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    Enhanced carrier sense multiple access (CSMA) protocols
    101.
    发明授权
    Enhanced carrier sense multiple access (CSMA) protocols 有权

    公开(公告)号：US09654302B2

    公开(公告)日：2017-05-16

    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 ,  H04B3/54 ,  H04L29/06

    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.

    Power Efficient Tunneled Direct Link Setup Apparatus, Systems and Methods
    104.
    发明申请
    Power Efficient Tunneled Direct Link Setup Apparatus, Systems and Methods 审中-公开
    高效率隧道直接链接设置装置，系统和方法

    公开(公告)号：US20170041970A1

    公开(公告)日：2017-02-09

    申请号：US15289837

    申请日：2016-10-10

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Leonardo William Estevez ,  Ariton Xhafa ,  Ramanuja Vedantham ,  Yanjun Sun

    IPC: H04W76/02

    Abstract: Apparatus, systems, and methods disclosed herein operate to provide wireless communication between personal mobile communication (PMC) devices. An emulated wireless access point (AP) at a first PMC device (PMC1) establishes a first tunneled direct link setup (TDLS) session between a first station module (STA1) incorporated into the PMC1 and a second station module (STA2) incorporated into a second PMC device (PMC2). Following establishment of the TDLS session, the wireless AP is allowed to sleep; and most infrastructure management duties are handled by the STA1 during the session. PMC device battery charge may be conserved as a result. The emulated wireless AP may also establish a second TDLS link to a third station module (STA3) incorporated into a third PMC device (PMC3). The STA1 may then bridge data traffic flow between the STA2 and the STA3. Such bridging operation may enable communication between two PMC devices otherwise unable to decode data received from the other.

    Abstract translation: 本文公开的设备，系统和方法用于提供个人移动通信（PMC）设备之间的无线通信。 在第一PMC设备（PMC1）处的仿真无线接入点（AP）建立在并入到PMC1中的第一站模块（STA1）和并入到PMC1中的第二站模块（STA2）之间的第一隧道直接链路建立（TDLS）会话 第二PMC设备（PMC2）。 在建立TDLS会话后，无线AP被允许睡眠; 大多数基础设施管理职能由STA1在会议期间处理。 因此，可以节省PMC设备电池电量。 仿真无线AP还可以建立到并入第三PMC设备（PMC3）的第三站模块（STA3）的第二TDLS链路。 然后STA1可以桥接STA2和STA3之间的数据业务流。 这种桥接操作可以实现两个PMC设备之间的通信，否则不能解码从另一个接收的数据。

    System and method for avoiding hidden node collisions in a communication network
    105.
    发明授权
    System and method for avoiding hidden node collisions in a communication network 有权
    避免通信网络隐藏节点冲突的系统和方法

    公开(公告)号：US09450708B2

    公开(公告)日：2016-09-20

    申请号：US14246872

    申请日：2014-04-07

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Kumaran Vijayasankar ,  Ram Krishnan ,  Ramanuja Vedantham

    IPC: H04L1/16 ,  H04L29/08

    CPC classification number: H04L1/16 ,  H04L1/1671 ,  H04L69/324

    Abstract: Method and apparatus for avoiding hidden node collisions in a communication network. A network communication device includes a packet transmitter. The packet transmitter is configured to subdivide a packet to be transmitted via a communication network into a plurality of segments based on the packet exceeding a predetermined maximum size, and to sequentially transmit the segments via the communication network. The packet transmitter is also configured to construct an acknowledgement packet responsive to reception of each segment of a packet received via the communication network. The acknowledgement packet includes a field indicating whether an additional segment of the packet is to be transmitted via the communication network. The packet transmitter is further configured to transmit the acknowledgement packet via the communication network.

    Abstract translation: 用于避免通信网络中的隐藏节点冲突的方法和装置。 网络通信设备包括分组发射机。 分组发送器被配置为基于超过预定最大大小的分组将要经由通信网络发送的分组分割成多个分段，并且经由通信网络顺序发送分组。 分组发射机还被配置为响应于经由通信网络接收到的分组的每个分段的接收来构造确认分组。 确认分组包括指示是否要经由通信网络发送分组的附加分段的字段。 分组发射机还被配置为经由通信网络发送确认分组。

    ASYMMETRIC CHANNELS IN POWER LINE COMMUNICATIONS
    106.
    发明申请
    ASYMMETRIC CHANNELS IN POWER LINE COMMUNICATIONS 审中-公开
    电力线通信中的不对称通道

    公开(公告)号：US20160119027A1

    公开(公告)日：2016-04-28

    申请号：US14990471

    申请日：2016-01-07

    Applicant: Texas Instruments Incorporated

    Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  IL Han Kim

    IPC: 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。

    Long Preamble and Duty Cycle Based Coexistence Mechanism for Power Line Communication (PLC) Networks
    108.
    发明申请
    Long Preamble and Duty Cycle Based Coexistence Mechanism for Power Line Communication (PLC) Networks 审中-公开
    电力线通信（PLC）网络的长序列和占空比共存机制

    公开(公告)号：US20150349844A1

    公开(公告)日：2015-12-03

    申请号：US14824506

    申请日：2015-08-12

    Applicant: Texas Instruments Incorporated

    Inventor： Kumaran Vijayasankar ,  Ramanuja Vedantham ,  Tarkesh Pande

    IPC: H04B3/54

    CPC classification number: H04B3/54 ,  H04B2203/5408 ,  H04B2203/5416 ,  H04B2203/5433 ,  H04B2203/5445

    Abstract: Embodiments of methods and systems for supporting coexistence of multiple technologies in a Power Line Communication (PLC) network are disclosed. A long coexistence preamble sequence may be transmitted by a device that has been forced to back off the PLC channel multiple times. The long coexistence sequence provides a way for the device to request channel access from devices on the channel using other technology. The device may transmit a data packet after transmitting the long coexistence preamble sequence. A network duty cycle time may also be defined as a maximum allowed duration for nodes of the same network to access the channel. When the network duty cycle time occurs, all nodes will back off the channel for a duty cycle extended inter frame space before transmitting again. The long coexistence preamble sequence and the network duty cycle time may be used together.

    Abstract translation: 公开了用于支持电力线通信（PLC）网络中的多种技术共存的方法和系统的实施例。 长时间的共存前导序列可以被被强制退出PLC信道的设备多次发送。 长的共存序列为设备提供了一种使用其他技术从信道上的设备请求信道访问的方法。 在发送长共存前导序列之后，设备可以发送数据分组。 网络占空比时间也可以被定义为同一网络的节点访问信道的最大允许持续时间。 当发生网络占空比时间时，所有节点将在再次发送之前退出占空比扩展帧间间隔的信道。 长共存前序序列和网络占空比时间可以一起使用。

    Efficient fairness allocation in powerline CSMA/CA protocols
    109.
    发明授权
    Efficient fairness allocation in powerline CSMA/CA protocols 有权
    电力线CSMA / CA协议的有效公平分配

    公开(公告)号：US09198198B2

    公开(公告)日：2015-11-24

    申请号：US14254410

    申请日：2014-04-16

    Applicant: Texas Instruments Incorporated

    Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar

    IPC: H04B3/54 ,  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。

    ELECTRIC VEHICLE AND SERVICE EQUIPMENT ON A PILOT WIRE
    110.
    发明申请
    ELECTRIC VEHICLE AND SERVICE EQUIPMENT ON A PILOT WIRE 审中-公开
    导线上的电动车辆和维修设备

    公开(公告)号：US20150229458A1

    公开(公告)日：2015-08-13

    申请号：US14691789

    申请日：2015-04-21

    Applicant: Texas Instruments Incorporated

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

    IPC: H04L5/00 ,  H04L12/413 ,  H04L27/26 ,  H04L25/49 ,  H04B3/54

    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。

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