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    • 3. 发明申请
    • DUPLEX MISMATCH DETECTION
    • 双重错配检测
    • WO2007126479B1
    • 2007-12-27
    • PCT/US2007004095
    • 2007-02-15
    • MARVELL WORLD TRADE LTDPANNELL DONALDBARKAN OZDAL
    • PANNELL DONALDBARKAN OZDAL
    • H04L5/14H04L5/16
    • H04L5/1438H04L1/0061H04L5/16H04L12/40032H04L12/413
    • Embodiments of the present invention provide techniques for both ends of a link suffering from duplex mismatch to correct the duplex mismatch. According to some embodiments, the half-duplex end of the link can detect that the other end of the link is in full-duplex mode by detecting late and/or very late collisions, and can correct the duplex mismatch by changing to full-duplex mode. According to some embodiments, the full-duplex end of the link can detect that the other end of the link is in half-duplex mode by one or more techniques including detecting cyclic redundancy check (CRC) errors and frame fragments, and can correct the duplex mismatch by changing to half-duplex mode.
    • 本发明的实施例提供了用于遭受双工失配的链路的两端以校正双工失配的技术。 根据一些实施例,链路的半双工端可以通过检测延迟和/或非常迟的冲突来检测链路的另一端处于全双工模式,并且可以通过改变为全双工来纠正双工失配 模式。 根据一些实施例,链路的全双工端可以通过包括检测循环冗余校验(CRC)误差和帧分段的一种或多种技术来检测链路的另一端处于半双工模式,并且可以校正 通过改变为半双工模式来实现双工不匹配。
    • 4. 发明专利
    • Synchronous network device
    • 同步网络设备
    • JP2013081214A
    • 2013-05-02
    • JP2012264557
    • 2012-12-03
    • Marvell World Trade Ltdマーベル ワールド トレード リミテッド
    • BARKAN OZDAL
    • H04L7/02H03L7/00H04L7/00
    • H04J3/0685G06F1/10H04J3/0688H04J3/0697
    • PROBLEM TO BE SOLVED: To provide a method for clock synchronization between plural ports of a physical layer device and a synchronization device.SOLUTION: A control method includes a step of selecting a port serving as the source of a ground master clock (302). The selected port reproduces the ground master clock on the basis of transmission from a link destination. A multiport PHY IC outputs the RX_CLK of a ground master source port (304). The TX_CLK of the ground master source port is obtained from a local oscillator (306). Then, the TX_CLK of all the other ports are obtained from the output of a clock synchronization unit (308). The synchronization unit causes clock synchronization on the basis of reproduction clock from the multiport PHY IC having the ground master source port (310).
    • 要解决的问题:提供一种用于物理层设备的多个端口与同步设备之间的时钟同步的方法。 解决方案:控制方法包括选择用作接地主时钟源(302)的端口的步骤。 所选择的端口基于从链路目的地的传输再现接地主时钟。 多端口PHY IC输出接地主端口(304)的RX_CLK。 接地主端口的TX_CLK从本地振荡器(306)获得。 然后,从时钟同步单元(308)的输出获得所有其他端口的TX_CLK。 同步单元基于来自具有接地主源端口(310)的多端口PHY IC的再现时钟引起时钟同步。 版权所有(C)2013,JPO&INPIT