JP2008042661A - Base station, and base station controlling method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To acquire information on the base station for a theft which is set under the situation where a power supply is not re-switched on. <P>SOLUTION: There are provided: an internal electrical power source; an acquisition means for acquiring base station information on circumferential base stations; a detection means for detecting the change of the base station information; a power supply monitor means for supervising an external power supply; a switching means to be changed to the internal electrical power source when the external power supply is disconnected; and a notice control means for notifying information on its own base station to the circumferential base stations when the change of the base station information is detected after changing to the internal electrical power source. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

 The present invention relates to a base station and a base station control method.

For example, Patent Literature 1 below discloses a wireless communication system and a base station security method that prevent use of a wireless base station when the wireless base station is stolen and moved without permission. The technique of this patent document 1 performs the activation control of its own base station only when the radio base station makes an activation permission request to the higher-level control device and receives the activation permission signal from the control device when the power is turned on again. To do. At this time, if the control device receives an activation permission request from the wireless base station at an unexpected time (that is, after theft), the control device prevents unauthorized use of the wireless base station after theft by not transmitting an activation permission signal. To do.
JP 2005-159783 A

 By the way, in the above prior art, an operation for preventing unauthorized use is started when the base station targeted for theft is turned on again. In addition, there is a case for the purpose of money exchange, and the power is not always turned on again. In such a situation where the power is not turned on again, the conventional technology cannot be applied. Therefore, the base station does not operate in a situation where the power is not turned on again for the theft-target base station, and thus information on the theft-target base station (base station ID, position information, etc.) could not be acquired.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to acquire information on a theft target base station placed in a situation where power is not turned on again.

 In order to achieve the above object, in the present invention, as a first solving means related to a base station, an internal power source, an acquisition means for acquiring base station information of neighboring base stations, and a change in the base station information are detected. Detecting means; power monitoring means for monitoring an external power supply; switching means for switching to the internal power supply when the external power supply is disconnected; and a change in the base station information detected after switching to the internal power supply. In this case, the information processing apparatus includes notification control means for notifying information of the base station to neighboring base stations.

 In the present invention, as the second solving means relating to the base station, in the first solving means, the notification control means is theft information indicating that the information has been stolen as the information of the own base station or / and the own station. The base station location information is notified to neighboring base stations.

 Further, in the present invention, as the third solving means relating to the base station, in the first or second solving means, the base station information is a base station ID, and the notification control means When it is detected that at least one of base station IDs has disappeared, the base station information is notified to neighboring base stations.

 Further, in the present invention, as a fourth solving means related to the base station, a power supply monitoring means for monitoring an external power supply, a radio wave intensity monitoring means for monitoring the radio field intensity of a surrounding base station, and an abnormality in which the radio wave intensity greatly varies Anomaly detection means for detecting a peripheral base station, an acquisition means for acquiring base station information of the abnormal peripheral base station, and a change in base station information of the abnormal peripheral base station was detected when the external power source was used. A notification control means for notifying information on the abnormal peripheral base station to other peripheral base stations.

 On the other hand, in the present invention, as a first solving means related to the base station control method, a first step of monitoring an external power supply, a second step of switching to an internal power supply when the external power supply is cut off, After switching to the power source, when a third step of acquiring base station information of neighboring base stations, a fourth step of detecting a change in the base station information, and a change in the base station information are detected, And a fifth step of notifying the neighboring base station of the above information.

 Further, in the present invention, as a second solving means related to the base station control method, a first step of monitoring the external power supply, a second step of monitoring the radio field intensity of the surrounding base station when using the external power supply, A third step of detecting an abnormal peripheral base station in which the radio field intensity varies greatly; a fourth step of acquiring base station information of the abnormal peripheral base station; and a change in base station information of the abnormal peripheral base station is detected. A fifth step of notifying other peripheral base stations of the information on the abnormal peripheral base station.

  According to the present invention, by switching to an internal power supply when the external power supply is cut off, even if the base station is stolen and the power supply is not turned on again, information on the own base station is transmitted to the neighboring base stations. Therefore, it is possible to acquire information on the theft target base station.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a configuration block diagram of a base station 10 according to the embodiment of the present invention. As shown in this figure, the base station 10 includes a normal communication radio unit 1, a network interface 2, a normal communication control unit 3, a power supply circuit 4, a battery (internal power supply) 5, a charging circuit 6, a discharge circuit 7, and a theft notification radio. Unit 8 and a theft notification control unit (acquisition means, detection means, power supply monitoring means, switching means, notification control means) 9. In FIG. 1, reference numeral 20 denotes a base control station that centrally manages and controls the base station 10 and a plurality of other base stations (not shown). In addition to being connected to a public network 30 including a telephone line network and an IP network, it is connected to the base station 10 via the network interface 2.

 The normal communication wireless unit 1 uses a predetermined communication method, for example, a CDMA (Code Division Multiple Access) method, etc. under the control of the normal communication control unit 3 to communicate with a wireless communication terminal (not shown) such as a mobile phone. Wireless communication related to various data signals such as voice signals and e-mails is performed. The network interface 2 outputs a signal received from the public network 30 to the normal communication control unit 3 and transmits a signal input from the normal communication control unit 3 to the public network 30. The normal communication control unit 3 controls the normal operation of the base station 10 based on the communication state of the normal communication radio unit 1 and the signal input from the network interface 2. Here, the normal operation refers to transmission / reception of various data signals such as voice signals and e-mails with other base stations (peripheral base stations), wireless communication terminals, base control station 20, public network 30, and the like.

 The power supply circuit 4 converts AC power supplied from a power transmission line 40 (external power supply) provided outside into a predetermined DC voltage, and supplies power to each part in the base station 10. The battery 5 is, for example, a lead battery or a lithium ion battery, and stores DC power supplied from the power supply circuit 4 via the charging circuit 6, while the theft notification radio unit 8 and the theft notification control unit via the discharge circuit 7. DC power is supplied to 9. The charging circuit 6 charges the battery 5 with DC power supplied from the power supply circuit 4 under the control of the theft notification control unit 9. The discharge circuit 7 discharges (supplies) the DC power stored in the battery 5 to the theft notification radio unit 8 and the theft notification control unit 9 under the control of the theft notification control unit 9.

  The theft notification wireless unit 8 performs wireless communication related to theft notification with neighboring base stations under the control of the theft notification control unit 9. The theft notification control unit 9 controls the charging circuit 6 to charge the battery 5 when receiving power supply from the power supply circuit 4. Further, the theft notification control unit 9 monitors the power supply from the power supply circuit 4 (that is, the external power supply), and when the power supply from the power supply circuit 4 is stopped (when the external power supply is cut off), the discharge circuit 7 Is supplied from the battery 5 to the theft notification wireless unit 8 and the theft notification control unit 9 (switched to the internal power source), and the theft notification wireless unit 8 is controlled to control base station information (base station ID) of the neighboring base stations. If the base station information changes, the base station determines that the base station has been stolen, identifies the base station location from the base station information of the neighboring base stations, and Transmit station location information to neighboring base stations. The detailed operation of the theft notification control unit 9 will be described later.

  The battery 5 is preferably a lithium ion battery for a small terminal such as a mobile phone, and the theft notification radio unit 8 and the theft notification control unit 9 are also preferably a low power consumption circuit for a small terminal. With such a configuration, an increase in size and cost of the base station 10 can be suppressed as much as possible.

 Next, the operation of the base station 10 configured as described above, particularly the operation of the theft notification control unit 9, will be described with reference to the flowchart of FIG.

 As shown in FIG. 2, during normal operation of the base station 10 and the peripheral base station, the normal communication control unit 3 is driven by being supplied with power from the power supply circuit 4, and the peripheral base station, radio communication terminal, base control station 20, various data signals such as voice signals and e-mails are transmitted / received to / from the public network 30 (step S1). On the other hand, at this time, the theft notification control unit 9 is driven by receiving power supply from the power supply circuit 4, monitors the power supply from the power supply circuit 4, and determines whether or not the power supply from the power supply circuit 4 is stopped ( It is determined whether or not the external power supply has been disconnected (step S2).

 If it is determined in step S2 that the power supply from the power supply circuit 4 has been stopped (“Yes”), the theft notification control unit 9 controls the discharge circuit 7 to control the theft notification radio unit 8 and the theft from the battery 5. Power supply to the notification control unit 9 is started (step S3). That is, when the power supply from the power supply circuit 4 is stopped, the base station 10 may be stolen and forcibly removed from the power transmission line 40, and thus switching to driving by the battery 5 is performed.

  Then, the theft notification control unit 9 shifts to a CCH (Control Channels) reception mode, controls the theft notification radio unit 8 to search for the CCH of the neighboring base station, and includes base stations included in the CCH of the neighboring base station. Information (base station ID, position information, etc.) is acquired, and changes in base station IDs of neighboring base stations are monitored (step S4). Then, the theft notification control unit 9 determines whether or not the base station ID of the neighboring base station has changed (step S5). If the base station ID does not change ("No"), the operation proceeds to step S4. . Here, when at least one of the base station IDs of the neighboring base stations disappears, it is determined that the base station ID of the neighboring base station has changed.

  On the other hand, when the base station ID changes (“Yes”), that is, when the base station 10 moves, the theft notification control unit 9 determines that the own base station has been stolen, and automatically determines from the base station information of the neighboring base stations. The position of the base station is specified, and the base station ID and position information of the base station are transmitted to the neighboring base stations through the free CCH together with the theft notification (step S6).

  If it is determined in step S <b> 2 that the power supply from the power supply circuit 4 has not been stopped (“No”), the theft notification control unit 9 controls the charging circuit 6 to charge the battery 5. (Step S7). Then, the theft notification control unit 9 controls the theft notification radio unit 8 to search the CCH of the neighboring base station, and whether or not there is a large variation in the RSSI (Receive Signal Strength Indication) detection level of the neighboring base station CCH. Is determined (step S8). In step S8, when there is no large change in the RSSI detection level of the neighboring base station (“No”), the theft notification control unit 9 proceeds to the operation of step S1.

  On the other hand, in step S8, when there is a large variation in the RSSI detection level of the neighboring base station (“Yes”), the theft notification control unit 9 determines that the neighboring base station has a large variation in the RSSI detection level. Since there is a possibility that the base station has been moved (stolen), the peripheral base station is recognized as an abnormal peripheral base station, and a change in the base station ID of the peripheral base station including the abnormal peripheral base station is monitored (step) S9). Here, when an abnormal peripheral base station is stolen, only the base station ID of the abnormal peripheral base station cannot be detected among the base station IDs of the peripheral base stations. Therefore, the theft notification control unit 9 determines whether or not the detected base station ID of the neighboring base station has changed (step S10), and if the base station ID of the neighboring base station has not changed ("No"). ), The operation proceeds to step S9. On the other hand, when the base station ID of the neighboring base station changes (“Yes”), that is, when it becomes impossible to detect only the base station ID of the abnormal neighboring base station, the abnormal neighboring base station is determined as the theft target base station. (Step S11).

  Then, the theft notification control unit 9 identifies the position of the theft target base station from the base station information of the own base station, and together with the notification of the theft, the base station ID and the position information of the theft target base station other than the free CCH To the neighboring base stations (step S12).

  As described above, according to the present embodiment, even if the base station 10 is stolen and the power is not turned on again, whether or not the own base station has been stolen by switching to driving with the power supply of the battery 5. Since the base station ID and the position information are transmitted to the neighboring base stations, the base control station 20 can be notified that the base station 10 has been stolen. As a result, the recovery rate of the base stations to be stolen It is possible to improve. Further, according to the present embodiment, it is possible to determine whether not only the base station itself but also the neighboring base station has been stolen. If the neighboring base station is stolen, the base station ID and position information of the neighboring base station Is transmitted to other neighboring base stations, the base control station 20 can be notified that the neighboring base station has been stolen, and the recovery rate when the neighboring base station is stolen can also be improved.

  In the above embodiment, a configuration is adopted in which the normal communication wireless unit 1 and the normal communication control unit 3 that perform normal communication, and the theft notification wireless unit 8 and the theft notification control unit 9 that perform communication related to theft are separately provided. However, if the size and cost of the base station 10 are not limited, a large capacity battery 5 is provided, and the normal communication radio unit 1 and the normal communication control unit 3 that perform normal communication are connected to the theft notification radio unit 8 and the theft notification control unit. Nine functions may be provided.

1 is a configuration block diagram of a base station 10 in an embodiment of the present invention. It is an operation | movement flowchart of the base station 10 in one Embodiment of this invention.

Explanation of symbols

 DESCRIPTION OF SYMBOLS 10 ... Base station, 20 ... Base control station, 30 ... Public network, 40 ... Power transmission line, 1 ... Normal communication radio | wireless part, 2 ... Network interface, 3 ... Normal communication control part, 4 ... Power supply circuit, 5 ... Battery, 6 ... Charging circuit, 7 ... Discharging circuit, 8 ... Theft notification radio unit, 9 ... Theft notification control unit

Claims (6)

An internal power supply,
Acquisition means for acquiring base station information of neighboring base stations;
Detecting means for detecting a change in the base station information;
Power monitoring means for monitoring external power;
Switching means for switching to the internal power supply when the external power supply is disconnected;
After changing to the internal power supply, when a change in the base station information is detected, notification control means for notifying the neighboring base station of the information of the own base station,
A base station comprising:   The base station according to claim 1, wherein the notification control unit notifies the neighboring base stations of theft information indicating that the base station has been stolen or / and position information of the base station as information of the base station. The base station information is a base station ID;
The notification control means notifies the base station information of the base station information when it is detected that at least one of base station IDs of the peripheral base stations has disappeared. 2. The base station described in 2. A first step of monitoring an external power source;
A second step of switching to an internal power source when the external power source is disconnected;
A third step of acquiring base station information of neighboring base stations after switching to the internal power source;
A fourth step of detecting a change in the base station information;
When a change in the base station information is detected, a fifth step of notifying the neighboring base station of information of the own base station;
A base station control method comprising: Power monitoring means for monitoring external power;
Radio field intensity monitoring means for monitoring the radio field intensity of surrounding base stations;
Anomaly detection means for detecting anomalous peripheral base stations in which the radio field intensity varies greatly;
Obtaining means for obtaining base station information of the abnormal peripheral base station;
A notification control means for notifying information on the abnormal peripheral base station to other peripheral base stations when a change in base station information of the abnormal peripheral base station is detected during use of the external power source;
A base station comprising: A first step of monitoring an external power source;
When using an external power supply
A second step of monitoring the radio field strength of neighboring base stations;
A third step of detecting an abnormal peripheral base station in which the radio field intensity varies greatly;
A fourth step of acquiring base station information of the abnormal peripheral base station;
When a change in the base station information of the abnormal peripheral base station is detected, a fifth step of notifying the information of the abnormal peripheral base station to other peripheral base stations;
A base station control method comprising:

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