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公开(公告)号：US09900135B2
公开(公告)日：2018-02-20
申请号：US14910065
申请日：2014-02-21
Applicant: LG ELECTRONICS INC.
Inventor： Kilbom Lee , Jiwon Kang , Hyunsoo Ko , Jaehoon Chung
IPC: H04L5/00 , H04B7/26 , H04B7/0417 , H04B7/0452 , H04B7/06 , H04B7/024 , H04B7/04 , H04B7/0404 , H04B7/08
CPC classification number: H04L5/0048 , G07F9/00 , G07F11/38 , G07F11/50 , H04B7/024 , H04B7/0404 , H04B7/0417 , H04B7/0452 , H04B7/0482 , H04B7/0691 , H04B7/0874 , H04B7/26
Abstract: The base station, receiving first pilot signals transmitted via each of multiple antennas of a user equipment (UE), selects one or more reference codebooks based on channel qualities of the received first pilot signals, and selects one or more sub-channels for each of the reference codebooks. Based on this, the base station determines one or more virtual channels, wherein each of the virtual channels comprises one reference codebook and the one or more sub channels selected for the one reference codebook, wherein the sub-channels are selected to minimum distance between corresponding virtual channel and corresponding reference codebook. And, the base station transmits antenna combining information to the UE, wherein the antenna combining information combines the multiple antennas of the UE into one or more antenna groups corresponding to the one or more virtual channels; and receive second pilot signals transmitted by the UE based on the antenna combining information.
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公开(公告)号：US09894627B2
公开(公告)日：2018-02-13
申请号：US14892430
申请日：2014-05-16
Applicant: LG ELECTRONICS INC.
Inventor： Hyeyoung Choi , Jaehoon Chung , Genebeck Hahn , Ilmu Byun , Jinmin Kim , Heejeong Cho , Eunjong Lee
CPC classification number: H04W56/0015 , H04W36/04 , H04W56/0045
Abstract: The present invention relates to a method for transmitting information for synchronization of a user equipment by a base station in a wireless communication system and apparatus for the same. In one embodiment of the present invention, a source base station transmits a request message requesting uplink synchronization information according to a predetermined reference to a target base station, receives a response message including the synchronization information from the target base station in response to the requested message, and transmits the received synchronization information to one or more user equipments which are to move to a cell serviced by the target base station. The synchronization information is used when the user equipments move to the cell serviced by the target base station without a process of acquiring the synchronization information.
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203.发明授权公开(公告)号：US09888419B2
公开(公告)日：2018-02-06
申请号：US15517821
申请日：2015-10-15
Applicant: LG ELECTRONICS INC.
Inventor： Kukheon Choi , Jaehoon Chung , Genebeck Hahn , Eunjong Lee , Jinmin Kim , Kwangseok Noh
Abstract: The present invention relates to a wireless access system supporting millimeter waves (mmWave) and provides methods for performing fast fallback so as to avoid link disconnections and devices for supporting same. The method whereby a legacy base station supports the fast fallback of a mmWave terminal in a wireless access system supporting millimeter waves (mmWave), according to one embodiment of the present invention, may comprise the steps of: receiving, from the mmWave terminal, a first fallback request message for requesting fast fallback; operating a fallback timer for determining whether or not to perform fallback after receiving the first fallback request message; and determining whether or not a second fallback request message for requesting fast fallback has been received from a mmWave base station within the fallback timer.
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公开(公告)号：US09871566B2
公开(公告)日：2018-01-16
申请号：US14905250
申请日：2014-02-21
Applicant: LG ELECTRONICS INC.
Inventor： Kilbom Lee , Jiwon Kang , Hyunsoo Ko , Jaehoon Chung
IPC: H04B7/0452 , H04B7/04 , H04L5/00 , H04B7/0413
CPC classification number: H04B7/0452 , H04B7/0413 , H04B7/0421 , H04L5/0016 , H04L5/0048
Abstract: Grouping based reference signal transmission scheme for massive MIMO is disclosed. UEs are grouped and each UE group receives information on a sequence used for the uplink reference signal from a base station. The information is determined to assign orthogonal sequences to UEs within a UE group considering at least one or more of a number of orthogonal sequences, a number of the UEs within the UE group, amount of information to be transmitted, channel condition between the base station and each UE, and a number of sequences assigned to each UE of the UEs.
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公开(公告)号：US09866307B2
公开(公告)日：2018-01-09
申请号：US14903251
申请日：2014-07-14
Applicant: LG ELECTRONICS INC.
Inventor： Kitae Kim , Jinmin Kim , Kwangseok Noh , Kukheon Choi , Jaehoon Chung
IPC: H04B7/08 , H04B7/04 , H04L5/00 , H04L5/14 , H04B7/0413
CPC classification number: H04B7/0854 , H04B7/0413 , H04L5/0023 , H04L5/14
Abstract: A method and device for transmitting data symbols using an antenna correlation in a wireless access system supporting multiple input/multiple output (MIMO) operations. The method includes: receiving, from a receiving end, grouping information of a plurality of antennas for supporting the MIMO operations, where the grouping information includes information on the two selected antenna subgroups; selecting two antennas of which a correlation is highest from the two selected antenna subgroups respectively for transmitting the data symbols; and transmitting different data symbols through each of the two selected antennas of the two selected antenna subgroups on an identical time frequency resource. Here, antennas with a highest correlation are grouped into two or more antenna subgroups. Also, two antenna subgroups, of which a correlation is lowest from the two or more antenna subgroups, are selected among the two or more antenna subgroups by the receiving end.
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Patent Agency Ranking
公开(公告)号：US09853704B2
公开(公告)日：2017-12-26
申请号：US14889389
申请日：2014-04-30
Applicant: LG ELECTRONICS INC.
Inventor： Jiwon Kang , Kilbom Lee , Hyunsoo Ko , Jaehoon Chung
IPC: H04B7/06
CPC classification number: H04B7/0617 , H04B7/0619 , H04B7/0621 , H04B7/0626 , H04B7/0639
Abstract: Discloses is a method in which a user equipment (UE) reports channel state information to an evolved Node B (eNB) for beamforming based on multiple antennas in a wireless communication system. Specifically, the method comprises the steps of: receiving information on a plurality of reference signal resources from the eNB; generating channel state information containing information related to one preferred precoder to be applied to the plurality of reference signal resources in common and information related to one linking precoder for connecting the plurality of reference signal resources; and reporting the channel state information to the eNB, wherein the multiple antennas are partitioned into sections of row or column units and the plurality of reference signal resources correspond to the sections.
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公开(公告)号：US09844008B2
公开(公告)日：2017-12-12
申请号：US14893001
申请日：2014-05-23
Applicant: LG ELECTRONICS INC.
Inventor： Eunjong Lee , Hyunsoo Ko , Dongcheol Kim , Hyeyoung Choi , Genebeck Hahn , Heejeong Cho , Jaehoon Chung
CPC classification number: H04W52/365 , H04W52/146 , H04W52/367 , H04W84/12 , H04W88/06
Abstract: A method for a terminal in a first communication system to transmit a power headroom report in a network supporting interworking of a plurality of communication systems comprises a step for transmitting a power headroom report comprising a power headroom value related to a second communication system, when a predetermined triggering condition occurs in a state in which the terminal is accessing the first and second communication systems simultaneously, wherein the power headroom report can comprise information regarding maximum transmission power for the second communication system.
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公开(公告)号：US09838195B2
公开(公告)日：2017-12-05
申请号：US14895902
申请日：2014-05-28
Applicant: LG ELECTRONICS INC.
Inventor： Kitae Kim , Jinmin Kim , Kwangseok Noh , Kukheon Choi , Jaehoon Chung
IPC: H04L5/14 , H04W72/08 , H04W72/04 , H04W24/08 , H04B17/345
CPC classification number: H04L5/1461 , H04B17/345 , H04W24/08 , H04W72/0453 , H04W72/082
Abstract: A method of measuring a self-interference channel in user equipment in a full duplex radio (FDR) communication environment is disclosed. The method includes receiving, from a base station, resource allocation information including information about a time interval, the base station stopping transmission of a signal in the time interval for measurement of the self-interference channel in the user equipment, transmitting a first reference signal for measurement of the self-interference channel in the time interval specified by the resource allocation information, and receiving a second reference signal input to a receiver of the user equipment according to self-interference in the time interval, wherein the second reference signal is a signal corresponding to the first reference signal transmitted over a wireless channel.
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公开(公告)号：US09825687B2
公开(公告)日：2017-11-21
申请号：US15033827
申请日：2014-05-02
Applicant: LG ELECTRONICS INC.
Inventor： Kitae Kim , Jaehoon Chung , Jiwon Kang , Kwangseok Noh , Kukheon Choi , Hyunsoo Ko , Jinmin Kim
CPC classification number: H04B7/0671 , H04B7/0617 , H04B17/12
Abstract: In this disclosure, methods for pre-compensation of the phase shifting error, and apparatuses for the same are disclosed. In one example, a device performs precoding of a digital signal, while acquiring information on an error caused by a phase shifting of the precoding. Then, the device performs phase compensation on the digital signal based on the acquired information. Here, the phase compensation may compensate different amount of phase based on an amount of the phase shifting of the precoding. This phase compensated-digital signal is converted to an analog signal, and is transmitted to a receiver.
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公开(公告)号：US09820133B2
公开(公告)日：2017-11-14
申请号：US14651631
申请日：2013-09-13
Inventor： Eunjong Lee , Genebeck Hahn , Heetae Roh , Jangwon Lee , Jaehoon Chung
CPC classification number: H04W8/005 , H04W4/70 , H04W72/0406 , H04W76/14 , H04W92/18
Abstract: A method and user equipment (UE) for performing device-to-device (D2D) communication in a wireless communication system is disclosed. The method of performing D2D communication by a D2D UE includes informing a mobility management entity (MME) about a first identifier (ID) of a target UE of D2D communication, receiving information regarding a second ID and a D2D peer discovery section, corresponding to the target UE, determining whether D2D communication with the target UE is possible using the received information, requesting the D2D communication with the target UE to the MME when the D2D communication with the target UE is possible, and receiving a D2D link ID allocated to the D2D link with the target UE from a base station (BS) receiving approval of communication of the MME.
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