公开(公告)号：US20220286187A1

公开(公告)日：2022-09-08

申请号：US17751356

申请日：2022-05-23

Applicant: IDAC HOLDINGS, INC.

Inventor： Yugeswar Deenoo ,  Tao Deng ,  Janet A. Stern-Berkowitz ,  Moon-il Lee ,  Mihaela C. Beluri ,  Ravikumar V. Pragada

IPC: H04B7/06 ,  H04B7/08 ,  H04L5/00

Abstract: Methods and apparatus are described. A method, implemented in a wireless transmit/receive unit (WTRU) includes monitoring a first control channel search space (SS) associated with a first normal beam set comprising a first beam set. The WTRU initiates extended monitoring and monitors, subsequent to a trigger based on a measurement by the WTRU, a control channel SS associated with an extended beam set comprising the first beam set and one or more additional beam sets. The WTRU determines a second beam set from the extended beam set. The determination is based on a received control channel beam switch command or based on a control channel SS in which a beam switch command is received. The WTRU monitors a second control channel SS associated with a second normal beam set comprising the determined second beam set.

公开(公告)号：US11382136B2

公开(公告)日：2022-07-05

申请号：US16582305

申请日：2019-09-25

Applicant: IDAC Holdings, Inc.

Inventor： Tao Deng ,  Philip J. Pietraski ,  Ravikumar V. Pragada ,  Yugeswar Deenoo ,  Janet A. Stern-Berkowitz ,  Moon-il Lee ,  Mihaela C. Beluri ,  Kyle Jung-Lin Pan

IPC: H04W4/00 ,  H04W74/08 ,  H04B7/06 ,  H04W72/04 ,  H04W74/00 ,  H04L5/00 ,  H04L27/26 ,  H04W24/08 ,  H04W24/10 ,  H04W72/14 ,  H04W52/14 ,  H04W80/02

Abstract: Methods, devices and systems are provided for performing a random access (RA) procedure. A wireless transmit/receive unit (WTRU) may be configured to receive RA resource sets, where each of the RA resource sets is associated with a node-B directional beam, select an RA resource set from among the RA resource sets, and initiate an RA procedure based on the selected RA resource set. The RA procedure may include selecting multiple preambles which include a preamble for each resource of a plurality of resources corresponding to the selected RA resource set. The WTRU may be configured to sequentially transmit the selected multiple preambles in sequential RA transmissions, and may be configured to receive, from a node-B, in response to the RA transmissions, at least one RA response (RAR), where each of the received at least one RAR corresponds to one of the transmitted multiple preambles.

公开(公告)号：US11108500B2

公开(公告)日：2021-08-31

申请号：US16315234

申请日：2017-07-01

Applicant: IDAC Holdings, Inc.

Inventor： Philip J. Pietraski ,  Arnab Roy ,  Kyle Jung-Lin Pan ,  Alpaslan Demir ,  Muhammad U. Fazili ,  William E. Lawton ,  Mohamed Abou El Seoud ,  Kevin T. Wanuga ,  Ravikumar V. Pragada

IPC: H04L1/00 ,  H04L12/801 ,  H04L12/851 ,  H04L12/841 ,  H03M13/11 ,  H04B7/06 ,  H04L5/00 ,  H04L27/26 ,  H04W80/02 ,  H04W28/02

Abstract: Latency reduction by fast forward (FF) in multi-hop communication device and/or systems is disclosed. Packets may be received and forwarded using a codeword (CW)-based approach with and/or without per-CW CRC. A FF session may have a flow ID and packets may have sequence numbers. Packets targeted for FF may be divided into independently decodable CWs that may be transmitted in the next hop, for example, as soon as the destination is determined without waiting for an entire packet's arrival and/or for CRC verification. Low latency (e.g. FF) traffic may be indicated. CW-based FF may be extensible for an e2e RAN path from a WTRU to the last access node in a RAN. Intermediate metrics, a packet CRC and/or a per-CW CRC may be utilized for data integrity. HARQ and/or CW retransmission procedures may be implemented between network nodes for error handling.

公开(公告)号：US20190081688A1

公开(公告)日：2019-03-14

申请号：US16081491

申请日：2017-03-02

Applicant: IDAC HOLDINGS, INC.

Inventor： Yugeswar Deenoo ,  Tao Deng ,  Janet A. Stern-Berkowitz ,  Moon-il Lee ,  Mihaela C. Beluri ,  Ravikumar V. Pragada

IPC: H04B7/06 ,  H04B7/08 ,  H04L5/00

Abstract: Methods and apparatus are described. A method, implemented in a wireless transmit/receive unit (WTRU) includes monitoring a first control channel search space (SS) associated with a first normal beam set comprising a first beam set. The WTRU initiates extended monitoring and monitors, subsequent to a trigger based on a measurement by the WTRU, a control channel SS associated with an extended beam set comprising the first beam set and one or more additional beam sets. The WTRU determines a second beam set from the extended beam set. The determination is based on a received control channel beam switch command or based on a control channel SS in which a beam switch command is received. The WTRU monitors a second control channel SS associated with a second normal beam set comprising the determined second beam set.

公开(公告)号：US10172135B2

公开(公告)日：2019-01-01

申请号：US15302721

申请日：2015-04-09

Applicant: IDAC Holdings, Inc.

Inventor： Tao Deng ,  Yugeswar Deenoo ,  Philip J. Pietraski ,  Ravikumar V. Pragada

IPC: H04W72/04 ,  H04W72/12 ,  H04W84/04

Abstract: A wireless transmit/receive unit (WTRU) (e.g., a millimeter WTRU (mWTRU)) may receive a first control channel using a first antenna pattern. The WTRU may receive a second control channel using a second antenna pattern. The WTRU may demodulate and decode the first control channel. The WTRU may demodulate and decode the second control channel. The WTRU may determine, using at least one of: the decoded first control channel or the second control channel, beam scheduling information associated with the WTRU and whether the WTRU is scheduled for an mmW segment. The WTRU may form a receive beam using the determined beam scheduling information. The WTRU receive the second control channel using the receive beam. The WTRU determine, by demodulating and decoding the second control channel, dynamic per-TTI scheduling information related to a data channel associated with the second control channel.

公开(公告)号：US09781738B2

公开(公告)日：2017-10-03

申请号：US14766696

申请日：2014-02-06

Applicant: IDAC HOLDINGS, INC.

Inventor： Philip J. Pietraski ,  Tao Deng ,  Onur Sahin ,  Ravikumar V. Pragada

IPC: H04W72/12 ,  H04W72/04 ,  H04B7/155 ,  H04L5/00 ,  H04W88/08

CPC classification number: H04W72/1263 ,  H04B7/155 ,  H04L5/0044 ,  H04L5/0053 ,  H04L5/0091 ,  H04W72/0426 ,  H04W72/046 ,  H04W72/1289 ,  H04W88/08

Abstract: A method and apparatus are disclosed for establishing a low latency millimeter wave (mmW) backhaul connection. A base station may receive a mmW relay schedule from an evolved Node B (eNB) within one Long Term Evolution (LTE) scheduling interval. The base station may decode the mmW relay schedule, and initialize a mmW radio transmission resource according to the mmW relay schedule. The base station may receive a data packet from a second base station in a mmW transmission time interval (TTI) based on the mmW relay schedule using the initialized mmW radio transmission resource, and may transmit the data packet to a third base station based on the mmW relay schedule using the initialized mmW radio transmission resource. The transmitting may begin before the reception of the data packet is complete.

公开(公告)号：US20170223552A1

公开(公告)日：2017-08-03

申请号：US15488146

申请日：2017-04-14

Applicant: IDAC Holdings, Inc.

Inventor： Arnab Roy ,  Ravikumar V. Pragada ,  Philip J. Pietraski ,  Bharath Viswanathan

IPC: H04W16/28 ,  H04W64/00 ,  H04W24/08

CPC classification number: H04W16/28 ,  H04B7/0695 ,  H04B7/088 ,  H04W24/08 ,  H04W36/0083 ,  H04W36/0094 ,  H04W36/30 ,  H04W64/00 ,  H04W64/003 ,  H04W72/048 ,  H04W72/085 ,  H04W88/08

Abstract: A method and apparatus for improving and performing mmW beam tracking is disclosed. Localization methods to improve prediction of the position of a WTRU are described, which may allow a millimeter wave base station (mB) to appropriately select a modified beam and to perform more efficient handover. WTRUs may report directional signal strength measurements to mBs, which may then be used to generate a directional radio environment map (DREM) for use in identifying secondary links to use when a primary link fails. Additional localization techniques using internal/external information for prediction are described. Historical data use and the use of data obtained from mB-mB cooperation including feedback information and reference signaling information are also described. Methods for beam tracking for directional relays and initial beam training optimization are described as well. Finally, WTRU localization precision improvement, beamwidth adaptation, and assisted beam tracking and handover methods are also described.

公开(公告)号：US11595953B2

公开(公告)日：2023-02-28

申请号：US17073146

申请日：2020-10-16

Applicant: IDAC Holdings, Inc.

Inventor： Yugeswar Deenoo ,  Tao Deng ,  Kyle Jung-Lin Pan ,  Moon-il Lee ,  Ravikumar V. Pragada ,  Janet A. Stern-Berkowitz ,  Mihaela C. Beluri

IPC: H04W72/04 ,  H04L5/00 ,  H04W72/044

Abstract: Transmit and/or receive beamforming may be applied to the control channel transmission/reception, e.g., in mmW access link system design. Techniques to identify candidate control channel beams and/or their location in the subframe structure may provide for efficient WTRU operation. A framework for beam formed control channel design may support varying capabilities of mBs and/or WTRUs, and/or may support time and/or spatial domain multiplexing of control channel beams. For a multi-beam system, modifications to reference signal design may discover, identify, measure, and/or decode a control channel beam. Techniques may mitigate inter-beam interference. WTRU monitoring may consider beam search space, perhaps in addition to time and/or frequency search space. Enhancements to downlink control channel may support scheduling narrow data beams. Scheduling techniques may achieve high resource utilization, e.g., perhaps when large bandwidths are available and/or WTRUs may be spatially distributed.

公开(公告)号：US20220338270A1

公开(公告)日：2022-10-20

申请号：US17857486

申请日：2022-07-05

Applicant: IDAC Holdings, Inc.

Inventor： Tao Deng ,  Philip J. Pietraski ,  Ravikumar V. Pragada ,  Yugeswar Deenoo ,  Janet A. Stern-Berkowitz ,  Moon-il Lee ,  Mihaela C. Beluri ,  Kyle Jung-Lin Pan

IPC: H04W74/08 ,  H04B7/06 ,  H04W72/04 ,  H04W74/00 ,  H04L5/00 ,  H04L27/26 ,  H04W24/08 ,  H04W24/10 ,  H04W72/14

Abstract: Methods, devices and systems are provided for performing a random access (RA) procedure. A wireless transmit/receive unit (WTRU) may be configured to receive RA resource sets, where each of the RA resource sets is associated with a node-B directional beam, select an RA resource set from among the RA resource sets, and initiate an RA procedure based on the selected RA resource set. The RA procedure may include selecting multiple preambles which include a preamble for each resource of a plurality of resources corresponding to the selected RA resource set. The WTRU may be configured to sequentially transmit the selected multiple preambles in sequential RA transmissions, and may be configured to receive, from a node-B, in response to the RA transmissions, at least one RA response (RAR), where each of the received at least one RAR corresponds to one of the transmitted multiple preambles.

公开(公告)号：US20220278885A1

公开(公告)日：2022-09-01

申请号：US17746680

申请日：2022-05-17

Applicant: IDAC Holdings, Inc.

Inventor： Tao Deng ,  Steven Ferrante ,  Ravikumar V. Pragada ,  Yugeswar Deenoo ,  Daniel R. Cohen ,  Janet A. Stern-Berkowitz ,  Moon-il Lee ,  Mihaela C. Beluri

IPC: H04L27/26 ,  H04W48/12 ,  H04W48/16 ,  H04B7/06 ,  H04B7/08 ,  H04W56/00

Abstract: A method performed by a base station may include transmitting a configuration message including at least information indicating a subset of a plurality of transmit beams to be used for transmitting a set of synchronization signals. The set of synchronization signals including a primary synchronization signal and a secondary synchronization signal may be transmitted. A random access channel (RACH) transmission may be received using a receive beam associated with one of the subset of the plurality of transmit beams used by the base station to transmit the set of synchronization signals. The transmitted set of synchronization signals transmitted may have a signal quality above a signal quality threshold. A reference signal may be transmitted along with a physical broadcast channel (PBCH) transmission. The reference signal may have a sequence derived from a beam index associated with the one of the subset of the plurality of transmit beams.