公开(公告)号：US09531563B2

公开(公告)日：2016-12-27

申请号：US14949069

申请日：2015-11-23

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar

IPC: H04L12/413 ,  H04W74/08 ,  H04B3/54 ,  H04L1/00 ,  H04L5/00

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.

公开(公告)号：US09356762B2

公开(公告)日：2016-05-31

申请号：US14691789

申请日：2015-04-21

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Gang Gary Xu ,  Donald P. Shaver

IPC: H03K7/08 ,  H03K9/08 ,  H04L5/00 ,  H04B1/38 ,  H04L25/49 ,  H04L12/40 ,  H04B3/54 ,  H04L12/413 ,  H04L27/26

CPC classification number: H04L5/0062 ,  H04B1/38 ,  H04B3/544 ,  H04L5/0046 ,  H04L5/0091 ,  H04L12/4013 ,  H04L12/40189 ,  H04L12/413 ,  H04L25/4902 ,  H04L27/2611 ,  H04L2012/40215 ,  H04L2012/40273

Abstract: Electric Vehicle Service Equipment (EVSE) and Electric Vehicle (EV) are disclosed n. In an example embodiment, a modem is coupled to the pilot wire that couples the EVSE and the EV. The modem transmits both pulse width modulation (PWM) command signals and power line communication (PLC) signals to a remote device via the pilot wire. The modem interleaves the PWM and PLC signals on the pilot wire so that latency requirements for the PWM signals are maintained. The modem supports parallel protocol stacks in which PLC signals are processed in a first path and PWM signals are processed in a second path that bypasses the first path and provides the PWM signals directly to a MAC layer. The modem may create a modified frame for the PLC signals to maintain the latency requirements.

Abstract translation: 电动车服务设备（EVSE）和电动车（EV） 在示例性实施例中，调制解调器耦合到耦合EVSE和EV的导频线。 调制解调器通过导频线向远程设备发送脉宽调制（PWM）指令信号和电力线通信（PLC）信号。 调制解调器在导线上交织PWM和PLC信号，以保持PWM信号的延迟要求。 调制解调器支持并行协议栈，其中PLC信号在第一路径中被处理，并且PWM信号在绕过第一路径的第二路径中被处理并且将PWM信号直接提供给MAC层。 调制解调器可以为PLC信号创建一个修改的帧，以维持等待时间要求。

公开(公告)号：US20160119028A1

公开(公告)日：2016-04-28

申请号：US14985898

申请日：2015-12-31

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04B3/54 ,  H04L12/413

CPC classification number: H04B3/544 ,  H04B2203/5408 ,  H04B2203/5433 ,  H04B2203/5445 ,  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.

Abstract translation: 公开了一种用于在PLC节点中设置载波感测机构的系统和方法。 在PLC标准中，通过使节点检测到公共前同步码并通过共存帧间空间（cEIFS）时间段进行后退来实现共存，以帮助节点避免干扰其他技术。 在一个实施例中，PHY原语从PHY发送到MAC，知道已经有前导码检测。 可以使用两级指示 - 在解码整个帧之后接收到前导码和其他指示之后的一个指示。 MAC基于前导码检测设置载波侦听机制。

公开(公告)号：US09319238B2

公开(公告)日：2016-04-19

申请号：US14637262

申请日：2015-03-03

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04L12/413 ,  H04L12/927 ,  H04L12/40 ,  H04B3/54 ,  H04L12/28

CPC classification number: H04L12/413 ,  H04B3/542 ,  H04B2203/5433 ,  H04L12/283 ,  H04L12/40156 ,  H04L47/805 ,  H04L2012/2843

Abstract: Embodiments of a power line communication (PLC) transmitter device for overlapping priority contention windows are presented. A processor is configured to perform a physical channel sense operation to detect an idle channel on a PLC network. A transmitter transmits a normal priority data packet on the channel during a high priority contention window. In another embodiment, a Normal Priority Contention Window (NPCW) is allowed to overlap with a High Priority Contention Window (HPCW). The minimum contention window for the normal priority frames (i.e., NPCW) is equal to or longer than the contention window for high priority frames (i.e., HPCW). By making the NPCW longer than the HPCW, the high priority frames will have a better chance than normal priority frames to get access to the channel on transmission reattempts.

Abstract translation: 提出了用于重叠优先级争用窗口的电力线通信（PLC）发射机设备的实施例。 处理器被配置为执行物理信道检测操作以检测PLC网络上的空闲信道。 发射机在高优先权竞争窗口期间在信道上发送普通优先级数据分组。 在另一个实施例中，允许正常优先权竞争窗口（NPCW）与高优先权争用窗口（HPCW）重叠。 正常优先级帧（即NPCW）的最小竞争窗口等于或大于高优先级帧（即HPCW）的争用窗口。 通过使NPCW比HPCW长，高优先级帧将比正常优先级帧更有可能在传输重新尝试时访问该信道。

公开(公告)号：US09300361B2

公开(公告)日：2016-03-29

申请号：US14576334

申请日：2014-12-19

Applicant: Texas Instruments Incorporated

Inventor： Ramanuja Vedantham ,  Anand Dabak ,  Tarkesh Pande

IPC: H04B3/00 ,  H04B3/54

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 detecting a communication from foreign PLC device on a PLC network in response to a foreign preamble received by the PLC device, terminating transmissions to the PLC network for a network-specific co-existence Extended Interframe Space (cEIFS) time period in response to the foreign preamble, and resuming transmissions to the PLC network after expiration of the network-specific time period.

公开(公告)号：US09282504B2

公开(公告)日：2016-03-08

申请号：US14825245

申请日：2015-08-13

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Robert Liang

IPC: H04W48/10 ,  H04W4/00 ,  H04W24/04 ,  H04B3/54 ,  H04L12/24 ,  H04W48/00

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 active discovering and 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主动发现和识别在个人操作中操作的一个或多个网络的至少一个自举代理和个人区域网络（PAN）标识符 PLC设备的空间。 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。

公开(公告)号：US09264103B2

公开(公告)日：2016-02-16

申请号：US14010267

申请日：2013-08-26

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Kamaran Vijayasankar ,  Ramanuja Vedantham ,  Il Han Kim

IPC: H04B3/54

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.

公开(公告)号：US20160014638A1

公开(公告)日：2016-01-14

申请号：US14860154

申请日：2015-09-21

Applicant: Texas Instruments Incorporated

Inventor： Ariton E. Xhafa ,  Yanjun Sun ,  Ramanuja Vedantham

IPC: H04W28/06

CPC classification number: H04W28/065 ,  H04L1/1854 ,  H04W28/04 ,  H04W84/12 ,  H04W84/18 ,  H04W88/06

Abstract: A wireless combination device is coupled to an antenna for communicating via a first wireless network. A second wireless transceiver configured for communication via said second wireless network. A packet aggregator is coupled to the first wireless transceiver configures a frame aggregated packet for at least a portion of activities on the first wireless network. The frame aggregated packet includes a plurality of data packets and a dummy packet or spoofing so that said frame aggregated packet is extended in time or indicates an extension sufficient to overlap a Tx time interval or Rx time interval for communications occurring over a second wireless network. The first wireless network and said second wireless network are overlapping networks.

Abstract translation: 无线组合设备被耦合到天线，用于经由第一无线网络进行通信。 配置用于经由所述第二无线网络进行通信的第二无线收发器。 耦合到第一无线收发器的分组聚合器为第一无线网络上的活动的至少一部分配置帧聚合分组。 帧聚合分组包括多个数据分组和虚拟分组或欺骗，使得所述帧聚合分组在时间上被扩展或指示足以与通过第二无线网络发生的通信的Tx时间间隔或Rx时间间隔重叠的扩展。 第一无线网络和所述第二无线网络是重叠的网络。

公开(公告)号：US09231658B2

公开(公告)日：2016-01-05

申请号：US13923097

申请日：2013-06-20

Applicant: Texas Instruments Incorporated

Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

IPC: H04J3/02 ,  H04B3/54

CPC classification number: H04B3/544 ,  H04B2203/5408 ,  H04B2203/5433 ,  H04B2203/5445 ,  H04L12/413

Abstract: Systems and methods for setting a Network Allocation Vector (NAV) 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 NAV to EIFS if a native preamble is detected. The MAC sets NAV to cEIFS if only a coexistence preamble is detected or if a non-native preamble is detected.

Abstract translation: 公布了在PLC节点中设置网络分配向量（NAV）的系统和方法。 在PLC标准中，通过使节点检测到公共前同步码并通过共存帧间空间（cEIFS）时间段进行后退来实现共存，以帮助节点避免干扰其他技术。 在一个实施例中，PHY原语从PHY发送到MAC，知道已经有前导码检测。 可以使用两级指示 - 在解码整个帧之后接收到前导码和其他指示之后的一个指示。 如果检测到本机前导码，则MAC将NAV设置为EIFS。 如果仅检测到共存前导码或者是否检测到非本地前导码，则MAC将NAV设置为cEIFS。

公开(公告)号：US20150244541A1

公开(公告)日：2015-08-27

申请号：US14706118

申请日：2015-05-07

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: Systems and methods for enhanced carrier sense multiple access (CSMA) protocols are described. In various implementations, these systems and methods may be applicable to Power Line Communications (PLC). For example, a method 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以发送帧，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。