WO2006004184A1 - 無線通信システム - Google Patents
無線通信システム Download PDFInfo
- Publication number
- WO2006004184A1 WO2006004184A1 PCT/JP2005/012581 JP2005012581W WO2006004184A1 WO 2006004184 A1 WO2006004184 A1 WO 2006004184A1 JP 2005012581 W JP2005012581 W JP 2005012581W WO 2006004184 A1 WO2006004184 A1 WO 2006004184A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- transmission
- path
- transmission line
- low
- loss
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 520
- 238000009434 installation Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 238000009877 rendering Methods 0.000 abstract 4
- 238000010586 diagram Methods 0.000 description 8
- 239000012212 insulator Substances 0.000 description 8
- 239000004020 conductor Substances 0.000 description 7
- 239000013307 optical fiber Substances 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000001151 other effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/28—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium using the near field of leaky cables, e.g. of leaky coaxial cables
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2603—Arrangements for wireless physical layer control
- H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels
Definitions
- the present invention relates to a wireless communication system that performs wireless communication between a base station and a wireless communication terminal using a leaky transmission line and a low-loss transmission line.
- a coaxial cable which is a low-loss transmission line, is connected to a relay device, a leaky coaxial cable is connected to the coaxial cable via a connector, and another coaxial cable is connected to the leaky coaxial cable via a connector. Is connected, another leaky coaxial cable is connected to the coaxial cable via a connector, another coaxial cable is connected to the leaky coaxial cable via a connector, and a terminator is connected to the end of this coaxial cable.
- a system is known (for example, Japanese Patent Laid-Open No. 05-83258, Patent Document 1). According to this system, it is possible to reduce the equipment cost and the attenuation of the signal level to be transmitted.
- an electric signal and an optical signal are alternately converted into a radio that generates an electric signal for wireless transmission.
- An optical fiber that transmits an optical signal to this converter is connected to an OZE converter.
- OZE variation ⁇ and multiple optical fibers are alternately connected to this optical fiber, and a leakage cable is connected to the first ⁇ , OZE variation ⁇ via a metal cable.
- a system in which a leakage curve is connected to the OZE via a phase adjuster is known (for example, Japanese Patent Laid-Open No. 2002-314468, Patent Document 2). According to this system, it is possible to extend the distance of wireless transmission by extending the length of the leaked cable without causing an increase in transmission loss.
- the object of the present invention is to always reduce the transmission loss as much as possible regardless of the position of the wireless communication terminal, and it is not necessary to make troublesome adjustments.
- the wireless communication system of the present invention includes:
- a plurality of transmission lines configured by juxtaposition of leaky transmission lines and low-loss transmission lines; at least one wireless transmission terminal located at an arbitrary position along each transmission line; and connected between the transmission lines.
- a path for conducting a lossy transmission line, a path for conducting a low loss transmission line in one transmission line and a leakage transmission line in the other transmission line, and a low loss transmission line in one transmission line At least one switch that selectively forms a path that conducts the low-loss transmission path in the transmission path on the other side;
- a base station connected to a transmission line located at an end of each transmission line
- the leaky transmission line at a position corresponding to the wireless transmission terminal is conducted and the remaining leaky transmission lines are not conducted, and the transmissions A control section that controls each of the switches so that the low-loss transmission path at a position corresponding to the wireless transmission terminal among the low-loss transmission paths of the path does not conduct but the remaining low-loss transmission paths conduct.
- FIG. 1 is a diagram showing an overall configuration of a first embodiment of the present invention.
- FIG. 2 is a block diagram showing a configuration of a switch according to the first embodiment.
- FIG. 3 is a cross-sectional view showing a configuration of a transmission line according to the first embodiment.
- FIG. 4 is a diagram for explaining an example of a communication path in the transmission path of the first embodiment.
- FIG. 5 is a diagram for explaining an operation when the transmission line is interrupted according to the first embodiment.
- FIG. 6 is a diagram showing an overall configuration of a second embodiment of the present invention.
- FIG. 7 is a block diagram showing a configuration of a switch according to the second exemplary embodiment.
- FIG. 8 is a diagram showing an overall configuration of a third embodiment of the present invention.
- FIG. 9 is a diagram showing an overall configuration of a fourth embodiment of the present invention.
- one end of the first transmission path (one end of the leaky transmission path 2-1 and one end of the leaky transmission path 2-1) is configured in parallel with the leaky transmission path 2-1 and the low-loss transmission path 3-1.
- One end of low-loss transmission line 3-1) is connected.
- the other end of this first transmission line (the other end of the leaky transmission line 2-1 and the other end of the low loss transmission line 3-1) is connected to the leaky transmission line 2-2 and the low loss via the switch 4-1.
- One end of the second transmission line (one end of the leaky transmission line 2-2 and one end of the low-loss transmission line 3-2) configured by arranging the transmission lines 3-2 in parallel is connected.
- this second transmission line (the other end of the leaky transmission line 2-2 and the other end of the low loss transmission line 3-2) is connected to the leaky transmission line 2-3 and the low line via the switch 4-2.
- One end of the third transmission line (one end of the leaky transmission line 2-3 and one end of the low-loss transmission line 3-3) configured by juxtaposing the lossy transmission line 3-3 is connected.
- Terminators 41 and 42 are connected to the other end of this third transmission line (the other end of leakage transmission line 2-3 and the other end of low-loss transmission line 3-3).
- Switch 4-1 includes connector 11 to which the other end of leakage transmission path 2-1 is connected, connector 12 to which the other end of low-loss transmission path 3-1 is connected, and leakage transmission path 2-2. It has a connector 13 to which one end is connected and a connector 14 to which one end of the low-loss transmission line 3-2 is connected, and includes a leakage transmission line 2-1 on one side and a leakage transmission line 2-2 on the other side.
- the switch 4-2 includes a connector 31 to which the other end of the leakage transmission path 2-2 is connected, a connector 32 to which the other end of the low loss transmission path 3-2 is connected, and a leakage transmission path 2-3. It has a connector 33 to which one end is connected and a connector 34 to which one end of the low-loss transmission line 3-3 is connected, and includes a leaky transmission line 2-2 on one side and a leaky transmission line 2-3 on the other side.
- a path for conducting the path 2-3 and a path for conducting the low-loss transmission path 3-2 on one side and the low-loss transmission path 3-3 on the other side are selectively formed.
- the leaky transmission lines 2-1, 2-2, and 2-3 have a large number of radiation slots, and when a signal flows, radiate radio waves to the outside through these radiation slots.
- a plurality of wireless communication terminals 5 are arranged in the vicinity of the first transmission path. These wireless communication terminals 5 perform wireless communication with the base station 1 via the leaky transmission line 2-1 of the first transmission line.
- a plurality of wireless communication terminals 6 are arranged in the vicinity of the second transmission path. These wireless communication terminals 6 perform wireless communication with the base station 1 via the leaky transmission line 2-2 of the second transmission line.
- a plurality of wireless communication terminals 7 are arranged in the vicinity of the third transmission path. These wireless communication terminals 7 perform wireless communication with the base station 1 via the leaky transmission line 2-3 of the third transmission line.
- the control signal for controlling the switches 4-1, 4-2 is superimposed on the transmission signal.
- the switching devices 4-1, 4-2 separate the control signal from the received transmission signal, and perform the switching operation according to the separated control signal, so that Routes are selectively formed.
- the switch 4-1 includes a switch 21, a control unit 22 for controlling the switch 21, a signal separator 23, a signal synthesizer 24, and four circulators 25, 26. , 2 7, 28 c
- the transmission signal supplied from the base station 1 to the low-loss transmission path 3-1 is the connector 12 of the switch 4-1 Is input.
- the input transmission signal is supplied to the signal separator 23 via the circulator 25.
- the signal separator 23 separates a control signal for controlling the switching switch 21 from the received transmission signal.
- the separated transmission signal is sent from the signal separator 23 to the switching switch 21 via the circuit 26.
- the separated control signal is also sent to the control unit 22 as the signal separator 23 force.
- a transmission signal supplied from the base station 1 to the leaky transmission path 2-1 is input to the connector 11 of the switch 4-1.
- the input transmission signal is sent to the switch 21.
- the control unit 22 controls the switching switch 21 in accordance with the control signal received from the signal separator 23, so that the transmission signal of the low loss transmission line 3-1 is transmitted to the leakage transmission line 2-2 or the low loss. Outputs to transmission path 3-2.
- the control unit 22 controls the switching switch 21 according to the control signal received from the signal separator 23, so that the transmission signal of the leaky transmission line 2-1 is transmitted to the leaky transmission line 2-2 or low loss transmission. Output to Road 3-2.
- the control unit 22 supplies the control signal received from the signal separator 23 to the signal synthesizer 24.
- the transmission signal of the low loss transmission path 3-1 When the transmission signal of the low loss transmission path 3-1 is output to the low loss transmission path 3-2, the transmission signal is sent to the signal synthesizer 24 via the switching switch 21 and the circulator 27.
- the signal synthesizer 24 superimposes the control signal received from the control unit 22 on the transmission signal received from the circulator 27.
- the superimposed transmission signal is supplied to the low-loss transmission line 3-2 via the circulator 28 and the connector 14.
- the transmission signal (transmission signal from the wireless communication terminal to the base station 1) input to the connector 14 of the switch 4-1 from the low-loss transmission path 3-2 is transmitted through the circulators 28 and 27. Input to switch 21.
- the transmission signal (transmission signal from the wireless communication terminal to the base station 1) input from the leaky transmission path 2-2 to the connector 13 of the switch 4-1 is input to the switch 21 as it is.
- the control unit 22 supplies the transmission signal input to the switching switch 21 to the circulator 26 side by the control of the switching switch 21 so that the transmission signal input to the switching switch 21 is transmitted to the base station 1 with low loss. .
- the transmission signal supplied to the circulator 26 side is transmitted through the circulator 26, the circulator 25, and the connector 12 with low loss. Sent to route 3-1.
- the switching device 4-2 has the same configuration as the switching device 4-1.
- the transmission signal output from switch 4-1 to low-loss transmission line 3-2 is input to switch 4-2.
- This input transmission signal is output from switch 4-2 to leaky transmission line 2-3 or low-loss transmission line 3-3.
- Switch 4-1 Power Leakage transmission path 2-2 The transmission signal output to the switch 4-2 is also input.
- This input transmission signal is output to switch 4-2 power leakage transmission path 2-3 or low loss transmission path 3-3.
- the transmission signal input from the low loss transmission path 3-3 to the switch 4-2 is output to the low loss transmission path 3_2.
- the transmission signal input from the leaky transmission line 2-3 to the switch 4-2 is also output to the low loss transmission line 3-2.
- each transmission line is composed of a leaky transmission line body 51 in which the leaky transmission line is included and a support cable 52 in which the low-loss transmission line is included.
- the support cable 52 supports the leaky transmission line main body 51.
- the leaky transmission line main body 51 has an external insulator 53.
- This outer insulator 53 is covered with an outer conductor 55 having a radiation slot 54.
- the inner side of the outer insulator 53 is hollow, and an inner conductor 56 is provided at the axial center.
- the inner conductor 56 is held by an inner insulator 57 attached to the inner peripheral surface of the outer insulator 53.
- the outside of the external conductor 55 is covered with a covering member 58.
- the covering member 58 is fixed to the support cable 52.
- the support cable 52 includes a transmission line 59 that forms a low-loss transmission line, a plurality of support lines 60 that surround the transmission line 59, and a covering member 61 that covers these support lines 60.
- the external insulator 53 and the internal insulator 57 are formed of an insulating material such as polyethylene.
- the outer conductor 55 is formed in a pipe shape by winding an aluminum or copper tape around the outer periphery of the outer insulator 53.
- the inner conductor 56 is an aluminum or copper pipe.
- the support wire 60 is a zinc plating conductor.
- the covering member 61 is an insulating material such as polyethylene.
- the base station 1 has the following sections (1) to (3) as main functions.
- the base station 1 When the base station 1 communicates with the wireless communication terminal 7 arranged in the vicinity of the third transmission line, the base station 1 sends a transmission signal superimposed with a control signal to the low-loss transmission line 3-1. To do.
- This transmission signal is input to connector 12 of switch 4-1.
- the switch 4-1 supplies the transmission signal input to the connector 12 to the signal separator 23 via the circulator 25.
- the signal separator 23 separates the received transmission signal into a transmission signal and a control signal.
- the separated transmission signal is supplied to the switching switch 21 via the circulator 26.
- the separated control signal is supplied to the control unit 22 and also supplied from the control unit 22 to the signal synthesizer 24.
- the control unit 22 controls the switching switch 21 so that the transmission signal supplied from the circulator 26 to the switching switch 21 is supplied to the signal synthesizer 24 via the circulator 27.
- the signal synthesizer 24 superimposes the control signal received from the control unit 22 on the transmission signal received from the circulator 27 and sends the superposed transmission signal to the circulator 28.
- the transmission signal sent to the circulator 28 is output to the low-loss transmission line 3-2 via the connector 14. Low loss
- the transmission signal output to the lost transmission path 3-2 is input to the connector 32 of the switch 4-2.
- the switch 4-2 supplies the signal input to the connector 32 to the signal separator via the circuit regulator, similarly to the switch 4-1.
- the signal separator separates the supplied signal into a transmission signal and a control signal, sends the separated transmission signal to the switching switch via the circulator, and sends the separated control signal to the control unit.
- the control unit controls the switch so that the transmission signal is supplied to the leakage transmission path 2-3 through the connector 33.
- each wireless communication terminal 7 can receive a transmission signal from the base station 1.
- Each wireless communication terminal 7 radiates a radio wave toward the leaky transmission path 2-3 when transmission to the base station 1 is necessary.
- the leaky transmission line 2-3 receives the radio wave radiated from the wireless communication terminal 7.
- This received signal is input to the connector 33 of the switch 4-2.
- the switch 4-2 sends the input signal to the connector 33 to the low loss transmission line 3-2 via the connector 32.
- the signal sent to the low-loss transmission line 3-2 is input to the connector 14 of the switch 4-1.
- the switch 4-1 sends the input signal to the connector 14 to the low loss transmission line 3-1 through the connector 12.
- the signal sent to low-loss transmission line 3-1 is sent to base station 1. In this way, the transmission signal from each wireless communication terminal 7 reaches the base station 1.
- the transmission signal from the base station 1 is transmitted through the low-loss transmission line 3-1 of the first transmission line, the switch 4-1, It is sent to each wireless communication terminal 7 through the low-loss transmission line 3-2 of 2 transmission lines, the switch 4-2, and the leaky transmission line 2-3 of the third transmission line.
- the transmission signal from the base station 1 reaches each wireless communication terminal 7 with almost no attenuation.
- the transmission signal from each wireless communication terminal 7 is transmitted to the leaky transmission line 2-3 of the third transmission line 2-3, the switch 4-2, and the low of the second transmission line.
- the transmission signal from the base station 1 is It is sent to each wireless communication terminal 5 via the leaky transmission line 2-1 of the first transmission line.
- a transmission signal from each wireless communication terminal 5 is sent to the base station 1 via the leaky transmission path 2-1 of the first transmission path.
- the radio wave radiated from the leaky transmission path 2-1 of the first transmission path is necessary for communication between the base station 1 and each wireless communication terminal 5. If radio waves are radiated from leaky transmission paths 2-2 and 2-3, the radiated radio waves interfere with the radio waves radiated from leaky transmission path 2-1, and base station 1 and each wireless communication terminal 5 May adversely affect the communication between them. In order to prevent such problems, the transmission signal should not flow into the leaky transmission line 2-2 of the second transmission line and the leaky transmission line 2-3 of the third transmission line (low loss transmission lines 3-2, 3- The switches 4-1, 4-2 are controlled so as to flow to 3). This eliminates radio wave interference and eliminates the need for troublesome processing such as adjusting the phase of the transmitted signal.
- the transmission signal from the base station 1 is a low-loss transmission line 3-1, a switch 4-1, and a second transmission of the first transmission line. It is sent to each wireless communication terminal 6 through the leaked transmission path 2-2.
- the transmission signal from the base station 1 reaches each wireless communication terminal 6 with almost no attenuation.
- the transmission signal from each wireless communication terminal 6 is transmitted to the leaky transmission line 2-2, the switch 4-1 and the first transmission line of the second transmission line. It is sent to base station 1 through low-loss transmission line 3-1. Also in this case, since the low-loss transmission path 3-1 is used, the transmission signal from each wireless communication terminal 6 reaches the base station 1 that is hardly attenuated.
- the transmission signal should not flow into the leaky transmission line 2-1 of the first transmission line and the leaky transmission line 2-3 of the third transmission line (low-loss transmission lines 3-1, 3-
- the switches 4-1, 4-2 are controlled so as to flow to 3). This eliminates radio wave interference and eliminates the need for troublesome processing such as adjusting the phase of the transmitted signal.
- As the terminator only two terminators 41 and 42 connected to the other ends of the leakage transmission line 2-3 and the low-loss transmission line 3-3 of the third transmission line are prepared. Good.
- each transmission path is configured by a parallel arrangement of a low loss transmission path and a leakage transmission path! Therefore, even if a situation occurs where the low loss transmission path is interrupted, the leakage transmission path If is normal, the communication path can be maintained.
- the communication path between the base station 1 and each wireless communication terminal 7 is maintained regardless of the interruption of the low-loss transmission path 3-2.
- radio waves are unnecessarily radiated from the leaky transmission path 2-2, but it is more important to secure a communication path.
- each transmission line is configured by the leaky transmission line main body 51 and the support cable 52, There is no limit.
- a control signal for controlling each switch is sent from the base station 1 directly to each switch using a dedicated signal line without being superimposed on the transmission signal.
- a dedicated signal line for sending a control signal between base station 1 and switch 9-1 and between base station 1 and switch 9-2. 8 is connected.
- the switch 9-1 has a control unit 29 and receives a control signal from the signal line 8.
- the control unit 29 controls the switching switch 21 according to the received control signal. This control is the same as the control of the switch 4-1 of the first embodiment.
- the switch 9-2 has the same configuration as the switch 9-1.
- the control of the switching switch of the switch 9-2 is the same as the control of the switch 4-2 of the first embodiment.
- Other configurations are the same as those of the first embodiment. Therefore, the description is omitted.
- a line 43 is provided along each transmission line between the base station 1 and the terminators 41 and 42.
- the moving body 45 on which the wireless communication terminal 44 is mounted moves at a constant speed with the positional force corresponding to the base station 1 directed toward the terminators 41 and 42 on the line 43.
- Base station 1 stores in advance information such as the distance of each transmission path, the installation positions of switching devices 4-1, 4-2, the installation positions of terminators 41, 42, and the moving speed of moving body 45. ing.
- the base station 1 has the following sections (1) to (4) as main functions.
- the moving body 45 Based on the stored information and the passage of time from the start of movement of the moving body 45, the moving body 45 corresponds to the T1 section and the second transmission path corresponding to the first transmission path. Judgment section to determine where in the T3 section corresponding to the T2 section and the third transmission line.
- the switch 4-1 When it is determined that the moving body 45 exists in the T1 section, the switch 4-1 is set so that the leakage transmission path 2-1 and the low loss transmission path 3-2 are electrically connected. And a control section that controls switch 4-2 so that low-loss transmission line 3-2 and low-loss transmission line 3-3 are conductive.
- the switch 4-1 is set so that the low loss transmission path 3-1 and the leakage transmission path 2-2 are conducted.
- Control section that controls switch 4-2 so that leakage transmission path 2-2 and low-loss transmission path 3-3 are conducted.
- the switch 4-1 When it is determined that the moving body 45 exists in the T3 section, the switch 4-1 is set so that the low loss transmission path 3-1 and the low loss transmission path 3-2 are electrically connected. Control section that controls switch 4-2 so that low-loss transmission path 3-2 and leakage transmission path 2-3 are conducted.
- the base station 1 when the moving body 45 is traveling in the T1 section corresponding to the first transmission path, the base station 1 is connected via the leaky transmission path 2-1 of the first transmission path. Communication with the wireless communication terminal 44 of the moving body 45 can be performed. No transmission signal flows on leaky transmission lines 2-2 and 3-3 Therefore, unnecessary radio waves are not radiated from the leaky transmission lines 2-2 and 3-3. Therefore, radio wave interference does not occur.
- the wireless communication terminal 44 of the base station 1 and the mobile unit 45 via the leakage transmission path 2-2 of the second transmission path Can communicate with each other. Since the transmission signal does not flow in the leaky transmission lines 2-1, 3-3, unnecessary radio waves are not radiated from the leaky transmission lines 2-1, 3-3. Therefore, radio wave interference does not occur. Also, since transmission loss 3-1 is used, transmission loss can be reduced.
- the wireless communication terminal 44 of the base station 1 and the mobile unit 45 via the leakage transmission path 2-3 of the third transmission path Can communicate with each other. Since no transmission signal flows through the leaky transmission lines 2-1, 3-2, unnecessary radio waves are not radiated from the leaky transmission lines 2-1, 3-2. Therefore, radio wave interference does not occur. In addition, transmission loss can be reduced because low-loss transmission lines 3-1 and 3-2 are used.
- a mobile unit 47 equipped with a wireless communication terminal 46 is connected to a base station 1 and a terminator 4
- a sensor 48-1 is provided at the installation position of the switching device 4-1.
- Sensor 48-2 is installed at the installation position of switch 4-2.
- These sensors 48-1 and 48-2 detect the passage of the moving body 47 by infrared rays or the like. The detection signal force of these sensors 48-1 and 48-2 is sent to the base station 1 through the signal line 49.
- the base station 1 has the following sections (1) to (6) as main functions.
- Control section that controls switch 4-2 so that 2-3 is connected.
- the wireless communication system of the present invention can be used for a system in which the position of the wireless communication terminal cannot be specified.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Near-Field Transmission Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004200455A JP3732849B1 (ja) | 2004-07-07 | 2004-07-07 | 無線通信システム |
JP2004-200455 | 2004-07-07 |
Publications (1)
Publication Number | Publication Date |
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WO2006004184A1 true WO2006004184A1 (ja) | 2006-01-12 |
Family
ID=35781158
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/012581 WO2006004184A1 (ja) | 2004-07-07 | 2005-07-07 | 無線通信システム |
Country Status (2)
Country | Link |
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JP (1) | JP3732849B1 (ja) |
WO (1) | WO2006004184A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008193316A (ja) * | 2007-02-02 | 2008-08-21 | Toshiba Tec Corp | 無線通信システム及び無線キャリア伝送システム |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP7301609B2 (ja) * | 2019-06-05 | 2023-07-03 | 東芝テック株式会社 | 通信ケーブル |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5140808A (ja) * | 1974-08-07 | 1976-04-06 | Coal Industry Patents Ltd | |
JPS62219725A (ja) * | 1986-03-19 | 1987-09-28 | Victor Co Of Japan Ltd | 無線情報提供システム |
JPH09130322A (ja) * | 1995-11-02 | 1997-05-16 | Kokusai Electric Co Ltd | 移動体通信用中継増幅システム |
-
2004
- 2004-07-07 JP JP2004200455A patent/JP3732849B1/ja not_active Expired - Fee Related
-
2005
- 2005-07-07 WO PCT/JP2005/012581 patent/WO2006004184A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5140808A (ja) * | 1974-08-07 | 1976-04-06 | Coal Industry Patents Ltd | |
JPS62219725A (ja) * | 1986-03-19 | 1987-09-28 | Victor Co Of Japan Ltd | 無線情報提供システム |
JPH09130322A (ja) * | 1995-11-02 | 1997-05-16 | Kokusai Electric Co Ltd | 移動体通信用中継増幅システム |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008193316A (ja) * | 2007-02-02 | 2008-08-21 | Toshiba Tec Corp | 無線通信システム及び無線キャリア伝送システム |
Also Published As
Publication number | Publication date |
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JP3732849B1 (ja) | 2006-01-11 |
JP2006025093A (ja) | 2006-01-26 |
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