公开(公告)号：US20230040739A1

公开(公告)日：2023-02-09

申请号：US17786070

申请日：2020-01-14

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Nuan SONG

IPC: H04B7/0456

Abstract: Embodiments of the present disclosure relate to methods, devices and computer readable storage media of communication. A network device transmits, to a terminal device, channel state information reference signals associated with first number of ports at the network device; receives, from the terminal device, compressed channel state information generated based on capability of the terminal device; and recoveries, from the compressed channel state information, channel state information associated with second number of ports at the network device, the second number of ports being not less than the first number of ports. The terminal device receives, from the network device, the channel state information reference signals associated with the first number of ports at the network device; determines channel state information based on the channel state information reference signals; compresses the channel state information based on capability of the terminal device; and transmits the compressed channel state information to the network device for recovery of the channel state information associated with the second number of ports. As such, CSI can be acquired more accurately with reduced complexity and overhead.

公开(公告)号：US20230239105A1

公开(公告)日：2023-07-27

申请号：US18000410

申请日：2020-06-08

Applicant: Nokia Technologies Oy

Inventor： Nuan SONG

IPC: H04L5/00

CPC classification number: H04L5/0051 ,  H04L5/0064

Abstract: Example embodiments of the present disclosure relate to applying uplink channel information to determine data processing model deployed for downlink use. According to embodiments, a solution for channel information reporting for applying uplink channel information to determine data processing model deployed for downlink use has been proposed. A data processing model is determined using uplink dataset (for example, uplink reference signal), then the data processing model is used to process downlink CSI. In this way, compared with high-resolution CSI feedback for training, it is more accurate and does not require extra CSI feedback, which significantly reduces the overhead. It also alleviates implementation efforts on the terminal device side, since no complicated CSI processing is required.

公开(公告)号：US20210067215A1

公开(公告)日：2021-03-04

申请号：US16961572

申请日：2018-01-18

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Nuan SONG ,  Eugene VISOTSKY ,  Frederick VOOK ,  Mihai ENESCU

IPC: H04B7/0456 ,  H04B7/06 ,  H04L5/00 ,  H04B7/0452

Abstract: Systems, methods, apparatuses, and computer program products for non-linear precoding are provided. One method may include combining, by a network node, of linear and non-linear precoding, for example based on specific channel state information acquisition from at least one user equipment, and generating two types of demodulation reference signals for the concatenated linear and non-linear precoding. The method may include multiplexing, by the network node, the two types of demodulation reference signals with data. A first of the two types of demodulation reference signals may be linearly precoded with one linear precoding matrix from a first-stage linear precoder, and another one of the two types may be linearly precoded with both the first-stage linear precoder and a feedforward filter in a second-stage non-linear precoder from the concatenation of linear and nonlinear precoders.

公开(公告)号：US20240195465A1

公开(公告)日：2024-06-13

申请号：US18551380

申请日：2021-03-22

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Zhihang LI ,  Tao YANG ,  Nuan SONG

IPC: H04B7/0456 ,  H04B7/0452

CPC classification number: H04B7/0456 ,  H04B7/0452

Abstract: Embodiments of the present disclosure relate to hybrid beamforming. A plurality of time delay elements is used to perform analog beamforming. Each time delay element is configured to apply the same time delay at different frequencies. The plurality of time delay elements is coupled to at least one RF chain to receive signals. Each antenna in an antenna array is configured to be selectively connected to one of the plurality of time delay elements based on a target configuration of a connection between the plurality of time delay elements and the antenna array. In operation, the target configuration is determined based on time delay information concerning the plurality of time delay elements and channel information concerning a physical channel over which the signals are to be transmitted.

公开(公告)号：US20230216597A1

公开(公告)日：2023-07-06

申请号：US18000416

申请日：2020-12-01

Applicant: Nokia Technologies Oy

Inventor： Nuan SONG ,  Tao YANG

IPC: H04B17/391 ,  H04L5/00

CPC classification number: H04B17/391 ,  H04L5/0051

Abstract: Example embodiments of the present disclosure relate to compensating reference signals to train a neural network. According to embodiments of the present disclosure, a solution for compensating reference signals to train a neural network is proposed. A second device transmits information to a first device. The information is used to trigger generation and transmission of compensated training reference signals. The information indicates a set of receiving ports at the first device. The first device compensates the training reference signals based on downlink channel information and transmits the compensated signals to the second device via one or more transmitting ports. In this way, CSI can be obtained more accurately. Further, a processing model at the second device can be improved.

公开(公告)号：US20230396466A1

公开(公告)日：2023-12-07

申请号：US18248859

申请日：2020-10-16

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Nuan SONG

IPC: H04L25/02

CPC classification number: H04L25/0224 ,  H04L25/0254

Abstract: Example embodiments of the present disclosure relate to monitoring a data processing model for channel information recovery. According to embodiments of the present disclosure, a solution for monitoring a data processing model for channel information is proposed. Two parallel measures by the data processing model for both the uplink and the downlink channels are used to determine whether the data processing model is available. In this way, it does not require extra feedbacks, which significantly reduces the overhead in the communication system and the computation efforts.

公开(公告)号：US20230163824A1

公开(公告)日：2023-05-25

申请号：US17919428

申请日：2020-04-21

Applicant: NOKIA TECHNOLOGIES OY

Inventor： Nuan SONG

IPC: H04B7/06 ,  H04L5/00

CPC classification number: H04B7/0626 ,  H04L5/0048

Abstract: Example embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media of a Channel State Information (CSI) feedback with low overhead. The method comprises in response to receiving, from a second device, a reference signal on a channel between the first device and the second device, obtaining a first component and a second component from the reference signal, the first component and the second component being orthogonal to each other; determining a first transformed component and a second transformed component for characterizing the channel by performing a transformation on the first component and the second component; generating a set of parameters associated with characteristics of the channel by quantizing the first transformed component and the second transformed component; and transmitting the set of parameters to the second device. The proposed CSI feedback can even be flexibly combined with existing overhead reduction schemes such as the beamformed CSI-RS and CSI compression, which further reduces the CSI overhead. Furthermore, the proposed scheme ensures very fast processing at UE and reduces the latency.

公开(公告)号：US20240340779A1

公开(公告)日：2024-10-10

申请号：US18695257

申请日：2021-09-30

Applicant: Nokia Technologies Oy

Inventor： Tao YANG ,  Pingping WEN ,  Hao LIU ,  Nuan SONG ,  Yan ZHAO

IPC: H04W48/16 ,  H04W72/1268 ,  H04W76/10

CPC classification number: H04W48/16 ,  H04W72/1268 ,  H04W76/10

Abstract: Example embodiments of the present disclosure relate to methods, devices apparatuses and computer readable storage media of an access procedure for Cell-free Multi-input Multi-output (MIMO). In example embodiments, a terminal device transmits an access request to a first set of uplink access network devices. The access request contains a list of identifications of candidate downlink access network devices. Then, the terminal device receives an access response from a first set of downlink access network devices.