公开(公告)号：US10177814B2

公开(公告)日：2019-01-08

申请号：US14816671

申请日：2015-08-03

Applicant: Texas Instruments Incorporated

Inventor： Il Han Kim ,  Tarkesh Pande ,  Anuj Batra

IPC: H04B3/00 ,  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：US20180048354A1

公开(公告)日：2018-02-15

申请号：US15793900

申请日：2017-10-25

Applicant: Texas Instruments Incorporated

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

IPC: H04B3/54 ,  H04L12/911

CPC classification number: H04B3/542 ,  H04B2203/5408 ,  H04B2203/5416 ,  H04L47/78

Abstract: Systems and methods for application profiles and device classes in power line communications (PLCs) are described. In some embodiments, a PLC device has the device class defined by a PHY layer and may include a processor and a memory coupled to the processor. The memory may be configured to store program instructions, which may be executable by the processor to cause the PLC device to communicate with a higher-level PLC apparatus over a power line using a frequency band. The frequency band may be selected based upon an application profile and/or a device class associated with the PLC device. In some implementations, the higher-level PLC apparatus may include a PLC gateway or a data concentrator, and the PLC device may include a PLC modem or the like. Examples of application profiles include access communications, in-premises connectivity, AC charging, and/or DC charging. Device classes may represent a minimum communication data rate and/or an operating frequency band restriction of the PLC device.

公开(公告)号：US09894189B2

公开(公告)日：2018-02-13

申请号：US15419045

申请日：2017-01-30

Applicant: Texas Instruments Incorporated

Inventor： Gang Xu ,  Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Anand G. Dabak ,  Tarkesh Pande ,  Il Han Kim ,  Xiaolin Lu

IPC: H04J3/24 ,  H04L29/06 ,  H04B3/54

CPC classification number: H04L69/22 ,  H04B3/54 ,  H04B3/542 ,  H04B2203/5408

Abstract: In a disclosed embodiment, a method for communication in a network includes receiving, at a first device registered to the network, a physical layer (PHY) frame that includes a PHY header and a MAC header. The PHY frame may further include a MAC payload. The PHY header includes a destination address field. The method further includes comparing a network address of the first device to the destination address field to determine whether the destination address field stores a value having the same number of bits as the network address. When the comparison indicates that the value stored by the destination address field does not have the same number of bits as the network address, the method skips decoding the MAC header and the MAC payload.

公开(公告)号：US09819392B2

公开(公告)日：2017-11-14

申请号：US15476587

申请日：2017-03-31

Applicant: Texas Instruments Incorporated

Inventor： Badri N Varadarajan ,  Anand Dabak ,  Il Han Kim

IPC: H04B3/54 ,  H04L29/08 ,  H04L1/00

CPC classification number: H04B3/54 ,  H04L1/0041 ,  H04L1/0071 ,  H04L69/22 ,  H04L69/323

Abstract: In a disclosed embodiment, a power line communication (PLC) transmitter includes a forward error correction (FEC) encoder that receives payload data and adds parity information to the data to create an encoded output, a fragmenter that receives the encoded output from the FEC encoder and segments the encoded output into a plurality of fragments, a fragment repetition encoder that receives the plurality of fragments from the fragmenter and copies each of the fragments a selected number of times, and an interleaver that receives the copies of the plurality of fragments from the fragment repetition encoder and interleaves the copies of the plurality of fragments for transmission on a power line.

公开(公告)号：US20170317803A1

公开(公告)日：2017-11-02

申请号：US15651132

申请日：2017-07-17

Applicant: Texas Instruments Incorporated

Inventor： Jing Lin ,  Tarkesh Pande ,  Il Han Kim ,  Anuj Batra

IPC: H04L5/00 ,  H04L27/20 ,  H04B3/54 ,  H04W28/04 ,  H04L27/36

CPC classification number: H04L5/0048 ,  H04B3/54 ,  H04B2203/5408 ,  H04L27/20 ,  H04L27/36 ,  H04W28/04 ,  H04W72/1263

Abstract: A method of encoding a first bit and a second bit for transmission on a transmission band is provided. The method includes: mapping, via a mapping component, the first bit and the second bit into a first symbol; mapping, via the mapping component, the first bit and the second bit into a second symbol; dividing, via a dividing component, the transmission band into subcarriers; allocating, via an allocating component, the first symbol to a first subcarrier of the subcarriers; allocating, via the allocating component, the second symbol to a second subcarrier of the subcarriers; and differentially encoding, via a differential encoder, the first symbol and the second symbol.

公开(公告)号：US09774535B2

公开(公告)日：2017-09-26

申请号：US15462703

申请日：2017-03-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Anand G. Dabak ,  Tarkesh Pande ,  Il Han Kim

IPC: H04L12/24 ,  H04L12/801 ,  H04L12/835 ,  H04B3/54

CPC classification number: H04L47/266 ,  H04B3/542 ,  H04B2203/5408 ,  H04L47/12 ,  H04L47/127 ,  H04L47/30 ,  H04L47/32 ,  Y02D50/10

Abstract: A method of powerline communications in a powerline communications (PLC) network including a first node and at least a second node. The first node transmits a data frame to the second node over a PLC channel. The second node has a data buffer for storing received information. The second node runs a flow control algorithm which determines a current congestion condition or a projected congestion condition of the data buffer based on at least one congestion parameter. The current congestion condition and projected congestion condition include nearly congested and fully congested. When the current or projected congestion condition is either nearly congested or fully congested, the second node transmits a BUSY including frame over the PLC channel to at least the first node. The first node defers transmitting of any frames to the second node for a congestion clearing wait time.

公开(公告)号：US09692554B2

公开(公告)日：2017-06-27

申请号：US14885715

申请日：2015-10-16

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Mehul Soman ,  Tarkesh Pande ,  Il Han Kim ,  Anuj Batra ,  Minghua Fu

IPC: H04L1/00 ,  H04B3/54 ,  H04L27/00 ,  H04L27/26

CPC classification number: H04L1/0045 ,  H04B3/54 ,  H04L1/004 ,  H04L27/0002 ,  H04L27/2602

Abstract: A band of interest is divided into band segments. A scan frame is sent by a transmitter at a transmitting PLC node across each band segment. A receiver at a receiving node scans the band segments, listening for the scan frame. Upon detecting a scan frame, the receiving node measures the signal quality of each OFDM subcarrier modulated with symbols from the scan frame. The subcarrier signal quality values are stored in a table. Upon completion of the scan process, the table contains a signal quality value for each subcarrier within the band of interest. The table is then analyzed to find an operating band consisting of subcarriers with a highest average signal quality or a band that results in greater than a pre-determined minimum signal quality. The invented methods and embodiments may operate periodically to readjust the operating band configuration in the presence of electromagnetic interference including time-variant interference.

公开(公告)号：US09692484B2

公开(公告)日：2017-06-27

申请号：US14925598

申请日：2015-10-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Mehul Soman ,  Il Han Kim

IPC: H04B3/54 ,  H04L7/00 ,  H04L27/26

CPC classification number: H04B3/542 ,  H04L7/0079 ,  H04L7/041 ,  H04L27/2608

Abstract: A method of operating a communication system is disclosed. The method includes forming a data frame having plural orthogonal frequency division multiplex (OFDM) symbols. A first set of preamble subcarriers is allocated to at least one of the OFDM symbols. A second set of data subcarriers is allocated to said at least one of the OFDM symbols.

公开(公告)号：US09667318B2

公开(公告)日：2017-05-30

申请号：US14798576

申请日：2015-07-14

Applicant: Texas Instruments Incorporated

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

IPC: H04L29/06 ,  H04B3/54

CPC classification number: H04B3/54 ,  H04L1/0041 ,  H04L1/0071 ,  H04L69/22 ,  H04L69/323

Abstract: Embodiments of the invention provide a device and a frame structure for powerline communications. The header may comprise two parts that are separately encoded. A common header segment is encoded alone, and an embedded header segment is encoded with payload data.

公开(公告)号：US09641219B2

公开(公告)日：2017-05-02

申请号：US14886961

申请日：2015-10-19

Applicant: Texas Instruments Incorporated

Inventor： Tarkesh Pande ,  Anand Dabak ,  Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Il Han Kim

IPC: H04L27/18 ,  H04L27/32 ,  H04B3/54 ,  H04L27/04 ,  H04L5/00 ,  H04L27/26

CPC classification number: H04B3/54 ,  H04B2203/5416 ,  H04L5/0094 ,  H04L27/04 ,  H04L27/18 ,  H04L27/2602 ,  H04L27/32

Abstract: Systems and methods for routing protocols for power line communications (PLC) are described. In some embodiments, a method performed by a PLC device, such as a PLC meter, may include selecting one or more transmit sub-bands on which to transmit frames, where the transmit sub-bands comprise groups of carrier frequencies. The PLC device then generates a frame comprising a tone map that indicates which transmit sub-bands are used to carry data for the frame. The tone map using two bits per transmit sub-band to indicate a status of each transmit sub-band. The PLC device then transmits the frame on the selected transmit sub-bands. A resolution bit and a mode bit may be used to provide additional information about the transmit sub-bands, such as an amount of power adjustment that has been applied to carrier frequencies and whether dummy bits are transmitted on unused carrier frequencies.