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公开(公告)号：US07075283B1
公开(公告)日：2006-07-11
申请号：US11254384
申请日：2005-10-20
申请人： William Lo , Yiqing Guo , Tak Tsui , Tsin-Ho Leung , Runsheng He , Eric Janofsky
发明人： William Lo , Yiqing Guo , Tak Tsui , Tsin-Ho Leung , Runsheng He , Eric Janofsky
IPC分类号： G01R31/11
摘要： A physical layer device including a first port and a second port comprises a cable tester that communicates with the first and second ports and that determines a cable status, which includes an open status, a short status, and a normal status. Opposite ends of a cable selectively communicate with the first and second ports. The cable tester includes a test module that transmits a test pulse on the cable, measures reflection amplitude, calculates a cable length, and determines the cable status based on the measured amplitude and the calculated cable length. A frequency synthesizer communicates with the cable and that selectively outputs a plurality of signals at a plurality of frequencies on the first port. An insertion loss calculator receives the signals on the second port and that estimates insertion loss.
摘要翻译： 包括第一端口和第二端口的物理层设备包括与第一和第二端口通信并且确定包括打开状态，短状态和正常状态的电缆状态的电缆测试器。 电缆的相对端部与第一和第二端口选择性地通信。 电缆测试仪包括一个在电缆上传输测试脉冲的测试模块，测量反射幅度，计算电缆长度，并根据测量的振幅和计算的电缆长度来确定电缆状态。 频率合成器与电缆通信，并且选择性地以第一端口上的多个频率输出多个信号。 插入损耗计算器接收第二端口上的信号并估计插入损耗。
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公开(公告)号：US07002353B1
公开(公告)日：2006-02-21
申请号：US10400864
申请日：2003-03-27
申请人： William Lo , Yiqing Guo , Tak Tsui , Tsin-Ho Leung , Runsheng He , Eric Janofsky
发明人： William Lo , Yiqing Guo , Tak Tsui , Tsin-Ho Leung , Runsheng He , Eric Janofsky
IPC分类号： G01R31/11
摘要： A physical layer device communicates with a second physical layer device over a cable. The physical layer device includes a cable tester that identifies when the second physical layer device is disconnected from the cable. The cable tester includes a test initiating circuit that initiates a cable test when a link is lost, a test module that transmits test pulses on the pairs of the cable, measures reflection amplitudes, calculates cable lengths, and determines whether the pairs have said open status based on said measured amplitude and said calculated cable length, and a reporting circuit that generates a disconnect signal when at least one of the pairs has an open status.
摘要翻译： 物理层设备通过电缆与第二物理层设备通信。 物理层设备包括电缆测试器，其识别何时第二物理层设备与电缆断开连接。 电缆测试器包括测试启动电路，当链路丢失时启动电缆测试，测试模块在电缆对上传输测试脉冲，测量反射幅度，计算电缆长度，并确定对是否具有打开状态 基于所述测量的幅度和所述计算的电缆长度，以及报告电路，当所述对中的至少一个具有打开状态时，生成断开信号。
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公开(公告)号：US06920132B1
公开(公告)日：2005-07-19
申请号：US09583316
申请日：2000-05-30
申请人： William Lo
发明人： William Lo
CPC分类号： H04L49/40 , H04L49/30 , H04L49/351
摘要： A network interface which reduces pin count in an MII or GMII system by logically combining certain signals to eliminate redundancies, thereby enabling one external connection or pin to perform the functions previously performed by multiple pins. In particular, the two connections previously used for TX_EN and TX_ER are reduced to a single TX_CTRL connection. Similarly, the three connections for RX_DV, CRS and RX_ER are reduced to a single RX_CTRL connection. The COL connection is also eliminated.
摘要翻译： 一种网络接口，通过逻辑组合某些信号以消除冗余，从而使一个外部连接或引脚执行先前由多个引脚执行的功能，从而减少MII或GMII系统中的引脚数。 特别地，先前用于TX_EN和TX_ER的两个连接被简化为单个TX_CTRL连接。 类似地，RX_DV，CRS和RX_ER的三个连接被简化为一个RX_CTRL连接。 COL连接也被消除。
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公开(公告)号：US06825672B1
公开(公告)日：2004-11-30
申请号：US10165467
申请日：2002-06-07
申请人： William Lo , Yiqing Guo
发明人： William Lo , Yiqing Guo
IPC分类号： G01R3111
CPC分类号： H04M3/28 , G01R31/021 , G01R31/11
摘要： A cable testing system and method tests cable and determines status, cable length and reflection amplitude. The test module includes a pretest state machine that senses activity on the cable and enables testing if activity is not detected for a first period. A test state machine is enabled by the pretest state machine, transmits a test pulse on the cable, measures a reflection amplitude and calculates a cable length. The test module determines the status based on the measured amplitude and the calculated cable length. A lookup table includes a plurality of sets of reflection amplitudes as a function of cable length. The test module determines the status using the lookup table, the reflection amplitude and the cable length.
摘要翻译： 电缆测试系统和方法测试电缆并确定状态，电缆长度和反射幅度。 测试模块包括一个预测状态机，它检测电缆上的活动，并能够测试在第一个周期内是否没有检测到活动。 测试状态机由预测状态机使能，在电缆上发送测试脉冲，测量反射幅度并计算电缆长度。 测试模块根据测量的幅度和计算的电缆长度来确定状态。 查找表包括作为电缆长度的函数的多组反射幅度。 测试模块使用查找表，反射幅度和电缆长度来确定状态。
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35.发明授权Method and system for increasing network information carried in a data packet via packet tagging 失效用于通过分组标签增加数据包中携带的网络信息的方法和系统
公开(公告)号：US6016308A
公开(公告)日：2000-01-18
申请号：US698185
申请日：1996-08-15
申请人： Ian S. Crayford , William Lo
发明人： Ian S. Crayford , William Lo
CPC分类号： H04L43/00 , H04L12/2602 , H04L12/44 , H04L43/0847 , H04Q2213/13172 , H04Q2213/13293 , H04Q2213/13396
摘要： A method and system for providing statistical network information carried in a data packet being transmitted on a network. The method includes the steps of receiving a data packet having a data portion on a repeater and transferring the data portion to a management unit. The method further includes the step of appending statistical information to the data portion during an inter-packet gap period. The apparatus for increasing information in a data packet on a network includes a repeater mechanism, a management unit mechanism, and a packet tagging circuit. The repeater mechanism receives a data packet having a data portion, the management unit mechanism determines statistical information based on the data packet, and the packet tagging circuit appends information to the data portion of the data packet during an inter-packet gap period.
摘要翻译： 一种在网络上发送的数据包中提供统计网络信息的方法和系统。 该方法包括以下步骤：在中继器上接收具有数据部分的数据分组，并将数据部分传送到管理单元。 该方法还包括在数据包间隔时段期间将统计信息附加到数据部分的步骤。 用于增加网络中的数据分组中的信息的装置包括中继器机制，管理单元机制和分组标签电路。 中继器机构接收具有数据部分的数据分组，管理单元机构基于数据分组确定统计信息，并且分组标签电路在分组间间隔时段期间将信息附加到数据分组的数据部分。
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公开(公告)号：US5960034A
公开(公告)日：1999-09-28
申请号：US566394
申请日：1995-12-01
申请人： William Lo
发明人： William Lo
CPC分类号： H04L12/44
摘要： An apparatus and method for shortening propagation delays of a plurality of repeater circuits that are interconnected to form a single repeater. A tree structure that organizes the plurality of repeater circuit so that an activity signal from one repeater circuit is propagated to other repeater circuits via a multi-branching network wherein a downstream repeater circuit is connected to at least two upstream repeater circuits. Any particular repeater circuit notifies the other repeater circuits, via an expansion bus, of a collision whenever two or more upstream indicator signals are asserted, or when at least one upstream indicator signal is asserted and the particular repeater circuit has one port active, or when the particular repeater circuit has multiple ports active. Each repeater circuit asserts an indicator signal to a downstream repeater circuit whenever one of its upstream indicator signals are active or one of its ports is active. An alternate embodiment provides for selective control of the repeater circuits via a mode control that permits tree operation or uses an external arbiter.
摘要翻译： 一种用于缩短互连以形成单个中继器的多个中继器电路的传播延迟的装置和方法。 一种组织多个中继器电路的树结构，使得来自一个中继器电路的活动信号经由多分支网络传播到其他中继器电路，其中下游中继器电路连接到至少两个上游中继器电路。 任何特定的中继器电路经由扩展总线通知其他中继器电路，每当两个或多个上游指示符信号被断言时，或当至少一个上游指示符信号被断言并且特定的中继器电路具有一个端口有效时，或者当 特定的中继器电路具有多个端口活动。 每个中继器电路每当其上游指示符信号有效或其一个端口有效时，向下游中继器电路断言指示信号。 替代实施例提供了通过允许树操作或使用外部仲裁器的模式控制来选择性地控制中继器电路。
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公开(公告)号：US5654985A
公开(公告)日：1997-08-05
申请号：US653703
申请日：1996-05-23
申请人： Ian S. Crayford , William Lo , Nader Vijeh
发明人： Ian S. Crayford , William Lo , Nader Vijeh
CPC分类号： H04L63/0236 , H04L12/22 , H04L12/46
摘要： A system is provided for use in a network to provide authentication of packets of data, provide security to ensure the prevention of unauthorized receipt of data, to provide improved monitoring of the packets of data transmitted and received over such a network, and to detect changes in the network topology. Repeaters utilized in the network are provided with the capability to detect and interpret packet data and the source address (SA) and destination address (DA) fields to provide the improved features.
摘要翻译： 提供一种在网络中使用的系统来提供数据分组的认证，提供安全性以确保防止未经授权的数据接收，提供对通过这样的网络发送和接收的数据分组的改进的监视，以及检测变化 在网络拓扑。 在网络中使用的中继器具有检测和解释分组数据和源地址（SA）和目的地址（DA）字段以提供改进的特征的能力。
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公开(公告)号：US5581559A
公开(公告)日：1996-12-03
申请号：US406082
申请日：1995-03-17
申请人： Ian S. Crayford , William Lo
发明人： Ian S. Crayford , William Lo
CPC分类号： H04L43/00 , H04L12/22 , H04L12/2602 , H04L12/44 , H04L12/4625 , H04L63/0272 , H04L43/0817
摘要： A method for providing a secure local area network includes the steps of receiving a data packet having a destination address and comparing the destination address to stored end station addresses. The data packet is disrupted on the repeater for the ports except the port with an associated stored end station address matching the destination address. Also, the disrupting of the data packet can be enabled on an individual port basis. A system includes a controller, a memory/comparator, and an inverse disrupt control mechanism. The inverse disrupt control mechanism produces a disrupt signal to disrupt the data packet on non-matching ports of the repeater when a match occurs within the repeater. The data packet is not disrupted on a port linking two repeaters when there is no match within the repeater. The inverse disrupt control can also be enabled or disabled on an individual port basis.
摘要翻译： 一种用于提供安全局域网的方法包括以下步骤：接收具有目的地地址的数据分组，并将目的地地址与存储的终端地址进行比较。 除了端口之外的端口，数据包在中继器中被中断，其中相关联的存储的终端站地址与目的地址匹配。 此外，可以在单个端口上启用数据分组的中断。 一个系统包括一个控制器，一个存储器/比较器和一个反向中断控制机制。 当中继器发生匹配时，逆中断控制机制产生中断信号，以中断中继器的非匹配端口上的数据包。 当中继器中没有匹配时，数据包在连接两个中继器的端口上不会中断。 也可以在单个端口上启用或禁用反向中断控制。
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公开(公告)号：US5566160A
公开(公告)日：1996-10-15
申请号：US338015
申请日：1994-11-10
申请人： William Lo
发明人： William Lo
CPC分类号： H04L12/2602 , H04L43/00 , H04L43/0811 , H04L43/0817 , H04L49/351 , H04L49/40
摘要： Apparatus and method for simply, efficiently and economically accessing every media attachment unit (MAU) management information base (MIB) in a managed repeater. MAU MIBs pass through a repeater to a management unit that accesses the repeater for all of the MAU MIBs, in addition to the repeater MIB. Conversely, the management unit passes MAU control information to the MAUs through the repeater. Because all the MIBs in the managed repeater are accessed through the single device, a simple microprocessor interface is used to connect the repeater to the management unit. Also, the managed repeater signals, by generation of an interrupt for example, any changes in the MAU MIB to the management unit. In addition, the management unit easily determines which MAU caused a particular interrupt because all interrupt status signals are consolidated into registers in the repeater. The status signals are stored in a particular format to assist identification of status conditions for particular MAUs.
摘要翻译： 用于简单，有效和经济地访问被管理中继器中的每个媒体附着单元（MAU）管理信息库（MIB）的设备和方法。 除了中继器MIB之外，MAU MIB通过中继器到达访问所有MAU MIB的中继器的管理单元。 相反，管理单元通过中继器将MAU控制信息传递给MAU。 由于托管中继器中的所有MIB都通过单个设备访问，所以使用简单的微处理器接口将中继器连接到管理单元。 而且，被管理的中继器通过产生例如中断的MAU MIB向管理单元发送任何改变。 此外，管理单元容易确定哪个MAU引起特定中断，因为所有中断状态信号都被合并到中继器中的寄存器中。 状态信号以特定格式存储以帮助识别特定MAU的状态条件。
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公开(公告)号：US5539737A
公开(公告)日：1996-07-23
申请号：US366806
申请日：1994-12-30
申请人： William Lo , Ian Crayford
发明人： William Lo , Ian Crayford
CPC分类号： H04L63/0236 , H04L12/1886 , H04L12/22 , H04L12/44
摘要： A secure repeater implementing data packet masking includes a programmable and selective, on a per port basis, multicast response. A multicast controller receives a multicast identifier extracted from a destination address field of a data packet. A plurality of memories, one associated with each port, determines the associated port's response to the multicast identifier. Each memory stores a multicast control code. When the multicast control code for a particular port has a value indicating that the associated port is enabled to receive multicast packets, assertion of the multicast identifier to the multicast controller for the particular port results in disabling the security masking for the port and subsequent transmission of unmodified data from the particular port.
摘要翻译： 实现数据包掩蔽的安全中继器包括基于每端口的可编程和选择性的多播响应。 组播控制器接收从数据包的目的地地址字段提取的多播标识符。 与每个端口相关联的多个存储器确定关联端口对多播标识符的响应。 每个存储器存储组播控制代码。 当特定端口的组播控制代码具有指示关联的端口被允许接收多播分组的值时，将特定端口的组播标识符断言给组播控制器导致禁用该端口的安全掩蔽并随后传输 来自特定端口的未修改数据。
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