公开(公告)号：US11336500B2

公开(公告)日：2022-05-17

申请号：US15735327

申请日：2016-06-24

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

Abstract: Methods and apparatus for initial cell search and selection using beamforming are described. An apparatus is configured with multiple receive beams and includes an antenna and a processor. The processor is operatively coupled to the antenna and sweeps a respective one of the multiple receive beams during each of multiple synchronization sub-frames, using a pre-defined sweep time and dwell period, to detect a synchronization signal. The processor also obtains symbol timing information and a synchronization signal index from the detected synchronization signal. The obtained synchronization signal index corresponds to a synchronization signal index of the set. The process decodes a first broadcast channel using the obtained symbol timing information, the obtained synchronization signal index and a predefined or blind-coded symbol distance between the detected synchronization signal and the first broadcast channel. The process decodes a second broadcast channel using information obtained from decoding the first broadcast channel.

公开(公告)号：US11233557B2

公开(公告)日：2022-01-25

申请号：US15769133

申请日：2016-11-10

Applicant: IDAC HOLDINGS, INC.

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

IPC: H04B7/08 ,  H04L5/00 ,  H04B7/06 ,  H04B7/0408 ,  H04B7/0417

Abstract: A wireless transmit/receive unit (WTRU) configured to perform wireless communications in higher frequency bands (e.g., above 6 GHz) using a fallback scheme is provided. The WTRU includes a receiver configured to receive, in a time transmission interval (TTI), at least one control signal and a first data signal using a first beam associated with a first beam identifier (ID) and a second data signal, subsequent to the first data signal, using a second beam associated with a second beam ID different from the first beam ID, such that one of the at least one control signal indicates the second beam ID; and a processor configured to switch a receive beam of the receiver from the first beam to the second beam based on the second beam ID to receive the second data signal.

公开(公告)号：US20210014847A1

公开(公告)日：2021-01-14

申请号：US17019127

申请日：2020-09-11

Applicant: IDAC HOLDINGS, INC.

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

IPC: H04W72/04

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：US10608858B2

公开(公告)日：2020-03-31

申请号：US16292991

申请日：2019-03-05

Applicant: IDAC HOLDINGS, INC.

Inventor： Erdem Bala ,  Mihaela C. Beluri ,  Kyle Jung-Lin Pan ,  Tao Deng ,  Liangping Ma ,  Yugeswar Deenoo ,  Ravikumar V. Pragada ,  Alphan Sahin

IPC: H04L27/26

Abstract: Methods and systems for operation in a wireless network are provided, the methods including receiving modulated data symbols and zeros in a frequency-domain, and mapping in the frequency-domain the modulated data symbols and zeros in an interleaved manner to sub-carriers within a resource allocation. The methods and systems further include generating a time-domain data signal based on the mapped sub-carriers, and generating a time domain cancellation signal by sign inverting and repeating a predetermined number of time-domain samples at a tail portion of the data signal. The methods and systems further include combining the time-domain data signal and the time domain cancellation signal to generate an exact zero tail data signal such that the exact zero tail data signal has a zero tail length equal to the predetermined number of time-domain samples, and transmitting the exact zero tail data signal.

公开(公告)号：US20190327622A1

公开(公告)日：2019-10-24

申请号：US16502758

申请日：2019-07-03

Applicant: IDAC Holdings, Inc.

Inventor： Onur Sahin ,  Samian Kaur ,  Philip J. Pietraski ,  Ravikumar V. Pragada ,  Douglas R. Castor ,  Arnab Roy

IPC: H04W24/02 ,  H04W48/16 ,  H04W16/28

Abstract: A cellular communications network may be configured to leverage a millimeter wave (mmW) mesh network. Base stations may be configured to operate as mmW base stations (mBs). Such base stations may be configured to participate in the mmW mesh network and to access the cellular communications network (e.g., via cellular access links). A network device of the cellular communications network (e.g., an eNB) may operate as a control entity with respect to one or more mBs. Such a network device may govern mesh backhaul routing with respect to the cellular communications network and the mmW mesh network. Such a network device may configure the mmW mesh network, for example by performing a process to join a new mB to the mmW mesh network. A WTRU may send and receive control information via a cellular access link and may send and receive data via the mmW mesh network.

公开(公告)号：US10397803B2

公开(公告)日：2019-08-27

申请号：US14400152

申请日：2013-05-10

Applicant: IDAC Holdings, Inc.

Inventor： Onur Sahin ,  Samian Kaur ,  Philip J. Pietraski ,  Ravikumar V. Pragada ,  Douglas R. Castor ,  Arnab Roy

IPC: H04W16/28 ,  H04W24/02 ,  H04W48/16 ,  H04W84/18

Abstract: A cellular communications network may be configured to leverage a millimeter wave (mmW) mesh network. Base stations may be configured to operate as mmW base stations (tnBs). Such base stations may be configured to participate in the mmW mesh network and to access the cellular communications network (e.g., via cellular access links). A network device of the cellular communications network (e.g., an eNB) may operate as a control entity with respect to one or more niBs. Such a network device may govern mesh backhaul routing with respect to the cellular communications network and the mmW mesh network. Such a network device may configure the mmW mesh network, for example by performing a process to join a new mB to the mmW mesh network. A WTRU may send and receive control information via a cellular access fink and may send and receive data via the mmW mesh network.

公开(公告)号：US10382992B2

公开(公告)日：2019-08-13

申请号：US14766044

申请日：2014-02-05

Applicant: IDAC HOLDINGS, INC.

Inventor： Onur Sahin ,  Arnab Roy ,  Yugeswar Deenoo ,  Ravikumar V. Pragada ,  Philip J. Pietraski ,  Joseph S. Levy ,  Tao Deng

IPC: H04W24/02 ,  H04W24/10 ,  H04W16/10 ,  H04W72/12 ,  H04W16/30 ,  H04B7/06 ,  H04W16/28 ,  H04W84/18

Abstract: Techniques may be used for interference measurement and management in directional mesh networks, including centralized and/or distributed approaches. A centralized node, such as an operations and maintenance (OAM) center, may use feedback from nodes in the mesh network to partition the nodes in the mesh network into clusters based on interference levels. Interference measurement reports may be used by the centralized node to update cluster membership. An initiating node in the mesh network may use topographical information to generate an initial interference cluster, and interference measurement frame (IMF) scheduling information may be used to schedule transmissions within the interference clusters. Techniques for opportunistic measurement campaigns, simultaneous measurement campaigns, link failure detection, and link re-acquisition in directional mesh networks may also be used.

公开(公告)号：US20190165890A1

公开(公告)日：2019-05-30

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 ,  H04B7/06 ,  H04L5/00 ,  H04W80/02 ,  H03M13/11 ,  H04L27/26

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：US10284407B2

公开(公告)日：2019-05-07

申请号：US15777761

申请日：2016-11-30

Applicant: IDAC HOLDINGS, INC.

Inventor： Erdem Bala ,  Mihaela C. Beluri ,  Kyle Jung-Lin Pan ,  Tao Deng ,  Liangping Ma ,  Yugeswar Deenoo ,  Ravikumar V. Pragada ,  Alphan Sahin

IPC: H04L27/30 ,  H04L27/26

Abstract: Methods and systems for operation in a wireless network are provided, the method including receiving modulated data symbols and zeros in a frequency-domain, and mapping in the frequency-domain the modulated data symbols and zeros in an interleaved manner to sub-carriers within a resource allocation. The method further includes generating a time-domain data signal based on the mapped sub-carriers, and generating a time domain cancellation signal by sign inverting and repeating a predetermined number of time-domain samples at a tail portion of the data signal. The method further includes combining the time-domain data signal and the time domain cancellation signal to generate an exact zero tail data signal such that the exact zero tail data signal has a zero tail length equal to the predetermined number of time-domain samples, and transmitting the exact zero tail data signal.

公开(公告)号：US10187840B2

公开(公告)日：2019-01-22

申请号：US14766370

申请日：2014-02-06

Applicant: IDAC HOLDINGS, INC.

Inventor： Ravikumar V. Pragada ,  Yugeswar Deenoo ,  Onur Sahin ,  Arnab Roy ,  Philip J. Pietraski

IPC: H04W40/16 ,  H04W40/12 ,  H04W28/02 ,  H04W40/24 ,  H04W72/12 ,  H04W84/18

Abstract: A method and apparatus for joint routing and distributed scheduling in a directional mesh network includes receiving feedback for multiple candidate paths from at least one neighbor node, Semi-static and instantaneous metrics are determined based upon the received feedback. Routing from a first node to a destination node is determined based upon the semi-static and instantaneous metrics, and a transmission is routed in accordance with the determined route from the first node to the destination node.