知搜-全球专利检索

  1. 登录
  2. 注册

搜索结果

801 条记录 (耗时 0.02 秒)

    LONG PREAMBLE AND DUTY CYCLE BASED COEXISTENCE MECHANISM FOR POWER LINE COMMUNICATION (PLC) NETWORKS
    3.
    发明公开
    LONG PREAMBLE AND DUTY CYCLE BASED COEXISTENCE MECHANISM FOR POWER LINE COMMUNICATION (PLC) NETWORKS 审中-公开

    公开(公告)号：US20230327705A1

    公开(公告)日：2023-10-12

    申请号：US18333659

    申请日：2023-06-13

    申请人： Texas Instruments Incorporated

    发明人： Kumaran VIJAYASANKAR ,  Ramanuja VEDANTHAM ,  Tarkesh PANDE

    IPC分类号： H04B3/54

    CPC分类号： H04B3/54 ,  H04B2203/5408 ,  H04B2203/5416 ,  H04B2203/5433 ,  H04B2203/5445

    摘要： 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.

    Communication system
    5.
    发明授权
    Communication system 有权

    公开(公告)号：US09929773B2

    公开(公告)日：2018-03-27

    申请号：US15468738

    申请日：2017-03-24

    申请人： Yazaki Corporation

    发明人： Akiyoshi Kanazawa ,  Atsushi Takahashi ,  Kazuo Sugimura ,  Takaaki Izawa

    IPC分类号： H04L23/00 ,  H04B1/16 ,  H04B3/54 ,  H04B3/32

    CPC分类号： H04B3/54 ,  H04B3/32 ,  H04B3/548 ,  H04B2203/5416 ,  H04B2203/5425 ,  H04B2203/5491

    摘要： A slave control device receives a communication signal from a master control device, and controls loads according to the received communication signal. A modulator superimposes the communication signal from the master control device on power source lines, and a demodulator demodulates the communication signal superimposed on the power source lines and supplies the demodulated communication signal to the slave control device. The modulator is provided on power source lines on a battery side, and the demodulator is provided on the power source lines on a load side. The modulator superimposes the communication signal on the power source lines which are on a side closer to the loads with respect to the modulator among the power source lines.

    System for transmission of data and power
    9.
    发明授权
    System for transmission of data and power 有权

    公开(公告)号：US09698870B2

    公开(公告)日：2017-07-04

    申请号：US15104942

    申请日：2014-12-05

    申请人： Ultra Electronics Limited

    发明人： Francis Stratford ,  Kevin Chinn

    IPC分类号： H04B3/54 ,  H04L5/00 ,  H04L29/12

    CPC分类号： H04B3/548 ,  H04B3/54 ,  H04B2203/5416 ,  H04B2203/5458 ,  H04B2203/547 ,  H04B2203/5483 ,  H04L5/0007 ,  H04L61/2007

    摘要： A system for transmission of data and electrical power comprising: a plurality of independent power sources, each one of the plurality of independent power sources being connected to a respective one of a plurality of electrical power lines; and a modulator configured to modulate a carrier signal with a data signal received at an input of the modulator so as to generate a modulated carrier signal at an output thereof, wherein the output of the modulator is coupled to each of the plurality of electrical power lines, to permit transmission of the modulated carrier signal over the plurality of electrical power lines, such that the plurality of electrical power lines form a data network while maintaining electrical isolation between each of the plurality of electrical power lines.

    Outbound interference reduction in a broadband powerline system
    10.
    发明授权
    Outbound interference reduction in a broadband powerline system 有权
    宽带电力线系统的出站干扰减少

    公开(公告)号：US09577706B2

    公开(公告)日：2017-02-21

    申请号：US14551582

    申请日：2014-11-24

    申请人： AT&T Intellectual Property II, L.P.

    发明人： Paul Shala Henry

    IPC分类号： H04B3/30 ,  H04J1/08 ,  H04L25/10 ,  H04L25/02 ,  H04B3/54 ,  H04B3/56

    CPC分类号： H04B3/30 ,  H04B3/54 ,  H04B3/542 ,  H04B3/56 ,  H04B2203/5416 ,  H04B2203/5425 ,  H04B2203/5483 ,  H04J1/08 ,  H04L5/0005 ,  H04L25/028 ,  H04L25/10

    摘要： Disclosed is a method and apparatus for reducing outbound interference in a broadband powerline communication system. Data is modulated on first and second carrier frequencies and is transmitted via respective first and second lines of the powerline system. A characteristic of at least one of the carrier signals (e.g., phase or amplitude) is adjusted in order to improve the electrical balance of the lines of the transmission system. This improvement in electrical balance reduces the radiated interference of the powerline system. Also disclosed is the use of a line balancing element on or more lines of the powerline system for altering the characteristics of at least one of the power lines in order to compensate for a known imbalance of the transmission system.

    摘要翻译： 公开了一种用于减少宽带电力线通信系统中的出站干扰的方法和装置。 数据在第一和第二载波频率上被调制，并且经由电力线系统的相应的第一和第二线传输。 为了改善传输系统的线路的电气平衡，调整载波信号（例如，相位或幅度）中的至少一个的特性。 电气平衡的这种改进降低了电力线系统的辐射干扰。 还公开了在电力线系统的一行或多行线路上使用线路平衡元件来改变至少一条电力线路的特性，以便补偿传输系统的已知不平衡。