Telefonaktiebolaget Lm Ericsson (publ)

Guangdong Oppo Mobile Telecommunications Corp., Ltd.

Henrik Enbuske

Torsten Dudda

Jan Christoffersson

Gustav Wikström

Mats Folke

Mattias Bergström

Jose Luis Pradas

Jinhua Liu

Henrik Sahlin

Robert Mark Harrison

Min Wang

Zhipeng Lin

Robert Baldemair

Stefan Parkvall

Johan Rune

Johan Mikael Bergman

Henning Wiemann

Qianxi Lu

Michael Meyer

Marco Belleschi

Eva Englund

Daniel Chen Larsson

Paul Schliwa-Bertling

Andres Reial

Janne Peisa

Jonas Fröberg Olsson

Stefan Wänstedt

Muhammad Ali Kazmi

Iana Siomina

Ghyslain Pelletier

Gunnar Mildh

Yufei W Blankenship

Stefan Wager

Fredrik Gunnarsson

Yi-Pin Eric Wang

Stefano Sorrentino

John Walter Diachina

Magnus Stattin

Sorour Falahati

Pradeepa Ramachandra

Miguel Lopez

Joachim Sachs

Kumar Balachandran

Laetitia Falconetti

Dirk Gerstenberger

Zhang Zhang

Andreas Höglund

Osman Nuri Can Yilmaz

Olof Liberg

Niklas Andgart

Mattias Andersson

János Farkas

Ying Sun

Jens Bergqvist

Sándor Rácz

Anders Furuskär

Dinand Roeland

György Miklós

Johan Axnäs

Stefano Ruffini

Patrik Salmela

Nianshan Shi

Edgar Ramos

Tuomas Tirronen

Ritesh Shreevastav

Bernard Smeets

Oscar Ohlsson

Dennis Sundman

Håkan Persson

Malik Wahaj Arshad

Robert Karlsson

Zhenhua Zou

Jonas Sedin

Anna Larmo

Alexander Vesely

Sara Sandberg

José Araújo

Kittipong Kittichokechai

Christian Skärby

Magnus Sandgren

Jörg Huschke

Balázs Varga

Håkan Palm

Magnus Lindström

Kai-Erik Sunell

Geza Szabo

Harald Gustafsson

Peter Moberg

Antonino Orsino

Björn Hofström

Ann-Christine Eriksson

Kimmo Juhani Hiltunen

Ylva Timner

Yunxi Li

Mats Buchmayer

Joakim Åkesson

Dung Pham Van

Per Persson

Alexey Shapin

Norbert Reider

Buffer Status Reports (BSR), by which the network is made aware of uplink transmission needs of wirless devices, are specifically enabled to be transmitted using 2-step Random Access (RA), to reduce latency and network resource use. In one embodiment, 2-step RA configurations tailored to BSR-transmissions are introduced. These may, for example, use a subset of the configured resources in the configured 2-step RA resources for BSR. In another embodiment, conditions for triggering BSR over 2-step RA, depending on the traffic, are introduced. For example, the priority or the the delay budget of the traffic may be used to determine whether a BSR over 2-step RA should be triggered. In another embodiment, simplified procedures when receiving the response to MsgA are introduced. These may include, for example, not transmitting a full MsgB, but rather having the UE receive an UL grant.

Efficient buffer status reporting over 2-step RA

Techniques are provided to enable use of more than two preamble group Bs during random access (RA) for connected UEs. This flexibility is achieved by configuring the active BWP to overlap with the 2-step RA resources on the initial BWP, configuring different sizes of preamble group B in the initial BWP and the active BWP, a allowing connected UEs in the active BWP to use the MsgA PRACH and MsgA PUSCH resources in the initial BWP without switching active BWP.

Random access resource configuration in different bandwidth parts for two-step random access

According to certain embodiments, a method performed by a wireless device comprises receiving a first grant and a second grant from a network node. The first grant and the second grant are overlapping. The method comprises determining a prioritized one of the first grant and the second grant and constructing a Medium Access Control (MAC) Protocol Description Unit (PDU) for the prioritized grant of the first grant and the second grant. According to certain embodiments, a method performed by a network node comprises transmitting a first grant and a second grant to a wireless device. The first grant and the second grant are overlapping. The method comprises receiving a transmission from the wireless device on a prioritized one of the first grant and the second grant.

Multiple grant handling in mixed services scenarios

According to certain embodiments, a method performed by a wireless device comprises receiving a first grant and a second grant from a network node. The first grant and the second grant are overlapping. The method comprises pre-empting a transmission for the first grant based on prioritizing a transmission for the second grant. The method comprises controlling a timer used in a hybrid automatic repeat request (HARQ) process associated with the first grant based on pre-empting the transmission for the first grant.

Configured grant timer in intra-user equipment multiplexing

A wireless device determines whether to provide a reduced capability, RedCap, indication via a message 1 of a random access procedure. The wireless device transmits the message 1 based on the determination, and transmits a message 3 of the random access procedure. A RedCap indication is provided via the message 3 at least if a RedCap indication is not provided via the message 1. According to some embodiments, the wireless device receives an indication whether the wireless device is to provide a RedCap indication via the message 1, and the determination is based on the received indication. According to some embodiments, the indication whether the wireless device is to provide a RedCap indication via the message 1 is provided by whether a physical random access channel, PRACH, partition between RedCap wireless devices and other wireless devices is configured.

Early indication for reduced capability devices

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

In one embodiment, a method in a wireless device for adaptive HARQ retransmissions comprises receiving, from a network node, a request to initiate an adaptive hybrid automatic repeat request (HARQ) retransmission. The method comprises identifying a HARQ process associated with the HARQ retransmission request and determining whether a HARQ buffer of the HARQ process is empty. In response to determining that the HARQ buffer is empty, the method comprises not delivering the HARQ information to the HARQ process and not triggering an adaptive HARQ retransmission.

SPS with skipping transmissions and adaptive HARQ

A wireless device configured to perform a 2-step random access, RA, procedure transmits () a message according to the 2-step RA procedure, the message comprising a first random access preamble. The wireless device receives (), during a RA response window following the transmitting of the message, a Medium Access Control, MAC, subheader. Using one or more bits or fields included in the received subheader, the wireless device determines () that it should take action according to any one of the following: backing off, according to a back-off parameter, for a subsequent RA attempt according to the 2-step RA procedure; falling back to a 4-step RA procedure by transmitting a new RA preamble; and falling back to a 4-step RA procedure after backing off according to a back-off parameter, by transmitting a new random access preamble after the back-off.

Back-off for 2-step RA procedure

A wireless device is configured to receive information from a network node. The information indicates whether or not a medium access control, MAC, service data unit, SDU, for a signaling radio bearer, SRB, or data radio bearer, DRB, is to be received by the wireless device in the same MAC protocol data unit, PDU, as a MAC PDU carrying a random access success response message. This random access success response message indicates both a random access channel and an uplink shared channel payload were decoded successfully. In some embodiments, the wireless device is configured to receive a MAC PDU carrying the random access success response message, and to process the received MAC PDU based on the received information indicating whether a MAC SDU for an SRB or DRB is included in the received MAC PDU.

Configuration of a random access procedure

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

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

A terminal device for a wireless communication network is configurable with a plurality of transmission time intervals. An example method comprises: receiving a grant message comprising an indication of radio resources in which the terminal device can transmit one or more wireless messages, the radio resources being configured according to a first transmission time interval of the plurality of transmission time intervals; determining the presence of data to transmit, the data being associated with a logical channel; determining a maximum transmission time interval associated with the logical channel; and, responsive to a determination that the maximum transmission time interval associated with the logical channel is less than the first transmission time interval, transmitting a scheduling request message. The scheduling request message is configured according to a second transmission time interval of the plurality of transmission time intervals, shorter than the first.

Methods and apparatus for utilizing short transmission time intervals in a wireless communications network

Methods, network device and terminal device are disclosed time advance adjustment. A method comprises receiving a time advance, TA, command from a network device; determining a TA granularity or range; and determining a TA value based at least partly on the TA command and the TA granularity or range, wherein different numerologies are configured for at least two carriers and/or at least two bandwidth parts (BWPs) in one carrier, wherein the at least two carriers and/or the at least two BWPs serve the terminal device and/or the terminal device supports at least one numerology.

Method, terminal device and network device for time advance adjustment

Systems and methods are disclosed herein for transmitting a mixture of critical and non-critical data in a wireless network. In some embodiments, a method performed by a wireless device comprises receiving a configured uplink grant that allocates uplink resources in a plurality of transmission time intervals and determining, at a time t, that critical data is to be transmitted using the configured uplink grant, where a time t+PT occurs after a start of a particular transmission time interval and where PT is a preparation time needed to prepare an uplink transmission on the configured uplink grant. The method further comprises transmitting an uplink transmission comprising the critical data using allocated uplink resources in the particular transmission time interval starting at a time that is at or after the time t+PT. Corresponding embodiments of a wireless device are also disclosed.

Handling misalignment between arrival of critical data for transmission and transmission occasions of a configured grant

According to certain embodiments, a method for synchronous control of timing configurations includes operating a wireless device according to a first timing configuration associated with a first delay duration for transmitting feedback to a network node. A second timing configuration associated with a second delay duration for transmitting feedback to the network node is received from the network node. The second delay duration is different from the first delay duration. In response to a first downlink transmission from the network node, a first feedback is scheduled for transmission at a transmission time determined based on the second delay duration associated with the second timing configuration.

Systems and methods for synchronous control of HARQ configurations

Growing community of inventors

Stockholm, Sweden

Henrik Enbuske