WO2017169913A1 - 通信装置および通信方法 - Google Patents
通信装置および通信方法 Download PDFInfo
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- WO2017169913A1 WO2017169913A1 PCT/JP2017/010960 JP2017010960W WO2017169913A1 WO 2017169913 A1 WO2017169913 A1 WO 2017169913A1 JP 2017010960 W JP2017010960 W JP 2017010960W WO 2017169913 A1 WO2017169913 A1 WO 2017169913A1
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- communication device
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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
- H04B10/114—Indoor or close-range type systems
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
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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
- H04B10/112—Line-of-sight transmission over an extended range
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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
- H04B10/40—Transceivers
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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
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/548—Phase or frequency modulation
-
- 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
- H04B10/29—Repeaters
Definitions
- the present invention relates to a communication device and a communication method.
- the present invention relates to a communication device and a communication method constituting a wireless LAN (Local Area Network) network.
- LAN Local Area Network
- a wireless LAN Local Area Network
- the communication band can be secured by reducing the coverage zone by lowering the transmission output of the base station and reducing the number of processes for each base station.
- the zone covered by each base station is made smaller, it is necessary to install as many base stations as there are.
- the number of base stations is increased, there are problems that the number of wired WAN (Wide Area Network) connection points increases and the number of wiring points increases.
- Patent Document 1 discloses a wireless communication system in which wireless signals are exchanged between base stations constituting a wireless LAN network. According to the wireless communication system of Patent Document 1, since the base stations are wirelessly connected, the wiring between the base stations can be reduced.
- An object of the present invention is to provide a communication device that realizes a wireless communication environment that secures a sufficient communication band while reducing the number of wired connection points in order to solve the above-described problems.
- the communication apparatus performs wireless signal transmission / reception, wireless communication means for transmitting / receiving spatial light as communication light, signal conversion in the process of conversion between wireless signal and communication light, and wireless signal and communication.
- Control means for setting a light transmission destination.
- wireless communication means for transmitting / receiving a wireless signal
- optical communication means for transmitting / receiving spatial light as communication light
- signal conversion in a conversion process between the wireless signal and communication light A plurality of communication devices including a control unit that sets a transmission destination of communication light are arranged, and control is performed so that different communication devices communicate with each other using communication light.
- the present invention it is possible to provide a communication device that realizes a wireless communication environment that reduces the number of wired connection points and secures a sufficient communication band.
- 1 is a conceptual diagram of a communication system according to a first embodiment of the present invention. It is a block diagram of the communication apparatus (relay device) which concerns on the 1st Embodiment of this invention. It is a block diagram of the optical communication part of the communication apparatus (relay device) which concerns on the 1st Embodiment of this invention. It is a block diagram of the light transmitter contained in the optical communication part of the communication apparatus (relay device) which concerns on the 1st Embodiment of this invention. It is a block diagram of the radio
- 1 is a block diagram of a communication device (router) according to a first embodiment of the present invention. It is a block diagram of the relay control part of the communication apparatus (router) which concerns on the 1st Embodiment of this invention. It is a block diagram of the modification of the communication apparatus (router) which concerns on the 1st Embodiment of this invention. It is a block diagram of the control system which implement
- the components having “part” at the end are combinations of arithmetic circuits, control circuits, storage circuits, input / output circuits, etc., and hardware such as light sources and light receivers. These components exhibit functions specific to each component based on the set algorithm and program.
- FIG. 1 is a conceptual diagram showing a configuration of a wireless local area network (LAN) network according to the present embodiment.
- LAN wireless local area network
- the wireless LAN network (also referred to as a communication network) of the present embodiment includes a communication device 1 and a communication device 2.
- the communication terminal 200 can be connected to the backbone network 300 via a wireless LAN network including the communication device 1 and the communication device 2.
- the communication terminal 200 may be included in the wireless LAN network according to the present embodiment.
- FIG. 1 shows only one communication device 1 and one communication device 2, but a wireless LAN environment is constructed with a configuration in which at least one communication device 1 and a plurality of communication devices 2 are combined. It is preferable.
- the communication device 1 has a function of a wireless LAN network repeater.
- the communication device 1 is connected to the communication terminal 200 by wireless communication according to a general communication standard.
- the communication device 1 communicates with other communication devices 1 and 2 by transmitting and receiving light through spatial transmission without passing through a wired cable such as an optical cable.
- a wired cable such as an optical cable.
- the light transmitted and received by spatial transmission without passing through a wired cable is referred to as spatial light
- the spatial light used for communication is referred to as communication light 100.
- the communication device 1 uses high directivity spatial light such as laser light as the communication light 100.
- the communication device 2 has a wireless LAN network router function.
- the communication device 2 communicates with the communication device 1 using the communication light 100.
- the communication device 2 is connected to a backbone network 300 such as the Internet by wire.
- the communication device 2 is connected to the backbone network 300 by a wired cable 310 such as an optical cable or a power transmission line according to a general communication standard.
- the communication device 1 includes an antenna 11, a wireless communication unit 12, a relay control unit 13, and an optical communication unit 14.
- FIG. 2 illustrates an example in which the communication device 1 and the communication device 2 communicate with each other using the communication light 100, but different communication devices 1 communicate with each other or different communication devices 2 communicate with each other. It may fit.
- the antenna 11 is an antenna for transmitting and receiving radio signals to and from the communication terminal 200.
- the antenna 11 only needs to have a shape, function, and performance that conform to the communication standard with the communication terminal 200.
- the wireless communication unit 12 (also referred to as wireless communication means) has a function of amplifying an RF (Radio-Frequency) signal received by the antenna 11 and performing orthogonal demodulation to an OFDM (Orthogonal-frequency-division-multiplexing) signal.
- the wireless communication unit 12 outputs the demodulated signal to the relay control unit 13. Further, the wireless communication unit 12 orthogonally modulates the OFDM signal acquired from the relay control unit 13 to an RF signal, or amplifies the power of the RF signal to be transmitted.
- the wireless communication unit 12 may appropriately add, change, or delete functions and performance according to the communication standard and communication method.
- the relay control unit 13 (also referred to as a relay control unit) converts the demodulated signal for transmission to another communication device or the communication device 2.
- the relay control unit 13 converts the OFDM signal demodulated by the wireless communication unit 12 into an IP (Internet Protocol) packet, or converts an IP packet corresponding to the communication light 100 received by the optical communication unit 14 into an OFDM signal.
- IP Internet Protocol
- the relay control unit 13 may appropriately add, change, or delete functions and performance according to the communication standard and communication method.
- the optical communication unit 14 (also referred to as an optical communication unit) converts the signal demodulated by the wireless communication unit 12 into an optical signal, and transmits the communication light 100 corresponding to the optical signal to another communication device 1 or 2. It has a function to shine.
- the optical communication unit 14 has a function of receiving the communication light 100 from another communication device 1 or the communication device 2 and converting the signal light corresponding to the communication light 100 into an electrical signal.
- FIG. 3 is a block diagram illustrating a configuration of the optical communication unit 14.
- the optical communication unit 14 includes an input / output unit 141, a light transmission control circuit 142, a light transmitter 143, a storage circuit 144, a light receiver 145, and a light reception control circuit 146.
- the input / output unit 141 receives an electrical signal from the relay control unit 13 and outputs the electrical signal to the light transmission control circuit 142, and is converted from an optical signal corresponding to the communication light 100 from the other communication device 1 or the communication device 2. It is an interface that outputs an electrical signal to the relay control unit 13. Note that the input / output unit 141 may be configured with separate devices for the input function and the output function.
- the light transmission control circuit 142 controls the light transmitter 143 based on the electrical signal acquired from the input / output unit 141, and transmits the communication light 100 from the light transmitter 143 toward the other communication devices 1 and 2. This is a control circuit that emits light.
- the light transmission control circuit 142 controls the light transmitter 143 to transmit the communication light 100 based on the light transmission conditions stored in the storage circuit 144.
- the light transmitter 143 transmits the communication light 100 toward another communication device 1 or the communication device 2 according to the control of the light transmission control circuit 142.
- the light transmitter 143 includes a light source such as a laser diode or a light emitting diode that emits light with high directivity.
- the light transmitter 143 can transmit the communication light 100 (spatial light) using a laser light source such as a laser diode.
- the storage circuit 144 stores the light transmission conditions of the light transmitter 143.
- the light transmission condition is a condition for setting to which communication device 1 or communication device 2 the communication light 100 is transmitted according to the situation. For example, the communication light 100 is transmitted to the communication device 1 that is close in normal times, the communication light 100 is transmitted to another communication device 1 when the communication light 100 is interrupted, and the remote communication device 2 is transmitted in an emergency.
- a light transmission condition corresponding to the situation may be set, such as transmitting the communication light 100 directly.
- the light receiver 145 receives the communication light 100 from the other communication device 1 or the communication device 2.
- a light receiving element such as a photodiode, CMOS (Complementary Metal-Oxide-Semiconductor), CCD (Charge Coupled Device), or an imaging device can be applied.
- the light receiver 145 may be configured by an element other than the above-described light receiving element or imaging element.
- the light receiver 145 may have a function of converting an optical signal corresponding to the received communication light 100 into an electrical signal.
- the light reception control circuit 146 converts the communication light 100 received by the light receiver 145 into an electrical signal and outputs it to the input / output unit 141. If the light receiver 145 can convert the communication light 100 into an electrical signal, the light receiver 145 and the light reception control circuit 146 need not be distinguished.
- FIG. 4 is a block diagram showing the configuration of the light transmitter 143. As illustrated in FIG. 4, the light transmitter 143 includes a light source driving unit 431 and a light source 432.
- the light source driving unit 431 is a driving mechanism including a power source that drives the light source 432.
- the light source driving unit 431 drives the light source 432 according to the control of the light transmission control circuit 142.
- the light source driving unit 431 may be controlled to turn on / off the light source 432 in accordance with “1” and “0” of the electrical signal.
- the light source 432 is a light source that transmits the communication light 100.
- the light source 432 transmits communication light according to the driving of the light source driving unit 431.
- the light source 432 is a light source including a laser diode or a light emitting diode. Note that the light source 432 may emit light by an element or device other than the laser diode or the light emitting diode as long as the communication light 100 can be transmitted.
- FIG. 5 is a block diagram illustrating a configuration example of the wireless communication unit 12. Note that the configuration of FIG. 5 is an example for realizing the communication device 1 according to the present embodiment, and does not limit the scope of the present invention.
- the wireless communication unit 12 includes a duplexer 121, a low noise amplification unit 122, a reception unit 123, a quadrature modulation / demodulation unit 124, a transmission unit 125, and a power amplification unit 126.
- the quadrature modulation / demodulation unit 124 is connected to the relay control unit 13 through an interface (not shown).
- the duplexer 121 (DUP: Duplexer) functions as a transmission / reception filter and is an electronic component for simultaneously exchanging an RF signal transmitted from the inside of the apparatus and an RF signal received from the communication terminal 200.
- the duplexer 121 is connected to the antenna 11 via a cable or wiring.
- the low noise amplification unit 122 selectively amplifies the weak RF signal received by the antenna 11 and outputs the amplified RF signal to the reception unit 123.
- LNA Low Noise Amplifier
- the receiving unit 123 converts the received RF signal into a frequency to be processed by the orthogonal modulation / demodulation unit 124, and outputs the converted RF signal to the orthogonal modulation / demodulation unit 124.
- the orthogonal modulation / demodulation unit 124 orthogonally demodulates and outputs the RF signal converted by the reception unit 123 to the OFDM signal processed by the relay control unit 13. Further, the orthogonal modulation / demodulation unit 124 orthogonally modulates the OFDM signal output from the relay control unit 13 into an RF signal and outputs the result to the transmission unit 125.
- the transmission unit 125 converts the RF signal modulated by the orthogonal modulation / demodulation unit 124 into a frequency transmitted from the antenna 11.
- the power amplifying unit 126 amplifies the power for transmitting the RF signal converted by the transmitting unit 125 from the antenna 11.
- the relay control unit 13 includes a signal conversion unit 131, a light transmission condition generation unit 132, an input / output unit 133, a relay control circuit 134, and a storage unit 135.
- the signal conversion unit 131 converts the signal output from the quadrature modulation / demodulation unit 124 of the wireless communication unit 12 into a signal format to be transmitted to another communication device 1 or the communication device 2.
- the signal conversion unit 131 converts an electrical signal generated from an optical signal corresponding to the communication light 100 received from another communication device 1 or the communication device 2 into a format to be processed by the wireless communication unit 12.
- the light transmission condition generation unit 132 generates a light transmission condition for transmitting the signal converted by the signal conversion unit 131 as the communication light 100.
- the light transmission conditions generated by the light transmission condition generation unit 132 may be stored in the storage circuit 144 of the optical communication unit 14. If it is not necessary to generate the light transmission condition again, the light transmission condition generation unit 132 may be omitted.
- the input / output unit 133 is an interface for exchanging signals with the optical communication unit 14.
- the relay control circuit 134 sets the transmission destination of the communication light 100 generated from the RF signal received from the communication terminal 200 based on the settings stored in the storage unit 135, and other communication devices 1 and 2. The next transmission destination of the communication light 100 received from is set.
- the storage unit 135 is a storage circuit that stores settings related to the transmission destination of the communication light 100. Note that the storage unit 135 may store information that is not a setting related to the transmission destination of the communication light 100.
- the communication device 2 includes a router control unit 23, an optical communication unit 24, and a backbone connection unit 25.
- the router control unit 23 (also referred to as router control means) converts the signal light corresponding to the communication light 100 received by the optical communication unit 24 into an electrical signal, and sets a transmission destination via the backbone network 300.
- the router control unit 23 transmits an electrical signal to the backbone network 300 in accordance with a general router communication standard.
- the optical communication unit 24 (also referred to as an optical communication unit) converts the electrical signal into the communication light 100 according to the conditions set by the router control unit 23 and transmits the communication light 100 to the other communication device 1 or the communication device 2. It has the function to do.
- the optical communication unit 24 has a function of receiving the communication light 100 from another communication device 1 or the communication device 2.
- the optical communication unit 24 has the same configuration as the optical communication unit 14 of the communication device 1.
- the backbone connection unit 25 (also referred to as backbone connection means) is an interface for connecting to the backbone network 300.
- the backbone connection unit 25 has a function of transmitting an electrical signal in accordance with a general router communication standard. Normally, the backbone connection unit 25 is connected to the backbone network 300 by a wired cable 310.
- the backbone network 300 may be an external line such as the Internet or an internal line such as a private LAN.
- the router control unit 23 includes a signal conversion unit 231, a light transmission condition generation unit 232, an input / output unit 233, a router control circuit 234, and a storage unit 235.
- the configuration of the router control unit 23 is the same as that of the relay control unit 13 except for the router control circuit 234.
- the signal conversion unit 231 converts an electrical signal corresponding to the communication light 100 received from another communication device 1 or the communication device 2 into a format to be transmitted from the backbone connection unit 25. In addition, the signal conversion unit 231 converts the signal received via the backbone connection unit 25 into a format for generating the communication light 100.
- the light transmission condition generation unit 232 converts the signal converted by the signal conversion unit 231 into a signal format to be transmitted to another communication device 1 or communication device 2.
- the input / output unit 233 is an interface for exchanging signals with the optical communication unit 24.
- the router control circuit 234 sets the transmission destination of the communication light 100 generated from the signal received from the backbone network 300, or from other communication devices 1 and 2 The next transmission destination of the received communication light 100 is set.
- the storage unit 235 is a storage circuit that stores settings related to the transmission destination of the communication light 100.
- the storage unit 235 may store information that is not a setting related to the transmission destination of the communication light 100.
- the communication device 2 may be configured to include an antenna 21 and a wireless communication unit 22 (communication device 2-2) as shown in FIG.
- the communication device 2-2 in FIG. 9 has both a relay function and a router function.
- the antenna 21 is an antenna for transmitting and receiving a radio signal to and from the communication terminal 200, similarly to the antenna 11.
- the antenna 11 only needs to have a shape, function, and performance that conform to the communication standard with the communication terminal 200.
- the wireless communication unit 22 has a function of amplifying the RF signal received by the antenna 21 and performing orthogonal demodulation on the OFDM signal.
- the wireless communication unit 22 outputs the demodulated signal to the router control unit 23.
- the wireless communication unit 22 orthogonally modulates the OFDM signal acquired from the router control unit 23 with the RF signal, or amplifies the RF signal to be transmitted.
- a relay control function may be added to the router control unit 23. Even if the router control unit 23 is added to the communication device 1 of FIG. 2, the configuration is the same as that of the communication device 2-2 of FIG.
- control system 50 the hardware (control system 50) which implement
- the control system 50 is an example for realizing the communication device 1 and the communication device 2 and does not limit the scope of the present invention.
- the control system 50 includes a processor 51, a main storage device 52, an auxiliary storage device 53, an input / output interface 55, and a network adapter 56.
- the processor 51, main storage device 52, auxiliary storage device 53, input / output interface 55, and network adapter 56 are connected to each other via a bus 59.
- the processor 51, the main storage device 52, the auxiliary storage device 53, and the input / output interface 55 are connected to a network such as an intranet or the Internet via a network adapter 56.
- the control system 50 is connected to another system, device, or sensor via a network.
- the constituent elements of the control system 50 may be single or plural.
- the processor 51 is a central processing unit that expands a program stored in the auxiliary storage device 53 or the like in the main storage device 52 and executes the expanded program. In the present embodiment, a configuration using a software program installed in the control system 50 may be used. The processor 51 executes various arithmetic processes and control processes.
- the main storage device 52 has an area where the program is expanded.
- the main storage device 52 may be a volatile memory such as DRAM (Dynamic Random Access Memory). Further, a nonvolatile memory such as MRAM (Magnetoresistive Random Access Memory) may be configured and added as the main storage device 52.
- DRAM Dynamic Random Access Memory
- MRAM Magnetic Random Access Memory
- the auxiliary storage device 53 is a means for storing various data.
- the auxiliary storage device 53 is configured as a local disk such as a hard disk or a flash memory.
- the main storage device 52 may be configured to store data, and the auxiliary storage device 53 may be omitted.
- the input / output interface 55 is an interface (I / F) that connects the control system 50 and peripheral devices based on a connection standard.
- the control system 50 may be configured so that input devices such as a keyboard, a mouse, and a touch panel can be connected as necessary. These input devices are used for inputting information and settings.
- input devices such as a keyboard, a mouse, and a touch panel
- the display screen of the display device may be a touch panel display that also serves as an interface of the input device.
- Data exchange between the processor 51 and the input device may be mediated by the input / output interface 55.
- the network adapter 56 is an interface for connecting to a backbone network 300 such as the Internet or an intranet based on standards or specifications.
- the input / output interface 55 and the network adapter 56 may be shared as an interface for connecting to an external device.
- FIG. 11 is a conceptual diagram illustrating an example of the appearance of the communication device 1 according to the present embodiment.
- FIG. 11 is an example for realizing the communication device 1 of the present embodiment, and does not limit the scope of the present invention.
- the communication apparatus 1 includes a light transmission window 430 for transmitting the communication light 100 and a light receiving window 450 for receiving the communication light 100.
- the light transmission window 430 and the light receiving window 450 may be shared.
- the external appearance of the communication apparatus 2 can also be comprised similarly to the communication apparatus 1 of FIG.
- FIG. 12 is a conceptual diagram showing a configuration example of a wireless LAN network formed by a plurality of communication devices 1 and communication devices 2.
- the configuration example of FIG. 12 is an example in which a large number of communication devices 1 that can be accessed by the communication terminal 200 through wireless communication are installed. If a large number of communication devices 1 are installed as shown in FIG. 12, a sufficient communication band is secured by setting a narrow zone for each communication device 1.
- the communication devices 1 communicate with each other using the communication light 100. All the communication devices 1 are connected to the backbone network 300 via the communication device 2 having a router function. If the communication device 1 can directly transmit and receive light to and from the communication device 2, the communication light 100 may be directly transmitted to and received from the communication device 2. If the communication device 1 cannot directly transmit / receive light to / from the communication device 2, any one of the communication devices 1 may be relayed to transmit / receive the communication light 100 to / from the communication device 2.
- the communication device 2 having a router function communicates with a plurality of communication devices 1 by communication light 100. As long as direct transmission / reception is possible, the communication device 2 may transmit / receive the communication light 100 directly to / from the communication device 1. If direct transmission / reception is not possible, the communication device 2 may relay any one of the communication devices 1 and transmit / receive the communication light 100 to / from the communication device 1.
- the communication terminal 200 communicates with one of the communication devices 1 by wireless communication.
- the communication terminal 200 communicates with the nearby communication device 1 by wireless communication.
- the communication device 1 communicating with the communication terminal 200 transmits the communication light 100 to and from the communication device 2 having a router function.
- the communication terminal 200 can be connected to the backbone network 300 via the communication device 1 and the communication device 2.
- FIG. 13 is a block diagram illustrating an example of the communication terminal 200.
- the communication terminal 200 includes an antenna 201, a wireless communication unit 202, a communication control unit 203, a terminal control unit 204, and a storage circuit 205. Note that the configuration of FIG. 13 is an example, and does not limit the scope of the present invention.
- the antenna 201 is an antenna for transmitting / receiving a radio signal to / from the communication device 1 or the communication device 2.
- the antenna 201 may be exposed to the outside of the communication terminal 200 or may be stored inside.
- the wireless communication unit 202 has a function of communicating wireless signals with the communication device 1 and the communication device 2 via the antenna 201.
- the communication control unit 203 has a function of performing communication control such as a connection destination search by the wireless communication unit 202 and a connection request to the communication device 1 or the communication device 2.
- the terminal control unit 204 has a function of controlling the entire communication terminal 200.
- the storage circuit 205 is a circuit that stores data and control conditions of the communication terminal 200.
- the communication terminal 200 may include components other than those shown in FIG. Communication terminal 200 may be one in which various functions are added to or modified from the configuration shown in FIG.
- FIGS. 14 to 17 are views of the part shown in the application example of FIG. 12 as viewed from above.
- the seven communication devices 1 having a relay function and a communication device 2 having a router function are installed.
- the seven communication devices 1 include a communication device 1A, a communication device 1B, a communication device 1C, a communication device 1D, a communication device 1E, a communication device 1F, and a communication device 1G.
- the communication device 2 is connected to the backbone network 300 via a wired cable 310.
- FIG. 15 is an example in which the communication terminal 200 is connected to the backbone network 300 via the communication device 1A capable of directly transmitting and receiving the communication device 2 and the communication light 100.
- the communication device 1A transmits and receives radio signals to and from the communication terminal 200 and transmits and receives communication light 100 to and from the communication device 2.
- the communication terminal 200 and the backbone network 300 are connected.
- FIG. 16 shows an example in which the communication terminal 200 is connected to the backbone network 300 via the communication device 1B capable of directly transmitting and receiving the communication device 2 and the communication light 100.
- the communication device 1 ⁇ / b> B transmits and receives radio signals to and from the communication terminal 200 and transmits and receives communication light 100 to and from the communication device 2.
- the communication terminal 200 and the backbone network 300 are connected.
- FIG. 17 shows an example in which the communication terminal 200 is connected to the backbone network 300 via the communication device 1F that cannot directly transmit and receive the communication device 2 and the communication light 100.
- the communication device 1F transmits and receives radio signals to and from the communication terminal 200.
- the communication device 1 ⁇ / b> F relays the communication device 1 ⁇ / b> D and transmits / receives the communication light 100 to / from the communication device 2.
- the communication terminal 200 and the backbone network 300 are connected.
- communication between communication apparatuses constituting the wireless communication network is performed using communication light. Therefore, according to the communication device according to the present embodiment, the number of wired connections between the devices can be reduced.
- the communication apparatus it is possible to reduce interference between communication terminals by reducing the output of radio signals for each apparatus and generating many small zones. Therefore, according to the communication apparatus according to the present embodiment, a sufficient communication band can be secured.
- the communication apparatus it is possible to provide a communication apparatus that realizes a wireless communication environment that secures a sufficient communication band while reducing the number of wired connection locations.
- the present embodiment is different from the first embodiment in that it has a function of changing the light transmission direction and the light reception direction of communication light. Note that the configuration of the communication apparatus according to the present embodiment is the same as that of the first embodiment except for the optical communication unit, and thus detailed description of the same configuration is omitted.
- FIG. 18 is a block diagram showing a configuration of the optical communication unit 14-2 of the present embodiment.
- the optical communication unit 14-2 has a configuration in which a direction changing mechanism 147 and a direction control unit 148 are added to the optical communication unit 14 of the first embodiment.
- the direction changing mechanism 147 and the direction control unit 148 will be described, and description of other configurations will be omitted.
- the optical communication unit 24 of the communication device 2 can be added with a function of changing the light transmission direction and the light reception direction of the communication light 100 by adopting the same configuration as the optical communication unit 14-2.
- the direction changing mechanism 147 is a mechanism that changes the light transmitting direction and the light receiving direction of the communication light 100.
- the direction changing mechanism may be a mechanically operating mechanism or a mechanism that does not include a mechanically operating part.
- the direction changing mechanism 147 may change the light direction and the light receiving direction of the communication light 100 in a coordinated manner, or may operate independently.
- the direction control unit 148 controls the direction changing mechanism 147 according to the control of the light transmission control circuit 142 and the light reception control circuit 146. Therefore, in the present embodiment, it is preferable to add a function for setting the light transmission / reception direction of the communication light 100 to the light transmission control circuit 142 and the light reception control circuit 146.
- FIG. 19 is an example of the appearance of the communication device 1-2 of the present embodiment.
- the communication device 1-2 includes a movable unit 433 (also referred to as a movable unit) that operates mechanically.
- the movable portion 433 is provided with a light transmission window 430 for transmitting the communication light 100 and a light receiving window 450 for receiving the communication light.
- the movable part 433 has a light transmitting window 430 and a light receiving window 450 arranged on the side surface of a columnar support, and forms a pair of shafts at opposing positions on the upper and lower surfaces, and both shafts can be rotated.
- the movable portion 433 may be configured to rotate with respect to the main body by a driving mechanism such as a motor. Then, the direction of the light transmission window 430 and the light receiving window 450 can be changed by rotating the movable part 433 with respect to the main body.
- the center of FIG. 19 shows a state in which the movable part 433 faces the front.
- the left side of FIG. 19 is an example in which the transmission / reception direction is directed to the left side when the movable part 433 is viewed from the front.
- the right side of FIG. 19 is an example in which the transmission / reception direction is directed to the right side when the movable portion 433 is viewed from the front.
- the transmission / reception direction of the communication terminal 200 can be controlled.
- the light transmission window 430 and the light receiving window 450 may not be integrated, and each may move independently.
- the seven communication devices 1-2 include a communication device 1-2A, a communication device 1-2B, a communication device 1-2C, a communication device 1-2D, a communication device 1-2E, a communication device 1-2F, and a communication device 1-. Includes 2G.
- FIG. 20 shows a scene in which an obstacle is located between the communication device 1-2A and the communication device 2-2 and the communication light 100 cannot be directly transmitted and received.
- the relay control unit 13 of the communication device 1-2 detects that there is an obstacle in the transmission / reception path of the communication light 100, and controls to change the communication route of the communication light 100. To do. For example, the relay control unit 13 of the communication device 1-2 determines the presence / absence of a failure based on the presence / absence of response light from the communication device 2-2. That is, the relay control unit 13 of the communication device 1-2 detects that there is an obstacle in the transmission / reception path of the communication light 100 due to the interruption of the optical communication with the communication device 2-2.
- the relay control unit 13 when the relay control unit 13 outputs an instruction signal for changing the communication route of the communication light 100 to the optical communication unit 14-2, the light transmission control circuit 142 or the light reception control circuit 146 controls the direction control unit 148 to change the direction.
- the mechanism 147 is operated. In this control, the transmission / reception direction of the communication light 100 is changed by moving the movable portion 433 as shown in FIG.
- FIG. 21 is an example in which the communication light 100 is transmitted and received between the communication device 1-2A and the communication device 2-2 via the communication device 1-2G.
- the communication device 1-2 and the communication device 2-2 even when an obstacle is located between the communication device 1-2 and the communication device 2-2, the communication device 1-2 and the communication device 2-2.
- the communication light 100 can be transmitted and received between the two. As a result, a line between the communication terminal 200 and the backbone network 300 is established.
- the communication device since the transmission / reception direction of the communication light 100 can be changed, even when the communication light cannot be directly transmitted / received between the repeater and the router, The line between the communication terminal and the backbone network can be established through the repeater. That is, according to this embodiment, the stability of the wireless LAN network can be improved.
- the communication device when a communication terminal or a wireless device that is not a communication target is located on the communication light path, there is a risk that the communication content is intercepted by changing the communication light path. Can be reduced. That is, according to the communication apparatus according to the present embodiment, communication security in the wireless LAN network can be improved.
- the transmission direction of the communication light can be mechanically changed, so that the alignment between the communication devices can be executed accurately and easily.
- the communication apparatus according to the present embodiment includes a spatial light modulation element in the light transmitter.
- the communication apparatus of this embodiment is the same as that of 1st Embodiment except the light transmitter, detailed description about the same structure is abbreviate
- FIG. 22 shows the configuration of the light transmitter 43-3 of this embodiment.
- the light transmitter 43-3 includes a spatial light modulation element 436 and a modulation element control unit 437 (also referred to as modulation element control means).
- the light transmitter 43-3 irradiates the light emitted from the light source 432 to the display unit (also referred to as display means) of the spatial light modulation element 436, and transmits the reflected light as the communication light 100.
- the spatial light modulation element 436 displays a pattern corresponding to the communication light 100 to be transmitted on its own display unit under the control of the modulation element control unit 437.
- the light source 432 irradiates the display unit with parallel light.
- the spatial light modulator 436 reflects the modulated light of the irradiated parallel light.
- the spatial light modulator 436 has a matrix circuit in which a pixel is formed by an electrode such as aluminum on the uppermost layer of an address circuit formed on a substrate such as a silicon substrate, and the potential of each pixel can be controlled independently.
- the spatial light modulator 436 has a structure in which a liquid crystal material is interposed between a transparent substrate such as glass provided with a transparent electrode and a matrix circuit.
- the spatial light modulation element 436 can be realized by a phase modulation type spatial light modulation element that receives coherent parallel light having the same phase and modulates the phase of the incident parallel light.
- the light source 432 is preferably a light source that emits laser light. Since the phase modulation type spatial light modulation element 436 is focus-free, even if light is projected onto a plurality of projection distances, there is no need to change the focus for each distance.
- the spatial light modulation element 436 may be an element of a system different from the phase modulation type, but will be described below as a phase modulation type element.
- the spatial light modulation element 436 is realized by, for example, an element using a ferroelectric liquid crystal, a homogeneous liquid crystal, a vertical alignment liquid crystal, or the like. Specifically, the spatial light modulator 436 can be realized by LCOS (Liquid Crystal Crystal on Silicon). The spatial light modulation element 436 may be realized by, for example, MEMS (Micro Electro Mechanical System).
- phase modulation type spatial light modulation element 436 By using the phase modulation type spatial light modulation element 436, it is possible to concentrate energy on the display information portion by operating so as to sequentially switch the region where the communication light is transmitted. Therefore, according to the phase modulation type spatial light modulation element 436, if the output of the light source 432 is the same, display information can be displayed brighter than that of the method of projecting light over the entire display area.
- the modulation element control unit 437 will be described in detail with reference to FIG. As shown in FIG. 23, the modulation element control unit 437 includes a reception circuit 471, a frame memory 472, a timing generation circuit 473, and a conversion circuit 474.
- the reception circuit 471 acquires a pattern to be displayed on the display unit of the spatial light modulation element 436 from the light transmission control circuit 142.
- the pattern displayed on the display unit is a phase distribution corresponding to the communication light 100.
- the receiving circuit 471 receives the phase distribution as a DVI (Digital Visual Interface) signal.
- the reception circuit 471 stores the acquired phase image in the frame memory 472. Note that the phase distribution displayed on the display unit of the spatial light modulator 436 may be stored in the storage circuit 144 of the optical communication unit 14.
- the frame memory 472 stores the phase distribution to be displayed on the display unit of the spatial light modulator 436.
- the frame memory 472 outputs the phase distribution in accordance with the conversion processing timing of the conversion circuit 474.
- the timing generation circuit 473 generates a phase distribution and generates timing for converting the phase distribution stored in the frame memory 472 from a digital signal to an analog signal.
- the conversion circuit 474 reads the phase distribution from the frame memory 472 based on the timing generated by the timing generation circuit 473.
- the conversion circuit 474 converts the read phase distribution into an analog signal and outputs it to the spatial light modulation element 436.
- the light transmission control circuit 142 adjusts the timing for displaying the phase distribution on the display unit of the spatial light modulation element 436 and the timing for emitting light by driving the light source 432, so that an arbitrary communication target can be set. Control to transmit communication light of shape and size.
- FIG. 24 is a conceptual diagram illustrating an example of controlling the light transmission direction of the communication light 100 transmitted by the communication device 1-3 according to the present embodiment.
- the optical system is not disposed after the spatial light modulator 436, but an optical system such as a Fourier transform lens or a projection lens may be disposed.
- the communication device 1-3A displays the phase distribution according to the control of the modulation element control unit 437 on the display unit of the spatial light modulation element 436, and displays the display.
- the laser beam from the light source 432 is irradiated to the part.
- the phase distribution for forming a spot at the light receiving position of the communication device 1-3B (hereinafter referred to as “repeater B”) that is a communication target may be displayed on the display unit of the spatial light modulator 436.
- the spatial light modulator 436 is used, the communication light 100 having an arbitrary shape can be transmitted by preparing a phase distribution to be displayed on the display unit.
- a light receiver 145 having an imaging function with a plurality of light receiving regions arranged in an array information can be included in the projection shape of the communication light 100. Further, if only the communication light 100 having a specific shape is transmitted and received, the security between the communication devices can be improved.
- the light transmission direction of the communication light 100 is changed by changing the phase distribution displayed on the display unit of the spatial light modulation element 436. That is, in the communication device 1-33 of this embodiment, the light transmission direction of the communication light 100 can be changed without providing a movable part that is mechanically operated.
- the reflected light of the spatial light modulation element 436 of the repeater A is transmitted as communication light 100 to the communication device 1-3C (hereinafter referred to as repeater C).
- the communication light 100 may be transmitted to the repeater B via the relay B. That is, even if the communication light 100 cannot be directly transmitted and received between the repeater A and the repeater B, a line can be formed between the repeater A and the repeater B via the repeater C.
- the transmission direction of the communication light can be changed to an arbitrary direction without a mechanical operation unit. Can be controlled.
- a communication device according to a fourth embodiment of the present invention will be described with reference to the drawings.
- a spatial light modulation element is installed at the subsequent stage of the optical communication unit.
- the communication device of the present embodiment is the same as the first embodiment except for the spatial light modulation element and the modulation element control unit, and therefore detailed description of the same configuration is omitted.
- FIG. 25 is a block diagram showing a configuration of the communication device 1-4 (relay device) according to the present embodiment. As shown in FIG. 25, the communication device 1-4 differs from the communication device 1 (relay device) of the first embodiment in that it includes a spatial light modulation element 16 and a modulation element control unit 17.
- FIG. 26 is a block diagram showing the configuration of the communication device 2-4 (router) according to this embodiment. As shown in FIG. 26, the communication device 2-4 is different from the communication device 2 (router) of the first embodiment in that the communication device 2-4 includes a spatial light modulation element 26 and a modulation element control unit 27.
- the configurations of the spatial light modulation element 16 and the modulation element control unit 17 of the communication device 1-4 are the same as the configurations of the spatial light modulation element 26 and the modulation element control unit 27 of the communication device 2-4. Therefore, in the following, the spatial light modulation element 16 and the modulation element control unit 17 of the communication device 1-4 will be described.
- FIG. 27 shows the light emitted from the light transmitter 143 of the optical communication unit 14 as the communication light 100 after being guided to the spatial light modulation element 16, and the communication light 100 received by the spatial light modulation element 16 is received by the light receiver.
- a communication device (hereinafter referred to as communication device 1-4) that communicates with a specific communication target using the communication light 100 transmits the communication light 100 according to the pattern displayed on the display unit of the spatial light modulator 16. Control the direction of light.
- the communication target transmits the communication light 100 to the communication device 1-4.
- the communication device 1-4 transmits information according to the drive timing of the communication light 100. Therefore, the communication light 100 received by the spatial light modulator 16 continues to be received by the light receiver 145 unless the position of the communication target changes.
- FIGS. 28 and 29 are conceptual diagrams showing application examples of the communication device 1-4 according to the present embodiment.
- FIG. 28 when communication device 1-4A (hereinafter referred to as repeater A) communicates with communication device 1-4B (hereinafter referred to as repeater B) using communication light 100, An example of control when an obstacle enters the communication path is shown.
- FIGS. 28 and 29 all of the repeater B, the repeater C, and the repeater D are connected to the communication device 2-4 (router).
- An obstacle is located between the repeater A and the repeater B as shown in the upper view (scene A) of FIG. In scene A, repeater A and repeater B cannot communicate directly using communication light 100.
- the repeater A changes the pattern of the display unit of the spatial light modulator 16 and transmits the communication light 100 that requests a response toward a wide range as shown in the lower side of FIG. 28 (scene B). Yes (wide scan).
- the communication light 100 does not reach the communication device 1-4C (hereinafter referred to as repeater C) due to an obstacle, but the communication light 100 reaches the communication device 1-4D (hereinafter referred to as repeater D). Yes.
- FIG. 29 is an example in which the repeater D transmits the communication light 100 indicating a response in response to the wide scan of the repeater A.
- 29 is an example in which the communication light 100 is transmitted from the repeater A to the repeater D according to the response from the repeater D. After the scene D, the repeater A and the repeater D can communicate with each other using the communication light 100.
- the spatial light modulation element is used for transmitting communication light but also the spatial light modulation element is used for receiving communication light. If a spatial light modulation element is used, the transmission / reception direction of communication light can be controlled only by changing the pattern displayed on the display unit.
- a spatial light modulator If a spatial light modulator is used, desired communication light can be selectively received by controlling the display pattern of the display unit of the spatial light modulator. Therefore, according to the communication apparatus according to the present embodiment, it is possible to select communication light to be received.
- FIG. 30 is a block diagram showing a configuration of the communication terminal 250 according to the present embodiment.
- the communication terminal 250 according to the present embodiment includes an antenna 251, a wireless communication unit 252, a communication control unit 253, a terminal control unit 254, a storage circuit 255, and an optical communication unit 257.
- 30 is merely an example, and does not limit the scope of the present invention.
- the antenna 251, the wireless communication unit 252, the communication control unit 253, the terminal control unit 254, and the storage circuit 255 have the same configuration as that of the communication terminal 200 in FIG.
- the optical communication unit 257 has the same configuration and function as any of the optical communication units of the first to fourth embodiments.
- FIG. 31 is a conceptual diagram showing an application example of the communication terminal 250.
- the communication terminal 200 communicates with the communication device 1 using a radio signal.
- the communication terminal 250 communicates with the communication device 1 using the communication light 100. If there is an obstacle between the communication terminal 250 and the communication device 1, a communication environment cannot be established between these devices. However, by controlling the direction of the communication light 100 as in the second to fourth embodiments, if the communication terminal 250 relays any one of the communication devices 1 and connects to the communication device 2, Can be established. Note that a user who uses the communication terminal 250 may change the transmission direction of the communication light 100.
- the communication terminal according to the present embodiment communicates with the communication device using communication light. Therefore, according to the communication terminal according to the present embodiment, it is possible to construct a connection environment with the backbone network without using the wireless signal communication band.
- the communication terminal since information transmission between the communication terminal and the communication device is also performed using communication light, it is possible to reduce the possibility of intercepting communication contents rather than using a radio signal. That is, according to the communication apparatus according to the present embodiment, communication security in the wireless LAN network can be further improved.
- the communication device having the router function and the communication device having the relay function are different devices.
- the configuration is limited to this configuration as long as the function as each of the above-described embodiments can be realized. Not. For example, you may comprise so that a radio signal can be transmitted / received between each communication apparatus.
- Wireless communication means for transmitting and receiving wireless signals
- Optical communication means for transmitting and receiving spatial light as communication light
- a communication apparatus that performs signal conversion in a conversion process between the wireless signal and the communication light and includes a control unit that sets a transmission destination of the wireless signal and the communication light.
- the optical communication means includes A light transmitter that transmits the communication light based on the wireless signal; The communication device according to appendix 1, further comprising a light receiver that receives the communication light transmitted from another device.
- the communication device according to appendix 2 wherein the light transmitter includes a light source that emits laser light.
- the light transmitter is A phase modulation type spatial light modulation element having display means for reflecting light emitted from the light source; Modulation element control means for controlling the pattern displayed on the display means of the spatial light modulation element, The communication apparatus according to appendix 3, wherein light emitted from the light source is reflected by display means of the spatial light modulator and transmitted as the communication light.
- a phase modulation type spatial light modulation element having display means for reflecting light emitted from the light source; Modulation element control means for controlling the pattern displayed on the display means of the spatial light modulation element,
- the spatial light modulator is The light emitted from the light transmitter is reflected by the display means and transmitted as the communication light, and the communication light transmitted from another device is reflected by the display means and received by the light receiver.
- the communication device according to 3. (Appendix 6)
- the modulation element control means includes The communication device according to appendix 4 or 5, wherein a transmission direction of the communication light is controlled by changing a pattern displayed on a display unit of the spatial light modulation element.
- the optical communication means includes When communication with the communication target is interrupted, the communication light is expanded by changing the pattern of the display means of the spatial light modulation element, and the other response responding to the communication light with the expanded irradiation range
- the communication apparatus according to appendix 6, wherein the communication light is transmitted toward the apparatus.
- the optical communication means includes Movable means for changing the orientation of the light transmitter and the light receiver;
- the communication apparatus according to any one of appendices 2 to 7, further comprising: a direction control unit that controls the movable unit in order to control a direction of the light transmitter and the light receiver.
- a backbone connection means having a router function for connecting to the backbone network is provided,
- the control means includes The communication apparatus according to any one of appendices 1 to 8, which establishes a connection between a communication terminal that transmits and receives the wireless signal to and from the wireless communication unit and the backbone network.
- Appendix 11 A communication terminal having an optical communication function of transmitting and receiving the communication light to and from the communication device according to any one of appendices 1 to 9.
- a wireless communication system comprising a plurality of communication devices according to any one of appendices 1 to 9, wherein the plurality of communication devices are arranged so as to transmit and receive the communication light.
- Radio communication means for transmitting / receiving a radio signal, optical communication means for transmitting / receiving spatial light as communication light, signal conversion in a conversion process between the radio signal and the communication light, and transmission of the radio signal and the communication light A communication method comprising: arranging a plurality of communication devices including a control unit for setting a destination, and controlling different communication devices to communicate with each other using the communication light.
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Abstract
Description
(構成)
まず、本発明の第1の実施形態に係る通信システムについて図面を参照しながら説明する。図1は、本実施形態に係る無線LAN(Local Area Network)ネットワークの構成を示す概念図である。
次に、図2を用いて、中継器として機能する通信装置1の構成について説明する。図2のように、通信装置1は、アンテナ11、無線通信部12、中継制御部13および光通信部14を有する。図2には、通信装置1と通信装置2とが通信光100を用いて通信し合う例を図示しているが、異なる通信装置1同士が通信し合ったり、異なる通信装置2同士が通信し合ったりしてもよい。
図3は、光通信部14の構成を示すブロック図である。図3のように、光通信部14は、入出力部141、送光制御回路142、送光器143、記憶回路144、受光器145および受光制御回路146を有する。
図5は、無線通信部12の構成例を示すブロック図である。なお、図5の構成は、本実施形態に係る通信装置1を実現するための一例であって、本発明の範囲を限定するものではない。
次に、図6を用いて、中継制御部13の構成について説明する。図6のように、中継制御部13は、信号変換部131、送光条件生成部132、入出力部133、中継制御回路134および記憶部135を有する。
次に、図7を用いて、ルータとして機能する通信装置2の構成について説明する。図7のように、通信装置2は、ルータ制御部23、光通信部24および基幹接続部25を有する。
次に、図8を用いて、ルータ制御部23の構成について説明する。図8のように、ルータ制御部23は、信号変換部231、送光条件生成部232、入出力部233、ルータ制御回路234および記憶部235を有する。ルータ制御部23の構成は、ルータ制御回路234以外は中継制御部13と同様の構成を有する。
ここで、図10を用いて、本実施形態に係る通信装置1および通信装置2の制御系統を実現するハードウェア(制御系統50)について説明する。なお、制御系統50は、通信装置1および通信装置2を実現するための一例であって、本発明の範囲を限定するものではない。
ここで、本実施形態に係る通信装置1および通信装置2によって構築される無線LANネットワークの適用例を示す。
次に、本発明の第2の実施形態に係る通信装置について図面を参照しながら説明する。本実施形態は、通信光の送光方向と受光方向とを変更する機能を有する点が第1の実施形態とは異なる。なお、本実施形態の通信装置は、光通信部以外の構成は第1の実施形態と同様であるため、同様の構成についての詳細な説明は省略する。
ここで、図20~図21を用いて、中継機能を有する通信装置1-2と、ルータ機能を有する通信装置2-2とによって構成される無線LANネットワークにおける通信光100の送受光の適用例について説明する。図20および図21は、図14~図17と同じ視点から見た概念図である。なお、通信装置2-2は、本実施形態の光通信部14-2を含むものとする。
次に、本発明の第3の実施形態に係る通信装置について図面を参照しながら説明する。本実施形態に係る通信装置は、送光器に空間光変調素子を含む。なお、本実施形態の通信装置は、送光器以外の構成は第1の実施形態と同様であるため、同様の構成についての詳細な説明は省略する。
次に、本発明の第4の実施形態に係る通信装置について図面を参照しながら説明する。本実施形態に係る通信装置は、光通信部の後段に空間光変調素子を設置する。なお、本実施形態の通信装置は、空間光変調素子および変調素子制御部以外の構成は第1の実施形態と同様であるため、同様の構成についての詳細な説明は省略する。
次に、本発明の第5の実施形態について図面を参照しながら説明する。本実施形態は、通信装置と通信し合う端末装置に光通信部を含め、通信装置と通信端末との間でも通信光を用いて通信し合う点が第1~第4の実施形態とは異なる。本実施形態に係る通信端末は、第1~第4の実施形態のいずれにも適用できるが、以下においては第1の実施形態に係る通信装置1と通信し合う例について説明する。
〔付記〕
上記の実施形態の一部又は全部は、以下の付記のようにも記載されうるが、以下には限られない。
(付記1)
無線信号を送受信する無線通信手段と、
空間光を通信光として送受信する光通信手段と、
前記無線信号と前記通信光との変換過程における信号変換を行うとともに、前記無線信号および前記通信光の送信先を設定する制御手段とを備える通信装置。
(付記2)
前記光通信手段は、
前記無線信号に基づいて前記通信光を送光する送光器と、
他の装置から送光された前記通信光を受光する受光器とを有する付記1に記載の通信装置。
(付記3)
前記送光器は、レーザ光を出射する光源を含む付記2に記載の通信装置。
(付記4)
前記送光器は、
前記光源の出射光を反射する表示手段を有する位相変調型の空間光変調素子と、
前記空間光変調素子の表示手段に表示されるパターンを制御する変調素子制御手段とを含み、
前記光源からの出射光を前記空間光変調素子の表示手段で反射させて前記通信光として送光する付記3に記載の通信装置。
(付記5)
前記光源の出射光を反射する表示手段を有する位相変調型の空間光変調素子と、
前記空間光変調素子の表示手段に表示されるパターンを制御する変調素子制御手段とを備え、
前記空間光変調素子は、
前記送光器からの出射光を表示手段で反射することによって前記通信光として送光するとともに、他の装置から送光された前記通信光を表示手段に反射させて前記受光器に受光させる付記3に記載の通信装置。
(付記6)
前記変調素子制御手段は、
前記空間光変調素子の表示手段に表示されるパターンを変更することによって前記通信光の送光方向を制御する付記4または5に記載の通信装置。
(付記7)
前記光通信手段は、
通信対象との通信が途絶えた際に、前記空間光変調素子の表示手段のパターンを変更することによって前記通信光を照射範囲を広げ、照射範囲を広げた前記通信光に対して応答した他の装置に向けて前記通信光を送光する付記6に記載の通信装置。
(付記8)
前記光通信手段は、
前記送光器および前記受光器の向きを変更するための可動手段と、
前記送光器および前記受光器の向き制御するために前記可動手段を制御する方向制御手段とを有する付記2乃至7のいずれか一項に記載の通信装置。
(付記9)
基幹ネットワークに接続するためのルータ機能を有する基幹接続手段を備え、
前記制御手段は、
前記無線通信手段との間で前記無線信号を送受信する通信端末と、前記基幹ネットワークとの接続を確立する付記1乃至8のいずれか一項に記載の通信装置。
(付記10)
付記1乃至9のいずれか一項に記載の通信装置との間で前記無線信号を送受信する無線通信機能を有する通信端末。
(付記11)
付記1乃至9のいずれか一項に記載の通信装置との間で前記通信光を送受信する光通信機能を有する通信端末。
(付記12)
付記1乃至9のいずれか一項に記載の通信装置を複数備え、前記通信光を送受信し合うように複数の前記通信装置を配置する無線通信システム。
(付記13)
無線信号を送受信する無線通信手段と、空間光を通信光として送受信する光通信手段と、前記無線信号と前記通信光との変換過程における信号変換を行うとともに、前記無線信号および前記通信光の送信先を設定する制御手段とを備える通信装置を複数配置し、異なる前記通信装置同士が前記通信光によって通信し合うように制御する通信方法。
11 アンテナ
12 無線通信部
13 中継制御部
14 光通信部
16 空間光変調素子
17 変調素子制御部
22 無線通信部
23 ルータ制御部
24 光通信部
25 基幹接続部
26 空間光変調素子
27 変調素子制御部
131 信号変換部
132 送光条件生成部
133 入出力部
134 中継制御回路
135 記憶部
141 入出力部
142 送光制御回路
143 送光器
144 記憶回路
145 受光器
146 受光制御回路
147 方向変更機構
148 方向制御部
200 通信端末
231 信号変換部
232 送光条件生成部
233 入出力部
234 ルータ制御回路
235 記憶部
251 アンテナ
252 無線通信部
253 通信制御部
254 端末制御部
255 記憶回路
257 光通信部
300 基幹ネットワーク
310 有線ケーブル
431 光源駆動部
432 光源
436 空間光変調素子
437 変調素子制御部
Claims (13)
- 無線信号を送受信する無線通信手段と、
空間光を通信光として送受信する光通信手段と、
前記無線信号と前記通信光との変換過程における信号変換を行うとともに、前記無線信号および前記通信光の送信先を設定する制御手段とを備える通信装置。 - 前記光通信手段は、
前記無線信号に基づいて前記通信光を送光する送光器と、
他の装置から送光された前記通信光を受光する受光器とを有する請求項1に記載の通信装置。 - 前記送光器は、レーザ光を出射する光源を含む請求項2に記載の通信装置。
- 前記送光器は、
前記光源の出射光を反射する表示手段を有する位相変調型の空間光変調素子と、
前記空間光変調素子の表示手段に表示されるパターンを制御する変調素子制御手段とを含み、
前記光源からの出射光を前記空間光変調素子の表示手段で反射させて前記通信光として送光する請求項3に記載の通信装置。 - 前記光源の出射光を反射する表示手段を有する位相変調型の空間光変調素子と、
前記空間光変調素子の表示手段に表示されるパターンを制御する変調素子制御手段とを備え、
前記空間光変調素子は、
前記送光器からの出射光を表示手段で反射することによって前記通信光として送光するとともに、他の装置から送光された前記通信光を表示手段に反射させて前記受光器に受光させる請求項3に記載の通信装置。 - 前記変調素子制御手段は、
前記空間光変調素子の表示手段に表示されるパターンを変更することによって前記通信光の送光方向を制御する請求項4または5に記載の通信装置。 - 前記光通信手段は、
通信対象との通信が途絶えた際に、前記空間光変調素子の表示手段のパターンを変更することによって前記通信光を照射範囲を広げ、照射範囲を広げた前記通信光に対して応答した他の装置に向けて前記通信光を送光する請求項6に記載の通信装置。 - 前記光通信手段は、
前記送光器および前記受光器の向きを変更するための可動手段と、
前記送光器および前記受光器の向き制御するために前記可動手段を制御する方向制御手段とを有する請求項2乃至7のいずれか一項に記載の通信装置。 - 基幹ネットワークに接続するためのルータ機能を有する基幹接続手段を備え、
前記制御手段は、
前記無線通信手段との間で前記無線信号を送受信する通信端末と、前記基幹ネットワークとの接続を確立する請求項1乃至8のいずれか一項に記載の通信装置。 - 請求項1乃至9のいずれか一項に記載の通信装置との間で前記無線信号を送受信する無線通信機能を有する通信端末。
- 請求項1乃至9のいずれか一項に記載の通信装置との間で前記通信光を送受信する光通信機能を有する通信端末。
- 請求項1乃至9のいずれか一項に記載の通信装置を複数備え、前記通信光を送受信し合うように複数の前記通信装置を配置する無線通信システム。
- 無線信号を送受信する無線通信手段と、空間光を通信光として送受信する光通信手段と、前記無線信号と前記通信光との変換過程における信号変換を行うとともに、前記無線信号および前記通信光の送信先を設定する制御手段とを備える通信装置を複数配置し、異なる前記通信装置同士が前記通信光によって通信し合うように制御する通信方法。
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