[go: up one dir, main page]

WO2015106764A1 - Système de radiocommunication d'éolienne - Google Patents

Système de radiocommunication d'éolienne Download PDF

Info

Publication number
WO2015106764A1
WO2015106764A1 PCT/DK2015/050009 DK2015050009W WO2015106764A1 WO 2015106764 A1 WO2015106764 A1 WO 2015106764A1 DK 2015050009 W DK2015050009 W DK 2015050009W WO 2015106764 A1 WO2015106764 A1 WO 2015106764A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
wind turbine
communication system
tower
repeater
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/DK2015/050009
Other languages
English (en)
Inventor
Per Holgersen
Bjarke Thagaard Ovesen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SEMCO MARITIME AS
Original Assignee
SEMCO MARITIME AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=52344907&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2015106764(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DK201470015A external-priority patent/DK177980B1/da
Application filed by SEMCO MARITIME AS filed Critical SEMCO MARITIME AS
Priority to EP15700169.4A priority Critical patent/EP3095177A1/fr
Publication of WO2015106764A1 publication Critical patent/WO2015106764A1/fr
Priority to DKBA201600073U priority patent/DK201600073Y3/da
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15507—Relay station based processing for cell extension or control of coverage area
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/80—Arrangement of components within nacelles or towers
    • F03D80/82—Arrangement of components within nacelles or towers of electrical components
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/90—Mounting on supporting structures or systems
    • F05B2240/95—Mounting on supporting structures or systems offshore
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/727—Offshore wind turbines

Definitions

  • the present invention relates to a wind turbine radio communication system. More particularly, the invention relates to a system for providing radio communication coverage within a wind turbine tower and/or transition piece (TP).
  • TP transition piece
  • US 2002/0028655 Al discloses a repeater system for wireless communications, particularly for cellular phones.
  • the repeater system includes a repeater coupled to an inside antenna system and to an outside antenna system, wherein the inside antenna system is inside a structure in the form of an edifice or a vessel.
  • the document is silent about use in wind turbine towers and/or transition pieces.
  • the communication system is a digital two-way radio system, and comprises an outside antenna for being mounted outside of a wind turbine structure.
  • the system further comprises an inside tower antenna for being mounted inside the wind turbine tower, and an inside transition piece (TP) antenna for being mounted inside a wind turbine transition piece.
  • TP transition piece
  • the system comprises a digital two-way radio system repeater for being in
  • the repeater being configured for relaying radio signals received with the outside antenna with the inside tower antenna and/or inside TP antenna, and vice versa.
  • the problem of obtaining radio coverage within the wind turbine tower and/or TP may be alleviated, thereby greatly improving security for e.g. technicians working within the wind turbine. More specifically, the
  • the digital two-way radio system is a terrestrial trunked radio (TETRA) system.
  • TETRA terrestrial trunked radio
  • the system may provide "seam-less" radio coverage for personnel entering the wind turbine with a suitable radio terminal.
  • no manual intervention is required to adjust the radio terminal when moving from outside to inside the tower, or vice versa.
  • the digital two-way radio system repeater comprises a squelch circuit, which is adapted to turn off transmission from the outside antenna except when receiving radio transmission within a monitoring frequency band on the inside tower antenna and/or the inside TP antenna.
  • the squelch circuit acts to suppress radio transmission from the outside tower antenna when there is no radio activity inside the wind turbine, i.e. when no personnel is present inside the tower and/or the transition piece.
  • a problem is alleviated wherein otherwise, e.g. a remote base station in radio contact with multiple wind turbine radio communication systems could be overloaded by cumulative noise transmissions from otherwise inactive communication systems. This could e.g. be the case in a wind turbine field where a central base station provides digital two-way radio coverage to the field.
  • the repeater automatically receives signals from the radio transceiver on the inside tower antenna or the inside TP antenna and therefore begins to relay the signals to the outside tower antenna. Thus, no action is needed from the person in order to activate the communication system.
  • a bandwidth of the monitoring frequency band is in the range of lMHz-50MHz, such as 2MHz-20MHz, or even 3MHz-10MHz. More particularly, the bandwidth of the monitoring frequency band could be about 5MHz.
  • the digital two-way radio system is a Digital Mobile Radio (DMR) system.
  • the outside antenna is an omni-directional antenna. In this way, a particularly versatile communication system may be achieved in that a communication party located outside the tower may obtain a good radio connection to the communication system, irrespective of a position of that communication party, relative to the wind turbine.
  • the outside antenna is a directional antenna.
  • the directional outside antenna may enable an uplink to a distal radio transceiver with improved signal strength and/or transmission range.
  • the inside tower antenna is a directional, circularly polarized antenna. In this way, an improved transmission range is obtained within the wind turbine tower, i.e. so as to provide radio coverage throughout the height of the tower. For instance, if the inside tower antenna is mounted at the bottom of the tower, use of a directional and circularly polarized antenna enables radio coverage toward the top of the tower.
  • wind turbine towers are metallic cylinders, which provides for particularly difficult radio communication inside the tower, e.g. due to the tower being a large waveguide for the signals. The present inventors have realized that detrimental back-reflections of radio waves arising from metallic objects and walls within the tower may be reduced by using a circularly polarized antenna.
  • the inside tower antenna is a flat-panel antenna.
  • a particularly space-efficient inside tower antenna may be achieved.
  • the inside tower antenna and inside TP antenna are nominally identical. In this way, a particularly cost-efficient and simplified system may be achieved that uses fewer parts. Thus costs related to keeping stock or inventory may be reduced, by allowing interchanging antennas e.g. in case of malfunction or maintenance.
  • the inside TP antenna is a directional, circularly polarized antenna. In this way, an improved
  • the transmission range is obtained within the wind turbine transition piece, i.e. so as to provide radio coverage substantially throughout TP from the foundation to the tower.
  • the inside TP antenna is mounted at the top of the TP, use of a directional and circularly polarized antenna enables radio coverage toward the bottom of the TP.
  • the inside TP antenna may be mounted at the bottom of the tower in a vicinity to the top of the TP. Advantages of using a circularly polarized antenna were discussed above when describing the inside tower antenna, but also applies to the inside TP antenna.
  • the inside TP antenna is a flat-panel antenna.
  • the repeater is a trunk-mode-operation/trunk-mode-operation (TMO/TMO) repeater.
  • TMI/TMO trunk-mode-operation/trunk-mode-operation
  • the repeater is a TETRA repeater, and optionally the outside and/or inside antennas is/are configured for a Rx/Tx- channel spacing of nominally 14.5MHz.
  • the repeater and optionally the outside and/or inside antennas is/are configured for a Rx/Tx- channel spacing of nominally 10MHz.
  • the system is adapted for the standard frequency spacing of a TETRA system.
  • the repeater and optionally the outside and/or inside antennas is/are configured for a Rx/Tx- channel spacing of nominally 7MHz.
  • the repeater is configured for providing a reduced antenna power output on the inside TP antenna, when compared to the antenna power output of the inside tower antenna. Since the volume of TP is generally less than the volume of the tower, sufficient radio coverage in the TP may be achieved using less output power. In this way, power efficiency is improved, and the risk of detrimental reflections of the radio waves is reduced.
  • the repeater is adapted for transmitting state messages indicating an operational status of the communication system, preferably via a Simple Network Management Protocol (SNMP) module comprised by the repeater.
  • SNMP Simple Network Management Protocol
  • the SNMP module is adapted for transmitting data signals over a local area network (LAN) connection.
  • LAN local area network
  • the system comprises a digital two-way radio transceiver comprising a monitoring circuit for monitoring an operational status of the digital two-way radio system repeater, the transceiver being configured for transmitting state messages indicating the operational status via the outside tower antenna.
  • a digital two-way radio transceiver comprising a monitoring circuit for monitoring an operational status of the digital two-way radio system repeater, the transceiver being configured for transmitting state messages indicating the operational status via the outside tower antenna.
  • this embodiment may also be combined with the use of a SNMP module as described above, so as to transmit state messages in multiple ways.
  • transmission of state messages may be triggered by polling from a remote location via the outside antenna.
  • transmission of state messages may be triggered internally by the communication system.
  • the communication system may be configure to transmit such messages at regular time intervals, or at particular times.
  • the invention is particularly, but not exclusively, advantageous for obtaining improved radio communication coverage within wind turbine structures, such as the wind turbine tower and transition piece.
  • the invention is also particularly, but not
  • the wind turbine is an offshore wind turbine.
  • the wind turbine is an onshore wind turbine.
  • the inside tower antenna is mounted in a bottom part of the wind turbine tower, and oriented to emit in a generally upwards vertical direction.
  • the inside TP antenna is mounted in an upper part of the wind turbine transition piece or in a bottom part of the wind turbine tower, and oriented to emit in a generally downwards vertical direction.
  • the first and second aspect of the present invention may each be combined with any of the other aspects.
  • Figure 1 illustrates a wind turbine comprising the wind turbine communication system according to an embodiment of the invention.
  • Figure 2 schematically shows a communication system according to another embodiment of the invention.
  • Figure la illustrates a wind turbine 1, comprising a wind turbine tower 2, mounted on a transition piece (TP) 3.
  • the wind turbine shown is an off-shore wind turbine, as indicated by the sea surface 4.
  • the wind turbine further comprises a radio communication system 10 as highlighted in Figure lb.
  • the communication system is illustrated to be installed towards the bottom of the wind turbine tower 2, although other locations may also be envisioned.
  • the system 10 comprises an outside antenna 12 mounted in a suitable position outside the wind turbine tower 2.
  • the outside antenna 12 is connected via cable to a digital two-way radio system repeater 14.
  • the repeater 14 is here illustrated to be mounted inside the tower 2, but may in other embodiments be mounted outside the tower, e.g. in proximity to or in connection with the outside antenna 12.
  • the repeater 14 is further connected by cable to an inside tower antenna 16, which is arranged to emit primarily in a vertical upwards direction, as indicated by the zigzag line 18.
  • the repeater may comprise a squelch circuit (not illustrated) which acts to turn off radio transmission from the outside antenna 12 when no radio activity is detected by the inside tower antenna.
  • the system operates according to the TETRA standard.
  • the outside antenna 12, inside tower antenna 16, and the repeater 14 are all adapted for the specific radio frequencies used.
  • the repeater is preferably configured as a trunk-mode-operation (TMO)/ Trunk-mode-operation (TMO) repeater, i.e. to seamlessly relay the received TETRA signal from the outside into the tower and vice versa.
  • the repeater 14 is further equipped with an online monitoring system, e.g. connected via a local area network - and configured for transmitting status and/or performance data from the repeater to a remote location.
  • the online monitoring system is preferably a Simple Network Management Protocol (SNMP) module.
  • SNMP Simple Network Management Protocol
  • the communication system may also have a built-in radio transceiver that has a monitoring circuit for monitoring the operational status of the repeater, and is configures so as to transmit state messages about this operational status of the repeater via the outside tower antenna.
  • transmission of the state messages may be performed independently from the repeater, and thereby e.g. also if the repeater is un-operational. Transmission of the state messages may in some implementations be triggered from within the communication system, e.g. in response to a change in state, or at given time intervals/specific times.
  • transmission may be triggered by an external poll signal received by the radio transceiver.
  • a remote base station may address a specific communication system and poll for a status reply. In this way, the base station may monitor multiple wind turbine communication systems by polling each one in sequence.
  • the system operates according to the Digital Mobile Radio (DMR) standard.
  • DMR Digital Mobile Radio
  • the inventors have found that a particularly good radio coverage within the wind turbine tower may be achieved by using an inside tower antenna which is designed to emit circularly polarized radio waves. This polarization has been found to minimize interfering reflections from the tower structure.
  • Such an antenna may preferably be of a flat-panel type, to minimize space consumption within the wind turbine.
  • the outside antenna 12 is preferably of an omni-directional type so as to enable radio communication with radio operators outside the wind turbine, regardless of their position in relation to the turbine.
  • Figure 2 shows another embodiment of the communication system according to the invention when mounted in a wind turbine.
  • the embodiment relates to the one shown in Figure lb, for which reason only the differences between the two embodiments are described.
  • the communication system 10 comprises an inside TP antenna 20 in addition to the inside tower antenna 16.
  • the inside TP antenna 20 is located and oriented to emit primarily in a downwards vertical direction, as indicated by the line 22.
  • the inside TP antenna 20 provides improved radio communication coverage in the TP - in addition to the coverage in the tower provided by the inside tower antenna 16.
  • the repeater 14 is adapted to relay outside communication received on the outside antenna 12 onto both the inside tower antenna 16 and the inside TP antenna 20 simultaneously, so as to provide seamless operation throughout the wind turbine structures of both tower and TP. Since the volume of the TP is generally significantly less than the volume of the tower, the transmission output power on the inside TP antenna 20 is preferably reduced compared to the transmission output power on the inside tower antenna. In one embodiment, the output power on the inside TP antenna is -20dB, compared to the output power of the inside tower antenna. However, it is also envisioned that for other
  • the inside TP antenna 20 is preferably of the same or similar type as the inside tower antenna 16, such as a circularly polarized flat-panel antenna.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)

Abstract

La présente invention concerne un système de radiocommunication d'éolienne. Le système de communication est un système de radio bidirectionnelle numérique et comprend une antenne extérieure destinée à être fixée à l'extérieur d'une structure d'éolienne. Le système comprend en outre une antenne de tour intérieure destinée à être montée à l'intérieur de la tour d'éolienne, et une antenne de pièce de transition (TP) intérieure destinée à être montée à l'intérieur de la pièce de transition d'éolienne. Enfin, le système comprend un répéteur de système de radio bidirectionnelle numérique destiné à être en communication avec l'antenne extérieure, l'antenne de tour intérieure et l'antenne de TP intérieure, le répéteur étant configuré pour relayer les signaux radio, reçus avec l'antenne extérieure, avec l'antenne de tour intérieure et/ou l'antenne de TP intérieure, et vice versa. La présente invention concerne également une éolienne comprenant le système de radiocommunication.
PCT/DK2015/050009 2014-01-14 2015-01-14 Système de radiocommunication d'éolienne Ceased WO2015106764A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15700169.4A EP3095177A1 (fr) 2014-01-14 2015-01-14 Système de radiocommunication d'éolienne
DKBA201600073U DK201600073Y3 (da) 2014-01-14 2016-06-22 Vindmølle-radiokommunikationssystem

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DKPA201470015 2014-01-14
DK201470015A DK177980B1 (en) 2014-01-14 2014-01-14 Wind turbine radio communication system
DKPA201470484 2014-08-13
DKPA201470484 2014-08-13

Publications (1)

Publication Number Publication Date
WO2015106764A1 true WO2015106764A1 (fr) 2015-07-23

Family

ID=52344907

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2015/050009 Ceased WO2015106764A1 (fr) 2014-01-14 2015-01-14 Système de radiocommunication d'éolienne

Country Status (4)

Country Link
EP (1) EP3095177A1 (fr)
DE (1) DE202015009044U1 (fr)
DK (1) DK201600073Y3 (fr)
WO (1) WO2015106764A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11686289B2 (en) 2017-08-07 2023-06-27 Siemens Gamesa Renewable Energy A/S Method to control the operational status of a wind turbine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004111443A1 (fr) * 2003-06-11 2004-12-23 General Electric Company Arret a distance d'une turbine d'eolienne marine
WO2011102772A1 (fr) * 2010-02-19 2011-08-25 Telefonaktiebolaget L M Ericsson (Publ) Identification de nœud relais dans un réseau de communication
GB2483186A (en) * 2011-06-17 2012-02-29 Airwave Solutions Ltd Forming a repeated signal on a third carrier frequency by converting a third carrier frequency to a second carrier frequency for transmission to a repeater
GB2502143A (en) * 2012-05-18 2013-11-20 Stella Doradus Waterford Ltd A wireless signal repeater providing an amplified uplink channel when communication is detected on the uplink channel
US20130337872A1 (en) * 2012-05-23 2013-12-19 Bayerische Motoren Werke Aktiengesellschaft Piconet Base Station and Communication System for a Vehicle

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020028655A1 (en) 2000-07-14 2002-03-07 Rosener Douglas K. Repeater system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004111443A1 (fr) * 2003-06-11 2004-12-23 General Electric Company Arret a distance d'une turbine d'eolienne marine
WO2011102772A1 (fr) * 2010-02-19 2011-08-25 Telefonaktiebolaget L M Ericsson (Publ) Identification de nœud relais dans un réseau de communication
GB2483186A (en) * 2011-06-17 2012-02-29 Airwave Solutions Ltd Forming a repeated signal on a third carrier frequency by converting a third carrier frequency to a second carrier frequency for transmission to a repeater
GB2502143A (en) * 2012-05-18 2013-11-20 Stella Doradus Waterford Ltd A wireless signal repeater providing an amplified uplink channel when communication is detected on the uplink channel
US20130337872A1 (en) * 2012-05-23 2013-12-19 Bayerische Motoren Werke Aktiengesellschaft Piconet Base Station and Communication System for a Vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11686289B2 (en) 2017-08-07 2023-06-27 Siemens Gamesa Renewable Energy A/S Method to control the operational status of a wind turbine

Also Published As

Publication number Publication date
DK201600073Y3 (da) 2016-08-12
EP3095177A1 (fr) 2016-11-23
DE202015009044U1 (de) 2016-08-03
DK201600073U1 (da) 2016-07-08

Similar Documents

Publication Publication Date Title
US8457700B2 (en) GPS mast module and mobile radio installation
CN104380782B (zh) 适用于提供空对地连接的地面通信网络
CN115833902B (zh) 具有无线链路的卫星终端系统
US20110032849A1 (en) Systems and methods for mitigating interference between access points
WO2006123227A3 (fr) Dispositif, systeme et procede permettant de communiquer avec un avion par les tours d'une station de base cellulaire
CN101517924A (zh) 用于在蜂窝网络中提供专用容量的系统和方法
WO2013049385A3 (fr) Transmission de données de point à multipoint en hyperfréquences
KR20120014050A (ko) 안테나 어레이
JP2008131623A (ja) アンテナを内蔵したフィードーバック干渉信号除去無線中継装置
US20200021354A1 (en) Emergency responder install method
WO2015143943A1 (fr) Station de base
US9832002B2 (en) Phalanx radio system architecture for high capacity wireless communication
KR101442594B1 (ko) 공조 덕트를 이용한 무선 전송 시스템
US20180131401A1 (en) Wireless sfp module
KR20150133367A (ko) 선박용 무선통신 중계 장치
EP3095177A1 (fr) Système de radiocommunication d'éolienne
JP6761428B2 (ja) 衛星信号中継システム
CN105406907A (zh) 电子设备和该电子设备的控制方法
JP2009118494A (ja) 無線中継装置
DK177980B1 (en) Wind turbine radio communication system
KR101730614B1 (ko) 광대역 결합기를 이용한 인빌딩 서비스 방법과 그를 위한 인빌딩 시스템 및 광대역 결합기
US8577222B2 (en) Optical repeater system
EP1986268A1 (fr) Module d'antenne et appareil l'utilisant
KR101771598B1 (ko) 광대역 통신과 근거리 통신을 지원하는 중계 시스템 및 중계 장치
US20160050009A1 (en) System for coupling wireless repeater donor and server units over cable

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15700169

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
REEP Request for entry into the european phase

Ref document number: 2015700169

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2015700169

Country of ref document: EP