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公开(公告)号：US10027027B2
公开(公告)日：2018-07-17
申请号：US15064354
申请日：2016-03-08
Applicant: Huawei Technologies Co., Ltd.
Inventor： Bo Gao , Depeng Jin , Dejian Li , Jiamin Chen , Pei Liu
Abstract: The present invention relates to the field of communications technologies, and discloses a beam tracking method, apparatus, and system, so as to ensure rapid discovery and to switch from an optimal link to a backup link in time, or switch from a backup link to an optimal link, thereby effectively improving a throughput of a system link. The beam tracking method includes: transmitting, by a beam tracking initiator, a beam tracking request to a beam tracking responder; receiving, by the beam tracking initiator, an enhanced beam tracking training auxiliary sequence transmitted, according to the enhanced beam tracking request, by the beam tracking responder; and when it is determined according to a reception detection result of the enhanced beam tracking training auxiliary sequence that it is necessary to switch to a backup beam link, transmitting, by the beam tracking initiator, first link switching information to the beam tracking responder.
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公开(公告)号：US09876687B2
公开(公告)日：2018-01-23
申请号：US15055297
申请日：2016-02-26
Applicant: Huawei Technologies Co., Ltd.
Inventor： Pei Liu
Abstract: Embodiments of the disclosure provide a method and an apparatus for selecting a preferred parent node in a wireless sensor network, and the method includes: according to all received DIO messages, separately acquiring, by a first node, node identification information carried in each of the DIO messages and generates a parent node set; selecting, by the first node, a fixed node with a highest performance parameter level as a preferred parent node when it is determined that the parent node set includes at least two fixed nodes; and selecting, by the first node, a mobile node with a highest performance parameter level as the preferred parent node when it is determined that the parent node set does not include a fixed node, and includes at least two mobile nodes.
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公开(公告)号：US09510325B2
公开(公告)日：2016-11-29
申请号：US14874072
申请日：2015-10-02
Inventor： Pei Liu , Jin Shuai , Weixia Zou
CPC classification number: H04W72/02 , H04W24/08 , H04W48/16 , H04W72/0453 , H04W72/1226 , H04W84/18 , Y02D70/00
Abstract: The present invention provides a channel selection method and an apparatus, relates to the field of communications, can improve channel scan and detection efficiency. The method includes: randomly selecting m channels from a preset channel page; determining, from the m channels, a working channel and a spare channel that meet a preset condition; scanning, the working channel of the first superframes and the spare channel of the first superframes in an inactive period of each of the n first superframes according to preset first scan duration, to acquire n energy levels of the working channel and n energy levels of the spare channel; and determining, in an inactive period of the nth first superframe, a working channel for sending a second superframe and a spare channel of the second superframe according to the n energy levels of the working channel and the n energy levels of the spare channel.
Abstract translation: 本发明提供了一种信道选择方法和装置，涉及通信领域，可以提高信道扫描和检测效率。 该方法包括：从预设频道页面随机选择m个频道; 从m个信道确定满足预设条件的工作信道和备用信道; 根据预设的第一扫描持续时间，在n个第一超帧中的每一个的无效时段内扫描第一超帧的工作信道和第一超帧的备用信道，以获取工作信道的n个能级和n个能级 备用通道; 以及在所述第n个第一超帧的无效时段中，根据所述工作信道的n个能级和所述备用信道的n个能级，确定用于发送所述第二超帧的第二超帧和备用信道的工作信道。
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公开(公告)号：US20170264866A1
公开(公告)日：2017-09-14
申请号：US15607238
申请日：2017-05-26
Applicant: Huawei Technologies Co., Ltd.
IPC: H04N7/15 , H04N21/647 , H04N21/6373 , H04N21/234
CPC classification number: H04N7/152 , H04N7/155 , H04N7/181 , H04N21/234 , H04N21/26275 , H04N21/6373 , H04N21/64792
Abstract: A multi-video stream transmission method and a device, where an access point sets an initial sending time and a sending period of an intra frame (I frame) of each station (STA) associated with the access point, and allocates an I frame service period and a predictive frame (P frame) service period to each STA according to the initial sending time and the sending period of the I frame of each STA, where each STA exclusively occupies a channel in the I frame service period and the P frame service period such that I frame sending time of STAs are staggered, network load balance is achieved, and it is ensured that a latency of each STA meets a quality of service (QoS) requirement.
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公开(公告)号：US09532382B2
公开(公告)日：2016-12-27
申请号：US14663986
申请日：2015-03-20
Applicant: Huawei Technologies Co., Ltd.
Inventor： Pei Liu
CPC classification number: H04W74/0816 , H04W4/70 , H04W24/02 , H04W74/08
Abstract: A channel access method and a node are disclosed. The method includes randomly selecting a backoff period XB according to a backoff exponent BE, where XB=X×aUnitBackoffPeriod, and X is an integer randomly selected from 0−(2BE−1); when X is greater than or equal to a predetermined value, determining a middle backoff, where the middle backoff is less than the backoff period, performing a backoff until the middle backoff ends and then performing a CCA; if a channel is clear, performing data transmission, and if the channel is not clear, continuing the backoff until the backoff period ends and then performing a CCA, and executing a channel access operation according to a result of the CCA performed when the backoff period ends. Therefore, data transmission is performed when a channel is clear, which can reduce a data transmission delay.
Abstract translation: 公开了一种信道接入方法和节点。 该方法包括根据退避指数BE随机选择退避周期XB，其中XB = X×aUnitBackoffPeriod，X是从0-（2BE-1）中随机选择的整数; 当X大于或等于预定值时，确定中间退避小于退避周期的中间退避，执行退避直到中间退避结束，然后执行CCA; 如果信道清除，执行数据传输，并且如果信道不清除，则继续退避直到退避周期结束，然后执行CCA，并且根据当退避周期执行的CCA的结果执行信道接入操作 结束。 因此，当信道清除时执行数据传输，这可以减少数据传输延迟。
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Patent Agency Ranking
公开(公告)号：US09461866B2
公开(公告)日：2016-10-04
申请号：US14563799
申请日：2014-12-08
Applicant: Huawei Technologies Co., Ltd. , Tsinghua University
Inventor： Zhenyu Xiao , Changming Zhang , Pei Liu
CPC classification number: H04L27/2602 , H04L27/3863 , H04L43/04 , H04W72/0446 , H04W72/0453
Abstract: Embodiments of the present invention disclose a method, an apparatus and a system for sending a physical layer signal, where the method for sending a physical layer signal includes: constructing a signal frame of a physical layer signal, where the signal frame includes one single-frequency sequence, the single-frequency sequence is used to enable a receiving apparatus to capture the signal frame in a frequency domain according to the single-frequency sequence, and the single-frequency sequence includes a plurality of single-frequency preset symbols; and sending the physical layer signal based on the signal frame. Applying the present invention can facilitate capturing the signal frame in a frequency domain by a receive end, and therefore, not only impact caused by frequency offset is overcome, but also multipath energy may be used effectively to improve performance of capturing.
Abstract translation: 本发明的实施例公开了一种用于发送物理层信号的方法，装置和系统，其中发送物理层信号的方法包括：构建物理层信号的信号帧，其中信号帧包括一个单一的， 单频序列用于使接收装置能够根据单频序列捕获频域中的信号帧，单频序列包括多个单频预设符号; 并根据信号帧发送物理层信号。 应用本发明可以有利于通过接收端在频域中捕获信号帧，因此，不仅克服了由频率偏移引起的影响，而且可以有效地使用多径能量来提高捕获的性能。
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公开(公告)号：US20160165567A1
公开(公告)日：2016-06-09
申请号：US15043741
申请日：2016-02-15
Applicant: Huawei Technologies Co., Ltd.
Inventor： Pei Liu
IPC: H04W64/00 , H04B17/318
CPC classification number: H04W64/00 , H04B17/318
Abstract: Embodiments disclose a method and device for determining a node movement. The method includes: when a first node determines that the first node is currently in an abnormal state, broadcasting at least two RSSI request messages, and receiving signal strength measurement values that are returned by a second node and separately obtained by means of measurement for at least two RSSI request messages in the at least two RSSI request messages broadcast by the first node. The method also includes separately calculating at least two path loss values between the first node and the second node according to the at least two received signal strength measurement values; and determining that the first node moves when it is determined that a quantity of second nodes, of which at least two path loss values are all different, is greater than a set threshold.
Abstract translation: 实施例公开了一种用于确定节点移动的方法和装置。 该方法包括：当第一节点确定第一节点当前处于异常状态时，广播至少两个RSSI请求消息，以及接收由第二节点返回并且通过测量单独获得的信号强度测量值 由所述第一节点广播的所述至少两个RSSI请求消息中的至少两个RSSI请求消息。 该方法还包括根据至少两个接收信号强度测量值分别计算第一节点和第二节点之间的至少两个路径损耗值; 以及当确定其中至少两个路径损耗值全部不同的第二节点的数量大于设定的阈值时，确定所述第一节点移动。
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公开(公告)号：US09154183B2
公开(公告)日：2015-10-06
申请号：US14510773
申请日：2014-10-09
Applicant: Huawei Technologies Co., Ltd.
Inventor： Pei Liu
IPC: H04B1/713 , H04B1/715 , H04B1/7156 , H04L5/00 , H04B1/7143
CPC classification number: H04B1/715 , H04B1/7143 , H04B1/7156 , H04B2001/7154 , H04L5/0012
Abstract: A method can be used for channel mapping based on frequency hopping. A working channel label of a node is computed according to the number of working channels of the node in frequency hopping mode, an identifier of the node, and a time parameter corresponding to a current superframe. A working channel is determined according to the working channel label. Data is transmitted on the working channel within the current superframe.
Abstract translation: 一种方法可用于基于跳频的信道映射。 根据节点在跳频模式下的工作信道数量，节点的标识符和对应于当前超帧的时间参数来计算节点的工作信道标签。 工作频道根据工作频道标签确定。 数据在当前超帧内的工作通道上传输。
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公开(公告)号：US10314064B2
公开(公告)日：2019-06-04
申请号：US15200653
申请日：2016-07-01
Applicant: Huawei Technologies Co., Ltd.
Inventor： Wei Feng , Depeng Jin , Dejian Li , Jiamin Chen , Pei Liu
Abstract: The present invention discloses an apparatus and a method for scheduling a timeslot. The apparatus includes: a first acquiring module, configured to acquire first interference information; a second acquiring module, configured to acquire second interference information; a third acquiring module, configured to acquire timeslot scheduling information of a link of the at least one second BSS, where the timeslot scheduling information is used to indicate information about a scheduled timeslot of the link of the at least one second BSS; and a scheduling module, configured to schedule a timeslot for a link of the first BSS according to the first interference information, the second interference information, and the timeslot scheduling information. According to the apparatus and the method for scheduling a timeslot in embodiments of the present invention, interference to a link of another network can be avoided actively, and a timeslot can be scheduled properly.
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公开(公告)号：US09794099B2
公开(公告)日：2017-10-17
申请号：US15257643
申请日：2016-09-06
Applicant: Huawei Technologies Co., Ltd. , Tsinghua University
Inventor： Zhenyu Xiao , Changming Zhang , Pei Liu
CPC classification number: H04L27/2602 , H04L27/3863 , H04L43/04 , H04W72/0446 , H04W72/0453
Abstract: Embodiments of the present invention disclose a sending apparatus and a receiving apparatus, and a method for sending a physical layer signal, includes: constructing a signal with a frame structure comprising multiple Ga128 sequences, a —Ga128 sequence, and a single-frequency sequence of M in length; wherein the Ga128 and —Ga128 sequences are Golay sequences of 128 in length, M is an integer multiple of 128, and the single-frequency sequence comprises M single-frequency symbols and is used to enable a receiving apparatus to estimate an Inphase and Quadrature (IQ) imbalance parameter; and sending the signal with the frame structure.
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