-
1.发明授权Map message expediency monitoring and automatic delay adjustments in M-CMTS 有权M-CMTS中的地图消息功能监控和自动延时调整公开(公告)号：US08081659B2
公开(公告)日：2011-12-20
申请号：US12167168
申请日：2008-07-02
IPC分类号： H04J3/16
CPC分类号： H04J3/1694 , H04L12/2801 , H04L12/2861
摘要： An M-CMTS compatible UEQAM device implements circuitry to identify and analyze MAP message in the data stream sent from the M-CMTS Core with respect to timing information embedded in those messages. The improved UEQAM will then create a specific message as an extension to DEPI to communicate that information to the M-CMTS Core. The M-CMTS Core will employ that analysis to automatically adjust MAP message advance time to reduce delay and thus improve system performance. This invention will provide a closed-loop between the M-CMTS Core and the UEQAM where valuable transmission information will periodically be fed back from UEQAM-to-M-CMTS Core in real-time.
摘要翻译： M-CMTS兼容的UEQAM设备实现电路，用于识别和分析从M-CMTS核心发送的数据流中MAP消息相对于嵌入在那些消息中的定时信息。 然后，改进的UEQAM将创建特定消息作为DEPI的扩展，以将该信息传送到M-CMTS核心。 M-CMTS核心将采用该分析来自动调整MAP消息提前时间，以减少延迟，从而提高系统性能。 本发明将提供M-CMTS核心和UEQAM之间的闭环，其中有价值的传输信息将周期性地从UEQAM到M-CMTS核心实时反馈。
-
2.发明授权Downstream remote physical interface for modular cable modem termination system 有权用于模块化电缆调制解调器终端系统的下行远程物理接口公开(公告)号：US07688828B2
公开(公告)日：2010-03-30
申请号：US11134589
申请日：2005-05-17
CPC分类号： H04L12/2801 , H04L67/00 , H04L69/16 , H04L69/161 , H04L69/164 , H04L2212/00
摘要： A modular Cable Modem Termination System (CMTS) includes a packet shelf operating a Data Over Cable Service Interface Specifications (DOCSIS) Media Access Control (MAC) framer. One or more downstream Physical Interface (PHY) shelves receive DOCSIS data from the packet shelf over a packet switched network and modulate the DOCSIS data for sending on a downstream path of a cable plant. One or more upstream PHY shelves send DOCSIS data received from an upstream path of the cable plant over the packet switched network to the packet shelf. By separating the PHY components from the MAC and from the system software, the PHY components for a Hybrid Fiber Coax (HFC) plant may be replaced with different PHY components for other access technologies such as wireless, Digital Subscriber Lines (DSL), Ethernet-to-the-Home, Fiber-to-the-Home, or fiber Passive Optical Networks (PONs).
摘要翻译： 模块化电缆调制解调器终端系统（CMTS）包括操作数据有线业务接口规范（DOCSIS）媒体接入控制（MAC）成帧器的分组机架。 一个或多个下行物理接口（PHY）机架通过分组交换网络从分组机架接收DOCSIS数据，并且调制DOCSIS数据以在电缆设备的下游路径上发送。 一个或多个上游PHY层架将从电缆设备的上行路径接收的DOCSIS数据通过分组交换网络发送到分组架。 通过将PHY组件与MAC和系统软件分离，用于混合光纤同轴电缆（HFC）设备的PHY组件可以用于其他接入技术的不同PHY组件，例如无线，数字用户线（DSL），以太网 - 光纤到户或光纤无源光网络（PON）。
-
公开(公告)号：US07656890B2
公开(公告)日：2010-02-02
申请号：US11484288
申请日：2006-07-10
CPC分类号： H04L12/2801 , H04N21/242
摘要： A dynamic channel change technique is disclosed which may be implemented between nodes and a Head End of an access network. Initially a network device may communicate with the Head End via a first downstream channel and a first upstream channel. When the network device receives a dynamic channel change request which includes instructions for the network device to switch to a second downstream channel, the network device may respond by switching from the first downstream channel to the second downstream channel. Thereafter, the network device may communicate with the Head End via the second downstream channel and first upstream channel. Further, according to a specific embodiment, the dynamic channel change request may also include an upstream channel change request for causing the network device to switch from a first upstream channel to a second upstream channel.
-
4.发明授权公开(公告)号：US07639617B2
公开(公告)日：2009-12-29
申请号：US11131766
申请日：2005-05-17
CPC分类号： H04L12/4633 , H04L12/2801
摘要： A modular Cable Modem Termination System (CMTS) includes a packet shelf operating a Data Over Cable Service Interface Specifications (DOCSIS) Media Access Control (MAC) framer. One or more downstream Physical Interface (PHY) shelves receive DOCSIS data from the packet shelf over a packet switched network and modulate the DOCSIS data for sending on a downstream path of a cable plant. One or more upstream PHY shelves send DOCSIS data received from an upstream path of the cable plant over the packet switched network to the packet shelf. By separating the PHY components from the MAC and from the system software, the PHY components for a Hybrid Fiber Coax (HFC) plant may be replaced with different PHY components for other access technologies such as wireless, Digital Subscriber Lines (DSL), Ethernet-to-the-Home, Fiber-to-the-Home, or fiber Passive Optical Networks (PONs).
摘要翻译： 模块化电缆调制解调器终端系统（CMTS）包括操作数据有线服务接口规范（DOCSIS）媒体访问控制（MAC）成帧器的分组机架。 一个或多个下行物理接口（PHY）机架通过分组交换网络从分组机架接收DOCSIS数据，并且调制DOCSIS数据以在电缆设备的下游路径上发送。 一个或多个上游PHY层架将从电缆设备的上行路径接收的DOCSIS数据通过分组交换网络发送到分组架。 通过将PHY组件与MAC和系统软件分离，用于混合光纤同轴电缆（HFC）设备的PHY组件可以被用于其他接入技术的不同PHY组件来替代，诸如无线，数字用户线（DSL），以太网 - 光纤到户或光纤无源光网络（PON）。
-
公开(公告)号：US07197052B1
公开(公告)日：2007-03-27
申请号：US10128005
申请日：2002-04-22
申请人： Daniel W. Crocker
发明人： Daniel W. Crocker
IPC分类号： H04J3/24
CPC分类号： H04L12/2801 , H04L45/24 , H04L45/28
摘要： According to specific embodiments of the present invention, a standardized interface is provided for enabling controlled communication between MAC and PHY devices of an access network. In one embodiment, a vendor independent interface is described which may be implemented between a DOCSIS MAC layer and a DOCSIS PHY layer of a DOCSIS enabled data network, in order to enable any DOCSIS MAC and DOCSIS PHY devices (which may be from different vendors) to communicate with each other. Using the standardized interface, component manufacturers are able to combine different MAC and PHY devices from different vendors, thereby facilitating price and value competition between vendors. The standardized interface technique of the present invention may be extensible in ways which allow multiple PHY devices to share the same interface. Further, the interface technique of the present invention may be applied to a variety of different shared-access networks which use at least one shared access communication channel to communicate between a plurality of nodes in the network and a Head End of the network.
摘要翻译： 根据本发明的具体实施例，提供了一种用于实现接入网络的MAC和PHY设备之间的受控通信的标准接口。 在一个实施例中，描述了可以在启用DOCSIS的数据网络的DOCSIS MAC层和DOCSIS PHY层之间实现供应商独立接口，以便能够使得任何DOCSIS MAC和DOCSIS PHY设备（其可能来自不同供应商） 相互沟通。 使用标准化接口，组件制造商能够组合来自不同供应商的不同MAC和PHY设备，从而促进供应商之间的价格和价值竞争。 本发明的标准化接口技术可以以允许多个PHY设备共享相同接口的方式进行扩展。 此外，本发明的接口技术可以应用于使用至少一个共享接入通信信道在网络中的多个节点和网络的头端之间进行通信的各种不同的共享接入网络。
-
公开(公告)号：US07139923B1
公开(公告)日：2006-11-21
申请号：US09894864
申请日：2001-06-27
申请人： John T. Chapman , Daniel W. Crocker
发明人： John T. Chapman , Daniel W. Crocker
IPC分类号： G06F1/04
CPC分类号： H04N21/242 , H04J3/0664 , H04L12/2801 , H04N7/17309 , H04N21/6168
摘要： A master clock reference signal may be provided to selected packet fiber nodes in order to synchronize the local clock reference signals generated at selected devices in a cable network. In this way, selected portions of the cable network may be synchronized to a common timing reference signal. Additionally, synchronized timestamp information may also be provided to selected network devices in order to achieve synchronization of timestamps across a selected portion of the cable network.
-
7.发明授权Technique for synchronizing multiple access controllers at the head end of an access network 有权在接入网络的头端同步多个接入控制器的技术公开(公告)号：US07065779B1
公开(公告)日：2006-06-20
申请号：US09490761
申请日：2000-01-24
申请人： Daniel W. Crocker , John T. Chapman
发明人： Daniel W. Crocker , John T. Chapman
IPC分类号： H04N7/16
CPC分类号： H04L12/2801 , H04N21/242
摘要： A technique is described which may be used to synchronize a plurality of different access controllers which control a plurality of distinct ports at the Head End of an access network. In the context of a cable network, the technique of the present invention may be used to synchronize desired upstream and/or downstream channels across different line cards within a Cable Modem Termination System (CMTS). The technique involves utilizing a master time reference device which maintains and updates a current time reference, and periodically distributes synchronization signals to desired line cards in the system in order to synchronize these line cards. In a specific embodiment, the synchronization signals include current timestamp data generated from the master time reference device and distributed to all (or selected) line cards in the system. A slave time reference device on each of the line cards receives the periodic synchronization updates and uses the synchronization data to remain synchronized with the master time reference device. There are also provisions in this protocol to allow for hot insertion and removal of line cards, software reset or loading of the master and/or slave time reference devices, and redundant master time reference devices, including master time reference device fault detection and automatic fail over.
摘要翻译： 描述了一种技术，其可以用于同步多个不同的访问控制器，其控制在接入网络的头端处的多个不同端口。 在有线网络的上下文中，本发明的技术可以用于在电缆调制解调器终端系统（CMTS）内的不同线路卡上同步期望的上行和/或下行信道。 该技术涉及利用维持和更新当前时间基准的主时间参考装置，并且将同步信号周期性地分配给系统中期望的线路卡，以便同步这些线路卡。 在一个具体实施例中，同步信号包括从主时间参考设备产生并分发给系统中的所有（或选定）线路卡的当前时间戳数据。 每个线路卡上的从时间参考设备接收周期性同步更新，并使用同步数据与主时间参考设备保持同步。 本协议还规定允许热插拔线路卡，主机和/或从机时间参考设备的软件复位或加载，以及冗余主时间参考设备，包括主时间参考设备故障检测和自动故障 过度。
-
8.发明授权System for managing signals in different clock domains and a programmable digital filter 有权用于管理不同时钟域中的信号的系统和可编程数字滤波器公开(公告)号：US06823029B1
公开(公告)日：2004-11-23
申请号：US09713156
申请日：2000-11-14
IPC分类号： H04L700
CPC分类号： H04L7/0012 , H04L7/02
摘要： A synchronizer circuit manages signals in different clock domains by generating clock pulses synchronized with a system clock. The clock pulses are generated at a rate proportional to the frequency of a clock operating in a first clock domain. Digital circuitry is then driven at the frequency of the first clock and in the time domain of the system clock. A hand-shaking protocol prevents the synchronizer circuit from going into a metastable condition when passing clock or data signals into different time domains. A programmable digital filter includes multiple sampling stages that sample an input signal. A detection circuit has inputs coupled to the outputs of the multiple sampling stages and changes the logic state of an output signal when no glitches are detected in the samples of the input signal. A control circuit selectively varies a time period used by the filter for sampling the input signal.
摘要翻译： 同步器电路通过产生与系统时钟同步的时钟脉冲来管理不同时钟域中的信号。 时钟脉冲以与在第一时钟域中操作的时钟的频率成比例的速率产生。 然后以第一时钟的频率和系统时钟的时域驱动数字电路。 握手协议可防止同步电路在将时钟或数据信号传输到不同的时域时进入亚稳态。 可编程数字滤波器包括对输入信号进行采样的多个采样级。 检测电路具有耦合到多个采样级的输出的输入，并且当在输入信号的采样中没有检测到毛刺时改变输出信号的逻辑状态。 控制电路选择性地改变由滤波器使用的时间段以对输入信号进行采样。
-
9.发明授权Apparatus and method for maintaining packet ordering over parallel links of a crossbar based switch fabric 失效用于通过基于交叉开关的交换结构的并行链路维护分组排序的装置和方法公开(公告)号：US06351454B1
公开(公告)日：2002-02-26
申请号：US09122418
申请日：1998-07-24
IPC分类号： H04L1256
摘要： A data exchange system includes at least one transmitting agent, at least one receiving agent, and a plurality of data links each having a crossbar coupling respective transmitting agents and receiving agents. A stream of data packets including at least one Order Critical Flow of data packets having a critical order to be sent from the transmitting agent to the receiving agent is divided for transmission among the plurality of data links. Multiple Order Critical Flows between the transmitting agent and the receiving agent are possible and the packets within such Order Critical Flows can be intermixed for transmission (along with packets from other Non-Order Critical Flows). The packets are transmitted over the data links so that packets from the same Order Critical Flow are transmitted over the same data link (while packets from that Order Critical Flow are in the Transmit Link Queue) and the packets are sequentially numbered, based upon the time when the packet was first received (and not the link over which the packet was received) upon the beginning of receipt by the receiving agent and reassembled by the receiving agent into a stream of data packets in accordance with the numbering sequence, thus maintaining the order of all Order Critical Flows.
摘要翻译： 数据交换系统包括至少一个发送代理，至少一个接收代理和多个数据链路，每个数据链路具有连接相应发送代理和接收代理的交叉开关。 将包含至少一个具有要从发送代理发送到接收代理的关键订单的数据包的订单关键流的数据包流划分成多个数据链路之间的传输。 发送代理和接收代理之间的多重订单关键流可能，并且这些订单关键流中的数据包可以混合进行传输（以及来自其他非订购关键流的数据包）。 数据包通过数据链路传输，使来自同一订单关键流的数据包通过相同的数据链路发送（而来自该订单关键流的数据包在传输链路队列中），并且数据包依次按时间顺序编号 当分组首先被接收到（而不是接收到分组的链路）时，由接收方开始接收并且由接收方重新组合成根据编号顺序的数据分组流，从而保持顺序 的所有订单关键流程。
-
10.发明授权公开(公告)号：US07769046B1
公开(公告)日：2010-08-03
申请号：US11701150
申请日：2007-01-31
申请人： Daniel W. Crocker
发明人： Daniel W. Crocker
IPC分类号： H04J3/24
CPC分类号： H04L12/2801 , H04L45/24 , H04L45/28
摘要： According to specific embodiments of the present invention, a standardized interface is provided for enabling controlled communication between MAC and PHY devices of an access network. In one embodiment, a vendor independent interface is described which may be implemented between a DOCSIS MAC layer and a DOCSIS PHY layer of a DOCSIS enabled data network, in order to enable any DOCSIS MAC and DOCSIS PHY devices (which may be from different vendors) to communicate with each other. Using the standardized interface, component manufacturers are able to combine different MAC and PHY devices from different vendors, thereby facilitating price and value competition between vendors. The standardized interface technique of the present invention may be extensible in ways which allow multiple PHY devices to share the same interface. Further, the interface technique of the present invention may be applied to a variety of different shared-access networks which use at least one shared access communication channel to communicate between a plurality of nodes in the network and a Head End of the network.
摘要翻译： 根据本发明的具体实施例，提供了一种用于实现接入网络的MAC和PHY设备之间的受控通信的标准接口。 在一个实施例中，描述了可以在启用DOCSIS的数据网络的DOCSIS MAC层和DOCSIS PHY层之间实现供应商独立接口，以便能够使得任何DOCSIS MAC和DOCSIS PHY设备（其可能来自不同供应商） 相互沟通。 使用标准化接口，组件制造商能够组合来自不同供应商的不同MAC和PHY设备，从而促进供应商之间的价格和价值竞争。 本发明的标准化接口技术可以以允许多个PHY设备共享相同接口的方式进行扩展。 此外，本发明的接口技术可以应用于使用至少一个共享接入通信信道在网络中的多个节点和网络的头端之间进行通信的各种不同的共享接入网络。
-
-
-
-
-
-
-
-
-
搜索结果
15 条记录 (耗时 0.032 秒)
