公开(公告)号：US10200171B2

公开(公告)日：2019-02-05

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: H04W72/12 ,  H04W28/04 ,  H04L27/20 ,  H04L5/00 ,  H04L27/36 ,  H04B3/54

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：US20180351860A1

公开(公告)日：2018-12-06

申请号：US16101649

申请日：2018-08-13

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Tarkesh Pande ,  Srinivas Lingam

IPC: H04L12/721 ,  H04L12/833 ,  H04L12/26 ,  H04L12/741

CPC classification number: H04L45/70 ,  H04L43/08 ,  H04L43/16 ,  H04L45/74 ,  H04L47/2458

Abstract: A method of communicating a packet between a first node and a second node, the packet comprising a data payload and a portion of information preceding the data payload. The method comprises: (i) first, identifying a quality of a channel between the first node and the second node; (ii) second, in response to the quality of the channel, selecting a manner of communication of the information preceding the data payload; (iii) third, encoding the selected manner of communication in the portion of information preceding data payload; and (iv) fourth, transmitting the packet from the first node to the second node.

公开(公告)号：US10103779B2

公开(公告)日：2018-10-16

申请号：US13644585

申请日：2012-10-04

Applicant: Texas Instruments Incorporated

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

IPC: H04L27/10 ,  H04L27/18 ,  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：US09596325B2

公开(公告)日：2017-03-14

申请号：US14556373

申请日：2014-12-01

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: A physical layer (PHY) data frame for use in conjunction with processor in a node, processor coupled to a program memory for storing a sequence of operating instructions. The frame has a preamble, PHY header, a MAC header and a MAC payload. The PHY header includes a destination address field having a destination address therein. The destination address is used by the processor to determine match with the node address.

Abstract translation: 与节点中的处理器结合使用的物理层（PHY）数据帧，耦合到程序存储器的处理器，用于存储操作指令序列。 帧具有前同步码，PHY报头，MAC报头和MAC有效载荷。 PHY标头包括其中具有目的地地址的目的地地址字段。 处理器使用目的地地址来确定与节点地址的匹配。

公开(公告)号：US09537533B2

公开(公告)日：2017-01-03

申请号：US14056755

申请日：2013-10-17

Applicant: Texas Instruments Incorporated

Inventor： Anuj Batra ,  Tarkesh Pande ,  Il Han Kim

IPC: H04B3/54 ,  H04L27/233 ,  H04L27/26

CPC classification number: H04B3/542 ,  H04L27/2331 ,  H04L27/2613

Abstract: Embodiments of the invention provide a method for discriminating between two types of encoding schemes for the frame control header (FCH) used in G3-type narrow band OFDM communications. The two modes for encoding are Differential with respect to the previous Symbol (DS) and Differential with respect to the Preamble (DP). This mode is sometimes referred to as “coherent” mode.

Abstract translation: 本发明的实施例提供了一种用于鉴别在G3型窄带OFDM通信中使用的帧控制报头（FCH）的两种类型的编码方案的方法。 编码的两种模式相对于先前的符号（DS）和差分相对于前导码（DP）是差分的。 这种模式有时被称为“相干”模式。

公开(公告)号：US09432163B2

公开(公告)日：2016-08-30

申请号：US14289264

申请日：2014-05-28

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Badri N. Varadarajan ,  Anand Ganesh Dabak ,  Tarkesh Pande ,  Eko N. Onggosanusi

IPC: H04L27/00 ,  H04L5/00 ,  H04B1/04 ,  H04L25/02

CPC classification number: H04L5/0048 ,  H04B1/04 ,  H04L23/02 ,  H04L25/0202 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2649

Abstract: In one embodiment, a transmitter includes a binary sequence generator unit configured to provide a sequence of reference signal bits, wherein the sequence is an inseparable function of a cell identification parameter, a cyclic prefix mode corresponding to the transmitter and one or more time indices of the sequence. The transmitter also include a mapping unit that transforms the sequence of reference signal bits into a complex reference signal, and a transmit unit configured to transmit the complex reference signal. In another embodiment, a receiver includes a receive unit configured to receive a complex reference signal and a reference signal decoder unit configured to detect a sequence of reference signal bits from the complex reference signal, wherein the sequence is an inseparable function of a cell identification parameter, a cyclic prefix mode corresponding to a transmitter and one or more time indices of the sequence.

公开(公告)号：US20160119028A1

公开(公告)日：2016-04-28

申请号：US14985898

申请日：2015-12-31

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04B3/54 ,  H04L12/413

CPC classification number: H04B3/544 ,  H04B2203/5408 ,  H04B2203/5433 ,  H04B2203/5445 ,  H04L12/413

Abstract: Systems and methods for setting a carrier-sensing mechanism in a PLC node are disclosed. In a PLC standard, coexistence is achieved by having the nodes detect a common preamble and backing off by a Coexistence InterFrame Space (cEIFS) time period to help the node to avoid interfering with the other technologies. In one embodiment, a PHY primitive is sent from the PHY to the MAC know that there has been a preamble detection. A two-level indication may be used - one indication after receiving the preamble and other indication after decoding the entire frame. The MAC sets the carrier-sensing mechanism based on the preamble detection.

Abstract translation: 公开了一种用于在PLC节点中设置载波感测机构的系统和方法。 在PLC标准中，通过使节点检测到公共前同步码并通过共存帧间空间（cEIFS）时间段进行后退来实现共存，以帮助节点避免干扰其他技术。 在一个实施例中，PHY原语从PHY发送到MAC，知道已经有前导码检测。 可以使用两级指示 - 在解码整个帧之后接收到前导码和其他指示之后的一个指示。 MAC基于前导码检测设置载波侦听机制。

公开(公告)号：US09319238B2

公开(公告)日：2016-04-19

申请号：US14637262

申请日：2015-03-03

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04L12/413 ,  H04L12/927 ,  H04L12/40 ,  H04B3/54 ,  H04L12/28

CPC classification number: H04L12/413 ,  H04B3/542 ,  H04B2203/5433 ,  H04L12/283 ,  H04L12/40156 ,  H04L47/805 ,  H04L2012/2843

Abstract: Embodiments of a power line communication (PLC) transmitter device for overlapping priority contention windows are presented. A processor is configured to perform a physical channel sense operation to detect an idle channel on a PLC network. A transmitter transmits a normal priority data packet on the channel during a high priority contention window. In another embodiment, a Normal Priority Contention Window (NPCW) is allowed to overlap with a High Priority Contention Window (HPCW). The minimum contention window for the normal priority frames (i.e., NPCW) is equal to or longer than the contention window for high priority frames (i.e., HPCW). By making the NPCW longer than the HPCW, the high priority frames will have a better chance than normal priority frames to get access to the channel on transmission reattempts.

Abstract translation: 提出了用于重叠优先级争用窗口的电力线通信（PLC）发射机设备的实施例。 处理器被配置为执行物理信道检测操作以检测PLC网络上的空闲信道。 发射机在高优先权竞争窗口期间在信道上发送普通优先级数据分组。 在另一个实施例中，允许正常优先权竞争窗口（NPCW）与高优先权争用窗口（HPCW）重叠。 正常优先级帧（即NPCW）的最小竞争窗口等于或大于高优先级帧（即HPCW）的争用窗口。 通过使NPCW比HPCW长，高优先级帧将比正常优先级帧更有可能在传输重新尝试时访问该信道。

公开(公告)号：US09300361B2

公开(公告)日：2016-03-29

申请号：US14576334

申请日：2014-12-19

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Anand Dabak ,  Tarkesh Pande

IPC: H04B3/00 ,  H04B3/54

CPC classification number: H04B3/54 ,  H04B3/546 ,  H04B2203/5408 ,  H04B2203/5433 ,  H04B2203/5445 ,  H04L5/14

Abstract: Systems and methods for enabling co-existence among power line communications (PLC) technologies are described. In some embodiments, a method performed by a PLC device, such as a PLC gateway, may include detecting a communication from foreign PLC device on a PLC network in response to a foreign preamble received by the PLC device, terminating transmissions to the PLC network for a network-specific co-existence Extended Interframe Space (cEIFS) time period in response to the foreign preamble, and resuming transmissions to the PLC network after expiration of the network-specific time period.

公开(公告)号：US09231658B2

公开(公告)日：2016-01-05

申请号：US13923097

申请日：2013-06-20

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04J3/02 ,  H04B3/54

CPC classification number: H04B3/544 ,  H04B2203/5408 ,  H04B2203/5433 ,  H04B2203/5445 ,  H04L12/413

Abstract: Systems and methods for setting a Network Allocation Vector (NAV) in a PLC node are disclosed. In a PLC standard, coexistence is achieved by having the nodes detect a common preamble and backing off by a Coexistence InterFrame Space (cEIFS) time period to help the node to avoid interfering with the other technologies. In one embodiment, a PHY primitive is sent from the PHY to the MAC know that there has been a preamble detection. A two-level indication may be used—one indication after receiving the preamble and other indication after decoding the entire frame. The MAC sets NAV to EIFS if a native preamble is detected. The MAC sets NAV to cEIFS if only a coexistence preamble is detected or if a non-native preamble is detected.

Abstract translation: 公布了在PLC节点中设置网络分配向量（NAV）的系统和方法。 在PLC标准中，通过使节点检测到公共前同步码并通过共存帧间空间（cEIFS）时间段进行后退来实现共存，以帮助节点避免干扰其他技术。 在一个实施例中，PHY原语从PHY发送到MAC，知道已经有前导码检测。 可以使用两级指示 - 在解码整个帧之后接收到前导码和其他指示之后的一个指示。 如果检测到本机前导码，则MAC将NAV设置为EIFS。 如果仅检测到共存前导码或者是否检测到非本地前导码，则MAC将NAV设置为cEIFS。