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1.发明授权Method and apparatus for nodes in network to avoid shrinkage of an interframe gap 失效网络节点的方法和装置，以避免帧间间隔的收缩
公开(公告)号：US4878219A
公开(公告)日：1989-10-31
申请号：US187208
申请日：1988-04-28
CPC分类号： H04L25/05 , H04J3/0632 , G06F2205/102
摘要： An output controller in a repeater node for controlling data transfers in a data communication system in which each node is operated by an independent local clock. Nodes will occasionally delete idle bytes from a preamble to recenter an elasticity buffer. The output controller performs a process that requires the elasticity buffer to be progressively more full before deleting another idle byte from the preamble. Transmission of the start of a subsequent frame is delayed and additional idle bytes are transmitted when the number of idle bytes being transmitted is at or below a certain threshold. Multiple thresholds are utilized so that the amount of the delay can be adjusted.
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公开(公告)号：US5291491A
公开(公告)日：1994-03-01
申请号：US643971
申请日：1991-01-22
申请人： Jerry D. Hutchison , Henry S. Yang
发明人： Jerry D. Hutchison , Henry S. Yang
IPC分类号： H04L12/433 , H04L12/46 , H04L12/42
CPC分类号： H04L12/4625 , H04L12/433
摘要： RingOp/Claim oscillations due to duplicate addresses and transmit aborts are avoided by using token preserver frames to reset the TVX timer in a station. A communications network having a plurality of stations capable of transmitting frames onto the network, and the stations capable of detecting transmission on the network, and the stations capable of taking predetermined action in the absence of detecting the transmission for a predetermined first time interval, and a first timer for measuring the predetermined first time interval. Measuring a second predetermined time interval, the second predetermined time interval being chosen to be less than the first predetermined time interval; transmitting a reset frame onto the network by a selected station at time intervals substantially equal to the second predetermined time interval, and the reset frames being capable of causing a station to reset the first timer to a beginning value. The network may be a token controlled ring. The reset frame may be a token preserver frame.
摘要翻译： RingOp /通过使用令牌保留帧来重置站中的TVX定时器来避免由于重复的地址和发送中止引起的振荡。 一种通信网络，具有能够将帧发送到网络上的多个站，以及能够检测网络上的传输的站，以及能够在没有以预定的第一时间间隔检测到传输的情况下采取预定动作的站;以及 用于测量预定的第一时间间隔的第一定时器。 测量第二预定时间间隔，所述第二预定时间间隔被选择为小于所述第一预定时间间隔; 在基本上等于第二预定时间间隔的时间间隔内，通过所选择的站将复位帧发送到网络上，并且复位帧能够使站将第一定时器重置为起始值。 网络可以是令牌控制的环。 复位帧可以是令牌保留帧。
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公开(公告)号：US06687463B1
公开(公告)日：2004-02-03
申请号：US09591293
申请日：2000-06-09
IPC分类号： H04J1402
CPC分类号： H04J14/0283 , H04J14/0206 , H04J14/0209 , H04J14/0213 , H04J14/0219 , H04J14/0227 , H04J14/0246 , H04J14/025 , H04J14/0284 , H04J14/0293
摘要： A communication system includes plural nodes interconnected with an optical transmission medium capable of carrying plural bands of optical channels. A device at each node is coupled to the medium for dropping one or more bands, adding one or more bands, and passively transmitting other bands such that a pair of nodes can communicate directly using a band common to the respective bands. One band of the bands associated with each of a first set of nodes overlaps with one band of the bands associated with each of a second set of nodes. Multiple overlapping bands provide a high level of wavelength termination diversity. An optical management bus system and method connects plural hybrid optical/electrical cables between transmission equipment and optical modules which connect to network fibers to provide a set of electrical connections that can be used to determine optical interconnections in an optical shelf configuration. A particular optical module can be identified as the root of an optical branching tree at a node and thereby the unique termination point of a network fiber such that a physical fiber topology can be associated with the logical fiber topology.
摘要翻译： 通信系统包括与能够承载多个光通道的光传输介质互连的多个节点。 每个节点处的设备被耦合到介质，用于丢弃一个或多个频带，添加一个或多个频带，以及被动发送其他频带，使得一对节点可以使用各个频带共有的频带直接进行通信。 与第一组节点中的每一个相关联的频带的一个频带与与第二组节点中的每一个相关联的频带的一个频带重叠。 多个重叠频带提供高水平的波长终端分集。 光学管理总线系统和方法将连接到网络光纤的传输设备和光学模块之间的多个混合光/电缆连接，以提供可用于确定光学架构配置中的光互连的一组电连接。 特定光模块可以被识别为节点处的光分支树的根，从而将网络光纤的唯一终端点识别为使得物理光纤拓扑可以与逻辑光纤拓扑结合。
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4.发明授权Method and system for removal of low order optical transmission modes in multimode optical fiber computer network to improve modal bandwidth 失效在多模光纤计算机网络中去除低阶光传输模式的方法和系统，以改善模式带宽
公开(公告)号：US6154589A
公开(公告)日：2000-11-28
申请号：US82767
申请日：1998-05-21
IPC分类号： H04B10/2581 , G02B6/26
CPC分类号： H04B10/2581
摘要： A method for improving modal bandwidth in computer networks using multimode optical fiber and single mode sources is disclosed in which the optical signal from a center of the optical fiber is blocked from reaching detector. This is accomplished according to a number of different techniques including the use of opaque spots on the fiber media/fiber couplers or the use of dark-cored fiber couplers. These configurations prevent pulse splitting that occurs in single mode source/multimode fiber systems by preventing light from the multimode fiber's center from interfering with the detector. When this is achieved, the detector is insulated from the effects of any pulse splitting, supporting data rates of greater than one GBPS by increasing the modal bandwidth.
摘要翻译： 公开了一种用于改善使用多模光纤和单模源的计算机网络中的模式带宽的方法，其中来自光纤中心的光信号被阻挡到达检测器。 这是根据许多不同的技术实现的，包括在纤维介质/纤维耦合器上使用不透明点或使用暗芯光纤耦合器。 这些配置通过防止多模光纤中心的光干扰检测器，防止在单模源/多模光纤系统中发生的脉冲分裂。 当实现这一点时，检测器与任何脉冲分离的效果隔离，通过增加模态带宽支持大于1GBPS的数据速率。
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公开(公告)号：US06728486B1
公开(公告)日：2004-04-27
申请号：US09590950
申请日：2000-06-09
IPC分类号： H04J1402
CPC分类号： H04J14/0227 , H04J14/0206 , H04J14/0209 , H04J14/0213 , H04J14/0246 , H04J14/025 , H04J14/0283 , H04J14/0284 , H04J14/0293
摘要： A communication system includes plural nodes interconnected with an optical transmission medium capable of carrying plural bands of optical channels. A device at each node is coupled to the medium for dropping one or more bands, adding one or more bands, and passively transmitting other bands such that a pair of nodes can communicate directly using a band common to the respective bands. One band of the bands associated with each of a first set of nodes overlaps with one band of the bands associated with each of a second set of nodes. Multiple overlapping bands provide a high level of wavelength termination diversity. An optical management bus system and method connects plural hybrid optical/electrical cables between transmission equipment and optical modules which connect to network fibers to provide a set of electrical connections that can be used to determine optical interconnections in an optical shelf configuration. A particular optical module can be identified as the root of an optical branching tree at a node and thereby the unique termination point of a network fiber such that a physical fiber topology can be associated with the logical fiber topology.
摘要翻译： 通信系统包括与能够承载多个光通道的光传输介质互连的多个节点。 每个节点处的设备被耦合到介质，用于丢弃一个或多个频带，添加一个或多个频带，以及被动发送其他频带，使得一对节点可以使用各个频带共有的频带直接进行通信。 与第一组节点中的每一个相关联的频带的一个频带与与第二组节点中的每一个相关联的频带的一个频带重叠。 多个重叠频带提供高水平的波长终端分集。 光学管理总线系统和方法将连接到网络光纤的传输设备和光学模块之间的多个混合光/电缆连接，以提供可用于确定光学架构配置中的光互连的一组电连接。 特定光模块可以被识别为节点处的光分支树的根，从而将网络光纤的唯一终端点识别为使得物理光纤拓扑可以与逻辑光纤拓扑结合。
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6.发明授权Method and system for removal of low order optical transmission modes to improve modal bandwidth in a multimode optical fiber computer network 有权用于去除低阶光传输模式以改善多模光纤计算机网络中的模式带宽的方法和系统公开(公告)号：US06356680B1
公开(公告)日：2002-03-12
申请号：US09650622
申请日：2000-08-30
IPC分类号： G02B626
CPC分类号： H04B10/2581
摘要： A method of improving modal bandwidth in computer networks using multimode optical fiber and single mode sources is disclosed in which the optical signal from a center of the optical fiber is prevented from reaching the detector. This is accomplished according to a number of different techniques including the use of opaque spots on the fiber media/fiber couplers or the use of dark-cored fiber couplers. These configurations prevent pulse splitting that occurs in single mode source/multimode fiber systems by preventing light from the multimode fiber's center from interfering with the detector. When this is achieved, the detector is insulated from the effects of pulse splitting, supporting increased data rates by increasing the modal bandwidth.
摘要翻译： 公开了一种使用多模光纤和单模源改善计算机网络中的模式带宽的方法，其中防止来自光纤中心的光信号到达检测器。 这是根据许多不同的技术实现的，包括在纤维介质/纤维耦合器上使用不透明点或使用暗芯光纤耦合器。 这些配置通过防止多模光纤中心的光干扰检测器，防止在单模源/多模光纤系统中发生的脉冲分裂。 当实现这一点时，检测器与脉冲分离的效果绝缘，通过增加模态带宽支持增加的数据速率。
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公开(公告)号：US06046982A
公开(公告)日：2000-04-04
申请号：US819273
申请日：1997-03-18
CPC分类号： H04L49/103 , H04L12/5602 , H04L49/108 , H04L49/3081 , H04L49/503 , H04L2012/5672 , H04L2012/5679 , H04L49/30
摘要： The input bandwidth of a data transfer device is increased by altering the conventional memory arbitration method in which a data cell is stored and a data cell is forwarded during each data transfer cycle. The input data rate is monitored and when the input data rate exceeds the maximum average throughput of the memory, the outcome of the memory arbitration cycle is changed so that the memory arbitration cycle consists of two stores (memory write operations) instead of one store and one forward (memory read operation.) In effect, the input memory arbitration process steals cycles from the output memory arbitration process when the input load exceeds that of the maximum average memory throughput. In accordance with one embodiment, the input data rate is monitored by examining input port FIFO buffers for the presence of data cells waiting for storage. Based on the results of the FIFO monitoring and the outcome of the current port arbitration cycle, a decision is made on the following port arbitration cycle whether to change the normal memory arbitration pattern.
摘要翻译： 通过改变在每个数据传输周期期间存储数据单元并且数据单元被转发的常规存储器仲裁方法来增加数据传送设备的输入带宽。 监视输入数据速率，并且当输入数据速率超过存储器的最大平均吞吐量时，改变存储器仲裁周期的结果，使得存储器仲裁周期由两个存储（存储器写操作）而不是一个存储器组成， 一个正向（存储器读取操作）实际上，当输入负载超过最大平均存储器吞吐量时，输入存储器仲裁过程从输出存储器仲裁过程中窃取循环。 根据一个实施例，通过检查输入端口FIFO缓冲器来监视等待存储的数据单元的存在来监视输入数据速率。 基于FIFO监视的结果和当前端口仲裁周期的结果，对以下端口仲裁周期做出是否改变正常存储器仲裁模式的决定。
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公开(公告)号：US5327534A
公开(公告)日：1994-07-05
申请号：US559031
申请日：1990-07-30
申请人： Jerry D. Hutchison , Henry S. Yang
发明人： Jerry D. Hutchison , Henry S. Yang
IPC分类号： H04L12/24 , H04L12/433 , H04L29/12 , G06F12/00
CPC分类号： H04L29/12264 , H04L12/24 , H04L12/433 , H04L29/12801 , H04L29/12839 , H04L41/00 , H04L61/2046 , H04L61/6004 , H04L61/6022
摘要： A duplicate address condition in a computer network may be detected by a station of the type for attachment to a computer communications network, the network capable of maintaining communications among a plurality of stations, the station having means for receiving a frame, the frame having a source address field and a frame control field; means for maintaining an individual address of the station; means for maintaining a source address list of address, the source address list not containing the individual address; means for determining that a contents of the source address field in the frame matches at least one address in the source address list; means for determining that the frame control field of the frame has a predetermined contents; and, means, responsive to the source address of the frame matching at least one address in the source address list and the frame control field of the frame having the predetermined value, for setting an indicator that a duplicate address condition exists. The predetermined contents of the frame control field further comprises an indication that the frame is a predetermined type of control frame. The predetermined type of claim may be a beacon frame, a claim frame, or some other MAC protocol frame. The list of alias addresses may be stored in a content addressable memory. A cyclical redundancy check may be used for determining that bits from the source address field and bits from the frame control field are error free.
摘要翻译： 计算机网络中的重复地址条件可以由用于附接到计算机通信网络的类型的站来检测，该站能够维持多个站之间的通信，该站具有用于接收帧的装置，该帧具有一个 源地址字段和帧控制字段; 维护车站个人地址的手段; 用于维护地址列表的源地址列表，源地址列表不包含单个地址; 用于确定所述帧中的源地址字段的内容与所述源地址列表中的至少一个地址匹配的装置; 用于确定帧的帧控制字段具有预定内容的装置; 以及响应于与源地址列表中的至少一个地址匹配的帧的源地址和具有预定值的帧的帧控制字段的装置，用于设置存在重复地址条件的指示符。 帧控制字段的预定内容还包括该帧是预定类型的控制帧的指示。 预定类型的权利要求可以是信标帧，声明帧或一些其他MAC协议帧。 别名地址列表可以存储在内容可寻址存储器中。 可以使用循环冗余校验来确定来自源地址字段的位和来自帧控制字段的位是无错误的。
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9.发明授权Method and system for preventing low order optical transmission modes in multimode optical fiber computer network using annulus laser 失效使用环形激光器在多模光纤计算机网络中防止低阶光传输模式的方法和系统公开(公告)号：US06556329B1
公开(公告)日：2003-04-29
申请号：US09083062
申请日：1998-05-21
IPC分类号： H04B1004
CPC分类号： H01S5/18394 , G02B6/4203 , G02B6/4206 , H01S5/0286 , H01S5/18308 , H01S5/2063 , H01S2301/203
摘要： A method for improving modal bandwidth in computer networks using multimode optical fiber and laser sources is disclosed in which an annular beam is generate by the laser source, thus preventing center fiber transmission modes from reaching the detector. This prevents or lessens a pulse-splitting effect at the detector. The annular beam is generated preferably by configuring a vertical cavity surface emitting laser to have a center totally-reflecting block of 5-7 microns to generate a substantially dark-centered beam.
摘要翻译： 公开了一种使用多模光纤和激光源改进计算机网络中的模式带宽的方法，其中激光源产生环形光束，从而防止中心光纤传输模式到达检测器。 这可以防止或减少检测器处的脉冲分裂效应。 优选地通过将垂直空腔表面发射激光器配置成具有5-7微米的中心全反射块来产生基本上为深中心的光束来产生环形光束。
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10.发明授权Common interface for a network having different communication media employing a carrier sense multiple access with collision detection (CSMA/CD) protocol 失效具有使用具有冲突检测（CSMA / CD）协议的载波侦听多路访问的不同通信介质的网络的公共接口
公开(公告)号：US5838989A
公开(公告)日：1998-11-17
申请号：US560173
申请日：1995-11-17
IPC分类号： H04L12/413 , H04L12/44 , H04L29/06 , G06F13/00
CPC分类号： H04L12/40032 , H04L12/413 , H04L12/44 , H04L29/06 , H04L69/18
摘要： A switchable interface for conveniently coupling a network station of the CSMA/CD type to a network having any of a variety of communication media. The invention provides a single interface connector through which connection may be made directly to a twisted-pair medium, using the 10BASE-T protocol, or to a medium of a different type, through an AUI protocol and an appropriate media attachment unit. The interface connector has pin assignments chosen to minimize adverse effects of misconfiguring the station by connecting to a network having a protocol that is different from the one selected in the switchable interface. In one form of the invention, the switchable interface has the ability to determine the protocol being used by the network to which it is connected, and to switch the interface accordingly. Use of the common interface reduces station equipment cost and provides for increased user convenience, since only a single connector is needed to connect to a variety of media types.
摘要翻译： 一种可切换接口，用于将CSMA / CD类型的网络站方便地耦合到具有各种通信介质中的任何一种的网络。 本发明提供了一个单一接口连接器，通过AUI协议和适当的媒体连接单元，通过它可以使用10BASE-T协议或通过不同类型的介质将连接直接连接到双绞线介质。 接口连接器具有选择的引脚分配，以通过连接到具有不同于在可切换接口中选择的协议的网络的网络来最小化错误地配置站的不利影响。 在本发明的一种形式中，可切换接口具有确定被连接到的网络使用的协议的能力，并相应地切换接口。 使用通用接口可降低站设备成本，并提供增加的用户便利性，因为只需要一个连接器来连接各种介质类型。
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