JP2010028729A - Relay device, data processing method thereof, monitoring method, radio communication system and management apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a relay device detecting the movement of an apparatus and having proper maintenability and high reliability, a data processing method thereof, a monitoring method, a radio communication system and a management apparatus. <P>SOLUTION: A small base station 200, which is mobile and capable of relaying radio communication of a radio communication terminal to a portable communication network 3, includes: a reception level acquiring section 216 for monitoring the radio wave state from the other base station 202 positioned around the own station; a determination section 232 for detecting a change in the radio wave state from the other base station 202 positioned therearound and detecting a change in the positional relation between itself and the other base station 202 positioned therearound, on the basis of the detected change in the radio wave state; and a determination section 232 for estimating that the installation place of own station has moved, on the basis of the detected change in the positional relation between itself and the base station 202. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a relay device, a data processing method thereof, a monitoring method, a wireless communication system, and a management device, and more particularly, a movable relay device that relays wireless communication of a wireless communication terminal, a data processing method thereof, a monitoring method, and a wireless communication device. The present invention relates to a communication system and a management device.

  In recent years, a ubiquitous network for connecting various terminals using various communication means such as telephone, electronic mail, and remote conference has been developed for practical use. A wireless LAN system is an indispensable technology for practical use of a ubiquitous network because it can be connected to terminals anywhere and can accommodate a number of terminals with a high degree of freedom without being limited to the number of connection points.

An example of a wireless LAN access point that avoids mutual interference in a wireless LAN system is described in Patent Document 1. Further, Patent Literature 2 discloses an air conditioning management system capable of improving the degree of freedom of the installation location of a sensor device having a wireless communication function and performing appropriate control according to the environment.
JP 2004-180037 A JP-A-6-265191 JP 2000-32069 A Ministry of Internal Affairs and Communications General Communications Base Station, “Handling Policy Regarding Radio Law and Telecommunications Business Law Related Laws for Utilization of Femtocell Base Station”, [online], April 17, 2008, Ministry of Internal Affairs and Communications, Internet < URL: http://www.soumu.go.jp/s-news/2008/pdf/080417_2_bs1.pdf>

  By the way, things that occur daily in the company, such as layout changes in offices and work sites, and movement of people, change the radio wave propagation environment and traffic conditions and affect the communication performance of the wireless LAN. Further, the relay device such as a wireless LAN access point is downsized, and the relay device itself can be easily moved. For this reason, there is a high possibility that the system condition of the wireless LAN will continue to change with the operation, and the communication quality may not be ensured or the communication efficiency may vary with the change.

  A change in the radio wave propagation environment accompanying the movement of the relay device and the layout change can be considered as a change in the positional relationship of the relay device from the viewpoint of radio wave propagation. When the relay device moves, a change in radio wave propagation loss that depends on the physical distance between the relay devices occurs. In addition, changes in the radio wave propagation environment such as layout changes do not involve physical movement of the relay device, but there are changes in the received radio wave level between relay stations, and the positional relationship between the relay devices is equivalent. Equivalent to having changed.

  As described above, in a wireless communication system such as a wireless LAN, it is desired to be managed so as to maintain connectivity that can maintain communication quality in an optimum state while supporting various system conditions that are constantly changing. Also, if the relay device has been moved artificially, it takes time to find it during maintenance and inspection, and the response is delayed, so notification at the time when the movement has occurred is desired. For example, when remotely monitoring a large number of relay devices, there is a problem in that changes in the positional relationship cannot be quickly grasped when the monitoring location and the installation location of the relay device are separated.

  In recent years, small wireless base stations such as mobile phones called so-called femtocell base stations have been developed for practical use. This small radio base station has been studied under a policy that allows an individual user to purchase a device and install it freely indoors in a location where the user has previously reported, so that the radio base station can be opened (non- Patent Document 1). As a result, a mobile phone can be used by using a small radio base station even in the basement where conventional radio waves did not reach.

  When an emergency call such as 110 is made from a wireless communication terminal, a small wireless base is used to identify the location of the base station where the wireless communication terminal is registered so that the location of the emergency call is clear. The station may need to register with the mobile phone carrier for the location address before use. However, when an individual user purchases and installs a small wireless base station, there is a problem that it may be assumed that the address change notification is not surely performed when moving in the future. For this reason, it is desired that the movement of the base station can be detected.

  An object of the present invention is to provide a relay device, a wireless communication system, a management device, a data processing method of the relay device, and a monitoring method that solve the above-described problems.

The relay device of the present invention is a movable relay device that relays wireless communication to a network of wireless communication terminals,
Monitoring means for monitoring a radio wave condition from a relay device located around the own device;
Detection means for detecting a change in the radio wave state from the relay device located in the surroundings and detecting a change in a positional relationship with the relay device located in the surroundings based on the detected change in the radio wave state When,
Estimation means for estimating that the installation location of the own apparatus has moved based on a change in the positional relationship with the detected relay apparatus.

The data processing method of the relay device of the present invention is a data processing method of a movable relay device that relays wireless communication to a network of wireless communication terminals,
The relay device is
Monitor the radio wave condition from the relay device located around the device,
Detecting a change in the radio wave state from the relay device located around, detecting a change in a positional relationship with the relay device located around based on the change,
Based on the detected change in the positional relationship with the relay device, it is estimated that the installation location of the own device has moved.

According to the monitoring method of the present invention, a movable first relay device that relays wireless communication to a network of wireless communication terminals includes:
Monitoring the radio wave condition from the second relay device located around the first relay device;
Detecting a change in the radio wave state from the second relay device, detecting a change in a positional relationship with the second relay device based on the detected change in the radio wave state,
Based on the detected change in the positional relationship with the second relay device, the movement of the installation location of the first relay device is estimated.

The wireless communication system of the present invention includes a movable first relay device that relays wireless communication to a network of wireless communication terminals,
A management device that manages the first relay device on the network and a second relay device located around the first relay device;
Monitoring means for monitoring a radio wave state from the second relay device in the first relay device;
Detecting means for detecting a change in the radio wave state from the second relay device, and detecting a change in a positional relationship with the second relay device based on the detected change in the radio wave state;
Movement estimation means for estimating that the installation location of the first relay device has moved based on the detected positional relationship with the second relay device.

The wireless communication system of the present invention includes a movable first relay device that relays wireless communication to a network of wireless communication terminals,
A management device that manages the first relay device on the network and a second relay device located around the first relay device;
The first relay device
Monitoring means for monitoring a radio wave state from the second relay device;
Detecting means for detecting a change in the radio wave state from the second relay device, and detecting a change in a positional relationship with the second relay device based on the detected change in the radio wave state;
Estimating means for estimating that the installation location of the own device has moved based on the detected change in the positional relationship with the second relay device;
Notification means for notifying a change in the positional relationship with the detected second relay device,
The management device
Receiving means for receiving, from the first relay device, the notification of the detected change in the positional relationship with the second relay device;
Movement determining means for determining movement of the installation location of the first relay device based on the notification received from the first relay device;
An informing means for informing the first relay apparatus determined that the installation location has moved.

The management device of the present invention is a management device that manages a movable first relay device that relays wireless communication to a network of wireless communication terminals, and a second relay device that is located around the first relay device. ,
Receiving means for receiving notification of a change in positional relationship with the second relay device from the first relay device;
Movement determining means for determining movement of the installation location of the first relay device based on the notification received from the first relay device;
An informing means for informing the first relay device determined that the installation location has moved.

The computer program of the present invention is a computer program for causing a computer to realize a movable relay device that relays wireless communication to a network of wireless communication terminals,
Computer
Monitoring means for monitoring a radio wave condition from a relay device located around the own device;
Detecting means for detecting a change in the radio wave state from the relay device located in the surroundings, and detecting a change in a positional relationship with the relay device located in the surroundings based on the change;
Based on the detected change in the positional relationship with the relay device, it is made to function as estimation means for estimating that the installation location of the own device has moved.

A computer program according to the present invention causes a computer to realize a first relay device that relays wireless communication to a network of wireless communication terminals and a management device that manages a second relay device located around the first relay device. A computer program for
Computer
Receiving means for receiving notification of a change in positional relationship with the second relay device from the first relay device;
Movement determining means for determining movement of the installation location of the first relay device based on the notification received from the first relay device;
It is made to function as an alerting means for alerting | reporting the said 1st relay apparatus determined that the said installation place moved.

  It should be noted that any combination of the above-described constituent elements and a conversion of the expression of the present invention between a method, an apparatus, a system, a recording medium, a computer program, etc. are also effective as an aspect of the present invention.

  The various components of the present invention do not necessarily have to be independent of each other. A plurality of components are formed as a single member, and a single component is formed of a plurality of members. It may be that a certain component is a part of another component, a part of a certain component overlaps with a part of another component, or the like.

  In addition, although a plurality of procedures are described in order in the data processing method and the computer program of the present invention, the described order does not limit the order in which the plurality of procedures are executed. For this reason, when implementing the data processing method and computer program of this invention, the order of the several procedure can be changed in the range which does not interfere in content.

  Furthermore, the plurality of procedures of the data processing method and the computer program of the present invention are not limited to being executed at different timings. For this reason, another procedure may occur during the execution of a certain procedure, or some or all of the execution timing of a certain procedure and the execution timing of another procedure may overlap.

  ADVANTAGE OF THE INVENTION According to this invention, the movement of an apparatus can be detected, a maintainability is good, and the reliable relay apparatus, its data processing method, the monitoring method, a radio | wireless communications system, and a management apparatus are provided.

(First embodiment)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are given to the same components, and the description will be omitted as appropriate.

  FIG. 1 is a block diagram showing a configuration of a radio communication system 1 according to an embodiment of the present invention. The wireless communication system 1 of the present embodiment includes a movable first relay device (small base station 200) that relays wireless communication to a mobile communication network 3 that is a network of wireless communication terminals (not shown), and a mobile communication network. 3 and a management device (management server 100) for managing the second small base station 200 and the second relay device (base station 202).

  The network monitoring method in the wireless communication system 1 of the present embodiment is such that a mobile small base station 200 that relays wireless communication to a mobile communication network 3 of a wireless communication terminal is located around the small base station 200. 202 monitors the radio wave state from 202, detects a change in the radio wave state from the base station 202, detects a change in the positional relationship with the base station 202 based on the detected change in the radio wave state, and detects the detected base station Based on the change in the positional relationship with 202, the movement of the installation location of the small base station 200 is estimated.

  Here, the radio wave state includes, for example, the level of radio waves received from the counterpart base station 202, delay distortion, and the like. Delay distortion is distortion that occurs when radio wave propagation paths differ due to reflection or the like and radio waves that have arrival time differences are combined and received. For example, as shown in Patent Document 3, the distortion estimated value can be obtained from a channel impulse response estimated from a cross-correlation between a known preamble signal and an actual received signal. In the present embodiment, a case will be described in which a change in radio wave state is detected based on a received radio wave level such as a received signal level.

  The change in the positional relationship with the base station 202 is, for example, a change in the appearance or disappearance of the base stations 202 around the small base station 200, which will be described later.

  Specifically, the wireless communication system 1 includes a small base station 200 that is permitted to be used in a building 5, a base station 202, a management server 100, a storage device 102, and a management terminal 104.

  In the following drawings, the configuration of parts not related to the essence of the present invention is omitted and is not shown.

  Each component of the wireless communication system 1 includes an arbitrary computer CPU, memory, a program that realizes the components shown in the figure loaded in the memory, a storage unit such as a hard disk that stores the program, and a network connection interface. It is realized by any combination of hardware and software. It will be understood by those skilled in the art that there are various modifications to the implementation method and apparatus. Each figure described below shows functional unit blocks, not hardware unit configurations.

  In the present invention, the wireless communication terminal is, for example, a mobile phone, a PHS (Personal Handyphone System), a wireless LAN (Local Area Network) terminal, a PC (Personal Computer), a PDA (Personal Digital Assistant), or a television receiver that can be connected to the Internet. There is no particular limitation as long as the terminal is a machine, a game machine, or the like and can perform wireless communication and be connected to various networks. Examples of the network include a mobile communication network, a LAN, a WAN (Wide Area Network), and the Internet. The wireless communication terminal of the present invention can wirelessly communicate with a relay device in a use area, such as a mobile phone base station or a wireless LAN access point, and can be connected to a network via the relay device.

  The relay apparatuses (small base station 200 and base station 202) of the present invention can be relay apparatuses corresponding to various networks to which various wireless communication terminals are connected. For example, when the wireless communication terminal is a mobile phone and is connected to a mobile communication network, the small base station 200 is a movable small wireless base station, for example, a so-called femtocell base station, and the base station 202 is an outdoor base station. When the wireless communication terminal is a wireless LAN terminal and is connected to the wireless LAN, the small base station 200 and the base station 202 can be used as a wireless LAN access point.

  FIG. 2 is a functional block diagram showing the configuration of the small base station according to the embodiment of the present invention.

  A relay apparatus (small base station 200) according to an embodiment of the present invention is a movable small base station 200 that relays wireless communication to a mobile communication network 3 of a wireless communication terminal, and is located around the own apparatus. A monitoring unit (reception level acquisition unit 216) that monitors a radio wave state from the base station 202 that detects the change in the radio wave state from the base station 202 located in the vicinity, and based on the detected change in the radio wave state Based on the detected change in the positional relationship between the base station 202 and the detection unit (determination unit 232) that detects a change in the positional relationship with the base station 202 located in And an estimation unit (determination unit 232).

  Specifically, the small base station 200 includes an antenna 210, a radio communication unit 212, a timer 214, a reception level acquisition unit 216, a level storage unit 218, an instruction reception unit 219, and an interface unit (I / F ) 220, list transmission / reception unit 222, list storage unit 224, reference value storage unit 230, determination unit 232, and notification unit 234.

  The wireless communication unit 212 performs wireless communication with a wireless portable terminal (not shown) and the base station 202 via the antenna 210. The timer 214 measures time and notifies a preset time and time interval. In this embodiment, the reception level acquisition unit 216 is notified of radio wave level monitoring timing at predetermined time intervals.

  The reception level acquisition unit 216 monitors the radio wave state received from the other base station 202 received by the wireless communication unit 212 at power-on or at a predetermined monitoring timing notified from the timer 214. The radio wave level is acquired and stored in the level storage unit 218 in association with the identification information of each base station 202 included in the radio wave. The level storage unit 218 stores a radio wave level history received from each base station 202.

  Even when the small base station 200 is turned on or when a management request is received from the management server 100, the reception level acquisition unit 216 searches the surrounding base stations 202, acquires the received radio wave level, and stores the level. Store in the unit 218.

  In addition, when the small base station 200 is powered on, the reception level acquisition unit 216 searches the surrounding base stations 202 to acquire the received radio wave level, the base station 202 having a radio wave level equal to or higher than a predetermined value, or the radio wave level A predetermined number of base stations 202 are created by including them in the base station list in the descending order of strength, and stored in the list storage unit 224.

  Further, the instruction receiving unit 219 receives a monitoring request instruction from the management server 100 via the mobile communication network 3. The reception level acquisition unit 216 monitors the radio wave state from the base station 202 in response to the received monitoring request instruction.

  The interface unit 220 is connected to the mobile communication network 3 and communicates with devices on the mobile communication network 3 such as the management server 100. The list transmission / reception unit 222 transmits the base station list stored in the list storage unit 224 to the management server 100 via the mobile communication network 3.

  Further, the list transmission / reception unit 222 receives the management list of the base station 202 to be monitored from the management server 100 that manages the small base station 200 and the base station 202 on the mobile communication network 3 via the interface unit 220. The list storage unit 224 stores the management list received by the list transmission / reception unit 222. The reception level acquisition unit 216 refers to the list storage unit 224 and monitors the radio wave state of the base station 202 to be monitored included in the management list.

  The small base station 200 of the present embodiment includes a reference storage unit (reference value storage unit 230) that stores a predetermined determination criterion used by the determination unit 232, and the determination unit 232 has a reception radio wave level from the base station 202. It is determined whether or not there is a base station 202 whose received radio wave level has changed from the upper limit to the lower limit of a predetermined criterion. When it is determined that there is a changed base station 202, the base station 202 It is determined that there is a base station 202 whose reception radio wave level has changed from the lower limit of the determination criterion to the upper limit or more, and determined that there is a changed base station 202. At this time, it is determined that the base station 202 has appeared around its own device.

  In the present embodiment, the determination unit 232 refers to the list storage unit 224 and makes a determination based on the radio wave condition of the base station 202 to be monitored included in the management list.

  In the present embodiment, the reception level acquisition unit 216 acquires the reception radio wave level from the base stations 202 located around the device itself, and the level storage unit 218 stores the acquired reception radio wave level history from the base station 202. Remember. The determination unit 232 refers to the history stored in the level storage unit 218 and changes the positional relationship with the surrounding base stations 202 based on the tendency of changes in the received radio wave level from the surrounding base stations 202. Is detected.

  When the determination unit 232 detects a change in the positional relationship with the surrounding base stations 202, the determination unit 232 estimates that the installation location of the own device has moved, and causes the notification unit 234 to notify the movement of the installation location of the own device. Communicate necessary information to

  For example, a calculation unit (not shown) that refers to the history stored in the level storage unit 218, calculates a determination criterion based on the tendency of fluctuations in the received radio wave level of the past base station 202, and stores it in the reference value storage unit 230. ) And can be provided.

  Then, a moving average calculation unit (not shown) that calculates a moving average value over a predetermined period of the received radio wave level from the base station 202 with reference to the history stored in the level storage unit 218 can be provided. 232 can detect a change in the radio wave state based on the calculated moving average value of the received radio wave level.

  When the determination unit 232 detects a change in the radio wave state, the notification unit 234 creates information about the detected base station 202 as notification information and notifies the management server 100 via the interface unit 220. As will be described later, the management server 100 determines the movement of the installation location of the small base station 200 based on the notification information, but this notification information is substantially a notification of the movement of the installation location of the own device.

  As an example, the reception level acquisition unit 216 stores, in the level storage unit 218, only the radio wave level of the base station 202 to be monitored included in the management list among the acquired radio wave levels of the base station 202. For example, the determination unit 232 calculates an average value of the monitoring result of the radio wave level for a predetermined number of times in the past, but is not particularly limited here, and is 5 times here, and determines whether the past average value is within the range of the determination criterion. At the same time, it is determined whether or not the current radio wave level monitoring result is within the range of the determination criterion.

  In this embodiment, when the past average value is lower than the lower limit of the determination criterion, for example, −90 dBm or lower, and the current radio wave level is higher than the upper limit of the determination criterion, for example, −70 dBm or higher, the base station 202 It is determined that it has newly appeared. On the other hand, if the past average value is equal to or higher than the upper limit of the determination criterion, for example, −70 dBm or higher, and the current radio wave level is lower than the lower limit of the determination criterion, for example, −90 dBm or lower, the base station 202 has disappeared. To be judged.

  Then, the notification unit 234 includes the base station 202 determined to appear or disappear and the current received radio wave level in the notification information, and transmits the notification information to the management server 100.

  The small base station 200 according to the present embodiment executes various processing operations corresponding to a computer program installed in a memory (not shown), thereby executing various processing operations as described above. 234 is realized as various functions.

  The computer program of the present embodiment is a computer program for causing a computer (not shown) to realize a movable small base station 200 that relays wireless communication to a mobile communication network 3 of a wireless communication terminal. , Monitoring means (reception level acquisition unit 216) for monitoring the radio wave state from the base station 202 located around its own device, and detecting a change in the radio wave state from the base station 202 located in the surroundings, based on the change Based on the detected change in the positional relationship between the base station 202 and the detecting means (determination unit 232) that detects a change in the positional relationship with the base station 202 located in the vicinity, the installation location of the own apparatus has moved. It is described to function as an estimation unit (determination unit 232) for estimation.

  The management server 100 is a server computer and includes a control unit, a storage unit, a display unit, an operation unit, a communication unit, a voice input / output unit, a print output unit, and the like (not shown). The storage device 102 is connected to the management server 100. The management server 100 stores various data in the storage device 102 and operates by accessing the stored data. Various storage units of the management server 100 described later can be included in the storage device 102.

  The management terminal 104 is not particularly limited, and is, for example, a PC and a user terminal used by a user such as an administrator of the mobile communication network 3. The management terminal 104 includes a control unit, a storage unit, a display unit, an operation unit, a communication unit, a voice input / output unit, a print output unit, and the like (not shown). Various settings such as determination criteria in the management server 100 to be described later can be changed by a user such as a system administrator using the management terminal 104.

FIG. 3 is a functional block diagram showing the configuration of the management server 100 of the wireless communication system 1 of FIG.
The management server 100 of the present embodiment includes a movable first relay device (small base station 200) that relays wireless communication of the wireless communication terminal to the mobile communication network 3, and a second that is located around the small base station 200. A management device (management server 100) that manages the relay device (base station 202), a reception unit (notification information reception unit 160) that receives a notification of a change in the positional relationship with the base station 202 from the small base station 200; Based on the notification received from the small base station 200, a movement determination unit 162 that determines the movement of the installation location of the small base station 200, and a notification unit 164 that notifies the small base station 200 that has been determined that the installation location has moved. And comprising.

  In the present embodiment, the movement of the installation location of the small base station 200 is, for example, not only the movement of the installation location in the same room but also the address of the installation location of the small base station 200 being changed. Includes movement.

  Specifically, the management server 100 includes an interface (I / F) unit 150, a base station list reception unit 152, a management list creation unit 154, a management list storage unit 156, a management list transmission unit 158, a notification An information receiving unit 160, a determination information storage unit 161, a movement determination unit 162, and a notification unit 164 are included.

  The interface unit 150 communicates with the small base station 200 (FIG. 1) and the base station 202 (FIG. 1) via the mobile communication network 3. The base station list receiving unit 152 receives from the small base station 200 a base station list including other surrounding base stations 202 searched by the small base station 200. The management list storage unit 156 stores a management list of the monitoring target small base stations 200 to be monitored by the small base station 200. Based on the base station list, the management list creating unit 154 determines other base stations 202 to be monitored by the small base station 200 and also includes a list including the other base stations 202 to be monitored. The management list created and stored in the management list storage unit 156 is updated. The management list transmission unit 158 transmits the management list stored in the management list storage unit 156 to the small base station 200 via the mobile communication network 3.

  In the present embodiment, for example, when the management list of the small base station 200 does not exist, the base station list transmitted from the small base station 200 is used as the management list. On the other hand, if the management list of the small base station 200 already exists, the information of the base station 202 to be monitored included in the management list of the small base station 200 already stored in the management list storage unit 156 and the new small base station The information of the base station 202 included in the base station list transmitted from the station 200 is compared. When the information of the base stations 202 is different, the management list creation unit 154 creates a management list by adding the base stations 202 newly included in the base station list to the base stations 202 included in the existing management list. To do.

  The notification information receiving unit 160 receives notification information about the movement of the installation location from the small base station 200 via the interface unit 150. In accordance with the notification information received from the small base station 200, for example, the movement determination unit 162 checks whether or not the base station 202 that has appeared or disappeared is included, and if the base station 202 that has appeared or disappeared is included, It is determined that the installation location of the station 200 has moved.

  Also, the management list creating unit 154 adds the base station 202 that has appeared to the management list for the base station 202 whose positional relationship has changed based on the notification received from the small base station 200, and has disappeared. Is removed from the management list.

  In the present embodiment, when the notification information receiving unit 160 receives a notification of the appearance or disappearance of another base station 202, a monitoring request instruction is sent to the small base station 200 via the interface unit 150 so as to monitor the base station 202. To send. And the notification information of the monitoring result of the base station 202 is received from the small base station 200 a predetermined number of times, for example, five times. The received radio wave level of the base station 202 at the time when it is determined to appear or disappear is stored in the determination information storage unit 161 as a reference, and if the radio wave level is within ± 5 dBm of the reference radio wave level for a predetermined number of times, a small size is obtained. It is determined that the base station 200 has moved, and the determination result is output to the notification unit 164.

  Further, after detecting the movement of the small base station 200, the movement determination unit 162 adds the appeared base station 202 to the management list, deletes the lost base station 202 from the management list, and transmits it to the small base station 200. The management list creation unit 154 is instructed to do so.

  The notification unit 164 notifies the movement of the installation location of the small base station 200 according to the determination result of the movement determination unit 162. Or the alerting | reporting part 164 may alert | report the radio wave state of the base station 202 which each small base station 200 is monitoring with the notification of the movement of the installation place of the small base station 200. FIG.

  The notification unit 164 can notify the administrator of the mobile communication network 3 of the movement of the installation location of the small base station 200 to the administrator of the mobile communication network 3 by various means. For example, the notification unit 164 changes the positional relationship on the notification message, the state list of each small base station 200 and the base station 202, and the installation floor drawing on a display unit such as a monitor (not shown) of the management server 100 or the management terminal 104. An icon change of the access point that has been performed may be displayed, or an LED display (not shown) or the like may be lit or blinked. Alternatively, a voice message or an alarm sound may be output from a voice output unit (not shown) connected to the management server 100 or the management terminal 104, or a message or each alarm message may be output to a print output unit such as a printer (not shown). A state list of the small base station 200 may be printed out, or a notification message or a message describing the state of each small base station 200 may be transmitted to a predetermined mail address or terminal (not shown).

  The management server 100 according to the present embodiment executes various processing operations corresponding to a computer program mounted on a memory (not shown), so that the various units 150 to 164 as described above have various functions. It has been realized.

  The computer program of this embodiment is a small base station 200 that relays wireless communication to a mobile communication network 3 of a wireless communication terminal to a computer (not shown), and other base stations 202 located around the small base station 200. , A receiving unit (notification information receiving unit 160) for receiving a notification of a change in the positional relationship with the base station 202 from the computer, and a small base station. Based on the notification received from 200, the movement determination means (movement determination unit 162) for determining the movement of the installation location of the small base station 200, and the notification means for notifying the small base station 200 determined to have moved the installation location (Notification unit 164).

  The operation of the wireless communication system 1 of the present embodiment configured as described above will be described below. FIG. 4 is a flowchart illustrating an example of an operation when the small base station 200 of the wireless communication system 1 of the present embodiment is turned on. Hereinafter, description will be given with reference to FIGS.

  Specifically, first, in the small base station 200, when the power is turned on, the apparatus itself is initialized, and the reception level acquisition unit 216 searches for the surrounding base stations 202 (step S101). Then, the received radio wave level is acquired, a base station 202 having a radio wave level equal to or higher than a predetermined value is included in the base station list, and stored in the list storage unit 224 (step S103). Then, the list transmission / reception unit 222 transmits the base station list stored in the list storage unit 224 to the management server 100 via the interface unit 220 (step S105).

  Thereafter, the list transmission / reception unit 222 receives the management list from the management server 100 (YES in step S107) and stores it in the list storage unit 224 (step S109).

  When the base stations 202 to be monitored are limited in this way, the small base station 200 monitors the monitoring operation. FIG. 5 is a flowchart showing an example of the monitoring operation of the small base station 200 of the wireless communication system 1 of FIG.

  The data processing method of the small base station 200 of this embodiment is a data processing method of the movable small base station 200 that relays wireless communication to the mobile communication network 3 of the wireless communication terminal. The radio wave condition from the base station 202 located around the own device is monitored (step S113), the change in the radio wave condition from the base station 202 located in the surrounding area is detected (step S117), and the radio wave position is determined based on the change. A change in the positional relationship with the base station 202 is detected, and based on the detected change in the positional relationship with the base station 202, it is estimated that the installation location of the own apparatus has moved.

  Specifically, the reception level acquisition unit 216 receives a monitoring timing notification from the timer 214 or a monitoring request instruction from the management server 100 when the instruction receiving unit receives (YES in step S111), A received radio wave level is acquired (step S113). At this time, the reception level acquisition unit 216 refers to the management list in the list storage unit 224, acquires only the radio wave level of the base station 202 to be monitored, and records it in the level storage unit 218 in association with the identification information of each base station 202. Then, the determination unit 232 calculates the average value of the past five times from the radio wave level history (step S115).

  Further, the determination unit 232 distinguishes whether the current radio wave level of each base station 202 and the past average value fluctuation are within a predetermined determination criterion range (step S117). If it is within the range (YES in step S117), the monitoring operation is terminated. On the other hand, if it is out of range (NO in step S117), the notification unit 234 creates notification information (step S119). For example, when the past average value is −90 dBm or less and the current radio wave level is −70 dBm or more, the determination unit 232 determines that the base station 202 has appeared, and the notification unit 234 Appearance and its radio wave level are included in the notification information. Alternatively, when the past average value is −70 dBm or more and the current radio wave level is −90 dBm or less, it is determined that the base station 202 has disappeared, and the notification unit 234 determines the disappearance of the base station 202 and the radio wave level. Create it in the notification information.

  The notification unit 234 transmits the notification information to the management server 100 via the interface unit 220 (step S121).

Next, the operation of the management server 100 of this embodiment will be described below. FIG. 6 is a flowchart showing an example of the operation of the management server 100 of this embodiment. Hereinafter, description will be given with reference to FIGS.
In the management server 100, the base station list receiving unit 152 receives the base station list transmitted from the small base station 200 after the power supply of the small base station 200 is introduced via the interface unit 150 (YES in step S201). Then, the management list creation unit 154 determines the base station 202 to be monitored based on the base station list, creates a management list, and stores it in the management list storage unit 156 (step S203). Then, the management list transmission unit 158 transmits the management list to the small base station 200 via the interface unit 150 (step S205).

  Subsequently, when the notification information receiving unit 160 receives the notification information from the small base station 200 via the interface unit 150 (YES in step S207), the small base station 200 sends a monitoring request instruction to the interface unit 150 a predetermined number of times. (Step S209). Furthermore, the notification information receiving unit 160 sets the radio wave level of the base station 202 that has appeared or disappeared as a determination criterion based on the notification information, and stores it in the determination information storage unit 161 (step S211).

  Notification information is transmitted from the small base station 200 in response to the transmitted monitoring request instruction a predetermined number of times, and the notification information receiving unit 160 receives and determines the radio wave level of the base station 202 that appears or disappears obtained from the notification information. Compare with standards. For example, when the radio wave level is within ± 5 dBm of the criterion (YES in step S213), the movement determination unit 162 determines that the installation location of the small base station 200 has moved (step S215). And the alerting | reporting part 164 alert | reports that the installation place of the small base station 200 moved (step S217). If the radio wave level is not within ± 5 dBm of the criterion (NO in step S213), the process ends.

  As an example, it is assumed that a small base station 200 is first installed in a building 5a as shown in FIG. Here, around the small base station 200, there are a base station 1 and a base station 2 connected to the mobile communication network 3 of the mobile phone. For example, the small base station 200 can be connected to the mobile communication network 3 via the Internet 7 and functions as a base station of the mobile communication network 3.

  The small base station 200 searches for surrounding base stations, receives radio waves from the base station 1 and the base station, creates a base station list, and transmits it to the management server 100. The management server 100 creates a management list including the base stations 1 and 2 as base stations to be monitored and transmits them to the small base station 200. The small base station 200 receives the management list and monitors the base station 202 according to the management list.

  Then, as shown in FIG. 7 (b), when the small base station 200 is moved from the building 5a to another building 5b, the small base station 200 is powered on again. The radio waves of the base station 3 and the base station 4 are received, a base station list is created, and transmitted to the management server 100. The management server 100 newly adds the base station 3 and the base station 4 to the management list and transmits a monitoring request instruction to the small base station 200.

  The small base station 200 receives and updates the management list, monitors the radio wave level of the base station 202 to be monitored in response to the monitoring request, and determines the base station 202 that has appeared or disappeared based on the change. It detects, creates notification information, and transmits to the management server 100. In this case, the base station 1 and the base station 2 disappear, and the management server 100 is notified together with these radio wave levels as the base station 202 in which the base station 3 and the base station 4 appear.

  In the management server 100, the movement determination is performed based on the notification information, the movement of the installation location of the base station 202 is detected, and the notification unit 164 notifies the administrator of the mobile communication network 3 or the like.

  As described above, according to the wireless communication system 1 of the embodiment of the present invention, it is possible to detect the movement of the installation location of the movable small base station 200 with a simple configuration, and the administrator of the mobile communication network 3. Can be notified quickly.

(Second Embodiment)
FIG. 8 is a diagram showing a main configuration of the management server 100 of the wireless communication system 1 according to the embodiment of the present invention. The management server 100 of this embodiment is different from the above embodiment in that a plurality of small base stations 200 and a plurality of other base stations 202 (hereinafter referred to as “base station n”, n = 1) on the mobile communication network 3. 2,..., And n) are monitored, changes in the monitored mutual radio wave conditions are detected, and the positional relationship between the base stations n where the changes are detected fluctuates. It is different in that it has a configuration in which, for example, the mutual base station n determined that the positional relationship has changed is notified to the administrator of the mobile communication network 3.

  Specifically, in addition to the configuration of FIG. 2, the management server 100 includes a signal reception unit 110, a reception data distribution unit 112, and a plurality of base station data processing units 120 ("base station 1 for base station 1 in the figure"). A data processing unit ”, a“ base station 2 data processing unit ”for the base station 2, and a“ base station n data processing unit ”for the base station n), and a determination unit 130.

  The signal receiving unit 110 receives information indicating a mutual radio wave state from a plurality of base stations n on the mobile communication network 3. In this embodiment, data D1 shown in FIG. 9 is transmitted from each base station n as information indicating the mutual radio wave state. FIG. 9 shows an example of the structure of data transmitted from the base station 1.

  The base station 1 ID, which is the identification information of the base station 1, the identification information of the other base stations n (base station 2 to base station n) received by the base station 1, and the identification information of each other base station n Received radio wave level.

  Returning to FIG. 8, the reception data distribution unit 112 transmits the data D1 (FIG. 9) of the reception radio wave level received by the signal reception unit 110 to each base station n (base station 1, base station 2,..., Base Divided into each station n) and distributed to the base station data processing unit 120 corresponding to each base station n.

  Each base station data processing unit 120 calculates data to be used for determining positional variation based on the received radio wave level of each base station n, and outputs the data to the determination unit 130. Each base station data processing unit 120 includes a base station data distribution unit (shown as “base station 1 data distribution unit” for base station 1 in the figure) 122 and base station reception level processing for each other base station n. ("Base station 2 reception level processing unit" for base station 2, "Base station 3 reception level processing unit" for base station 3, and "Base station n reception level processing unit" for base station n And a base station detection unit 126 (shown as “base station 1 output unit” for base station 1 in the figure) 126.

  The base station data distribution unit 122 distributes the received radio wave level of the other base station n to each base station n and distributes it to the base station reception level processing unit 124 corresponding to each other base station n.

  Each base station reception level processing unit 124 calculates data to be used for determining the positional relationship based on the received radio wave level of each base station n, and outputs the data to the base station detection unit 126. The base station reception level processing unit 124 includes, for example, a reference storage unit (not shown) that stores predetermined determination criteria used by the determination unit 130. Then, the base station reception level processing unit 124 detects the base station n whose change in the received radio wave level to be monitored is outside the range of the determination criterion, and outputs the detection result.

  Here, the predetermined determination criterion can be a range of the received radio wave level in a state optimal for the system, for example, a normal received radio wave level ± α dBm. The arrangement reference may be set for each base station n, may be set for each predetermined group, may be unified by the system, and may be handled by an optimum method for each system.

  Furthermore, the base station reception level processing unit 124 stores a history storage unit (not shown) that stores the history of the received radio wave levels of the plurality of base stations n received by the signal reception unit 110 and the history storage unit. A calculation unit (not shown) that refers to the history, calculates a determination criterion based on past changes in the received radio wave level of the base station n, and stores the determination criterion in a reference storage unit;

  Further, the base station reception level processing unit 124 refers to a history stored in the history storage unit, and a moving average calculation unit that calculates a moving average value over a predetermined period of a mutual reception radio wave level of the plurality of base stations n. Have.

  As an example, the base station reception level processing unit 124 includes a plurality of shift registers connected in series with each other, and sequentially inputs the reception radio wave level from the target base station n to the plurality of shift registers. The base station reception level processing unit 124 includes a current data calculation unit (not shown) that calculates an average value of the current received radio wave level, a tendency of the past received radio wave level, for example, an average value (M data) and a standard. A past data calculation unit (not shown) for calculating the deviation (σ).

  The current data calculation unit calculates an average value (average value of M data) of the current received radio wave level from output data of M shift register groups (for example, one hour) from the input side. The past data calculation unit inputs from the M shift register groups that output the received radio wave level for a predetermined period, for example, a predetermined time zone of the past one week, and receives the past received radio wave level average value (M data (Average value) and a standard deviation are calculated. The base station reception level processing unit 124 sets an average value ± 2σ of past received radio wave levels as a determination reference, and stores it in the reference storage unit.

  The base station detection unit 126 integrates the outputs from the respective base station reception level processing units 124 and outputs them to the determination unit 130. In the present embodiment, the base station detection unit 126 detects a change in the mutual radio wave state based on the calculated moving average value of the mutual received radio wave levels.

  That is, the base station detection unit 126 determines that the average value of the current reception radio wave level calculated by the current data calculation unit calculated from the base station reception level processing unit 124 corresponding to each other base station n is set. It is determined whether or not it is within the reference range, and another base station n outside the determination reference range is detected.

  If it is within the range of the criterion, it is determined that there is no change in the received radio wave level, and 0 is set in the flag of the other base station n. If it is outside the range of the criterion, it is determined that the received radio wave level has changed, and 1 is set in the flag of the other base station n.

  The determination unit 130 determines that the positional relationship between the base stations n of the mutual base stations n detected as being out of the range of the determination criteria has changed, and only one of the mutual base station n relay apparatuses Regarding the mutual base stations n detected as being out of the range of the judgment criteria, it is judged that the positional relationship of the mutual base stations n has not changed.

  In the present embodiment, the determination unit 130 calculates the logical product of the flags of the base stations n and determines that the positional relationship has changed when the result is 1, and the positional relationship has changed when the result is 0. Judge that there is no. Then, the determination unit 130 outputs information on the mutual base stations n determined that the positional relationship has changed to the notification unit 164.

  In this embodiment, the alerting | reporting part 164 acquires the information of the base station n from which the mutual positional relationship changed from the determination part 130, and the determination result of the movement of the installation place of the base station n from the movement determination part 162 of the said embodiment. Can be notified by integrating these pieces of information and taking a logical sum, for example.

  The determination result from the determination unit 130 takes time to determine, but is highly accurate. On the other hand, the determination result from the movement determination unit 162 can be quickly determined.

  As described above, in the wireless communication system 1 according to the present embodiment, these two determination results can be determined in an integrated manner, so that a more reliable determination can be made and the reliability of the wireless communication system 1 can be improved. Will also improve.

  As mentioned above, although embodiment of this invention was described with reference to drawings, these are the illustrations of this invention, Various structures other than the above are also employable.

  For example, the monitoring result of the base station 202 from the small base station 200 of the present invention can be used as a received power sensor in a service area defined by the outdoor base station 202. In the management server 100, the received radio wave level of other surrounding base stations 202 reported from the small base station 200 and the registered address of the place where the small base station 200 is installed are mapped, and the area around the small base station 200 is mapped. It becomes possible to grasp the radio wave condition from the outdoor base station 202.

  According to this configuration, it is possible to change the LAN patrol performed by the mobile carrier every day, and the cost for the LAN patrol can be reduced.

It is a block diagram which shows the structure of the radio | wireless communications system which concerns on embodiment of this invention. It is a functional block diagram which shows the structure of the small base station of the radio | wireless communications system of FIG. It is a functional block diagram which shows the structure of the management server of the radio | wireless communications system of FIG. 2 is a flowchart illustrating an example of an operation when a small base station of the wireless communication system of FIG. 1 is turned on. 3 is a flowchart illustrating an example of a monitoring operation of a small base station in the wireless communication system of FIG. 1. 3 is a flowchart illustrating an example of an operation of a management server of the wireless communication system in FIG. 1. It is a figure for demonstrating the operation | movement of the movement detection in the radio | wireless communications system of embodiment of this invention. It is a functional block diagram which shows the principal part structure of the management server of the radio | wireless communications system of embodiment of this invention. It is a figure which shows an example of the structure of the data which the management server of FIG. 8 receives from a base station.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wireless communication system 3 Mobile communication network 5 Building 7 Internet 100 Management server 102 Storage device 104 Management terminal 110 Signal receiving part 112 Reception data distribution part 120 Base station data processing part 122 Base station data distribution part 124 Base station reception level processing part 126 Base station detection unit 130 Determination unit 150 Interface unit 152 Base station list reception unit 154 Management list creation unit 156 Management list storage unit 158 Management list transmission unit 160 Notification information reception unit 161 Determination information storage unit 162 Movement determination unit 164 Notification unit 200 Small size Base station 202 Base station 210 Antenna 212 Wireless communication unit 214 Timer 216 Reception level acquisition unit 218 Level storage unit 219 Instruction reception unit 220 Interface unit 222 List transmission / reception unit 224 List storage unit 230 Reference value storage unit 232 Determination unit 234 Notification section

Claims (25)

A movable relay device that relays wireless communication to a network of wireless communication terminals,
Monitoring means for monitoring a radio wave condition from a relay device located around the own device;
Detection means for detecting a change in the radio wave state from the relay device located in the surroundings and detecting a change in a positional relationship with the relay device located in the surroundings based on the detected change in the radio wave state When,
A relay device comprising: estimation means for estimating that the installation location of the device has moved based on a change in the positional relationship with the detected relay device. The relay device according to claim 1,
The monitoring unit includes an acquisition unit that acquires a reception radio wave level from the relay device located around the device,
A history storage means for storing a history of the received radio wave level from the acquired relay device;
The detection means refers to the history stored in the history storage means, and the position of the relay device located in the vicinity based on a tendency of change in the received radio wave level from the relay device located in the periphery A relay device that detects changes in relationships. The relay device according to claim 2,
Comprising reference storage means for storing a predetermined criterion used by the detection means;
The detection means determines whether there is a relay device in which the change in the received radio wave level from the relay device has changed from the upper limit to the lower limit of the predetermined criterion, and the changed When it is determined that there is a relay device, it is determined that the relay device has disappeared from the surroundings of the own device, or there is a relay device in which the received radio wave level has changed from the lower limit to the upper limit of the determination criterion. A relay device that determines whether or not the relay device has appeared when it is determined that there is a changed relay device. The relay device according to claim 3,
A relay comprising a calculation means for referring to the history stored in the history storage means, calculating the determination criterion based on a tendency of fluctuations in the received radio wave level of the relay device in the past, and storing it in the reference storage means apparatus. The relay device according to any one of claims 1 to 4,
A list receiving means for receiving a management list of relay devices to be monitored from a management device that manages the relay devices on the network;
A list storage means for storing the received management list,
The monitoring unit is a relay device that monitors the radio wave condition of the relay device to be monitored included in the management list with reference to the list storage unit. The relay device according to any one of claims 1 to 5,
The monitoring means is a relay device that monitors the radio wave state from the relay device at a predetermined timing. The relay device according to any one of claims 1 to 6,
Comprising an instruction receiving means for receiving, via the network, a monitoring request instruction from a management apparatus that manages the relay apparatus on the network;
The monitoring device is a relay device that monitors the radio wave state from the relay device in response to the received monitoring request instruction. The relay device according to claim 2,
With reference to the history stored in the history storage means, comprising moving average calculation means for calculating a moving average value over a predetermined period of the received radio wave level from the relay device, respectively,
The detection unit is a relay device that detects a change in the radio wave state based on the calculated moving average value of the received radio wave level. A data processing method for a movable relay device that relays wireless communication to a network of wireless communication terminals,
The relay device is
Monitor the radio wave condition from the relay device located around the device,
Detecting a change in the radio wave state from the relay device located around, detecting a change in a positional relationship with the relay device located around based on the change,
A data processing method for a relay apparatus that estimates that the installation location of the own apparatus has moved based on the detected change in the positional relationship with the relay apparatus. A movable first relay device that relays wireless communication to a network of wireless communication terminals,
Monitoring the radio wave condition from the second relay device located around the first relay device;
Detecting a change in the radio wave state from the second relay device, detecting a change in a positional relationship with the second relay device based on the detected change in the radio wave state,
A monitoring method for estimating movement of an installation location of the first relay device based on a detected change in the positional relationship with the second relay device. A movable first relay device that relays wireless communication to a network of wireless communication terminals;
A management device that manages the first relay device on the network and a second relay device located around the first relay device;
Monitoring means for monitoring a radio wave state from the second relay device in the first relay device;
Detecting means for detecting a change in the radio wave state from the second relay device, and detecting a change in a positional relationship with the second relay device based on the detected change in the radio wave state;
A wireless communication system comprising: movement estimation means that estimates that the installation location of the first relay device has moved based on the detected change in the positional relationship with the second relay device. A movable first relay device that relays wireless communication to a network of wireless communication terminals;
A management device that manages the first relay device on the network and a second relay device located around the first relay device;
The first relay device
Monitoring means for monitoring a radio wave state from the second relay device;
Detecting means for detecting a change in the radio wave state from the second relay device, and detecting a change in a positional relationship with the second relay device based on the detected change in the radio wave state;
Estimating means for estimating that the installation location of the own device has moved based on the detected change in the positional relationship with the second relay device;
Notification means for notifying a change in the positional relationship with the detected second relay device,
The management device
Receiving means for receiving, from the first relay device, the notification of the detected change in the positional relationship with the second relay device;
Movement determining means for determining movement of the installation location of the first relay device based on the notification received from the first relay device;
A radio communication system comprising: an informing means for informing the first relay device that has been determined that the installation location has moved. The wireless communication system according to claim 12,
The monitoring means of the first relay device has an acquisition unit for acquiring a received radio wave level from the second relay device;
The first relay device further includes history storage means for storing a history of the received radio wave level from the acquired second relay device,
The detection unit of the first relay device refers to the history stored in the history storage unit, and based on a tendency of change in the received radio wave level from the second relay device, A wireless communication system for detecting a change in positional relationship. The wireless communication system according to claim 13,
The first relay device includes a reference storage unit that stores a predetermined determination criterion used by the detection unit;
The detection means of the first relay device may be a second relay device in which the received radio wave level changes from the upper limit of the predetermined determination criterion to the lower limit of the change of the received radio wave level from the second relay device. When it is determined that there is the changed second relay device, it is determined that the second relay device has disappeared from the surroundings of the first relay device, or the lower limit of the determination criterion It is determined from the following whether there is a second relay device whose received radio wave level has changed above the upper limit, and when it is determined that there is a second relay device that has changed, the second relay device is the first relay device. A wireless communication system that determines that an appearance has occurred around a relay device. The wireless communication system according to claim 14, wherein
The first relay device refers to the history stored in the history storage unit, calculates the determination criterion based on a tendency of the received radio wave level fluctuation of the second relay device in the past, and stores the criterion storage A wireless communication system comprising calculation means stored in the means. The wireless communication system according to any one of claims 12 to 15,
The first relay device
List receiving means for receiving a management list of the second relay device to be monitored from the management device;
A list storage means for storing the received management list,
The wireless communication system in which the monitoring unit of the first relay device monitors the radio wave state of the second relay device to be monitored included in the management list with reference to the list storage unit. The wireless communication system according to any one of claims 12 to 16,
The wireless communication system, wherein the monitoring unit of the first relay device monitors the radio wave state from the second relay device at a predetermined timing. The wireless communication system according to any one of claims 12 to 17,
The management device
Monitoring request means for transmitting a monitoring request instruction a predetermined number of times at a predetermined timing for instructing the first relay apparatus to monitor the second relay apparatus when the notification is received from the first relay apparatus;
A reference storage unit that acquires a received radio wave level from the second relay device that has changed in the positional relationship included in the notification and stores it as a determination criterion;
The first relay device includes an instruction receiving unit that receives the monitoring request instruction from the management device via the network;
The monitoring means of the first relay device monitors the radio wave state from the second relay device in response to the received monitoring request instruction;
The movement determining means of the management device is a radio that determines that the installation location of the second relay device has moved when it is determined that the received radio wave level is within the determination criterion continuously for the predetermined number of times. Communications system. The wireless communication system according to claim 13,
The first relay device includes a moving average calculation unit that refers to the history stored in the history storage unit and calculates a moving average value over a predetermined period of the received radio wave level from the second relay device,
The wireless communication system, wherein the detection unit of the first relay device detects a change in the radio wave state based on the moving average value of the calculated received radio wave level. A movable first relay device that relays wireless communication to a network of wireless communication terminals, and a management device that manages a second relay device located around the first relay device,
Receiving means for receiving notification of a change in positional relationship with the second relay device from the first relay device;
Based on the notification received from the first relay device, movement determination means for determining the movement of the installation location of the first relay device;
A notification device that notifies the first relay device that has been determined that the installation location has moved. The management device according to claim 20,
Monitoring request means for transmitting a monitoring request instruction a predetermined number of times at a predetermined timing for instructing the first relay apparatus to monitor the second relay apparatus when the notification is received from the first relay apparatus;
A reference storage unit that acquires a received radio wave level from the second relay device that has changed in the positional relationship included in the notification and stores it as a determination criterion;
The movement determining means determines that the installation location of the second relay apparatus has moved when it is determined that the received radio wave level is within the determination criterion continuously for the predetermined number of times.
Management device. The management device according to claim 21, wherein
List receiving means for receiving, from the first relay device, an information list of surrounding second relay devices searched by the first relay device;
List storage means for storing a management list of the second relay device to be monitored, which is to be monitored by the first relay device;
A determination unit that determines a second relay device to be monitored by the first relay device based on the information list;
A management list creating means for creating a list including the determined second relay device to be monitored and updating the management list stored in the list storage means;
A management device comprising: a list transmission unit that transmits the management list stored in the list storage unit to the first relay device via the network. The management device according to claim 22,
Based on the notification received from the first relay device, the second relay device that has appeared in the positional relationship has been added to the management list and the second relay device that has disappeared is added to the management list. A management device comprising management list update means for deleting from the management list. A computer program for causing a computer to realize a movable relay device that relays wireless communication to a network of wireless communication terminals,
Computer
Monitoring means for monitoring a radio wave condition from a relay device located around the own device;
Detecting means for detecting a change in the radio wave state from the relay device located in the surroundings, and detecting a change in a positional relationship with the relay device located in the surroundings based on the change;
A computer program for functioning as an estimation unit that estimates that the installation location of the own device has moved based on a change in the positional relationship with the detected relay device. A computer program for causing a computer to realize a first relay device that relays wireless communication to a network of wireless communication terminals and a management device that manages a second relay device located around the first relay device. ,
Computer
Receiving means for receiving notification of a change in positional relationship with the second relay device from the first relay device;
Based on the notification received from the first relay device, movement determination means for determining the movement of the installation location of the first relay device;
A computer program for functioning as notifying means for notifying the first relay device determined that the installation location has moved.

Images