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1.发明授权Automatic polarity detection and correction method and apparatus employing linkpulses 失效采用连续脉冲的自动极性检测和校正方法及装置
公开(公告)号：US5257287A
公开(公告)日：1993-10-26
申请号：US620980
申请日：1990-11-30
IPC分类号： H03M7/00 , H03K5/02 , H03K5/13 , H03K5/1534 , H03K5/156 , H03K19/0185 , H03M5/12 , H04L25/02 , H04L25/08 , H04L25/49 , H04L25/34
CPC分类号： H03K5/023 , H03K19/018578 , H03K5/13 , H03K5/1534 , H03K5/156 , H04L25/02 , H04L25/0272 , H04L25/0292 , H04L25/08 , H04L25/085 , H04L25/4904
摘要： A differential receiver incorporated into a MAU which receives both Manchester packets and linkpulses according to the IEEE 802.3 10Base-T standard has polarity detection and correction circuit for automatically detecting a reversed polarity for RD input lines. The differential receiver samples incoming pulses for time, amplitude and pulse width qualification and makes a preliminary polarity determination based upon polarity of such qualified pulses. This preliminary polarity allows a linktest state machine to transition to a link.sub.-- pass state, enabling output drivers of the MAU. Additionally, the linkpulse polarity information initially makes a polarity determination for the entire differential receiver which asserts a FIX POLARITY signal. The FIX POLARITY signal controls a correction circuit which internally remedies reversed input lines. Preferably, the correction circuit internally reroutes the signals. An ETD polarity circuit makes polarity determinations from any ETD information received, as effected by the correction circuit. The ETD polarity circuit independently controls the linkpulse polarity determinations and conflicting determinations are resolved in favor of the ETD polarity circuit. Upon detecting two consecutive, consistent valid ETDs, the ETD polarity circuit locks-in the polarity determinations until a reset or a linkfail condition. The correction circuit effects both Manchester packets and linkpulses, so an incorrectly locked polarity will produce inverted linkpulses which will not allow the MAU to remain in the link.sub.-- pass state. In the linkfail state, the MAU may reestablish the correct polarity.
摘要翻译： 根据IEEE 802.3 10Base-T标准，并入到接收曼彻斯特分组和链路脉冲的MAU中的差分接收机具有用于自动检测RD输入线的反极性的极性检测和校正电路。 差分接收器对输入脉冲进行时间，幅度和脉冲宽度鉴定，并根据这种合格脉冲的极性进行初步极性判定。 该初步极性允许链路测试状态机转换到链路通过状态，使得MAU的输出驱动器成为可能。 此外，链路脉冲极性信息最初对整个差分接收机进行极性确定，这个确定了FIX POLARITY信号。 FIX POLARITY信号控制一个校正电路，内部补救反向输入线路。 优选地，校正电路在内部重新路由信号。 ETD极性电路根据校正电路实现的任何接收的ETD信息进行极性判定。 ETD极性电路独立控制链路脉冲极性判定，冲突确定有利于ETD极性电路。 在检测到两个连续的，一致的有效ETD时，ETD极性电路锁定极性确定，直到复位或链接状态。 校正电路影响曼彻斯特数据包和链路脉冲，因此锁定不正确的极性将产生反向的链路脉冲，这将不允许MAU保持链路通过状态。 在链接状态下，MAU可能会重新建立正确的极性。
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公开(公告)号：US5467369A
公开(公告)日：1995-11-14
申请号：US224946
申请日：1994-04-08
IPC分类号： G06F13/00 , H03K5/02 , H03K5/156 , H03K19/0185 , H04L25/02 , H04L25/08 , H04L25/49 , H04B3/46 , H04B17/00
CPC分类号： H04L25/028 , H03K19/018578 , H03K5/023 , H03K5/156 , H04L25/0272 , H04L25/08 , H04L25/085 , H04L25/4904 , H04L25/0292
摘要： An integrated media attachment unit (MAU) operative for interfacing Digital Terminal Equipment (DTE) on a Local Area Network (LAN) using twisted pair media. The twisted pair function as either a DTE MAU or a repeater MAU. A line driver for the twisted pair differential signal provides a ramped response with low jitter while an improved Attachment Unit Interface (AUI) driver uses CMOS technology and provides simplified End-of-Transmission Delimiter (ETD) control. The twisted pair MAU includes a combined override and status indication of link status and an additional feature to allow automatic polarity reversal of differential signal input lines and polarity status signalling.
摘要翻译： 用于使用双绞线介质在局域网（LAN）上连接数字终端设备（DTE）的集成媒体附件单元（MAU）。 双绞线用作DTE MAU或中继器MAU。 双绞线差分信号的线路驱动器提供具有低抖动的斜坡响应，而改进的附件单元接口（AUI）驱动器使用CMOS技术并提供简化的终止传输定界符（ETD）控制。 双绞线MAU包括链路状态的组合覆盖和状态指示以及允许差分信号输入线自动极性反转和极性状态信号的附加功能。
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公开(公告)号：US5327465A
公开(公告)日：1994-07-05
申请号：US899083
申请日：1992-06-15
IPC分类号： G06F13/00 , H03K5/02 , H03K5/156 , H03K19/0185 , H04L25/02 , H04L25/08 , H04L25/49 , H04B1/10
CPC分类号： H04L25/028 , H03K19/018578 , H03K5/023 , H03K5/156 , H04L25/0272 , H04L25/08 , H04L25/085 , H04L25/4904 , H04L25/0292
摘要： An integrated media attachment unit (MAU) operative for interfacing Digital Terminal Equipment (DTE) on a Local Area Network (LAN) using twisted pair media. The twisted pair function as either a DTE MAU or a repeater MAU. A line driver for the twisted pair differential signal provides a ramped response with low jitter while an improved Attachment Unit Interface (AUI) driver uses CMOS technology and provides simplified End-of-Transmission Delimiter (ETD) control. The twisted pair MAU includes a combined override and status indication of link status and an additional feature to allow automatic polarity reversal of differential signal input lines and polarity status signalling.
摘要翻译： 用于使用双绞线介质在局域网（LAN）上连接数字终端设备（DTE）的集成媒体附件单元（MAU）。 双绞线用作DTE MAU或中继器MAU。 双绞线差分信号的线路驱动器提供具有低抖动的斜坡响应，而改进的附件单元接口（AUI）驱动器使用CMOS技术并提供简化的终止传输定界符（ETD）控制。 双绞线MAU包括链路状态的组合覆盖和状态指示以及允许差分信号输入线自动极性反转和极性状态信号的附加功能。
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公开(公告)号：US5164960A
公开(公告)日：1992-11-17
申请号：US480426
申请日：1990-02-15
CPC分类号： H04L25/028 , H03K19/018578 , H03K5/023 , H03K5/156 , H04L25/0272 , H04L25/08 , H04L25/085 , H04L25/4904 , H04L25/0292
摘要： An integrated media attachment unit (MAU) operative for interfacing Digital Terminal Equipment (DTE) on a Local Area Network (LAN) using twisted pair media. The twisted pair function as either a DTE MAU or a repeater MAU. A line driver for the twisted pair differential signal provides a ramped response with low jitter while an improved Attachment Unit Interface (AUI) driver uses CMOS technology and provides simplified End-of-Transmission Delimiter (EDT) control. The twisted pair MAU includes a combined override and status indication of link status and an additional feature to allow automatic polarity reversal of differential signal input lines and polarity status signalling.
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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：US5414694A
公开(公告)日：1995-05-09
申请号：US19926
申请日：1993-02-19
申请人： Ian S. Crayford , William Lo , Nader Vijeh
发明人： Ian S. Crayford , William Lo , Nader Vijeh
CPC分类号： H04L12/4625 , 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 在网络拓扑中。 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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7.发明授权公开(公告)号：US07061861B1
公开(公告)日：2006-06-13
申请号：US09611180
申请日：2000-07-06
申请人： Adisak Mekkittikul , Nader Vijeh
发明人： Adisak Mekkittikul , Nader Vijeh
CPC分类号： H04L47/32 , H04L12/2852 , H04L12/433 , H04L47/10 , H04L47/11 , H04L47/225 , H04L47/2433 , H04L47/2441 , H04L47/266
摘要： A method and system for implementing weighted fair flow control on a metropolitan area network. Weighted fair flow control is implemented using a plurality of metro packet switches (MPS), each including a respective plurality of virtual queues and a respective plurality of per flow queues. Each MPS accepts data from a respective plurality of local input flows. Each local input flow has a respective quality of service (QoS) associated therewith. The data of the local input flows are queued using the per flow queues, with each input flow having its respective per flow queue. Each virtual queue maintains a track of the flow rate of its respective local input flow. Data is transmitted from the local input flows of each MPS across a communications channel of the network and the bandwidth of the communications channel is allocated in accordance with the QoS of each local input flow. The QoS is used to determine the rate of transmission of the local input flow from the per flow queue to the communications channel. This implements an efficient weighted bandwidth utilization of the communications channel. Among the plurality of MPS, bandwidth of the communications channel is allocated by throttling the rate at which data is transmitted from an upstream MPS with respect to the rate at which data is transmitted from a downstream MPS, thereby implementing a weighted fair bandwidth utilization of the communications channel.
摘要翻译： 一种在城域网实现加权公平流控制的方法和系统。 使用多个城域分组交换机（MPS）来实现加权的公平流控制，每个城域分组交换机包括相应的多个虚拟队列和相应的多个每个流队列。 每个MPS接收来自相应的多个本地输入流的数据。 每个本地输入流具有与其相关联的相应的服务质量（QoS）。 本地输入流的数据使用每个流队列进行排队，每个输入流具有各自的每个流队列。 每个虚拟队列保持其各自本地输入流的流量的轨迹。 数据通过网络的通信信道从每个MPS的本地输入流发送，并且根据每个本地输入流的QoS来分配通信信道的带宽。 QoS用于确定从每个流队列到通信信道的本地输入流的传输速率。 这实现了通信信道的有效加权带宽利用。 在多个MPS中，通过相对于从下游MPS发送数据的速率来调节从上游MPS发送数据的速率来分配通信信道的带宽，由此实现 通讯渠道。
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8.发明授权公开(公告)号：US06947998B2
公开(公告)日：2005-09-20
申请号：US10094035
申请日：2002-03-07
IPC分类号： H04L12/28 , H04L12/42 , H04L12/56 , G06F15/173
CPC分类号： H04L47/6215 , H04L12/2852 , H04L12/42 , H04L47/2433 , H04L47/2441 , H04L47/30 , H04L47/50 , H04L47/522 , H04L47/562 , H04L47/6255
摘要： In a metropolitan area network, a method and system for maintaining an accurate total of the amount of allocated bandwidth on the network. A plurality of incoming packets are assigned to a respective plurality of queues of a metropolitan area network switch. Using a fair arbitration scheme, the respective queues are configured to empty at a specified output rate. A finish time for each respective queue is computed, the finish time describing a time at which the respective queue will be emptied using the output rate. The plurality of queues are grouped into multiple groups in accordance with their respective finish times. The earliest group includes the reserved rates of those queues having a finish time indicating an empty condition at a first time increment. The second earliest group includes the reserved rates of those queues having a finish time indicating an empty condition at a second time increment later than the first time increment, and so on. The amount of allocated bandwidth on the network is determined by tracking the sum of the reserved rates of all the multiple groups. The first time increment, second time increment, and the like are indexed with respect to a schedule clock. The earliest group thus indicates those queues that will have an empty condition at a next time increment of the schedule clock. The determination of the amount of allocated bandwidth can be accomplished in real time, thereby allowing the efficient allocation of unallocated bandwidth in real time.
摘要翻译： 在城域网中，用于维持网络上分配的带宽量的准确总和的方法和系统。 多个输入分组被分配给城域网交换机的相应多个队列。 使用公平的仲裁方案，相应的队列被配置为以指定的输出速率清空。 计算每个相应队列的完成时间，完成时间描述使用输出速率排除相应队列的时间。 根据各自的完成时间，将多个队列分组成多组。 最早的组包括具有在第一时间增量处指示空条件的完成时间的那些队列的预留费率。 第二最早组包括在比第一时间增量晚的第二时间增量处具有指示空条件的完成时间的那些队列的保留速率，等等。 通过跟踪所有多个组的保留速率的总和来确定网络上分配的带宽量。 相对于调度时钟来索引第一次增量，第二次增量等。 因此，最早的组因此表示在调度时钟的下一次增量时将具有空条件的队列。 可以实时地实现分配带宽量的确定，从而实现对未分配带宽的有效分配。
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公开(公告)号：US5388133A
公开(公告)日：1995-02-07
申请号：US20490
申请日：1993-02-22
申请人： Nader Vijeh , William Lo
发明人： Nader Vijeh , William Lo
CPC分类号： H04L12/2602 , G06F11/348 , H04L43/00 , G06F2201/88
摘要： A counter for attribute stored in an Ethernet system is partitioned such that the storage section is separated from the incrementors section. In so doing, counters are implemented in a significantly less space than if the counters were implemented as individual counters. The counter utilizes random access memory as the storage section and a 32 bit incrementor. As the incrementor section along with a pair of latches to implement the counter.
摘要翻译： 存储在以太网系统中的属性的计数器被分区，使得存储部分与增量部分分离。 在这样做时，计数器的实现方式远远小于将计数器作为单独计数器实现的空间。 该计数器利用随机存取存储器作为存储部分和32位增量器。 作为递增器部分以及用于实现计数器的一对闩锁。
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公开(公告)号：US07792023B2
公开(公告)日：2010-09-07
申请号：US10846297
申请日：2004-05-13
申请人： Nader Vijeh , Adisak Mekkittikul
发明人： Nader Vijeh , Adisak Mekkittikul
CPC分类号： H04L47/10 , H04L12/433 , H04L47/11 , H04L47/20 , H04L47/2441 , H04L47/762 , H04L2012/5605 , H04L2012/5612 , H04L2012/5651
摘要： An asynchronous metropolitan packet transport ring having per-flow QoS. Asynchronous packetized data flow in one direction through a fiber optic loop. A number of Metropolitan Packet Switches (MPS) are coupled to the fiber optic loop. An MPS allows packetized data from an upstream MPS to flow to a downstream MPS over a segment of the fiber optic loop. The MPS also puts packetized data onto and pulls packetized data off of the fiber optic loop. Thereby, flows can access the fiber optic loop via the MPS's. The MPS's also regulate the data rates on a per-flow basis according to setup information supplied by a Ring Management System (RMS). If one segment of the fiber loop becomes overly congested, the MPS guarantees quality of service for those flows by deallocating available bandwidth from flows upstream to the point of congestion. Utilization of packet transport ring capacity is optimized by allocating any bandwidth that becomes available to active flows according to a pre-specified weighting scheme.
摘要翻译： 具有每流QoS的异步城域分组传输环。 异步打包数据通过光纤回路在一个方向流动。 一些大都市分组交换机（MPS）耦合到光纤回路。 MPS允许来自上游MPS的分组数据在光纤环路的一段上流向下游MPS。 MPS还将分组化数据放在光纤环路之外并将数据包化数据从光纤回路拉出。 因此，流可以通过MPS访问光纤环路。 MPS还根据环路管理系统（RMS）提供的设置信息，以每个流量为基础调整数据速率。 如果光纤环路的一个部分过载，则MPS通过从上游到拥塞点的流量中释放可用带宽来保证这些流的服务质量。 通过根据预先规定的加权方案分配可用于活动流的任何带宽来优化分组传输环容量的利用。
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