WO2014115683A1 - Converter and conversion method - Google Patents

Converter and conversion method Download PDF

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Publication number
WO2014115683A1
WO2014115683A1 PCT/JP2014/050976 JP2014050976W WO2014115683A1 WO 2014115683 A1 WO2014115683 A1 WO 2014115683A1 JP 2014050976 W JP2014050976 W JP 2014050976W WO 2014115683 A1 WO2014115683 A1 WO 2014115683A1
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WIPO (PCT)
Prior art keywords
signal
communication method
wireless
conversion device
frequency band
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PCT/JP2014/050976
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French (fr)
Japanese (ja)
Inventor
明彦 田近
良仁 島崎
潤一 宮川
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ソフトバンクモバイル株式会社
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Publication of WO2014115683A1 publication Critical patent/WO2014115683A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H04B7/15542—Selecting at relay station its transmit and receive resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/18—Service support devices; Network management devices
    • H04W88/181—Transcoding devices; Rate adaptation devices

Definitions

  • the present invention relates to a communication method between the outdoor and indoor, and an apparatus and method for converting the operating frequency band.
  • LTE mobile communication technology
  • FD-LTE uses different frequency bands for uplink communication from a mobile station to a base station and downlink communication from a base station to a mobile station.
  • TD-LTE uses different frequency bands for uplink communication from a mobile station to a base station and downlink communication from a base station to a mobile station.
  • TD-LTE uses different frequency bands for uplink communication from a mobile station to a base station and downlink communication from a base station to a mobile station.
  • TD-LTE the same frequency band is divided by time slots, and uplink communication and downlink communication are alternately switched.
  • FD-LTE and TD-LTE have different communication methods and operating frequency bands, for example, even if a mobile device located in a certain room is compatible with FD-LTE, it is provided outdoors.
  • the TD-LTE communication service cannot be used, and the frequency resource cannot be effectively used.
  • an object of the present invention is to absorb the difference in the communication method and the operating frequency band between the outdoors and indoors and to effectively use the frequency resources.
  • a conversion device includes a first wireless communication unit that receives a wireless signal of a first communication method operated in a first frequency band from the outdoors, and a received first communication device.
  • a converter that converts a wireless signal of one communication method into a wireless signal of a second communication method that is operated in the second frequency band; and a first unit that transmits the converted wireless signal of the second communication method indoors A second wireless communication unit.
  • the second wireless communication unit may receive the wireless signal of the second communication method from the indoor, and the conversion unit receives the received wireless signal of the second communication method from the wireless signal of the first communication method.
  • the first wireless communication unit may transmit the converted wireless signal of the first communication method outdoors.
  • a conversion device is a wireless modem that receives a radio signal of the first communication method operated in the first frequency band from the outside and converts it to a signal that conforms to the Internet protocol,
  • a femtocell base station that converts a signal conforming to the Internet protocol into a radio signal of a second communication method operated in the second frequency band and transmits the signal indoors.
  • the femtocell base station may receive the radio signal of the second communication method from the indoor and convert it into a signal conforming to the Internet protocol, and the wireless modem transmits the signal conforming to the Internet protocol. It may be converted into a radio signal of one communication method and transmitted outdoors.
  • the wireless modem may be attached to an indoor window or its surroundings. Thereby, the reception sensitivity of the wireless model can be increased.
  • the femtocell base station may further include a shielding member for preventing leakage of the radio signal of the second communication method to the outdoors. Thereby, the radio signal of the second communication method can be efficiently transmitted indoors.
  • the conversion device may further include a housing that accommodates the wireless modem and the femtocell base station.
  • the wireless modem receives a radio signal of the third communication method operated in the third frequency band from the outside, converts it into a signal conforming to the Internet protocol, and supplies it to the femtocell base station.
  • a signal conforming to the Internet protocol supplied from the femtocell base station may be converted into a wireless signal of the third communication method and exchanged with a wireless modem that transmits the signal outdoors.
  • FIG. 1 is an explanatory diagram showing an outline of functions of the conversion apparatus 10 according to the present embodiment.
  • the conversion device 10 receives a radio signal of the first communication method (for example, TD-LTE) operated in the first frequency band from the outdoor 200 and receives it in the second frequency band. It is converted into a radio signal of a second communication method (for example, FD-LTE) that is in operation and transmitted to the indoor 300.
  • the conversion device 10 receives a radio signal of the second communication method from the indoor 300, converts it into a radio signal of the first communication method, and transmits it to the outdoor 200.
  • the mobile device 100 is, for example, a high-function mobile phone device such as a smartphone, a personal digital assistant, a portable personal computer, or the like.
  • FIG. 2 is a functional block diagram showing the configuration of the conversion apparatus 10 according to this embodiment.
  • the conversion device 10 includes a wireless wireless modem 20 that transmits and receives a radio signal of the first communication method to and from the outdoor 200, and a femtocell base station 30 that transmits and receives a radio signal of the second communication method to and from the indoor 300.
  • the wireless modem 20 includes hardware resources such as an antenna, an amplifier, a frequency converter, a filter, a modem, a processor, and a memory, and the wireless communication unit 21 and the conversion are performed by cooperation of these hardware resources.
  • the function of the unit 22 is realized.
  • the wireless communication unit 21 is a wireless communication module having a function of transmitting and receiving a wireless signal of the first communication method operated in the first frequency band to and from the outdoor 200.
  • the conversion unit 22 is a conversion module having a function of mutually converting a radio signal of the first communication method and a signal conforming to the Internet protocol.
  • the wireless modem 20 for example, a commercially available AXGP modem compatible with TD-LTE can be used.
  • the femtocell base station 30 includes hardware resources such as an antenna, a high-frequency circuit, a baseband circuit, a network interface circuit compliant with the TCP / IP protocol, a processor, and a memory. As a result, the functions of the wireless communication unit 31 and the conversion unit 32 are realized.
  • the wireless communication unit 31 is a wireless communication module having a function of transmitting / receiving a wireless signal of the second communication method operated in the second frequency band to / from the indoor 300.
  • the conversion unit 32 is a conversion module having a function of mutually converting a radio signal of the second communication method and a signal conforming to the Internet protocol.
  • the wireless modem 20 receives a radio signal of the first communication method from the outdoor 200 by the radio communication unit 21 and converts it into a signal format compliant with the Internet protocol by the conversion unit 22. Convert.
  • the femtocell base station 30 converts a signal conforming to the Internet protocol into a radio signal of the second communication method by the conversion unit 32, and transmits this to the indoor 300 by the radio communication unit 31.
  • the femtocell base station 30 receives a radio signal of the second communication method from the indoor 300 by the radio communication unit 31, and converts it into a signal format compliant with the Internet protocol by the conversion unit 32. To do.
  • the wireless modem 20 converts a signal conforming to the Internet protocol into a radio signal of the first communication method by the conversion unit 22 and transmits the signal to the outdoor 200 by the radio communication unit 21.
  • the conversion units 22 and 32 by the cooperation of the conversion units 22 and 32, the function of mutually converting the wireless signal of the first communication method and the wireless signal of the second communication method through a signal format compliant with the Internet protocol. Is realized.
  • the wireless modem 20 receives a radio signal of the third communication method (for example, WiMax) operated in the third frequency band from the outdoor 200 and converts it into a signal compliant with the Internet protocol.
  • a signal conforming to the Internet protocol supplied from the femtocell base station 30 is converted into a wireless signal of the third communication method and exchanged with a wireless modem 40 that transmits the signal to the outdoor 200.
  • the wireless modem 40 includes, for example, hardware resources such as an antenna, an amplifier, a frequency converter, a filter, a modem, a processor, and a memory. The function of the unit 42 is realized.
  • the wireless communication unit 41 is a wireless communication module having a function of transmitting and receiving a wireless signal of the third communication method to and from the outdoor 200.
  • the conversion unit 42 is a conversion module having a function of mutually converting a wireless signal of the third communication method and a signal conforming to the Internet protocol.
  • the wireless modems 20 and 40 are interchangeable because they transmit and receive signals to and from the femtocell base station 30 in a signal format that conforms to the Internet protocol.
  • the frequency resources can be effectively used by exchanging the wireless modems 20 and 40 according to the radio environment of the outdoor 200.
  • the conversion device 10 configured by housing the wireless modem 20 and the femtocell base station 30 in one housing 80 may be attached to the window 90 in the indoor 300 or the periphery thereof.
  • the wireless modem 20 is connected to the femtocell base station 30 via a LAN cable 53 for transmitting a signal compliant with the Internet protocol. You may attach to 90 or its periphery. In any case, it is preferable to attach at least the wireless modem 20 to the window 90 or the vicinity thereof, thereby improving reception sensitivity. If a sticking tape or the like is used, the wireless modem 20 can be easily attached to the window 90 or its periphery.
  • FIG. 5 shows a specific configuration example of the conversion apparatus 10 shown in FIG.
  • the conversion device 10 includes a housing 80 that integrally accommodates the wireless modem 20 and the femtocell base station 30.
  • the housing 80 further accommodates a control board 50 that is connected to the wireless modem 20 via the USB cable 51 and connected to the femtocell base station 30 via the LAN cable 52.
  • the femtocell base station 30 includes a shielding member 70 for preventing the radio signal of the second communication method from leaking to the outdoors 200.
  • An AC adapter 60 for converting AC power from a commercial power source into DC power is further accommodated in the housing 80, and power is supplied to the femtocell base station 30 via the power cable 61.
  • the combination of the commercially available wireless modem 20 and the femtocell base station 30 makes it possible to reduce the cost of the converter 10 that can absorb the difference in the communication method and the operating frequency band between the outdoor 200 and the indoor 300. Can be provided.
  • the two wireless modems 20 and 40 compatible with different communication systems interchangeable, it is possible to absorb differences in various communication systems and operating frequency bands between the outdoor 200 and the indoor 300. can do.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

[Problem] To accommodate the differences between communication schemes and the operating frequency bands thereof between the inside and the outside of a building, and to effectively utilize frequency resources. [Solution] A converter (10) is provided with: a wireless modem (20) that receives wireless signals of a first communication scheme operating in a first frequency band from the outside of a building, and converts the received signals into signals compliant with an internet protocol; and a femtocell base station (30) that converts the signals compliant with the internet protocol into wireless signals of a second communication scheme operating in a second frequency band, and transmits the converted signals to the inside of the building.

Description

変換装置及び変換方法Conversion device and conversion method
　本発明は、屋外と屋内との間における通信方式及びその運用周波数帯域を変換するための装置及び方法に関する。 The present invention relates to a communication method between the outdoor and indoor, and an apparatus and method for converting the operating frequency band.
　近年の移動通信サービスでは、帯域幅の広帯域化及びデータレートの高速化が進み、音楽や映像などのマルチメディアサービスが実現されている。更なる高速データサービスを提供するため、移動通信技術の標準化団体である３ＧＰＰでは、ＬＴＥと呼ばれるデータレート１００Ｍｂｐｓ超の移動通信技術が検討されている。ＬＴＥには、ＦＤ－ＬＴＥと呼ばれる周波数多重分割方式と、ＴＤ－ＬＴＥと呼ばれる時分割多重方式とがある。ＦＤ－ＬＴＥは、移動機から基地局への上り方向の通信と基地局から移動機への下り方向の通信とでそれぞれ異なる周波数帯域を利用する。一方、ＴＤ－ＬＴＥは、同一の周波数帯域をタイムスロットで分割し、上り方向の通信と下り方向の通信を交互に切り替えている。 In recent mobile communication services, bandwidths have increased and data rates have increased, and multimedia services such as music and video have been realized. In order to provide a further high-speed data service, 3GPP, which is a standardization body of mobile communication technology, is examining a mobile communication technology called LTE, which has a data rate exceeding 100 Mbps. LTE includes a frequency division multiplexing method called FD-LTE and a time division multiplexing method called TD-LTE. FD-LTE uses different frequency bands for uplink communication from a mobile station to a base station and downlink communication from a base station to a mobile station. On the other hand, in TD-LTE, the same frequency band is divided by time slots, and uplink communication and downlink communication are alternately switched.
　しかし、ＦＤ－ＬＴＥとＴＤ－ＬＴＥは、通信方式及びその運用周波数帯域が相違するため、例えば、ある屋内に所在する移動機がＦＤ－ＬＴＥに対応していたとしても、その屋外で提供されているＴＤ－ＬＴＥの通信サービスを利用することができず、周波数資源の有効利用を図ることができない。 However, since FD-LTE and TD-LTE have different communication methods and operating frequency bands, for example, even if a mobile device located in a certain room is compatible with FD-LTE, it is provided outdoors. The TD-LTE communication service cannot be used, and the frequency resource cannot be effectively used.
　そこで、本発明は、屋外と屋内との間における通信方式及びその運用周波数帯域の相違を吸収し、周波数資源の有効利用を図ることを課題とする。 Therefore, an object of the present invention is to absorb the difference in the communication method and the operating frequency band between the outdoors and indoors and to effectively use the frequency resources.
　上記の課題を解決するため、本発明に係わる変換装置は、第一の周波数帯域で運用されている第一の通信方式の無線信号を屋外から受信する第一の無線通信部と、受信した第一の通信方式の無線信号を第二の周波数帯域で運用されている第二の通信方式の無線信号に変換する変換部と、変換された第二の通信方式の無線信号を屋内に送信する第二の無線通信部と、を備える。屋内に所在する移動機が第二の通信方式に対応しているが、第一の通信方式に対応していない場合に、通信方式及び周波数帯域を変換する機能を有する変換装置を設置することにより、周波数資源の有効利用を図ることができる。ここで、第二の無線通信部は、第二の通信方式の無線信号を屋内から受信してもよく、変換部は、受信した第二の通信方式の無線信号を第一の通信方式の無線信号に変換してもよく、第一の無線通信部は、変換された第一の通信方式の無線信号を屋外に送信してもよい。 In order to solve the above-described problem, a conversion device according to the present invention includes a first wireless communication unit that receives a wireless signal of a first communication method operated in a first frequency band from the outdoors, and a received first communication device. A converter that converts a wireless signal of one communication method into a wireless signal of a second communication method that is operated in the second frequency band; and a first unit that transmits the converted wireless signal of the second communication method indoors A second wireless communication unit. When a mobile device located indoors supports the second communication method but does not support the first communication method, by installing a conversion device having a function of converting the communication method and frequency band Therefore, effective use of frequency resources can be achieved. Here, the second wireless communication unit may receive the wireless signal of the second communication method from the indoor, and the conversion unit receives the received wireless signal of the second communication method from the wireless signal of the first communication method. The first wireless communication unit may transmit the converted wireless signal of the first communication method outdoors.
　本発明の他の観点に係わる変換装置は、第一の周波数帯域で運用されている第一の通信方式の無線信号を屋外から受信しこれをインターネットプロトコルに準拠した信号に変換するワイヤレスモデムと、インターネットプロトコルに準拠した信号を第二の周波数帯域で運用されている第二の通信方式の無線信号に変換しこれを屋内に送信するフェムトセル基地局と、を備える。市販のワイヤレスモデムとフェムトセル基地局とを組み合わせることで、屋外と屋内との間における通信方式及びその運用周波数帯域の相違を吸収できる変換装置を安価に提供できる。ここで、フェムトセル基地局は、第二の通信方式の無線信号を屋内から受信してこれをインターネットプロトコルに準拠した信号に変換してもよく、ワイヤレスモデムは、インターネットプロトコルに準拠した信号を第一の通信方式の無線信号に変換してこれを屋外に送信してもよい。 A conversion device according to another aspect of the present invention is a wireless modem that receives a radio signal of the first communication method operated in the first frequency band from the outside and converts it to a signal that conforms to the Internet protocol, A femtocell base station that converts a signal conforming to the Internet protocol into a radio signal of a second communication method operated in the second frequency band and transmits the signal indoors. By combining a commercially available wireless modem and a femtocell base station, it is possible to provide an inexpensive conversion device that can absorb differences in communication methods and operating frequency bands between outdoors and indoors. Here, the femtocell base station may receive the radio signal of the second communication method from the indoor and convert it into a signal conforming to the Internet protocol, and the wireless modem transmits the signal conforming to the Internet protocol. It may be converted into a radio signal of one communication method and transmitted outdoors.
　ワイヤレスモデムは、屋内の窓又はその周辺に取り付けてもよい。これにより、ワイヤレスモデルの受信感度を高めることができる。 The wireless modem may be attached to an indoor window or its surroundings. Thereby, the reception sensitivity of the wireless model can be increased.
　フェムトセル基地局は、第二の通信方式の無線信号の屋外への漏洩を防ぐための遮蔽部材を更に備えてもよい。これにより、第二の通信方式の無線信号を屋内に効率的に送信できる。 The femtocell base station may further include a shielding member for preventing leakage of the radio signal of the second communication method to the outdoors. Thereby, the radio signal of the second communication method can be efficiently transmitted indoors.
　本発明の好適な実施形態において、変換装置は、ワイヤレスモデム及びフェムトセル基地局を収容する筐体を更に備えてもよい。 In a preferred embodiment of the present invention, the conversion device may further include a housing that accommodates the wireless modem and the femtocell base station.
　ワイヤレスモデムは、第三の周波数帯域で運用されている第三の通信方式の無線信号を屋外から受信しこれをインターネットプロトコルに準拠した信号に変換してこれをフェムトセル基地局に供給するとともに、フェムトセル基地局から供給されるインターネットプロトコルに準拠した信号を第三の通信方式の無線信号に変換してこれを屋外に送信するワイヤレスモデムに交換可能としてもよい。これにより、屋外と屋内との間における各種の通信方式及びその運用周波数帯域の相違を吸収することができる。 The wireless modem receives a radio signal of the third communication method operated in the third frequency band from the outside, converts it into a signal conforming to the Internet protocol, and supplies it to the femtocell base station. A signal conforming to the Internet protocol supplied from the femtocell base station may be converted into a wireless signal of the third communication method and exchanged with a wireless modem that transmits the signal outdoors. Thereby, the difference of the various communication systems and the operation frequency band between the outdoors and indoors can be absorbed.
　本発明によれば、屋外と屋内との間における通信方式及び運用周波数帯域の相違を吸収し、周波数資源の有効利用を図ることができる。 According to the present invention, it is possible to absorb the difference in communication method and operating frequency band between outdoors and indoors, and to effectively use frequency resources.
本実施形態に係わる変換装置の機能の概略を示す説明図である。It is explanatory drawing which shows the outline of the function of the converter concerning this embodiment. 本実施形態に係わる変換装置の構成を示す機能ブロック図である。It is a functional block diagram which shows the structure of the converter concerning this embodiment. 本実施形態に係わる変換装置の配置例を示す説明図である。It is explanatory drawing which shows the example of arrangement | positioning of the converter concerning this embodiment. 本実施形態に係わる変換装置の配置例を示す説明図である。It is explanatory drawing which shows the example of arrangement | positioning of the converter concerning this embodiment. 本実施形態に係わる変換装置の構成の一例を示す説明図である。It is explanatory drawing which shows an example of a structure of the converter concerning this embodiment.
　以下、各図を参照しながら本発明の実施形態について説明する。
　図１は、本実施形態に係わる変換装置１０の機能の概略を示す説明図である。下り方向の通信では、変換装置１０は、第一の周波数帯域で運用されている第一の通信方式（例えば、ＴＤ－ＬＴＥ）の無線信号を屋外２００から受信しこれを第二の周波数帯域で運用されている第二の通信方式（例えば、ＦＤ－ＬＴＥ）の無線信号に変換して屋内３００に送信する。一方、上り方向の通信では、変換装置１０は、第二の通信方式の無線信号を屋内３００から受信しこれを第一の通信方式の無線信号に変換して屋外２００に送信する。屋内３００に所在する移動機１００が第二の通信方式に対応しているが、第一の通信方式に対応していない場合に、通信方式及び周波数帯域を変換する機能を有する変換装置１０を設置することにより、周波数資源の有効利用を図ることができる。移動機１００は、例えば、スマートフォン等の高機能携帯電話装置、パーソナルデジタルアシスタント、携帯用パーソナルコンピュータ等である。 Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an explanatory diagram showing an outline of functions of the conversion apparatus 10 according to the present embodiment. In the downlink communication, the conversion device 10 receives a radio signal of the first communication method (for example, TD-LTE) operated in the first frequency band from the outdoor 200 and receives it in the second frequency band. It is converted into a radio signal of a second communication method (for example, FD-LTE) that is in operation and transmitted to the indoor 300. On the other hand, in uplink communication, the conversion device 10 receives a radio signal of the second communication method from the indoor 300, converts it into a radio signal of the first communication method, and transmits it to the outdoor 200. When the mobile device 100 located in the indoor 300 is compatible with the second communication method but is not compatible with the first communication method, the conversion device 10 having a function of converting the communication method and the frequency band is installed. By doing so, it is possible to effectively use frequency resources. The mobile device 100 is, for example, a high-function mobile phone device such as a smartphone, a personal digital assistant, a portable personal computer, or the like.
　図２は、本実施形態に係わる変換装置１０の構成を示す機能ブロック図である。変換装置１０は、第一の通信方式の無線信号を屋外２００との間で送受信するワイヤレスワイヤレスモデム２０と、第二の通信方式の無線信号を屋内３００との間で送受信するフェムトセル基地局３０とを備える。ワイヤレスモデム２０は、例えば、アンテナ、増幅器、周波数変換器、フィルタ、変復調器、プロセッサ、及びメモリ等のハードウェア資源を備えており、これらのハードウェア資源の協働により、無線通信部２１及び変換部２２の機能が実現される。無線通信部２１は、第一の周波数帯域で運用されている第一の通信方式の無線信号を屋外２００との間で送受信する機能を有する無線通信モジュールである。変換部２２は、第一の通信方式の無線信号とインターネットプロトコルに準拠した信号とを相互に変換する機能を有する変換モジュールである。ワイヤレスモデム２０として、例えば、ＴＤ－ＬＴＥに対応している市販のＡＸＧＰモデムを利用することができる。一方、フェムトセル基地局３０は、アンテナ、高周波回路、ベースバンド回路、ＴＣＰ／ＩＰプロトコルに準拠したネットワークインタフェース回路、プロセッサ、及びメモリ等のハードウェア資源を備えており、これらのハードウェア資源の協働により、無線通信部３１及び変換部３２の機能が実現される。無線通信部３１は、第二の周波数帯域で運用されている第二の通信方式の無線信号を屋内３００との間で送受信する機能を有する無線通信モジュールである。変換部３２は、第二の通信方式の無線信号とインターネットプロトコルに準拠した信号とを相互に変換する機能を有する変換モジュールである。 FIG. 2 is a functional block diagram showing the configuration of the conversion apparatus 10 according to this embodiment. The conversion device 10 includes a wireless wireless modem 20 that transmits and receives a radio signal of the first communication method to and from the outdoor 200, and a femtocell base station 30 that transmits and receives a radio signal of the second communication method to and from the indoor 300. With. The wireless modem 20 includes hardware resources such as an antenna, an amplifier, a frequency converter, a filter, a modem, a processor, and a memory, and the wireless communication unit 21 and the conversion are performed by cooperation of these hardware resources. The function of the unit 22 is realized. The wireless communication unit 21 is a wireless communication module having a function of transmitting and receiving a wireless signal of the first communication method operated in the first frequency band to and from the outdoor 200. The conversion unit 22 is a conversion module having a function of mutually converting a radio signal of the first communication method and a signal conforming to the Internet protocol. As the wireless modem 20, for example, a commercially available AXGP modem compatible with TD-LTE can be used. On the other hand, the femtocell base station 30 includes hardware resources such as an antenna, a high-frequency circuit, a baseband circuit, a network interface circuit compliant with the TCP / IP protocol, a processor, and a memory. As a result, the functions of the wireless communication unit 31 and the conversion unit 32 are realized. The wireless communication unit 31 is a wireless communication module having a function of transmitting / receiving a wireless signal of the second communication method operated in the second frequency band to / from the indoor 300. The conversion unit 32 is a conversion module having a function of mutually converting a radio signal of the second communication method and a signal conforming to the Internet protocol.
　上述の構成により、下り方向の通信では、ワイヤレスモデム２０は、第一の通信方式の無線信号を無線通信部２１によって屋外２００から受信し、これを変換部２２によってインターネットプロトコルに準拠した信号形式に変換する。フェムトセル基地局３０は、インターネットプロトコルに準拠した信号を変換部３２によって第二の通信方式の無線信号に変換し、これを無線通信部３１によって屋内３００に送信する。一方、上り方向の通信では、フェムトセル基地局３０は、第二の通信方式の無線信号を無線通信部３１によって屋内３００から受信し、これを変換部３２によってインターネットプロトコルに準拠した信号形式に変換する。ワイヤレスモデム２０は、インターネットプロトコルに準拠した信号を変換部２２によって第一の通信方式の無線信号に変換し、これを無線通信部２１によって屋外２００に送信する。このように、変換部２２，３２の協働により、第一の通信方式の無線信号と第二の通信方式の無線信号とを、インターネットプロトコルに準拠した信号形式を介して、相互に変換する機能が実現される。 With the above configuration, in downstream communication, the wireless modem 20 receives a radio signal of the first communication method from the outdoor 200 by the radio communication unit 21 and converts it into a signal format compliant with the Internet protocol by the conversion unit 22. Convert. The femtocell base station 30 converts a signal conforming to the Internet protocol into a radio signal of the second communication method by the conversion unit 32, and transmits this to the indoor 300 by the radio communication unit 31. On the other hand, in uplink communication, the femtocell base station 30 receives a radio signal of the second communication method from the indoor 300 by the radio communication unit 31, and converts it into a signal format compliant with the Internet protocol by the conversion unit 32. To do. The wireless modem 20 converts a signal conforming to the Internet protocol into a radio signal of the first communication method by the conversion unit 22 and transmits the signal to the outdoor 200 by the radio communication unit 21. In this way, by the cooperation of the conversion units 22 and 32, the function of mutually converting the wireless signal of the first communication method and the wireless signal of the second communication method through a signal format compliant with the Internet protocol. Is realized.
　なお、ワイヤレスモデム２０は、第三の周波数帯域で運用されている第三の通信方式（例えば、ＷｉＭａｘ）の無線信号を屋外２００から受信しこれをインターネットプロトコルに準拠した信号に変換してこれをフェムトセル基地局３０に供給するとともに、フェムトセル基地局３０から供給されるインターネットプロトコルに準拠した信号を第三の通信方式の無線信号に変換してこれを屋外２００に送信するワイヤレスモデム４０に交換可能である。ワイヤレスモデム４０は、例えば、アンテナ、増幅器、周波数変換器、フィルタ、変復調器、プロセッサ、及びメモリ等のハードウェア資源を備えており、これらのハードウェア資源の協働により、無線通信部４１及び変換部４２の機能が実現される。無線通信部４１は、第三の通信方式の無線信号を屋外２００との間で送受信する機能を有する無線通信モジュールである。変換部４２は第三の通信方式の無線信号とインターネットプロトコルに準拠した信号とを相互に変換する機能を有する変換モジュールである。ワイヤレスモデム２０，４０は、何れも、インターネットプロトコルに準拠した信号形式でフェムトセル基地局３０との間で信号を送受信するため相互に交換可能である。屋外２００の無線環境に応じてワイヤレスモデム２０，４０を相互に交換することにより周波数資源の有効利用を図ることができる。 The wireless modem 20 receives a radio signal of the third communication method (for example, WiMax) operated in the third frequency band from the outdoor 200 and converts it into a signal compliant with the Internet protocol. In addition to being supplied to the femtocell base station 30, a signal conforming to the Internet protocol supplied from the femtocell base station 30 is converted into a wireless signal of the third communication method and exchanged with a wireless modem 40 that transmits the signal to the outdoor 200. Is possible. The wireless modem 40 includes, for example, hardware resources such as an antenna, an amplifier, a frequency converter, a filter, a modem, a processor, and a memory. The function of the unit 42 is realized. The wireless communication unit 41 is a wireless communication module having a function of transmitting and receiving a wireless signal of the third communication method to and from the outdoor 200. The conversion unit 42 is a conversion module having a function of mutually converting a wireless signal of the third communication method and a signal conforming to the Internet protocol. The wireless modems 20 and 40 are interchangeable because they transmit and receive signals to and from the femtocell base station 30 in a signal format that conforms to the Internet protocol. The frequency resources can be effectively used by exchanging the wireless modems 20 and 40 according to the radio environment of the outdoor 200.
　図３及び図４は、本実施形態に係わる変換装置１０の配置例を示す。例えば、図３に示すように、ワイヤレスモデム２０とフェムトセル基地局３０とが一つの筐体８０内に収容されて構成される変換装置１０を屋内３００の窓９０又はその周辺に取り付けてもよい。或いは、図４に示すように、インターネットプロトコルに準拠した信号を伝送するためのＬＡＮケーブル５３を介してワイヤレスモデム２０とフェムトセル基地局３０とが接続された状態でワイヤレスモデム２０を屋内３００の窓９０又はその周辺に取り付けてもよい。何れの場合も、少なくともワイヤレスモデム２０を窓９０又はその周辺に取り付けることが好ましく、これにより、受信感度を高めることができる。貼着テープ等を利用すれば、ワイヤレスモデム２０の窓９０又はその周辺への取り付けが容易になる。 3 and 4 show an arrangement example of the conversion apparatus 10 according to the present embodiment. For example, as shown in FIG. 3, the conversion device 10 configured by housing the wireless modem 20 and the femtocell base station 30 in one housing 80 may be attached to the window 90 in the indoor 300 or the periphery thereof. . Alternatively, as shown in FIG. 4, the wireless modem 20 is connected to the femtocell base station 30 via a LAN cable 53 for transmitting a signal compliant with the Internet protocol. You may attach to 90 or its periphery. In any case, it is preferable to attach at least the wireless modem 20 to the window 90 or the vicinity thereof, thereby improving reception sensitivity. If a sticking tape or the like is used, the wireless modem 20 can be easily attached to the window 90 or its periphery.
　図５は、図３に示す変換装置１０の具体的な構成例を示す。変換装置１０は、ワイヤレスモデム２０及びフェムトセル基地局３０を一体的に収容する筐体８０を備えている。筐体８０内には、ＵＳＢケーブル５１を介してワイヤレスモデム２０に接続するとともに、ＬＡＮケーブル５２を介してフェムトセル基地局３０に接続するコントロールボード５０が更に収容されている。フェムトセル基地局３０は、第二の通信方式の無線信号の屋外２００への漏洩を防ぐための遮蔽部材７０を備える。筐体８０内には、商用電源からの交流電力を直流電力に変換するためのＡＣアダプタ６０が更に収容されており、電源ケーブル６１を介してフェムトセル基地局３０に電力が供給される。 FIG. 5 shows a specific configuration example of the conversion apparatus 10 shown in FIG. The conversion device 10 includes a housing 80 that integrally accommodates the wireless modem 20 and the femtocell base station 30. The housing 80 further accommodates a control board 50 that is connected to the wireless modem 20 via the USB cable 51 and connected to the femtocell base station 30 via the LAN cable 52. The femtocell base station 30 includes a shielding member 70 for preventing the radio signal of the second communication method from leaking to the outdoors 200. An AC adapter 60 for converting AC power from a commercial power source into DC power is further accommodated in the housing 80, and power is supplied to the femtocell base station 30 via the power cable 61.
　本実施形態によれば、市販のワイヤレスモデム２０とフェムトセル基地局３０とを組み合わせることで、屋外２００と屋内３００との間における通信方式及びその運用周波数帯域の相違を吸収できる変換装置１０を安価に提供できる。また、それぞれ異なる通信方式に対応している二つのワイヤレスモデム２０，４０を相互に交換可能とすることで、屋外２００と屋内３００との間における各種の通信方式及びその運用周波数帯域の相違を吸収することができる。 According to the present embodiment, the combination of the commercially available wireless modem 20 and the femtocell base station 30 makes it possible to reduce the cost of the converter 10 that can absorb the difference in the communication method and the operating frequency band between the outdoor 200 and the indoor 300. Can be provided. In addition, by making the two wireless modems 20 and 40 compatible with different communication systems interchangeable, it is possible to absorb differences in various communication systems and operating frequency bands between the outdoor 200 and the indoor 300. can do.
１０…変換装置
２０…ワイヤレスモデム
２１…無線通信部
２２…変換部
３０…フェムトセル基地局
３１…無線通信部
３２…変換部
４０…ワイヤレスモデム
４１…無線通信部
４２…変換部
５０…コントロールボード
５１…ＵＳＢケーブル
５２…ＬＡＮケーブル
５３…ＬＡＮケーブル
６０…ＡＣアダプタ
６１…電源ケーブル
７０…遮蔽部材
８０…筐体
９０…窓
２００…屋外
３００…屋内 DESCRIPTION OF SYMBOLS 10 ... Conversion apparatus 20 ... Wireless modem 21 ... Wireless communication part 22 ... Conversion part 30 ... Femtocell base station 31 ... Wireless communication part 32 ... Conversion part 40 ... Wireless modem 41 ... Wireless communication part 42 ... Conversion part 50 ... Control board 51 ... USB cable 52 ... LAN cable 53 ... LAN cable 60 ... AC adapter 61 ... Power cable 70 ... Shielding member 80 ... Case 90 ... Window 200 ... Outdoor 300 ... Indoor

Claims (9)

  1. 　第一の周波数帯域で運用されている第一の通信方式の無線信号を屋外から受信する第一の無線通信部と、
    　前記受信した第一の通信方式の無線信号を第二の周波数帯域で運用されている第二の通信方式の無線信号に変換する変換部と、
    　前記変換された第二の通信方式の無線信号を屋内に送信する第二の無線通信部と、
    　を備える変換装置。     A first wireless communication unit that receives a wireless signal of the first communication method operated in the first frequency band from the outside;
    A converter that converts the received wireless signal of the first communication method into a wireless signal of the second communication method operated in the second frequency band;
    A second wireless communication unit for transmitting the converted wireless signal of the second communication method indoors;
    A conversion device comprising:
  2. 　請求項１に記載の変換装置であって、
    　前記第二の無線通信部は、前記第二の通信方式の無線信号を前記屋内から受信し、
    　前記変換部は、前記受信した第二の通信方式の無線信号を前記第一の通信方式の無線信号に変換し、
    　前記第一の無線通信部は、前記変換された第一の通信方式の無線信号を前記屋外に送信する、変換装置。     The conversion device according to claim 1,
    The second wireless communication unit receives the wireless signal of the second communication method from the indoor,
    The converter converts the received wireless signal of the second communication method into the wireless signal of the first communication method,
    The first wireless communication unit is a conversion device that transmits the converted wireless signal of the first communication method to the outdoors.
  3. 　第一の周波数帯域で運用されている第一の通信方式の無線信号を屋外から受信しこれをインターネットプロトコルに準拠した信号に変換するワイヤレスモデムと、
    　前記インターネットプロトコルに準拠した信号を第二の周波数帯域で運用されている第二の通信方式の無線信号に変換しこれを屋内に送信するフェムトセル基地局と、
    　を備える変換装置。     A wireless modem that receives a radio signal of the first communication method operated in the first frequency band from the outside and converts it to a signal that conforms to the Internet protocol;
    A femtocell base station that converts a signal conforming to the Internet protocol into a radio signal of a second communication method operated in a second frequency band and transmits the signal indoors;
    A conversion device comprising:
  4. 　請求項３に記載の変換装置であって、
    　前記フェムトセル基地局は、前記第二の通信方式の無線信号を前記屋内から受信してこれをインターネットプロトコルに準拠した信号に変換し、
    　前記ワイヤレスモデムは、前記インターネットプロトコルに準拠した信号を前記第一の通信方式の無線信号に変換してこれを前記屋外に送信する、変換装置。     The conversion device according to claim 3,
    The femtocell base station receives the radio signal of the second communication method from the indoor and converts it into a signal conforming to the Internet protocol,
    The wireless modem converts a signal conforming to the Internet protocol into a wireless signal of the first communication method and transmits the signal to the outdoors.
  5. 　請求項３又は請求項４に記載の変換装置であって、
    　前記ワイヤレスモデムは、前記屋内の窓又はその周辺に取り付けられている、変換装置。     The conversion device according to claim 3 or claim 4,
    The wireless modem is a conversion device attached to the indoor window or its periphery.
  6. 　請求項３乃至請求項５のうち何れか１項に記載の変換装置であって、
    　前記フェムトセル基地局は、前記第二の通信方式の無線信号の前記屋外への漏洩を防ぐための遮蔽部材を更に備える、変換装置。     A conversion device according to any one of claims 3 to 5,
    The femtocell base station further includes a shielding member for preventing leakage of the radio signal of the second communication method to the outdoors.
  7. 　請求項３乃至請求項６のうち何れか１項に記載の変換装置であって、
    　前記ワイヤレスモデム及び前記フェムトセル基地局を収容する筐体を更に備える、変換装置。     A conversion device according to any one of claims 3 to 6,
    A conversion apparatus further comprising a housing for accommodating the wireless modem and the femtocell base station.
  8. 　請求項３乃至請求項７のうち何れか１項に記載の変換装置であって、
    　前記ワイヤレスモデムは、第三の周波数帯域で運用されている第三の通信方式の無線信号を屋外から受信しこれをインターネットプロトコルに準拠した信号に変換してこれを前記フェムトセル基地局に供給するとともに、前記フェムトセル基地局から供給されるインターネットプロトコルに準拠した信号を前記第三の通信方式の無線信号に変換してこれを屋外に送信するワイヤレスモデムに交換可能である、変換装置。     The conversion device according to any one of claims 3 to 7,
    The wireless modem receives a radio signal of the third communication method operated in the third frequency band from the outside, converts it into a signal conforming to the Internet protocol, and supplies it to the femtocell base station In addition, a conversion device capable of exchanging a signal conforming to the Internet protocol supplied from the femtocell base station into a radio signal of the third communication method and transmitting the signal to the outdoors.
  9. 　第一の周波数帯域で運用されている第一の通信方式の無線信号を屋外から受信し、
    　前記受信した第一の通信方式の無線信号を第二の周波数帯域で運用されている第二の通信方式の無線信号に変換し、
    　前記変換された第二の通信方式の無線信号を屋内に送信する、変換方法。
          Receives the radio signal of the first communication method operated in the first frequency band from the outside,
    Converting the received wireless signal of the first communication method into a wireless signal of the second communication method operated in the second frequency band;
    A conversion method of transmitting the converted radio signal of the second communication method indoors.
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