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公开(公告)号：US10355801B2
公开(公告)日：2019-07-16
申请号：US15685629
申请日：2017-08-24
Applicant: Futurewei Technologies, Inc.
Inventor： Siyu Zhou , Xiang Liu , Frank Effenberger
IPC: H04J3/06 , H04Q11/00 , H04J14/02 , H04B10/077 , H04B10/2575 , H04L27/26 , H04L12/24 , H04L12/713 , H04W88/08
Abstract: Disclosed herein are various embodiments that include a method and a passive optical network (PON) for supporting a mobile network. In various embodiments, a baseband unit (BBU) is configured to measure an optical path delay from each remote radio unit (RRU) of a plurality of RRUs to the BBU during an initialization phase. The BBU synchronizes all the RRUs in the mobile system by adjusting the timing of each path based on the optical path delay between each RRU and the BBU. The BBU determines a mapping rule that maps each resource block assigned to each RRU of the plurality of RRUs to a different PON transport block. The BBU transmits the mapping rule to each RRU of the plurality of RRUs. In certain embodiments, the mapping rule may be recalculated dynamically after the initialization phase.
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2.发明申请公开(公告)号：US20190074905A1
公开(公告)日：2019-03-07
申请号：US16179606
申请日：2018-11-02
Applicant: Futurewei Technologies, Inc.
Inventor： Xiang Liu , Frank Effenberger , Huaiyu Zeng , Shuchang Yao , Lei Zhou , Xianbo Dai , Shengming Ma , Lin Huang
CPC classification number: H04B10/40 , H04B10/272 , H04B10/6971 , H04J14/08 , H04L1/0045 , H04L25/03019
Abstract: A transceiver comprises: a sampling phase optimization stage comprising: a first interpolator; a first equalizer coupled to the first interpolator; a first optimizer coupled to the first equalizer; and an output; and an equalization stage coupled to the output and comprising: a buffer; a second interpolator coupled to the buffer; and a second equalizer coupled to the second interpolator. A method comprising: receiving an optical burst signal; determining an optimum sampling phase based on a portion of a digital signal representing the optical burst signal; and equalizing all of the digital signal using the optimum sampling phase.
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3.发明申请公开(公告)号：US20180316431A1
公开(公告)日：2018-11-01
申请号：US16030568
申请日：2018-07-09
Applicant: Futurewei Technologies, Inc.
Inventor： Xiang Liu , Huaiyu Zeng
CPC classification number: H04B10/25 , H04B1/40 , H04B10/541 , H04B10/5561 , H04B10/60 , H04W88/085
Abstract: A method including receiving, via a frontend of a communication device from a communication link, a cascaded waveform modulation with embedded control signal (CWM-CS); performing time-domain demultiplexing on the CWM-CS to obtain a first waveform modulation signal (W1), a second waveform modulation signal (W2), and a control signal (CS); training a channel equalizer based on the control signal; performing channel equalization on the first waveform modulation signal, the second waveform modulation signal, and the control signal CS; performing time-domain de-multiplexing on the first waveform modulation signal W1, the second waveform modulation signal W2, and the control signal CS; applying a rounding function to the first waveform modulation signal W1; generating a recovered signal (S), by summing the first waveform modulation signal W1 and the second waveform modulation signal W2; recovering data from the recovered signal S; and recovering control information by demodulating the control signal CS.
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公开(公告)号：US20180302183A1
公开(公告)日：2018-10-18
申请号：US15916060
申请日：2018-03-08
Applicant: Futurewei Technologies, Inc.
Inventor： Xiang Liu , Frank Effenberger , Huaiyu Zeng , Guozhu Long , Haixiang Liang
Abstract: An ONU comprises a receiver configured to receive a continuous-mode TDMA downstream signal from an OLT; a PD coupled to the receiver and configured to convert the continuous-mode TDMA downstream signal to an electrical signal or an RF signal; an ADC coupled to the PD and configured to convert the electrical signal or the RF signal to a digital signal; and a burst-mode data recovery stage coupled to the ADC and configured to perform data recovery on a segment of the digital signal corresponding to the ONU, the burst-mode data recovery stage comprises a synchronization stage configured to perform synchronization on the segment.
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公开(公告)号：US20180076914A1
公开(公告)日：2018-03-15
申请号：US15685629
申请日：2017-08-24
Applicant: Futurewei Technologies, Inc.
Inventor： Siyu Zhou , Xiang Liu , Frank Effenberger
CPC classification number: H04J3/0667 , H04B10/077 , H04B10/25753 , H04J3/0652 , H04J3/0682 , H04J14/0267 , H04J14/0272 , H04J14/08 , H04L27/2655 , H04L27/2697 , H04L41/5054 , H04L43/0858 , H04L45/586 , H04Q11/0067 , H04W88/085
Abstract: Disclosed herein are various embodiments that include a method and a passive optical network (PON) for supporting a mobile network. In various embodiments, a baseband unit (BBU) is configured to measure an optical path delay from each remote radio unit (RRU) of a plurality of RRUs to the BBU during an initialization phase. The BBU synchronizes all the RRUs in the mobile system by adjusting the timing of each path based on the optical path delay between each RRU and the BBU. The BBU determines a mapping rule that maps each resource block assigned to each RRU of the plurality of RRUs to a different PON transport block. The BBU transmits the mapping rule to each RRU of the plurality of RRUs. In certain embodiments, the mapping rule may be recalculated dynamically after the initialization phase.
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Patent Agency Ranking
公开(公告)号：US09806813B2
公开(公告)日：2017-10-31
申请号：US14503569
申请日：2014-10-01
Applicant: Futurewei Technologies, Inc.
Inventor： Xiang Liu , Frank Effenberger
IPC: H04B10/60 , H04B10/27 , H04J14/00 , H04B10/2513 , H04B10/61
CPC classification number: H04B10/2513 , H04B10/614 , H04B10/6161
Abstract: An apparatus comprising a frontend configured to convert an optical IM signal associated with a remote optical transmitter into a plurality of analog electrical signals, determine a plurality of DC offsets for the analog electrical signals, remove the DC offsets from the analog electrical signals to produce a plurality of DC-free analog signals, and convert the DC-free analog signals into a plurality of DC-free digital signals, and a DSP unit coupled to the frontend and configured to perform fiber dispersion compensation on the DC-free digital signals according to a dispersion value associated with the remote optical transmitter to produce a plurality of DC-free compensated digital signals, and add the DC offsets to the compensated digital signals to produce a plurality of DC-restored compensated digital signals.
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7.发明申请Sub-Nyquist Sampling for Bandwidth- and Hardware-Efficient Mobile Fronthaul with MIMO Processing 有权带宽和硬件有效移动前缀的子奈奎斯特采样与MIMO处理公开(公告)号：US20170078024A1
公开(公告)日：2017-03-16
申请号：US15262906
申请日：2016-09-12
Applicant: Futurewei Technologies, Inc.
Inventor： Xiang Liu , Lin Cheng , Frank Effenberger
IPC: H04B10/2575 , H04J1/02
CPC classification number: H04B10/25759 , H04B10/2504 , H04B10/25758 , H04B10/27 , H04L5/02
Abstract: A method implemented by a network device in a wireless system is provided. The method includes obtaining a plurality of electronic signals and selecting a first group of signals and a second group of signals from the plurality of electronic signals, generating phase conjugated copies of signals in the first group of signals, and aggregating the phase conjugated copies and a second group of signals into sub-bands in a frequency domain via frequency-domain multiplexing (FDM), wherein the phase conjugated copies are spectrally inverted in the frequency domain. The method may include converting the aggregated electronic signal to an aggregated optical signal, and transmitting the aggregated optical signal over a fiber link.
Abstract translation: 提供了一种由无线系统中的网络设备实现的方法。 该方法包括获得多个电子信号并从多个电子信号中选择第一组信号和第二组信号，产生第一组信号中的信号的相位共轭复本，并且聚合相位共轭拷贝和 第二组信号通过频域复用（FDM）在频域中分成子带，其中相位共轭拷贝在频域中被频谱反转。 该方法可以包括将聚合的电子信号转换成聚合的光信号，以及通过光纤链路传输聚合的光信号。
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公开(公告)号：US10454588B1
公开(公告)日：2019-10-22
申请号：US15966795
申请日：2018-04-30
Applicant: Futurewei Technologies, Inc.
Inventor： Xiang Liu , Huaiyu Zeng , Andy Shen , Frank Effenberger
IPC: H04J14/02 , H04B10/516 , H04L12/28 , H04B10/50
Abstract: An apparatus comprises a DAC configured to convert a digital electrical signal to an analog electrical signal and a laser coupled to the DAC. The laser is configured to generate an optical signal using the analog electrical signal for modulation, the optical signal is a band-multiplexed optical signal comprising frequency bands, the frequency bands comprise a lowest-frequency band, and the lowest-frequency band comprises a baseband IM signal. The laser is configured to transmit the optical signal. A PON comprises an OLT configured to transmit a downstream optical signal, the downstream optical signal is a band-multiplexed optical signal comprising a first band and a second band. The PON includes a first ONU configured to receive the downstream optical signal and equalize only the first band; and a second ONU configured to receive the downstream optical signal and equalize the first band and the second band.
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公开(公告)号：US10142024B2
公开(公告)日：2018-11-27
申请号：US15378362
申请日：2016-12-14
Applicant: Futurewei Technologies, Inc.
Inventor： Shuchang Yao , Lei Zhou , Minghui Tao , Xiang Liu , Frank Effenberger
IPC: H04B10/69 , H04B10/2575 , H04B10/27 , H04B10/524 , H04B10/54 , H04L7/033 , H04L25/03
Abstract: An apparatus comprises: a CDR sub-system comprising: an FFE; a decision component coupled to the FFE; a subtractor coupled to the FFE and the decision component; and a tap weight updater coupled to the subtractor and the FFE; and a PR-MLSE component coupled to the CDR sub-system. A method comprises: converting an optical signal with a first modulation format to an analog electrical signal; converting the analog electrical signal to a first digital signal; equalizing the first digital signal into a second digital signal with a second modulation format, wherein the second modulation format has more levels than the first modulation format; and performing CDR on the second digital signal.
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10.发明申请公开(公告)号：US20180287706A1
公开(公告)日：2018-10-04
申请号：US15477754
申请日：2017-04-03
Applicant: Futurewei Technologies, Inc.
Inventor： Xiang Liu , Frank Effenberger , Huaiyu Zeng , Shuchang Yao , Lei Zhou , Xianbo Dai , Shengming Ma , Lin Huang
CPC classification number: H04B10/40 , H04B10/272 , H04B10/6971 , H04L1/0045 , H04L25/03
Abstract: A transceiver comprises: a sampling phase optimization stage comprising: a first interpolator; a first equalizer coupled to the first interpolator; a first optimizer coupled to the first equalizer; and an output; and an equalization stage coupled to the output and comprising: a buffer; a second interpolator coupled to the buffer; and a second equalizer coupled to the second interpolator. A method comprising: receiving an optical burst signal; determining an optimum sampling phase based on a portion of a digital signal representing the optical burst signal; and equalizing all of the digital signal using the optimum sampling phase.
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