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公开(公告)号：US20230126489A1
公开(公告)日：2023-04-27
申请号：US18069812
申请日：2022-12-21
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Kai Xu , Hongwei Wang , Yifan Wang
Abstract: This application provides a communication method and apparatus. The method may include: A cell in a first frequency range determines to enter an energy saving state. A terminal device accesses a cell in a second frequency range through cell selection. When the terminal device needs to enter the cell in the first frequency range, the cell in the second frequency range assists the terminal device in accessing the cell in the first frequency range. In this application, energy saving can be implemented through assistance between a plurality of cells. For example, the cell in the first frequency range may enter the energy saving state. Communication performance can be ensured. For example, the cell in the second frequency range may assist the terminal device in accessing the cell in the first frequency range in the energy saving state.
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公开(公告)号：US11202318B2
公开(公告)日：2021-12-14
申请号：US16078025
申请日：2017-03-23
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Kai Xu , Hongcheng Zhuang
Abstract: Embodiments of the present invention provide an initial access method and apparatus. The method includes: sending, by an access network device, a synchronization signal to user equipment by using at least two downlink beams, where the synchronization signal includes downlink beam indexes of the at least two downlink beams; receiving, by the access network device, a random access preamble sequence sent by the user equipment; and sending, by the access network device, a random access response RAR message to the user equipment by using at least two downlink beams, so that the user equipment completes initial access. In the initial access method provided in the embodiments of the present invention, a disadvantage of channel instability in a high-frequency transmission environment in a new radio system is overcome, to improve initial access performance in the NR system and further improve user experience for the system.
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公开(公告)号：US10986599B2
公开(公告)日：2021-04-20
申请号：US16301405
申请日：2016-05-13
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Lili Zhang , Kai Xu , Xiaocui Li , Nathan Edward Tenny , Bin Liu
Abstract: Embodiments of the present disclosure provide timing advance (TA) obtaining methods and apparatuses. One example method includes generating, by a base station, an indication message and sending the indication message to UE, and receiving, by the UE, the indication message sent by the base station. The UE can then obtain a TA of a second carrier based on the indication message, where the second carrier is a carrier not used to transmit a PUSCH. Although the second carrier is a carrier not used to transmit a PUSCH, the TA of the second carrier can still be obtained.
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公开(公告)号：US10939489B2
公开(公告)日：2021-03-02
申请号：US16308264
申请日：2016-06-08
Applicant: Huawei Technologies Co., Ltd.
Inventor： Lili Zhang , Richard Stirling-Gallacher , Yongbo Zeng , Bin Liu , Kai Xu , Xiaocui Li
Abstract: An interference coordination method includes: determining, by a first cell, first configuration information of the first cell. The first configuration information includes a parameter for transmitting uplink control information UCI by a terminal served by the first cell, the parameter included in the first configuration information is a parameter configured for the first cell and is a parameter orthogonal to a parameter configured for a second cell, and the second cell is a neighboring cell of the first cell; and notifying, by the first cell, the first configuration information to the served terminal.
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公开(公告)号：US10911125B2
公开(公告)日：2021-02-02
申请号：US16461315
申请日：2018-04-12
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yanliang Sun , Kai Xu
IPC: H04B7/06
Abstract: One example method includes receiving, by a terminal, indication information sent by a base station, where the indication information indicates a precoding matrix in a first precoding matrix set and a transmission rank corresponding to the precoding matrix, and the precoding matrix is used to precode transmit data streams at r transmission layers to obtain signals to be sent on N transmission ports of the terminal; and when r>1, a nonscalar part of a precoding matrix whose transmission rank is r in the first precoding matrix set is obtained by combining columns in nonscalar parts of r precoding matrices, and the r precoding matrices are precoding matrices selected from all precoding matrices whose transmission ranks are 1; and determining, by the terminal based on the indication information, the precoding matrix for precoding the transmit data streams.
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Patent Agency Ranking
公开(公告)号：US20190181989A1
公开(公告)日：2019-06-13
申请号：US16323098
申请日：2016-08-03
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xiaocui Li , Kai Xu , Lili Zhang
Abstract: A method for transmitting hybrid automatic repeat request (HARQ) acknowledgement information and a device to provide a manner of performing HARQ feedback in a Licensed Assisted Access-Long Term Evolution (LAA-LTE) system. The method for transmitting HARQ acknowledgement information includes sending, by a network device, first information to user equipment, where the first information indicates a subframe to be used by the user equipment to send the HARQ acknowledgement information to the network device on an unlicensed carrier, and receiving, by the network device in the subframe indicated by the first information, the HARQ acknowledgement information from the user equipment.
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7.发明申请公开(公告)号：US20190052333A1
公开(公告)日：2019-02-14
申请号：US16078386
申请日：2017-03-24
Applicant: Huawei Technologies Co., Ltd.
Inventor： Kai Xu , Yanliang Sun , Bin Liu , Richard Stirling-Gallacher
Abstract: A method for feeding back hybrid channel state information (CSI), a terminal device, and a base station, where the method includes reporting, by a terminal device, CSI to a base station, where the CSI is reported in two stages, CSI used when a quantity of beamformed CSI reference signal (CSI-RS) resources is greater than one is reported in a first stage, and CSI used when the quantity of the beamformed CSI-RS resources is equal to one is reported in a second stage, and reporting the CSI in the two stages occupies one CSI reporting process. In this method, hybrid CSI is reported based on a beamformed CSI-RS. Therefore, CSI reporting overheads can be reduced, and CSI reporting accuracy can be improved such that a cell throughput can be increased.
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公开(公告)号：US20190045528A1
公开(公告)日：2019-02-07
申请号：US16077707
申请日：2016-03-31
Applicant: Huawei Technologies Co., Ltd.
Inventor： Kai Xu , Xiaocui Li
Abstract: A radio communications method, a base station, and a terminal, where the base station sends downlink control information to the terminal, where the downlink control information includes uplink scheduling indication information, and the uplink scheduling indication information instructing the terminal to send uplink data in a plurality of uplink sub frames on at least one unlicensed carrier, such that the terminal sends uplink data in a plurality of uplink subframes on one or more corresponding unlicensed carriers based on the uplink scheduling indication information, thereby implementing scheduling, using uplink scheduling indication information in one piece of downlink control information, of a plurality of uplink subframes to perform uplink transmission. This increases a data volume in data transmission while effectively reducing scheduling signaling overheads.
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9.发明申请公开(公告)号：US20180287754A1
公开(公告)日：2018-10-04
申请号：US15764582
申请日：2015-09-30
Applicant: Huawei Technologies Co., Ltd.
Inventor： Kai Xu , Xiaocui Li
Abstract: Embodiments provide a method and an apparatus for transmitting a channel state information-reference signal (CSI-RS). The method includes: determining, by a base station based on one physical resource block (PRB) pair, a first configuration mode used for a CSI-RS, where a resource element (RE) occupied in the first configuration mode is obtained by aggregating all or a part of resource elements REs occupied in at least two second configuration modes used for the CSI-RS. The first configuration mode is a configuration mode for more than eight CSI-RS ports, and includes a correspondence between each CSI-RS port and a resource element RE. The second configuration mode is a configuration mode for eight CSI-RS ports, and comprises a correspondence between each CSI-RS port and a resource element RE. The method also includes transmitting, by the base station, the CSI-RS to user equipment using the first configuration mode.
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公开(公告)号：US20180070375A1
公开(公告)日：2018-03-08
申请号：US15561583
申请日：2015-06-29
Applicant: Huawei Technologies Co., Ltd.
Inventor： Kai Xu , Xiaocui Li
CPC classification number: H04W72/1273 , H04L5/001 , H04L5/0048 , H04L5/0091 , H04L27/0006 , H04W72/042 , H04W72/0446
Abstract: A method for transmitting a channel state information reference signal (CSI-RS), includes obtaining, by a first device, an unlicensed carrier. The method also includes determining, by the first device, a target CSI-RS from M pre-configured groups of CSI-RSs, where each group of CSI-RSs in the M groups of CSI-RSs are periodically sent in a time domain, different groups of CSI-RSs in the M groups of CSI-RSs have different sending periods and/or offsets, and M is an integer greater than 1. Additionally, the method includes sending, by the first device, the target CSI-RS to a second device based on the unlicensed carrier at a start sending moment of the target CSI-RS.
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