WO2013179363A1 - 光無線伝送装置および光無線伝送方法ならびに光無線伝送システム - Google Patents
光無線伝送装置および光無線伝送方法ならびに光無線伝送システム Download PDFInfo
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- WO2013179363A1 WO2013179363A1 PCT/JP2012/008290 JP2012008290W WO2013179363A1 WO 2013179363 A1 WO2013179363 A1 WO 2013179363A1 JP 2012008290 W JP2012008290 W JP 2012008290W WO 2013179363 A1 WO2013179363 A1 WO 2013179363A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- the present invention relates to an optical wireless transmission device, an optical wireless transmission method, and an optical wireless transmission system, and more particularly to an optical wireless transmission device and an optical device that receive a signal from a control system and determine in which direction and at which frequency an input signal is transmitted.
- the present invention relates to a wireless transmission method and an optical wireless transmission system.
- the system is divided for optical transmission and wireless transmission.
- optical transmission systems there was an optical switching device with a wavelength selection function that enables transmission to an arbitrary path by selecting an arbitrary wavelength, but the function of selecting a wireless transmission path as an option for the path is Did not exist.
- a communication path switching system capable of changing a transmission path from an optical communication path to a wireless communication path is disclosed (for example, see Patent Document 1).
- This system is capable of securing a communication path even when a communication failure occurs in a wired communication path that connects a communication device used by a user and a network.
- the present invention relates to a communication system.
- communication between the subscriber line switch and each communication device is usually performed using a single-core optical fiber between each communication device from the communication channel switching device.
- the subscriber line exchange communicates with each communication device wirelessly via a wireless communication unit in the communication path switching device.
- the optical transmission or the wireless transmission is properly used according to the opposite device that performs communication, and any frequency and any route from a plurality of frequencies are used.
- Patent Document 1 merely discloses a technique for switching from optical transmission to wireless transmission when a failure occurs, and completely discloses a technique for selectively using optical transmission or wireless transmission according to the opposite device. Absent. Therefore, the invention described in Patent Document 1 cannot solve the problem of the present invention.
- an object of the present invention is to use optical transmission or wireless transmission properly according to the opposite device that performs communication, select an arbitrary frequency and an arbitrary path from a plurality of frequencies, and further multiplex signals as necessary.
- an optical wireless transmission device, an optical wireless transmission method, and an optical wireless transmission system capable of communicating with an opposite device are provided.
- an optical wireless transmission device converts a plurality of input baseband signals into optical or electrical signals as necessary, modulates these signals at different frequencies, and further, a predetermined number of signals.
- the optical modulation signals are multiplexed with each other and a predetermined number of radio modulation signals are multiplexed, and the optical multiplexed signal is transmitted to the opposite device via a predetermined optical fiber, and the radio multiplexed signal is transmitted to the opposite device via a directional antenna.
- the optical wireless transmission method converts a plurality of input baseband signals into optical or electrical signals as necessary, modulates these signals at different frequencies, respectively, and further adds a predetermined number of optical modulation signals to each other.
- a plurality of optical modulation signals are multiplexed with each other, and the optical multiplexed signal includes an optical wireless transmission step in which the optical multiplexed signal is transmitted to a counter device via a predetermined optical fiber and the wireless multiplexed signal is transmitted to a counter device via a directional antenna. .
- An optical wireless transmission system includes an optical wireless transmission device, a control system that instructs the optical wireless transmission device in which direction and at which frequency an input baseband signal is transmitted, and one optical wireless And an optical branching device that separates the optical multiplexed signal output from the transmission device and outputs the separated optical multiplexed signal to the other plurality of optical wireless transmission devices.
- the program according to the present invention converts a plurality of input baseband signals into optical or electrical signals as necessary in the control circuit of the optical wireless transmission apparatus, modulates these signals at different frequencies, and further, a predetermined number of signals.
- optical transmission or wireless transmission is properly used according to the opposite device that performs communication, an arbitrary frequency and an arbitrary path are selected from a plurality of frequencies, and signals are multiplexed as necessary. It is possible to communicate with the opposite device. This makes it possible to select the optimal frequency, route, and medium (optical or wireless) according to the network conditions, so that limited transmission resources (optical transmission path and spatial frequency) can be used to the maximum extent possible. Possible
- FIG. 1 is a block diagram of an example of an optical wireless transmission system according to the present invention.
- an example of an optical wireless transmission system includes a plurality of optical wireless transmission apparatuses 1 (1-1 to 1-4 as an example), an optical branching apparatus 2, and a plurality of optical fibers 3 to 5, a control system 6, and a plurality of directional antennas 18 (18-1 to 18-2 as an example).
- the optical wireless transmission device 1-1 is connected to the optical branching device 2 via the optical fiber 3, and the optical branching device 2 is further connected to the optical wireless transmission device 1-3 via the optical fiber 4 and the optical fiber 5.
- the optical wireless transmission device 1-1 includes a directional antenna 18-1
- the optical wireless transmission device 1-2 also includes a directional antenna 18-2, between the optical wireless transmission devices 1-1 and 1-2. Wireless transmission is performed.
- the optical wireless transmission apparatuses 1-1 and 1-2 are provided with the directional antennas 18-1 and 18-2.
- the apparatus 1 is provided.
- an optical fiber is not connected between the optical wireless transmission apparatuses 1-1 and 1-2, but an optical fiber is connected between the optical wireless transmission apparatuses 1-1 and 1-2. It is also possible to do.
- the control system 6 instructs the optical wireless transmission apparatuses 1-1 to 1-4 in which direction and at what frequency the input baseband signal (whether it is an optical signal or an electrical signal) is transmitted. .
- wireless transmission is performed between the optical wireless transmission apparatuses 1-1 and 1-2, and an optical fiber is transmitted between the optical wireless transmission apparatus 1-1 and the optical branching apparatus 2.
- 3 performs optical multiplex transmission of wavelengths ⁇ 1 and ⁇ 2, further separates the optical multiplexed signals of wavelengths ⁇ 1 and ⁇ 2 by optical branching device 2, and optically transmits optical signals of wavelength ⁇ 1 via optical fiber 4.
- the optical signal having the wavelength ⁇ 2 is optically transmitted to the optical device 1-3 through the optical fiber 5 to the optical wireless transmission device 1-4.
- the signal transmission path shown in FIG. 1 is an example of a path instructed from the control system 6 to each of the optical wireless transmission apparatuses 1-1 to 1-4, and is not limited to this example.
- the control system 6 can set a transmission path so that any optical wireless transmission device 1 can communicate with each other, and selects an optimal frequency, route and medium (light or wireless) according to the network conditions. Is possible.
- a control signal for adjusting the frequency of the optical wireless transmission device 1 facing the own optical wireless transmission device 1 is added in advance to the communication data between the two.
- the control signal is added to the communication data based on an instruction from the control system 6.
- the control system 6 sets an optimum transmission path and selects an optimum frequency.
- FIG. 2 is a block diagram of an example of an optical wireless transmission apparatus according to the present invention.
- an example of an optical wireless transmission apparatus includes a plurality of baseband signal input / output circuits 11-1 to 11-m (m is a positive integer), a switching circuit 12, and a plurality of wireless Input / output circuits 13-1 to 13-n (n is a positive integer), a plurality of optical input / output circuits 14-1 to 14-p (p is a positive integer), a frequency selection / switching / multiplexing circuit 15, A terminal selection / switching / multiplexing circuit 16, a control circuit 17, a directional antenna 18, optical fibers 19-1 to 19-r (r is a positive integer), and a program storage unit 20.
- the baseband signal input / output circuits 11-1 to 11-m a positive integer
- switching circuit 12 includes a plurality of wireless Input / output circuits 13-1 to 13-n (n is a positive integer), a plurality of optical input / output circuits 14-1 to 14-p (p is a positive integer), a frequency selection / switching / multiplexing circuit 15,
- Baseband signal input / output circuits 11-1 to 11-m convert input baseband signals into optical or electrical signals as necessary and input / output them. That is, the input baseband signal is an optical or electric signal, and the baseband signal input / output circuits 11-1 to 11-m convert the input optical baseband signal to electricity, or the input electric baseband signal to light. Each has an optical / electrical conversion function for conversion.
- the switching circuit 12 converts the baseband signals output from the baseband signal input / output circuits 11-1 to 11-m into optical or electrical signals as necessary, and outputs a predetermined output destination, that is, a wireless input / output circuit 13- 1 to 13-n and the optical input / output circuits 14-1 to 14-p.
- the switching circuit 12 converts the baseband signals output from the wireless input / output circuits 13-1 to 13-n and the optical input / output circuits 14-1 to 14-p into optical or electrical signals as necessary.
- a function of outputting to the baseband signal input / output circuits 11-1 to 11-m is also provided.
- the radio input / output circuits 13-1 to 13-n modulate the electric baseband signal output from the switching circuit 12 with different frequencies, or demodulate the radio modulation signal output from the frequency selection / switching / multiplexing circuit 15, respectively. To do.
- the optical input / output circuits 14-1 to 14-p modulate the optical baseband signals output from the switching circuit 12 at different frequencies, or demodulate the optical modulation signals output from the terminal selection / switching / multiplexing circuit 16, respectively. To do.
- the optical input / output circuits 14-1 to 14-p include a light source and a light receiving element (not shown). Accordingly, the optical input / output circuits 14-1 to 14-p also have an electrical / optical conversion function.
- the frequency selection / switching / multiplexing circuit 15 multiplexes radio modulation signals output from a predetermined number of the plurality of radio input / output circuits 13-1 to 13-, and transmits the multiplexed signals to the opposite device via the directional antenna 18. To do. Further, the frequency selection / switching / multiplexing circuit 15 has a function of separating a radio multiplexed signal received via the directional antenna 18 and outputting it to a predetermined radio input / output circuit 13.
- the terminal selection / switching / multiplexing circuit 16 multiplexes optical modulation signals output from a predetermined number of circuits among the plurality of optical input / output circuits 14-1 to 14-p, and passes through a predetermined optical fiber 19 to the opposite device. Transmit to.
- the terminal selection / switching / multiplexing circuit 16 has a function of separating optical multiplexed signals received via the optical fibers 19-1 to 19-r and outputting them to a predetermined optical input / output circuit 14.
- the control circuit 17 controls the radio input / output circuits 13-1 to 13-n and the optical input / output circuits 14-1 to 14-p to perform frequency selection, modulation / demodulation, baseband signal input / output circuit 11, switching circuit 12 Then, the frequency selection / switching / multiplexing circuit 15 and the terminal selection / switching / multiplexing circuit 16 are controlled to transmit optical and radio signals to arbitrary paths.
- FIG. 3 is a flowchart showing an example of an optical wireless transmission method of the optical wireless transmission apparatus according to the present invention.
- control circuit 17 controls the baseband signal input / output circuit 11, the switching circuit 12, the frequency selection / switching / multiplexing circuit 15, and the terminal selection / switching / multiplexing circuit 16.
- the plurality of baseband signal input / output circuits 11- to 11-m convert the input baseband signals into optical or electrical signals as necessary and input / output them (step S1).
- the switching circuit 12 converts the baseband signal output from the baseband signal input / output circuit 11 into an optical or electrical signal as necessary, and outputs it to a predetermined output destination (step S2).
- the plurality of radio input / output circuits 13 modulate the electric baseband signals output from the switching circuit 12 at different frequencies or demodulate the radio modulation signals (step S3).
- the plurality of optical input / output circuits 14 modulate the optical baseband signals output from the switching circuit 12 at different frequencies or demodulate the optical modulation signals (step S4).
- the frequency selection / switching / multiplexing circuit 15 multiplexes radio modulation signals output from a predetermined number of circuits among the plurality of radio input / output circuits 13, and transmits the multiplexed signals to the opposite device via the directional antenna 18 (step S5).
- the terminal selection / switching / multiplexing circuit 16 multiplexes the optical modulation signals output from a predetermined number of the plurality of optical input / output circuits 14 and transmits the multiplexed signals to the opposite device via the predetermined optical fiber 19 (step S6). ).
- a plurality of wired and wireless transmission means can be freely selected.
- limited resources can be effectively utilized by freely selecting the wavelength of light and the frequency of radio.
- the optical fiber resources in the limited section can be effectively used by multiplexing the light outputs having different wavelengths.
- resources in the wireless section can be effectively utilized by multiplexing a plurality of wavelengths and transmitting via a common antenna. Furthermore, by having a system for selecting an optimal transmission path and optical wavelength / radio frequency according to the network conditions, it becomes possible to optimize optical / radio transmission resources.
- the optical wireless transmission apparatus includes a program storage unit 20.
- the program storage unit 20 stores a program of the optical wireless transmission method shown in the flowchart of FIG.
- the control circuit 17 of the optical wireless transmission apparatus reads the program from the program storage unit 20, and in accordance with the program, the baseband signal input / output circuit 11, the switching circuit 12, the frequency selection / switching / multiplexing circuit 15, and the terminal selection / switching / The multiplexing circuit 16 is controlled. Since the contents of the control have already been described, description thereof is omitted here.
- the program stored in the program storage unit 20 includes a design program for grasping traffic conditions and network conditions and selecting an optimal frequency and route and medium (optical or wireless).
- optical transmission or wireless transmission is properly used according to the opposite device that performs communication, an arbitrary frequency and an arbitrary path are selected from a plurality of frequencies, and further, as necessary.
- a program of an optical wireless transmission method capable of multiplexing signals and communicating with the opposite apparatus is obtained.
- the present invention can be applied to a transmission network introduced by a mobile business operator.
- Non-transitory computer readable media include various types of tangible storage media.
- Examples of non-transitory computer-readable media include magnetic recording media (eg, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg, magneto-optical disks), CD-ROM (Read Only Memory) CD-R, CD -R / W, including semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (Random Access Memory)).
- the program may be supplied to a computer by various types of temporary computer readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves.
- the temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.
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Abstract
Description
2 光分岐装置
3~5 光ファイバ
6 制御システム
11 ベースバンド信号入出力回路
12 切替回路
13 無線入出力回路
14 光入出力回路
15 周波数選択/切替/多重回路
16 端子選択/切替/多重回路
17 制御回路
18 指向性アンテナ
19 光ファイバ
20 プログラム格納部
Claims (8)
- 複数の入力ベースバンド信号を必要に応じて光または電気信号に変換し、それらの信号を夫々異なる周波数で変調し、さらに所定数の光変調信号同士および所定数の無線変調信号同士を多重し、光多重信号は所定の光ファイバを介してまた無線多重信号は指向性アンテナを介して夫々対向装置へ伝送することを特徴とする光無線伝送装置。
- 前記対向装置から送信される光多重信号および無線多重信号を分離して復調し、さらに復調後のベースバンド信号を必要に応じて光または電気信号に変換することを特徴とする請求項1記載の光無線伝送装置。
- 入力ベースバンド信号を必要に応じて光または電気信号に変換して入出力する複数のベースバンド信号入出力回路と、
前記ベースバンド信号入出力回路から出力されるベースバンド信号を必要に応じて光または電気信号に変換し所定の出力先に出力する切替回路と、
前記切替回路から出力される電気ベースバンド信号を夫々異なる周波数で変調しまたは無線変調信号を復調する複数の無線入出力回路と、
前記切替回路から出力される光ベースバンド信号を夫々異なる周波数で変調しまたは光変調信号を復調する複数の光入出力回路と、
前記複数の無線入出力回路のうち所定数の回路から出力される無線変調信号を多重し、指向性アンテナを介して対向装置へ伝送する周波数選択/切替/多重回路と、
前記複数の光入出力回路のうち所定数の回路から出力される光変調信号を多重し、所定の光ファイバを介して対向装置へ伝送する端子選択/切替/多重回路と、
前記無線入出力回路および光入出力回路を制御して周波数選択および変復調を行い、前記ベースバンド信号入出力回路、切替回路、周波数選択/切替/多重回路および端子選択/切替/多重回路を制御して光および無線信号を任意の方路へ伝送させる制御回路とを含むことを特徴とする請求項1または2記載の光無線伝送装置。 - 複数の入力ベースバンド信号を必要に応じて光または電気信号に変換し、それらの信号を夫々異なる周波数で変調し、さらに所定数の光変調信号同士および所定数の無線変調信号同士を多重し、光多重信号は所定の光ファイバを介してまた無線多重信号は指向性アンテナを介して夫々対向装置へ伝送する光無線伝送ステップを含むことを特徴とする光無線伝送装置の光無線伝送方法。
- 前記対向装置から送信される光多重信号および無線多重信号を分離して復調し、さらに復調後のベースバンド信号を必要に応じて光または電気信号に変換することを特徴とする請求項4記載の光無線伝送方法。
- 入力ベースバンド信号を必要に応じて光または電気信号に変換して入出力する複数のベースバンド信号入出力ステップと、
前記ベースバンド信号入出力ステップから出力されるベースバンド信号を必要に応じて光または電気信号に変換し所定の出力先に出力する切替ステップと、
前記切替ステップから出力される電気ベースバンド信号を夫々異なる周波数で変調しまたは無線変調信号を復調する複数の無線入出力ステップと、
前記切替ステップから出力される光ベースバンド信号を夫々異なる周波数で変調しまたは光変調信号を復調する複数の光入出力ステップと、
前記複数の無線入出力ステップのうち所定数の回路から出力される無線変調信号を多重し、指向性アンテナを介して対向装置へ伝送する周波数選択/切替/多重ステップと、
前記複数の光入出力ステップのうち所定数の回路から出力される光変調信号を多重し、所定の光ファイバを介して対向装置へ伝送する端子選択/切替/多重ステップとを含むことを特徴とする請求項4または5記載の光無線伝送方法。 - 請求項1から3のいずれかの光無線伝送装置と、前記光無線伝送装置に対し入力ベースバンド信号をどの方向におよびどの周波数で伝送するかを指示する制御システムと、一方の光無線伝送装置から出力される光多重信号を分離して他方の複数の光無線伝送装置へ出力する光分岐装置とを含むことを特徴とする光無線伝送システム。
- 光無線伝送装置の制御回路に、
複数の入力ベースバンド信号を必要に応じて光または電気信号に変換し、それらの信号を夫々異なる周波数で変調し、さらに所定数の光変調信号同士および所定数の無線変調信号同士を多重し、光多重信号は所定の光ファイバを介してまた無線多重信号は指向性アンテナを介して夫々対向装置へ伝送する光無線伝送ステップを実行させるためのプログラムを格納した非一時的なコンピュータ可読媒体。
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EP12878010.3A EP2874320A4 (en) | 2012-05-30 | 2012-12-25 | OPTICAL WIRELESS TRANSMISSION DEVICE, OPTICAL WIRELESS TRANSMISSION METHOD AND OPTICAL WIRELESS TRANSMISSION SYSTEM |
CN201280073592.9A CN104350684B (zh) | 2012-05-30 | 2012-12-25 | 光/无线通信装置、光/无线通信方法和光/无线通信系统 |
US14/400,783 US20150147056A1 (en) | 2012-05-30 | 2012-12-25 | Optical/wireless communication apparatus, optical/wireless communication method and optical/wireless communication system |
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2012
- 2012-12-25 US US14/400,783 patent/US20150147056A1/en not_active Abandoned
- 2012-12-25 CN CN201280073592.9A patent/CN104350684B/zh not_active Expired - Fee Related
- 2012-12-25 EP EP12878010.3A patent/EP2874320A4/en not_active Withdrawn
- 2012-12-25 WO PCT/JP2012/008290 patent/WO2013179363A1/ja active Application Filing
-
2014
- 2014-11-17 IN IN9694DEN2014 patent/IN2014DN09694A/en unknown
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JP2001189962A (ja) * | 1999-12-28 | 2001-07-10 | Ntt Docomo Inc | 無線基地局システム、統括局及び該統括局における信号処理方法 |
JP2001320348A (ja) * | 2000-05-10 | 2001-11-16 | Ntt Docomo Inc | 移動通信用基地局ネットワーク及び前記ネットワークにおける基地局切換え方法 |
JP2002185995A (ja) * | 2000-12-08 | 2002-06-28 | Ntt Docomo Inc | 移動通信システム及びスイッチング装置 |
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Also Published As
Publication number | Publication date |
---|---|
CN104350684B (zh) | 2016-06-08 |
IN2014DN09694A (ja) | 2015-07-31 |
EP2874320A4 (en) | 2016-05-11 |
US20150147056A1 (en) | 2015-05-28 |
CN104350684A (zh) | 2015-02-11 |
EP2874320A1 (en) | 2015-05-20 |
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