公开(公告)号：US11012129B2

公开(公告)日：2021-05-18

申请号：US16466533

申请日：2019-04-29

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Sven Petersson ,  Fredrik Athley ,  Andreas Nilsson ,  Roy Timo ,  Xinlin Zhang

IPC: H04B7/04 ,  H04B7/0456 ,  H04L1/00 ,  H04W52/36

Abstract: There is provided mechanisms for transmission of reference signals. A method is performed by a terminal device. The terminal device comprises at least two physical antenna ports. Each physical antenna port is fed by its own power amplifier. The method comprises transmitting, in only the physical antenna port is fed by the power amplifier configured for highest total output power of all the power amplifiers, as many uplink reference signals as there are physical antenna ports in total.

公开(公告)号：US12191951B2

公开(公告)日：2025-01-07

申请号：US17299088

申请日：2018-12-05

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Niklas Wernersson ,  Maksym Girnyk ,  Roy Timo

IPC: H04B7/06 ,  H04L5/00

Abstract: The present disclosure relates to a method performed by a wireless node (100) for transmitting reference symbols, the node comprising an antenna with a plurality of antenna ports, the method comprising configuring channel state information, CSI, measurements of a user equipment, UE (110), by transmitting a downlink message, transmitting a first reference symbol using the plurality of antenna ports, wherein the first reference symbol is transmitted using a first number N of antenna ports, transmitting a second reference symbol using the plurality of antenna ports, wherein the second reference symbol is transmitted using a second number K of antenna ports, wherein the first reference symbol is transmitted using a first port distance smaller than a second port distance used when transmitting the second reference symbol, and wherein the K used antenna ports are less than the N used antenna ports.

公开(公告)号：US20240283509A1

公开(公告)日：2024-08-22

申请号：US18569006

申请日：2022-06-27

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Roy Timo ,  Mattias Frenne ,  Rakesh Ranjan ,  Xinlin Zhang

IPC: H04B7/06 ,  H04B7/0452 ,  H04W24/02

CPC classification number: H04B7/0626 ,  H04B7/0452 ,  H04B7/0617 ,  H04W24/02

Abstract: Embodiments include methods for a radio access network (RAN) node configured to serve one or more user equipment (UEs). Such methods include transmitting reference signals (RS) for a downlink (DL) channel and receiving, from a UE, a report including encoded feedback representing the DL channel. The encoded feedback comprises a UE DL channel estimate mapped to a channel feature set based on a first mapping that is proprietary to the UE. The channel feature set is compressed based on a second mapping that is known by the UE and the RAN node. Such methods also include, using a decoder function of a neural-network autoencoder (NNAE), decoding the encoded feedback to obtain a reconstruction of the channel feature set. Other embodiments include complementary methods for a UE, as well as RAN nodes and UEs configured to perform such methods.

公开(公告)号：US11770286B2

公开(公告)日：2023-09-26

申请号：US17753737

申请日：2019-09-13

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Roy Timo ,  Miguel Berg ,  Niklas Wernersson ,  Zhao Wang

IPC: H04L27/26 ,  H04B7/08 ,  H04L25/02

CPC classification number: H04L27/2647 ,  H04B7/086 ,  H04L25/0254

Abstract: A method performed by a radio unit for handling a number of received radio signals over an array of antennas comprised in the radio unit. The radio unit transforms the number of received radio signals into a number of sequences of complex symbols. The radio unit further filters the number of sequences of complex symbols by inputting the number of sequences of complex symbols into a trained computational model comprising an alternating sequence of linear and nonlinear functions and thereby obtaining a reduced number of sequences. The radio unit further transmits the reduced number of sequences to a baseband unit over a front-haul link.

公开(公告)号：US20220376749A1

公开(公告)日：2022-11-24

申请号：US17878964

申请日：2022-08-02

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Roy Timo ,  Sebastian Faxér ,  Niklas Wernersson ,  Simon Järmyr

IPC: H04B7/0452 ,  H03M7/30 ,  H04B7/0456 ,  H04L25/49 ,  H04W72/04

Abstract: A network node determines parameters indicating a compression function for compressing downlink channel estimates, and a decompression function. The network node transmits the parameters, receives compressed downlink channel estimates, and decompresses the compressed downlink channel estimates using the decompression function. A terminal device receives the parameters, forms the compression function, compresses downlink channel estimates using the compression function, and transmits the compressed downlink channel estimates. The compression function comprises a first function formed based on at least some of the parameters, a second function which is non-linear, and a quantizer. The first function is configured to receive input data, and to reduce a dimension of the input data. The decompression function comprises a first function configured to receive input data and provide output data in a higher dimensional space than the input data, and a second function which is non-linear.

公开(公告)号：US12068892B2

公开(公告)日：2024-08-20

申请号：US17608926

申请日：2019-05-06

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Zhao Wang ,  Maksym Girnyk ,  Roy Timo ,  Niklas Wernersson ,  Simon Järmyr

IPC: H04L25/03 ,  H04B7/06 ,  H04B17/345 ,  H04L5/00

CPC classification number: H04L25/03343 ,  H04B7/0626 ,  H04B17/345 ,  H04L5/0048

Abstract: Embodiments include methods for operating a network node in a wireless network. Such embodiments include applying non-linear precoding to a first data stream to remove a representation of expected inter-stream interference due to a second data stream, thereby generating a corrected first data stream. Such embodiments also include applying linear precoding to the corrected first data stream and to a first reference signal (RS) stream to generate a first signal layer. The first RS stream is not corrected for the expected inter-stream interference prior to applying the linear precoding. Such embodiments also include transmitting the first signal layer to a user equipment (UE). Other embodiments include complementary methods performed by a UE, as well as network nodes and UEs configured to perform operations corresponding to such methods.

公开(公告)号：US20240275519A1

公开(公告)日：2024-08-15

申请号：US18567397

申请日：2022-06-22

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Roy Timo ,  Rakesh Ranjan ,  Henrik Rydén ,  Xinlin Zhang ,  Mattias Frenne

IPC: H04L1/00 ,  H04B7/06 ,  H04W24/02 ,  H04W24/10

CPC classification number: H04L1/0026 ,  H04B7/0626 ,  H04W24/02 ,  H04W24/10

Abstract: Embodiments include methods for a radio access network (RAN) node. Such methods include transmitting downlink (DL) reference signals (RS) in accordance with one or more configurations and receiving, from each of one or more user equipment (UEs), feedback representing a DL channel from the RAN node to the UE. The feedback is based on the UE's measurements of the transmitted DL RS and is encoded by one or more UE encoders that correspond to respective RAN node decoders. Such methods include, for each of the one or more UEs, obtaining one or more measurements of uplink (UL) RS transmitted by the UE in accordance with the one or more configurations. Such methods include training the RAN node decoder(s) based on the received feedback and the obtained UL RS measurements. Other embodiments include complementary methods for UEs, as well as RAN nodes and UEs configured to perform such methods.

公开(公告)号：US11863271B2

公开(公告)日：2024-01-02

申请号：US18118639

申请日：2023-03-07

Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

Inventor： Sebastian Faxér ,  Roy Timo ,  Niklas Wernersson ,  Maksym Girnyk ,  Zhao Wang

IPC: H04B7/06 ,  H04B7/0456

CPC classification number: H04B7/0626 ,  H04B7/0478

Abstract: The disclosure includes a host operating in a communication system to provide an over-the-top (OTT) service. The host includes processing circuitry configured to initiate transmission of user data to a network node in a cellular network to a user equipment (UE). The network node is configured to receive a CSI report for a downlink channel from a wireless device and transmit the user data from the host to the UE to provide the OTT service based on the CSI report. The CSI report includes a set of reported coefficients; an indication of how the network node is to interpret the set of reported coefficients, wherein the indication of how the network node is to interpret the set of reported coefficients indicates the set of reported coefficients as a subset of a set of candidate reported coefficients; and an indication of a payload size of the set of the reported coefficients.

公开(公告)号：US11728851B2

公开(公告)日：2023-08-15

申请号：US17878964

申请日：2022-08-02

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Roy Timo ,  Sebastian Faxér ,  Niklas Wernersson ,  Simon Järmyr

IPC: H04B7/0452 ,  H03M7/30 ,  H04B7/0456 ,  H04L25/49 ,  H04W72/23

CPC classification number: H04B7/0452 ,  H03M7/3059 ,  H03M7/6047 ,  H04B7/0456 ,  H04L25/4927 ,  H04W72/23

Abstract: A network node determines parameters indicating a compression function for compressing downlink channel estimates, and a decompression function. The network node transmits the parameters, receives compressed downlink channel estimates, and decompresses the compressed downlink channel estimates using the decompression function. A terminal device receives the parameters, forms the compression function, compresses downlink channel estimates using the compression function, and transmits the compressed downlink channel estimates. The compression function comprises a first function formed based on at least some of the parameters, a second function which is non-linear, and a quantizer. The first function is configured to receive input data, and to reduce a dimension of the input data. The decompression function comprises a first function configured to receive input data and provide output data in a higher dimensional space than the input data, and a second function which is non-linear.

公开(公告)号：US11509363B2

公开(公告)日：2022-11-22

申请号：US17435178

申请日：2019-03-06

Applicant: Telefonaktiebolaget LM Ericsson (publ)

Inventor： Roy Timo ,  Sebastian Faxér ,  Niklas Wernersson ,  Simon Järmyr

IPC: H04B7/0452 ,  H03M7/30 ,  H04B7/0456 ,  H04L25/49 ,  H04W72/04

Abstract: A network node (501) determines parameters (503) indicating a compression function for compressing downlink channel estimates, and a decompression function. The network node transmits the parameters, receives compressed downlink channel estimates (504), and decompresses the compressed downlink channel estimates using the decompression function. A terminal device (502) receives the parameters, forms the compression function, compresses downlink channel estimates using the compression function, and transmits the compressed downlink channel estimates. The compression function comprises a first function formed based on at least some of the parameters, a second function which is non-linear, and a quantizer. The first function is configured to receive input data, and to reduce a dimension of the input data. The decompression function comprises a first function configured to receive input data and provide output data in a higher dimensional space than the input data, and a second function which is non-linear.