公开(公告)号：US09602394B2

公开(公告)日：2017-03-21

申请号：US14663415

申请日：2015-03-19

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Muhammad Owais Khan

IPC: H04W4/00 ,  H04L12/721 ,  H04B3/54 ,  H04L12/707

CPC classification number: H04L45/26 ,  H04B3/542 ,  H04L45/124 ,  H04L45/22

Abstract: Determination of a transmission through a network having a plurality of nodes using carrier sense multiple access collision avoidance (CSMA/CA) may be performed by broadcasting a route request (RREQ) packet from a source node that is targeted towards a destination node within the network, such that the RREQ is received by a first set of nodes in proximity to the source node. After first receiving a RREQ, each of the plurality of nodes rebroadcasts the RREQ after waiting a randomized amount of wait time. During each randomized wait time, the node suppresses all but one RREQ received by the node during the wait time.

公开(公告)号：US20170063572A1

公开(公告)日：2017-03-02

申请号：US15353223

申请日：2016-11-16

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar

IPC: H04L12/413 ,  H04L1/00 ,  H04L5/00 ,  H04B3/54

CPC classification number: H04L12/413 ,  H04B3/54 ,  H04B2203/5408 ,  H04B2203/5425 ,  H04L1/0002 ,  H04L5/0007 ,  H04W74/0816

Abstract: Transmission over a communication channel using carrier sense multiple access collision avoidance (CSMA/CA) may be performed by determining for each frame if the communication channel is busy after a backoff time proportional to a randomly generated number within a contention window (CW). When the channel is not busy, a frame of data may be transmitted. When the channel is busy, the device may periodically determine if the communication channel is busy after subsequent backoff times. The value of CW is adjusted for each subsequent backoff time using a fairness protocol, in which the value of CW is increased until the value of CW reaches a maximum CW value; and then the value of CW is held until a fairness number of backoff repetitions reaches a fairness threshold; then the value of CW is reduced incrementally until the value of CW reaches a minimum CW value.

Abstract translation: 如果通信信道在竞争窗口（CW）中与随机生成的数字成比例的退避时间之后通信信道为忙，则可以通过确定每个帧来执行使用载波侦听多址冲突避免（CSMA / CA）的通信信道上的传输。 当信道不忙时，可以发送一帧数据。 当信道繁忙时，设备可以在后续的退避时间周期性地确定通信信道是否正在占线。 使用公平协议对每个后续退避时间调整CW的值，其中CW的值增加，直到CW的值达到最大CW值; 然后持续CW的值，直到公平的退避次数达到公平阈值; 那么CW的值逐渐减小，直到CW的值达到最小CW值。

公开(公告)号：US20160330213A1

公开(公告)日：2016-11-10

申请号：US15216291

申请日：2016-07-21

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04L29/06

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：US09438309B2

公开(公告)日：2016-09-06

申请号：US14990471

申请日：2016-01-07

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Il Han Kim

IPC: H04B3/00 ,  H04B3/54 ,  H04B3/46

CPC classification number: H04B3/54 ,  H04B3/46 ,  H04B3/542 ,  H04B2203/5495

Abstract: Apparatus (and related methods) for a power line communication network include a processor configured to receive beacons over a communication interface. The processor determines a link quality indicator (LQI) for each received beacon and ignores the beacons for at most a predetermined maximum number of beacon receptions when each LQI is below a threshold. The processor responds to a received beacon if the LQI for such received beacon exceeds the threshold or if a predetermined maximum number of beacons have been received with LQIs below the threshold.

Abstract translation: 用于电力线通信网络的装置（和相关方法）包括被配置为通过通信接口接收信标的处理器。 处理器为每个接收到的信标确定链路质量指示符（LQI），并且当每个LQI低于阈值时，忽略至多一个预定最大数量的信标接收的信标。 如果用于这种接收到的信标的LQI超过阈值，或者如果已经接收到具有低于阈值的LQI的预定最大数量的信标，则处理器响应于所接收的信标。

公开(公告)号：US20160080169A1

公开(公告)日：2016-03-17

申请号：US14949069

申请日：2015-11-23

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar

IPC: H04L12/413 ,  H04L1/00 ,  H04L5/00 ,  H04B3/54

CPC classification number: H04L12/413 ,  H04B3/54 ,  H04B2203/5408 ,  H04B2203/5425 ,  H04L1/0002 ,  H04L5/0007 ,  H04W74/0816

Abstract: Transmission over a communication channel using carrier sense multiple access collision avoidance (CSMA/CA) may be performed by determining for each frame if the communication channel is busy after a backoff time proportional to a randomly generated number within a contention window (CW). When the channel is not busy, a frame of data may be transmitted. When the channel is busy, the device may periodically determine if the communication channel is busy after subsequent backoff times. The value of CW is adjusted for each subsequent backoff time using a fairness protocol, in which the value of CW is increased until the value of CW reaches a maximum CW value; and then the value of CW is held until a fairness number of backoff repetitions reaches a fairness threshold; then the value of CW is reduced incrementally until the value of CW reaches a minimum CW value.

Abstract translation: 如果通信信道在竞争窗口（CW）中与随机生成的数字成比例的退避时间之后通信信道为忙，则可以通过确定每个帧来执行使用载波侦听多址冲突避免（CSMA / CA）的通信信道上的传输。 当信道不忙时，可以发送一帧数据。 当信道繁忙时，设备可以在后续的退避时间周期性地确定通信信道是否正在占线。 使用公平协议对每个后续退避时间调整CW的值，其中CW的值增加，直到CW的值达到最大CW值; 然后持续CW的值，直到公平的退避次数达到公平阈值; 则CW的值逐渐减小，直到CW的值达到最小CW值。

公开(公告)号：US20150172073A1

公开(公告)日：2015-06-18

申请号：US14631669

申请日：2015-02-25

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham

IPC: H04L12/413 ,  H04L5/00 ,  H04L27/26 ,  H04B3/54

CPC classification number: H04L12/413 ,  H04B3/542 ,  H04B3/544 ,  H04B2203/5408 ,  H04B2203/5454 ,  H04L1/0041 ,  H04L1/0065 ,  H04L1/0067 ,  H04L1/08 ,  H04L1/1671 ,  H04L1/18 ,  H04L5/0044 ,  H04L5/0094 ,  H04L27/2601 ,  H04L27/2646

Abstract: Segmented frames of data may be transmitted from a transmitting device using conflict free slots (CFS) within a carrier sense multiple access with collision avoidance (CSMA/CA) protocol on a noisy media. At a receiver, a segmented frame of data is received. The data is represented by a plurality of tones. If requested by the transmitter, a tone map response command is prepared that specifies a set of optimized tone map parameters by analyzing the received frame of data. Any previously determined tone map response commands to the transmitting device are deleted. A sequence of frame segments may be received in conflict free slots, but only one tone map response is transmitted to the transmitting device after receiving the entire sequence of frame segments.

Abstract translation: 数据帧可以在具有冲突避免（CSMA / CA）协议的载波侦听多路访问中使用无冲突时隙（CFS）从发送设备发送。 在接收机处，接收分段的数据帧。 数据由多个音调表示。 如果由发射机请求，则通过分析接收的数据帧来准备一个音调映射响应命令，该命令指定一组优化的音调映射参数。 任何先前确定的发送设备的音调映射响应命令被删除。 可以在无冲突时隙中接收帧序列，但是在接收到整个帧段序列之后，只有一个音调映射响应被发送到发送设备。

公开(公告)号：US20140056369A1

公开(公告)日：2014-02-27

申请号：US13971638

申请日：2013-08-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Xiaolin Lu

IPC: H04B3/54

CPC classification number: H04B3/544 ,  H04B2203/5408 ,  H04B2203/5445

Abstract: A power line communication device connected to a power line communication network that includes a transceiver to transmit messages to a plurality of nodes on the network and to receive messages from the plurality of nodes on the network, and a processor coupled to the transceiver to evaluate received messages and generate messages to transmit. The processor, upon receiving a promotion needed message from an additional power line communication (PLC) device joining the network, is to determine whether data communication has already been established with a base node of the network, determine whether the device is already seeking promotion to be a switch node or has already been promoted to the switch node, and determine a signal quality of the received promotion needed message from the additional PLC device joining the network. Based on those determinations, the processor is to adjust a frequency at which to transmit a promotion request based on a number of promotion requests received from the plurality of other nodes on the network and a number of promotion needed messages received.

Abstract translation: 一种连接到电力线通信网络的电力线通信设备，该电力线通信网络包括：收发器，用于向所述网络上的多个节点发送消息并从所述网络上的所述多个节点接收消息;以及处理器，耦合到所述收发器以评估接收到的 消息并生成要发送的消息。 处理器在接收到来自加入网络的附加电力线通信（PLC）设备的促销需求消息时，是确定数据通信是否已经与网络的基站节点建立，确定设备是否已经在寻求促销 作为交换节点，或者已经被提升到交换节点，并且从加入网络的附加PLC设备确定接收到的促销所需消息的信号质量。 基于这些确定，处理器是基于从网络上的多个其他节点接收到的促销请求的数量以及接收到的促销所需消息的数量来调整用于发送促销请求的频率。

公开(公告)号：US20130194975A1

公开(公告)日：2013-08-01

申请号：US13749486

申请日：2013-01-24

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Ramachandran Ananthakrishnan ,  Robert Liang

IPC: H04L12/24

CPC classification number: H04L45/02 ,  H04B3/542 ,  H04B2203/5408 ,  H04B2203/5433 ,  H04B2203/5445

Abstract: Embodiments of methods and systems for switch table update using demotion command in PRIME are presented. In one embodiment, the method is performed by a power line communication (PLC) device. For example, the PLC device may be a data concentrator. In such an embodiment, the method may include receiving a request for registration from a node in a PLC network. The method may also include determining whether the node was previously included in the network according to an alternate network topology configuration. Additionally, the method may include issuing a notification to a group of switch nodes in the network instructing the switch nodes to update respective switch tables in response to a determination that the node was previously included in the network according to an alternate network topology configuration.

Abstract translation: 介绍了在PRIME中使用降级命令进行切换表更新的方法和系统的实施例。 在一个实施例中，该方法由电力线通信（PLC）装置执行。 例如，PLC设备可以是数据集中器。 在这样的实施例中，该方法可以包括从PLC网络中的节点接收注册请求。 该方法还可以包括根据备用网络拓扑配置来确定节点是否先前包括在网络中。 此外，该方法可以包括向网络中的一组交换节点发出通知，指示交换机节点根据替代的网络拓扑配置来响应于先前将该节点包括在网络中的确定来更新相应的交换机表。

公开(公告)号：US20130182719A1

公开(公告)日：2013-07-18

申请号：US13738883

申请日：2013-01-10

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Xiaolin Lu

IPC: H04B3/54

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

Abstract: Embodiments of methods and systems 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 generating a first data packet having a first adaptive sub-band information set, the first sub-band information set comprising information to be used by a PLC receiver for determining a sub-band hopping pattern. The method may also include transmitting the first data packet on a first PLC sub-band. Additionally, the method may include hopping to a second PLC sub-band, and generating a second data packet having a second adaptive sub-band information set, the second sub-band information set comprising information to be used by the PLC receiver for determine the sub-band hopping pattern. The method may further include transmitting the second data packet on the second PLC sub-band.

Abstract translation: 提出了自适应子带点对点通信的方法和系统的实施例。 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。 该方法可以包括生成具有第一自适应子带信息集的第一数据分组，第一子带信息集包括由PLC接收机用于确定子带跳频模式的信息。 该方法还可以包括在第一PLC子带上发送第一数据分组。 此外，该方法可以包括跳跃到第二PLC子带，以及生成具有第二自适应子带信息集的第二数据分组，第二子带信息集包括由PLC接收机使用的信息，以确定 子带跳频图案。 该方法还可以包括在第二PLC子带上发送第二数据分组。

公开(公告)号：US20130094597A1

公开(公告)日：2013-04-18

申请号：US13655414

申请日：2012-10-18

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Robert Liang

IPC: H04B3/00

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: 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 identifying at least one bootstrapping agent and a personal area network (PAN) identifier for one or more networks that are operating within a personal operating space of the PLC device. The device selects a target bootstrapping agent to use for the join process with a target network. The target bootstrapping agent may be selected from a list of bootstrapping agents associated with the target PAN identifier. If the attempt to join the target network fails, then the device further determines if other bootstrapping agents are associated with the target PAN identifier. The device 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: 描述了用于电力线通信（PLC）的路由协议的系统和方法。 在一些实施例中，由诸如PLC计量器之类的PLC设备执行的方法可以包括标识在一个或多个网络中运行的至少一个引导代理和个人区域网络（PAN）标识符，所述网络在个人操作空间内操作 PLC设备。 设备选择目标引导代理用于与目标网络的连接进程。 可以从与目标PAN标识符相关联的引导代理的列表中选择目标引导代理。 如果加入目标网络的尝试失败，则设备进一步确定其他引导代理是否与目标PAN标识符相关联。 设备从与目标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。