JP5496589B2 - Small base station, control method, and communication system - Google Patents

Description

  The present invention relates to a small base station, a control method, and a communication system, and more particularly, to a small base station and a control method that can match a usable range of wireless communication with a usable range of broadcasting, and The present invention relates to a communication system.

  In recent years, “femtocells” for covering a narrow range with a radius of several tens of meters, such as in a home or office, as a communicable range have attracted attention.

  "Femtocell" refers to a femtocell base station, which is a base station that outputs radio waves at a level that covers such a narrow range, for indoors with broadband lines such as ADSL (Asymmetric Digital Subscriber Line) lines and optical fiber lines. Built by connecting to the device.

  Unlike the “macro cell”, which is intended for the general public and is a wide cell with a radius of several hundred meters to several kilometers, the “femto cell” is limited to the residents of the house where the femto cell base station is installed. The communication service is provided to the user.

  For example, when a user who is outdoors makes a voice call using a mobile device located in the macro cell, the voice data is transmitted from the macro cell base station covering the macro cell via the radio access network and the core network. Sent to the communicating mobile device.

  On the other hand, when a user who is indoors makes a voice call using a mobile device located in the femtocell, the voice data is output from the femtocell base station to the modem, broadband line, core network, etc. Is transmitted to the mobile device of the communication partner.

  In recent years, portable devices compatible with one-segment broadcasting have become widespread. In one-segment broadcasting, the UHF band of 470 to 710 MHz is divided into 40 channels of 13 to 52 Ch, and the frequency bandwidth of one channel, 6 MHz, is divided into 13 segments. This is a broadcast for mobile devices that is used.

  With the widespread use of one-segment broadcast compatible mobile devices, a system that provides services for users with such one-segment broadcast compatible mobile devices has been proposed or realized. For example, there has been proposed a system that distributes content specialized for a region by suppressing output of radio waves used for one-segment broadcasting (Patent Document 1).

JP 2006-279376 A JP 2007-116391 A JP 2007-140829 A JP 2005-175611 A JP 2002-218528 A

  When wireless communication using femtocells and area one segment broadcasting, which is one segment broadcasting specialized for a region, are combined, it can be used for various purposes.

  For example, let us consider a case in which an area capable of wireless communication using femtocells and receiving area one-segment broadcasting is formed in a store such as a restaurant. Such an area is formed, for example, by installing a device that performs area one-segment broadcasting near the femtocell base station.

  The user views the introduction video of the product provided by area one segment broadcasting using his / her mobile device, and if there is a product of interest, designates the URL (Uniform Resource Locator) provided by the data broadcasting By this, it is possible to access the site where the detailed information of the product is posted via the femtocell.

  For communication using a macro cell and for communication using a femto cell, the latter is often cheaper and provides better communication quality. You can check product information more easily.

  When providing such a service for customers in a store, it is necessary that the range in which wireless communication by femtocell can be used matches the range in which area one-segment broadcasting can be used.

  For example, if you can see an introduction video of a product in area one-segment broadcasting, but you cannot access the product information site via the femtocell from that location, the user must move the location, which is inconvenient .

  The present invention has been made in view of such a situation, and makes it possible to match the range in which wireless communication can be used with the range in which broadcasting can be used.

The small base station of the present invention is different from the communication wave that can be received by the mobile device and communication means for outputting a communication wave for performing communication with a mobile device located in a cell managed by the small base station. Controlling the electric field strength of the radio wave output from the communication means or the broadcast means so that the broadcast means for outputting the broadcast wave using the frequency band matches the reach of the communication wave and the reach of the broadcast wave. Control means.

  A measuring means for measuring the electric field strength of the radio wave output by another base station can be further provided. In this case, the control unit causes the communication unit to control the electric field strength of the communication wave according to the electric field strength of the radio wave output from the other base station, and the arrival of the communication wave after the control is performed. The broadcast means can control the electric field strength of the broadcast wave so as to match the range.

  The measuring means further measures the electric field intensity of a communication wave output from a mobile station located in a cell managed by the measuring means, and the control means further measures the electric field intensity of the communication wave output from the mobile apparatus. Accordingly, the broadcast means can control the electric field strength of the broadcast wave.

  The control means can control the electric field strength of the broadcast wave according to the electric field strength of the communication wave output from the mobile device every time the mobile device is located in a cell managed by the control device. .

The control method according to the present invention includes a communication unit that outputs a communication wave for performing communication with a mobile station located in a cell that it manages, and a frequency different from the communication wave that the mobile station can receive. In a control method for a small base station comprising broadcast means for outputting a broadcast wave using a band, the communication means or the broadcast means outputs so that the reach range of the communication wave matches the reach range of the broadcast wave Controlling the electric field strength of the radio wave to be transmitted.

The communication system of the present invention is a communication system including a small base station and a control device connected via a network. The small base station includes a communication unit that outputs a communication wave for performing communication with a mobile station located in a cell managed by the small base station, and a frequency band different from the communication wave that the mobile station can receive. and broadcasting means for outputting a broadcast wave using the measuring means for measuring the field intensity of radio waves received at the installation location of the small base station communicates with the control device, the size measured by the measuring means Communication means for transmitting information indicating the electric field strength of the radio wave received at the installation position of the base station to the control device, and receiving output information transmitted from the control device, which is information relating to the electric field strength of the radio wave; Based on the output information received by the communication means, the communication means or the electric power output by the broadcast means so as to match the reachable range of the communication wave and the reachable range of the broadcast wave. And control means for controlling the electric field intensity, the control device receives information representing the small base station transmitted from the electric field strength of radio waves received at the installation location of the small base station, receiving Communication means for transmitting the output information, which is information on the electric field strength of the radio wave determined based on the electric field strength represented by the information, to the small base station.

  In the small base station or the communication system of the present invention, the electric field intensity of the radio wave output from the communication means or the broadcast means is controlled so that the reach range of the communication wave and the reach range of the broadcast wave are matched.

  ADVANTAGE OF THE INVENTION According to this invention, the range which can utilize wireless communication, and the range which can utilize broadcast can be made to correspond.

It is a figure which shows the structural example of the communication system which concerns on one Embodiment of this invention. It is a figure which shows the example of provision of a content. It is a sequence explaining the output control processing of the communication system of FIG. It is a sequence explaining the process which readjusts the electric field strength of a broadcast wave. It is a block diagram which shows the structural example of a femtocell base station. It is a block diagram which shows the function structural example of a femtocell base station. It is a block diagram which shows the structural example of a monitoring control apparatus. It is a block diagram which shows the function structural example of a monitoring control apparatus and area one segment broadcast management AS. It is a block diagram which shows the other function structural example of a femtocell base station. 10 is a flowchart for describing output control processing of the femtocell base station of FIG. 9.

<First Embodiment>
[Configuration example of communication system]
FIG. 1 is a diagram illustrating a configuration example of a communication system according to an embodiment of the present invention.

In the example of FIG. 1, a femtocell base station 1 is installed in a building B used as a store, and the femtocell base station 1 forms a femtocell. Range A ₁ in the range of the femtocell indicated by the solid line ellipse.

  The femtocell is a cell that covers a range in the building B in which the femtocell base station 1 is installed, such as a radius of several meters or several tens of meters, which is narrower than a macrocell constituting the public network.

  A modem 3 is connected to the femtocell base station 1 via a LAN (Local Area Network) cable 2. The modem 3 is a home device of the broadband line 4 made up of an ADSL line or an optical fiber line. When the modem function is installed in the femtocell base station 1, the femtocell base station 1 may be directly connected to the broadband line 4.

  The femtocell base station 1 is connected to a network 5 such as the Internet via a LAN cable 2, a modem 3, and a broadband line 4, and performs communication such as voice data performed by a mobile station located in the femtocell. Relay.

  In the example of FIG. 1, a mobile device 21 that is a mobile phone is located in the femtocell. The mobile device 21 transmits and receives various data such as voice data to and from the femtocell base station 1 according to, for example, a CDMA (Code Division Multiple Access) system.

  The femtocell base station 1 has not only a wireless communication function using femtocells but also a function of providing content through one-segment broadcasting. For example, content recorded on a recording medium such as a memory card attached to the femtocell base station 1 or content transmitted from an external device via a network is transmitted from the femtocell base station 1 by one-segment broadcasting. Provided.

  The frequency band used by the femtocell base station 1 for one-segment broadcasting is the same 470-710 MHz band in the UHF band as the one-segment broadcasting of the ISDB-T specification terrestrial digital broadcasting standard. The strength covers a range of several meters to several tens of meters, which is the same as a cell. The electric field strength of the radio wave used by the femtocell base station 1 for one-segment broadcasting is weaker than the electric field strength of the radio wave output from a broadcasting tower or the like for a range such as a radius of several kilometers or several tens of kilometers.

  Hereinafter, the one-segment broadcasting performed by the femtocell base station 1 is referred to as area one-segment broadcasting as appropriate. Of the radio waves output from the femtocell base station 1, a radio wave for forming a femtocell and performing wireless communication is referred to as a communication wave, and a radio wave for performing area one segment broadcasting is referred to as a broadcast wave.

In the example of FIG. 1, Area One-segment broadcasting is being performed range A ₂ shown by the broken line ellipses in the building B as the target. Are shown by shifting the position of the ellipse in Figure 1, in fact, the range A ₁ of femtocell communication wave reaches the range A ₂ which broadcast wave reaches substantially coincides.

  The user of the mobile device 21 within the reach of the radio wave (communication wave and broadcast wave) output from the femtocell base station 1 can communicate with an external device using the femtocell and receive the broadcast wave. You can also use the content. The mobile device 21 is also equipped with a function for receiving one-segment broadcasting.

Although a series of processes will be described later, in the communication system of FIG. 1, the electric field strengths of the communication wave and the broadcast wave are adjusted so that the femtocell range A ₁ and the area one-segment broadcast range A ₂ match. .

  FIG. 2 is a diagram illustrating an example of content provision.

  It is assumed that the femtocell base station 1 is installed in a store such as a restaurant, and a femtocell and an area available for area one segment broadcasting are formed in the store. When entering the store, the mobile device of the user U in FIG. 2 shifts from the macro cell that has been in the service area to the femto cell managed by the femto cell base station 1 and enters the state of being in the femto cell. In-store communication is performed using femtocells, not macrocells.

  A product provided by the femtocell base station 1 as indicated by the tip of arrow # 1 when the user U entering the store turns on the one-segment broadcast reception function of the mobile device and selects a predetermined channel. Advertising content that introduces the video in a video is displayed on the mobile device display.

  That is, the femtocell base station 1 continues to receive the advertisement content transmitted from the server device via the network 5 and provide it by area one segment broadcasting. Further, the femtocell base station 1 continues not only moving image broadcasting but also data broadcasting as area one segment broadcasting.

  When the user U viewing the advertisement content performs an operation to display the contents of the data broadcast, the URL of the coupon distribution site is displayed on the display of the mobile device as indicated by the tip of arrow # 2.

  When operation which accesses a coupon delivery site in the state where URL of a coupon delivery site is displayed, for example, access to a coupon delivery site which a server connected to network 5 manages is performed. Access to the coupon distribution site is performed via the femtocell base station 1, that is, using wireless communication by the femtocell, as indicated by the tip of arrow # 3.

  When accessing the coupon distribution site, the coupon image transmitted from the coupon distribution site is displayed on the display of the mobile device. For example, the user U can receive a discount on the price of the product by showing the image of the coupon to a store clerk.

By range A ₂ in the range A ₁ and Area One segment broadcast femtocells match, the user U, the service as described above that is linked to a wireless communication by Area One-segment broadcast and the femto cell, location It can be used without moving.

  For example, if the range of area one segment broadcasting is formed in the entire store, but the range of femtocell is formed only in a part of the store, depending on the position of the user, the coupon distribution site is accessed. This means that the position has to be moved before, but this can be prevented.

  Returning to the description of FIG. 1, the broadband line 4 is viewed from the femtocell base station 1 side via the network 5, the monitoring and control device 11, the in-zone / out-of-zone management AS (Application Server) 12, and the area A one-segment broadcast management AS 13 is connected.

  The femtocell core network is constructed by the monitoring and control device 11, the located / separated area management AS 12, and the area one segment broadcast management AS 13. The femtocell core network is also provided with a call session control function (CSCF) that is a SIP (Session Initiation Protocol) server having a function as a voice data exchange. Similarly, a macro cell core network made of CSCF or the like is also connected to the femto cell core network.

  The supervisory control device 11 communicates with the femtocell base station 1 via the network 5, the broadband line 4, the modem 3, and the LAN cable 2, and determines the electric field strength of communication waves and broadcast waves output from the femtocell base station 1. Control.

  For example, the supervisory control device 11 determines the electric field strength of the communication wave based on the information on the electric field strength of the radio wave received from the installation position of the femtocell base station 1 transmitted from the femtocell base station 1 that has been successfully authenticated. The femtocell base station 1 is controlled to output the communication wave with the determined intensity.

  Also, the supervisory control device 11 transmits information on the electric field strength of the communication wave output from the femtocell base station 1 to the area one segment broadcast management AS 13 and causes the area one segment broadcast management AS 13 to determine the electric field strength of the broadcast wave. When the information on the field intensity of the broadcast wave is transmitted from the area one segment broadcast management AS 13, the monitoring control device 11 controls the femtocell base station 1 so as to output the broadcast wave with the field intensity.

  The supervisory control device 11 also causes the area one-segment broadcast management AS 13 to recalculate the field intensity of the broadcast wave every time the mobile device is located in the femtocell managed by the femtocell base station 1.

  The located / separated area management AS 12 manages the cell where the mobile device 21 is located based on information transmitted from the femtocell base station 1 when the mobile device is located in the femtocell.

  For example, when the mobile device 21 of FIG. 1 is located in a femtocell managed by the femtocell base station 1, the location information including the identification information of the femtocell base station 1 and the identification information of the mobile device 21 is the femtocell base. It is transmitted from station 1. The located / separated area management AS 12 manages the cell where each mobile device is located by storing the identification information included in the located area information in association with each other.

  The area one segment broadcast management AS 13 determines the electric field strength of the broadcast wave when the information on the electric field strength of the communication wave output from the femtocell base station 1 is transmitted from the monitoring control device 11, and information on the determined electric field strength. Is transmitted to the monitoring control device 11.

  In the area one segment broadcast management AS 13, the electric field strength of the broadcast wave is determined by calculation so that the reach range of the broadcast wave matches the reach range of the communication wave with reference to the electric field strength of the communication wave.

  Since the frequency band of the communication wave and the frequency band of the broadcast wave are different, the reach ranges of the respective radio waves do not match even if output with the same electric field strength. The electric field strength of the broadcast wave determined in the area one segment broadcast management AS 13 is different from the electric field strength of the communication wave.

  In association with each value of the electric field intensity of the communication wave, the value of the electric field intensity of the broadcast wave obtained in advance by calculation may be managed by the area one segment broadcast management AS 13. In this case, in response to the information on the electric field intensity of the communication wave being transmitted from the monitoring control device 11, the value of the electric field intensity of the broadcast wave managed in association with the information is specified by the area one segment broadcast management AS 13, Information representing the value is transmitted to the monitoring control device 11.

[Communication system processing]
With reference to the sequence of FIG. 3, the process of the communication system of FIG. 1 for adjusting the electric field strength of the communication wave output from the femtocell base station 1 and the electric field strength of the broadcast wave will be described. This process is performed by the femtocell base station 1, the monitoring control device 11, and the area one segment broadcast management AS13.

  When the power button provided on the housing is turned on, for example, in step S21, the femtocell base station 1 communicates with the monitoring controller 11 and authenticates itself in step S22. After the activation, the femtocell base station 1 starts outputting communication waves and broadcast waves with, for example, a preset electric field strength.

  In the monitoring control device 11, identification information of valid femtocell base stations is registered in advance. In step S1, the monitoring control device 11 determines whether or not the identification information of the femtocell base station 1 transmitted from the femtocell base station 1 is the same as the registered identification information. Authentication of the femtocell base station 1 is performed.

  If the authentication is successful and this is notified from the supervisory control device 11, in step S23, the femtocell base station 1 determines that another base such as a macrocell base station or a femtocell base station in the vicinity is outside. Measure the electric field strength of the radio wave output from the station.

  In order to prevent interference with radio waves output from other base stations, the electric field strength of communication waves output from the femtocell base station 1 can be adjusted. Before performing the adjustment, the femtocell base station 1 has a function of measuring the electric field strength of the radio wave received at the installation position of the femtocell base station 1, and other base stations output by the function. The electric field strength of the radio wave is measured. The radio wave output from each base station is identified by identification information such as a scrambling code assigned to each base station.

  In step S <b> 24, the femtocell base station 1 transmits measurement information representing the measurement result of the electric field strength of the radio wave output from the other base station to the monitoring control device 11.

  In step S2, the supervisory control device 11 receives the measurement information transmitted from the femtocell base station 1, and in step S3, based on the measurement result, the radio wave received at the installation position of the femtocell base station 1 The electric field strength of the communication wave is determined so as not to cause interference.

  In step S <b> 4, the monitoring control device 11 transmits communication wave output information, which is information indicating the field strength of the determined communication wave, to the femtocell base station 1.

  In step S25, the femtocell base station 1 receives the communication wave output information transmitted from the monitoring control device 11, and in step S26, outputs the communication wave output information with the intensity represented by the communication wave output information. Adjust the electric field strength.

  On the other hand, in step S5, the supervisory control device 11 transmits the communication wave output information transmitted to the femtocell base station 1 to the area one segment broadcast management AS 13 and notifies the strength of the communication wave output from the femtocell base station 1. To do.

  In step S11, the area one segment broadcast management AS 13 receives the communication wave output information transmitted from the monitoring control device 11, and in step S12, broadcasts based on the electric field strength of the communication wave output from the femtocell base station 1. The electric field strength of the wave is obtained by calculation. The required field strength of the broadcast wave is such that the reach of the broadcast wave matches the reach of the communication wave.

  In step S <b> 13, the area one segment broadcast management AS 13 transmits broadcast wave output information, which is information indicating the electric field strength of the broadcast wave obtained by calculation, to the monitoring control device 11.

  In step S6, the supervisory control device 11 receives the broadcast wave output information transmitted from the area one segment broadcast management AS 13, and transmits it to the femtocell base station 1 in step S7.

  In step S27, the femtocell base station 1 receives the broadcast wave output information transmitted from the monitoring control apparatus 11, and in step S28, the femtocell base station 1 outputs the broadcast wave output information with the intensity represented by the broadcast wave output information. Adjust the electric field strength.

  With the above processing, the range in which wireless communication can be used and the range in which area one segment broadcasting can be used can be matched. From the store side, the area one segment as described with reference to FIG. It is possible to provide a service that links broadcasting and femtocell wireless communication. In addition, the user can use the service without moving the position.

  Next, processing of the communication system of FIG. 1 for readjusting the electric field strength of the broadcast wave will be described with reference to the sequence of FIG.

  When a certain mobile station is newly located in the femtocell, the reach of the communication wave output from the femtocell base station 1 changes due to the influence of the radio wave output from the mobile station. There may be a discrepancy between the communication wave reach and the broadcast wave reach. In the communication system of FIG. 1, the electric field strength of the broadcast wave is adjusted again so as to correct the deviation.

  The processing of FIG. 4 is performed after the processing of FIG. 3 is performed, every time the mobile device is located in the femtocell, the femtocell base station 1, the supervisory control device 11, the in-zone / out-of-zone management AS 12, and the area one This is performed by the segment broadcast management AS 13.

  If the mobile device 21 is located in the femtocell managed by the femtocell base station 1, the mobile device 21 accesses the femtocell base station 1 and transmits a location registration request to the femtocell base station 1 in step S81. . The location registration request includes identification information of the mobile device 21.

  In step S71, the femtocell base station 1 receives a location registration request from the mobile device 21. In step S72, the femtocell base station 1 obtains location information including the identification information of the mobile device 21 and its own identification information. It transmits to management AS12.

  In step S51, the located area / separated area management AS 12 receives the area information transmitted from the femtocell base station 1, and stores the identification information included in the area information in association with each other, thereby storing the area information. It manages that the mobile station 21 is located in the femtocell managed by the station 1.

  In step S <b> 41, the monitoring control device 11 refers to the information stored in the located / separated area management AS 12 and confirms the terminals located in the femtocell managed by the femtocell base station 1.

  When it is confirmed that the mobile device 21 is newly located, the monitoring control device 11 requests the femtocell base station 1 to measure the electric field strength of the radio wave output from the mobile device 21 in step S42.

  In step S73, the femtocell base station 1 receives the request from the supervisory control device 11, and in step S74, measures the electric field strength of the radio wave output from the mobile device 21.

  In step S75, the femtocell base station 1 transmits measurement information representing a measurement result to the monitoring control device 11.

  In step S43, the supervisory control device 11 receives the measurement information transmitted from the femtocell base station 1, and transmits it to the area one segment broadcast management AS 13 in step S44.

  In step S61, the area one segment broadcast management AS 13 receives the measurement information transmitted from the supervisory control device 11, and in step S62, recalculates the electric field strength of the broadcast wave output from the femtocell base station 1. For the recalculation of the electric field intensity of the broadcast wave, the electric field intensity of the communication wave output by the femtocell base station 1 represented by the communication wave output information received in step S11 of FIG. 3 is also used as appropriate.

  For example, when the reach of the communication wave output from the femtocell base station 1 becomes narrow due to the influence of the radio wave output from the mobile device 21, the broadcast wave is set so that the reach of the broadcast wave becomes narrow accordingly. Is recalculated. That is, the electric field strength of the broadcast wave is calculated so that the reach of the broadcast wave matches the reach of the communication wave after the mobile device 21 is located.

  In step S63, the area one segment broadcast management AS 13 transmits broadcast wave output adjustment information, which is information indicating the electric field strength of the broadcast wave obtained by recalculation, to the monitoring control device 11.

  In step S45, the monitoring controller 11 receives the broadcast wave output adjustment information transmitted from the area one segment broadcast management AS 13, and transmits it to the femtocell base station 1 in step S46.

  In step S76, the femtocell base station 1 receives the broadcast wave output adjustment information transmitted from the monitoring control device 11, and in step S77, the femtocell base station 1 outputs the broadcast wave output adjustment information with the intensity represented by the broadcast wave output adjustment information. Adjust the electric field strength of the wave.

  Through the above processing, even if a deviation occurs between the range where wireless communication can be used and the range where one-segment broadcasting can be used in accordance with the presence of the mobile device 21, the deviation is corrected. Is possible.

  Instead of adjusting the electric field intensity of the broadcast wave again, the electric field intensity of the communication wave may be adjusted again, or the electric field intensity of both the broadcast wave and the communication wave may be adjusted again. Also good.

[Configuration example of each device]
FIG. 5 is a block diagram illustrating a configuration example of the femtocell base station 1.

  As shown in FIG. 5, the femtocell base station 1 includes a network communication unit 31, a control unit 32, a wireless communication unit 33, an antenna 34, an area one segment broadcast unit 35, and an antenna 36.

  The network communication unit 31 is a network interface, and performs communication via the LAN cable 2 and the modem 3 according to a predetermined protocol such as TCP / IP (Transmission Control Protocol / Internet Protocol) and UDP (User Datagram Protocol).

  The network communication unit 31 outputs, for example, voice data from the mobile device 21 located in the femtocell supplied from the wireless communication unit 33 to the modem 3 to be transmitted to the CSCF or the like. Further, the network communication unit 31 receives voice data transmitted from the CSCF and received by the modem 3 and outputs it to the wireless communication unit 33.

  When the communication wave output information or the broadcast wave output information is transmitted from the monitoring control device 11, the network communication unit 31 receives it and outputs it to the control unit 32.

  The control unit 32 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and controls the overall operation of the femtocell base station 1 by executing a predetermined program.

  For example, the control unit 32 controls the area one segment broadcasting unit 35 to perform area one segment broadcasting. Further, the control unit 32 controls the electric field intensity of the communication wave output from the antenna 34 by the wireless communication unit 33 based on the communication wave output information, and the electric field intensity of the broadcast wave output from the antenna 36 by the area one segment broadcasting unit 35. Is controlled based on broadcast wave output information.

  Under the control of the control unit 32, the wireless communication unit 33 outputs a communication wave having a predetermined intensity such as an antenna power of 20 mW or less from the antenna 34, and between the mobile devices 21 located in the femtocell, W -Carry out wireless communication of a predetermined standard such as CDMA, CDMA2000. The communication wave output from the wireless communication unit 33 is a radio wave in a frequency band such as a 2 GHz band and an 800 MHz band that is different from the frequency band of the broadcast wave output from the antenna 36 by the area one segment broadcasting unit 35.

  The wireless communication unit 33 transmits the audio data supplied from the network communication unit 31 to the mobile device 21 designated as the transmission destination. In addition, the wireless communication unit 33 outputs the audio data from the mobile device 21 received based on the signal supplied from the antenna 34 to the network communication unit 31.

  The area one segment broadcast unit 35 outputs a broadcast wave having a predetermined intensity from the antenna 36 according to the control of the control unit 32 and performs area one segment broadcast. For example, when content transmitted from a predetermined server is received by the network communication unit 31 and supplied via a route (not shown), the area one segment broadcasting unit 35 broadcasts the supplied content.

  FIG. 6 is a block diagram illustrating a functional configuration example of the femtocell base station 1.

  6 is realized by a predetermined program being executed by the CPU in the control unit 32 of FIG. As shown in FIG. 6, in the control unit 32, an electric field intensity control unit 41, a measurement unit 42, and a located area detection unit 43 are realized.

  The electric field strength control unit 41 controls the electric field strength of the communication wave output from the antenna 34 by the wireless communication unit 33 based on the communication wave output information supplied from the network communication unit 31, and based on the broadcast wave output information. The area one segment broadcasting unit 35 controls the electric field strength of the broadcast wave output from the antenna 36.

  After successful authentication, the measurement unit 42 measures the electric field strength of radio waves output from other external base stations based on the information supplied from the wireless communication unit 33, and sends the measurement information to the network communication unit 31. The data is output and transmitted to the monitoring control device 11. From the wireless communication unit 33, information indicating the level of a signal obtained by demodulating the radio wave received by the antenna 34 is supplied.

  In addition, when the mobile device 21 is located in the femtocell, the measurement unit 42 measures the electric field strength of the radio wave output from the mobile device 21 in response to a request from the monitoring control device 11, and sends the measurement information to the network communication unit. It outputs to 31 and transmits to the monitoring control apparatus 11.

  The located area detection unit 43 detects the located area of the mobile device based on the information supplied from the wireless communication unit 33. When the mobile device 21 is present in the femtocell, the location detection unit 43 controls the network communication unit 31 to obtain the location information including the identification information of the mobile device 21 and the identification information of the femtocell base station 1.・ Send to out-of-zone management AS12.

  FIG. 7 is a block diagram illustrating a configuration example of the monitoring control device 11.

  The CPU 51, ROM 52, and RAM 53 are connected to each other by a bus 54. An input / output interface 55 is further connected to the bus 54. Connected to the input / output interface 55 are an input unit 56 such as a keyboard and a mouse, and an output unit 57 such as a display and a speaker. In addition, a storage unit 58 including a hard disk or a nonvolatile memory and a communication unit 59 are connected to the bus 54.

  The communication unit 59 includes a network interface and the like, and communicates with external devices such as the femtocell base station 1, the located / separated area management AS 12, and the area one segment broadcast management AS 13 via the network 5.

  The located / separated area management AS 12 and the area one segment broadcast management AS 13 also have the same configuration as that of the monitoring control apparatus 11 shown in FIG. In the following, the configuration shown in FIG. 7 will be described with reference to the configuration of the located / separated area management AS 12 and the area one segment broadcast management AS 13 as appropriate.

  The monitoring and control device 11, the located / separated area management AS 12, and the area one segment broadcast management AS 13 are not configured by one computer, but each device may be configured by a plurality of computers. .

  FIG. 8 is a block diagram illustrating a functional configuration example of the monitoring control device 11 and the area one segment broadcast management AS 13.

  At least a part of the functional configuration shown in FIG. 8 is realized by the CPU 51 of each apparatus loading, for example, a program stored in the storage unit 58 into the RAM 53 and executing it.

  As shown in FIG. 8, in the monitoring control device 11, a measurement information receiving unit 71, a communication wave electric field strength calculating unit 72, and a transmitting unit 73 are realized. In the area one segment broadcast management AS 13, a receiving unit 81, and A broadcast wave electric field strength calculation unit 82 is realized. In the located / separated area management AS 12, a configuration is realized in which the located area information transmitted from the femtocell base station 1 is received and the identification information is associated and stored.

  The measurement information receiving unit 71 of the monitoring control device 11 receives the measurement information transmitted from the femtocell base station 1. The measurement information receiving unit 71 displays the measurement information indicating the result of the measurement of the electric field strength of the radio wave output from another external base station, which is performed after successful authentication, among the received measurement information. It outputs to the calculation part 72. In addition, the measurement information receiving unit 71 displays the measurement information indicating the result of the measurement of the electric field strength of the radio wave output from the mobile device performed when the mobile device is newly located in the femtocell. It transmits to management AS13.

  The communication wave electric field strength calculation unit 72 calculates the electric field strength of the communication wave based on the measurement information supplied from the measurement information reception unit 71, and outputs the communication wave output information indicating the electric field strength obtained by the calculation to the transmission unit 73. To do. Moreover, the communication wave electric field strength calculation part 72 notifies the electric field strength of the communication wave which the femtocell base station 1 outputs by transmitting communication wave output information to the area one segment broadcast management AS13.

  The transmission unit 73 transmits the communication wave output information supplied from the communication wave field intensity calculation unit 72 to the femtocell base station 1. In addition, when the broadcast wave output information and the broadcast wave output adjustment information are transmitted from the area one segment broadcast management AS 13, the transmission unit 73 transmits it to the femtocell base station 1.

  The reception unit 81 of the area one segment broadcast management AS 13 receives the communication wave output information transmitted from the communication wave field strength calculation unit 72 of the monitoring control device 11 and outputs the communication wave output information to the broadcast wave field strength calculation unit 82. In addition, when the measurement information indicating the electric field strength of the radio wave output from the mobile device is transmitted from the measurement information receiving unit 71 of the monitoring control device 11, the receiving unit 81 receives the measurement information and receives the broadcast wave electric field strength calculation unit 82. Output to.

  When the communication wave output information is supplied from the reception unit 81, the broadcast wave electric field strength calculation unit 82 calculates the electric field strength of the broadcast wave based on the electric field strength of the communication wave output from the femtocell base station 1, and broadcast wave The output information is transmitted to the monitoring control device 11.

  In addition, the broadcast wave electric field intensity calculation unit 82 receives the measurement information indicating the electric field intensity of the radio wave output from the mobile device from the reception unit 81, and the electric field intensity of the communication wave output from the femtocell base station 1 and the movement. The broadcast wave electric field strength is recalculated based on the electric field strength of the radio wave output from the machine, and the broadcast wave output adjustment information is transmitted to the monitoring control device 11.

  Each configuration in FIG. 8 may be realized on one computer, or the entire configuration obtained by adding the configuration of the in-zone / out-of-zone management AS 12 to each configuration in FIG. 8 is realized on one computer. You may do it.

<Second Embodiment>
In the above description, the calculation of the electric field strength of the communication wave or the broadcast wave is performed by the device on the core network side. However, the femtocell base station 1 can also have a function of calculating the electric field strength.

[Configuration example of femtocell base station]
FIG. 9 is a block diagram illustrating a functional configuration example of the femtocell base station 1 that also has a function of calculating the electric field strength of communication waves and broadcast waves. The hardware configuration of the femtocell base station 1 is the same as that shown in FIG.

  As shown in FIG. 9, in the control unit 32 of the femtocell base station 1, a location detection unit 101, a measurement unit 102, a calculation unit 103, and an electric field strength control unit 104 are realized.

  The located area detecting unit 101 detects the located area of the mobile device based on the information supplied from the wireless communication unit 33. When detecting that the mobile device is located in the femtocell, the located area detecting unit 101 controls the network communication unit 31 to transmit the located area information to the located / separated area management AS 12 and move to the femtocell. Information indicating that the machine is in service is output to the measurement unit 102.

  Based on the information supplied from the wireless communication unit 33 during measurement after successful authentication, the measurement unit 102 measures the electric field strength of radio waves output from other external base stations, and calculates the measurement information. Output to. Further, when a mobile device is located in the femtocell, the measurement unit 102 measures the electric field strength of the radio wave output from the mobile device and outputs measurement information to the calculation unit 103.

  When the measurement information representing the result of the measurement performed after successful authentication is supplied from the measurement unit 102, the calculation unit 103 calculates the electric field strength of the communication wave and represents the electric field strength of the communication wave obtained by the calculation. The communication wave output information is output to the electric field intensity control unit 104.

  Further, the calculation unit 103 calculates the electric field strength of the broadcast wave so that the reachable range of the broadcast wave matches the reachable range of the communication wave based on the electric field strength of the communication wave obtained by the calculation, and the broadcast obtained by the calculation Broadcast wave output information indicating the electric field strength of the wave is output to the electric field strength control unit 104.

  When the measurement information indicating the electric field strength of the radio wave output from the mobile device is supplied from the measurement unit 102, the calculation unit 103 determines the electric field strength of the communication wave output from the femtocell base station 1 and the radio wave output from the mobile device. Based on the electric field strength, the electric field strength of the broadcast wave is recalculated, and broadcast wave output adjustment information is transmitted to the electric field strength control unit 104.

  The electric field strength control unit 104 controls the electric field strength of the communication wave output from the antenna 34 by the wireless communication unit 33 based on the communication wave output information supplied from the calculation unit 103, and determines the area based on the broadcast wave output information. The one-segment broadcast unit 35 controls the electric field strength of the broadcast wave output from the antenna 36.

  The electric field intensity control unit 104 controls again the intensity of the broadcast wave output from the antenna 36 by the area one segment broadcast unit 35 based on the broadcast wave output adjustment information supplied from the calculation unit 103.

[Operation of femtocell base station]
With reference to the flowchart of FIG. 10, the output control process which the femtocell base station 1 which has the structure of FIG. 9 performs is demonstrated. The process of FIG. 10 is started when the femtocell base station 1 is activated, for example.

  In step S101, the measurement unit 102 of the femtocell base station 1 measures the electric field strength of radio waves output from other external base stations such as a macro cell base station and a femto cell base station in the vicinity.

  In step S102, the calculation unit 103 calculates the electric field strength of the communication wave based on the measurement result by the measurement unit 102 so as not to cause interference with the radio wave received at the installation position of the femtocell base station 1.

  In step S <b> 103, the electric field intensity control unit 104 adjusts the electric field intensity of the communication wave so as to output with the intensity obtained by the calculation unit 103.

  In step S104, the calculation unit 103 calculates the electric field strength of the broadcast wave by calculation based on the electric field strength of the communication wave.

  In step S <b> 105, the electric field intensity control unit 104 adjusts the electric field intensity of the broadcast wave so as to output with the intensity obtained by the calculation unit 103. As a result, the communication wave reachable range and the broadcast wave reachable range coincide.

  In step S106, the location detection unit 101 determines whether or not the mobile device has been in the service area, and waits until it is determined that the mobile device has been in the service area.

  When it is determined in step S106 that the mobile device has been in service, in step S107, the measurement unit 102 measures the electric field strength of the radio wave output from the mobile device 21 that has newly been in the service area.

  In step S108, the calculation unit 103 recalculates the electric field strength of the broadcast wave. In the recalculation of the electric field intensity of the broadcast wave, the electric field intensity of the radio wave output from the mobile device 21 and the electric field intensity of the communication wave adjusted in step S103 are used.

  In step S <b> 109, the electric field strength control unit 104 readjusts the electric field strength of the broadcast wave so as to output with the strength obtained by the calculation unit 103. Thereafter, the process returns to step S106, and the adjustment of the electric field strength of the broadcast wave is repeated every time the mobile device is located.

  By adjusting the electric field strength of the broadcast wave every time the mobile device is located, it is possible to always match the reach of the broadcast wave with the reach of the communication wave.

<Modification>
In the above, the field strength of the broadcast wave is determined and the field strength of the broadcast wave is adjusted so that the reach of the broadcast wave matches the range of the communication wave as a reference. In addition, the electric field strength of the communication wave may be determined so that the communication wave reachable range matches the range of the broadcast wave with reference to the broadcast wave reachable range, and the electric field strength of the communication wave may be adjusted.

  Further, the electric field strengths of both the broadcast wave and the communication wave may be adjusted instead of one of the broadcast wave and the communication wave.

  Furthermore, in the above description, the case where the radio wave for performing radio communication by femtocell and the radio wave for performing area one segment broadcasting are made to coincide with each other has been described. The number of radio waves for adjusting the electric field strength is not limited to two, but the electric field strengths of radio waves of a larger number may be adjusted so that the reach ranges are matched.

  Also, the types of radio waves are not limited to radio waves for performing femtocell wireless communications and area one segment broadcasts. Radio waves for performing wireless LAN communications and radio waves for performing Bluetooth communications. Other types of radio waves such as full segment broadcast radio waves, which are broadcasts using the entire 13 segments, may be used.

  In place of the femtocell base station 1, a base station forming a small cell called “picocell” or “microcell” is provided, and the electric field strength of the communication wave and the broadcast wave is adjusted by the base station as described above. You may be made to do. The small base station is a base station that forms a small cell such as a femto cell, a pico cell, or a micro cell.

  The embodiments of the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

  DESCRIPTION OF SYMBOLS 1 Femtocell base station, 11 Monitoring and control apparatus, 12 In-zone / distant area management AS, 13 Area one segment broadcast management AS, 21 Mobile station, 31 Network communication part, 32 Control part, 33 Wireless communication part, 35 Area one segment Broadcasting section, 41 Field strength control section, 42 Measuring section, 43 Location detection section

Claims (6)

A communication means for outputting a communication wave for performing communication with a mobile device located in a cell managed by itself;
Broadcasting means for outputting a broadcast wave that can be received by the mobile device and uses a frequency band different from the communication wave ;
A small base station comprising: control means for controlling electric field intensity of radio waves output from the communication means or the broadcast means so that the communication wave reachable range and the broadcast wave reachable range are matched. It further comprises a measuring means for measuring the electric field strength of radio waves output from other base stations,
The control means controls the electric field intensity of the communication wave with respect to the communication means in accordance with the electric field intensity of the radio wave output from the other base station, and matches the reach of the communication wave after the control. The small base station according to claim 1, wherein the electric field intensity of the broadcast wave is controlled with respect to the broadcasting means. The measuring means further measures the electric field strength of a communication wave output from a mobile device located in a cell managed by the measuring means,
The small base station according to claim 2, wherein the control unit further controls the electric field strength of the broadcast wave with respect to the broadcasting unit according to the electric field strength of the communication wave output from the mobile device. The said control means performs control of the electric field strength of the said broadcast wave according to the electric field strength of the communication wave which the said mobile device outputs, whenever the said mobile device exists in the cell which self manages. Small base station. A communication means for outputting a communication wave for performing communication with a mobile device located in a cell managed by itself;
In a control method of a small base station comprising: broadcast means that outputs a broadcast wave that uses a frequency band different from the communication wave that can be received by the mobile device;
A control method including a step of controlling an electric field intensity of a radio wave output by the communication unit or the broadcasting unit so that the communication wave reachable range and the broadcast wave reachable range are matched. In a communication system composed of a small base station and a control device connected via a network,
The small base station is
A communication means for outputting a communication wave for performing communication with a mobile device located in a cell managed by itself;
Broadcasting means for outputting a broadcast wave that can be received by the mobile device and uses a frequency band different from the communication wave ;
Measuring means for measuring electric field strength of radio waves received at the installation position of the small base station ;
Communicating with the control device, transmitting information indicating the electric field strength of the radio wave received at the installation position of the small base station measured by the measuring means to the control device, has been transmitted from the control device, A communication means for receiving output information which is information on the electric field strength of radio waves;
Based on the output information received by the communication means, the electric field intensity of the radio wave output from the communication means or the broadcast means is controlled so that the communication wave reachable range and the broadcast wave reachable range are matched. And control means for
The control device includes:
Received from the small base station is information indicating the electric field strength of the radio wave received at the installation position of the small base station, and the radio wave determined based on the electric field strength represented by the received information. A communication system comprising communication means for transmitting the output information, which is information relating to electric field strength, to the small base station.

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