公开(公告)号：US20150085883A1

公开(公告)日：2015-03-26

申请号：US14557858

申请日：2014-12-02

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Anand G. Dabak ,  Badri N. Varadarajan ,  Il Han Kim ,  Xiaolin Lu

IPC: H04L5/00 ,  H04B3/54

CPC classification number: H04L5/0048 ,  H04B3/54 ,  H04B3/542 ,  H04B2203/5408 ,  H04B2203/5466 ,  H04B2203/5483 ,  H04B2203/5491 ,  H04L5/0044 ,  H04L5/0055 ,  H04L5/0078 ,  H04L5/0094 ,  H04L25/0272

Abstract: Systems and methods for designing, using, and/or implementing hybrid communication networks are described. In various embodiments, these systems and methods may be applicable to power line communications (PLC). For example, one or more of the techniques disclosed herein may include methods to coordinate medium-to-low voltage (MV-LV) and low-to-low voltage (LV-LV) PLC networks when the MV-LV network operates in a frequency subband mode and the LV-LV network operates in wideband mode (i.e., hybrid communications). In some cases, MV routers and LV routers may have different profiles. For instance, MV-LV communications may be performed using MAC superframe structures, and first-level LV to lower-level LV communications may take place using a beacon mode. Lower layer LV nodes may communicate using non-beacon modes. Also, initial scanning procedures may encourage first-to-second-level LV device communications rather than MV-to-first-level LV connections.

Abstract translation: 描述了用于设计，使用和/或实现混合通信网络的系统和方法。 在各种实施例中，这些系统和方法可以适用于电力线通信（PLC）。 例如，本文公开的技术中的一个或多个技术可以包括当MV-LV网络以一个或多个的方式工作时协调中低电压（MV-LV）和低到低电压（LV-LV）PLC网络的方法 频率子带模式和LV-LV网络在宽带模式（即，混合通信）中工作。 在某些情况下，MV路由器和LV路由器可能具有不同的配置文件。 例如，可以使用MAC超帧结构来执行MV-LV通信，并且可以使用信标模式进行第一级LV到低级LV通信。 下层LV节点可以使用非信标模式进行通信。 此外，初始扫描程序可以鼓励第一级到第二级LV器件通信，而不是MV到一级LV连接。

公开(公告)号：US20140307658A1

公开(公告)日：2014-10-16

申请号：US14254410

申请日：2014-04-16

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar

IPC: H04W74/08

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：US20140072059A1

公开(公告)日：2014-03-13

申请号：US14017053

申请日：2013-09-03

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ram Krishnan ,  Kumaran Vijayasankar ,  Ramanuja Vedantham Vedantham

IPC: G01D4/00 ,  H04B3/54

CPC classification number: G01D4/002 ,  H04B3/54 ,  H04B2203/5408 ,  H04B2203/5433

Abstract: An apparatus for a power line communication network includes a power line transmitter/receiver, a processor coupled to the power line transmitter/receiver, and memory accessible to the processor. The processor is configured to store a routing table in the memory for routing packets in an upward direction towards a data concentrator (DC). However, no routing table is provided for routing packets in a downward direction away from the DC. Instead of using a routing table to route packets in the downward direction, the processor is configured to employ source routing in the downward direction.

Abstract translation: 用于电力线通信网络的装置包括电力线发送器/接收器，耦合到电力线发送器/接收器的处理器和处理器可访问的存储器。 处理器被配置为将存储路由表存储在存储器中，以向上朝向数据集中器（DC）的方向路由分组。 但是，不提供路由表用于沿远离DC的向下方向路由分组。 代替使用路由表来沿着向下的方向路由分组，处理器被配置为在向下的方向上采用源路由。

公开(公告)号：US20130148746A1

公开(公告)日：2013-06-13

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.

Abstract translation: 描述了用于在PLC系统中建立充电器和电动车辆通信调度的系统和方法。 在说明性实施例中，由PLC设备执行的方法。 在另一实施例中，PLC设备可以被配置为根据窄带PLC通信协议进行操作。 在另一个实施例中，充电器中的PLC设备与电动车辆之间的窄带PLC通信通过将充电器连接到电动车辆的导线进行传导。 在又一个实施例中，导线可以是用于将充电器连接到电动车辆的标准电缆中的一组标准电线之一。

公开(公告)号：US20130094459A1

公开(公告)日：2013-04-18

申请号：US13651338

申请日：2012-10-12

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Ramachandran Ananthakrishnan ,  Susan Yim

IPC: H04W72/04

CPC classification number: H04B3/542 ,  H04B2203/5408 ,  H04B2203/5416 ,  H04B2203/5433

Abstract: Systems and methods for efficiently allocating beacon slot among multiple nodes on multiple levels within a power line communication network are described. In various implementations, these systems and methods may be applicable to Power Line Communications (PLC). For example, a method may include performing, by a communications device, assigning beacon transmission times to nodes within the communication device's network. The assigned beacon transmission times comprise a beacon slot and frame pattern. The beacon slot and frame pattern ensure that each node does not transmit a beacon in a beacon slot that is adjacent to a beacon slot assigned to a parent or child node. A beacon transmission slot is reserved for a base node in every frame. The frames may be organized into thirty-two-frame superframes, wherein each frame comprises a base node beacon slot and four switch node beacon slots.

Abstract translation: 描述了用于在电力线通信网络内的多个级别上的多个节点之间有效分配信标时隙的系统和方法。 在各种实现中，这些系统和方法可以适用于电力线通信（PLC）。 例如，一种方法可以包括由通信设备执行将信标传输时间分配给通信设备网络内的节点。 分配的信标传输时间包括信标时隙和帧模式。 信标时隙和帧模式确保每个节点不在与分配给父节点或子节点的信标时隙相邻的信标时隙中发送信标。 为每个帧中的基本节点保留信标传输时隙。 帧可以被组织成三十二帧超帧，其中每个帧包括基本节点信标时隙和四个交换节点信标时隙。

公开(公告)号：US20250045040A1

公开(公告)日：2025-02-06

申请号：US18228462

申请日：2023-07-31

Applicant: Texas Instruments Incorporated

Inventor： Seth Rickard ,  Kristopher Ryan Burney ,  Alexander D'Abreu ,  Suyash Jain ,  Kumaran Vijayasankar

IPC: G06F8/654 ,  G06F8/658

Abstract: An example apparatus includes: interface circuitry; machine-readable instructions; and programmable circuitry configured to at least one of instantiate or execute the machine-readable instructions to: determine a number of memory sectors to shift an original image based on a length of extra data in an updated image in differential image data; shift the original image by the number of memory sectors to create a swap area, the swap area including the number of memory sectors; and construct the updated image based on the differential image data and the original image.

公开(公告)号：US11937271B2

公开(公告)日：2024-03-19

申请号：US18157944

申请日：2023-01-23

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham

IPC: H04W72/30 ,  H04W84/18

CPC classification number: H04W72/30 ,  H04W84/18

Abstract: A method of operating a mesh network is disclosed. The method includes joining a network as a child of a parent node and receiving a downlink broadcast channel from the parent node. The method further includes setting the downlink broadcast channel as an uplink broadcast channel in response to the step of receiving.

公开(公告)号：US11909730B2

公开(公告)日：2024-02-20

申请号：US17963411

申请日：2022-10-11

Applicant: TEXAS INSTRUMENTS INCORPORATED

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

IPC: H04L9/40 ,  H04L9/32

CPC classification number: H04L63/0823 ,  H04L9/3268 ,  H04L63/0428 ,  H04L63/0435 ,  H04L63/0442 ,  H04L63/062 ,  H04L63/0884

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.

公开(公告)号：US11496184B2

公开(公告)日：2022-11-08

申请号：US16852700

申请日：2020-04-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04B3/54 ,  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.

公开(公告)号：US11240216B2

公开(公告)日：2022-02-01

申请号：US16722371

申请日：2019-12-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kumaran Vijayasankar ,  Mehul Soman ,  Arvind Kandhalu Raghu ,  Il Han Kim

IPC: H04L29/06 ,  H04L29/08 ,  H04W12/04 ,  H04W12/06 ,  H04W4/70 ,  H04W12/033

Abstract: A network system comprising a first network element and a second network element. The first network element is programmed to provide the step of first, communicating to the second network element a plurality of configuration parameter sets. Each configuration parameter set corresponds to a respective frame fragment and comprises a parameter value that differs in value from the parameter value in another configuration parameter set in the plurality of configuration parameter sets. The first network element also is programmed to provide the step of second, communicating a frame, to the second network element, in a plurality of frame fragments, wherein each frame fragment in the plurality of frame fragments is communicated according to a respective parameter value in the plurality of configuration parameter sets.