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31. 发明授权

US5774658A Arrangement for accessing media in a network having universal multiple access nodes and carrier sense nodes 失效
标题翻译：用于在具有通用多址接入节点和载波侦听节点的网络中访问媒体的布置
公开(公告)号：US5774658A
公开(公告)日：1998-06-30
申请号：US713880
申请日：1996-09-17
申请人： Mohan Kalkunte , Jayant Kadambi , Jim Mangin
发明人： Mohan Kalkunte , Jayant Kadambi , Jim Mangin
IPC分类号： H04L12/413 , G06F3/00
CPC分类号： H04L12/413
摘要： A network includes a combination of carrier-sense stations and Universal Multiple Access (UMA) stations using a time slot multiple access protocol. The network is configured to include assigned time slots for the respective UMA stations and unassigned time slots reserved for the carrier-sense stations to access the shared network media. Each of the UMA stations is provided with a corresponding assigned time slot and the total number of time slots. Since the UMA stations access the media only during the assigned time slot, the carrier-sense stations can contend for access to the media after waiting a minimum interpacket gap (IPG) after sensing deassertion of the receive carrier on the media. The UMA stations may also be modified to attempt access of the media using Ethernet-compliant, carrier-sense multiple-access with collision detection (CSMA/CD) protocol when a current time slot corresponds to a mixed-use time slot.
摘要翻译：网络包括使用时隙多址协议的载波侦听站和通用多路访问（UMA）站的组合。网络被配置为包括用于相应UMA站的分配的时隙和为载波侦听站保留以访问共享网络媒体的未分配时隙。每个UMA站都设有相应的分配时隙和总时隙数。由于UMA站仅在分配的时隙期间才能访问媒体，所以在感测到在媒体上的接收载波的取消消息之后等待最小分组间隙（IPG）之后，载波侦听站可以争取接入媒体。当当前时隙对应于混合使用时隙时，也可以修改UMA站以尝试使用具有冲突检测（CSMA / CD）协议的以太网兼容载波侦听多路访问的媒体访问。

32. 发明授权

US6118761A Apparatus and method for generating rate control frames in a workgroup switch based on traffic contribution from a network switch port 失效
标题翻译：基于来自网络交换机端口的业务贡献，在工作组交换机中生成速率控制帧的装置和方法
公开(公告)号：US6118761A
公开(公告)日：2000-09-12
申请号：US992841
申请日：1997-12-18
申请人： Mohan V. Kalkunte , Jayant Kadambi
发明人： Mohan V. Kalkunte , Jayant Kadambi
IPC分类号： H04L12/26 , H04L12/56 , G01R31/08
CPC分类号： H04L47/10 , H04L12/2602 , H04L43/00 , H04L47/11 , H04L47/263 , H04L47/29 , H04L47/30 , H04L43/0894 , H04L43/16 , H04L49/3018 , H04L49/3027 , H04L49/351 , H04L49/354 , H04L49/50
摘要： A network switch in a full-duplex IEEE 802.3 network includes a data monitor module that monitors data utilization between ports. Upon detection of a congestion condition in an output buffer, the data monitor module determines for each of the remaining network switch ports a traffic contribution relative to the total network traffic received by the one congested network switch port. The network switch includes a rate controller that generates rate control frames for the remaining network switch ports, where each rate control frame specifies a transmission rate for the transmitting network node based on the corresponding traffic contribution by the network node. The outputting of a rate control frame to a network node based on the corresponding traffic contribution optimizes elimination of the congestion condition by prioritizing the generation of rate control frames for the network node most responsible for creating the congestion condition. In addition, disruption of traffic is minimized in stations having little or no traffic contribution to the congested network switch port.
摘要翻译：全双工IEEE 802.3网络中的网络交换机包括监视端口之间的数据利用的数据监视模块。在检测到输出缓冲器中的拥塞情况时，数据监视模块针对每个剩余网络交换机端口确定相对于由一个拥塞的网络交换机端口接收到的总网络流量的业务贡献。网络交换机包括速率控制器，其为剩余的网络交换机端口生成速率控制帧，其中每个速率控制帧基于网络节点的相应业务贡献来指定发送网络节点的传输速率。基于对应的业务贡献，将速率控制帧输出到网络节点通过对最负责创建拥塞状况的网络节点的速率控制帧的产生优先级来优化消除拥塞状况。另外，对于拥塞的网络交换机端口几乎没有或没有业务贡献的站，业务中断被最小化。

33. 发明授权

US06031821A Apparatus and method for generating a pause frame in a buffered distributor based on lengths of data packets distributed according to a round robin repeater arbitration 失效
标题翻译：基于根据循环中继器仲裁分发的数据分组的长度，在缓冲分配器中生成暂停帧的装置和方法
公开(公告)号：US06031821A
公开(公告)日：2000-02-29
申请号：US914234
申请日：1997-08-19
申请人： Mohan V. Kalkunte , Ganatios Y. Hanna , Jayant Kadambi
发明人： Mohan V. Kalkunte , Ganatios Y. Hanna , Jayant Kadambi
IPC分类号： H04L12/56 , G01R31/08
CPC分类号： H04L47/10
摘要： A buffered distributor (i.e., a full-duplex repeater) having receive buffers for respective network ports calculates pause frames based on the size of stored data packets that need to be output by the repeater core according to a round robin sequence before congestion in an identified receive buffer is eliminated. The distribution core within the buffered distributor includes a linked list register that stores the determined links of received data packets for each network port. Upon detecting a congestion condition in one of the receive buffers for a corresponding port, the buffered distributor determines the relative position of the congested port within the round robin sequence, and calculates the pause interval based on the length of the data packets that need to be output before congestion is eliminated. The sum of the data packet lengths are compared to an output data rate of the distribution core, as well as switching delays within the core. The calculated pause frames, in conjunction with the prescribed congestion threshold, ensures that buffer sizes can be efficiently designed at a low cost, without compromising cost or risk of lost data packets.
摘要翻译：具有用于各个网络端口的接收缓冲器的缓冲分配器（即，全双工中继器）根据所识别的拥塞之前根据循环序列需要由中继器核心输出的存储的数据分组的大小来计算暂停帧接收缓冲区被消除。缓冲分配器内的分配核心包括链接列表寄存器，其存储针对每个网络端口的已接收数据分组的确定链路。一旦检测到对应端口的接收缓冲器之一的拥塞状况，缓存的分配器确定拥塞端口在循环序列内的相对位置，并根据需要的数据分组的长度来计算暂停间隔消除拥塞之前的输出。将数据分组长度的总和与分配核心的输出数据速率以及核心内的切换延迟进行比较。计算的暂停帧结合规定的拥塞阈值，确保缓冲区大小可以以低成本高效地设计，而不会降低成本或丢失数据包的风险。

34. 发明授权

US06195334B1 Apparatus and method for terminating a data transfer in a network switch in response to a detected collision 失效
标题翻译：响应于检测到的碰撞而终止网络交换机中的数据传输的设备和方法
公开(公告)号：US06195334B1
公开(公告)日：2001-02-27
申请号：US08992842
申请日：1997-12-18
申请人： Jayant Kadambi , Mohan V. Kalkunte
发明人： Jayant Kadambi , Mohan V. Kalkunte
IPC分类号： G08C1500
CPC分类号： H04L49/351 , H04L49/25
摘要： A network switch in a packet switched network has multiple network ports, each having a physical layer transceiver, a media access controller, transmit and receive buffers, and a bus interface for transferring data using a host processor. The network switch includes a low-latency mode, where a transfer request is initiated by a network switch port when the receive buffer includes 16 bytes of packet data. If during transfer the MAC detects a collision on the shared network medium, the network port generates a HALT signal in response to detecting a collision, enabling the host controller transferring data from the network port to abort the transfer, and begin transfer on another port. Status information also is stored in the receive buffer in response to the detected collision. Generation of the HALT signal enables the network switch to operate in low-latency mode without requiring substantial resources by the host processor to filter collision fragments or runt packets.
摘要翻译：分组交换网络中的网络交换机具有多个网络端口，每个网络端口具有物理层收发器，媒体访问控制器，发送和接收缓冲器以及用于使用主机处理器传送数据的总线接口。网络交换机包括低延迟模式，其中当接收缓冲器包括16字节的分组数据时，由网络交换机端口发起传送请求。如果在传输过程中MAC检测到共享网络介质上的冲突，则网络端口响应于检测到冲突而产生HALT信号，使得主机控制器能够从网络端口传送数据以中止传输，并开始在另一个端口上传输。响应于检测到的碰撞，状态信息也被存储在接收缓冲器中。产生HALT信号使得网络交换机能够以低等待时间模式运行，而不需要主机处理器的大量资源来过滤冲突分段或分组。

35. 发明授权

US6167054A Method and apparatus providing programmable thresholds for full-duplex flow control in a network switch 失效
标题翻译：为网络交换机中的全双工流量控制提供可编程阈值的方法和装置
公开(公告)号：US6167054A
公开(公告)日：2000-12-26
申请号：US992913
申请日：1997-12-18
申请人： Philip Simmons , Bahadir Erimli , Jinqlih Sang , Peter Ka-Fai Chow , Ian Crayford , Jayant Kadambi , Denise Kerstein , Thomas Jefferson Runaldue
发明人： Philip Simmons , Bahadir Erimli , Jinqlih Sang , Peter Ka-Fai Chow , Ian Crayford , Jayant Kadambi , Denise Kerstein , Thomas Jefferson Runaldue
IPC分类号： H04L13/08 , G06F11/26 , G06F12/00 , G06F13/00 , G06F13/10 , G06F13/16 , G06F13/24 , G06F15/00 , G06F15/16 , G08B5/00 , G11C11/412 , H04B7/14 , H04J3/02 , H04J3/12 , H04J3/22 , H04J3/24 , H04L12/18 , H04L12/24 , H04L12/28 , H04L12/413 , H04L12/44 , H04L12/46 , H04L12/50 , H04L12/54 , H04L12/66 , H04L12/861 , H04L12/863 , H04L12/879 , H04L12/931 , H04L12/933 , H04L12/935 , H04L12/937 , H04L12/939 , H04L12/947 , H04Q3/545 , H04Q11/00
CPC分类号： H04L49/3009 , G06F13/1605 , G06F13/24 , G11C11/412 , H04L12/1863 , H04L12/4641 , H04L12/4645 , H04L12/467 , H04L41/0213 , H04L47/50 , H04L47/6225 , H04L49/103 , H04L49/201 , H04L49/25 , H04L49/255 , H04L49/30 , H04L49/3027 , H04L49/3054 , H04L49/351 , H04L49/354 , H04L49/40 , H04L49/50 , H04L49/552 , H04L49/555 , H04L49/90 , H04L49/901 , H04L49/9047 , H04L49/9063 , H04L49/9073 , H04L49/9078 , H04L49/9084 , H04Q3/54591 , H04Q2213/1316 , H04Q2213/13162
摘要： A network having a shared memory architecture for storing data frames has a set of programmable thresholds that specify when flow control should be initiated on full-duplex network ports. The network switch includes a queue for storing free frame pointers that specify available memory locations in an external memory for storing data frames received from a network station. The network switch takes a frame pointer from a free buffer queue for each received data frame, and stores the received data frame in the location in external memory specified by the frame pointer while a decision making engine within the switch determines the appropriate destination ports. Flow control is initiated based on the number of available frame pointers by transmitting a PAUSE frame having a selected PAUSE interval to a transmitting network station. Specifically, a full-duplex port will output a PAUSE frame having a short, medium, or long programmed pause interval if the free buffer pool of available frame pointers falls below a high, medium, or low programmable threshold, respectively. The switch thus provides flexibility in generating variable-length PAUSE control frames to minimize wasting network bandwidth.
摘要翻译：具有用于存储数据帧的共享存储器架构的网络具有一组可编程阈值，其指定何时应当在全双工网络端口上启动流量控制。网络交换机包括用于存储空闲帧指针的队列，其指定用于存储从网络站接收的数据帧的外部存储器中的可用存储器位置。网络交换机从每个接收到的数据帧的空闲缓冲器队列中获取帧指针，并且将接收到的数据帧存储在由帧指针指定的外部存储器中的位置，同时交换机内的决策引擎确定适当的目的地端口。通过将具有所选暂停间隔的暂停帧发送到发射网络站，基于可用帧指针的数量启动流控制。具体来说，如果可用帧指针的空闲缓冲池分别低于高，中或低可编程阈值，则全双工端口将输出具有短，中或长编程暂停间隔的暂停帧。因此，交换机可以灵活地生成可变长度的PAUSE控制帧，以最大限度地减少浪费的网络带宽。

36. 发明授权

US5852723A Method and apparatus for prioritizing traffic in half-duplex networks 失效
标题翻译：用于在半双工网络中优先处理流量的方法和装置
公开(公告)号：US5852723A
公开(公告)日：1998-12-22
申请号：US692689
申请日：1996-08-06
申请人： Mohan Kalkunte , Jayant Kadambi , Jim Mangin , Shashank Merchant
发明人： Mohan Kalkunte , Jayant Kadambi , Jim Mangin , Shashank Merchant
IPC分类号： H04L12/413 , H04L12/64 , G06F13/00
CPC分类号： H04L12/40156 , H04L12/413 , H04L12/6418 , H04L2012/6435 , H04L2012/6448 , H04L2012/6454 , H04L2012/6464
摘要： Collision delay intervals are modified in Ethernet network devices transmitting priority data requiring a guaranteed latency by multiplying an integer multiple number of slot times with a fractional coefficient. A network device having priority data for transmission uses the conventional Truncated Binary Exponential Backoff (TBEB) algorithm during the first access attempt to calculate a collision delay interval from a randomly selected integer multiple of slot times. If the network device encounters another collision, the next randomly selected integer multiple of slot times is multiplied by the fractional coefficient. Use of the fractional coefficient during collision mediation on a half-duplex Ethernet network provides a bounded access latency for real-time and multimedia applications by granting the network device a higher probability of successfully accessing the network media.
摘要翻译：在以太网网络设备中修改冲突延迟间隔，通过将整数倍数的时隙时间乘以分数系数来传输需要保证延迟的优先级数据。具有传输优先权数据的网络设备在第一次访问尝试期间使用传统的截断二进制指数退避（TBEB）算法来从随机选择的时隙倍数的整数倍计算冲突延迟间隔。如果网络设备遇到另一个冲突，则下一个随机选择的时隙倍数乘以分数系数。在半双工以太网上的冲突中介中使用分数系数，通过授予网络设备成功访问网络媒体的更高概率，为实时和多媒体应用提供了有限的访问延迟。

37. 发明授权

US5812554A Efficiency of a network having a minimum data transmission time 失效
标题翻译：具有最小数据传输时间的网络的效率
公开(公告)号：US5812554A
公开(公告)日：1998-09-22
申请号：US654406
申请日：1996-05-28
申请人： Jayant Kadambi , Mohan Kalkunte , Jim Mangin
发明人： Jayant Kadambi , Mohan Kalkunte , Jim Mangin
IPC分类号： H04L12/413 , H04J3/24
CPC分类号： H04L12/413
摘要： Efficient communication in a network having a minimum data transmission time interval wherein a data packet is transmitted beginning at a start of the minimum data transmission time interval. An end of the minimum data transmission time interval is determined and then at least one next data packet is transmitted after the data packet if the end of the minimum data transmission time is after the end of the data packet.
摘要翻译：在具有最小数据传输时间间隔的网络中的高效通信，其中从最小数据传输时间间隔的开始开始发送数据分组。确定最小数据传输时间间隔的结束，并且如果最小数据传输时间的结束是在数据分组结束之后，则在数据分组之后发送至少一个下一个数据分组。

38. 发明授权

US5469439A Two priority fair distributed round robin protocol for a network having cascaded hubs 失效
标题翻译：具有级联集线器的网络的两个优先公平分配的循环协议
公开(公告)号：US5469439A
公开(公告)日：1995-11-21
申请号：US237746
申请日：1994-05-04
申请人： Patricia A. Thaler , Jayant Kadambi , Michael Spratt , Alan R. Albrecht , Steven H. Goody
发明人： Patricia A. Thaler , Jayant Kadambi , Michael Spratt , Alan R. Albrecht , Steven H. Goody
IPC分类号： H04L1/00 , H04L1/16 , H04L1/18 , H04L12/44 , H04L29/06 , H04L29/14
CPC分类号： H04L1/0083 , H04L1/1607 , H04L1/1819 , H04L1/1848 , H04L1/188 , H04L12/44 , H04L29/06 , H04L69/40 , H04L2001/0093
摘要： A network system includes end nodes which are connected to a plurality of cascaded hubs. A two priority protocol is provided for selecting end nodes to send network packets over the network. When at least one end node in the network system has a high priority network packet to send, each end node with a high priority network packet is acknowledged in turn. Each end node, when acknowledged, sends its high priority network packet through the network. When no end nodes have a high priority network packet, and at least one end node in the network system has a normal priority network packet to send, each end node with a normal priority network packet is acknowledged in turn. This includes a root hub acknowledging in turn each second level hub which is connected to an end node which has a normal priority network packet to send. Each second level hub, when acknowledged, proceeds to acknowledge in turn each end node which is connected to the second level hub and which has a normal priority network packet. Each end node, when acknowledged, sends its normal priority network packet. However, when the root hub receives a request for an end node to send a high priority packet, the root hub signals to the second level hub that a high priority request has been received. The second level hub stops acknowledging the end nodes connected to the second level hub which have a normal priority network packet. Then each end node with a high priority network packet is acknowledged in turn. Each end node, when acknowledged, sends its high priority network packet.
摘要翻译：网络系统包括连接到多个级联集线器的端节点。提供了两个优先级协议，用于选择端节点通过网络发送网络分组。当网络系统中的至少一个端节点具有要发送的高优先级网络分组时，依次确认具有高优先级网络分组的每个终端节点。每个端节点在被确认时，通过网络发送其高优先级的网络数据包。当没有终端节点具有高优先级的网络分组，并且网络系统中的至少一个终端节点具有要发送的正常优先级网络分组时，依次确认具有正常优先级网络分组的每个终端节点。这包括根集线器，依次确认连接到具有要发送的正常优先级网络分组的终端节点的每个第二级集线器。每个第二级集线器在被确认时，继续进行连接到第二级集线器并具有正常优先级网络分组的每个端节点。每个端节点在被确认时发送其正常优先级的网络分组。然而，当根集线器接收到终端节点发送高优先级分组的请求时，根集线器向第二级集线器发信号通知已经接收到高优先级请求。第二级集线器停止确认连接到具有正常优先级网络分组的第二级集线器的端节点。然后依次确认具有高优先级网络分组的每个终端节点。每个端节点在被确认时发送其高优先级的网络数据包。

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