Method and system for accommodating different clock frequencies in an Ethernet passive optical network
    12.
    发明申请
    Method and system for accommodating different clock frequencies in an Ethernet passive optical network 有权
    用于在以太网无源光网络中适应不同时钟频率的方法和系统

    公开(公告)号:US20070003282A1

    公开(公告)日:2007-01-04

    申请号:US11478492

    申请日:2006-06-28

    IPC分类号: H04J14/00

    摘要: One embodiment of the present invention provides a system that accommodates different clock frequencies in an EPON. The system receives a signal from the OLT at the ONU and derives an OLT clock. The system also maintains a local clock. The system further receives from the OLT an assignment for an upstream transmission window, during which the ONU can transmit an upstream data burst to the OLT based on the local clock. The system adjusts the number of bits of the data burst without affecting the payload data carried in the data burst, thereby allowing the data burst to fit properly within the upstream transmission window and compensating for frequency differences between the local clock and the OLT clock. The system transmits the data burst based on the local clock in the upstream transmission window.

    摘要翻译: 本发明的一个实施例提供一种在EPON中适应不同时钟频率的系统。 系统从ONU接收来自OLT的信号,得到OLT时钟。 该系统还维护本地时钟。 该系统还从OLT接收用于上行传输窗口的分配,在该传输窗口期间,ONU可以基于本地时钟向OLT发送上行数据突发。 该系统调整数据脉冲串的位数,而不影响数据脉冲串中承载的有效载荷数据,从而允许数据脉冲串适配于上游传输窗口内,并补偿本地时钟与OLT时钟之间的频率差异。 系统根据上行传输窗口中的本地时钟传输数据脉冲串。

    Method and apparatus for facilitating differentiated service qualities in an ethernet passive optical network
    14.
    发明申请
    Method and apparatus for facilitating differentiated service qualities in an ethernet passive optical network 失效
    用于以太网无源光网络中促进差异化服务质量的方法和装置

    公开(公告)号:US20060039390A1

    公开(公告)日:2006-02-23

    申请号:US11223487

    申请日:2005-09-08

    IPC分类号: H04L12/28

    摘要: One embodiment of the present invention provides a system for forwarding packets in an Ethernet passive optical network (EPON) which includes a central node and at least one remote node. During operation, the system associates a logical link identifier (LLID) to a logical link between the central node and a remote node, wherein the logical link corresponds to a priority level based on a certain service level agreement (SLA). After receiving a packet to be forwarded to a remote node, the system then determines the value of one or more fields within the packet which is used to indicate a priority level for the packet. Subsequently, the system assigns an LLID to the packet based on the value of the one or more fields, thereby facilitating differentiated service qualities within the EPON.

    摘要翻译: 本发明的一个实施例提供了一种用于在包括中央节点和至少一个远程节点的以太网无源光网络(EPON)中转发分组的系统。 在操作期间,系统将逻辑链路标识符(LLID)与中心节点和远程节点之间的逻辑链路相关联,其中逻辑链路基于特定服务级别协议(SLA)对应于优先级。 在接收到要转发到远程节点的分组之后,系统然后确定用于指示分组的优先级的分组内的一个或多个字段的值。 随后,系统基于一个或多个字段的值向该分组分配LLID,从而促进EPON内的差异化服务质量。

    Method and apparatus for dynamically allocating upstream bandwidth in passive optical networks
    15.
    发明申请
    Method and apparatus for dynamically allocating upstream bandwidth in passive optical networks 失效
    在无源光网络中动态分配上行带宽的方法和装置

    公开(公告)号:US20050058135A1

    公开(公告)日:2005-03-17

    申请号:US10663608

    申请日:2003-09-15

    IPC分类号: H04L12/56

    摘要: One embodiment of the present invention provides a system that facilitates dynamic allocation of upstream bandwidth in a passive optical network which includes a central node and at least one remote node. Each remote node is coupled to at least one logical entity, which corresponds to a device or a user, that transmits upstream data to the central node and receives downstream data from the central node. The central node is coupled to an external network outside of the passive optical network through a shared out-going uplink.

    摘要翻译: 本发明的一个实施例提供了一种有助于在包括中央节点和至少一个远程节点的无源光网络中动态分配上行带宽的系统。 每个远程节点耦合到至少一个对应于设备或用户的逻辑实体,该逻辑实体将上行数据发送到中央节点并从中央节点接收下游数据。 中央节点通过共享的外向上行链路耦合到无源光网络外部的外部网络。

    Method and apparatus for switching packets in a passive optical network
    19.
    发明申请
    Method and apparatus for switching packets in a passive optical network 失效
    用于在无源光网络中切换分组的方法和装置

    公开(公告)号:US20050220129A1

    公开(公告)日:2005-10-06

    申请号:US10814929

    申请日:2004-03-30

    申请人: Edward Boyd

    发明人: Edward Boyd

    摘要: One embodiment of the present invention provides a system that performs packets switching in a passive optical network which includes a central node and at least one remote node. After receiving a packet, the system obtains a first set of results by performing a first lookup based on a first set of values derived from the packet. The system also obtains a second set of results by performing a second lookup based on a second set of values derived from the packet. Next, the system merges the first set of results and the second set of results, and produces a merged value. The system then obtains a subsequent result by performing a subsequent lookup with the merged value. If the packet is a downstream packet, the system derives a logical identifier corresponding to one or more remote nodes from the subsequent result. The system then incorporates the logical identifier into the packet and transmits the packet to one or more remote nodes.

    摘要翻译: 本发明的一个实施例提供一种在包括中央节点和至少一个远程节点的无源光网络中执行分组交换的系统。 在接收到分组之后,系统通过基于从分组导出的第一组值执行第一查找来获得第一组结果。 系统还通过基于从分组导出的第二组值执行第二查找来获得第二组结果。 接下来,系统将第一组结果和第二组结果合并,并产生合并值。 然后,系统通过执行具有合并值的后续查找来获得后续结果。 如果分组是下行分组,则系统从随后的结果中导出与一个或多个远程节点对应的逻辑标识符。 然后,系统将逻辑标识符合并到分组中,并将分组发送到一个或多个远程节点。