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1. 发明申请

US20190140762A1 Method And Network Node For Communication Over A Bidirectional Communication Link 审中-公开
公开(公告)号：US20190140762A1
公开(公告)日：2019-05-09
申请号：US16097647
申请日：2016-05-06
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Roberto Magri , Alberto Deho
IPC分类号： H04J14/02
CPC分类号： H04J14/0216 , H04J14/0283
摘要： A network node (400) for use with a single-fiber bidirectional communication link comprises a filter (300). The filter (300) comprises at least four ports. A first port (301) is configured to communicate with the single-fiber in a west direction. A second port (303) is configured to communicate with the single-fiber in an east direction. A third port (305) is configured to add/drop in the west direction. A fourth port (307) is configured to add/drop in the east direction. The network node is configured to add a first wavelength (λA) to the west direction and the east direction, and configured to drop a second wavelength (λB) from the west direction and the east direction.

2. 发明授权

US10819459B2 Network node and method 有权
公开(公告)号：US10819459B2
公开(公告)日：2020-10-27
申请号：US16088404
申请日：2016-04-01
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Roberto Magri , Alberto Deho
IPC分类号： H04J14/02
摘要： A network node (400) for use as a hub node of a network that further comprises one or more remote nodes, wherein the network node (400) is coupled to at least first and second connections (410, 412) for communication with one or more remote nodes, comprises a first band filter (403) adapted to separate a first aggregated signal (404) comprising a plurality of channel signals into a plurality of band signals (4081 to 408M). The network node (400) comprises a second band filter (405) and a third band filter (407) adapted to aggregate a plurality of band signals (4081 to 408M) into a second aggregated signal (406) comprising a plurality of channel signals and a third aggregated signal (413) comprising a plurality of channel signals, respectively. A switching module (409) is adapted to switch on a per-band granularity the plurality of band signals (4081 to 408M) between the first band filter (403) and either the second band filter (405) or the third band filter (407). The first band filter (403) may be adapted to aggregate the plurality of band signals (4081 to 408M) into the first aggregated signal (404); the second band filter (405) and a third band filter (407) may be adapted to separate the second aggregated signal (410) and third aggregated signal (412), respectively, into the plurality of band signals (4081 to 408M); and the switching module (409) may be adapted to switch on a per-band granularity the plurality of band signals (4081 to 408M) between either the second band filter (405) or the third band filter (407) and the first band filter (403).

3. 发明授权

US10700805B2 Method and network node for communication over a bidirectional communication link 有权
公开(公告)号：US10700805B2
公开(公告)日：2020-06-30
申请号：US16097647
申请日：2016-05-06
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Roberto Magri , Alberto Deho
IPC分类号： H04J14/02
摘要： A network node (400) for use with a single-fiber bidirectional communication link comprises a filter (300). The filter (300) comprises at least four ports. A first port (301) is configured to communicate with the single-fiber in a west direction. A second port (303) is configured to communicate with the single-fiber in an east direction. A third port (305) is configured to add/drop in the west direction. A fourth port (307) is configured to add/drop in the east direction. The network node is configured to add a first wavelength (λA) to the west direction and the east direction, and configured to drop a second wavelength (λB) from the west direction and the east direction.

4. 发明申请

US20180316418A1 Protection Apparatus for a Bidirection Optical Link 审中-公开
公开(公告)号：US20180316418A1
公开(公告)日：2018-11-01
申请号：US15769114
申请日：2016-02-01
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Roberto Magri , Alberto Deho , Fabio Falconi
IPC分类号： H04B10/032 , H04J14/02 , H04Q11/00
CPC分类号： H04B10/032 , H04J14/0282 , H04J14/029
摘要： According to embodiments of the present disclosure, apparatus is provided for protecting an optical link arranged to carry upstream optical signals and downstream optical signals. The apparatus comprises a first detector arranged to selectively detect a downstream optical signal received at a second port having a first wavelength and a second detector arranged to selectively detect a downstream optical signal received at the second port having a second wavelength different from the first wavelength. The apparatus further comprises control circuitry arranged to cause a protection switch to selectively couple a third port to the second port instead of to the first port based on the detecting by the first detector and the second detector. Also provided is a second apparatus for protecting the optical link. The second apparatus comprises a bypass element arranged to selectively direct at least a portion of an upstream optical signal at the first wavelength, received at a fourth port, such that a downstream optical signal at the first wavelength is transmitted from a fifth port.

5. 发明申请

US20220286221A1 Optical Node and Optical Transceiver for Auto Tuning of Operational Wavelength 有权
公开(公告)号：US20220286221A1
公开(公告)日：2022-09-08
申请号：US17637943
申请日：2019-09-06
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Roberto Magri , Paolo Debenedetti , Alberto Deho
IPC分类号： H04J14/02
摘要： An optical node (100) for multiplexing optical signals is disclosed. The optical node (100) comprises an add port (102), a common port (104), an auxiliary port (106), an optical transfer module (110), and a reflecting element (108) coupled to the auxiliary port. The optical transfer module (110) is configured to couple a signal received on the add port (102) and matching an operational wavelength of the optical node (100) to the common port (104), and to couple a signal received on the add port (102) and not matching an operational wavelength of the optical node (100) to the auxiliary port (106). The reflecting element (108) is configured to reflect a signal received on the auxiliary port (106) to the add port (102). Also disclosed are an optical transceiver and methods for operating and optical node and an optical transceiver.

6. 发明申请

US20220231766A1 Method and Apparatus for Optical Power Control 有权
公开(公告)号：US20220231766A1
公开(公告)日：2022-07-21
申请号：US17614802
申请日：2019-05-31
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Roberto Magri , Alberto Deho , Riccardo Ceccatelli
IPC分类号： H04B10/564 , H04B10/077 , H04B10/294 , H04J14/02
摘要： A method of power control of an optical signal transmitted by a first network element. The first network element comprising a laser and a bandpass filter operating on the optical signal produced by said laser, whereas the method comprises receiving (106) information indicative of a power level of the optical signal transmitted by the first network element; and tuning (110) the laser output wavelength in response to said received information.

7. 发明授权

US11296785B2 Methods and apparatus for fiber optic line fault determination 有权
公开(公告)号：US11296785B2
公开(公告)日：2022-04-05
申请号：US16962013
申请日：2018-02-09
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Roberto Magri , Alberto Deho
IPC分类号： H04B10/077
摘要： There is provided an apparatus for fiber optic line continuity detection. The apparatus comprises an optical input connectable to a first optical fiber of a fiber optic line, an optical output connectable to a second optical fiber of the fiber optic line an optical interface unit configured to transmit and receive optical signals; and an optical switch having a first configuration and a second configuration. In the first configuration the optical switch is configured to pass optical signals received at the optical input to the optical interface unit and to pass optical signals received from the optical interface unit to the optical output. Whereas, in the second configuration the optical switch is configured to pass optical signals received at the optical input to the optical output.

8. 发明授权

US10205553B2 Apparatus for protecting an optical link 有权
公开(公告)号：US10205553B2
公开(公告)日：2019-02-12
申请号：US15746610
申请日：2015-07-27
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Roberto Magri , Alberto Deho
IPC分类号： H04B10/00 , H04J14/02 , H04B10/071 , H04B10/032 , H04Q11/00
摘要： According to the present invention, there is provided apparatus for providing protection of an optical link. The apparatus comprises a first port for coupling to the optical link and a second port for coupling to a further optical link. The apparatus further comprises a third port configured to receive an upstream optical signal to be transmitted over the optical link, and to output a downstream optical signal received over the optical link. The apparatus further comprises protection switching apparatus operable to selectively couple the third port to the first port or to the second port. The apparatus further comprises modifying apparatus configured to modify the upstream optical signal, received at the third port, before it is output from the first port, such that the switching upstream optical signal has a distinctive physical characteristic. The apparatus further comprises detecting apparatus, coupled between the first port and the third port, configured to receive a portion of an incoming optical signal, received at the first port, and to selectively detect the presence of the upstream optical signal or the downstream optical signal in the portion of the incoming signal based on the distinctive physical characteristic. The apparatus further comprises control circuitry configured to provide a control signal to the protection switching apparatus based on an output from the detecting apparatus.

9. 发明申请

US20180212700A1 Apparatus for Protecting an Optical Link 审中-公开
公开(公告)号：US20180212700A1
公开(公告)日：2018-07-26
申请号：US15746610
申请日：2015-07-27
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Roberto Magri , Alberto Deho
IPC分类号： H04J14/02 , H04B10/032 , H04Q11/00
CPC分类号： H04J14/029 , H04B10/032 , H04B10/071 , H04J14/0291 , H04Q11/0005 , H04Q11/0066 , H04Q2011/0009 , H04Q2011/0049 , H04Q2011/0079 , H04Q2011/0081
摘要： According to the present invention, there is provided apparatus for providing protection of an optical link. The apparatus comprises a first port for coupling to the optical link and a second port for coupling to a further optical link. The apparatus further comprises a third port configured to receive an upstream optical signal to be transmitted over the optical link, and to output a downstream optical signal received over the optical link. The apparatus further comprises protection switching apparatus operable to selectively couple the third port to the first port or to the second port. The apparatus further comprises modifying apparatus configured to modify the upstream optical signal, received at the third port, before it is output from the first port, such that the switching upstream optical signal has a distinctive physical characteristic. The apparatus further comprises detecting apparatus, coupled between the first port and the third port, configured to receive a portion of an incoming optical signal, received at the first port, and to selectively detect the presence of the upstream optical signal or the downstream optical signal in the portion of the incoming signal based on the distinctive physical characteristic. The apparatus further comprises control circuitry configured to provide a control signal to the protection switching apparatus based on an output from the detecting apparatus.

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