公开(公告)号：US20030188081A1

公开(公告)日：2003-10-02

申请号：US10391024

申请日：2003-03-19

申请人： NEC Engineering, Ltd.

发明人： Kengo Fukushima ,  Hideki Kochii ,  Tetsuya Takeshita

IPC分类号： G06F013/36

CPC分类号： H04L12/40091 ,  H04L12/407

摘要： In a serial bus network, an environment is provided, in which the serial bus is divided to two local buses and a specific terminal connected to one of the local buses can reliably occupy other terminals connected to the other local bus without influence on the terminals connected to the local buses. A specific terminal is connected to a local bus 101, to which an inner portal 3 is connected, and an ID information thereof is preliminarily recorded in a ROM 8. After a power source is turned on, the specific terminal connected to the side of the inner portal 3 is detected according to the ID information from the ROM 8. An ID information of all of nodes connected to a local bus 104, to which an outer portal 4 is connected, is read out and stored in a control portion 5. A bus reset is generated on the local bus 101. In order to give a connection information of the local bus 104, a self-ID packet is generated by the control portion 5 and transmits it through a dedicated PHY 6.

摘要翻译： 在串行总线网络中，提供了一种环境，其中串行总线被分成两个本地总线，并且连接到本地总线之一的特定终端可以可靠地占用连接到另一本地总线的其他终端，而不影响连接的终端 到当地的巴士。 特定终端连接到连接了内部门户3的局部总线101，并且其ID信息被预先记录在ROM 8中。在电源接通之后，连接到 根据来自ROM8的ID信息检测内门3。连接到外门4连接到本地总线104的所有节点的ID信息被读出并存储在控制部分5中。 在本地总线101上产生总线复位。为了给出本地总线104的连接信息，控制部分5生成自身ID分组，并通过专用PHY 6进行发送。

公开(公告)号：US20030081279A1

公开(公告)日：2003-05-01

申请号：US10279832

申请日：2002-10-25

申请人： NEC Engineering, Ltd

发明人： Yoshitaka Uchino

IPC分类号： H04B010/08

CPC分类号： H04B10/032

摘要： Provided is an optical interface which can continuously perform data transmission even in the case where an optical fiber cable breaks down, and can achieve a highly reliable transmission system. The optical interface is for converting full duplex high-speed serial electric signals and the like complied with an IEEE1394.b to optical signals. The optical interface comprises: a double transmission line made up of a main transmission line and a spare transmission line; an malfunction detection unit for detecting a transmission malfunction occurring in the main transmission line; and a switching unit for switching the transmission line from the main transmission line to the spare transmission line when the malfunction detection unit detects a transmission malfunction in the main transmission line. The malfunction detection unit monitors, periodically, the state of signal detection signals transmitted from photoelectric conversion units provided in each of the main transmission line and the spare transmission line.

摘要翻译： 提供了即使在光纤电缆故障的情况下也可以连续地执行数据传输并且可以实现高可靠性的传输系统的光学接口。 光接口用于将符合IEEE1394.b的全双工高速串行电信号转换为光信号。 光接口包括：由主传输线和备用传输线组成的双传输线; 故障检测单元，用于检测在主传输线路中发生的传输故障; 以及切换单元，用于当故障检测单元检测到主传输线路中的传输故障时，将传输线从主传输线路切换到备用传输线路。 故障检测单元周期性地监视从设置在主传输线路和备用传输线路各自中的光电转换单元发送的信号检测信号的状态。