公开(公告)号：US09819393B2

公开(公告)日：2017-11-14

申请号：US15451534

申请日：2017-03-07

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Robert Liang

IPC: H04B3/54 ,  H04W48/10 ,  H04L29/08

CPC classification number: H04W48/10 ,  H04B3/542 ,  H04B2203/5408 ,  H04B2203/5416 ,  H04B2203/5433 ,  H04L41/0631 ,  H04L69/324 ,  H04W4/80 ,  H04W12/06 ,  H04W24/04 ,  H04W48/16 ,  H04W48/17

Abstract: In a disclosed embodiment, a power line communication (PLC) device sends an active channel scan request from a host layer to an adaptation layer. In response to the adaptation layer receiving the request, a MAC layer is instructed to broadcast a beacon request frame. The PLC device receives from each of one or more neighboring devices that respond to the beacon request frame a beacon frame including an address and a personal area network (PAN) identifier. A listing of PAN identifiers indicated by the beacon frames is provided to the host layer. The host layer selects a target network corresponding to a selected PAN identifier and selects one of the one or more neighboring devices associated with the selected PAN identifier as a target bootstrapping agent. The host layer instructs the adaptation layer to join the target network using the target bootstrapping agent.

公开(公告)号：US09698866B2

公开(公告)日：2017-07-04

申请号：US13693298

申请日：2012-12-04

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Xiaolin Lu ,  Kumaran Vijayasankar

IPC: H04B3/54

CPC classification number: H04B3/54 ,  H04B3/548 ,  H04B2203/547

Abstract: Systems and methods for establishing scheduling for charger and electric vehicle communication in a PLC system are described. In an illustrative embodiment, a method performed by a PLC device. In a further embodiment, the PLC device may be configured to operate according to a narrow-band PLC communication protocol. In a further embodiment, the narrow-band PLC communications between PLC devices in the charger and the electric vehicle are conducted over a pilot wire coupling the charger to the electric vehicle. In still a further embodiment, the pilot wire may be one of a standard set of existing wires in a standard cable used for connecting the charger to the electric vehicle.

公开(公告)号：US20160360546A1

公开(公告)日：2016-12-08

申请号：US14982418

申请日：2015-12-29

Applicant: Texas Instruments Incorporated

Inventor： Arvind Kandhalu Raghu ,  Ariton E. Xhafa ,  Ramanuja Vedantham

IPC: H04W72/12 ,  H04W72/04 ,  H04W74/08

CPC classification number: H04W74/0808

Abstract: Transmission on a shared wireless communication channel is contended for by selecting one of a predetermined plurality of dedicated channel sensing intervals, and then performing channel sensing relative to the channel during the selected channel sensing interval. A transmission is sent on the channel in response to a determination that the channel is idle.

Abstract translation: 通过选择预定的多个专用信道感测间隔中的一个，然后在所选择的信道感测间隔期间相对于信道执行信道感测来争夺共享无线通信信道上的传输。 响应于确定信道空闲，在信道上发送传输。

公开(公告)号：US09503158B2

公开(公告)日：2016-11-22

申请号：US14956520

申请日：2015-12-02

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Xiaolin Lu

IPC: H04J3/24 ,  H04B3/54 ,  H04L7/00 ,  H04L25/02

CPC classification number: H04B3/542 ,  H04B3/54 ,  H04L7/0079 ,  H04L25/028 ,  H04L25/0286

Abstract: Embodiments of methods for adaptive sub-band point-to-point communication are presented. In one embodiment a method includes performing functions using a power line communication (PLC) transmitter device. The method may include receiving a first data packet having a first adaptive sub-band information set, the first sub-band information set comprising information from a PLC transmitter. The method may also include extracting the first sub-band information set from the first data packet. Additionally, the method may include analyzing the first sub-band information set to determine a transmitter sub-band hopping pattern. The method may further include setting a corresponding receiver sub-band hopping pattern synchronized to the sub-band hopping patter used by the PLC transmitter and hopping to a subsequent sub-band as defined by the receiver sub-band hopping pattern.

Abstract translation: 介绍了自适应子带点对点通信方法的实施例。 在一个实施例中，一种方法包括使用电力线通信（PLC）发射机设备来执行功能。 所述方法可以包括接收具有第一自适应子带信息集的第一数据分组，所述第一子带信息集包括来自PLC发射机的信息。 该方法还可以包括从第一数据分组提取第一子带信息集。 另外，该方法可以包括分析第一子带信息集以确定发射机子带跳频模式。 该方法可以进一步包括设置与由PLC发射机使用的子带跳频模式同步的对应的接收机子带跳频模式，并跳频到由接收机子带跳频模式定义的后续子带。

公开(公告)号：US20160308689A1

公开(公告)日：2016-10-20

申请号：US15192932

申请日：2016-06-24

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Anand G. Dabak

IPC: H04L12/413 ,  H04L29/06 ,  H04B3/54

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 PLC 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。 发动机被配置为使用特定通道在多个电线上传输PLC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：US09425955B2

公开(公告)日：2016-08-23

申请号：US14826342

申请日：2015-08-14

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04L29/06 ,  H04L9/08 ,  H04L9/30 ,  H04B3/54 ,  G06F15/177 ,  H04L9/32

CPC classification number: H04L63/123 ,  G06F15/177 ,  H04B3/54 ,  H04B3/542 ,  H04B2203/5408 ,  H04L9/0819 ,  H04L9/30 ,  H04L9/3242 ,  H04L63/0428 ,  H04L63/061 ,  H04L63/0876 ,  H04L2209/24

Abstract: Embodiments of the invention provide systems and methods for a cipher then segment approach in a Power Line Communication (PLC). A node or device generates frames to be transmitted to a destination node in the PLC network. A processor in the node is configured to generate a data payload comprising data to be sent to the destination node. The processor divides the data payload into two or more payload segments and encrypts the payload segments. The processor creates a frame for each of the encrypted payload segments, wherein each frame comprises a message integrity code. The processor creates a segment identifier for each frame using the message integrity code and an authentication key that is shared with the destination PLC node. The segment identifier is added to each frame.

公开(公告)号：US20160233923A1

公开(公告)日：2016-08-11

申请号：US15045909

申请日：2016-02-17

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Anand Dabak ,  Tarkesh Pande

IPC: H04B3/54 ,  H04L5/14

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 searching for and detecting a co-existence preamble on a PLC network while not transmitting or receiving frames. The device waits a time period before attempting transmission of a frame if the coexistence preamble is detected and is not followed by a native preamble. Transmissions are resumed to the PLC network after expiration of the time period.

Abstract translation: 描述了实现电力线通信（PLC）技术共存的系统和方法。 在一些实施例中，由诸如PLC网关的PLC设备执行的方法可以包括在不发送或接收帧的情况下在PLC网络上搜索和检测共存前导码。 如果检测到共存前导码，则设备在尝试发送帧之前等待一段时间，并且不跟随本机前同步码。 传输在该时间段到期后恢复到PLC网络。

公开(公告)号：US20160226716A1

公开(公告)日：2016-08-04

申请号：US15050163

申请日：2016-02-22

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Xiaolin Lu

IPC: H04L12/24 ,  H04B3/46 ,  H04B3/00

CPC classification number: H04L41/12 ,  H04B3/00 ,  H04B3/46 ,  H04B3/544

Abstract: An algorithm for the promotion of terminal nodes to switch nodes in a PLC network reduces overall network overhead and collisions, while ensuring the appropriate selection of a switch node and minimizing the number of levels in a PLC network. It also ensures that the terminal nodes with appropriate signal-to-noise ratios (SNRs) are promoted. It is desirable to have a network with fewer levels. The disclosed approach favors the nodes that are closer to the DC to promote them as switch nodes. This is achieved by waiting for a smaller number of PNPDUs for a node that is closer to the DC in comparison to a node that is farther away from the DC.

Abstract translation: 用于促进终端节点切换PLC网络中的节点的算法可减少整体网络开销和冲突，同时确保适当选择交换节点并最小化PLC网络中的级别数量。 它还确保提供具有适当信噪比（SNR）的终端节点。 希望具有较少级别的网络。 所公开的方法有利于更接近DC的节点将其推广为交换节点。 这是通过等待与离DC更远的节点相比更靠近DC的节点的较少数量的PNPDU来实现的。

公开(公告)号：US20160197647A1

公开(公告)日：2016-07-07

申请号：US15072946

申请日：2016-03-17

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Anand G. Dabak

IPC: H04B3/54 ,  H04H20/42 ,  H04L25/02 ,  H04L5/00

CPC classification number: H04B3/544 ,  H04B3/30 ,  H04B3/54 ,  H04B3/542 ,  H04B2203/5408 ,  H04H20/42 ,  H04L5/005 ,  H04L25/024

Abstract: A communications device for Multi-Tone Mask (MTM) mode communications at a first router on a powerline communications (PLC) channel in a PLC network including a subnetwork including at least said first router associated with a plurality of nodes, comprising. A memory which stores a broadcast transmission MTM (BT-MTM) communications algorithm. A modem with processor is coupled to the memory. The processor is programmed to implement said BT-MTM communications algorithm, said BT-MTM communications algorithm. A super-frame spanning a time period is received within the subnetwork. The super-frame includes beacon frames in beacon slots within a beacon period, with each beacon frame in one of N TMs, a contention access period (CAP) including a plurality of CAP slots provided for each TM, and a poll-based contention-free period (CFP). The beacon frames provide time assignments within the super-frame including time assignments for the CAP slots and for the CFP, and TM assignments for the TMs in the CAP slots. One of nodes, another router in the subnetwork, or a router in another subnetwork transmits a broadcast frame on the PLC channel. The first router forwards the broadcast frame on the PLC channel in each of the N TMs within the time period.

Abstract translation: 包括在包括至少包括与多个节点相关联的所述第一路由器的子网络的PLC网络中的电力线通信（PLC）通道上的第一路由器处的多音调掩模（MTM）模式通信的通信设备。 存储广播传输MTM（BT-MTM）通信算法的存储器。 具有处理器的调制解调器耦合到存储器。 该处理器被编程为实现所述BT-MTM通信算法，所述BT-MTM通信算法。 在子网内接收跨越时间段的超帧。 超帧包括在信标周期内的信标时隙中的信标帧，每个信标帧在N个TM之一中，竞争接入周期（CAP）包括为每个TM提供的多个CAP时隙，以及基于轮询的争用 - 免费期（CFP）。 信标帧提供超帧内的时间分配，包括CAP时隙的指定时间，以及CAP时隙中的CFP和TM分配。 节点之一，子网中的另一路由器或另一子网中的路由器在PLC信道上发送广播帧。 第一台路由器在该时间段内在每个N TM中的PLC信道上转发广播帧。

公开(公告)号：US20160150463A1

公开(公告)日：2016-05-26

申请号：US15013062

申请日：2016-02-02

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Robert Liang

IPC: H04W48/10 ,  H04B3/54 ,  H04W12/06 ,  H04W48/16 ,  H04W4/00

CPC classification number: H04W48/10 ,  H04B3/542 ,  H04B2203/5408 ,  H04B2203/5416 ,  H04B2203/5433 ,  H04L41/0631 ,  H04L69/324 ,  H04W4/80 ,  H04W12/06 ,  H04W24/04 ,  H04W48/16 ,  H04W48/17

Abstract: A bootstrapping server may include active discovering and be identified as at least one bootstrapping agent. A personal area network (PAN) identifier for one or more networks that are operating within a personal operating space of the bootstrapping server is provided . The bootstrapping server is selected a target bootstrapping agent to use for the join process with a target network. If an attempt to join the target network fails, then the bootstrapping server further determines if other bootstrapping agents are associated with the target PAN identifier. The bootstrapping server selects an alternate target bootstrapping agent from the other bootstrapping agents that are associated with the target PAN identifier and reattempts the join process.

Abstract translation: 引导服务器可以包括主动发现并被识别为至少一个自举代理。 提供了在引导服务器的个人操作空间内操作的一个或多个网络的个人区域网络（PAN）标识符。 引导引导服务器被选择用于与目标网络的连接进程的目标引导代理。 如果尝试加入目标网络失败，则引导服务器进一步确定其他引导代理是否与目标PAN标识符相关联。 引导服务器从与目标PAN标识符相关联的其他引导代理中选择备用目标引导代理，并重新尝试连接进程。