Method and apparatus for facilitating asymmetric line rates in an Ethernet passive optical network
    3.
    发明授权
    Method and apparatus for facilitating asymmetric line rates in an Ethernet passive optical network 有权
    用于促进以太网无源光网络中的非对称线路速率的方法和装置

    公开(公告)号:US07525982B2

    公开(公告)日:2009-04-28

    申请号:US11228879

    申请日:2005-09-16

    IPC分类号: H04L12/28

    CPC分类号: H04J3/0652

    摘要: One embodiment of the present invention provides a method for facilitating asymmetric line rates in an Ethernet passive optical network (EPON) which includes a central node and at least one remote node. During operation, the system provides a downstream code-group clock, wherein each cycle thereof corresponds to a code group transmitted from the central node to a remote node. The system also provides an upstream code-group clock, wherein each cycle thereof corresponds to a code group received at the central node from a remote node. In addition, the system provides a multi-point control protocol (MPCP) clock, wherein the frequency ratio of the MPCP clock to the downstream code-group clock is different from the frequency ratio of the MPCP clock to the upstream code-group clock, thereby allowing the downstream transmission to be performed at a faster line rate than the upstream transmission line rate.

    摘要翻译: 本发明的一个实施例提供一种用于促进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)中的非对称线路速率的方法。 在操作期间,系统提供下游代码组时钟,其中每个周期对应于从中央节点发送到远程节点的代码组。 该系统还提供上行代码组时钟,其中每个周期对应于从远程节点在中央节点接收的代码组。 另外,该系统提供多点控制协议(MPCP)时钟,其中MPCP时钟与下游码组时钟的频率比不同于MPCP时钟与上行代码组时钟的频率比, 从而允许以比上行传输线路速率更快的线路速率执行下游传输。

    Method for data encryption in an ethernet passive optical network
    4.
    发明授权
    Method for data encryption in an ethernet passive optical network 有权
    以太网无源光网络数据加密方法

    公开(公告)号:US07349537B2

    公开(公告)日:2008-03-25

    申请号:US11078923

    申请日:2005-03-10

    CPC分类号: H04L9/12 H04L9/0637

    摘要: One embodiment of the present invention provides a system that decrypts downstream data in an Ethernet passive optical network (EPON). During operation, the system receives a data frame which is encrypted based on a remote input block and a session key, wherein the remote input block is constructed based on a remote cipher counter and a remote block counter. The system adjusts a local cipher counter based on a received checksum located in a preamble of the data frame, wherein the local cipher counter is substantially synchronized with the remote cipher counter. In addition, the system truncates the local cipher counter by discarding n least significant bits thereof. The system then constructs a local input block based on the truncated cipher counter and a local block counter for the received data frame. Next, the system decrypts the data frame based on the local input block and the session key.

    摘要翻译: 本发明的一个实施例提供一种解密以太网无源光网络(EPON)中的下游数据的系统。 在操作期间,系统接收基于远程输入块和会话密钥加密的数据帧,其中基于远程密码计数器和远程块计数器构建远程输入块。 该系统基于位于数据帧的前导码中的接收到的校验和来调整本地密码计数器,其中本地密码计数器基本上与远程密码计数器同步。 此外,系统通过丢弃其最低有效位来截断本地密码计数器。 然后,系统基于截断的密码计数器和接收到的数据帧的本地块计数器构建本地输入块。 接下来,系统基于本地输入块和会话密钥来解密数据帧。

    Method and apparatus for forwarding packets in an ethernet passive optical network
    5.
    发明授权
    Method and apparatus for forwarding packets in an ethernet passive optical network 有权
    用于在以太网无源光网络中转发数据包的方法和装置

    公开(公告)号:US06967949B2

    公开(公告)日:2005-11-22

    申请号:US10925175

    申请日:2004-08-23

    IPC分类号: H04Q11/00 H04L12/56

    摘要: One embodiment of the present invention provides a system that facilitates forwarding of packets in an Ethernet passive optical network (EPON), which includes a central node and at least one remote node. During operation, the system assigns a logical link identifier (LLID) to a remote node, wherein an LLID corresponds to a logical link between the central node and a remote node. The system also associates an LLID with a port of a switch within the central node, wherein the switch has a number of ports; wherein a port may be a physical port or a virtual port; and wherein the number of ports on the switch are divided into network-side ports and user-side ports. Upon receiving a downstream packet from a network-side port, the system searches a mapping table to determine whether one or more field values of the downstream packet correspond to any LLIDs or ports. If the one or more field values correspond to an LLID, the system assigns the LLID to the downstream packet and transmits the downstream packet to a remote node.

    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以太网无源光网络(EPON)中转发分组的系统。 在操作期间,系统向远程节点分配逻辑链路标识符(LLID),其中LLID对应于中心节点和远程节点之间的逻辑链路。 该系统还将LLID与中央节点内的交换机的端口相关联,其中交换机具有多个端口; 其中端口可以是物理端口或虚拟端口; 并且其中交换机上的端口数被划分为网络侧端口和用户侧端口。 在从网络侧端口接收到下行分组时,系统搜索映射表以确定下行分组的一个或多个字段值是否对应于任何LLID或端口。 如果一个或多个字段值对应于LLID,则系统向下游分组分配LLID,并将下行分组发送到远程节点。

    Method and system for protection switching in ethernet passive optical networks
    6.
    发明授权
    Method and system for protection switching in ethernet passive optical networks 有权
    以太网无源光网络保护倒换方法及系统

    公开(公告)号:US09319758B2

    公开(公告)日:2016-04-19

    申请号:US12565680

    申请日:2009-09-23

    摘要: One embodiment provides a system that performs protection switching in an Ethernet passive optical network (EPON), which includes an optical line terminal (OLT) and at least one optical network unit (ONU). The system is configured with at least one redundant component for the OLT and/or ONUs, wherein the redundant component can be optical or electrical, and can be a port, line card or link. The system provides protection by detecting a failure, and switching automatically to the redundant components to reduce service disruption time. The protection switching comprises: preserving the existing configuration over the loss of at least one of a multiple-point control protocol (MPCP) message; an operations, administration and maintenance (OAM) message; and a signal on the physical layer. The system recovers from the failure without performing ONU discovery.

    摘要翻译: 一个实施例提供一种在包括光线路终端(OLT)和至少一个光网络单元(ONU)的以太网无源光网络(EPON)中执行保护切换的系统。 该系统配置有用于OLT和/或ONU的至少一个冗余组件,其中冗余组件可以是光学的或电的,并且可以是端口,线路卡或链路。 该系统通过检测故障提供保护,并自动切换到冗余组件以减少服务中断时间。 所述保护切换包括:通过丢失多点控制协议(MPCP)消息中的至少一个来保留现有配置; 操作,管理和维护(OAM)消息; 和物理层上的信号。 系统从故障中恢复,无需执行ONU发现。

    METHOD AND SYSTEM FOR PROTECTION SWITCHING IN ETHERNET PASSIVE OPTICAL NETWORKS
    7.
    发明申请
    METHOD AND SYSTEM FOR PROTECTION SWITCHING IN ETHERNET PASSIVE OPTICAL NETWORKS 有权
    以太网被动光网络中的保护切换方法和系统

    公开(公告)号:US20100098407A1

    公开(公告)日:2010-04-22

    申请号:US12565680

    申请日:2009-09-23

    IPC分类号: H04J14/00 H04B10/00

    摘要: One embodiment provides a system that performs protection switching in an Ethernet passive optical network (EPON), which includes an optical line terminal (OLT) and at least one optical network unit (ONU). The system is configured with at least one redundant component for the OLT and/or ONUs, wherein the redundant component can be optical or electrical, and can be a port, line card or link. The system provides protection by detecting a failure, and switching automatically to the redundant components to reduce service disruption time. The protection switching comprises: preserving the existing configuration over the loss of at least one of a multiple-point control protocol (MPCP) message; an operations, administration and maintenance (OAM) message; and a signal on the physical layer. The system recovers from the failure without performing ONU discovery.

    摘要翻译: 一个实施例提供一种在包括光线路终端(OLT)和至少一个光网络单元(ONU)的以太网无源光网络(EPON)中执行保护切换的系统。 该系统配置有用于OLT和/或ONU的至少一个冗余组件,其中冗余组件可以是光学的或电的,并且可以是端口,线路卡或链路。 该系统通过检测故障提供保护,并自动切换到冗余组件以减少服务中断时间。 所述保护切换包括:通过丢失多点控制协议(MPCP)消息中的至少一个来保留现有配置; 操作,管理和维护(OAM)消息; 和物理层上的信号。 系统从故障中恢复,无需执行ONU发现。

    Method and apparatus for facilitating differentiated service qualities in an ethernet passive optical network
    8.
    发明授权
    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:US07664019B2

    公开(公告)日:2010-02-16

    申请号:US11223487

    申请日:2005-09-08

    IPC分类号: H04L12/56 H04B10/20

    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 registering multiple remote nodes in an ethernet passive optical network
    9.
    发明授权
    Method and apparatus for registering multiple remote nodes in an ethernet passive optical network 有权
    用于在以太网无源光网络中注册多个远程节点的方法和装置

    公开(公告)号:US07545813B2

    公开(公告)日:2009-06-09

    申请号:US10850738

    申请日:2004-05-21

    IPC分类号: H04L12/28

    摘要: One embodiment of the present invention provides a system that facilitates registration of remote nodes in an Ethernet passive optical network (EPON). The system includes a central node and at least one remote node, wherein a number of virtual remote nodes are coupled to a common physical remote node and transmit upstream data through a common transmitter within the common physical remote node. During an initial discovery cycle, the system receives a solicitation message from the central node at a remote node, wherein the solicitation message assigns a discovery slot in which an unregistered remote node may transmit a response message to the central node for registration. The system then transmits a response message from an unregistered remote node to register within the assigned discovery slot. If multiple virtual remote nodes coupled to the common physical remote node seek registration concurrently, the system controls the transmission of response messages from these virtual remote nodes to the central node so as to avoid collisions between response messages from different remote nodes.

    摘要翻译: 本发明的一个实施例提供一种便于在以太网无源光网络(EPON)中注册远程节点的系统。 该系统包括中央节点和至少一个远程节点,其中多个虚拟远程节点耦合到公共物理远程节点,并通过公共物理远程节点内的公共发射机发送上行数据。 在初始发现周期期间,系统从远程节点处的中央节点接收请求消息,其中,请求消息分配发现时隙,未注册的远程节点可以在其中向中央节点发送响应消息以进行注册。 然后,该系统从未注册的远程节点发送响应消息以在所分配的发现时隙内进行注册。 如果耦合到公共物理远程节点的多个虚拟远程节点同时寻求注册,则系统控制从这些虚拟远程节点到中央节点的响应消息的传输,以避免来自不同远程节点的响应消息之间的冲突。