公开(公告)号：US5764641A

公开(公告)日：1998-06-09

申请号：US525252

申请日：1995-09-08

申请人： Arthur Lin

发明人： Arthur Lin

IPC分类号： H04L12/56 ,  H04Q11/04

CPC分类号： H04Q11/0478 ,  H04L2012/5647 ,  H04L2012/5651 ,  H04L2012/5652 ,  H04L2012/5665

摘要： A switch in an asynchronous transfer mode system utilizes an early packet discard (EPD) scheme and discards all but the end-of-packet cell of packets that are expected to prevent other partially transmitted packets from being transmitted through the switch. The switch also utilizes an integrated tail packet discard (I-TPD) scheme and, once a cell of a packet has been discarded for any reason, discards all of the remaining cells of the packet except the end-of-packet cell. Each of the EPD and the I-TPD schemes retain the last cell of a packet in order to maintain packet boundaries. Further, they each set the loss-priority of the end-of-packet cell to high, to increase the likelihood that the cell will be transmitted through the remaining switches in the route to the station to which the packet is directed. When the end-of-packet cell is received, the switch retains the cell unless its maximum queue limit is exceeded, and resets any associated early or tail packet discard flag. When the beginning of the next packet is received, the switch checks its queue length against an associated queue limit and against a CLP and an EPD threshold to determine whether or not to retain the cell. If the cell is discarded, the switch invokes, as appropriate, either the EPD or I-TPD and thereafter discards cells of the same packet. It invokes EPD when the queue limit exceeds the EPD threshold, and invokes I-TPD if it discards this or any cell when (a) it is policing a usage or network parameter control violation, (b) its associated queue exceeds an applicable queue limit, or (c) it selectively discards low-priority cells.

摘要翻译： 异步传输模式系统中的交换机采用早期分组丢弃（EPD）方案，并丢弃预期阻止其他部分传输的分组通过交换机传输的分组的分组末端小区的所有信息。 该交换机还采用综合的尾部分组丢弃（I-TPD）方案，并且一旦分组的小区被任何原因丢弃，则丢弃除分组终端小区之外的所有分组的剩余小区。 EPD和I-TPD方案中的每一个保留分组的最后一个小区，以便保持分组边界。 此外，它们各自将分组末端信元的丢失优先级设置为高，以增加小区将通过路由中的剩余交换机发送到分组所针对的站的可能性。 当接收到分组终端单元时，交换机保留单元，除非超过了其最大队列限制，并重置任何相关的早期或尾部分组丢弃标志。 当接收到下一个分组的开始时，交换机根据相关联的队列限制和针对CLP和EPD阈值检查其队列长度，以确定是否保留小区。 如果单元被丢弃，交换机会适当地调用EPD或I-TPD，然后丢弃相同数据包的单元。 当队列限制超过EPD阈值时，它调用EPD，如果（a）它正在监管使用或网络参数控制违规，则调用I-TPD，（b）其关联的队列超过适用的队列限制 ，或（c）选择性地丢弃低优先级的单元。

公开(公告)号：US5691997A

公开(公告)日：1997-11-25

申请号：US535453

申请日：1995-09-28

申请人： Stanley A. Lackey, Jr.

发明人： Stanley A. Lackey, Jr.

IPC分类号： H04L1/00 ,  G06F11/10

CPC分类号： H04L1/0057 ,  H03M13/091

摘要： A destination station receives from a network a data packet that is transmitted as a plurality of cells and separately encodes each of the received cells, to produce associated, individual c-bit partial CRC remainders, where c is the number of bits in the CRC remainder associated with the packet. These partial CRC remainders correspond to the respective contributions that the cells make to the packet CRC pattern. The encoder appends the partial CRC remainders to the cells, and the station then stores them in an associated memory and links the individual cells to previously stored cells from the same packet with pointers. Once all the cells of a packet are encoded and stored, the destination station retrieves appended partial CRC remainders from the memory, and provides the remainders to a partial CRC encoder. The encoder manipulates the partial remainders and produces a packet CRC remainder. If the CRC packet is error-free, this packet CRC remainder matches the predetermined CRC pattern associated with the CRC code.

摘要翻译： 目的站从网络接收作为多个小区发送的数据分组，并分别编码每个接收到的小区，以产生相关联的单个c位部分CRC余数，其中c是CRC余数中的比特数 与分组关联。 这些部分CRC余数对应于小区对分组CRC模式的相应贡献。 编码器将部分CRC余数附加到单元，并且站然后将它们存储在相关联的存储器中，并且使用指针将来自相同分组的各个单元链接到先前存储的单元。 一旦分组的所有小区被编码和存储，目的站从存储器中检索附加的部分CRC余数，并将剩余部分提供给部分CRC编码器。 编码器操纵部分余数并产生分组CRC余数。 如果CRC分组是无错误的，则该分组CRC余数与与CRC码相关联的预定CRC模式匹配。

公开(公告)号：US5561669A

公开(公告)日：1996-10-01

申请号：US330074

申请日：1994-10-26

申请人： Mark A. Lenney ,  Hon W. Chin

发明人： Mark A. Lenney ,  Hon W. Chin

IPC分类号： H04L12/56 ,  H04J3/26

CPC分类号： H04L49/351 ,  H04L49/205 ,  H04L49/254 ,  H04L49/45

摘要： A switching fabric circuit that provides on-the-fly switching of packets, an expandable number of ports, and the interconnection of heterogeneous LAN segments. The switching fabric circuit includes a switching link that comprises a switching bus and a plurality of packet processors, wherein each packet processor is coupled between the switching bus and a LAN segment. The switching bus is a time division multiple access (TDMA) bus, and arbitration for switching bus access is distinct from arbitration for access to the ports of the switching fabric circuit. Switching bus arbitration is done according to one of two priority levels, wherein high priority requests are guaranteed access to the switching bus during a synchronization period in which the high priority requests are made. This provides for guaranteed throughput and on-the-fly switching of packets. Port arbitration may be either uniport port arbitration or multiport port arbitration. Port arbitration is characterized by the transmission of a POE mask by a source port to a destination port and by the subsequent transmission of a DPA signal by the destination port to the source port.

摘要翻译： 提供数据包的实时切换，可扩展数量的端口以及异构LAN段的互连的交换结构电路。 交换结构电路包括交换链路，其包括交换总线和多个分组处理器，其中每个分组处理器耦合在交换总线和LAN分段之间。 交换总线是时分多址（TDMA）总线，用于切换总线访问的仲裁与接入交换结构电路的端口的仲裁不同。 根据两个优先级中的一个完成切换总线仲裁，其中高优先级请求在其中进行高优先级请求的同步时段期间被保证访问交换总线。 这提供了数据包的保证吞吐量和即时切换。 端口仲裁可以是单向端口仲裁或多端口仲裁。 端口仲裁的特征在于将源端口的POE掩码传输到目的端口，并且由目的端口向源端口发送DPA信号。

公开(公告)号：US20170214739A1

公开(公告)日：2017-07-27

申请号：US15462861

申请日：2017-03-19

申请人： Cisco Systems, Inc.

发明人： Marc E. Mosko

IPC分类号： H04L29/08 ,  H04L12/755 ,  H04L29/12

CPC分类号： H04L67/104 ,  H04L45/021 ,  H04L61/305 ,  H04L67/06 ,  H04L67/1063 ,  H04L67/1074 ,  H04L67/327

摘要： The system receives a list of one or more name prefixes associated with an original name, wherein the original name corresponds to an original root manifest that indicates a set of original content objects and includes a set of content object hash (COH) values for the indicated set of original content objects, and wherein the original root manifest is registered with a tracking service. Based on a name prefix from the list, the system receives the original root manifest and selects a peer node that stores one or more of the original content objects. The system determines which original content objects are stored at the selected peer node and generates an interest for an original content object, wherein the name for the interest includes the name prefix, and wherein the third interest includes a COH value for an original content object stored at the selected peer node.

公开(公告)号：US20170201538A1

公开(公告)日：2017-07-13

申请号：US15470574

申请日：2017-03-27

申请人： CISCO SYSTEMS, INC.

发明人： Ignacio Solis ,  Marc E. Mosko

IPC分类号： H04L29/06 ,  H04L12/759

CPC分类号： H04L63/1416 ,  H04L12/6418 ,  H04L45/00 ,  H04L45/028 ,  H04L45/245 ,  H04L45/58 ,  H04L45/745 ,  H04L63/1433 ,  H04L63/145 ,  H04L63/1458 ,  H04L63/1466 ,  H04L63/162 ,  H04L63/304 ,  H04L67/2842 ,  H04L67/327

摘要： An object-forwarding device can block a malicious Content Object from being inserted into an Interest's reverse path over a named data network. During operation, the device can receive a Content Object via a first interface, and can perform a lookup operation in a Pending Interest Table (PIT) to identify a PIT entry for an Interest associated with the Content Object. The device then determines, from the PIT entry, an egress interface used to forward the Interest. If the device determines that the egress interface of the PIT entry matches the first interface for the Content Object, the device forwards the Content Object via a return interface specified in the PIT entry. On the other hand, if the egress interface of the PIT entry does not match the first interface for the Content Object, the device can block the Content Object.

公开(公告)号：US09590948B2

公开(公告)日：2017-03-07

申请号：US14570144

申请日：2014-12-15

申请人： CISCO SYSTEMS, INC.

发明人： Marc E. Mosko ,  Ignacio Solis

IPC分类号： H04L29/12 ,  H04L29/08 ,  H04L12/745 ,  H04L12/743

CPC分类号： H04L45/748 ,  H04L45/7453 ,  H04L61/1552 ,  H04L61/3005 ,  H04L61/303 ,  H04L67/327 ,  H04L69/329

摘要： One embodiment provides a system that facilitates forwarding of packets with variable length names. During operation, the system receives a packet with a hierarchically structured variable length identifier (HSVLI) which comprises contiguous name components ordered from a most general level to a most specific level. The system performs a longest prefix match lookup by selecting an entry from a first data structure of entries. The entries indicate a name component, forwarding information for the name component, and a plurality of entry identifiers that chain an entry to another entry. If a size of the name component is less than or equal to a predetermined threshold, the system selects an entry based on the name component. If the size is greater, the system selects an entry based on a compressed key which can be a hash of the name component. The system also resolves collisions associated with the selected entry.

摘要翻译： 一个实施例提供了一种便于转发具有可变长度名称的分组的系统。 在操作期间，系统接收具有分层结构的可变长度标识符（HSVLI）的分组，其包括从最通用级别到最特定级别排序的连续名称组件。 系统通过从条目的第一个数据结构中选择一个条目来执行最长的前缀匹配查找。 条目指示名称组件，用于名称组件的转发信息，以及将条目链接到另一个条目的多个条目标识符。 如果名称组件的大小小于或等于预定阈值，则系统基于名称组件来选择一个条目。 如果大小较大，系统将根据可能是名称组件的哈希值的压缩密钥来选择一个条目。 系统还可以解决与所选条目关联的冲突。

公开(公告)号：US09590887B2

公开(公告)日：2017-03-07

申请号：US14335615

申请日：2014-07-18

申请人： CISCO SYSTEMS, INC.

发明人： Priya Mahadevan ,  Glenn C. Scott ,  Marc E. Mosko

IPC分类号： G06Q10/00 ,  H04L12/751 ,  H04L12/755

CPC分类号： H04L45/026 ,  H04L45/021 ,  H04L67/10

摘要： One embodiment provides a system that facilitates a content requesting device to handle a potential timeout event. During operation, the system receives, by a content producing device, a packet that corresponds to a first Interest message from a content requesting device, where the first Interest includes a name. Responsive to determining that additional time is required to generate a matching Content Object for the first Interest, the system generates a notification message which indicates a time period after which a second Interest is to be sent out by the content requesting device. The name for the second Interest can be the same as the name for the first Interest or a new name as indicated in the notification message. The system transmits the notification message to the content requesting device, thereby facilitating the content requesting device to handle a potential timeout event.

摘要翻译： 一个实施例提供一种便于内容请求设备处理潜在超时事件的系统。 在操作期间，系统由内容产生设备接收来自内容请求设备的对应于第一兴趣消息的分组，其中第一兴趣包括姓名。 响应于确定为第一个兴趣生成匹配的内容对象所需的额外时间，系统生成指示由内容请求设备发送第二个兴趣的时间段的通知消息。 第二个兴趣的名称可以与通知消息中指示的第一个兴趣或新名称的名称相同。 系统将通知消息发送到内容请求设备，从而便于内容请求设备处理潜在的超时事件。

公开(公告)号：USD662496S1

公开(公告)日：2012-06-26

申请号：US29385260

申请日：2011-02-10

申请人： William Jeffrey Lewis ,  Chi-Hsiang Kao ,  Chih-Ling Lin ,  Wen-Pin Chen ,  Chien-Ju Huang

设计人： William Jeffrey Lewis ,  Chi-Hsiang Kao ,  Chih-Ling Lin ,  Wen-Pin Chen ,  Chien-Ju Huang

公开(公告)号：US07916690B2

公开(公告)日：2011-03-29

申请号：US12269423

申请日：2008-11-12

申请人： Bhautik Doshi ,  Madhavi Vulpala ,  Jyoti Jain ,  Roy Nobuo Nakashima

发明人： Bhautik Doshi ,  Madhavi Vulpala ,  Jyoti Jain ,  Roy Nobuo Nakashima

IPC分类号： H04W4/00

CPC分类号： H04W24/04 ,  H04W84/12

摘要： Methods, apparatuses and systems directed to, or facilitating, the graphical display of status information in wireless network management systems. In one implementation, the present invention provides a graphical user interface that allows a network administrator to readily ascertain the overall status of a wireless network, and quickly identify the network element(s) within the network that are associated with any potential problem or condition. In another implementation, the present invention provides a graphical user interface that provides status icons that efficiently convey status information for corresponding access points. In another implementation, the present invention provides a hierarchical network model that facilitates network data management, configuration and display tasks associated with wireless network management systems.

摘要翻译： 针对或促进无线网络管理系统中的状态信息的图形显示的方法，设备和系统。 在一个实现中，本发明提供了一种图形用户界面，其允许网络管理员容易地确定无线网络的总体状态，并且快速地识别与任何潜在问题或状况相关联的网络内的网络元件。 在另一个实施方式中，本发明提供一种图形用户界面，其提供有效地传达对应接入点的状态信息的状态图标。 在另一实施方式中，本发明提供了一种有助于与无线网络管理系统相关联的网络数据管理，配置和显示任务的分级网络模型。

公开(公告)号：US20100185919A1

公开(公告)日：2010-07-22

申请号：US12396651

申请日：2009-03-03

申请人： Matthew Todd Lawson ,  David S. Walker

发明人： Matthew Todd Lawson ,  David S. Walker

IPC分类号： H03M13/00

CPC分类号： H04L1/0061 ,  H03M13/09 ,  H04L2001/0094

摘要： A method for receiving packet data at a communication channel and transmitting the packet data over serial links of the communication channel. The packet data is sliced into n-bit data portions which are concatenated with a header prior to transmitting an n-bit portion across one of the serial links of the communication channel. The header includes a CRC to provide improved error detection.