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公开(公告)号：US20240195472A1
公开(公告)日：2024-06-13
申请号：US18286311
申请日：2021-04-14
发明人： Chenguang Lu , Yezi Huang , Miguel Berg , Niklas Wernersson
IPC分类号： H04B7/06 , H04B7/0417 , H04B7/0452 , H04L5/00
CPC分类号： H04B7/0617 , H04B7/0417 , H04B7/0452 , H04B7/0634 , H04L5/0023
摘要： A method is provided, performed by a Baseband Unit (BBU) for assisting a Radio Unit (RU) to perform beamforming for a communication between a User Equipment (UE) and a base station in a wireless communications network using a multiple antenna system for communication. The BBU and the RU are associated with the base station. The BBU calculates (401) respective Beamforming Weights. BFWs, for at least a subset of subcarriers out of a number of subcarriers. The BBU transforms (402) by a mathematical transformation, the respective calculated BFWs, from frequency domain BFWs to obtain tap-domain BFWs. The BBU select (403) one or more tap-domain BFWs from said obtained tap-domain BFWs. The BBU sends (404) to the RU, the selected one or more the tap-domain BFWs. The selected one or more tap-domain BFWs assists the RU to perform beamforming for the communication between the CE and the base station.
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公开(公告)号：US20230388995A1
公开(公告)日：2023-11-30
申请号：US18033106
申请日：2021-10-22
发明人： Yezi Huang , Lei Bao , Magnus Åström , Boris Dortschy , Behrooz Makki
摘要： Systems and methods are disclosed for Integrated Access and Backhaul (IAB) hierarchical Distributed Unit (DU) resource configuration. In one embodiment, a method performed by an IAB node comprises determining a first multiplexing capability of the IAB node at a first time, sending information that is indicative of the first multiplexing capability of the IAB node to an IAB donor node, and receiving a first resource configuration profile from the IAB donor node. The method further comprises determining a second actual multiplexing capability of the IAB node at a second time that is subsequent to the first time and determining a valid resource configuration for the IAB node based on the second actual multiplexing capability of the IAB node. The method further comprises scheduling transmission on one or more child backhaul links and/or one or more access links of the IAB node based on the valid resource configuration.
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公开(公告)号：US11750273B2
公开(公告)日：2023-09-05
申请号：US17632906
申请日：2020-08-05
发明人： Erik Dahlman , Boris Dortschy , Yezi Huang
CPC分类号： H04B7/15542 , H04W84/047
摘要： A method in a first network node in an IAB network is provided. The method comprises: receiving capability information associated with a second network node, which has a first transceiver and a second transceiver, the capability information being related to an operation of the first transceiver at a first frequency and the second transceiver at a second frequency; configuring one or more resources associated with the first transceiver of the second network node based on the received capability information; and sending an indication of the configured resources to the second network node.
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公开(公告)号：US20220217018A1
公开(公告)日：2022-07-07
申请号：US17608601
申请日：2019-05-03
发明人： Yezi Huang , Miguel Berg , Chenguang Lu
IPC分类号： H04L25/02 , H04B7/06 , H04B17/345
摘要： A distributed base station system comprises a remote radio unit, RRU, and a base band unit, BBU, connected to the RRU over a fronthaul link, the RRU being connected to N antennas. The method comprising by the RRU: obtaining uplink signals as received at the N antennas from a number of User Equipment, UEs, wirelessly connected to the RRU; obtaining a channel estimation matrix of the wireless communication channels; determining an interference covariance estimation matrix based on the obtained channel estimation matrix and on other channel information different from the channel estimation matrix; sending information on the channel estimation matrix and on the interference covariance estimation matrix to the BBU; determining intermediate signals based on the uplink signals, the channel estimation matrix and the interference covariance estimation matrix, and sending the intermediate signals to the BBU.
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公开(公告)号：US11290169B2
公开(公告)日：2022-03-29
申请号：US16765472
申请日：2017-11-20
发明人： Elmar Trojer , Miguel Berg , Yezi Huang , Chenguang Lu
IPC分类号： H04B7/06 , H04B7/024 , H04B7/0456 , H04W88/08
摘要： A method performed by a RRU of a distributed base station system, which further comprising a BBU, connected to the RRU. The RRU is arranged to wirelessly communicate with at least one UE. The method comprises determining a downlink channel estimate from received uplink signals and determining a first part of precoding coefficients to be used for precoding signals to be sent downlink to the at least one UE based on the determined downlink channel estimate. The method further comprises receiving a second part of the precoding coefficients from the BBU, precoding downlink signals of data received from the BBU using the first and the second part of the precoding coefficients and sending the precoded downlink signals to the at least one UE via the plurality of antennas.
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公开(公告)号：US20220015040A1
公开(公告)日：2022-01-13
申请号：US17293175
申请日：2018-12-24
摘要： There is disclosed a method of operating a power-controlled radio node (C, 100) in a radio access network, the power-controlled radio node (C, 100) being in connection with a first Integrated Access and Backhaul, IAB, node (200, N1, N2) via a first communication link and being in connection with a second IAB node (200, N1, N2) via a second communication link, the method comprising transmitting uplink signaling on the first communication link based on power control information pertaining to the second communication link. The disclosure also pertains to related methods and devices.
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7.发明公开公开(公告)号：US20240187061A1
公开(公告)日：2024-06-06
申请号：US18277638
申请日：2021-04-01
发明人： Yezi Huang , Chenguang Lu , Miguel Berg
IPC分类号： H04B7/06 , H04B7/024 , H04B7/0452
CPC分类号： H04B7/0617 , H04B7/024 , H04B7/0452
摘要： Disclosed is a method performed by a first radio unit, RU, of a distributed base station system. The distributed base station system further comprises a Baseband Unit, BBU, connected to the first RU over a fronthaul link and a second RU connected to the first RU over an RU link. The first RU determines first part of beamforming weights that it uses for performing a first part of the beamforming of uplink signals received at its antennas into intermediate signals. The first RU further determines intermediate beamforming weights to be used for a second part of beamforming at the BBU. The first RU further receives, from the second RU, intermediate signals and intermediate beamforming weights determined by the second RU. The first RU combines the intermediate signals and sends them to the BBU. The first RU further combines the intermediate beamforming weights and sends them to the BBU.
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公开(公告)号：US11848739B2
公开(公告)日：2023-12-19
申请号：US17826996
申请日：2022-05-27
发明人： Chenguang Lu , Miguel Berg , Yezi Huang
IPC分类号： H04B7/08 , H04B7/0452 , H04L5/00
CPC分类号： H04B7/0837 , H04B7/0452 , H04L5/0048
摘要： There is provided mechanisms for processing uplink signals. A method is performed by a RRU (200). The method comprises obtaining uplink signals (S102) as received from wireless devices at antenna elements of an antenna array of the RRU (200), each wireless device being associated with its own at least one user layer. The method comprises capturing (S104) energy per user layer by combining the received uplink signals from the antenna array for each user layer into combined signals, resulting in one combined signal per user layer. The combining for each individual user layer is based on channel coefficients of the wireless device associated with said each individual user layer. The method comprises providing (S106) the combined signals to a BBU (300).
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公开(公告)号：US20230337005A1
公开(公告)日：2023-10-19
申请号：US18010301
申请日：2021-07-30
发明人： Yezi Huang , Lei Bao , Magnus Åström , Boris Dortschy , Behrooz Makki
IPC分类号： H04W16/10
CPC分类号： H04W16/10 , H04W88/085
摘要： Embodiments include methods for an integrated access backhaul (IAB) node configured to communicate with first and second parent nodes in a wireless network. Such methods include determining the IAB node's multiplexing capability between a first parent link with the first parent node and a second parent link with the second parent node, and sending an indication of the multiplexing capability to one or more ancestor nodes in the wireless network. Other embodiments include complementary methods for the first parent node and an IAB donor centralized unit (CU) configured to communicate with the IAB node via at least the first parent node. Other embodiments include IAB nodes and IAB donor CUs configured to perform such methods.
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公开(公告)号：US20220256485A1
公开(公告)日：2022-08-11
申请号：US17608229
申请日：2020-04-24
发明人： Boris Dortschy , Erik Dahlman , Yezi Huang , Lei Bao , Behrooz Makki
摘要： In one aspect, a wireless relay node operating in a wireless communications network obtains (602), for each of one or more other wireless relay nodes, information indicating a muting pattern for muting of synchronization signal blocks, SSBs, by the other wireless relay node. The wireless relay node performs (604) measurements of SSBs and muting of SSB transmissions based on the obtained information.
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