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    • 1. 发明授权
    • STM-1 to STM-64 SDH/SONET framer with data multiplexing from a series of configurable I/O ports
    • STM-1至STM-64 SDH / SONET成帧器,具有来自一系列可配置I / O端口的数据复用功能
    • US07161961B2
    • 2007-01-09
    • US09880450
    • 2001-06-13
    • Kenneth James BarkerRolf ClaubergJean Louis CalvignacAndreas Guenther HerkersdorfFabrice Jean VerplankenDavid John Webb
    • Kenneth James BarkerRolf ClaubergJean Louis CalvignacAndreas Guenther HerkersdorfFabrice Jean VerplankenDavid John Webb
    • H04J3/00H04J3/02H04L12/56
    • H04J3/1611H04J3/0685H04J3/22H04J2203/0089
    • The present invention relates to a device for combining at least two data signals having an input data rate into a single data stream having an output data rate being higher than the input data rate for transmission on a shared medium or vice versa, particularly, to a single SDH/SONET framer capable of handling a large range of SDH/SONET frames from STM-i to STM-j with an aggregated total capacity corresponding to an STM-j frame where i and j are integers in the range from 1 to 64 or higher according to the STM-N definition of the SDH/SONET standards. More over, the present invention can also be extended to work with STS-1 as lowest range. STS-1 exists in SONET only not SDH and corresponds to a data rate of 51.5 Mb/s a third of the 156 Mb/s of STM-1. The device according to the present invention comprises at least two ports for receiving and/or sending said at least two data signals, a port scanning unit for extracting data from the data signals received by said ports and/or synthesizing data to be transmitted via the ports, respectively, whereby said port scanning unit is configured to extract data from ports providing data streams having at least two different input data rates and/or to synthesize data to be transmitted via the ports taking data streams having at least two different data rates.
    • 本发明涉及一种用于将具有输入数据速率的至少两个数据信号组合成具有高于用于在共享介质上传输的输入数据速率的输出数据速率的单个数据流的装置,反之亦然,特别涉及一种 单个SDH / SONET成帧器能够处理从STM-i到STM-j的大范围的SDH / SONET帧,具有对应于STM-j帧的聚合总容量,其中i和j是从1到64的整数或 根据SDH / SONET标准的STM-N定义更高。 此外,本发明也可以扩展到使用STS-1作为最低范围。 STS-1仅存在于SONET中,不存在SDH,对应于156Mb / s的STM-1的1/3的数据速率为51.5Mb / s。 根据本发明的装置包括用于接收和/或发送所述至少两个数据信号的至少两个端口,用于从由所述端口接收的数据信号中提取数据和/或合成要通过所述端口发送的数据的端口扫描单元 其中所述端口扫描单元被配置为从提供具有至少两个不同输入数据速率的数据流的端口提取数据和/或合成要通过端口发送的数据,该数据流具有至少两个不同数据速率的数据流。
    • 3. 发明授权
    • Architecture for a multi-port adapter with a single media access control (MAC)
    • 具有单媒体访问控制(MAC)的多端口适配器的体系结构
    • US06373848B1
    • 2002-04-16
    • US09123899
    • 1998-07-28
    • Samuel Steven AllisonKenneth James Barker
    • Samuel Steven AllisonKenneth James Barker
    • H04L1256
    • H04Q11/0471H04L29/06H04L69/32H04L69/324H04Q2213/13103H04Q2213/13106H04Q2213/13141H04Q2213/13174H04Q2213/13202H04Q2213/13209H04Q2213/13214H04Q2213/13215H04Q2213/13216H04Q2213/1329H04Q2213/13299H04Q2213/1332H04Q2213/13322H04Q2213/13389
    • A multi-port adapter having a single MAC chip has reduced logic circuits for transferring data between a host system and a TDM communication system. The MAC chip includes a transmit MAC and a receive MAC, each coupled at one end to a port multiplexer through an interface and at the other end to respective storage registers. The port multiplexer is coupled to the Physical Layer of each port. Transmit and receive state registers track the state of each port in the transfer of data in the transmit and receive directions. The storage registers are coupled through a host bus interface to a host bus and to the host system. Control logic is coupled to the storage register to control the transfer of data between the system and the storage registers. A port selector coupled between the multiplexer and the transmit and receive state registers selects ports for transfer of data in succession. On each chip clock cycle, the port selector selects a state machine register to determine the state of the MACs for processing the data and a section of the FIFO's to write or read data for the selected port. At the end of the cycle, the state registers are set and stay set until selected again. The process repeats for each port in a cyclic manner. Once data is accumulated in the receive storage register, control logic reads the data of the host bus. Once space is available in the transmit storage register, the control logic writes data from the host system to the transmit storage register.
    • 具有单个MAC芯片的多端口适配器具有用于在主机系统和TDM通信系统之间传送数据的减少的逻辑电路。 MAC芯片包括发送MAC和接收MAC,每个MAC在一端通过接口耦合到端口多路复用器,另一端通过相应的存储寄存器耦合。 端口复用器耦合到每个端口的物理层。 发送和接收状态寄存器跟踪发送和接收方向中数据传输中每个端口的状态。 存储寄存器通过主机总线接口耦合到主机总线和主机系统。 控制逻辑耦合到存储寄存器以控制系统和存储寄存器之间的数据传输。 耦合在多路复用器和发送和接收状态寄存器之间的端口选择器选择用于连续传输数据的端口。 在每个芯片时钟周期中,端口选择器选择一个状态机寄存器来确定用于处理数据的MAC的状态以及FIFO的一部分来写入或读取所选端口的数据。 在循环结束时,状态寄存器被设置并保持置位,直到再次选择。 该过程以循环方式重复每个端口。 一旦数据在接收存储寄存器中累积,控制逻辑读取主机总线的数据。 一旦发送存储寄存器中有空间,控制逻辑将数据从主机系统写入发送存储寄存器。
    • 4. 发明授权
    • Method and system for fast ethernet serial port multiplexing to reduce I/O pin count
    • 用于快速以太网串口复用的方法和系统,以减少I / O引脚数
    • US06980563B2
    • 2005-12-27
    • US09834591
    • 2001-04-13
    • Kenneth James BarkerCharles Reeves Hoffman
    • Kenneth James BarkerCharles Reeves Hoffman
    • H04L12/56H04J3/16
    • H04L49/351
    • A system and method of reducing the input and output pins used to interface a fast serial port Ethernet processing system using multiplexing. Using the system of the present invention, four pins can allow a plurality of Ethernet communication paths to be connected to a single processor on a substrate. These four connections include a clocking input as well as a strobe signal which coordinates the multiplexing and identifies the time period for a predetermined source. The physical layer and the processor are each provided with a multiplexor which is controlled by the strobe to select the network to be coupled at any given time. The multiplexor includes a counter which is incremented by the clocking input and reset by the strobe signal.
    • 一种减少输入和输出引脚的系统和方法,用于使用多路复用来连接快速串行端口以太网处理系统。 使用本发明的系统,四个引脚可以允许多个以太网通信路径连接到基板上的单个处理器。 这四个连接包括一个时钟输入以及一个选通信号,该信号协调多路复用并识别一个预定的源的时间段。 物理层和处理器均设置有多路复用器,该复用器由选通器控制,以选择要在任何给定时间耦合的网络。 多路复用器包括一个由时钟输入递增并由选通信号复位的计数器。
    • 7. 发明授权
    • System and method for avoiding host transmit underruns in a
communication network
    • 在通信网络中避免主机发送欠载的系统和方法
    • US6167032A
    • 2000-12-26
    • US966278
    • 1997-11-07
    • Samuel Steven AllisonKenneth James BarkerSteven Howard JohnsonJoseph Kinman Lee
    • Samuel Steven AllisonKenneth James BarkerSteven Howard JohnsonJoseph Kinman Lee
    • H04L12/56H04L29/10H04J3/14H04L12/28
    • H04L49/9031H04L29/10H04L47/10H04L47/13H04L47/29H04L49/90
    • A system and method to avoid transmit underruns from a host system to a communication network using an adjustable threshold on a frame basis. The host system includes a device driver, host descriptors and host buffer. The host descriptor define the number of blocks of data to be transferred from the host to the network via a Media Access Control (MAC) device. The MAC device includes a processor, a transmit storage device, and a medium independent interface coupled to the network. The MAC device is connected to the host system via a data bus. A host descriptor is generated for each frame of data transferred by the MAC device from the host to the network. The descriptor is generated by the device driver and provides the MAC processor with a block size of data to be transferred and a threshold in each frame indicating the number of blocks of data to be transferred from the host system to the MAC device to avoid an underrun before transmission to the communication network. The MAC processor generates and transmits a "retry" bit to the device driver when a transmit underrun occurs. The device driver modifies the threshold in subsequent frames to avoid transmit underruns by raising or lowering the thresholds according to the number of retries.
    • 一种系统和方法,用于在帧基础上使用可调阈值避免从主机系统向通信网络发送欠载。 主机系统包括设备驱动程序,主机描述符和主机缓冲区。 主机描述符定义要通过媒体访问控制(MAC)设备从主机传输到网络的数据块的数量。 MAC设备包括处理器,发送存储设备和耦合到网络的中等独立接口。 MAC设备通过数据总线连接到主机系统。 为由MAC设备从主机传输到网络的每个数据帧生成主机描述符。 描述符由设备驱动程序生成,并为MAC处理器提供要传输的数据的块大小和每帧中的阈值,指示要从主机系统传送到MAC设备的数据块的数量,以避免欠载 在传输到通信网络之前。 当发生发生欠载时,MAC处理器产生并发送“重试”位到设备驱动器。 设备驱动程序通过根据重试次数提高或降低阈值来修改后续帧中的阈值,以避免传输欠载。