公开(公告)号：US20050058118A1

公开(公告)日：2005-03-17

申请号：US10925175

申请日：2004-08-23

申请人： Lawrence Davis ,  Edward Boyd ,  Glen Kramer

发明人： Lawrence Davis ,  Edward Boyd ,  Glen Kramer

IPC分类号： H04Q11/00 ,  H04L12/28

CPC分类号： H04L12/2856 ,  H04L12/2861 ,  H04L12/4641 ,  H04L12/4645 ,  H04L12/467 ,  H04Q11/0066 ,  H04Q11/0067 ,  H04Q11/0071

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.

公开(公告)号：US20070014575A1

公开(公告)日：2007-01-18

申请号：US11228879

申请日：2005-09-16

申请人： Glen Kramer ,  Edward Boyd ,  Ryan Hirth ,  Lawrence Davis ,  Lowell Lamb

发明人： Glen Kramer ,  Edward Boyd ,  Ryan Hirth ,  Lawrence Davis ,  Lowell Lamb

IPC分类号： H04J14/00

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。

公开(公告)号：US20050201554A1

公开(公告)日：2005-09-15

申请号：US11078923

申请日：2005-03-10

申请人： Glen Kramer ,  Lawrence Davis ,  Edward Boyd ,  Ryan Hirth ,  Ngo Ho

发明人： Glen Kramer ,  Lawrence Davis ,  Edward Boyd ,  Ryan Hirth ,  Ngo Ho

IPC分类号： H04L9/00 ,  H04L9/12

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。

公开(公告)号：US20050047782A1

公开(公告)日：2005-03-03

申请号：US10850738

申请日：2004-05-21

申请人： Lawrence Davis ,  Glen Kramer

发明人： Lawrence Davis ,  Glen Kramer

IPC分类号： H04B10/20 ,  H04L12/28 ,  H04L12/403 ,  H04Q11/00

CPC分类号： H04L12/2861 ,  H04L12/2856 ,  H04L12/2885 ,  H04Q11/0066 ,  H04Q11/0067 ,  H04Q11/0071 ,  H04Q2011/0064

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。

公开(公告)号：US20060039390A1

公开(公告)日：2006-02-23

申请号：US11223487

申请日：2005-09-08

申请人： Edward Boyd ,  Thyagarajan Subramanian ,  Lawrence Davis

发明人： Edward Boyd ,  Thyagarajan Subramanian ,  Lawrence Davis

IPC分类号： H04L12/28

CPC分类号： H04L47/10 ,  H04L12/4641 ,  H04L41/5003 ,  H04L41/5022 ,  H04L47/15 ,  H04L47/2408 ,  H04L47/2425 ,  H04L47/2491

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。

公开(公告)号：US20050201649A1

公开(公告)日：2005-09-15

申请号：US10802072

申请日：2004-03-15

申请人： Lawrence Davis ,  Dennis Smith

发明人： Lawrence Davis ,  Dennis Smith

IPC分类号： F16C33/38 ,  F16F7/104 ,  F16C33/76

CPC分类号： F16C33/3843 ,  F16C19/06 ,  F16C2300/02 ,  F16F7/104

摘要： Method and apparatus are provided for reducing vibration in bearings. There are provided first and second bearing rings with races, rotating members rollingly engaging both first and second bearing races, a cage for aligning the rotating members between the first and second bearing races, and vibration reduction means coupled to the cage. The vibration reduction means preferably comprises one or more resonant spring-mass combinations mounted in or on the cage. Damping means is preferably included with the resonant spring-mass combinations. The resonant frequencies of the unmodified bearing cage are first determined and then the spring-mass combinations tuned so that the spring-mass combinations when attached to the cage absorb vibrational energy that would otherwise excite cage vibrations. By selecting the type of spring-mass combination different vibrational modes can be suppressed and/or controlled.

摘要翻译： 提供了减少轴承振动的方法和装置。 提供具有座圈的第一和第二轴承环，滚动地接合第一和第二轴承座圈的旋转构件，用于对准第一和第二轴承座圈之间的旋转构件的保持架以及联接到保持架的减振装置。 减振装置优选地包括安装在笼中或笼上的一个或多个谐振弹簧组合组合。 谐振弹簧 - 质量组合优选地包括阻尼装置。 首先确定未修改的轴承保持架的共振频率，然后调整弹簧质量组合，使得当连接到保持架上时弹簧 - 质量组合吸收振动能量，否则其将激发笼振动。 通过选择弹簧 - 质量组合的类型，可以抑制和/或控制不同的振动模式。

公开(公告)号：USD393466S

公开(公告)日：1998-04-14

申请号：US28206

申请日：1994-09-09

申请人： William J. Scheid ,  Henry Wandt ,  Lawrence Davis

设计人： William J. Scheid ,  Henry Wandt ,  Lawrence Davis

公开(公告)号：US4961152A

公开(公告)日：1990-10-02

申请号：US205154

申请日：1988-06-10

申请人： Lawrence Davis

发明人： Lawrence Davis

IPC分类号： G06K9/62 ,  G06N3/12

CPC分类号： G06K9/6229 ,  G06N3/126

摘要： The adaptive computing system disclosed herein employs a data structure involving a multiplicity of classifiers, each of which includes a match string of characters which the system attempts to match up with messages generated either by the environment or by other classifiers. Associated with each match string is a response message definer or action part which defines the response to be given when a match is obtained. To facilitate matching in a noisy or changing environment, there is associated with each character in the match string a weighting value and the degree of match is judged by means of a score value which is a function of the weighting values of the characters which match between the match string and the message.

摘要翻译： 本文公开的自适应计算系统采用涉及多个分类器的数据结构，每个分类器包括字符匹配串，系统尝试与由环境或其他分类器产生的消息相匹配。 与每个匹配串相关联的是响应消息定义器或动作部分，其定义当获得匹配时要给出的响应。 为了促进在嘈杂或变化的环境中的匹配，与匹配串中的每个字符相关联的是加权值，并且通过分数值来判断匹配度，该分数值是匹配之间的字符的加权值的函数 匹配字符串和消息。

公开(公告)号：US20050100036A1

公开(公告)日：2005-05-12

申请号：US10703359

申请日：2003-11-06

申请人： Lawrence Davis

发明人： Lawrence Davis

IPC分类号： H04Q11/00 ,  H04J3/26

CPC分类号： H04Q11/0067 ,  H04Q11/0066 ,  H04Q11/0071 ,  H04Q2011/0064

摘要： One embodiment of the present invention provides a system that facilitates bandwidth-efficient multicast in EPONs. The system includes a central node and at least one remote node. Downstream data from the central node is broadcast through a passive optical coupler to remote nodes. In the other direction, upstream data from a remote node is transmitted through the passive optical coupler to the central node in a unicast manner. During operation, the system first selects a common multicast LLID to represent a number of remote nodes that comprise a multicast group. Upon receiving a multicast message destined to the multicast group, the system sends the multicast message along with the multicast LLID for the multicast group, whereby the multicast message is broadcast through the passive optical coupler in the downstream direction. This allows each remote node belonging to the multicast group to receive the multicast message by matching the multicast LLID.

摘要翻译： 本发明的一个实施例提供了一种在EPON中有助于带宽高效多播的系统。 该系统包括中央节点和至少一个远程节点。 来自中心节点的下行数据通过无源光耦合器广播到远程节点。 在另一个方向上，来自远程节点的上行数据通过无源光耦合器以单播方式发送到中央节点。 在操作期间，系统首先选择公共多播LLID来表示组成多播组的多个远程节点。 发送到组播组的组播消息后，系统发送组播消息和组播组播组播组播LLID，从而通过无源光耦合器向下游方向广播组播消息。 这允许属于多播组的每个远程节点通过匹配多播LLID来接收多播消息。