Interdigital Patent Holdings, Inc.

Idac Holdings, Inc.

Sony Corporation

J Patrick Tooher

Paul Marinier

Ghyslain Pelletier

Marian Rudolf

Moon-il Lee

Janet A Stern-Berkowitz

Pouriya Sadeghi

Benoit Pelletier

Diana Pani

Tao Deng

Shahrokh Nayeb Nazar

Virgil Comsa

Aata El Hamss

Faris Alfarhan

Pascal M Adjakple

Nobuyuki Tamaki

Martino M Freda

Afshin Haghighat

Ulises Olvera-Hernandez

Mahmoud Watfa

Stephen E Terry

Yugeswar Deenoo

Guodong Zhang

Allan Yingming Tsai

Lujing Cai

Mihaela C Beluri

Samian Kaur

Alpaslan Demir

Sanjay Goyal

Mouna Hajir

Li-Hsiang Sun

Behrouz Aghili

Arnab Roy

Jiaxin Yang

Christopher R Cave

Peter Shaomin Wang

Loic Canonne-Velasquez

Yan Li

Dylan James Watts

Lorenza Giupponi

Sandra Lagén Morancho

Biljana Bojović

Oghenekome Oteri

Tuong Duc Hoang

Muhammad U Fazili

Ananth Kini

Kevin T Wanuga

Nazli Khan Beigi

Scott M Newton

Phuong Luong

Moon-iI Lee

Moon-Il Lee

Pascal M Adjapkle

Systems, methods, and instrumentalities are disclosed for LTE operation in an unlicensed spectrum (LTE-U). A wireless transmit/receive unit (WTRU) may establish a connection with a first cell on a licensed frequency band. The WTRU may receive a first downlink transmission from a second cell operating on an unlicensed frequency band. The WTRU may determine that a synchronization signal transmission from a third cell operating on the unlicensed frequency band is transmitted using one or more resource elements. The WTRU may perform frequency and/or timing estimation based on the synchronization signal transmission. The WTRU may perform rate matching around the one or more resource elements that correspond to the synchronization signal transmission. The WTRU may perform rate matching around the one or more resource elements by de-mapping symbols of the downlink transmission.

Channel usage indication and synchronization for LTE operation in unlicensed bands

Methods and apparatuses are described herein for reporting channel failure, and may be used, among others, for New Radio (NR) operation in unlicensed spectrum (NR-U). Upon detecting a consistent uplink (UL) listen-before-talk (LBT) failure or upon detecting a beam failure on a cell, a Scheduling Request (SR) may be triggered to have a UL resource granted for transmission of the failure to another cell, or to a subset of other cells, using, for example, a failure recovery Medium Access Control-Control Element (MAC-CE). If no grant of an available UL resource can be obtained for transmission of the MAC-CE, or the grant is not suitable for the failure reporting, a failure recovery SR may be transmitted repeatedly to obtain an UL grant suitable for transmitting the failure report. In some cases, a WTRU may initiate a random-access procedure for transmitting the MAC-CE, for example when resources for failure reporting are not configured.

Method for reporting channel failure

Embodiments contemplate wireless transmit/receive unit (WTRU) transmissions of different types of uplink channels and/or signals in a system deployment where multiple destination points may exist. Some embodiments contemplate that a WTRU may select the destination point of a transmission on a dynamic basis. In one or more systems where destination point selection from among multiple potential destination points may be possible for a WTRU transmission, some embodiments contemplate the determination of the handling of hybrid automatic repeat request (HARQ) retransmissions and for different power headroom reporting mechanisms. Embodiments also contemplate the reduction and/or inhibition of WTRU transmissions to destination points to which the WTRU may have lost connectivity.

Multipoint transmission in wireless communication

Methods and apparatuses for accessing a wireless network are provided herein. A method according to at least one embodiment includes receiving a transmission including system information indicating a random access channel (RACH) configuration. The RACH configuration may indicate one or more RACH occasions and one or more preambles, each of the RACH occasions associated with at least one of the one or more preambles. The method may include receiving one or more reference signals and transmitting one of the preambles in a RACH occasion that is associated with the transmitted preamble. The transmitted preamble may be selected for transmission based on a measurement of the received one or more reference signals, and wherein the transmitted preamble is transmitted using beamforming parameters derived based on the received one or more reference signals.

Method and apparatus for accessing a wireless network

Systems, apparatuses, and methods are disclosed for receiving downlink control information (DCI) that may include an indication of a reference measurement resource (RMR), receiving an indication of a measurement configuration, and receiving an indication of a feedback resource configuration. A measurement report based on the indication of an RMR, an indication of a measurement configuration, and an indication of a feedback resource configuration may be generated and may be transmitted to a network device.

Systems and methods for reference signal measurements in wireless systems

Techniques for uplink power control (e.g., for New Radio (NR)) are disclosed. A wireless transmit/receive unit (WTRU) may determine that the WTRU is to perform a first and a second transmissions using a first and a second transmission beams. The WTRU may determine an uplink transmission power for one or more of the first or second transmissions. For example, if the angular separation of the first and the second transmission beams is greater than a first separation threshold, the WTRU may determine the uplink transmission power having a first maximum power level parameter and a second maximum power level parameter. If the angular separation of the first and the second transmission beams is less than a second separation threshold, the WTRU determine the uplink transmission power having a shared maximum power level parameter. The WTRU may transmit the first and second transmissions using the first and second transmission beams, respectively.

Uplink power control

A wireless transmit/receive unit (WTRU) may monitor LBT subbands to determine when a COT is activated. A WTRU may vary monitoring based on whether the WTRU received a full or partial COT structure. A WTRU may interpret a scheduling grant based on the set of acquired LBT subbands. A WTRU may determine a channel access priority (CAP) associated with a COT. A WTRU may indicate a CAP used to acquire a COT. A WTRU may receive an indication of a CAP used by a network to start a COT. A WTRU may determine a logical channel restriction based on a CAP associated with the COT. A WTRU may determine whether a logical channel may be included in a transmission during a COT based on a logical channel restriction. A transmission may be during a COT via a subband(s).

Shared channel occupancy time operation

Systems, methods, and instrumentalities are disclosed for uplink (UL) transmissions in wireless systems. The systems, methods and instrumentalities may include a wireless transmit/receive unit (WTRU) with a receiver configured to receive one or more uplink (UL) grants that may include allocations associated with a regular UL (RUL) carrier and a supplementary UL (SUL) carrier. The RUL and SUL carriers may be associated with a common downlink (DL) carrier of a serving cell. The WTRU may include a processor configured to select data from one or more logical channels for transmission in accordance with the allocations. The WTRU may include a transmitter configured to transmit data from one logical channel on the RUL carrier and to transmit data from another logical channel on the SUL carrier in accordance with the allocations.

Supplementary uplink transmissions in wireless systems

Methods, apparatus and systems for enabling interference avoidance, for example from self and neighboring interference are disclosed. In one representative method implemented in a Wireless Transmit/Receive Unit (WTRU) using time-frequency (TF) resources in first and second directions, the method includes comprising TF resource muting or symbol muting, by the WTRU, one or more TF resources for communication in the first direction based on information associated with a communication in the second direction or subframe shortening, by the WTRU, by one or more TF resources for communication in the first direction based on information associated with a communication in the second direction.

Methods, apparatus and systems for interference management in a full duplex radio system

A receiver bandwidth adaptation for radio access technologies (RATs) may be for a New Radio (NR) or 5G flexible RAT. A WTRU control channel (e.g., receiver) bandwidth may change, for example, based on monitoring a downlink channel for an indication using a bandwidth (BW) associated with a first BW configuration. The indication may include a signal to change the receiver BW. The WTRU may change the receiver BW associated with the first BW configuration to a second BW configuration when the WTRU receives the indication on a downlink (DL) channel. The WTRU may perform one or more measurements associated with the second BW configuration in response to the change of the receiver BW to the second BW configuration. The WTRU may transmit measurement information to a network entity. The WTRU may receive a DL transmission from the network using the second BW configuration.

Receiver bandwidth adaptation

Devices and techniques for determining a transmission time interval (TTI) duration and/or varying the TTI duration are contemplated. The TTI duration may be varied based on one or more of: the timing a transmission, the amount of data available for transmission, or the type of data to be transmitted. The TTI duration may be for one or more of: the Enhanced Physical Downlink Control Channel (EPDCCH), the Physical Downlink Shared Channel (PDSCH), and/or the Physical Uplink Control Channel (PUCCH). One or more different TTI durations may be achieved by modifying OFDM symbols per TTI and/or symbol duration (e.g., subcarrier spacing). One or more variable time-slot boundaries are contemplated. TTI duration per set of subcarriers is contemplated. One or more timing rules to deal with different processing time(s) are contemplated.

Systems and methods of operating with different transmission time interval (TTI) durations

Method and apparatuses for communication over an unlicensed band are provided herein. A method may comprise transmitting transport blocks in each slot of a plurality of slots and determining a Hybrid Automatic Repeat Request (HARQ) status for each of the transmitted transport blocks. The method may further comprise determining a weighting coefficient for each of the determined HARQ statuses and calculating, based on the determined HARQ statuses and weighting coefficients, a weighted average of the HARQ statuses for the transmitted transport blocks. The method may further comprise adjusting a Listen-Before-Talk (LBT) contention window size based on the calculated weighted average of the HARQ statuses.

Methods for contention window size adjustment in unlicensed spectrum

A method implemented by a Wireless Transmit/Receive Unit (WTRU) includes receiving a DeModulation Interference Measurement (DM-IM) resource, determining an interference measurement based on the DM-IM resource, and demodulating a received signal based on the interference measurement. An interference is suppressed based on the interference measurement. At least one DM-IM resource is located in a Physical Resource Block (PRB). The DM-IM resource is located in a PRB allocated for the WTRU. The DM-IM resource is a plurality of DM-IM resources which form a DM-IM pattern, and the DM-IM pattern is located on a Physical Downlink Shared Channel (PDSCH) and/or an enhanced Physical Downlink Shared Channel (E-PDSCH) of at least one Long Term Evolution (LTE) subframe. The DM-IM resources are different for different Physical Resource Blocks (PRB) in the LTE subframe. The DM-IM is located in a Long Term Evolution (LTE) Resource Block (RB), and the DM-IM pattern is adjusted.

Methods, systems and apparatuses for network assisted interference cancellation and/or suppression (NAICS) in long-term evolution (LTE) systems

Techniques for efficient downlink control with a large number of carriers and/or TTis are described. Techniques for blind decoding reduction may include making the search space and/or aggregation level of candidates for a first PDCCH/E-PDCCH associated with the characteristics of a second received PDCCH/E-PDCCH. Techniques may include embedding DCI for a set of serving cells and/or TTis in a PDSCH. DCI for a set of serving cells and/or TTis may be included in single PDCCH/E-PDCCH. To reduce overhead, carrier indicator field interpretation may be associated with the serving cell or TTI from which the PDCCH/E-PDCCH containing the downlink control information is received, or the group of cells or TTis to which the PDCCH/E-PDCCH containing the downlink control information belongs.

Downlink control signaling

Methods, systems and apparatuses for operation in long-term evolution (LTE) systems are provided, including a method implemented in a base station that may include receiving, from a wireless transmit/receive unit (WTRU) via a first interface, a first message including radio capability information associated with the WTRU; transmitting, to a mobility management entity (MME) via a second interface, a second message including the radio capability information; receiving, from the MME via the second interface, a paging message including the radio capability information; and determining whether to page the WTRU in idle mode based on the radio capability information. Also provided is another method implemented by a WTRU in a vicinity of a dormant cell. This method may include any of: receiving, from a dormant cell, a signal; receiving, from a serving cell, a trigger to initiate measurement of one or more dormant cells; and measuring the signal.

Methods, systems and apparatuses for operation in long-term evolution (LTE) systems

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Montreal, Canada

J Patrick Tooher