公开(公告)号：US20240283691A1

公开(公告)日：2024-08-22

申请号：US18651889

申请日：2024-05-01

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Mostafa Sayed Ibrahim ,  Il Han Kim ,  Tarkesh Pande ,  Anuj Batra

IPC: H04L27/26 ,  H04B3/54 ,  H04B7/0413 ,  H04L1/1867 ,  H04L5/00 ,  H04L7/04 ,  H04W74/0816

CPC classification number: H04L27/2656 ,  H04B3/54 ,  H04B3/542 ,  H04B3/546 ,  H04B7/0413 ,  H04L5/0023 ,  H04L7/042 ,  H04L27/26 ,  H04L27/2602 ,  H04L27/2603 ,  H04L27/2613 ,  H04L27/2655 ,  H04L27/2663 ,  H04W74/0816 ,  H04L1/188

Abstract: A PLC network system and method operative with OFDM for generating MIMO frames with suitable preamble portions configured to provide backward compatibility with legacy PLC devices and facilitate different receiver tasks such as frame detection and symbol timing, channel estimation and automatic gain control (AGC), including robust preamble detection in the presence of impulsive noise and frequency-selective channels of the PLC network. A PLC device may include a delayed correlation detector and a cross-correlation detector operating in concert to facilitate preamble detection in one implementation.

公开(公告)号：US11831744B2

公开(公告)日：2023-11-28

申请号：US18148024

申请日：2022-12-29

Applicant: Texas Instruments Incorporated

Inventor： Anand G. Dabak ,  Badri N Varadarajan ,  Il Han Kim ,  Tarkesh Pande

IPC: H04L69/22 ,  H04B3/30 ,  H04B10/11 ,  H04B3/54 ,  H04B1/69

CPC classification number: H04L69/22 ,  H04B3/30 ,  H04B3/54 ,  H04B3/542 ,  H04B10/11 ,  H04B2001/6912

Abstract: Methods for building, transmitting, and receiving frame structures in power line communications (PLC) are described. Various techniques described herein provide a preamble design using one or more symbols. One or more preamble symbols may be interspersed within a header portion of a PLC frame to facilitate estimation of a frame boundary and/or sampling frequency offset, for example, in the presence of impulsive noise.

公开(公告)号：US11632672B2

公开(公告)日：2023-04-18

申请号：US16730485

申请日：2019-12-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Feng L. Mo ,  Jianwei Zhou ,  Xiaolin Lu ,  Il Han Kim ,  Kaichien Tsai

IPC: H04W12/041 ,  H04W12/03 ,  H04W40/24 ,  H04L9/08 ,  H04L45/02 ,  H04L45/00

Abstract: A multi-hop mesh network includes a root network device and a first network device. The first network device is configured to establish a first direct wireless connection with the root network device and negotiate a first shared secret key with the root network device. The multi-hop network further includes a second network device configured to establish a second direct wireless connection with the first network device and negotiate a second shared secret key with the first network device.

公开(公告)号：US11456772B2

公开(公告)日：2022-09-27

申请号：US17035891

申请日：2020-09-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ariton E. Xhafa ,  Xiaolin Lu ,  Janwei Zhou ,  Il Han Kim

IPC: H04B1/00 ,  H04B1/7156 ,  H04L9/40 ,  H04L9/06 ,  H04W12/037 ,  H04W12/0471 ,  H04B1/713

Abstract: A network includes a first wireless node that communicates over a wireless network connection. The first wireless node includes a first encryption engine that processes a first initialization data set and a current transmit sequence associated with a current communication to generate a next transmit sequence that is employed to communicate with a second wireless node that derives a next received sequence that corresponds to the next transmit sequence to process a subsequent communication.

公开(公告)号：US11452071B2

公开(公告)日：2022-09-20

申请号：US16175594

申请日：2018-10-30

Applicant: Texas Instruments Incorporated

Inventor： Wonsoo Kim ,  Il Han Kim ,  Jianwei Zhou

IPC: H04W72/12 ,  H04W72/00 ,  H04L67/1097 ,  H04L101/622

Abstract: A selected network element is arranged for distributed transmission resource allocation conflict reduction. The selected network element receives a transmission from one of a first other network element and a second other network element and identifies at least one transmission resource indicated by the received transmission as being reserved by the first other network element and the second other network element. The selected network element stores an indication of each of the at least one identified transmission resource. In response to reading the stored indications, the selected network element selects a different transmission resource that is different from the transmission resource indicated by the stored indications. The selected network element transmits a transmission from the selected network element using the selected different transmission resource.

公开(公告)号：US11277170B2

公开(公告)日：2022-03-15

申请号：US16885821

申请日：2020-05-28

Applicant: Texas Instruments Incorporated

Inventor： Il Han Kim ,  Anand G. Dabak ,  Tarkesh Pande

IPC: H04B3/54

Abstract: In a powerline communications (PLC) network having a first node and at least a second node on a PLC channel utilizing a band including a plurality of tones, based on at least one channel quality indicator (CQI), the first node allocates for a tone map response payload only a single (1) power control bit for each of a plurality of subbands having two or more tones. The power control bit indicates a first power state or a second power state. The first node transmits a frame including the tone map response payload to the second node. The second node transmits a frame having boosted signal power for the tones in the subbands which have the first power state compared to a lower signal power for the tones in the subbands which have the second power state.

公开(公告)号：US20210391725A1

公开(公告)日：2021-12-16

申请号：US17409892

申请日：2021-08-24

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Il Han Kim ,  Xiaolin Lu

IPC: H02J3/38 ,  H02S40/32 ,  H02S40/34

Abstract: A photovoltaic system with an inverter, at least one solar panel for providing electrical power, and electrical wiring for coupling electrical power from the at least one solar panel to the inverter. Also included is a transmitter for transmitting a messaging protocol along the electrical wiring, where the protocol includes a multibit wireline signal. Also included is circuitry for selectively connecting the electrical power from the at least one solar panel along the electrical wiring to the inverter in response to the messaging protocol.

公开(公告)号：US11082541B2

公开(公告)日：2021-08-03

申请号：US14979730

申请日：2015-12-28

Applicant: Texas Instruments Incorporated

Inventor： Anand G. Dabak ,  Badri N Varadarajan ,  Il Han Kim ,  Tarkesh Pande

IPC: H04B1/66 ,  H04B7/14 ,  H04L29/06 ,  H04B3/30 ,  H04B10/11 ,  H04B3/54 ,  H04B1/69

Abstract: Methods for building, transmitting, and receiving frame structures in power line communications (PLC) are described. Various techniques described herein provide a preamble design using one or more symbols. One or more preamble symbols may be interspersed within a header portion of a PLC frame to facilitate estimation of a frame boundary and/or sampling frequency offset, for example, in the presence of impulsive noise.

公开(公告)号：US11025301B2

公开(公告)日：2021-06-01

申请号：US16239732

申请日：2019-01-04

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Il Han Kim ,  Tarkesh Pande ,  Anuj Batra

IPC: H04B3/54

Abstract: Embodiments include methods of powerline communications using a preamble with band extension is provided. A method may include receiving a packet data unit PDU. Bit-level repetition is applied to at least a portion of the PDU to create a repeated portion. Interleaving is performed per a subchannel. Pilot tones are inserted in the interleaved portion. Each data tone is modulated with respect to a nearest one of the inserted pilot tones. The PDU is transmitted over a power line.

公开(公告)号：US10965339B2

公开(公告)日：2021-03-30

申请号：US16877062

申请日：2020-05-18

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Jyotirmoy Banik ,  Il Han Kim ,  Jianwei Zhou ,  Xiaolin Lu

IPC: H04B1/00 ,  H04B1/7143

Abstract: A method of generating a channel hopping sequence for a link in a wireless sensor network includes receiving performance quality data for respective frequency channels of frequency channels in the link in a monitoring system, determining a channel quality indicator (CQI) by the monitoring system for each frequency channel based on the respective performance quality data, and determining a repetition factor by the monitoring system for each frequency channel based on the respective CQI. A repetition factor for a frequency channel indicates a number of times the frequency channel is repeated in the channel hopping sequence.