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    Beamforming for random access channel (RACH)
    1.
    发明授权
    Beamforming for random access channel (RACH) 有权

    公开(公告)号：US11909487B2

    公开(公告)日：2024-02-20

    申请号：US17267355

    申请日：2018-08-10

    申请人： Telefonaktiebolaget LM Ericsson (PUBL)

    发明人： Henrik Asplund ,  Arne Simonsson ,  David Astely

    IPC分类号： H04B7/06

    CPC分类号： H04B7/0695 ,  H04W74/0833

    摘要： The present disclosure relates to a method performed by a network node for beamforming, to a network node and to a system including a network node. One aspect of the disclosure provides a method (900) comprising: obtaining (910), at the network node (800), information relating to a plurality of signals received or transmitted using a set of receiving beams or a set of transmitting beams of the network node (800), each individual beam of the set having a unique beam direction; determining a set of candidate beams for use by the network node (800) for synchronisation signal, SS, transmission or random access channel, RACH, detection; based on the obtained information, selecting one or more of the determined candidate beams; and using the selected one or more of the determined candidate beams for SS transmission or RACH detection by the network node (800).

    Method for adapting a beam shape of a beam
    7.
    发明授权
    Method for adapting a beam shape of a beam 有权

    公开(公告)号：US10389424B2

    公开(公告)日：2019-08-20

    申请号：US16066037

    申请日：2016-02-04

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： Niklas Jaldén ,  Henrik Asplund ,  David Astely ,  Martin Johansson

    IPC分类号： H04B7/06 ,  H04B7/024 ,  H04W16/28 ,  H04W24/02

    摘要： A method for adapting a beam shape of a beam in a wireless communication system having multiple nodes is disclosed. Each node is provided with an antenna system configured to provide radio coverage in a cell by a cell specific beam. The method comprises: calculating a transmit weight vector for each user to be served by a given cell based on information of spatial channel characteristics for the user to be served by the given cell and long term interference characteristics estimated based on aggregated information of spatial channel characteristics for users that the given cell should avoid interfering with and that are served by other cells; performing phase normalization of the calculated transmit weight vectors; and aggregating all transmit weight vectors to establish a common transmit weight vector used to form the beam shape for the cell specific beam.

    Determination of a preferred beam in a cellular communication network employing signal BeamForming
    9.
    发明授权
    Determination of a preferred beam in a cellular communication network employing signal BeamForming 有权

    公开(公告)号：US10361764B2

    公开(公告)日：2019-07-23

    申请号：US15753362

    申请日：2015-09-17

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： Andreas Nilsson ,  Henrik Asplund ,  Fredrik Athley ,  Niklas Jaldén

    IPC分类号： H04L5/12 ,  H04B7/06 ,  H04B7/0426 ,  H04W72/04

    摘要： A method for acquiring an indication of a preferred beam of a wireless communication device is disclosed. The method is performed in a network node of a cellular communication network. The network node is adapted to support a plurality of beams of a signal beamforming scheme and to communicate with the wireless communication device using at least one beam of the plurality of beams. The method comprises acquiring a beam power setting of the plurality of beams. The beam power setting comprises a power offset being applied to at least one beam of the plurality of beams, the power offset being relative to a nominal power setting of the plurality of beams. The method also comprises transmitting (to the wireless communication device) a message indicative of the beam power setting, transmitting measurement signals, and receiving (from the wireless communication device) a report indicative of the preferred beam, wherein the preferred beam is determined by the wireless communication device based on the measurement signals and the beam power setting.

    Reduced Gain of an Antenna Beam Pattern
    10.
    发明申请
    Reduced Gain of an Antenna Beam Pattern 审中-公开

    公开(公告)号：US20180026362A1

    公开(公告)日：2018-01-25

    申请号：US15543059

    申请日：2015-01-29

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： Andreas Nilsson ,  Henrik Asplund ,  Martin Johansson ,  Claes Tidestav

    IPC分类号： H01Q3/00 ,  H01Q3/36 ,  H01Q3/26

    CPC分类号： H01Q3/005 ,  H01Q3/2611 ,  H01Q3/36

    摘要： The present disclosure relates to a wireless communication node (1) comprising at least one antenna arrangement (2, 2′, 2″). Each antenna arrangement (2, 2′, 2″) comprises at least one antenna port (3), at least two antenna elements (4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b) arranged for providing an antenna beam pattern (8), and a phase control arrangement (9, 9′, 9″) arranged to receive at least one input signal (10) via said antenna port (3) and to determine a plurality of intermediate signal components (11) from said input signal (10) by determining a first set of respective phase shifts (φ1, φ2, 10 φ3, φ4; θ1, θ2, θ3, θ4, θ5, θ6, θ7, θ8) for said input signal (3). The phase control arrangement (9) is further arranged to determine a final signal component (12) for each antenna element (4a, 4b, 5a, 5b, 6a, 6b, 7a, 7b) from said intermediate signal components (12) by determining a second set of respective phase shifts (β1, β2, β3, β4: Φ1, Φ2, Φ3, Φ4, Φ5, Φ6, Φ7, Φ8) for said intermediate signal components (12), wherein the second set of phase shifts (β1, β2, β3, β4; Φ1, Φ2, Φ3, Φ4, Φ5, Φ6, Φ7, Φ8) is arranged to provide a lowered gain of the antenna arrangement (2, 2′, 2″) in at least one direction (D). The present disclosure also relates to a corresponding method.