WO2009078608A2 - Système de réseau optiques pour fourniture de services sans fil à bande large - Google Patents

Système de réseau optiques pour fourniture de services sans fil à bande large Download PDF

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Publication number
WO2009078608A2
WO2009078608A2 PCT/KR2008/007202 KR2008007202W WO2009078608A2 WO 2009078608 A2 WO2009078608 A2 WO 2009078608A2 KR 2008007202 W KR2008007202 W KR 2008007202W WO 2009078608 A2 WO2009078608 A2 WO 2009078608A2
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WO
WIPO (PCT)
Prior art keywords
optical
downlink
network system
optical signal
olt
Prior art date
Application number
PCT/KR2008/007202
Other languages
English (en)
Other versions
WO2009078608A3 (fr
Inventor
Byoung Whi Kim
Bong Tae Kim
Original Assignee
Electronics And Telecommunications Research Institute
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
Application filed by Electronics And Telecommunications Research Institute filed Critical Electronics And Telecommunications Research Institute
Priority to CN2008801268867A priority Critical patent/CN101946429A/zh
Publication of WO2009078608A2 publication Critical patent/WO2009078608A2/fr
Publication of WO2009078608A3 publication Critical patent/WO2009078608A3/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0282—WDM tree architectures
    • 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
    • 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
    • H04B10/27—Arrangements for networking

Definitions

  • the present invention relates to an optical network system for providing wireless broadband services.
  • High-Speed Downlink Packet Access can support an uplink speed of 2 Mbps and a downlink speed of 14.4 Mbps
  • Wireless Broadband can support an uplink speed of 6 Mbps and a downlink speed of 19.97 Mbps
  • WiBro-Evolution Wibro-Evo whose development is underway is expected to support an uplink speed of 50 Mbps and a downlink speed of 50 Mbps.
  • downlink data may be transmitted to a plurality of access points (APs), and the APs wirelessly transmit the downlink data to a plurality of subscriber terminals.
  • uplink data is wirelessly transmitted to a plurality of APs by a plurality of subscriber terminals. Then, the uplink data collected by the APs is transmitted to a center, to which the APs are point-to-point connected, in a wired manner.
  • the present invention provides a wavelength division multiplexing (WDM) optical network system which can reduce the consumption of optical fibers by efficiently connecting a plurality of access points (APs) and a center.
  • WDM wavelength division multiplexing
  • an optical network system including an optical line terminal (OLT); and at least one optical network unit (ONU), wherein the OLT broadcasts downlink data to the ONU with the aid of a light source and the ONU transmits data to the OLT through a predetermined optical wavelength.
  • OLT optical line terminal
  • ONU optical network unit
  • a center may broadcast data to a plurality of APs with the aid of a single light source, and the APs may transmit data to the center through a predetermined optical wavelength. Therefore, it is possible to reduce the consumption of optical fibers between the center and the APs by using dense WDM (DWDM) to transmit uplink data.
  • DWDM dense WDM
  • an optical transmitter/receiver apparatus that can be used in each of the APs may be able to operate independently of the wavelength of light. Therefore, it is possible to establish a WDM optical network capable of efficiently connecting the center and the APs.
  • FIG. 1 illustrates a block diagram of an optical network system according to an exemplary embodiment of the present invention
  • FIG. 2 illustrates a spectrum diagram of unpolarized light emitted from a seed light module
  • FIG. 3 illustrates a spectrum diagram of polarized light emitted from a seed light module
  • FIG. 4 illustrates a diagram of various wavelengths that can be used in the optical network system shown in FIG. 1 ;
  • FIG. 5 illustrates a block diagram of an optical network system according to another exemplary embodiment of the present invention.
  • FIG. 6 illustrates a block diagram of an optical network system according to another exemplary embodiment of the present invention.
  • FIG. 7 illustrates a block diagram of an optical network system according to another exemplary embodiment of the present invention
  • FIG. 8 illustrates a block diagram of an optical network system according to another exemplary embodiment of the present invention
  • FIG. 9 illustrates a block diagram of an optical network system according to another exemplary embodiment of the present invention.
  • FIG. 10 illustrates a block diagram of an optical network system according to another exemplary embodiment of the present invention.
  • FIG. 11 illustrates a block diagram of an optical network system according to another exemplary embodiment of the present invention.
  • FIG. 12 illustrates a block diagram of an optical network system according to another exemplary embodiment of the present invention.
  • FIG. 13 illustrates a block diagram of an optical network system according to another exemplary embodiment of the present invention.
  • FIG. 1 illustrates a block diagram of an optical network system according to an exemplary embodiment of the present invention.
  • the optical network system may include an optical line terminal 200, a remote node (RN) 300, and a plurality of optical network units (ONUs) 400- 1 through 400-N.
  • RN remote node
  • ONUs optical network units
  • the OLT 200 may include a seed light module 210, an optical transmitter 220, a first circulator 250, a second circulator 260, a plurality of optical receivers 230- 1 through 230-N, and an optical wavelength demultiplexer 240.
  • the optical transmitter 220 may transmit an optical signal including downlink data.
  • the optical transmitter 220 may be a reflective semiconductor optical amplifier (RSOA).
  • the seed light module 210 may provide seed light to the optical transmitter 220.
  • the first circulator 250 may transmit the seed light to the optical transmitter 220 and may transmit a downlink optical signal provided by the optical transmitter 220 to the second circulator 260.
  • the second circulator 260 may transmit the downlink optical signal to an external optical fiber and may transmit an uplink optical signal to the optical wavelength demultiplexer (DMUX) 240.
  • the optical receivers 230- 1 through 23On may receive the uplink optical signal.
  • the optical wavelength demultiplexer 240 may demultiplex an uplink optical signal into a plurality of wavelengths.
  • the RN 300 may include an optical wavelength multiplexer/demultiplexer 310.
  • the optical wavelength multiplexer/demultiplexer 310 may receive a multiplexed downlink optical signal from the OLT 200, and may demultiplex the received multiplexed downlink optical signal.
  • the optical wavelength multiplexer/demultiplexer 310 may receive a plurality of optical signals having different wavelengths from the ONUs 400-1 through 400-N, and may multiplex the received optical signals.
  • the ONUs 400- 1 through 400-N may include a plurality of optical receivers 420- 1 through 420-N, respectively, a plurality of optical transmitters 410-1 through 410-N, respectively, and a plurality of optical filters 430-1 through 430-N, respectively.
  • Each of the optical receivers 420- 1 through 420-N may receive a downlink optical signal and may restore downlink information from the received downlink optical signal.
  • Each of the optical transmitters 410-1 through 410-N may convert uplink data into an optical signal and may output the optical signal.
  • the optical filters 430-1 through 430-N may transmit a downlink optical signal to the optical receivers 420- 1 through 420-N, respectively.
  • the optical fibers 430-1 through 430-N may transmit a plurality of uplink optical signals respectively provided by the optical transmitters 410-1 through 410-N to the RN 300.
  • Multiplexed light provided by the seed light module 210 may be input to a second port of the first circulator 250, and may be output from a first port of the first circulator 250.
  • the multiplexed light output from the first port of the first circulator 250 may be input to the optical transmitter 220 as seed light.
  • the optical transmitter 220 may amplify the seed light, and may modulate the amplified seed light based on downlink data. Thereafter, the optical transmitter 220 may output the modulated seed light as a downlink optical signal.
  • the downlink optical signal output by the optical transmitter 220 may be input to the second port of the first circulator 250, and may be output from a third port of the first circulator 250.
  • the downlink optical signal output from the third port of the first circulator 250 may be input to a third port of the second circulator 250, and may be output from a first port of the second circulator 250.
  • the downlink optical signal output from the first port of the second circulator 260 may be transmitted to an external optical fiber.
  • a plurality of multiplexed uplink optical signals provided by the ONUs 400- 1 through 400-N may be input to the first port of the second circulator 260, and may be output from the second port of the second circulator 260.
  • the uplink optical signals output from the second port of the second circulator 260 may be input to the optical wavelength demultiplexer 240.
  • the optical wavelength demultiplexer 240 may demultiplex the uplink optical signals input thereto.
  • the demultiplexed uplink optical signals may be input to the optical receivers 230- 1 through 230-N, respectively.
  • the optical receivers 230- 1 through 230-N may convert the demultiplexed uplink optical signals input thereto into electric signals and may thus restore uplink data.
  • An optical signal provided by the RN 300 may be input to the optical receivers 420-1 through 420-N through the optical filters 430- 1 through 430-N and may be converted into an electric signal. Thereafter, downlink data may be restored from the electric signal.
  • the optical transmitters 410-1 through 410-N may transmit a plurality of uplink optical signals including uplink data to the RN 300 through the optical filters 430-1 through 430-N.
  • FIGS 2 and 3 illustrate spectrum diagrams of light emitted from a seed light module.
  • light emitted from a seed light module may be unpolarized light into which wavelengths with a wide spectral width are multiplexed.
  • light emitted from a seed light module may be polarized light into which wavelengths with a narrow spectral width are multiplexed.
  • FIG. 4 illustrates a diagram of various wavelengths that can be used in the optical network system shown in FIG. 1.
  • a downlink optical wavelength band and an uplink optical wavelength band satisfy the free spectral range (FSR) properties of the optical wavelength multiplexer/demultiplexer 310 of the RN 300.
  • FSR free spectral range
  • FIG. 5 illustrates a block diagram of an optical network system according to another exemplary embodiment of the present invention.
  • the optical network system shown in FIG. 5 is similar to the exemplary embodiment of FIG. 1 except that a plurality of ONUs 400-1 through 400-N may include a plurality of RSOAs 410-1 through 410-N, respectively, instead of optical transmitters.
  • the ONUs may include a plurality of optical couplers 440-1 through 440-N, respectively, the RSOAs 410-1 through 410-N, respectively, and a plurality of optical receivers 420- 1 through 420-N, respectively.
  • a downlink optical signal provided by an RN 300 may be input to each of the ONUs 400-1 through 400-N.
  • Each of the optical couplers 440- 1 through 440-N may divide a downlink optical signal input thereto into two portions, and may transmit one of the two portions to a corresponding RSOA and the other portion to a corresponding optical receiver.
  • a downlink optical signal input to each of the optical receivers 420-1 through 420-N may be converted into an electric signal, and downlink data may be restored from the electric signal.
  • An optical signal input to each of the RSOAs 410-1 through 410-N may be flattened by the corresponding optical receiver, and the flattened optical signal may be used as uplink light.
  • the RSOAs 410-1 through 410-N may modulate flattened light based on uplink data, and may output the modulated light to the RN 300.
  • a downlink optical signal is used as seed light for driving the RSOAs 410-1 through 410-N of the ONUs 400- 1 through 400-N, there is no need to provide seed light. Since a downlink optical signal is used as uplink light, uplink light may have the same wavelength as that of downlink light. Therefore, since there is no need to satisfy the FSR of an optical wavelength multiplexer/demultiplexer 310 of the RN 300, it is possible to perform demultiplexing at various points in an optical network system. In addition, since the RSOAs 410-1 through 410-N generate an uplink optical signal by flattening, amplifying and modulating a downlink optical signal, it is possible to configure an optical transmitter independently of the wavelength of light.
  • FIG. 6 illustrates a block diagram of an optical network system according to an exemplary embodiment of the present invention.
  • the optical network system shown in FIG. 6 is similar to the optical network system shown in FIG. 5 except that a feeder section between an OLT 200 and an RN 300 is constituted by two separate optical fibers, and that an uplink optical signal and a downlink optical signal are transmitted through different optical fibers.
  • the RN 300 may include a second circulator 260, whereas, in the exemplary embodiment of FIG. 5, the OLT 200 includes the second circulator 260.
  • a downlink optical signal provided by the OLT 200 may be input to a third port of a circulator 320, and may be output from a first port of the circulator 320.
  • An uplink optical signal output from an optical wavelength multiplexer/demultiplexer 310 of the RN 300 may be input to the first port of the circulator 320, and may be output from a second port of the circulator 320.
  • FIG. 7 illustrates a block diagram of an optical network system according to an exemplary embodiment of the present invention.
  • the optical network system shown in FIG. 7 is similar to the optical network system shown in FIG. 5 except that an optical wavelength multiplexer/demultiplexer 310 include a plurality of optical power splitters 330-1 through 330-N for different wavelengths. More specifically, referring to FIG. 7, a downlink optical signal obtained by demultiplexing performed by the optical wavelength multiplexer/demultiplexer 310 is split into M portions by each of the optical power splitters 330-1 through 330-N. The M portions may be input to M ONUs 400- 1 through 400-M.
  • a plurality of uplink optical signals provided by the M ONUs 400-1 through 400-M may be gathered by each of the optical power splitters 330-1 through 330-N, and may then be multiplexed along with other optical signals by the optical wavelength multiplexer/demultiplexer 310. The result of the multiplexing may be output to the OLT 200.
  • FIG. 8 illustrates a block diagram of an optical network system according to another exemplary embodiment of the present invention.
  • the optical network system shown in FIG. 8 is similar to the optical network system shown in FIG. 7 except that a feeder section between an OLT 200 and an RN 300 is constituted by two separate optical fibers.
  • a circulator 320 separating an uplink optical signal and a downlink optical signal may be installed in the RN 300.
  • FIG. 9 illustrates a block diagram of an optical network system according to another exemplary embodiment of the present invention.
  • the optical network system shown in FIG. 9 is similar to the optical network system shown in FIG. 5 except that a seed light module 210 of an OLT 200 uses an external modulator 270, instead of using an RSOA, to generate a downlink optical signal.
  • a seed light module 210 of an OLT 200 uses an external modulator 270, instead of using an RSOA, to generate a downlink optical signal.
  • FIG. 10 illustrates a block diagram of an optical network system according to another exemplary embodiment of the present invention.
  • the optical network system shown in FIG. 10 is similar to the optical network system shown in FIG. 5 except that a seed light module 210 of an OLT 200 uses a semiconductor optical amplifier (SOA) 280, instead of using an RSOA, to generate a downlink optical signal.
  • SOA semiconductor optical amplifier
  • FIG. 11 illustrates a block diagram of an optical network system according to another exemplary embodiment of the present invention.
  • the optical network system shown in FIG. 11 is similar to the optical network system shown in FIG. 10 except that the optical network system shown in FIG. 11 includes a plurality of first and second RNs 300- 1 and 300-2 and can thus enable demultiplexing to be performed at various points in the optical network system shown in FIG. 11.
  • the first RN 300-1 may include an optical add/drop multiplexer (OADM) 330-1, which adds or drops first through k-th wavelengths A / through A k and allows the transmission of other wavelengths.
  • the second RN 300-2 may include an OADM 330-2, which adds or drops (k+l)-th through p-th wavelengths A k+1 through A p and allows the transmission of other wavelengths. Even though only two RNs are illustrated in FIG. 11, the optical network system shown in FIG. 11 may include more than two RNs.
  • the first RN 300-1 may also include a wavelength division multiplexing (WDM) multiplexer/demultiplexer 310-1, which multiplexes or demultiplexes the first through k-th wavelengths A / through A k .
  • the second RN 300-2 may also include a WDM multiplexer/demultiplexer 310-2, which multiplexes or demultiplexes the (k+l)-th through p-th wavelengths A k+1 through A p .
  • a plurality of optical signals added by the OADM 330-1 or 330-2 may be transmitted to an OLT.
  • FIG. 12 illustrates a block diagram of an optical network system according to another exemplary embodiment of the present invention.
  • the optical network system shown in FIG. 12 is similar to the optical network system shown in FIG. 11 except that the optical network system shown in FIG. 12 is of a ring-type whereas the optical network system shown in FIG. 11 is of a linear type.
  • a first RN 300-1 may drop only certain wavelengths from downlink light provided by an SOA 280 of an OLT 200, and an OADM 330-1 of the first RN 300-1 may demultiplex the dropped wavelengths. Thereafter, the results of the demultiplexing may be transmitted to a plurality of ONUs 400-1 through 400- K.
  • a plurality of optical signals provided by the ONUs 400-1 through 400-K may be multiplexed by a WDM multiplexer/demultiplexer 310-1, and some wavelengths may be added to the result of the multiplexing by the OADM 330-1. Thereafter, an optical signal obtained by the addition performed by the OADM 330-1 may be transmitted to a second RN 300-2.
  • An OADM 330-2 of the second RN 300-2 may drop some wavelengths from the optical signal received by the second RN 300-2, and a WDM multiplexer/demultiplexer 310-2 may demultiplex the resulting optical signal.
  • the results of the demultiplexing may be transmitted to a plurality of ONUs 400-k+l through 400-p.
  • a plurality of optical signals provided by the ONUs 400-k+l through 400-p may be multiplexed by the WDM multiplexer/demultiplexer 310-2, and some wavelengths may be added to the result of the multiplexing by the OADM 330-2. Thereafter, an optical signal obtained by the addition may be transmitted to a third RN (not shown) or to a WDM demultiplexer 240 of the OLT 200.
  • FIG. 13 illustrates a block diagram of an optical network system according to another exemplary embodiment of the present invention.
  • the optical network system shown in FIG. 13 is similar to the optical network system shown in FIG. 5 except that each of a plurality of ONUs 400- 1 through 400-N includes a switch (not shown) and a plurality of downlink ports (not shown) and may thus be able to be connected to a plurality of subordinate terminals.
  • the present invention can be suitable for use in the transmission of data between a center and a plurality of access points (APs) in a wireless optical network system such as WiBro supporting the transmission of large amounts of data.
  • APs access points

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computing Systems (AREA)
  • Optical Communication System (AREA)
  • Small-Scale Networks (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un système de réseau optiques pour la fourniture de services sans fil à bande large. Ce système peut inclure un terminal de ligne optique et au moins une unité de réseau optique. Le terminal de ligne optique diffuse des données en liaison descendante à l'unité de réseau optique et cette dernière transmet des données au terminal de ligne optique sur une longueur d'onde optique prédéterminée. Il est donc possible d'identifier facilement quel terminal à transmis un signal optique à un centre à partir de la longueur d'onde dudit signal optique et de réduire la consommation de fibres optiques entre le centre et le nombre de points d'accès.
PCT/KR2008/007202 2007-12-14 2008-12-05 Système de réseau optiques pour fourniture de services sans fil à bande large WO2009078608A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2008801268867A CN101946429A (zh) 2007-12-14 2008-12-05 用于提供无线宽带服务的光网络系统

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2007-0131342 2007-12-14
KR1020070131342A KR101404107B1 (ko) 2007-12-14 2007-12-14 광대역 무선 서비스를 위한 광 네트워크 시스템

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WO2009078608A2 true WO2009078608A2 (fr) 2009-06-25
WO2009078608A3 WO2009078608A3 (fr) 2009-08-13

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101986718A (zh) * 2010-11-16 2011-03-16 中兴通讯股份有限公司 无源光网络系统及系统中的光线路终端和波长路由单元
CN103199918A (zh) * 2013-04-19 2013-07-10 上海大学 波分复用无源光网络实现波长再利用和保护功能的系统和方法
CN111246387A (zh) * 2019-01-22 2020-06-05 中国信息通信研究院 一种宽带网络网关获取位置信息的方法和系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040184806A1 (en) * 2003-03-17 2004-09-23 Ki-Cheol Lee Wavelength division multiplexing-passive optical network capable of integrating broadcast and communication services
US20050053376A1 (en) * 2003-09-08 2005-03-10 Young-Hun Joo FTTH system for convergence of broadcasting and communication through switched broadcasting
US20060018334A1 (en) * 2004-07-22 2006-01-26 Samsung Electronics Co.; Ltd Communication/broadcast multiplexer and demultiplexer used in communication/broadcast-integrated system
KR20060008036A (ko) * 2004-07-23 2006-01-26 주식회사 케이티 Ｆｔｔｈ형 파장분할다중화방식 수동 광가입자망 시스템
WO2007002255A1 (fr) * 2005-06-23 2007-01-04 Hitachi Data Systems Corporation Systeme de recherche renvoyant des resultats de recherche sous la forme de fichiers dans un systeme de fichiers
US7286761B2 (en) * 2000-08-03 2007-10-23 At&T Corp. Method of flexible multiple broadcast service delivery over a WDM passive optical network based on RF Block-conversion of RF service bands within wavelength bands

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100819034B1 (ko) * 2006-05-11 2008-04-03 한국전자통신연구원 반사형 반도체 광증폭기 기반 수동형 광가입자망

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7286761B2 (en) * 2000-08-03 2007-10-23 At&T Corp. Method of flexible multiple broadcast service delivery over a WDM passive optical network based on RF Block-conversion of RF service bands within wavelength bands
US20040184806A1 (en) * 2003-03-17 2004-09-23 Ki-Cheol Lee Wavelength division multiplexing-passive optical network capable of integrating broadcast and communication services
US20050053376A1 (en) * 2003-09-08 2005-03-10 Young-Hun Joo FTTH system for convergence of broadcasting and communication through switched broadcasting
US20060018334A1 (en) * 2004-07-22 2006-01-26 Samsung Electronics Co.; Ltd Communication/broadcast multiplexer and demultiplexer used in communication/broadcast-integrated system
KR20060008036A (ko) * 2004-07-23 2006-01-26 주식회사 케이티 Ｆｔｔｈ형 파장분할다중화방식 수동 광가입자망 시스템
WO2007002255A1 (fr) * 2005-06-23 2007-01-04 Hitachi Data Systems Corporation Systeme de recherche renvoyant des resultats de recherche sous la forme de fichiers dans un systeme de fichiers

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101986718A (zh) * 2010-11-16 2011-03-16 中兴通讯股份有限公司 无源光网络系统及系统中的光线路终端和波长路由单元
WO2012065460A1 (fr) * 2010-11-16 2012-05-24 中兴通讯股份有限公司 Procédé et système de réseau optique passif, terminal de ligne optique et unité de routage de longueur d'onde
CN103199918A (zh) * 2013-04-19 2013-07-10 上海大学 波分复用无源光网络实现波长再利用和保护功能的系统和方法
CN111246387A (zh) * 2019-01-22 2020-06-05 中国信息通信研究院 一种宽带网络网关获取位置信息的方法和系统
CN111246387B (zh) * 2019-01-22 2021-01-15 中国信息通信研究院 一种宽带网络网关获取位置信息的方法和系统

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WO2009078608A3 (fr) 2009-08-13
KR20090063834A (ko) 2009-06-18
KR101404107B1 (ko) 2014-06-10
CN101946429A (zh) 2011-01-12

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