公开(公告)号：US20180027588A1

公开(公告)日：2018-01-25

申请号：US15450644

申请日：2017-03-06

Applicant: Texas Instruments Incorporated

Inventor： KUMARAN VIJAYASANKAR ,  JYOTHSNA KUNDURU

IPC: H04W74/08 ,  H04L5/00 ,  H04B1/713 ,  H04W4/00

CPC classification number: H04W74/0808 ,  H04B1/713 ,  H04B2001/7154 ,  H04L5/0012 ,  H04L5/0055 ,  H04W4/80 ,  H04W74/085

Abstract: A method of channel access for a radio device in an asynchronous channel hopping wireless network. A backoff time is set from an Interference Avoidance Delay plus a random backoff time for transmissions from the radio device. For initial frame transmissions, an initial value for a number of backoffs (nb) and initial number of preamble detection backoffs (npdb) is set. After waiting for expiring of the initial backoff time and provided a current npdb_value

公开(公告)号：US20160344443A1

公开(公告)日：2016-11-24

申请号：US14983136

申请日：2015-12-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： KUMARAN VIJAYASANKAR ,  TIMOTHY SCHMIDL ,  RAMANUJA VEDANTHAM

IPC: H04B1/7143

Abstract: A system and method for enhanced channel hopping sequence is described. A pseudo random channel hopping sequence is redistributed using certain system specific parameters for separating adjacent transmission channels within a predetermined number of consecutive transmission channel numbers in the random channel hopping sequence to improve inter-channel interference between adjacent transmission channels.

Abstract translation: 描述了用于增强信道跳频序列的系统和方法。 伪随机信道跳频序列使用某些系统特定参数重新分布，用于在随机信道跳频序列中的预定数量的连续传输信道号内分离相邻传输信道，以改善相邻传输信道之间的信道间干扰。

公开(公告)号：US20160262098A1

公开(公告)日：2016-09-08

申请号：US15007221

申请日：2016-01-27

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： KUMARAN VIJAYASANKAR ,  ARVIND KANDHALU RAGHU ,  RAMANUJA VEDANTHAM

IPC: H04W52/02 ,  H04B1/713

CPC classification number: H04W52/0209 ,  H04B1/713 ,  H04W52/0216 ,  H04W52/0219 ,  H04W52/0229 ,  Y02B70/30 ,  Y02D70/144 ,  Y02D70/40

Abstract: Power conservation is provided in a network of globally unsynchronized wireless communication devices that use asynchronous channel hopping. Each wireless communication device defines its own channel hopping schedule. The channel hopping schedules include channel hop intervals when the device's receiver is active for receiving transmissions, and sleep intervals when the receiver is in a low power sleep state. Parameters associated with the sleep intervals are defined by each wireless communication device independently of external constraint.

Abstract translation: 在使用异步信道跳频的全球非同步无线通信设备的网络中提供功率节省。 每个无线通信设备定义其自己的信道跳频调度。 信道跳频计划包括当设备的接收机用于接收传输时的信道跳跃间隔，以及当接收机处于低功率睡眠状态时的睡眠间隔。 与休眠间隔相关联的参数由每个无线通信设备独立于外部约束来定义。

公开(公告)号：US20160142101A1

公开(公告)日：2016-05-19

申请号：US15001925

申请日：2016-01-20

Applicant: Texas Instruments Incorporated

Inventor： KUMARAN VIJAYASANKAR ,  RAMANUJA VEDANTHAM ,  ANAND G. DABAK

IPC: H04B3/54 ,  H04L12/807

CPC classification number: H04L12/413 ,  H04B3/54 ,  H04B3/542 ,  H04B2203/5408 ,  H04B2203/5433 ,  H04L69/02

Abstract: Power Line Communications (PLC) device for enhanced carrier sense multiple access (CSMA) protocols are described. The PLC device includes a modem, an AC interface and a PLC engine. The engine is configured for transmitting PC packets over a plurality of electrical wires using a particular channel. Transmitting a normal priority packet may include attempting to access a communications channel to transmit a frame after a backoff time proportional to a randomly generated number within a contention window (CW), the CW having an initial value carried over from a previous transmission of a different frame. Additionally or alternatively, some of techniques described herein may facilitate the spreading of the time over which devices attempt to transmit packets, thereby reducing the probability of collisions using, for example, Additive Decrease Multiplicative Increase (ADMI) mechanisms.

Abstract translation: 描述了用于增强载波侦听多路访问（CSMA）协议的电力线通信（PLC）设备。 PLC设备包括调制解调器，AC接口和PLC引擎。 引擎被配置为使用特定信道在多条电线上传输PC分组。 发送正常优先级分组可以包括在与争用窗口（CW）中的随机生成的数字成比例的退避时间之后尝试访问通信信道来发送帧，所述CW具有从先前的不同的传输中携带的初始值 帧。 附加地或替代地，本文描述的技术中的一些技术可以有助于扩展这些设备尝试发送分组的时间，由此例如使用添加减少乘数增加（ADMI）机制来减少冲突的概率。

公开(公告)号：US20150110163A1

公开(公告)日：2015-04-23

申请号：US14589017

申请日：2015-01-05

Applicant: Texas Instruments Incorporated

Inventor： RAMANUJA VEDANTHAM ,  ANAND G. DABAK ,  TARKESH PANDE ,  IL HAN KIM ,  KUMARAN VIJAYASANKAR

IPC: H04B3/54 ,  H04L27/26 ,  H04L29/06

CPC classification number: H04B3/542 ,  H04B2203/5408 ,  H04B2203/5445 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0094 ,  H04L27/2602 ,  H04L27/2613 ,  H04L27/2666 ,  H04L69/22

Abstract: A method of communications includes compiling a data frame for physical layer (PHY) by a first communications device at a first communications node on a network. The data frame includes a single tone PHY header portion and a data payload portion in a set of tones including at least one tone having a frequency different from a frequency of the single tone. The PHY header portion includes tone mask identification information identifying the set of tones. The first communications device transmits the data frame over the powerline to a second communications device at a second communications node on the powerline. The second communications device receives the data frame, and decodes the data payload using the tone mask identification information in the PHY header portion.

Abstract translation: 一种通信方法包括在网络上的第一通信节点处由第一通信设备编译用于物理层（PHY）的数据帧。 数据帧包括一组音调中的单音PHY头部部分和数据有效载荷部分，包括具有与单音频率不同的频率的至少一个音调。 PHY报头部分包括识别该组音调的色调掩码识别信息。 第一通信设备通过电力线将数据帧发送到电力线上的第二通信节点处的第二通信设备。 第二通信设备接收数据帧，并使用PHY报头部分中的色调掩码识别信息解码数据有效载荷。

公开(公告)号：US20150046704A1

公开(公告)日：2015-02-12

申请号：US14341366

申请日：2014-07-25

Applicant: Texas Instruments Incorporated

Inventor： ROBERT LIANG ,  KUMARAN VIJAYASANKAR

IPC: H04W12/08 ,  H04L9/08 ,  H04W4/00

CPC classification number: H04W12/08 ,  H04B2203/5433 ,  H04L9/0816 ,  H04W4/06 ,  H04W4/80 ,  H04W12/02

Abstract: A method of network joining. A first service node (SN) of SNs in a multi-Personal Area Network including data concentrators (DCs) that communicate with a server over a common communications medium configures a beacon request frame (BRF) including a Media Access Control (MAC) header including a header information element (HIE) or a payload IE (PIE), and a MAC CRC footer. The BRF includes a unique address of a first DC corresponding to the first SN or an encrypted data sequence with a key. The first SN transmits the BRF over the common communications medium. Responsive to receiving the BRF, the first DC processes the BRF to identify the unique address or has the key and applies the key to decipher the encrypted BRF. The first DC transmits a beacon frame over the common communications medium, wherein others of the plurality of DCs do not transmit respective beacon frames.

Abstract translation: 网络连接方法。 包括通过公共通信介质与服务器通信的数据集中器（DC）的多个人区域网络中的SN的第一服务节点（SN）配置包括媒体访问控制（MAC）报头的信标请求帧（BRF），所述信标请求帧包括： 标题信息元素（HIE）或有效载荷IE（PIE）以及MAC CRC页脚。 BRF包括与第一SN相对应的第一DC的唯一地址或具有密钥的加密数据序列。 第一SN通过公共通信介质发送BRF。 响应于接收BRF，第一个DC处理BRF以识别唯一地址或具有密钥，并应用密钥来解密加密的BRF。 第一DC在公共通信介质上发送信标帧，其中多个DC中的其他DC不发送相应的信标帧。