公开(公告)号：US06347089B1

公开(公告)日：2002-02-12

申请号：US09108571

申请日：1998-07-01

申请人： Tak-Lap Tsui ,  Jun Yu ,  Lian-Sheng Xie

发明人： Tak-Lap Tsui ,  Jun Yu ,  Lian-Sheng Xie

IPC分类号： H04L1228

CPC分类号： H04L49/351 ,  H04L49/201 ,  H04L49/30

摘要： The present invention includes an Ethernet frame switching system for receiving and transmitting data frames from and to a plurality of ports. The frame switching system includes a plurality of port control units for managing the transmission and reception procedural processes with a physical layer device. The frame switching system further includes a queue management unit (QMU) connected with data buses to the port control unit. The data frames received from or transmitted to the port control unit are managed by the QMU that these data frames received are transmitted directly to and data frame for transmission or retrieved directly from a single shared data frame buffer such that the local data frame buffer is not required in each of the port control units. Without these local data buffers, the QMU applies a novel link list queue management process to complete the writing and reading of data frame for transfer over the data bus in a single time-division multiplexed time slot such that no loss of data frame occurs. The data frame queue management further include a special technique for managing the broadcast frames by employing a broadcast frame counter together with the link list management scheme. The first-in-first-out order is maintained in combination with the unicast frames without requiring multiple data frame storage slots for the broadcasting frames such that high through put of frame switching is achieved without imposing additional memory requirements.

摘要翻译： 本发明包括一个用于从多个端口接收和发送数据帧的以太网帧交换系统。 帧切换系统包括多个端口控制单元，用于使用物理层设备来管理发送和接收过程过程。 帧切换系统还包括与数据总线连接到端口控制单元的队列管理单元（QMU）。 从端口控制单元接收到或发送到端口控制单元的数据帧由QMU管理，这些数据帧被直接发送到数据帧，并直接从单个共享数据帧缓冲器检索，以便本地数据帧缓冲器不是 需要在每个港口控制单位。 没有这些本地数据缓冲器，QMU应用新颖的链路列表队列管理过程，以完成数据帧的写入和读取，以便在单个时分复用时隙中通过数据总线进行传输，从而不会发生数据帧的丢失。 数据帧队列管理还包括通过与链路列表管理方案一起采用广播帧计数器来管理广播帧的特殊技术。 先进先出的顺序与单播帧相结合地保持，而不需要用于广播帧的多个数据帧存储时隙，从而实现高通量的帧切换而不施加额外的存储器要求。

公开(公告)号：US07977951B1

公开(公告)日：2011-07-12

申请号：US12897292

申请日：2010-10-04

申请人： William Lo ,  Tak-Lap Tsui

发明人： William Lo ,  Tak-Lap Tsui

IPC分类号： G01R31/02

CPC分类号： H04L43/50

摘要： A first physical layer (PHY) device includes an auto-negotiation module, a first cable-length measuring module, and a first control module. The auto-negotiation module exchanges data rates of the first PHY device and a second PHY device. The first PHY device is connected to the second PHY device by a cable. The first cable-length measuring module performs a first measurement of a length of the cable. The first control module selectively receives a second measurement of the length of the cable from the second PHY device, and selects a data rate of the first PHY device from the data rates of the first PHY device and the second PHY device based on (i) the first measurement of the length of the cable performed by the first cable-length measuring module of the first PHY device, or (ii) the second measurement of the length of the cable received from the second PHY device.

摘要翻译： 第一物理层（PHY）设备包括自动协商模块，第一电缆长度测量模块和第一控制模块。 自动协商模块交换第一PHY设备和第二PHY设备的数据速率。 第一PHY设备通过电缆连接到第二PHY设备。 第一缆线长度测量模块进行电缆长度的第一次测量。 第一控制模块选择性地接收来自第二PHY设备的电缆长度的第二测量，并且基于（i）从第一PHY设备和第二PHY设备的数据速率来选择第一PHY设备的数据速率， 由第一PHY设备的第一电缆长度测量模块执行的电缆的长度的第一测量，或（ii）从第二PHY设备接收的电缆的长度的第二测量。

公开(公告)号：US06490279B1

公开(公告)日：2002-12-03

申请号：US09121586

申请日：1998-07-23

申请人： Honglu Chen ,  Ying Wang ,  Tak-Lap Tsui

发明人： Honglu Chen ,  Ying Wang ,  Tak-Lap Tsui

IPC分类号： H04L1256

CPC分类号： H04L12/56

摘要： This invention discloses an improved address table apparatus that includes an address bus for receiving input data packets and for hashing a designated bucket number and extracting a key from each of the data packets. The address table apparatus further includes a plurality of memory banks connected to the address bus wherein each memory bank includes a plurality of memory buckets for storing a designation address (DA) and a port number in each of the buckets. The address table apparatus further includes a comparand bus connected to the address bus for receiving the key therefrom. The address table apparatus further includes a plurality of comparators each corresponding to one of the memory banks for receiving the designation address (DA) and the port number from the designated bucket from a corresponding memory bank. The comparators further connected to the comparand bus for receiving and comparing the key to the address from the designated bucket in each of the memory banks. The address table apparatus further includes a result bus connected to the comparators for displaying an output port number from one of the comparators if the key extracted from one the data packets matching the designation address (DA) from one of the designated buckets.

摘要翻译： 本发明公开了一种改进的地址表装置，其包括用于接收输入数据分组的地址总线，并且用于散列指定的存储桶号并从每个数据分组提取密钥。 地址表装置还包括连接到地址总线的多个存储器组，其中每个存储体包括用于存储每个存储桶中的指定地址（DA）和端口号的多个存储器桶。 地址表装置还包括连接到地址总线的比较总线，用于从其接收密钥。 地址表装置还包括多个比较器，每个比较器对应于一个存储器组，用于从相应的存储体接收指定地址（DA）和来自指定存储器的端口号。 比较器还连接到比较总线，用于接收和比较每个存储体中的来自指定桶的地址的密钥。 地址表装置还包括连接到比较器的结果总线，用于从一个比较器显示输出端口号，如果从一个指定的桶中的一个指定的桶中的一个与指定地址（DA）匹配的数据分组提取的密钥。

公开(公告)号：US08670335B2

公开(公告)日：2014-03-11

申请号：US12415705

申请日：2009-03-31

申请人： Ozdal Barkan ,  Tak-Lap Tsui

发明人： Ozdal Barkan ,  Tak-Lap Tsui

IPC分类号： H04L12/28 ,  H04L12/26 ,  G06F15/16 ,  G06F1/00 ,  G01R31/11 ,  H03L5/02

CPC分类号： H04L5/1438 ,  H04L12/12 ,  H04L25/0288

摘要： Reduced power transmission is described. In embodiments, networked devices communicate via a network connection. A characteristic of the network connection between the networked devices can be determined, and an output amplitude of a signal that is indicative of the communications between the network devices can be adjusted based on the characteristic of the network connection. Power consumption that is utilized for the communications between the network devices is reduced based on the adjustment of the output amplitude of the signal.

摘要翻译： 描述了减少功率传输。 在实施例中，网络设备经由网络连接进行通信。 可以确定网络设备之间的网络连接的特性，并且可以基于网络连接的特性来调整指示网络设备之间的通信的信号的输出幅度。 用于网络设备之间的通信的功耗基于信号的输出幅度的调整而减少。

公开(公告)号：US20090252054A1

公开(公告)日：2009-10-08

申请号：US12415705

申请日：2009-03-31

申请人： Ozdal Barkan ,  Tak-Lap Tsui

发明人： Ozdal Barkan ,  Tak-Lap Tsui

IPC分类号： H04L12/26 ,  G06F1/32

CPC分类号： H04L5/1438 ,  H04L12/12 ,  H04L25/0288

摘要： Reduced power transmission is described. In embodiments, networked devices communicate via a network connection. A characteristic of the network connection between the networked devices can be determined, and an output amplitude of a signal that is indicative of the communications between the network devices can be adjusted based on the characteristic of the network connection. Power consumption that is utilized for the communications between the network devices is reduced based on the adjustment of the output amplitude of the signal.

摘要翻译： 描述了减少功率传输。 在实施例中，网络设备经由网络连接进行通信。 可以确定网络设备之间的网络连接的特性，并且可以基于网络连接的特性来调整指示网络设备之间的通信的信号的输出幅度。 用于网络设备之间的通信的功耗基于信号的输出幅度的调整而减少。

公开(公告)号：US08588705B1

公开(公告)日：2013-11-19

申请号：US12323292

申请日：2008-11-25

申请人： Tak-Lap Tsui ,  Runsheng He ,  Ozdal Barkan ,  Dance Wu

发明人： Tak-Lap Tsui ,  Runsheng He ,  Ozdal Barkan ,  Dance Wu

IPC分类号： H04W52/24

CPC分类号： H04B3/237 ,  H04B3/493 ,  H04B5/0037 ,  H04W52/24

摘要： A system and method of determining an unbalanced current condition in Power over Ethernet applications are disclosed. In some implementations, a user or network administrator may be notified of potential impairments due to unbalanced current.

摘要翻译： 公开了一种在以太网供电中确定不平衡电流状况的系统和方法。 在一些实现中，可能会向用户或网络管理员通知由于不平衡电流引起的潜在损害。

公开(公告)号：US08513952B2

公开(公告)日：2013-08-20

申请号：US12330751

申请日：2008-12-09

申请人： Ozdal Barkan ,  William Lo ,  Tak-Lap Tsui

发明人： Ozdal Barkan ,  William Lo ,  Tak-Lap Tsui

IPC分类号： G01R31/00

CPC分类号： G01R31/28 ,  G01R31/021 ,  H04L43/50

摘要： Aspects of the present disclosure provide for a cable tester that tests a cable to determine the cable length. The cable tester can include a clock generator that generates a clock that has clock period that is a multiple of the data symbol period and a signal generator that injects the training signal, which can be synchronous with the clock, into the cable. The cable tester can also include a receiver that samples the returned signal from the cable and adaptively filters the returned signal based on the training signal and a controller that determines the cable length from the adaptive filter tap coefficients.

摘要翻译： 本公开的方面提供了测试电缆以确定电缆长度的电缆测试器。 电缆测试器可以包括时钟发生器，其产生具有数据符号周期的倍数的时钟周期的时钟和将时钟同步的训练信号注入到电缆中的信号发生器。 电缆测试器还可以包括接收器，其对来自电缆的返回信号进行采样，并且基于训练信号自适应地过滤返回的信号，以及控制器，其根据自适应滤波器抽头系数确定电缆长度。

公开(公告)号：US07808249B1

公开(公告)日：2010-10-05

申请号：US12035816

申请日：2008-02-22

申请人： William Lo ,  Tak-Lap Tsui

发明人： William Lo ,  Tak-Lap Tsui

IPC分类号： G01R31/11

CPC分类号： H04L43/50

摘要： A physical layer (PHY) device of a network device includes a first module, a first cable-length measuring (CLM) module, and a first control module. The first module determines whether a remote PHY that communicates with the PHY device over a cable is capable of measuring a length of the cable. The first CLM module measures a first length of the cable. The first control module causes the first length to be transmitted to the remote PHY, receives a second length of the cable measured by the remote PHY, and adjusts an operating parameter of the PHY based on at least one of the first and second lengths.

摘要翻译： 网络设备的物理层（PHY）设备包括第一模块，第一电缆长度测量（CLM）模块和第一控制模块。 第一模块确定通过电缆与PHY设备通信的远程PHY是否能够测量电缆的长度。 第一个CLM模块测量电缆的第一个长度。 第一控制模块使得第一长度被发送到远程PHY，接收由远程PHY测量的电缆的第二长度，并且基于第一和第二长度中的至少一个来调整PHY的操作参数。