Telefonaktiebolaget Lm Ericsson (publ)

Blackberry Corporation

Siva Dharshan Muruganathan

Shiwei Gao

Mattias Frenne

Robert Mark Harrison

Sebastian Faxér

Stephen J Grant

Xingqin Lin

Yufei W Blankenship

Helka-Liina Määttänen

Yi Song

Helka-Liina Määttanen

Zhenhua Zou

Simon Järmyr

Hua Xu

Yongkang Jia

Jianwei Zhang

Vahid Pourahmadi

Bo Lincoln

Florent Munier

Tarik Tabet

Sebastian FAXÉR

Robert Novak

Claes Tidestav

Zhang Zhang

Lars Lindbom

William Anthony Gage

Biswaroop Mukherjee

Jonas Sedin

Vijaya Yajnanarayana

Robert Baldemair

George Jöngren

Mattias Andersson

Hazhir Shokri Razaghi

Zhijun Cai

Andreas Nilsson

Chandra Sekhar Bontu

Mats Folke

Ying Sun

Kittipong Kittichokechai

Björn Hofström

Magnus Hurd

Talha Khan

Robert Mark Harrsion

Iana Siomina

Jinhua Liu

Yi-Pin Eric Wang

Min Wang

Fredrik Athley

Mattias Bergström

Olof Liberg

Jonas Fröberg Olsson

Yutao Sui

Laetitia Falconetti

Niklas Wernersson

Henrik Rydén

Ritesh Shreevastav

Magnus Sandgren

Masoud Ebrahimi Tazeh Mahalleh

Attila Takács

Stefania Sesia

Per Ernström

Sebastian Euler

Bikramjit Singh

Helka-Liina Maattanen

Erik Stare

Deep Shrestha

Xinlin Zhang

Mark Harrison

Yazid Lyazidi

Sebastian Faxer

Sebastian Faxé

Tank Tabet

Yufei Wu Blankenship

Helka-Liina MÄÄTTANEN

Xiaolin Jiang

Mattias BERGSTRÖM

Helka-Liina MÄÄTTÄNEN

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)

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

Systems and methods of the present disclosure are directed to a method performed by a wireless communication device. The method includes receiving, from a network node, information that configures the wireless communication device for a Configured Grant (CG) based Physical Uplink Shared Channel (PUSCH) transmission with PUSCH repetitions towards two or more transmissions/reception points (TRPs). The method includes performing the CG based PUSCH transmission with PUSCH repetitions towards the multiple TRPs in accordance with the received information.

Configured grant based PUSCH transmission to multiple TRPs

Indication of Transmission Configuration Indication (TCI) states for aperiodic Channel State Information-Reference Signal (CSI-RS) with low configuration overhead is provided. More specifically, methods performed by a wireless device(s) and a base station(s) for indicating a configuration parameter(s) for triggering aperiodic CSI-RS are provided. The methods disclosed herein make it possible for triggering aperiodic CSI-RS with multiple options (e.g., any of indicated TCI states and/or Quasi Co-Located relationships). As a result, it is possible to significantly reduce configuration overhead related to indicating aperiodic CSI-RS.

Indication of TCI states for aperiodic CSI-RS with low configuration overhead

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

Methods and apparatuses provide a mechanism to account for timing errors of a wireless device () in positioning measurements. In one example, a wireless device () performs reference-signal transmissions or measurements and sends information to a network node () that is involved in positioning of the wireless device (). The information indicates associations of the reference-signal transmissions or measurements with respective timing groups of the wireless device (). Each timing group represents a related set of transmission or reception timing errors within the wireless device (). Based on the information, the network node () accounts for the different timing-group associations when performing positioning calculations that are based on the reference-signal transmissions or measurements performed by the wireless device ().

Methods and apparatuses to account for timing errors of a user equipment in positioning measurements

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

Systems and methods for implicitly activating one or more Transmission Configuration Indicator (TCI) states are provided. In some embodiments, a method performed by a wireless communication device for implicit TCI state activation includes sending a measurement report for one or more reference signals to a base station. The one or more reference signals are related to one or more TCI states, respectively. The method further includes activating at least one TCI state from among the one or more TCI states that are related to the one or more reference signals. In this way, the TCI state selection may be expedited and simplified because additional Medium Access Control (MAC) Control Element (CE) activation message may be avoided.

Implicit update of activated TCI states

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

Methods for scheduling mixed type traffics via multiple Transmission/Reception Points (TRPs) are provided. In embodiments disclosed herein, a base station provides, and a wireless device receives, a scheduling information for scheduling the mixed type traffics with different Quality of Service (QoS) requirements via multiple TRPs. In a non-limiting example, the mixed type traffics include an enhanced Mobile Broadband (eMBB) service and an Ultra-Reliable and Low Latency Communication (URLLC) traffic service, and the scheduling information can be conveyed in a single Downlink Control Information (DCI) or a pair of DCIs. As such, it is possible to enable efficient scheduling of both eMBB traffic and URLLC traffics simultaneously. As a result, it is possible to satisfy a reliability requirement of the URLLC service without sacrificing spectral efficiency and/or throughput of the eMBB service.

Multi TRP based scheduling of mixed type traffics

Systems and methods for Phase Tracking Reference Signal (PTRS) to Demodulation Reference Signal (DMRS) association when two or more Transmission Configuration Indication (TCI) states are indicated for a Physical Downlink Shared Channel (PDSCH) transmission in a cellular communications system are disclosed. In one embodiment, a method performed by a WCD comprises receiving a Physical Downlink Control Channel (PDCCH) comprising Downlink Control Information (DCI) that indicates two Transmission Configuration Indication (TCI) states for a PDSCH transmission to the WCD and DMRS ports within a single Code Division Multiplexing (CDM) group. The method further comprises determining a PTRS port to DMRS port association for the PDSCH transmission, wherein a single PTRS port is used for the PDSCH transmission and determining the PTRS port to DMRS port association comprises determining that the single PTRS port is associated with a lowest indexed DMRS port in the DMRS ports indicated in the DCI.

PTRS to DMRS port association

A method for a UE in a multiple transmission points communication system, mTRP, scheme, is provided. The method includes receiving downlink control information, DCI, indicating at least two transmission points scheme for a scheduled data transmission on physical resource blocks, PRBs. The PRBs includes at least a first subsets of PRBs, associated with a first transmission point, and a second subset of PRBs, associated with a second transmission point. The method further includes determining a first PT-RS frequency density for the first set of PRBs based on the number of PRBs in the first set of PRBs and a second PT-RS frequency density based on the number of PRBs in the second set of PRBs. A UE, methods for a base station and a base station are also provided.

Determining phase tracking reference signals in multiple transmission points

Growing community of inventors

Kanata, Canada

Siva Dharshan Muruganathan