Communication link apparatus and method for maintaining visibility in visible light communication
    2.
    发明授权
    Communication link apparatus and method for maintaining visibility in visible light communication 有权
    用于保持可见光通信中的可视性的通信链路装置和方法

    公开(公告)号:US08320768B2

    公开(公告)日:2012-11-27

    申请号:US12217550

    申请日:2008-07-07

    IPC分类号: H04B10/00

    CPC分类号: H04B10/1143 H04B10/116

    摘要: A system and method for continuing a communication link while maintaining visibility in visible light communication. A frame is transmitted by a sender for establishing a communication link before data transmission to a receiver by a sender. A receiver sends a response frame that reports on establishment of the communication link prior to data transmission by the sender. A data frame containing information is transmitted by the sender to the receiver. An acknowledgment frame is transmitted to the sender in response to the data frame. A disconnect frame is transmitted by the sender which is acknowledged by the receiver. A visible sequence is transmitted during a time period when the sender and the receiver do not transmit respective frames for communication to maintain visibility between two devices that may be communicating otherwise by, for example, infrared communication.

    摘要翻译: 一种用于在保持可见光通信中的可视性的同时继续通信链路的系统和方法。 由发送者发送一帧,以便在由发送者向接收者发送数据之前建立通信链路。 接收器发送响应帧,该响应帧在发送者发送数据之前报告建立通信链路。 包含信息的数据帧由发送器发送到接收器。 响应于数据帧,确认帧被发送到发送器。 由接收者确认的发送方发送断开帧。 在发送方和接收方不发送用于通信的各个帧的时间段期间发送可见序列,以保持可能通过例如红外通信而通信的两个设备之间的可见性。

    Wireless communication interface for portable wireless terminal
    4.
    发明授权
    Wireless communication interface for portable wireless terminal 失效
    便携式无线终端的无线通信接口

    公开(公告)号:US08204383B2

    公开(公告)日:2012-06-19

    申请号:US11978839

    申请日:2007-10-30

    IPC分类号: H04B1/38 H04B10/10

    CPC分类号: H04M1/7253 H04M1/22

    摘要: A wireless communication interface for a portable wireless terminal and a system for wirelessly communicating by a portable wireless terminal with another device via a free space. The interface facilitates aligning the portable wireless device with another devices for improved communication. The interface including: a light source for generating a data-modulated visible light signal and outputting the visible light signal to the free space; an optical detector for generating an electrical signal by photoelectrically converting the visible light signal input from the free space, and for outputting the electrical signal. A demodulation unit demodulates the electrical signal input from the optical detector, and outputs a data signal.

    摘要翻译: 一种用于便携式无线终端的无线通信接口和用于由便携式无线终端经由自由空间与另一设备进行无线通信的系统。 该接口便于将便携式无线设备与另一设备对准以改善通信。 该接口包括:用于产生数据调制的可见光信号并将可见光信号输出到自由空间的光源; 光学检测器,用于通过对从自由空间输入的可见光信号进行光电转换并输出电信号来产生电信号。 解调单元解调从光学检测器输入的电信号,并输出数据信号。

    Method for providing visible light communication in a visible light communication system
    5.
    发明授权
    Method for providing visible light communication in a visible light communication system 有权
    在可见光通信系统中提供可见光通信的方法

    公开(公告)号:US08019230B2

    公开(公告)日:2011-09-13

    申请号:US12220591

    申请日:2008-07-25

    IPC分类号: H04B10/00

    摘要: A method of providing a visible light communication in a data link layer of a visible light communication system adopting an infrared communication link connection protocol includes: broadcasting a discovery exchange station identification (D-XID) frame; generating a visible frame to provide a visibility to a link for a specified waiting time period for responding to the broadcast D-XID frame; exchanging a set normal response mode (SNRM) frame and an unnumbered acknowledgement (UA) frame for requesting a link setting between the transmitting and receiving terminals; generating visible frames for a waiting time for receiving the SNRM frame and the UA frame; exchanging an information transfer frame (I-frame) and a receive ready (RR) frame, which is a response to the I-frame, between the transmitting and receiving terminals; and generating visible frames for a specified waiting period for receiving the I-frame and the RR frame.

    摘要翻译: 在采用红外通信链路连接协议的可见光通信系统的数据链路层提供可见光通信的方法包括:广播发现交换站识别(D-XID)帧; 产生可见帧以提供对指定等待时间段的链接的可见性,以响应广播D-XID帧; 交换设置的正常响应模式(SNRM)帧和用于请求发送和接收终端之间的链路设置的无编号确认(UA)帧; 产生用于接收SNRM帧和UA帧的等待时间的可见帧; 在发送和接收终端之间交换作为对I帧的响应的信息传送帧(I帧)和接收就绪(RR)帧; 并产生用于接收I帧和RR帧的指定等待周期的可见帧。