公开(公告)号：US06618388B2

公开(公告)日：2003-09-09

申请号：US09755736

申请日：2001-01-05

申请人： Michael Yip ,  Steve Haddock

发明人： Michael Yip ,  Steve Haddock

IPC分类号： H04L1256

CPC分类号： H04L12/4645 ,  H04L12/2852

摘要： A method and system is provided in which MAN traffic is segregated at a customer and a provider domain level. A switch at the edge of the MAN encapsulates a data packet in a new header, which is used to specify the customer domain tags. The data packet is encapsulated further in another new header, which is used to specify new VMAN tags. The nested encapsulation is repeated as necessary until the data packet is forwarded to a remote switch at the edge of the MAN in accordance with the VMAN configuration or the source and destination address in the original data packet. The remote switch strips the VMAN tags from the data packet, and forwards the stripped data packet to the receiving customer domain as specified in the customer domain tag.

公开(公告)号：US07415016B1

公开(公告)日：2008-08-19

申请号：US10617911

申请日：2003-07-10

申请人： Michael Yip ,  Steve Haddock

发明人： Michael Yip ,  Steve Haddock

IPC分类号： H04L12/56

CPC分类号： H04L12/4645 ,  H04L12/2852

摘要： A method and system is provided in which MAN traffic is segregated at a customer and a provider domain level. A switch at the edge of the MAN encapsulates a data packet in a new header, which is used to specify the customer domain tags. The data packet is encapsulated further in another new header, which is used to specify new VMAN tags. The nested encapsulation is repeated as necessary until the data packet is forwarded to a remote switch at the edge of the MAN in accordance with the VMAN configuration or the source and destination address in the original data packet. The remote switch strips the VMAN tags from the data packet, and forwards the stripped data packet to the receiving customer domain as specified in the customer domain tag.

摘要翻译： 提供了一种方法和系统，其中MAN流量在客户和提供商域级别被隔离。 在城市边缘的一个交换机将一个数据包封装在一个新的头部，用于指定客户域标签。 数据包进一步封装在另一个新标头中，用于指定新的VMAN标签。 根据需要重复嵌套封装，直到根据VMAN配置或原始数据包中的源和目的地址将数据包转发到MAN边缘的远程交换机。 远程开关从数据包中剥离VMAN标签，并将剥离的数据包转发到客户域标签中指定的接收客户域。

公开(公告)号：US5978385A

公开(公告)日：1999-11-02

申请号：US886912

申请日：1997-07-02

申请人： Steve Haddock ,  Herb Schneider

发明人： Steve Haddock ,  Herb Schneider

IPC分类号： H04L12/413 ,  H04L12/46

CPC分类号： H04L12/46 ,  H04L12/413

摘要： An improved repeater or hub in a CSMA/CD based LAN that provides deterministic access to a shared communication medium for a limited number of nodes and improves the nondeterministic access latency for up to the maximum number of nodes allowed to be coupled to the repeater without requiring any modification to the adapter in each of the nodes. The repeater prevents a node involved in a collision from detecting that the collision occurred, and transmits the data packet received from that node to all other nodes connected to the repeater. The repeater accomplishes this by repeating the data packet received from that node during the collision, and discarding the data packets received from other nodes, thereby improving the performance of a CSMA/CD LAN by allowing a valid data packet to traverse the repeater and all communication medium segments attached thereto. When selecting which node shall continue transmitting, the repeater gives priority to the node with the currently highest number of outstanding packet retransmission attempts.

摘要翻译： 在基于CSMA / CD的LAN中的改进的中继器或集线器，其为有限数量的节点提供对共享通信介质的确定性访问，并且改善非确定性访问等待时间，以允许最多数量的节点被耦合到中继器，而不需要 对每个节点中的适配器进行任何修改。 中继器防止参与冲突的节点检测到冲突发生，并将从该节点接收的数据分组发送到连接到中继器的所有其他节点。 中继器通过在冲突期间重复从该节点接收的数据分组，并且丢弃从其他节点接收到的数据分组，从而通过允许有效数据分组穿过中继器和所有通信来提高CSMA / CD LAN的性能来实现这一点 连接到其上的中段。 当选择哪个节点应该继续发送时，中继器给出具有当前最高数量的未完成分组重传尝试的节点的优先级。

公开(公告)号：US5999538A

公开(公告)日：1999-12-07

申请号：US887356

申请日：1997-07-02

申请人： Steve Haddock ,  Herb Schneider

发明人： Steve Haddock ,  Herb Schneider

IPC分类号： H04L12/413 ,  H04L12/46

CPC分类号： H04L12/413 ,  H04L12/46

摘要： A repeater that prevents a node involved in a collision from detecting that the collision occurred, and transmits the data packet received from that node to all other nodes connected to the repeater. The repeater accomplishes this by repeating the data packet received from that node during the collision, and discarding the data packets received from other nodes, thereby allowing a valid data packet to traverse the repeater and all communication medium segments attached thereto. The repeater maintains a count of the collisions and retransmission attempts experienced by each node since that node's last successful data packet transmission. The count is used to prioritize which of the nodes involved in a subsequent collision will be allowed to continue to transmit. Such prioritization reduces any disparity in the number of retransmission attempts experienced by each node, thereby reducing the likelihood of a node dropping a data packet as occurs when the maximum number of retransmission attempts allowed for such node is reached.

摘要翻译： 防止涉及冲突的节点检测到发生冲突的中继器，并将从该节点接收的数据分组发送到连接到中继器的所有其他节点。 中继器通过在冲突期间重复从该节点接收到的数据分组，并且丢弃从其他节点接收到的数据分组，从而允许有效的数据分组穿过中继器和附加到其的所有通信媒体分段来实现。 由于该节点的上一次成功的数据包传输，中继器维护每个节点经历的冲突和重传尝试的计数。 该计数用于优先考虑后续冲突中涉及的哪些节点将被允许继续传输。 这样的优先级减少了每个节点经历的重传尝试次数的任何差异，从而降低了当达到这种节点允许的最大重传次数尝试时发生节点丢弃数据分组的可能性。