Samsung Electronics Co., Ltd.

Gilwon Lee

Eko Nugroho Onggosanusi

Md Saifur Rahman

Jeongho Jeon

Jianzhong Zhang

Joonyoung Cho

Emad N Farag

Ahmed Atef Ibrahim Ibrahim

Caleb K Lo

Yang Li

Ebrahim MolavianJazi

Shadi Abu-Surra

Yeqing Hu

Calibration in distributed multiple input multiple output (MIMO) networks. A method performed by a first base station (BS) includes receiving a first uplink (UL) reference signal (RS) and determining, based on the first UL RS and a second UL RS, a first phase offset for transmission of a first downlink (DL) RS to a user equipment (UE). The second UL RS is associated with a second BS. The first phase offset of the first DL RS is relative to a second DL RS associated with the second BS. The method further includes transmitting the first DL RS with the first phase offset; receiving UE feedback associated with the first DL RS and the second DL RS; and determining, based on the first phase offset and the received feedback, for a DL data transmission to the UE, a second phase offset between transmissions of the first BS and the second BS.

Method and apparatus for calibration in distributed mimo networks

Apparatuses and methods for multi-stage downlink control information (DCI) for uplink (UL) precoding in a wireless communication system. A method for operating a user equipment (UE) receiving, via a two-stage DCI framework, configuration information for transmission of an UL signal. The configuration information includes allocated resources for the UL signal transmission and UL precoding information. The method further includes applying, based on the UL precoding information, UL precoding for the transmission of the UL signal and transmitting the precoded UL signal on the allocated resources. The two-stage DCI framework includes a first-stage DCI, X, and a second-stage DCI, X. The first-stage DCI, X, includes at least one of first information associated with the second-stage DCI and a first part of the configuration information. The second-stage DCI, X, includes at least one of second information based on the first information and a second part of the configuration information.

Method and apparatus for multi-stage DCI for uplink precoding

Methods and apparatuses for interference management in a wireless communication system. A method for operating a user equipment (UE) includes receiving configuration information about I. I is interference information for interfering Nremote radio heads (RRHs), where N≤N−1. The configuration information indicates a number of RRHs, N>1. The method further includes determining, based on the interference information I, a downlink (DL) spatial filter using P antenna ports, where P>1, and receiving DL data using the determined DL spatial filter.

Method and apparatus for interference management

A method for operating a user equipment comprises transmitting a capability information including a total number (X) of transmit-receive (Tx-Rx) entities at the UE; receiving, based on the capability information, configuration information including information on reporting a selection of Y Tx-Rx entities; selecting, based on the configuration information, the Y Tx-Rx entities; determining a report including an indication about the selection of the Y Tx-Rx entities; and transmitting the report, wherein the Y Tx-Rx entities are selected from X Tx-Rx entities that comprise all of or a subset of the XTx-Rx entities at the UE, and X≤X.

Uplink transmit beam selection based on downlink and uplink resource signal measurements

Machine learning (ML) adaptation of any one of reference signal (RS) temporal density, RS frequency density, RS spatial density, or number of transmission/reception points (TRPs) that transmit RS provides configuration of lower RS densities or fewer TRPs that transmit RS without significant loss of throughput in appropriate circumstances. Determinations to switch from high density transmission to low density transmission, to reduce the number of antenna ports or TRPs that transmit RS, or to fallback to high density transmission may be made by the ML model, optionally with UE assistance information.

Method and apparatus for reference symbol pattern adaptation

A method for operating a user equipment (UE) comprises receiving configuration information about a channel state information (CSI) report, the configuration information including a number of radio remote heads (RRHs), N>1; selecting a subset of RRHs from the NRRHs independently for each subband (SB); determining the CSI report including an indicator indicating the selected subset of RRHs for each SB; and transmitting the CSI report including the indicator indicating the selected subset of RRHs for each SB.

Method and apparatus for modular massive MIMO

Capability of a user equipment to support machine learning adaptation by a base station of a reference signal pattern is signaled between the base station and the user equipment. Configuration information from the base station indicates one or more of enabling or disabling of machine learning adaptation of the reference signal pattern, a machine learning model used for machine learning adaptation of the reference signal pattern, updated model parameters for the machine learning model, or whether model parameters received from the user equipment will be used for machine learning adaptation of the reference signal pattern. Model training may be performed or model parameters received, and reference signals are received from the base station. Information on a reference signal pattern may be transmitted by the user equipment to the serving base station. Assistance information may be transmitted by the user equipment to the base station, which configures a reference signal pattern.

A user equipment (UE) is configured to perform a method for measuring and reporting multi-beam operations. The UE includes a transceiver configured to communicate via a multi-beam operation with a base station. The UE further includes a processor operably connected to the transceiver. The processor is configured to at least one of: transmit, via the transceiver through a first set of antenna ports, one or more uplink (UL) reference signals (RSs), or receive, via the transceiver, one of: one or more downlink (DL) RSs transmitted by a base station (BS), or the one or more transmitted UL RSs, measure, via the transceiver using a second set of antenna ports, signal qualities of the one or more UL RSs and the one or more DL RSs for a time period, and perform measurement reporting of the measured signal qualities.

Method and apparatus for measurement and reporting for multi-beam operations

A method for a beam-specific operation between a base station (BS) and a user equipment (UE) is provided. The method comprises obtaining a configuration for at least one of a downlink (DL) reception or an uplink (UL) transmission, wherein the configuration comprises beam identifiers (IDs) and a slot and symbol configuration for respective ones of the one or more beam IDs. The method further includes performing, according to the configuration information, a DL operation or an UL operation.

Method and apparatus for beam-specific downlink/uplink operation

Apparatuses and methods for CSI reporting in distributed MIMO in a wireless communication system is provided. The method includes receiving a channel state information (CSI) report setting about a first type of information CSI(0), . . . , CSI(N) for N>1, receiving a CSI reference signal (CSI-RS) resource setting about a plurality of CSI-RS resources, CSI-RS(0), . . . , CSI-RS(N−1) transmitted from Ngroups of CSI-RS ports, wherein Nis a number of remote radio heads (RRH). The method further includes measuring the plurality of CSI-RS resources CSI-RS(0), . . . , CSI-RS(N−1), determining, based on the measurement, the first type of information CSI(0), . . . , CSI(N−1); and transmitting information indicating the first type of information CSI(0), . . . , CSI(N−1).

Method and apparatus for CSI reporting in distributed MIMO

A method for operating a user equipment (UE) comprises receiving configuration information about L uplink (UL) reference signals (RSs), M downlink (DL) RSs, and a calibration report, where the L UL RSs are associated with the M DL RSs; transmitting the UL RSs according to the configuration information; measuring the DL RSs; determining, based on the measured DL RSs and a reference DL RS, calibration information; and transmitting the calibration report including the calibration information.

Method and apparatus for modular MIMO

Apparatuses and methods for high resolution CSI codebook is provided. The method includes receiving configuration information about a channel state information (CSI) report, the configuration information including a parameter d≥1, where d is a number of principal components; determining left principal component vectors; determining right principal component vectors; determining principal singular values; and transmitting the CSI report including a precoding matrix indicator (PMI), the PMI indicating the left principal component vectors, the right principal component vectors, and the principal singular values, wherein at least one of the left principal component vectors, the right principal component vectors, and the principal singular values are selected from adaptive codebooks.

Method and apparatus for high resolution CSI codebook

Apparatuses and methods for multi-stage UL precoding are provided. The method includes receiving configuration information about resource allocation for an uplink (UL) transmission, the configuration information indicating: allocated resources for an UL transmission, and UL precoding information for the UL transmission on the allocated resources, wherein the UL precoding information indicates: an update precoding matrix V, and basis vectors and coefficients for the update precoding matrix V; determining an UL precoding matrix for the UL transmission based on the update precoding matrix V and a previous UL precoding matrix; and performing UL transmission on the allocated resources using the UL precoding matrix.

Method and apparatus for multi-stage UL precoding

Apparatuses and methods for frequency selective uplink precoding are provided. The method includes receiving configuration information about resource allocation for an uplink transmission, the configuration information indicating: allocated resources for uplink transmission, and uplink precoding information for G antenna port groups for the uplink transmission on the allocated resources, wherein the uplink precoding information indicates: SD basis vectors, FD basis vectors, coefficients for (SD, FD) basis vector pairs, and two components for the coefficients across the G antenna port groups; based on the uplink precoding information, applying uplink precoding for the G antenna port groups; and performing uplink transmission on the allocated resources according to the configuration information.

Method and apparatus for frequency selective UL precoding

Methods and apparatuses for modular MIMO system and CSI feedback in a wireless communication system. The methods and apparatuses include: identifying configuration information of an antenna system including antenna modules for a MIMO operation; identifying, based on the configuration information, a number of collocated antenna groups that each includes one or more of the antenna modules; identifying, based on the configuration information, a number of the antenna modules for each type of the antenna modules in each of the collocated antenna groups, wherein each of the collocated antenna groups includes one or more types of the antenna modules; generating a CSI report for one or more of the collocated antenna groups in the antenna system; and transmitting, to a BS, the CSI report.

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McKinney, TX, United States of America

Gilwon Lee