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11.发明申请公开(公告)号：US20190260581A1
公开(公告)日：2019-08-22
申请号：US16402525
申请日：2019-05-03
Applicant: Huawei Technologies Co., Ltd.
Inventor： Changzheng Su , Liangliang Lu , Su Hu , Xianlong Luo
IPC: H04L9/08
Abstract: Embodiments of this application relate to the field of communications technologies. The embodiments of this application are applicable to a centralized management and control network. A centralized controller obtains Z service requests, globally determines, based on an identifier of a source service node and an identifier of a destination service node that are corresponding to each of the Z service requests, a quantum key consumption parameter, and topology information of key nodes in the centralized management and control network, globally optimal key relay instructions corresponding to G service requests, and further delivers the key relay instructions corresponding to the G service requests to key nodes corresponding to the key relay instructions, so that the key nodes perform quantum key relay based on the key relay instructions, to generate a shared quantum key between the source key node and the destination key node.
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公开(公告)号：US20180367301A1
公开(公告)日：2018-12-20
申请号：US16116171
申请日：2018-08-29
Applicant: Huawei Technologies Co., Ltd.
Inventor： Changzheng Su
IPC: H04L9/08 , H04J14/06 , H04B10/532 , H04B10/80 , H04B10/61
Abstract: In the embodiments of the present invention, a transmit optical signal includes a reference optical signal and a quantum optical signal, optical splitting processing and coherent coupling are performed on the transmit optical signal by using a local oscillator optical signal to obtain at least two coherently coupled optical signals, and then optical-to-electrical conversion and amplification are separately performed on a first coherently coupled optical signal that includes the reference optical signal and a second coherently coupled optical signal that includes the quantum optical signal, to obtain a first electrical signal and a second electrical signal. Then, phase frequency information between the local oscillator optical signal and the reference optical signal is obtained from the first electrical signal, and an original key is recovered from the second electrical signal based on the phase frequency information.
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公开(公告)号：US11595196B2
公开(公告)日：2023-02-28
申请号：US17069317
申请日：2020-10-13
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Zhengyu Li , Changzheng Su , Su Hu , Yang Zou
Abstract: This application provide quantum key distribution methods, devices, and storage media. In an implementation, a method comprises: determining, based on a first mapping, a first quantum key of N first quantum keys corresponding to an ith node on a target routing path; determining, based on a second mapping, a second quantum key of N second quantum keys corresponding to the ith node; and generating, by the ith node based on the first quantum key corresponding to the ith node and the second quantum key corresponding to the ith node, a third quantum key corresponding to the ith node on the target routing path.
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公开(公告)号：US11444758B2
公开(公告)日：2022-09-13
申请号：US16868789
申请日：2020-05-07
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zhengyu Li , Changzheng Su , Yang Zou , Yongjing Cai
IPC: H04L9/08 , G02B27/28 , H03M1/12 , H04B10/556 , H04B10/64
Abstract: A key generation method includes modulating a first key to a first light source signal, to obtain a modulated optical signal, splitting the modulated optical signal, to obtain a first sub modulated optical signal and a second sub modulated optical signal, attenuating the first sub modulated optical signal such that a quantity of photons included in each period of the first sub modulated optical signal is less than a preset value, and sending an attenuated first sub modulated optical signal to a receive-end device, and obtaining a second key carried in the second sub modulated optical signal, and storing the second key.
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公开(公告)号：US11329810B2
公开(公告)日：2022-05-10
申请号：US16817125
申请日：2020-03-12
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Zhengyu Li , Changzheng Su
IPC: H04L9/08 , H04B10/516 , H04B10/70
Abstract: This application discloses a continuous-variable quantum key distribution (CV-QKD) device and method. The device includes a light source, a modulation unit, a first random number generator, and a processor, where the processor is configured to obtain a first data sequence based on a preset quantity of modulation format symbols, a distribution probability of each symbol, and a first random number sequence generated by the first random number generator, and obtain a second data sequence based on the first data sequence; and the modulation unit is configured to modulate, based on to the first data sequence, a signal emitted by the light source to output a second optical signal, where the second optical signal does not need to include quantum states with a quantity in an order of magnitude of 28×28 required in an existing Gaussian protocol.
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Patent Agency Ranking
公开(公告)号：US11327233B2
公开(公告)日：2022-05-10
申请号：US16364512
申请日：2019-03-26
Applicant: Huawei Technologies Co., Ltd.
Inventor： Wenye Liang , Changzheng Su , Xinhua Xiao , Zhifang Fang
Abstract: The present invention discloses an encoding apparatus, including: a polarization splitter-rotator PSR, a polarization rotation structure, and a modulator, where the PSR is configured to receive an input signal light, split the input signal light into two parts whose polarization modes are the same, and send the two parts to the polarization rotation structure and the modulator respectively; the polarization rotation structure has functions of rotating, by 180 degrees, a polarization direction of an optical signal entering the polarization rotation structure from one end, and keeping a polarization direction of an optical signal entering the polarization rotation structure from the other end unchanged; the modulator is configured to modulate a light input to the modulator; and the PSR is further configured to receive signal lights sent by the polarization rotation structure and the modulator, combine the two signal lights to send the output signal light.
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公开(公告)号：US20210327605A1
公开(公告)日：2021-10-21
申请号：US17359909
申请日：2021-06-28
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yangchao Shen , Zhengyu Li , Changzheng Su
Abstract: An ion trap system includes a laser adjustment and control module configured to split a light beam into P first light beams and Q second light beams. N first light beams in the P first light beams are transmitted to N ions, respectively, and tM second light beams in the Q second light beams are transmitted to M monitoring units, respectively. The M monitoring units are configured to monitor the M second light beams, respectively, and obtain spatial information of the M second light beams. The system further includes a feedback control module configured to receive the spatial intensity distribution information of the M second light beams, determine N first control signals based on the spatial information of the M second light beams, and transmit the N first control signals to the laser adjustment and control module.
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公开(公告)号：US10574364B2
公开(公告)日：2020-02-25
申请号：US16139307
申请日：2018-09-24
Applicant: Huawei Technologies Co., Ltd.
Inventor： Changzheng Su , Yang Zou
Abstract: Embodiments of this application disclose a quantum signal detection method and a quantum signal detection apparatus. The method includes: splitting a received optical pulse sequence into a first pulse sequence and a second pulse sequence that are in orthogonal polarization, where the signal pulses are quantum signal pulses; obtaining information about the reference pulses; generating local oscillator light; splitting the local oscillator light into first local oscillator light and second local oscillator light whose intensities are the same and that are in orthogonal polarization; performing homodyne detection on the first pulse sequence and the first local oscillator light, and performing homodyne detection on the second pulse sequence and the second local oscillator light, to obtain homodyne detection results; and obtaining regular components of the signal pulses in the optical pulse sequence according to the homodyne detection results and the information about the reference pulses.
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公开(公告)号：US20190222416A1
公开(公告)日：2019-07-18
申请号：US16364512
申请日：2019-03-26
Applicant: Huawei Technologies Co., Ltd.
Inventor： Wenye Liang , Changzheng Su , Xinhua Xiao , Zhifang Fang
CPC classification number: H04L9/0858 , G02B6/2746 , G02F1/093 , H04B10/70 , H04L9/08
Abstract: The present invention discloses an encoding apparatus, including: a polarization splitter-rotator PSR, a polarization rotation structure, and a modulator, where the PSR is configured to receive an input signal light, split the input signal light into two parts whose polarization modes are the same, and send the two parts to the polarization rotation structure and the modulator respectively; the polarization rotation structure has functions of rotating, by 180 degrees, a polarization direction of an optical signal entering the polarization rotation structure from one end, and keeping a polarization direction of an optical signal entering the polarization rotation structure from the other end unchanged; the modulator is configured to modulate a light input to the modulator; and the PSR is further configured to receive signal lights sent by the polarization rotation structure and the modulator, combine the two signal lights to send the output signal light.
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公开(公告)号：US20190109651A1
公开(公告)日：2019-04-11
申请号：US16206452
申请日：2018-11-30
Applicant: Huawei Technologies Co., Ltd.
Inventor： Changzheng Su , Liangliang Lu
IPC: H04B10/70 , H04B10/50 , H04B10/2537
Abstract: In the embodiments of the present disclosure, a transmit apparatus generates a to-be-processed optical signal and a quantum optical signal, where the to-be-processed optical signal includes at least a classical optical signal; and the transmit apparatus couples the to-be-processed optical signal and the quantum optical signal, to obtain a coupled optical signal, and sends the coupled optical signal. Because a wavelength of the classical optical signal is in an L band and/or a C band and a wavelength of the quantum optical signal is in an S band, a wavelength in the band of the classical optical signal is greater than a wavelength in the band of the quantum optical signal.
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