless communication terminal belonging to the wireless communication device is changed to a peripheral device for the wireless communication device. A wireless communication system configured as described above.

  According to this, it is possible to avoid an excessive load on the wireless communication device. Therefore, it is possible to prevent the quality of wireless communication between the wireless communication device and the wireless communication terminal from being deteriorated.

(Appendix 4)
A wireless communication system according to any one of appendix 1 to appendix 3,
The belonging device changing means is
The device load represented by the device load information acquired for the wireless communication device is smaller than a preset third threshold load, and the device load is the periphery obtained for the wireless communication device. Wireless communication configured to change at least a part of a destination device of the wireless communication terminal belonging to the wireless communication device to a peripheral device for the wireless communication device when the load information is smaller than the peripheral load represented by the load information system.

  According to this, it is possible to increase the possibility that the time during which the state of the wireless communication apparatus is set to the sleep state becomes long. As a result, the amount of power consumed by the wireless communication device can be reduced.

(Appendix 5)
A wireless communication system according to any one of appendix 1 to appendix 4,
The belonging device changing means is
The device load represented by the device load information acquired for the wireless communication device is smaller than a preset fourth threshold load, and the periphery represented by the peripheral load information acquired for the wireless communication device When the load is larger than a preset fifth threshold load, at least a part of the belonging device of the wireless communication terminal belonging to the peripheral device for the wireless communication device is changed to the wireless communication device. A wireless communication system configured as described above.

  According to this, it is possible to avoid an excessive load on the peripheral device. Therefore, it is possible to prevent the quality of wireless communication between the peripheral device and the wireless communication terminal from being deteriorated.

(Appendix 6)
A wireless communication system according to any one of supplementary notes 1 to 5,
The belonging device changing means is
The device load represented by the device load information acquired for the wireless communication device is smaller than a preset sixth threshold load, and the device load is the periphery obtained for the wireless communication device. Wireless communication configured to change, to the wireless communication device, at least a part of the wireless communication terminal belonging to the peripheral device for the wireless communication device when the load information is greater than the peripheral load represented by the load information system.

  According to this, the possibility that the time for which the state of the peripheral device is set to the sleep state becomes long can be increased. As a result, the amount of power consumed by the peripheral device can be reduced.

(Appendix 7)
The wireless communication system according to any one of supplementary notes 1 to 6,
The said peripheral load is a radio | wireless communications system which is the value which averaged each load of the said peripheral device.

(Appendix 8)
A wireless communication system according to any one of appendix 1 to appendix 7,
The load is an operation rate in which the state of the wireless communication device per unit time is set to the activated state, and a time in which the wireless communication device performs wireless communication per unit time. A wireless communication system including at least one of a channel utilization rate.

(Appendix 9)
The wireless communication system according to any one of appendices 1 to 8,
The belonging device changing means is
Among the peripheral devices, the operating channel is available, which is a time obtained by subtracting the time during which the peripheral device performs wireless communication from the time when the state of the peripheral device per unit time is set to the activated state. A wireless communication system configured to determine a peripheral device having the highest rate as an affiliated device after the change.

  According to this, it is possible to reduce the possibility that the time for which the state of the belonging device after the change is set to the activated state becomes long.

(Appendix 10)
The wireless communication system according to any one of appendices 1 to 8,
The belonging device changing means is
Among the peripheral devices, the peripheral device having the highest channel utilization rate, which is the time during which the peripheral device is performing wireless communication per unit time, is configured to be determined as the changed belonging device. Wireless communication system.

  According to this, it is possible to increase the possibility that the time during which the state of the wireless communication apparatus is set to the sleep state becomes long.

(Appendix 11)
A wireless communication system according to any one of appendices 1 to 10,
The belonging device changing means is
The changed affiliated device is determined, the determined affiliated device estimates a channel usage rate that is a time for performing wireless communication per unit time after the change, and the estimated channel usage rate A wireless communication system configured not to perform the change when is greater than 1.

  According to this, it is possible to avoid the channel utilization rate of the belonging device after the change from being excessive.

(Appendix 12)
The wireless communication system according to any one of appendices 1 to 11,
The affiliated device changing means is a wireless communication system configured to change the affiliated device with respect to some wireless communication terminals of wireless communication terminals belonging to one wireless communication device.

  According to this, it can avoid that the number of the radio | wireless communication terminals to which an attribution destination apparatus is changed becomes excessive.

(Appendix 13)
A wireless communication method applied to a wireless communication system comprising a plurality of wireless communication terminals and a plurality of wireless communication devices configured to be able to perform wireless communication with the wireless communication terminals,
Each of the plurality of wireless communication devices is
Configured to allow wireless communication with a wireless communication terminal belonging to the wireless communication device;
The wireless communication terminal is in a state in which arbitrary data can be wirelessly communicated in accordance with a predetermined first communication method, and the power required to receive a wireless signal is the first communication method. The wireless communication device in any one of a sleep state in which a start signal can be received according to a second communication method smaller than the wireless communication terminal and wireless communication according to the first communication method cannot be performed with the wireless communication terminal. Configured to set the state of the communication device,
The wireless communication method includes:
For each of the plurality of wireless communication devices, device load information indicating a device load that is a load of the wireless communication device and a load of a peripheral device that is another wireless communication device located in the vicinity of the wireless communication device. Obtain peripheral load information representing a certain peripheral load,
A wireless communication method of changing an affiliated device, which is the wireless communication device to which the wireless communication terminal belongs, based on the acquired device load information and peripheral load information.

(Appendix 14)
The wireless communication method according to attachment 13, wherein
Each of the plurality of wireless communication devices is
It is configured to store terminal identification information for identifying a wireless communication terminal capable of changing the state of the wireless communication device to the activated state,
When the wireless communication device is in the sleep state and the activation signal including the stored terminal identification information is received, the wireless communication device is configured to change the state to the activated state. ,
Each of the plurality of wireless communication terminals is
Configured to transmit the activation signal including terminal identification information for identifying the wireless communication terminal;
The wireless communication method includes:
For each of the plurality of wireless communication devices, the terminal identification information stored in the wireless communication device is updated to terminal identification information for identifying the wireless communication terminal to which the wireless communication device is the affiliated device. A wireless communication method.

(Appendix 15)
A wireless communication device configured to execute wireless communication with a wireless communication terminal,
The wireless communication device is configured to allow wireless communication with a wireless communication terminal belonging to the device itself,
The wireless communication terminal is in a state in which arbitrary data can be wirelessly communicated in accordance with a predetermined first communication method, and the power required to receive a wireless signal is the first communication method. The sleep signal can receive an activation signal in accordance with a smaller second communication method and cannot execute wireless communication with the wireless communication terminal in accordance with the first communication method. Configured to set the state of the device,
Load for acquiring device load information representing a device load that is a load of the own device and peripheral load information representing a peripheral load that is a load of a peripheral device that is another wireless communication device located in the vicinity of the own device Information acquisition means;
Based on the acquired device load information and peripheral load information, belonging device change means for changing the belonging device that is a wireless communication device to which the wireless communication terminal belongs;
A wireless communication device comprising:

(Appendix 16)
The wireless communication device according to attachment 15, wherein
It is configured to store terminal identification information for identifying a wireless communication terminal capable of changing the state of the own device to the activated state,
In the case where the state of the own device is the sleep state, the device is configured to change the state of the own device to the activated state when the activation signal including the stored terminal identification information is received.
The belonging device changing means is
A wireless communication apparatus configured to update the stored terminal identification information to terminal identification information for identifying the wireless communication terminal to which the own apparatus is the affiliated apparatus.

(Appendix 17)
A wireless communication device control method applied to a wireless communication device configured to be able to perform wireless communication with a wireless communication terminal,
The wireless communication device
The wireless communication device is configured to allow wireless communication with a wireless communication terminal belonging to the device itself,
The wireless communication terminal is in a state in which arbitrary data can be wirelessly communicated in accordance with a predetermined first communication method, and the power required to receive a wireless signal is the first communication method. The sleep signal can receive an activation signal in accordance with a smaller second communication method and cannot execute wireless communication with the wireless communication terminal in accordance with the first communication method. Configured to set the state of the device,
The wireless communication device control method includes:
The device load information representing the device load that is the load of the own device, and the peripheral load information representing the peripheral load that is the load of the peripheral device that is another wireless communication device located in the vicinity of the own device,
A wireless communication device control method for changing an affiliated device, which is a wireless communication device to which the wireless communication terminal belongs, based on the acquired device load information and peripheral load information.

(Appendix 18)
The wireless communication device control method according to appendix 17,
The wireless communication device
It is configured to store terminal identification information for identifying a wireless communication terminal capable of changing the state of the own device to the activated state,
In the case where the state of the own device is the sleep state, the device is configured to change the state of the own device to the activated state when the activation signal including the stored terminal identification information is received.
The wireless communication device control method includes:
A wireless communication apparatus control method for updating the stored terminal identification information to terminal identification information for identifying a wireless communication terminal to which the own apparatus is the affiliated apparatus.

(Appendix 19)
A wireless communication device control program executed by a wireless communication device configured to be able to perform wireless communication with a wireless communication terminal,
The wireless communication device
The wireless communication device is configured to allow wireless communication with a wireless communication terminal belonging to the device itself,
The wireless communication terminal is in a state in which arbitrary data can be wirelessly communicated in accordance with a predetermined first communication method, and the power required to receive a wireless signal is the first communication method. The sleep signal can receive an activation signal in accordance with a smaller second communication method and cannot execute wireless communication with the wireless communication terminal in accordance with the first communication method. Configured to set the state of the device,
The wireless communication device control program is stored in the wireless communication device.
The device load information representing the device load that is the load of the own device, and the peripheral load information representing the peripheral load that is the load of the peripheral device that is another wireless communication device located in the vicinity of the own device,
A wireless communication device control program for executing processing for changing an affiliated device, which is a wireless communication device to which the wireless communication terminal belongs, based on the acquired device load information and peripheral load information.

(Appendix 20)
A wireless communication device control program according to appendix 19,
The wireless communication device
It is configured to store terminal identification information for identifying a wireless communication terminal capable of changing the state of the own device to the activated state,
In the case where the state of the own device is the sleep state, the device is configured to change the state of the own device to the activated state when the activation signal including the stored terminal identification information is received.
The wireless communication device control program is stored in the wireless communication device.
A wireless communication apparatus control program configured to execute a process of updating the stored terminal identification information to terminal identification information for identifying the wireless communication terminal to which the own apparatus is the affiliated apparatus.

  The present invention can be applied to a wireless communication system including a plurality of wireless communication terminals and a plurality of wireless communication devices configured to be able to perform wireless communication with the wireless communication terminals.

DESCRIPTION OF SYMBOLS 1 Wireless communication system 10 Management apparatus 11-14 Wireless base station 101-106 Wireless terminal 201 Wireless communication part 202 Communication processing part 203 Activation signal generation part 301 Wireless communication part 302 Communication processing part 303 Wired communication part 304 Power supply control part 305 Attribution information Management unit 306 Activation signal reception unit 307 Terminal identification information comparison unit 308 Load information acquisition unit 309 Attribution destination device change unit 401 Wired communication unit 402 Information acquisition unit 403 Information storage unit 404 Attribution destination device determination unit 405 Attribution terminal information transmission unit NC communication Cable 1000 Wireless communication system 1001 Load information acquisition unit 1002 Assigned device change unit

Claims (10)

A wireless communication system comprising a plurality of wireless communication terminals and a plurality of wireless communication devices configured to be able to perform wireless communication with the wireless communication terminals,
Each of the plurality of wireless communication devices is
Configured to allow wireless communication with a wireless communication terminal belonging to the wireless communication device;
The wireless communication terminal is in a state in which arbitrary data can be wirelessly communicated in accordance with a predetermined first communication method, and the power required to receive a wireless signal is the first communication method. The wireless communication device in any one of a sleep state in which a start signal can be received according to a second communication method smaller than the wireless communication terminal and wireless communication according to the first communication method cannot be performed with the wireless communication terminal. Configured to set the state of the communication device,
The wireless communication system includes:
For each of the plurality of wireless communication devices, device load information indicating a device load that is a load of the wireless communication device and a load of a peripheral device that is another wireless communication device located in the vicinity of the wireless communication device. Load information acquisition means for acquiring peripheral load information representing a certain peripheral load;
Based on the acquired device load information and peripheral load information, belonging device change means for changing the belonging device that is the wireless communication device to which the wireless communication terminal belongs,
A wireless communication system comprising: The wireless communication system according to claim 1,
Each of the plurality of wireless communication devices is
It is configured to store terminal identification information for identifying a wireless communication terminal capable of changing the state of the wireless communication device to the activated state,
When the wireless communication device is in the sleep state and the activation signal including the stored terminal identification information is received, the wireless communication device is configured to change the state to the activated state. ,
Each of the plurality of wireless communication terminals is
Configured to transmit the activation signal including terminal identification information for identifying the wireless communication terminal;
The belonging device changing means is
For each of the plurality of wireless communication devices, the terminal identification information stored in the wireless communication device is updated to terminal identification information for identifying the wireless communication terminal to which the wireless communication device is the affiliated device. A wireless communication system configured to: The wireless communication system according to claim 1 or 2,
The belonging device changing means is
The device load represented by the device load information acquired for the wireless communication device is larger than a preset first threshold load, and the periphery represented by the peripheral load information acquired for the wireless communication device When the load is smaller than a preset second threshold load, at least a part of the belonging device of the wireless communication terminal belonging to the wireless communication device is changed to a peripheral device for the wireless communication device. A wireless communication system configured as described above. A wireless communication system according to any one of claims 1 to 3,
The belonging device changing means is
The device load represented by the device load information acquired for the wireless communication device is smaller than a preset third threshold load, and the device load is the periphery obtained for the wireless communication device. Wireless communication configured to change at least a part of a destination device of the wireless communication terminal belonging to the wireless communication device to a peripheral device for the wireless communication device when the load information is smaller than the peripheral load represented by the load information system. A wireless communication system according to any one of claims 1 to 4,
The belonging device changing means is
The device load represented by the device load information acquired for the wireless communication device is smaller than a preset fourth threshold load, and the periphery represented by the peripheral load information acquired for the wireless communication device When the load is larger than a preset fifth threshold load, at least a part of the belonging device of the wireless communication terminal belonging to the peripheral device for the wireless communication device is changed to the wireless communication device. A wireless communication system configured as described above. A wireless communication system according to any one of claims 1 to 5,
The belonging device changing means is
The device load represented by the device load information acquired for the wireless communication device is smaller than a preset sixth threshold load, and the device load is the periphery obtained for the wireless communication device. Wireless communication configured to change, to the wireless communication device, at least a part of the wireless communication terminal belonging to the peripheral device for the wireless communication device when the load information is greater than the peripheral load represented by the load information system. A wireless communication system according to any one of claims 1 to 6,
The said peripheral load is a radio | wireless communications system which is the value which averaged each load of the said peripheral device. A wireless communication system according to any one of claims 1 to 7,
The load is an operation rate in which the state of the wireless communication device per unit time is set to the activated state, and a time in which the wireless communication device performs wireless communication per unit time. A wireless communication system including at least one of a channel utilization rate. A wireless communication method applied to a wireless communication system comprising a plurality of wireless communication terminals and a plurality of wireless communication devices configured to be able to perform wireless communication with the wireless communication terminals,
Each of the plurality of wireless communication devices is
Configured to allow wireless communication with a wireless communication terminal belonging to the wireless communication device;
The wireless communication terminal is in a state in which arbitrary data can be wirelessly communicated in accordance with a predetermined first communication method, and the power required to receive a wireless signal is the first communication method. The wireless communication device in any one of a sleep state in which a start signal can be received according to a second communication method smaller than the wireless communication terminal and wireless communication according to the first communication method cannot be performed with the wireless communication terminal. Configured to set the state of the communication device,
The wireless communication method includes:
For each of the plurality of wireless communication devices, device load information indicating a device load that is a load of the wireless communication device and a load of a peripheral device that is another wireless communication device located in the vicinity of the wireless communication device. Obtain peripheral load information representing a certain peripheral load,
A wireless communication method of changing an affiliated device, which is the wireless communication device to which the wireless communication terminal belongs, based on the acquired device load information and peripheral load information. A wireless communication device configured to execute wireless communication with a wireless communication terminal,
The wireless communication device is configured to allow wireless communication with a wireless communication terminal belonging to the device itself,
The wireless communication terminal is in a state in which arbitrary data can be wirelessly communicated in accordance with a predetermined first communication method, and the power required to receive a wireless signal is the first communication method. The sleep signal can receive an activation signal in accordance with a smaller second communication method and cannot execute wireless communication with the wireless communication terminal in accordance with the first communication method. Configured to set the state of the device,
Load for acquiring device load information representing a device load that is a load of the own device and peripheral load information representing a peripheral load that is a load of a peripheral device that is another wireless communication device located in the vicinity of the own device Information acquisition means;
Based on the acquired device load information and peripheral load information, belonging device change means for changing the belonging device that is a wireless communication device to which the wireless communication terminal belongs;
A wireless communication device comprising:

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