Telefonaktiebolaget Lm Ericsson (publ)

Blackberry Corporation

Motorola Corporation

Motorola Mobility LLC

Research in Motion Corporation

Malikie Innovations Limited

Motoorla Inc

Robert Mark Harrison

Shiwei Gao

Siva Dharshan Muruganathan

Mattias Frenne

Sebastian Faxér

Zhijun Cai

Hua Xu

Stephen J Grant

Youn Hyoung Heo

Zhipeng Lin

Mo-Han Fong

Andrew Mark Earnshaw

Yongkang Jia

Sean Michael McBeath

Niklas Wernersson

Yufei W Blankenship

Masoud Ebrahimi Tazeh Mahalleh

Andreas Nilsson

Mansoor Ahmed

George Jöngren

Florent Munier

Andres Reial

Robert Novak

Nicholas William Anderson

Eswar Kalyan Vutukuri

Bo Lincoln

Jan Christoffersson

Sven Oscar Petersson

Yi Song

Zhang Zhang

Lars Lindbom

Johan Axnäs

Vahid Pourahmadi

Heunchul Lee

Muhammad Ali Kazmi

Robert Baldemair

Havish Koorapaty

Sorour Falahati

Johan Furuskog

Ali Behravan

Henrik Enbuske

Andreas Cedergren

Du Ho Kang

Ling Su

Jun J Li

Mark Earnshaw

Jingya Li

Timothy A Thomas

Asbjörn Grövlen

Dongsheng Yu

Fredrik Nordström

Yiping Wang

Bishwarup Mondal

Jack Anthony Smith

Stefania Sesia

Shiguang Guo

Kamyar Rohani

Jonas Sedin

Paul Fielding Smith

Nick W Whinnett

Yufei Wu Blankenship

Krishna Chitti

Sebastian Faxer

Johan Rune

Robert T Love

James Earl Womack

Rapeepat Ratasuk

Laetitia Falconetti

Mats Folke

John Douglas Reed

Srikanth Gummadi

Hao Bi

Rene Waraputra Purnadi

Stephen Lee Spear

Behrooz Makki

Terry Michael Schaffner

Walter J Rozanski, Jr

Robert Karlsson

Kevin M Laird

Mark Ian Van Horn

David Myara

Jean-Aicard Fabien

Athanasios Stavridis

Soodesh Buljore

Joseph J Pautler

Richard Tonge

Zhijun Chi

Sean Michael Mcbeath

Various embodiments of the present disclosure provide a method for random access. The method which may be performed by a terminal device comprises performing a first transmission of a message from the terminal device to a network node in a random access procedure, according to first configuration information. The first transmission of the message comprises a transmission of a first preamble and a transmission of a payload on a shared channel. The method further comprises performing a second transmission of the message from the terminal device to the network node in the random access procedure, according to second configuration information. The second transmission of the message comprises at least one of: a transmission of a second preamble and a retransmission of the payload on the shared channel.

Method and apparatus for random access

Embodiments of the present disclosure provide methods, apparatus and computer program products for transmitting and receiving an uplink signal on physical control channel. A method comprises: determining that a terminal device has a capability of transmitting the uplink signal on physical control channel in at least a first time instant and a second time instant coherently; performing a first transmission of the uplink signal on physical control channel in the first time instant in a first set of subcarriers; and performing a second transmission of the uplink signal on physical control channel in the second time instant in a second set of subcarriers.

Method and apparatus for PUCCH coverage enhancement

The present disclosure provides a method in a User Equipment of transmitting a random access preamble and a physical uplink shared channel, comprising: determining a resource size to be used to contain the physical uplink shared channel, the resource size being one of a set of predetermined sizes; identifying a resource to be used from a predetermined set of resources, the resource in the set of resources corresponding to the determined resource size, each resource being identified with a respective first index n and occupying a distinct set of OFDM symbols and subcarriers; identifying a PRACH preamble with a second index n' corresponding to the first index n of the identified resource; and transmitting the identified PRACH preamble, and the physical uplink shared channel in the identified resource.

Method and apparatus for physical uplink shared channel format adaptation

Methods and apparatuses for downlink control information. A method at a network device comprises determining a format of downlink control information (DCI) used for scheduling of downlink shared channel in a 2-step random access procedure. The method further comprises determining an identifier used for scrambling cyclic redundancy check (CRC) of the format of DCI. The identifier comprises at least one of a common identifier or a specific identifier. The method further comprises transmitting information regarding a scheduled downlink shared channel with the format of DCI with the CRC scrambled by the identifier on a downlink control channel to at least one terminal device.

Method and apparatus for downlink control information

A method of transmitting a Random Access Channel (RACH) Occasion configuration to a terminal device and receiving a RACH preamble according to the RACH Occasion configuration. The RACH Occasion configuration comprises a first time resource indication identifying a first set of time resources in which the terminal device is allowed to transmit a RACH preamble according to a first random access procedure, a first frequency resource indication identifying at least a first set of frequency resources in which the terminal device is allowed to transmit the RACH preamble, a second time resource indication identifying a second set of time resources in which the terminal device is allowed to transmit a RACH preamble according to a second random access procedure, and a second frequency resource indication identifying at least a second set of frequency resources in which the terminal device is allowed to transmit the RACH preamble.

Network device, terminal device, and methods therein

Embodiments of the present disclosure provide methods and apparatuses for random access procedure. A method at a user equipment (UE) comprises selecting a synchronization signal and physical broadcast channel block (SSB) with a signal measured metric satisfying a criterion. The method further comprises transmitting a first message including a random access channel (RACH) preamble on a RACH occasion and data on an uplink shared channel (USCH) to a base station. The RACH preamble and the RACH occasion are selected based on a mapping of the SSB to the RACH preamble and the RACH occasion. The method further comprises receiving a second message from the base station as a response to the first message.

Method and apparatus for random access procedure

Systems and methods are disclosed herein for determining a power to be used for a set of antenna ports for a physical uplink shared channel transmission. In some embodiments, a User Equipment (UE) comprises processing circuitry configured to derive a power P to be used for uplink power control for a physical uplink shared channel transmission and determine a power to be used for a set of antenna ports based on the power P according to a rule that depends on whether the UE is utilizing codebook based transmission or non-codebook based transmission for the physical uplink shared channel transmission. The set of antenna ports is antenna ports on which the physical uplink shared channel transmission is transmitted with non-zero power.

Power control for new radio uplink single-user multiple-input-multiple-output communication

According to some aspects of the techniques disclosed herein, a UE adapted to transmit on different antenna subsets transmits an indication that the UE can transmit a number of distinct RS resources, where each of the RS resources comprises at least one RS port. The UE transmits capability information indicating that the UE is capable of transmitting simultaneously on multiple RS resources and/or receives first and second RS configurations, where the first RS configuration is a first list of SRS resources that at least correspond to RS resource indications used for PUSCH transmission, and the second RS configuration is a second list of RS resources that may be used for SRS transmission. The UE receives an indication of at least one RS resource and transmits a physical channel on antennas of the UE associated with the indicated RS resources.

Multi-resource uplink sounding and antenna subset transmission

According to some embodiments, a method performed by a wireless device for transmitting multiple layers of an uplink physical channel comprises transmitting to a network node an indication of a capability to operate according to a first mode of operation and a second mode of operation. In the first mode a codebook subset comprises precoding matrices with at most one non-zero elements per column, and in the second mode the codebook subset comprises precoding matrices with at most two non-zero elements per column. The codebook subset is in a codebook for use when transform precoding of a physical channel is disabled. The method further comprises receiving a configuration from the network node for a selected mode of operation, and transmitting the physical channel using transform precoding and, at least when transmitting with two layers, using the codebook subset comprising the precoding matrices of the selected mode.

DFT-S-OFDM multiple layer and subband transmission

Methods and apparatuses are disclosed for PUSCH resource selection in 2-step random access (RA). In one embodiment, a wireless device is configured to receive a two-step RA configuration having: a first resource allocation for a PUSCH transmission of a first message, msgA, of the two-step RA procedure, the first resource allocation for the PUSCH transmission of the msgA being associated with a first set of preambles; and a second resource allocation for the PUSCH transmission of the msgA associated with a second set of preambles; select one of the first and second resource allocation and the associated one of the first and second set of preambles based on the two-step RA configuration and a payload size of the PUSCH transmission of the msgA; and transmit the PUSCH transmission of the msgA using the selected one of the first and second resource allocation.

PUSCH resource selection in 2-step random access

Embodiments include methods for user equipment (UE) random access to a cell in a wireless network. Such methods include selecting one of a plurality of available random-access preambles and mapping the selected random-access preamble to one of a plurality of available physical uplink shared channel (PUSCH) resource units (PRUs) based on a mapping constraint. In the mapping constraint, one or more of the available PRUs are not used for the mapping and an integer number of the available random-access preambles are mapped to each of the available PRUs that are used for the mapping. Such methods also include transmitting the selected random-access preamble on a random access channel (RACH) and transmitting a data message on the PRU mapped to the selected random-access preamble. Other embodiments include complementary methods for a network node, as well as UEs and network nodes configured to perform such methods.

Methods for balancing resources utilized in random-access procedures

A method is performed by a wireless device for accessing a network. The method comprises performing a two-step random access procedure. This comprises transmitting a preamble in at least one Physical Random Access Channel, PRACH, occasion, and transmitting a Physical Uplink Shared Channel, PUSCH. A position of the at least one PRACH occasion for transmitting the preamble is determined to ensure that a gap between transmitting the preamble and transmitting the PUSCH is less than a predetermined duration.

Two-step random access procedure

According to some embodiments, a method for use in a network node of transmitting channel state information reference signals (CSI-RS) comprises: transmitting, to the wireless device, an indication of the subset of PRBs that the wireless device should use to measure CSI-RS; and transmitting CSI-RS on the indicated subset of PRBs. According to some embodiments, a method for use in a wireless device of receiving CSI-RS comprises: receiving an indication of a subset of PRBs that the wireless device should use to measure CSI-RS associated with an antenna port; and receiving CSI-RS on the indicated subset of PRBs. In some embodiments, the indication of the subset of PRBs that the wireless device should use to measure CSI-RS comprises a density value and a comb offset.

Mechanisms for reduced density CSI-RS

Various embodiments of the present disclosure provide methods and apparatuses for determining radio network temporary identifier (RNTI) in a two-step random access procedure. A method of a terminal device, comprising: determining a request message for random access, wherein the request message comprises a preamble and a physical uplink shared channel, PUSCH, message and the PUSCH message is determined based on a first radio network temporary identity, RNTI; transmitting the request message; and obtaining a response message for random access based on a second RNTI, wherein the first RNTI and the second RNTI are the same or different.

Method and apparatus for determining radio network temporary identifier in two-step random access procedure

Systems and methods relating to frequency-selective Sounding Reference Signal (SRS) precoding and uplink transmission are disclosed. In some embodiments, a method of operation of a wireless device comprises transmitting SRS on a first set of frequency-domain resources, and receiving an uplink scheduling assignment for an uplink physical channel comprising a resource allocation of a second set of frequency-domain resources comprising: (a) one or more frequency-domain resources that are also included in the first set and (b) one or more frequency-domain resources that are not included in the first set. In order to form a precoded uplink channel, the method further comprises: for each frequency-domain resource in (a), applying a same precoding as applied to the SRS on the frequency-domain resource; and, for each frequency-domain resource in (b), applying a same precoding as applied to the SRS on a different frequency-domain resource. The method further comprises transmitting the precoded uplink channel.

Systems and methods regarding frequency- selective SRS transmission and PUSCH precoding

Growing community of inventors

Grapevine, TX, United States of America

Robert Mark Harrison