Telefonaktiebolaget Lm Ericsson (publ)

Huawei Technologies Co., Limited

Future Wei Technologies, Inc.

Furuskog, Johan

Mattias Frenne

Daniel Chen Larsson

Jung-Fu Cheng

Siva Dharshan Muruganathan

Shiwei Gao

Johan Furuskog

Robert Baldemair

Havish Koorapaty

Robert Mark Harrison

Stephen J Grant

Sebastian Faxér

Stefan Parkvall

Qiang Zhang

Håkan Andersson

George Jöngren

Claes Tidestav

Lars Lindbom

Niclas Wiberg

Martin Hessler

Erik A Eriksson

Sorour Falahati

Henrik Sahlin

Dirk Gerstenberger

Andreas Nilsson

Jianghua Liu

Karl Werner

Simon Järmyr

Yufei W Blankenship

Andreas Bergström

Johan Kåredal

Stefano Sorrentino

Niklas Wernersson

Jianwei Zhang

Muhammad Ali Kazmi

Håkan Björkegren

Per Ernström

Jiann-Ching Guey

Zhipeng Lin

Fredrik Ovesjö

Sebastian FAXÉR

Yongxing Zhou

Johan Mikael Bergman

Angelo Centonza

Xingqin Lin

John Skördeman

Zhang Zhang

Jingya Li

Branislav M Popovic

Asbjörn Grövlen

Bo Lincoln

Christian Hoymann

Qiang Wu

Bo Göransson

Yu Yang

Fredrik Athley

Anders Wallén

Weijun Sun

Zhao Wang

Yang Tang

SaiRamesh Nammi

Jianguo Wang

Erik G Larsson

David Hammarwall

Mattias Andersson

Mats Folke

Svante Bergman

Helka-Liina Määttänen

Gino Masini

Florent Munier

Eleftherios Karipidis

Fredrik Gunnarsson

Yi-Pin Eric Wang

Ravikiran Nory

Ajit Nimbalker

Rui Fan

Sven Oscar Petersson

Chandra Sekhar Bontu

Shaohua Li

Olof Liberg

Jonas Fröberg Olsson

Helka-Liina Määttanen

Ali Behravan

Yutao Sui

Arne Simonsson

Fredrik Berggren

Miguel Berg

Ying Sun

Fredrik Nordström

David Jean-Marie Mazzarese

Hong Ren

Kittipong Kittichokechai

Virgile Garcia

George Jongren

Lackis Eleftheriadis

Fredric Carl Kronestedt

David Mazzarese

Anahid Robert Safavi

Sven Jacobsson

Talha Khan

Mohammad Mozaffari

Systems and methods to support Physical Uplink Shared Channel (PUSCH) multi-Transmission/Reception Point (TRP) scheduling are provided. In some embodiments, the wireless device performs one or more of: obtaining a configuration for Transmission Configuration Indicator (TCI) states for Uplink (UL) PUSCH scheduling; activating/deactivating a subset of configured TCI states). If two TCI states are indicated, the wireless device transmits two different PUSCHs each corresponding to one of the indicated TCI states. If one TCI state is indicated, the wireless device transmits a single PUSCH corresponding to the indicated TCI state. The wireless device maps indicated TCI states to the transmission occasions or actual repetitions is preconfigured via higher layer parameter(s) or is given by a predefined rule. The wireless device applies a Transmitted Precoding Matrix Indicator (TPMI) to transmission occasions or actual repetitions associated with each indicated TCI state based on a signaled value and/or a predefined value.

PUSCH multiple TRP reliability with UL TCI indication

Systems and methods for multiple Downlink Control Information (DCI) based Physical Downlink Shared Channel (PDSCH) scheduling are disclosed herein. In one embodiment, a method performed by a User Equipment (UE) comprises receiving first and second Physical Downlink Control Channels (PDCCHs) carrying first and second DCIs in first and second Control Resource Sets (CORESETs) in first and second time periods (t1, t2), respectively, wherein t1≤t2. The method further comprises receiving first and second PDSCHs scheduled by the first and second DCIs in third and fourth time periods (t3, t4), respectively, wherein the first and second PDSCHs are associated with a same Hybrid Automatic Repeat Request (HARQ) process and a same Transport Block (TB), and t3≤t4. The method further comprises sending first and second HARQ ACK/NACKs in first and second Physical Uplink Control Channel (PUCCH) resources in fifth and sixth time periods (t5, t6), respectively, wherein t5≤t6 and t4≤t5.

Multi-DCI based PDSCH scheduling for URLLC

A wireless device () and a method for enabling access to a radio network node () as well as a radio network node () and a method for enabling the wireless device () to enable access to the radio network node () are disclosed. The wireless device () supports a first transmission bandwidth. The radio network node () operates a carrier on a second transmission bandwidth. The first transmission bandwidth is narrower than the second transmission band width. The wireless device () obtains () information about the carrier. The wireless device () determines () a mapping scheme for mapping a set of enumerable elements, e.g. resource blocks or sequence elements, to frequency ranges based on the information about the carrier.

Network nodes and methods for enabling access to a radio network node

Systems and methods related to indicating starting symbols of multiple transmission occasions in a cellular communications system are disclosed. In one embodiment, a method performed by a wireless communication device includes receiving an indication of transmission occasions for respective downlink transmissions to the wireless communication device, at least two of the downlink transmissions associated to different transmission configuration indication states. The method further includes receiving an indication of a starting symbol and a length of a first transmission occasion of the transmission occasions and receiving an indication of a particular offset value that is to be applied for determining a starting symbol of a second transmission occasion of the transmission occasions. The method further includes determining a starting symbol of the second transmission occasion based on the starting symbol of the first transmission occasion, the length of the first transmission occasion, and the particular offset value.

Systems and methods for signaling starting symbols in multiple PDSCH transmission occasions

A method for repeating a Transport Block (TB) over multiple transmission occasions. The method includes exchanging specific signaling between a wireless device (e.g., a user equipment) and a network node (e.g., a base station) to repeat same or different redundancy versions of the TB in multiple non-overlapping transmission occasions (e.g., mini-slots) corresponding to multiple Transmission Configuration Indication (TCI) states and having different start positions. More specifically, the network node transmits a Time Domain Resource Allocation (TDRA) to indicate the multiple non-overlapping transmission occasions and the wireless device receives the TDRA indicating the multiple non-overlapping transmission occasions. Accordingly, the wireless device can receive repetition of the TB according to the TDRA. By indicating transmission occasions in the TDRA, it is possible to efficiently schedule multiple transmission occasions over the multiple TCI states, thus helping to improve efficiency, reliability, and coverage in a wireless communications network.

Method for repeating a transport block (TB) over multiple transmission/reception points (TRPs)

According to an aspect, a wireless node selects a set of reference signal antenna ports for use in transmitting data to other wireless nodes in a given transmit time interval, from a plurality of sets of reference signal antenna ports that are available for use and that include reference signal antenna ports having different reference signal densities in the frequency and/or time dimension. The wireless node sends a message to a second wireless node indicating a reference signal assignment and including an indication of the selected set of reference signal antenna ports.

Methods for adapting density of demodulation reference signals

Physical Uplink Shared Channel (PUSCH) resource allocation with multiple TRPs is provided. Embodiments described herein provide details to facilitate multi-Transmission/Reception Point (TRP) transmission on the PUSCH with respect to User Equipment (UE) implementation and application scenarios. A gap between consecutive PUSCH transmission instances toward different TRPs (e.g., transmission associated with different spatial transmission filters) can be signaled, either semi-statically or dynamically. In case of dynamic signaling, the gap may be configured in a Time Domain Resource Allocation (TDRA) table and indicated in Downlink Control Information (DCI). In case of semi-static signaling, it may be done by Radio Resource Control (RRC).

PUSCH resource allocation with multiple TRPs

Systems and methods are disclosed for single Control Resource Set (CORESET) based Physical Downlink Control Channel (PDCCH) diversity over multiple Transmission/Reception Points (TRPs). In one embodiment, a method performed by a wireless communication device comprises receiving a message(s) that activates first and second TCI states for a CORESET comprising first and second sets of resource elements (REs) associated to the first and second TCI states, respectively, and receiving a configuration of PDCCH candidates comprising PDCCH candidates for each of one or more aggregation levels (ALs) in a search space (SS) set. Each PDCCH candidate comprises REs in the first and second sets of REs. The method further comprises receiving a Downlink Control Information (DCI) carried by: (a) a single PDCCH in one PDCCH candidate or (b) first and second repetitions of a PDCCH in the first and second set of REs, respectively.

Single coreset based PDCCH diversity over multiple TRPs

A method, wireless device and network node are disclosed. According to one aspect, a method for a wireless device includes receiving a configuration of a reference signal resource set from the network node, the reference signal resource set being a set of single-symbol and single antenna port reference signal resources in at least one slot; and based on at least one parameter of the received configuration, determining whether the UE can assume a same antenna port for all reference signal resources of the reference signal resource set.

Methods and apparatuses for downlink tracking reference signal configuration

Systems and methods are disclosed herein for improving the reliability of a physical downlink control channel (PDCCH) transmission and reception. In one embodiment, a method performed by a wireless communication device for reception of PDCCH repetitions over multiple control resource sets (CORESETs) in a cellular communications system comprises receiving a configuration of a first CORESET and a second CORESET. The method further comprises receiving, from one or more network nodes, a first repetition of a PDCCH carrying downlink control information (DCI) in the first CORESET and a second repetition of the PDCCH carrying the same DCI in the second CORESET, wherein the first and second repetitions of the PDCCH have either: (a) different channel encoding or (b) a same channel encoding. The method further comprises decoding the DCI based on the first repetition of the PDCCH and/or the second repetition of the PDCCH.

PDCCH reliability enhancements with multiple TRPs

A method and apparatus are disclosed for rate matching. In one embodiment, a user equipment is configured to receive at least two physical downlink shared channels, PDSCHs; a first PDSCH of the at least two PDSCHs being associated with a first set of cell-specific reference signal, CRS, patterns and a second PDSCH of the at least two PDSCHs being associated with a second set of CRS patterns; and the at least two PDSCHs being rate matched around at least one of the first set of CRS patterns and the second set of CRS patterns. In another embodiment, a network node is configured to transmit the at least one PDSCH of at the least two PDSCHs; and the at least two PDSCHs being rate matched around at least one of the first set of CRS patterns and the second set of CRS patterns.

Rate matching for non-coherent joint-transmission with dynamic spectrum sharing

Systems and methods are disclosed herein for determining and indicating antenna ports in Downlink Control Information (DCI). In one embodiment, a method performed by a wireless communication device comprises receiving a configuration comprising a Demodulation Reference Signal (DMRS) configuration and an antenna port field configuration for an antenna port field in a Downlink Control Information (DCI) format. The method further comprises receiving a DCI of the DCI format and determining a size of an antenna port field and a DMRS port table for interpreting a value comprised in the antenna port field based on the DMRS and antenna port field configurations, the determined DMRS port table being a subset of a master DMRS port table. The method further comprises determining a DMRS port(s) used for a corresponding physical channel based on the size of the antenna port field, the DMRS port table, and/or the value of the antenna port field.

Systems and methods for determining and indicating antenna ports with configurable antenna port field in DCI

Radio network node, wireless device, and related methods are described. According to one aspect, when a first radio access technology and a second radio access technology are coexisting on the same carrier, the symbol location of the reference signals of the first radio access technology may be moved or changed when the reference signals of the first radio access technology collide with the reference signals of the second radio access technology.

Coexistence of reference signals in wireless communication networks

Systems and methods for determining Transmission Configuration Indication (TCI) states for multiple transmission occasions are provided. In some embodiments, a method performed by a wireless device includes: receiving a configuration including: a list of TCI states; a TCI activation command in activating a subset of the TCI states and mapping between each of the codepoints to activated TCI states; and a time threshold; receiving in a slot a scheduling message scheduling the transmission occasions; determining time offsets between receiving the scheduling message and each transmission occasion; determining a TCI state for each transmission occasion if at least one time offset is less than the time threshold; and receiving the transmission occasions with the determined TCI states. The proposed solutions ensure consistent UE behavior and allow for more robust PDSCH transmission over multiple TRPs.

Systems and methods for determining TCI states for multiple transmission occasions

A method for differentiating multiple Physical Downlink Shared Channel (PDSCH) transmission schemes for transmission of data for an over-the-top (OTT) service. In a non-limiting example, the PDSCH transmission schemes include a spatial multiplexing transmission scheme, a frequency multiplexing transmission scheme, a slot-based time multiplexing transmission scheme, and a mini-slot-based time multiplexing transmission scheme. In examples discussed herein, a User Equipment (UE) can be configured to differentiate the PDSCH transmission schemes based on information indicated in Downlink Control Information (DCI) for scheduling a PDSCH transmission, information signaled to the UE via a higher layer configuration, and/or capability signaling indicated from the UE to a network. By differentiating the PDSCH transmission schemes, the UE can efficiently receive a data transmission(s) from multiple Transmission/Reception Points (TRPs) to obtain user data from the OTT service.

Method for differentiating multiple physical downlink shared channel (PDSCH) transmission schemes

Growing community of inventors

Uppsala, Sweden

Mattias Frenne