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公开(公告)号：US10412697B2
公开(公告)日：2019-09-10
申请号：US15794904
申请日：2017-10-26
Applicant: Huawei Technologies Co., Ltd.
Abstract: A time synchronization method and system, and a network device, where the method includes receiving, by a second network device, a first packet from a first network device, where the first packet includes a first service frame and a first time stamp (T1), the first service frame carries a system clock of a radio equipment control (REC), obtaining, the system clock of the REC according to the first packet, sending, according to the system clock of the REC, the first service frame extracted from the first packet to a radio equipment (RE), recording a second time stamp (T2) at which the first service frame is sent, and determining, by the second network device, a transmission delay (T) according to T=T2−T1. Hence, a delay between the REC and the RE remains unchanged.
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公开(公告)号：US12160308B2
公开(公告)日：2024-12-03
申请号：US17840965
申请日：2022-06-15
Applicant: Huawei Technologies Co., Ltd.
Inventor： Jinhui Wang , Cong Chen , Jingfei Lv
IPC: H04J3/06 , H04B10/079
Abstract: A fiber link detection method is implemented by a first network device of an optical communications network. The fiber link detection method includes obtaining a forward delay value indicating a forward delay of transmitting a first Precision Time Protocol (PTP) packet by a second interface of a second network device to a first interface of the first network device over a fiber link. A reverse delay value indicating a reverse delay of transmitting a second PTP packet by the first interface to the second interface over the fiber link is obtained, and a determination is made, based on the forward delay value, the reverse delay value, and a first threshold, that the fiber link comprises a third network device, where the first network device and the second network device support a PTP, and where the third network device does not support the PTP.
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公开(公告)号：US11363187B2
公开(公告)日：2022-06-14
申请号：US17227007
申请日：2021-04-09
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Cong Chen , Chengtao Zhou , Yongyi Wang , Kenji Ishibashi
Abstract: Examples in this application disclose a focusing method and apparatus applied to a terminal device, and the terminal device. One example method includes detecting whether a current frame includes a target object, where the target object is one of preset objects on which focusing needs to be performed. When the current frame includes the target object, a determination is made as to whether the target object is in a motion state. When the target object is in the motion state, tracking focusing is performed by using phase detection PD information with a variable filtering length. When the target object is in a static state, stable focusing is performed by using PD information obtained in an adaptive fixed PD configuration mode.
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公开(公告)号：US20180248721A1
公开(公告)日：2018-08-30
申请号：US15965362
申请日：2018-04-27
Applicant: Huawei Technologies Co., Ltd.
CPC classification number: H04L27/0014 , H04J3/0632 , H04J3/0658 , H04L7/0012 , H04L7/0037 , H04L2027/0048 , H04Q11/0478
Abstract: A clock synchronization method, a receiver, a transmitter, and a clock synchronization system, where the method includes obtaining a common reference clock signal, determining Bt according to the common reference clock signal and Mrd(t−1), where B t = mod [ ∑ n = 0 t - 1 Mr d ( n ) , 2 p ] , determining that Mrd(t−1) is a target Mrd when Ct obtained by means of calculation according to Mrd(t−1) is less than or equal to a threshold, where Ct=Bt−At, At is included in a residual time stamp (RTS) packet received by a receiver last time from the transmitter, and A t = mod [ ∑ n = 0 t M d ( n ) , 2 p ] , performing frequency division on the common reference clock signal using the target Mrd as a frequency dividing coefficient to obtain a first clock signal, and performing frequency multiplication processing on the first clock signal to obtain a service clock signal. Hence, random phase offset may be avoided.
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公开(公告)号：US20180077076A1
公开(公告)日：2018-03-15
申请号：US15818162
申请日：2017-11-20
Applicant: Huawei Technologies Co., Ltd.
IPC: H04L12/875 , H04L12/879 , H04L12/26
CPC classification number: H04L47/56 , G06F5/06 , H04J3/0667 , H04L12/54 , H04L43/0858 , H04L47/22 , H04L47/50 , H04L49/901 , H04W88/085
Abstract: Embodiments of the present invention provide a packet processing method and apparatus. After receiving a packet, a first network device processes the packet, and determines a first latency of the processed packet in a FIFO memory, where: the first latency is equal to a difference obtained by subtracting a second latency from a target latency, the second latency includes a third latency, and the third latency includes a time interval for processing the packet.
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Patent Agency Ranking
公开(公告)号：US10313258B2
公开(公告)日：2019-06-04
申请号：US15818162
申请日：2017-11-20
Applicant: Huawei Technologies Co., Ltd.
IPC: H04L12/875 , H04L12/54 , G06F5/06 , H04L12/26 , H04L12/863 , H04W88/08 , H04L12/815 , H04L12/879 , H04J3/06
Abstract: Embodiments of the present invention provide a packet processing method and apparatus. After receiving a packet, a first network device processes the packet, and determines a first latency of the processed packet in a FIFO memory, where: the first latency is equal to a difference obtained by subtracting a second latency from a target latency, the second latency includes a third latency, and the third latency includes a time interval for processing the packet.
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公开(公告)号：US20180049147A1
公开(公告)日：2018-02-15
申请号：US15794904
申请日：2017-10-26
Applicant: Huawei Technologies Co., Ltd.
CPC classification number: H04W56/0015 , H04J3/0644 , H04J3/0661 , H04J3/0682 , H04W56/00 , H04W72/0406 , H04W88/08 , H04W88/085
Abstract: A time synchronization method and system, and a network device, where the method includes receiving, by a second network device, a first packet from a first network device, where the first packet includes a first service frame and a first time stamp (T1), the first service frame carries a system clock of a radio equipment control (REC), obtaining, the system clock of the REC according to the first packet, sending, according to the system clock of the REC, the first service frame extracted from the first packet to a radio equipment (RE), recording a second time stamp (T2) at which the first service frame is sent, and determining, by the second network device, a transmission delay (T) according to T=T2−T1. Hence, a delay between the REC and the RE remains unchanged.
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公开(公告)号：US20170033863A1
公开(公告)日：2017-02-02
申请号：US15289398
申请日：2016-10-10
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xiaoping Zhou , Jinrong Yin , Cong Chen
IPC: H04B10/071
CPC classification number: H04B10/071 , H04B10/70 , H04B10/80 , H04J14/0282
Abstract: Embodiments disclose an OTDR implementation apparatus. The apparatus includes M transmitters, configured to transmit M optical waves of different wavelengths, where M is greater than or equal to 2. The apparatus also includes a processor, configured to control an OTDR detection circuit to load an OTDR detection signal onto a first transmitter, where the first transmitter is configured to only load the OTDR detection signal, and the other M−1 transmitters are configured to transmit a downlink optical signal, where the downlink optical signal is a high frequency signal. The apparatus also includes the OTDR detection circuit, configured to generate the OTDR detection signal, where the OTDR detection signal is a low frequency signal; and M receivers, where a first receiver is connected to an egress link of the M transmitters, and the other M−1 receivers are connected after a demultiplexer, and are configured to receive multiple uplink signals.
Abstract translation: 实施例公开了一种OTDR实现装置。 该装置包括M个发射机，被配置为发射M个大于或等于2的不同波长的M个波。该装置还包括一个处理器，被配置为控制OTDR检测电路将OTDR检测信号加载到第一发射机 ，其中第一发射机被配置为仅加载OTDR检测信号，并且其他M-1发射机被配置为发送下行链路光信号，其中下行链路光信号是高频信号。 该装置还包括OTDR检测电路，被配置为产生OTDR检测信号，其中OTDR检测信号是低频信号; 和M个接收机，其中第一接收机连接到M个发射机的出口链路，另一个M-1接收机连接在解复用器之后，并被配置为接收多个上行链路信号。
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公开(公告)号：US20230362854A1
公开(公告)日：2023-11-09
申请号：US18336891
申请日：2023-06-16
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yawei Zhang , Jingfei Lyu , Songyan Chen , Cong Chen
CPC classification number: H04W56/0015 , H04J3/0658
Abstract: A method for selecting a clock source includes a first network device that obtains synchronization offset data between the first network device and a second network device through a first port in a clock synchronization failed state. The first network device determines, based on the synchronization offset data, whether to refer to, during clock source selection, clock information received by the first port.
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公开(公告)号：US20230319732A1
公开(公告)日：2023-10-05
申请号：US18330323
申请日：2023-06-06
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Wei Ruan , Jian Yu , Cong Chen , Chenchen Liu , Ming Gan
CPC classification number: H04W52/245 , H04W52/241 , H04W16/28 , H04W52/54
Abstract: In a power control method in a wireless local area network, a beamformer sends a null data packet (NDP) via a plurality of spatial streams to beamformees. After receiving the NDP, a beamformee determines a first parameter for power control based on RSSIs of a plurality of receive antennas when the beamformee receives the NDP, or based on SNRs of a plurality of spatial streams when the beamformee receives the NDP. The beamformee then generates a beamforming report comprising the first parameter, and sends the beamforming report to the beamformer.
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