公开(公告)号：US08077714B2

公开(公告)日：2011-12-13

申请号：US12034830

申请日：2008-02-21

申请人： Con Cremin ,  Maurice Gleeson ,  Jennifer Hamilton ,  Niall Hanrahan ,  Micheal Lardner ,  Sorcha Callaghan ,  Anne G O'Connell ,  Eugene G O'Neill

发明人： Con Cremin ,  Maurice Gleeson ,  Jennifer Hamilton ,  Niall Hanrahan ,  Micheal Lardner ,  Sorcha Callaghan ,  Anne G O'Connell ,  Eugene G O'Neill

IPC分类号： H04L12/28

CPC分类号： H04L47/50

摘要： Multicast packets that are received on a port of a network device and forwarded to multiple output ports are stored in memory and respective primary control entries which define them are converted to secondary control entries defining multiple unicast packets before a scheduling algorithm is applied. The packets are reconstituted after the application of the scheduling algorithm has been applied to the control entries. For VPLS packets that are received on a single port and replicated multiple times on one or more output ports, a replication database may be used in conjunction with a replication engine to convert the control entry for a received packet into multiple control entries defining unicast packets for each of the destination ports before the scheduling algorithm is applied. This method is applicable to the replication of packets onto a Virtual Private LAN.

摘要翻译： 在网络设备的端口上接收并转发到多个输出端口的组播数据包被存储在存储器中，并且在应用调度算法之前，将定义它们的各个主控制条目转换为定义多个单播数据包的辅助控制条目。 在将调度算法应用于控制条目之后，分组被重构。 对于在单个端口上接收并在一个或多个输出端口上多次复制的VPLS数据包，复制数据库可与复制引擎结合使用，以将接收到的数据包的控制条目转换为定义单播数据包的多个控制条目 应用调度算法之前的每个目的端口。 该方法适用于将数据包复制到虚拟专用LAN上。

公开(公告)号：US5465340A

公开(公告)日：1995-11-07

申请号：US828358

申请日：1992-01-30

申请人： Tadhg Creedon ,  Eugene G. O'Neill ,  Anne O'Connell

发明人： Tadhg Creedon ,  Eugene G. O'Neill ,  Anne O'Connell

IPC分类号： G06F11/00 ,  G06F13/28 ,  G06F13/26

CPC分类号： G06F11/0751 ,  G06F13/28

摘要： A direct memory access controller (DMAC) is provided to transfer bytes from arbitrary offset byte boundaries while performing data check operations in parallel to the movement of data in parallel through the DMA controller. The DMA controller moves data during each memory cycle and validates the moved data at the destination memory during the writing of bytes to the destination address.

摘要翻译： 提供直接存储器访问控制器（DMAC），用于从任意偏移字节边界传送字节，同时通过DMA控制器并行执行与数据移动并行的数据检查操作。 DMA控制器在每个存储器循环期间移动数据，并在将字节写入目标地址期间验证目标存储器上移动的数据。

公开(公告)号：US5185537A

公开(公告)日：1993-02-09

申请号：US828244

申请日：1992-01-30

申请人： Tadhg Creedon ,  Eugene G. O'Neill ,  Jerome A. Nolan

发明人： Tadhg Creedon ,  Eugene G. O'Neill ,  Jerome A. Nolan

IPC分类号： H03K5/1252

CPC分类号： H03K5/1252

摘要： A digital glitch filter includes first and second NOR gates coupled with feedback to form a first sampling stage, third and fourth NOR gates coupled to the output of the first and second NOR gate, respectively, and fifth and sixth NOR gates coupled with feedback to form a second sampling stage and coupled to the output of the third and fourth NOR gate, respectively, as well as three AND gates. A clock pulse generator is used to generate the pulse signals required by the glitch filter. For multiple-signal applications, the glitch filter requires relatively few gates.

摘要翻译： 数字毛刺滤波器包括与反馈耦合以形成第一采样级的第一和第二或非门，分别耦合到第一和第二或非门的输出的第三和第四或非门，以及耦合到反馈的第五和第六或非门 第二采样级并且分别耦合到第三和第四或非门的输出以及三个与门。 时钟脉冲发生器用于产生毛刺滤波器所需的脉冲信号。 对于多信号应用，毛刺滤波器需要相对较少的门。

公开(公告)号：US20080253370A1

公开(公告)日：2008-10-16

申请号：US12034830

申请日：2008-02-21

申请人： Con Cremin ,  Maurice Gleeson ,  Jennifer Hamilton ,  Niall Hanrahan ,  Michael Lardner ,  Sorcha Callaghan ,  Anne G. O'Connell ,  Eugene G. O'Neill

发明人： Con Cremin ,  Maurice Gleeson ,  Jennifer Hamilton ,  Niall Hanrahan ,  Michael Lardner ,  Sorcha Callaghan ,  Anne G. O'Connell ,  Eugene G. O'Neill

IPC分类号： H04L12/56

CPC分类号： H04L47/50

摘要： Multicast packets that are received on a port of a network device and forwarded to multiple output ports are stored in memory and respective primary control entries which define them are converted to secondary control entries defining multiple unicast packets before a scheduling algorithm is applied. The packets are reconstituted after the application of the scheduling algorithm has been applied to the control entries. For VPLS packets that are received on a single port and replicated multiple times on one or more output ports, a replication database may be used in conjunction with a replication engine to convert the control entry for a received packet into multiple control entries defining unicast packets for each of the destination ports before the scheduling algorithm is applied. This method is applicable to the replication of packets onto a Virtual Private LAN.

摘要翻译： 在网络设备的端口上接收并转发到多个输出端口的组播数据包被存储在存储器中，并且在应用调度算法之前，将定义它们的各个主控制条目转换为定义多个单播数据包的辅助控制条目。 在将调度算法应用于控制条目之后，分组被重构。 对于在单个端口上接收并在一个或多个输出端口上多次复制的VPLS数据包，复制数据库可与复制引擎结合使用，以将接收到的数据包的控制条目转换为定义单播数据包的多个控制条目 应用调度算法之前的每个目的端口。 该方法适用于将数据包复制到虚拟专用LAN上。