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    Authentication of Networked Devices Having Low Computational Capacity
    22.
    发明申请
    Authentication of Networked Devices Having Low Computational Capacity 审中-公开
    具有低计算能力的网络设备的认证

    公开(公告)号：US20170063843A1

    公开(公告)日：2017-03-02

    申请号：US15222524

    申请日：2016-07-28

    Applicant: Texas Instruments Incorporated

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

    IPC: H04L29/06 ,  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.

    Abstract translation: 用于通过网络进行安全通信的有限计算资源的网络设备的认证。 设备的认证开始于请求者节点向代理节点发送具有其认证凭证的签名数字证书。 在验证证书后，代理节点然后通过网络可访问的认证服务器来认证请求方的凭据，充当请求方节点的代理。 通常，该验证包括根据公共/私人密钥方案的解密。 成功认证后，认证服务器为请求方节点创建会话密钥，并将其与代理节点进行通信。 代理节点用对称密钥加密会话密钥，并将加密的会话密钥发送给请求方节点，该请求者节点在解密之后使用会话密钥进行安全通信。 在一些实施例中，认证服务器用对称密钥加密会话密钥。

    Channel selection in power line communications
    23.
    发明授权
    Channel selection in power line communications 有权
    电力线通信中的通道选择

    公开(公告)号：US09219526B2

    公开(公告)日：2015-12-22

    申请号：US14630990

    申请日：2015-02-25

    Applicant: Texas Instruments Incorporated

    Inventor： Shu Du ,  Anand G. Dabak ,  Xiaolin Lu ,  Il Han Kim

    IPC: H04B3/54 ,  H04L12/10 ,  H04L12/26 ,  H04L7/00

    CPC classification number: H04B3/54 ,  H04B3/544 ,  H04B2203/5408 ,  H04B2203/5466 ,  H04B2203/5495 ,  H04L7/00 ,  H04L12/10 ,  H04L43/0823

    Abstract: Systems for channel selection in power line communications (PLC) are described. In some embodiments, a PLC device may include a processor and a memory. The memory stores instructions executable by the processor to cause the PLC device perform operations. One or more time slots in each of a plurality of frequency bands are sequentially scanned. A packet transmitted by a second PLC device to the PLC device over one of the plurality of frequency bands is detected. Additional packets received from the second PLC device are synchronized across the plurality of frequency bands based, at least in part, upon the detected packet. The additional packets are organized in a plurality of frames. Each of the plurality of frames having been transmitted by the second PLC device to the PLC device over a respective one of the plurality of frequency bands. Each frame has a plurality of time slots, and each time slot has a pair of beacon and bandscan packets.

    Abstract translation: 描述了电力线通信（PLC）中通道选择的系统。 在一些实施例中，PLC设备可以包括处理器和存储器。 存储器存储可由处理器执行以使PLC设备执行操作的指令。 顺序地扫描多个频带中的每一个中的一个或多个时隙。 检测由第二PLC设备通过多个频带中的一个发送到PLC设备的分组。 至少部分地基于检测到的分组，从第二PLC设备接收的附加分组跨多个频带同步。 附加分组被组织成多个帧。 多个帧中的每一个已经由第二PLC设备通过多个频带中的相应一个发送到PLC设备。 每个帧具有多个时隙，并且每个时隙具有一对信标和带扫描分组。

    Carrier sense multiple access (CSMA) protocols for power line communications (PLC)
    24.
    发明授权
    Carrier sense multiple access (CSMA) protocols for power line communications (PLC) 有权
    电力线通信（PLC）的载波侦听多路访问（CSMA）协议

    公开(公告)号：US09094234B2

    公开(公告)日：2015-07-28

    申请号：US14264676

    申请日：2014-04-29

    Applicant: Texas Instruments Incorporated

    Inventor： Shu Du ,  Robert W. Liang ,  Xiaolin Lu

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

    CPC classification number: H04L12/413 ,  H04B3/544 ,  H04L5/0096

    Abstract: Systems and methods for carrier sense multiple access (CSMA) protocols for power line communications (PLC) are described. In some embodiments, a method may include performing a virtual carrier sensing operation and, in response to the virtual carrier sensing operation indicating that a communication channel is idle, calculating a contention window. The method may also include performing a physical carrier sensing operation subsequent to the virtual carrier sensing operation, the physical carrier sensing operation based, at least in part, upon the contention window. In response to the physical carrier sensing operation indicating that the communication channel is idle, the method may then include transmitting data over the channel. In other embodiments, another method may include determining that a data transmission is a unicast transmission and that an acknowledgement message has not been received. The method may further include incrementing a backoff parameter and repeating one or more carrier sense operations.

    Abstract translation: 描述了用于电力线通信（PLC）的载波侦听多路访问（CSMA）协议的系统和方法。 在一些实施例中，方法可以包括执行虚拟载波侦听操作，并且响应于指示通信信道空闲的虚拟载波侦听操作，计算竞争窗口。 该方法还可以包括在虚拟载波感测操作之后执行物理载波感测操作，至少部分地基于竞争窗口进行物理载波感测操作。 响应于指示通信信道空闲的物理载波感测操作，该方法然后可以包括通过信道发送数据。 在其他实施例中，另一种方法可以包括确定数据传输是单播传输，还没有接收到确认消息。 该方法还可以包括增加退避参数并重复一个或多个载波检测操作。

    MAC EXTENSIONS FOR SMART ANTENNA SUPPORT
    25.
    发明申请
    MAC EXTENSIONS FOR SMART ANTENNA SUPPORT 有权
    MAC天线支持的扩展

    公开(公告)号：US20140133404A1

    公开(公告)日：2014-05-15

    申请号：US14158341

    申请日：2014-01-17

    Applicant: Texas Instruments Incorporated

    Inventor： Jin-Meng Ho ,  Donald P. Shaver ,  Xiaolin Lu

    IPC: H04W28/06

    CPC classification number: H04W24/02 ,  H04B7/04 ,  H04L1/0006 ,  H04L1/1621 ,  H04L1/1671 ,  H04L49/9057 ,  H04W28/06 ,  H04W28/065

    Abstract: Apparatus and methods implement aggregation frames and allocation frames. The aggregation frames include a plurality of MSDUs or fragments thereof aggregated or otherwise combined together. An aggregation frame makes more efficient use of the wireless communication resources. The allocation frame defines a plurality of time intervals. The allocation frame specifies a pair of stations that are permitted to communicate with each other during each time interval as well as the antenna configuration to be used for the communication. This permits stations to know ahead of time when they are to communicate, with which other stations and the antenna configuration that should be used. A buffered traffic field can also be added to the frames to specify how much data remains to be transmitted following the current frame. This enables network traffic to be scheduled more effectively.

    Abstract translation: 装置和方法实现聚合帧和分配帧。 聚合帧包括聚合或以其他方式组合在一起的多个MSDU或其片段。 聚合帧更有效地利用无线通信资源。 分配帧定义多个时间间隔。 分配帧指定在每个时间间隔期间允许彼此通信的一对站以及要用于通信的天线配置。 这样就可以让站台在进行通信时提前知道，哪些其他站点和应该使用的天线配置。 还可以将缓冲的业务字段添加到帧，以指定在当前帧之后剩余多少数据被发送。 这样可以更有效地安排网络流量。

    Advanced switch node selection for power line communications network
    26.
    发明授权
    Advanced switch node selection for power line communications network 有权

    公开(公告)号：US12255783B2

    公开(公告)日：2025-03-18

    申请号：US18465219

    申请日：2023-09-12

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Ramanuja Vedantham ,  Kumaran Vijayasankar ,  Xiaolin Lu

    IPC: H04L41/12 ,  H04B3/00 ,  H04B3/46 ,  H04B3/54

    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.

    Scheduler for power-efficient time slotted protocol
    27.
    发明授权
    Scheduler for power-efficient time slotted protocol 有权

    公开(公告)号：US12150136B2

    公开(公告)日：2024-11-19

    申请号：US17402688

    申请日：2021-08-16

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Arvind K. Raghu ,  Ariton E. Xhafa ,  Ramanuja Vedantham ,  Xiaolin Lu

    IPC: H04W72/23 ,  H04W72/1273

    Abstract: A network includes a parent node and at least one child node configured to communicate with the parent node via a wireless network protocol. The parent node includes a broadcast coordinator to transmit a broadcast message from the parent node to the child node at predetermined time intervals according to the wireless network protocol. A scheduler generates a scheduling packet that is communicated in the broadcast message. The scheduling packet includes a data field to instruct each child node to activate and receive data communicated from the parent node in a prescribed time slot following the broadcast message that is defined by the scheduling packet.

    SOLAR PANEL DISCONNECT AND REACTIVATION SYSTEM
    30.
    发明申请
    SOLAR PANEL DISCONNECT AND REACTIVATION SYSTEM 有权

    公开(公告)号：US20230081820A1

    公开(公告)日：2023-03-16

    申请号：US18053405

    申请日：2022-11-08

    Applicant: TEXAS INSTRUMENTS INCORPORATED

    Inventor： Il Han Kim ,  Xiaolin Lu

    IPC: H02S50/00 ,  H02S40/32 ,  H02S40/34 ,  H02J3/38 ,  H02J3/46

    Abstract: A photovoltaic system with an inverter, at least one solar panel for providing electrical power, and electrical wiring for coupling electrical power from the at least one solar panel to the inverter. Also included is a transmitter for transmitting a messaging protocol along the electrical wiring, where the protocol includes a multibit wireline signal. Also included is circuitry for selectively connecting the electrical power from the at least one solar panel along the electrical wiring to the inverter in response to the messaging protocol.

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