Telefonaktiebolaget Lm Ericsson (publ)

Mediatek Corporation

Mediatek Singapore Pte. Ltd.

Ericsson Gmbh

Industrial Technology Research Institute

Jiann-Ching Guey

Chia-Hao Yu

Ming-Po Chang

Havish Koorapaty

Dennis Hui

Jung-Fu Cheng

Chun-Hsuan Kuo

Cheng-Rung Tsai

Chiou-Wei Tsai

Weidong Yang

Mattias Frenne

Daniel Chen Larsson

Kumar Balachandran

Kambiz Casey Zangi

Chao-Cheng Su

Yuanyuan Zhang

Ali S Khayrallah

Lung-Sheng Tsai

Ju-Ya Chen

Chien-Hwa Hwang

Shing-Wa Wong

Pei-Kai Liao

Leonid Krasny

Chien-Yi Wang

Abdulrauf Hafeez

Nils Rutger Rydbeck

Aimin Justin Sang

Timothy Perrin Fisher-Jeffes

R David Koilpillai

Tzu-Han Chou

Barbara Davis Molnar

Hsien-Ping Lin

Pål Frenger

Sven Oscar Petersson

Tao Chen

Rajaram Ramesh

Peter Larsson

Christian Hoymann

Hsuan-Li Lin

Ylva Jading

Chien-Chang Li

Abdelkader Medles

Yu-Chuan Lin

Chun-Ming Kuo

Essam Abdelfattah Sourour

Tzu-Jane Tsai

Afif Osseiran

Gyu Bum Kyung

Daniel Larsson

Chao-Yuan Hsu

Arnaud Abel Francois Cupillard

Abdulfauf Hafeez

Dennis Hul

Cheng Rung Tsai

Wei-Yen Wong

Sandeep Bhat

Chin-Kuo Jao

Yahia Ahmed Mahmoud Mahmoud Shabara

Pedram Kheirkhah Sangdeh

Guo Hau Gau

Method and UE are provided for determining precoder of MIMO system. In particular, a BS can transmit at least one CSI-RS to the UE. The UE can receive the at least one CSI-RS, and estimate at least one covariance matrix of at least one downlink channel matrix according to the at least one CSI-RS at different times and frequencies. Then, the UE can transmit the at least one covariance matrix or at least one parameter associated with the least one covariance matrix to the BS for the BS to reconstruct at least one covariance matrix, and determine a precoder according to the at least one reconstructed covariance matrix.

Method and user equipment for determining precoder of MIMO system

A user equipment (UE) with N transmit (Tx) antenna elements in a wireless network receives precoding information from a base station. The UE constructs a full-rank complex Hadamard matrix (CHM) of order N using the precoding information. The UE then precodes uplink signal using a precoding matrix composed of one or more columns of the full-rank CHM, and transmits the precoded uplink signal to the base station.

High spatial resolution MIMO precoding for uplink communication

A method of downlink channel state information (DL CSI) measurement and reporting is proposed in FR1 frequency division duplex (FDD) systems. CSI reference signal (CSI-RS) is directed towards dominant spatial domain (SD, beam) and frequency domain (FD, delay) components in the propagation environment. By partial channel reciprocity, angles and delays in the DL channel can be obtained by UL channel measurement. UE only needs to measure and feedback the DL CSI corresponding to the dominant angles and delays. BS obtains the precoder in the antenna-frequency domain using the CSI feedback in the beam-delay domain. BS uses the precoder for transmission over Physical downlink shared channel (PDSCH). In one embodiment, UE reconstructs the DL channel on a multitude of delays using the DL channel estimated on a few beamformed CSI-RS and delay tap indices signaled from the network.

Method for FR1 FDD channel state information

Techniques pertaining to channeling state information (CSI) pre-processing are described. A user equipment (UE) that is in wireless communication with a base station node extracts eigenvectors (EVs) from CSI acquired by the UE. The UE generates pre-processed CSI for compression by a machine-learning (ML)-based encoder of the UE into CSI feedback for the base station node by at least performing one or more of a phase discontinuity compensation (PDC), a one-step polarization separation with re-ordering, or a two-step polarization separation that includes separation based on polarization type and separation by position on the EVs.

Techniques for channel state information (CSI) pre-processing

The scheduling flexibility of CSI reference signals enables time and frequency synchronization using multiple non-zero CSI-RSs transmitted in the same subframe, or using CSI-RSs transmitted in the same subframe with other synchronization signals. Also, multiple synchronization signals may be scheduled in the same subframe to enable fine time and frequency synchronization without cell-specific reference signals.

Time and frequency synchronization

A method of downlink channel state information (DL CSI) computation and reporting is proposed to support high velocity in new radio (NR) systems. In a first novel aspect, two CSI reference slots are defined. CSI reference slot for CSI measurement is defined for determining which CSI-RS/SSB occasion(s) is used for computing CSI. CSI reference slot for CSI computation is defined for determining the slot where UE assumes the CSI computation should be based upon the channel at that time onwards. In a second novel aspect, UE can be configured with a CSI computation period consisting of one or N slots and can be divided into multiple sub-periods without overlap. UE can be configured to compute and report wideband CSI and subband CSI for the whole CSI computation period and/or for each sub-period.

Method for configuring channel state information computation period for high mobility

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE receives a first indication that downlink control information in a control channel schedules C downlink data channels on a component carrier. C is an integer greater than 0. The UE receives a second indication that acknowledgments of the C downlink data channels are transmitted according to N transport block (TB) groups. N is an integer greater than 0. The UE allocates the C downlink data channels to the N TB groups and transmitting N respective acknowledgments corresponding to the N TB groups based on a relation between C and N.

PDSCH grouping transmission and associated HARQ-ACK codebook construction for multi-PDSCH scheduling

A partial sounding method for sounding-reference-signal (SRS) is proposed. The network node may transmit higher-layer signal configuring a fractional SRS resource for partial sounding in configured resource blocks (RBs) to user equipment (UE). The UE may determine an SRS sequence length and a frequency-domain starting position of the fractional SRS resource based on the higher-layer signal to increase the SRS capacity.

Partial sounding method for sounding reference signal in mobile communications

Method for channel state information measurement and computation for high mobility

The UE allocates a slot group including a number of consecutive slots based on an operating subcarrier spacing. The UE receives a configuration allocating blind detections over non-overlapping CCEs in the slot group among a group of component carriers of the UE using the operating subcarrier spacing. The UE performs, in the slot group, a next set of blind detections over a next set of non-overlapping CCEs on a given component carrier of the group of component carriers in accordance with the configuration, when (a) a total number of blind detections that would have been performed in the slot group by the UE does not exceed a limit of total blind detections and (b) a total number of non-overlapping CCEs that would have been monitored in the slot group by the UE does not exceed a limit of total non-overlapping CCEs.

Multi-slot PDCCH monitoring framework

Examples pertaining to a floating frame-based channel occupancy time (COT) in a fixed frame period (FFP) in mobile communications are described. An apparatus implemented in FBE performs clear channel assessment (CCA) of a channel. The apparatus then transmits during a COT within a FFP in response to the CCA indicating the channel to be clear for transmission.

Floating frame-based channel occupancy time in fixed frame period in mobile communications

In an aspect of the disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE detects one or more signals transmitted from a base station in a first unit of a set of units contained in a bandwidth part of an unlicensed carrier, the first unit having contiguous frequency resources. The one or more signals indicating that the base station has occupied the first unit for a first time duration and indicating a schedule of a set of slots in the first time duration for communication with the base station. The UE receives, in a first time slot of the set of slots and from the base station, a control channel.

BWP operation in NR-based unlicensed spectrum

An apparatus (e.g., a user equipment (UE)) maps a plurality of mutually orthogonal sequences to each of a plurality of physical resource blocks (PRBs) within an interlace. The apparatus then performs a physical uplink control channel (PUCCH) transmission in a New Radio unlicensed spectrum (NR-U). The apparatus also receives an assignment of a set of sequences for each PRB of the plurality of PRBs from a wireless network. In response, the apparatus performs an uplink control information (UCI) transmission via the PUCCH in the NR-U.

Enhanced PUCCH format 0 and format 1 design for new radio unlicensed spectrum operation

Techniques and examples of efficient detection of a transmission session in New Radio unlicensed spectrum (NR-U) are described. An apparatus (e.g., user equipment (UE)) detects presence of an indication from a base station of a wireless network in an NR-U. The apparatus determines that a transmission opportunity (TXOP) follows the indication responsive to the detecting. The apparatus then receives a downlink (DL) transmission in the NR-U from the base station during the TXOP.

Detection of beginning of a transmission session in new radio unlicensed spectrum

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Hsinchu, Taiwan

Jiann-Ching Guey