公开(公告)号：WO2017032406A1

公开(公告)日：2017-03-02

申请号：PCT/EP2015/069379

申请日：2015-08-24

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： BRUNO, Gianmarco ,  NIJHOF, Jeroen ,  GIORGI, Luca ,  PONZINI, Filippo

IPC: H04B10/079 ,  H04B10/2575

CPC classification number: H04B10/0793 ,  H04B10/07953 ,  H04B10/25753

Abstract: A radio over fibre system (5) comprises a base station (10, 20) with a first base station node (10) and a second base station node (20) connected by an optical communication link (30). At least one of the base station nodes (10, 20) comprises an optical transmitter (17, 23). A method of determining an operating parameter for the optical transmitter (17, 23) comprises receiving signal quality parameters for a plurality of user equipments (UE) served by the base station (10, 20). The method determines an operating parameter of the optical transmitter using the determined signal quality parameters of the plurality of user equipments (UE). The operating parameter of the optical transmitter can be a modulation parameter.

Abstract translation: 光纤无线电系统（5）包括具有第一基站节点（10）的基站（10,20）和通过光通信链路（30）连接的第二基站节点（20）。 所述基站节点（10,20）中的至少一个包括光发射机（17,23）。 确定光发射机（17,23）的操作参数的方法包括：接收由基站（10,20）服务的多个用户设备（UE）的信号质量参数。 该方法使用所确定的多个用户设备（UE）的信号质量参数确定光发射机的操作参数。 光发射机的工作参数可以是调制参数。

公开(公告)号：WO2016086958A1

公开(公告)日：2016-06-09

申请号：PCT/EP2014/076134

申请日：2014-12-01

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： GIORGI, Luca ,  PONZINI, Filippo ,  CAVALIERE, Fabio ,  TROJER, Elmar

IPC: H04B10/2575 ,  H04W88/08

CPC classification number: H04B10/25752 ,  H04W56/001

Abstract: A wireless communications network radio unit (10) comprising: an input (12) arranged to receive a radio over fibre, RoF, input optical signal (14) carrying digital radio communications traffic for transmission from a plurality of antenna elements, synchronisation traffic and control and management traffic; a digital receiver (16) arranged to receive and terminate the RoF input optical signal to obtain the digital radio communications traffic; a framer (18) arranged to frame the digital radio communications traffic into at least one digital traffic stream consisting of the digital radio communications traffic for transmission from a plurality of the antenna elements and clock recovery information; and at least one optical transmitter (20) arranged to generate an RoF output optical signal (22) carrying the digital traffic stream.

Abstract translation: 一种无线通信网络无线电单元（10），包括：输入端（12），被配置为接收光纤上的无线电，RoF，承载用于从多个天线元件传输的数字无线电通信业务的输入光信号（14），同步业务和控制 和管理流量; 数字接收器（16），被布置为接收和终止所述RoF输入光信号以获得所述数字无线电通信业务; 成帧器（18），被布置成将数字无线电通信业务成帧为由数字无线电通信业务组成的至少一个数字业务流，用于从多个天线单元传输数据;以及时钟恢复信息; 以及至少一个光发送器（20），被布置成产生承载数字业务流的RoF输出光信号（22）。

公开(公告)号：WO2011066858A1

公开(公告)日：2011-06-09

申请号：PCT/EP2009/066310

申请日：2009-12-03

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (publ) ,  CAVALIERE, Fabio ,  GIORGI, Luca ,  GROSSO, Renato ,  CIARAMELLA, Ernesto

Inventor： CAVALIERE, Fabio ,  GIORGI, Luca ,  GROSSO, Renato ,  CIARAMELLA, Ernesto

IPC: H04J14/02 ,  H04B10/08

CPC classification number: H04J14/0227 ,  H04B10/071 ,  H04J14/0226 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0257 ,  H04J14/0265 ,  H04J14/0282

Abstract: An optical network (1) comprising an optical network element (10) comprising a first optical transmitter (14), a first controller (16), a first optical receiver and a second optical receiver and a second optical network element (12). There is provided a transmission path (30) between said first optical network element and said second optical network element. Said first optical transmitter is arranged to generate and transmit a first optical signal. Said first controller is arranged to control said first optical transmitter to generate and transmit said first optical signal at a wavelength selected from a predetermined plurality of wavelengths. Said first optical receiver is arranged to detect a backscatter portion of said first optical signal returned to said first optical network element along said transmission path by distributing scattering.

Abstract translation: 一种包括光网络元件（10）的光网络（1），包括第一光发射器（14），第一控制器（16），第一光接收器和第二光接收器以及第二光网络元件（12）。 在所述第一光网络元件和所述第二光网络元件之间提供传输路径（30）。 所述第一光发射器被布置成产生和发射第一光信号。 所述第一控制器被布置为控制所述第一光发射机以从预定的多个波长选择的波长产生和发射所述第一光信号。 所述第一光接收器被布置为通过分布散射来检测沿着所述传输路径返回到所述第一光网络元件的所述第一光信号的后向散射部分。

公开(公告)号：WO2021213637A1

公开(公告)日：2021-10-28

申请号：PCT/EP2020/061100

申请日：2020-04-21

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： CAVALIERE, Fabio ,  GIORGI, Luca ,  POTI, Luca

IPC: H04B10/61

Abstract: An optical receiver (100) comprising: a polarisation controller (102) arranged to receive as its input a first modulated optical signal having a first polarisation and an unmodulated optical carrier signal polarisation aligned with the first modulated optical signal, the first modulated optical signal having negligible spectral power density within a predetermined bandwidth, BW, around an optical spectrum of the unmodulated optical carrier signal; optical filter apparatus (104) having a main polarisation mode; and coherent optical receiver apparatus (106), wherein the polarisation controller is arranged to apply polarisation rotations to the first modulated optical signal and the unmodulated optical carrier signal such that their polarisation is aligned to the main polarisation mode of the optical filter apparatus, the optical filter apparatus is arranged to receive and separate the unmodulated optical carrier signal from the first modulated optical signal, and the coherent optical receiver apparatus is arranged to receive said separated signals and perform coherent detection of the first modulated optical signal using as a local oscillator, LO, signal the unmodulated optical carrier signal.

公开(公告)号：WO2016173672A1

公开(公告)日：2016-11-03

申请号：PCT/EP2015/059574

申请日：2015-04-30

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： PONZINI, Filippo ,  DORTSCHY, Boris ,  URBAN, Patryk ,  GIORGI, Luca

IPC: H04B10/2575 ,  H04B10/60

CPC classification number: H04B10/25753 ,  H04B10/25758 ,  H04B10/60 ,  H04J14/0298

Abstract: An optical receiver (10) comprising: an input (12) arranged to receive a subcarrier multiplexing, SCM, optical signal (14) comprising an optical carrier and an optical subcarrier, each having a respective optical power; a carrier suppression element, CSE,(16) arranged to receive the SCM optical signal and having a rejection band that is tuneable in frequency to partially suppress the optical carrier by a variable amount; an optical amplifier (18) having a variable gain and arranged to receive the SCM optical signal from the CSEand amplify the optical carrier and the optical subcarrier; a photoreceiver (20) arranged to receive the SCM optical signal from the amplifier; and a controller (24) arranged to cause frequency tuning of the rejection band and variation of the gain of the optical amplifier to adjust a ratio of the optical power of the optical carrier at the photoreceiver to the optical power of the optical subcarrier at the photoreceiver based on an indication of performance of the SCM optical signal.

Abstract translation: 一种光接收器（10），包括：输入端（12），被配置为接收包括光载波和光副载波的子载波复用，SCM，光信号（14），每个具有相应的光功率; 载波抑制元件CSE（16），被布置为接收SCM光信号并具有可频率调制的抑制带，以将光载波部分地抑制可变量; 具有可变增益并被布置成从CSE接收SCM光信号的光放大器（18），并放大光载波和光副载波; 光接收器（20），布置成从放大器接收SCM光信号; 以及控制器（24），其被布置成使得所述抑制频带的频率调谐和所述光放大器的增益的变化，以调节所述光接收器处的光载波的光功率与所述光接收器处的光副载波的光功率的比率 基于SCM光信号的性能指示。

公开(公告)号：WO2016173616A1

公开(公告)日：2016-11-03

申请号：PCT/EP2015/059100

申请日：2015-04-27

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： PONZINI, Filippo ,  GIORGI, Luca ,  CAVALIERE, Fabio

IPC: H04L5/02 ,  H04L27/34

CPC classification number: H04L5/023 ,  H04J14/02 ,  H04L27/34

Abstract: A method in a node of a telecommunication network comprises receiving a digital communication signal from a first signal source, wherein the digital communication signal comprises a plurality of low amplitude windows, step (101), and receiving one or more analog subcarrier signals from a second signal source, step (103). The method further comprises multiplexing the one or more analog subcarrier signals into one or more of the plurality of low amplitude windows of the digital communication signal, step (105).

Abstract translation: 电信网络的节点中的方法包括从第一信号源接收数字通信信号，其中所述数字通信信号包括多个低幅度窗口，步骤（101），以及从第二信号源接收一个或多个模拟子载波信号 信号源，步骤（103）。 该方法还包括将一个或多个模拟副载波信号复用成数字通信信号的多个低幅度窗口中的一个或多个，步骤（105）。

公开(公告)号：WO2023006211A1

公开(公告)日：2023-02-02

申请号：PCT/EP2021/071356

申请日：2021-07-29

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： GIORGI, Luca ,  CAVALIERE, Fabio ,  IOVANNA, Paola

IPC: H04J14/02 ,  H04B10/032

Abstract: Embodiments described herein relate methods and apparatuses for dealing with upstream and downstream signals in a Broadcast-and-Select, B&S, node. A first B&S node comprises a first downstream port coupled to a first downstream power splitter/combiner, a second downstream port coupled to a second downstream power splitter/combiner, and a third downstream port coupled to a third downstream power splitter/combiner. The first downstream power splitter/combiner is configured to split a total power of a first downstream optical signal received at the first downstream port to form a first version and a second version of the first downstream optical signal, the second power splitter/combiner is configured to: receive the first version of the first downstream optical signal, and transmit the first version of the first downstream optical signal to a first network node via the second downstream port, the third downstream power splitter/combiner is configured to: receive the second version of the first downstream optical signal, and transmit the second version of the first downstream optical signal to a second network node via the third port.

公开(公告)号：WO2022258132A1

公开(公告)日：2022-12-15

申请号：PCT/EP2021/065109

申请日：2021-06-07

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： GIORGI, Luca ,  CAVALIERE, Fabio ,  IOVANNA, Paola ,  THYNI, Tomas

IPC: H04Q11/00 ,  H04J14/02

Abstract: An optical network unit, ONU, (100) for a passive optical network, PON. The ONU comprises a tunable receiver (110) having a wavelength tunable operating wavelength, a tunable transmitter (120) having a wavelength tunable operating wavelength and a controller (130) comprising at least one processor and memory. The memory contains instructions which when executed by the at least one processor cause the ONU to perform operations of: - if the tunable transmitter is on, switching the tunable transmitter off and if the tunable receiver is off, switching the tunable receiver on; - determining an availability of a control channel; - receiving a downstream control channel signal at a downstream control channel wavelength from a central office, CO, node of the PON, the downstream control channel signal carrying an indication of allocated operating wavelengths for the ONU; - setting an operating wavelength of the tunable receiver to an allocated operating wavelength and setting the operating wavelength of the tunable transmitter to an allocated operating wavelength; and - switching the tunable transmitter on.

公开(公告)号：WO2021229265A1

公开(公告)日：2021-11-18

申请号：PCT/IB2020/054494

申请日：2020-05-12

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) ,  PLANT, David V.

Inventor： BRUNNER, Robert ,  CATUOGNO, Tommaso ,  GIORGI, Luca ,  GUTIERREZ CASTREJON, Ramon ,  MD GHULAM, Saber

IPC: H04L25/49 ,  H04B10/66 ,  H04B10/69 ,  H04B10/54 ,  H04B10/541 ,  H04B10/695 ,  H04L25/4917

Abstract: Methods in an optical receiver, for decoding a received M-level pulse- amplitude-modulated, PAM-M, optical signal. An example method comprises, for a first interval, decoding (510) the received PAM-M optical signal using a standard PAM-M decoder with M-l thresholds, using first sampling times, to obtain a first set of decoded bits, and decoding (520) the received PAM-M optical signal using a duobinary decoder with 2M-2 thresholds, at second sampling times offset from the first sampling times, to obtain a second set of decoded bits. The method further comprises calculating (530) first and second error metrics corresponding to the first and second sets of decoded bits, respectively, and selecting (540) the standard PAM-M decoder or the duobinary decoder for subsequent decoding of the received PAM-M optical signal, based on the first and second error metrics.

公开(公告)号：WO2019185139A1

公开(公告)日：2019-10-03

申请号：PCT/EP2018/057949

申请日：2018-03-28

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： GIORGI, Luca ,  D'ERRICO, Antonio ,  BOTTARI, Giulio

IPC: H04J14/02

Abstract: In one example aspect, an optical network node is configured to operate in a first mode and a second mode. The node comprises a first optical routing apparatus configured to direct a first optical signal received from an optical network at a first port to an input of a first optical switching device in the first mode, and to direct an optical signal output from the first optical switching device to the first port in the second mode. The node also comprises a second optical routing apparatus configured to direct the output signal from the first optical switching device to a second port in the first mode, and to direct a second optical signal received from a network at the second port to the input of the first optical switching device in the second mode. The node is configured to transition from the first mode to the second mode upon determining that the first optical signal is not being received at the first port or on detection of a third optical signal received at a third port.