公开(公告)号：US10097371B2

公开(公告)日：2018-10-09

申请号：US14744295

申请日：2015-06-19

Applicant: Texas Instruments Incorporated

Inventor： Shu Du ,  Robert W. Liang ,  Xiaolin Lu

IPC: H04L12/413 ,  H04B3/54 ,  H04L5/00

Abstract: Systems and methods for carrier sense multiple access (CSMA) protocols for power line communications (PLC) are described. In some embodiments, a method may include performing a virtual carrier sensing operation and, in response to the virtual carrier sensing operation indicating that a communication channel is idle, calculating a contention window. The method may also include performing a physical carrier sensing operation subsequent to the virtual carrier sensing operation, the physical carrier sensing operation based, at least in part, upon the contention window. In response to the physical carrier sensing operation indicating that the communication channel is idle, the method may then include transmitting data over the channel. In other embodiments, another method may include determining that a data transmission is a unicast transmission and that an acknowledgement message has not been received. The method may further include incrementing a backoff parameter and repeating one or more carrier sense operations.

公开(公告)号：US09913214B2

公开(公告)日：2018-03-06

申请号：US14862787

申请日：2015-09-23

Applicant: Texas Instruments Incorporated

Inventor： Ariton E. Xhafa ,  Xiaolin Lu ,  Jianwei Zhou

IPC: G08C17/00 ,  H04W52/02 ,  H04L5/00 ,  H04L29/08

CPC classification number: H04W52/02 ,  H04L5/0053 ,  H04L67/12 ,  H04W52/0219 ,  Y02D70/00 ,  Y02D70/144

Abstract: The white list generator identifies wireless sensor nodes that communicate via a wireless sensor network, to identifies time slots assigned for with each of the identified wireless sensor nodes, and to create and maintain a list of the identified wireless sensor nodes and corresponding time slots. The white list generator provides power control information to power a transceiver for reception of transmissions from each identified wireless sensor node based on the identified time slots corresponding to the identified wireless sensor node provided in the list.

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：US20160028438A1

公开(公告)日：2016-01-28

申请号：US14878178

申请日：2015-10-08

Applicant: Texas Instruments Incorporated

Inventor： Yanjun Sun ,  Gang Xu ,  Soon-Hyeok Choi ,  Bhadra Sandeep ,  Xiaolin Lu ,  Ariton E. Xhafa ,  Minghua Fu ,  Robert W. Liang ,  Susan Yim

IPC: H04B3/54

CPC classification number: H04B3/54 ,  H04B1/123 ,  H04B1/401 ,  H04B3/30 ,  H04B2203/5441 ,  H04B2203/5495

Abstract: A method for implementing a convergence layer. Data is received on a first communication medium by a first transceiver. Data is transmitted on the first communication medium by the first transceiver. A signal is received. Causing, through the convergence layer, by a control logic in response to the signal, the data received and transmitted on the first communication medium as part of a communication session to be received and transmitted instead by a second transceiver on a second communication medium, wherein the convergence layer is configured to conceal from a routing layer at least one of: information related to the first signal, and information related to the data being received and transmitted on the second communication medium.

Abstract translation: 一种实现会聚层的方法。 通过第一收发器在第一通信介质上接收数据。 数据由第一收发器在第一通信介质上传送。 接收到一个信号。 通过汇聚层通过响应于该信号的控制逻辑，将第一通信介质上接收和发送的数据作为要在第二通信介质上被第二收发器接收和发送的通信会话的一部分，其中 汇聚层被配置为从路由层隐藏以下至少一个：与第一信号相关的信息，以及与在第二通信介质上正在接收和发送的数据相关的信息。

公开(公告)号：US20150288534A1

公开(公告)日：2015-10-08

申请号：US14744295

申请日：2015-06-19

Applicant: Texas Instruments Incorporated

Inventor： Shu Du ,  Robert W. Liang ,  Xiaolin Lu

IPC: H04L12/413 ,  H04L5/00 ,  H04B3/54

CPC classification number: H04L12/413 ,  H04B3/544 ,  H04L5/0096

Abstract: Systems and methods for carrier sense multiple access (CSMA) protocols for power line communications (PLC) are described. In some embodiments, a method may include performing a virtual carrier sensing operation and, in response to the virtual carrier sensing operation indicating that a communication channel is idle, calculating a contention window. The method may also include performing a physical carrier sensing operation subsequent to the virtual carrier sensing operation, the physical carrier sensing operation based, at least in part, upon the contention window. In response to the physical carrier sensing operation indicating that the communication channel is idle, the method may then include transmitting data over the channel. In other embodiments, another method may include determining that a data transmission is a unicast transmission and that an acknowledgement message has not been received. The method may further include incrementing a backoff parameter and repeating one or more carrier sense operations.

Abstract translation: 描述了用于电力线通信（PLC）的载波侦听多路访问（CSMA）协议的系统和方法。 在一些实施例中，方法可以包括执行虚拟载波侦听操作，并且响应于指示通信信道空闲的虚拟载波侦听操作，计算竞争窗口。 该方法还可以包括在虚拟载波感测操作之后执行物理载波感测操作，至少部分地基于竞争窗口进行物理载波感测操作。 响应于指示通信信道空闲的物理载波感测操作，该方法然后可以包括通过信道发送数据。 在其他实施例中，另一种方法可以包括确定数据传输是单播传输，还没有接收到确认消息。 该方法还可以包括增加退避参数并重复一个或多个载波检测操作。

公开(公告)号：US09113340B2

公开(公告)日：2015-08-18

申请号：US14513934

申请日：2014-10-14

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Yanjun Sun ,  Ariton E. Xhafa ,  Xiaolin Lu ,  Josef Peery

IPC: H04W16/14 ,  H04W88/06 ,  H04L5/22 ,  H04W4/00 ,  H04W56/00 ,  H04W72/04

CPC classification number: H04W16/14 ,  H04L5/22 ,  H04W4/80 ,  H04W56/00 ,  H04W72/0446 ,  H04W88/06

Abstract: A system and method for arbitrating channel access in a wireless device including co-located network transceivers are disclosed herein. A wireless device includes a first wireless transceiver and a second wireless transceiver. The first transceiver is configured for operation with a first wireless network. The second transceiver is configured for operation with a second wireless network. The wireless device further includes logic that determines which of the first and second transceivers is enabled to transmit at a given time. The logic causes the first transceiver to transmit a notification signal indicating a time period during which the second transceiver of the wireless device will perform a first wireless transaction, and during which, based on receiving the notification signal, a different wireless device performs a second wireless transaction via the second wireless network without transmitting a notification signal.

Abstract translation: 本文公开了一种用于在包括共位网络收发器的无线设备中仲裁信道接入的系统和方法。 无线设备包括第一无线收发器和第二无线收发器。 第一收发器被配置为与第一无线网络一起操作。 第二收发器被配置为与第二无线网络一起操作。 无线设备还包括确定在给定时间能够发送第一和第二收发器中的哪一个的逻辑。 该逻辑使得第一收发器发送指示无线设备的第二收发器将执行第一无线交易的时间段的通知信号，并且在此期间，基于接收到该通知信号，不同的无线设备执行第二无线 经由第二无线网络进行交易，而不发送通知信号。

公开(公告)号：US20150222327A1

公开(公告)日：2015-08-06

申请号：US14688526

申请日：2015-04-16

Applicant: Texas Instruments Incorporated

Inventor： Yanjun Sun ,  Minghua Fu ,  Xiaolin Lu

IPC: H04B3/56

CPC classification number: H04B3/56 ,  H04B3/54 ,  H04B3/542

Abstract: A power line communication network includes a plurality of PLC devices. The PLC devices communicate packets over conductors of an electrical power distribution system via a plurality of non-interfering channels. Different ones of the PLC devices are configured to communicate packets via different ones of the non-interfering channels.

Abstract translation: 电力线通信网络包括多个PLC设备。 PLC设备经由多个非干扰信道在配电系统的导体上传送分组。 不同的PLC设备被配置为经由不同的非干扰信道来传送分组。

公开(公告)号：US08891508B2

公开(公告)日：2014-11-18

申请号：US14028982

申请日：2013-09-17

Applicant: Texas Instruments Incorporated

Inventor： Yanjun Sun ,  Ariton E. Xhafa ,  Xiaolin Lu ,  Josef Peery

IPC: H04J3/06 ,  H04L5/22 ,  H04W16/14 ,  H04W88/06

CPC classification number: H04W16/14 ,  H04L5/22 ,  H04W4/80 ,  H04W56/00 ,  H04W72/0446 ,  H04W88/06

Abstract: A system and method for arbitrating channel access in a wireless device including co-located network transceivers are disclosed herein. A wireless device includes a first wireless transceiver and a second wireless transceiver. The first transceiver is configured for operation with a first wireless network. The second transceiver is configured for operation with a second wireless network. The wireless device further includes logic that determines which of the first and second transceivers is enabled to transmit at a given time. The logic causes the first transceiver to transmit a notification signal indicating a time period during which the second transceiver of the wireless device will perform a first wireless transaction, and during which, based on receiving the notification signal, a different wireless device performs a second wireless transaction via the second wireless network without transmitting a notification signal.

Abstract translation: 本文公开了一种用于在包括共位网络收发器的无线设备中仲裁信道接入的系统和方法。 无线设备包括第一无线收发器和第二无线收发器。 第一收发器被配置为与第一无线网络一起操作。 第二收发器被配置为与第二无线网络一起操作。 无线设备还包括确定在给定时间能够发送第一和第二收发器中的哪一个的逻辑。 该逻辑使得第一收发器发送指示无线设备的第二收发器将执行第一无线交易的时间段的通知信号，并且在此期间，基于接收到该通知信号，不同的无线设备执行第二无线 经由第二无线网络进行交易，而不发送通知信号。

公开(公告)号：US20140233586A1

公开(公告)日：2014-08-21

申请号：US14264676

申请日：2014-04-29

Applicant: Texas Instruments Incorporated

Inventor： Shu Du ,  Robert W. Liang ,  Xiaolin Lu

IPC: H04L12/413 ,  H04B3/54 ,  H04L5/00

CPC classification number: H04L12/413 ,  H04B3/544 ,  H04L5/0096

Abstract: Systems and methods for carrier sense multiple access (CSMA) protocols for power line communications (PLC) are described. In some embodiments, a method may include performing a virtual carrier sensing operation and, in response to the virtual carrier sensing operation indicating that a communication channel is idle, calculating a contention window. The method may also include performing a physical carrier sensing operation subsequent to the virtual carrier sensing operation, the physical carrier sensing operation based, at least in part, upon the contention window. In response to the physical carrier sensing operation indicating that the communication channel is idle, the method may then include transmitting data over the channel. In other embodiments, another method may include determining that a data transmission is a unicast transmission and that an acknowledgement message has not been received. The method may further include incrementing a backoff parameter and repeating one or more carrier sense operations.

Abstract translation: 描述了用于电力线通信（PLC）的载波侦听多路访问（CSMA）协议的系统和方法。 在一些实施例中，方法可以包括执行虚拟载波侦听操作，并且响应于指示通信信道空闲的虚拟载波侦听操作，计算竞争窗口。 该方法还可以包括在虚拟载波感测操作之后执行物理载波感测操作，至少部分地基于竞争窗口进行物理载波感测操作。 响应于指示通信信道空闲的物理载波感测操作，该方法然后可以包括通过信道发送数据。 在其他实施例中，另一种方法可以包括确定数据传输是单播传输，还没有接收到确认消息。 该方法还可以包括增加退避参数并重复一个或多个载波检测操作。

公开(公告)号：US12261835B2

公开(公告)日：2025-03-25

申请号：US18408969

申请日：2024-01-10

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Oliver Shih ,  Arvind K. Raghu ,  Ramanuja Vedantham ,  Xiaolin Lu

IPC: H04L9/40 ,  H04L9/32

Abstract: Authentication of a networked device with limited computational resources for secure communications over a network. Authentication of the device begins with the supplicant node transmitting a signed digital certificate with its authentication credentials to a proxy node. Upon verifying the certificate, the proxy node then authenticates the supplicant's credentials with an authentication server accessible over the network, acting as a proxy for the supplicant node. Typically, this verification includes decryption according to a public/private key scheme. Upon successful authentication, the authentication server creates a session key for the supplicant node and communicates it to the proxy node. The proxy node encrypts the session key with a symmetric key, and transmits the encrypted session key to the supplicant node which, after decryption, uses the session key for secure communications. In some embodiments, the authentication server encrypts the session key with the symmetric key.