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    Method and apparatus for the reduction of upstream request processing latency in a cable modem termination system
    21.
    发明申请
    Method and apparatus for the reduction of upstream request processing latency in a cable modem termination system 有权

    公开(公告)号：US20050190696A1

    公开(公告)日：2005-09-01

    申请号：US11121116

    申请日：2005-05-04

    申请人： Lisa Denney ,  Anders Hebsgaard ,  Robert Lee

    发明人： Lisa Denney ,  Anders Hebsgaard ,  Robert Lee

    IPC分类号： H04L12/28 ,  H04L12/56

    CPC分类号： H04L47/2441 ,  H04L12/2801 ,  H04L12/66 ,  H04L47/15 ,  H04L47/35 ,  H04L47/70 ,  H04L47/788 ,  H04L47/821

    摘要： Upstream requests such a bandwidth requests, are processed by CMTS out of order on a priority basis to reduce latency in responding to the request. Specifically, a cable modem termination system (CMTS) is connected to a plurality of cable modems by a cable plant. The CMTS has a burst receiver adapted to be connected to the cable plant to process upstream data packet units and bandwidth requests transmitted by the cable modems. Each packet includes a header that uniquely distinguishes the bandwidth requests from other data types. Packet data units are arranged in a first memory queue. Bandwidth requests are arranged in a second memory queue. The headers of the packets processed by the burst receiver are inspected as they arrive at the CMTS to determine if the packets are packet data units or bandwidth requests. Packet data units are routed to the first memory queue. Bandwidth requests are routed to the second memory queue. Bandwidth allocation MAP messages are generated from the bandwidth requests stored in the second queue and transmitted downstream to the cable modems. The packet data units stored in the first queue are coupled to a data output for further distribution.

    Method and system for flexible channel association
    22.
    发明授权
    Method and system for flexible channel association 有权
    灵活通道关联的方法和系统

    公开(公告)号：US07426744B2

    公开(公告)日：2008-09-16

    申请号：US09963671

    申请日：2001-09-27

    申请人： Lisa Denney ,  Gerald Grand ,  Yushan Lu

    发明人： Lisa Denney ,  Gerald Grand ,  Yushan Lu

    IPC分类号： H04N7/173 ,  H04L12/28

    CPC分类号： H04L47/10 ,  H04L12/2801 ,  H04L45/245 ,  H04L63/0236 ,  H04L63/10 ,  H04L63/126 ,  H04W72/042

    摘要： A supervisory communications device, such as a headend device within a cable communications network, monitors and controls communications with a plurality of remote communications devices, such as cable modems, throughout a widely distributed network. The supervisory device allocates bandwidth on the upstream channels by sending MAP messages over its downstream channel. A master-slave interface permits a second supervisory device to be connected to increase the number of available upstream channels. When one device operates as the slave device to the other, the slave device is programmable to select MAP messages from either of the master device or the slave device. A primary filter and a slave filter are provided to specify which downstream channel(s) has the authority to issue MAP messages for each available upstream channel. The filters utilizes registers to authenticate the source of the MAP messages. If properly authenticated, the MAP messages are forwarded to a parse processor to format the MAP messages, and send the MAP messages to a MAP FIFO to associate the upstream channel(s) with the appropriate source downstream channel.

    摘要翻译： 诸如电缆通信网络中的前端设备的监控通信设备在整个广泛分布的网络中监视和控制与多个远程通信设备（例如电缆调制解调器）的通信。 监控设备通过在其下行信道上发送MAP消息来在上行信道上分配带宽。 主从接口允许连接第二监控​​设备以增加可用上行信道的数量。 当一个设备作为从设备作为另一个设备时，从设备可编程为从主设备或从设备中的任一个选择MAP消息。 提供主滤波器和从属滤波器以指定哪个下行信道具有为每个可用上行信道发布MAP消息的权限。 这些过滤器利用寄存器来验证MAP消息的源。 如果正确认证，则MAP消息被转发到解析处理器以格式化MAP消息，并将MAP消息发送到MAP FIFO以将上行信道与适当的源下行信道相关联。

    Hardware filtering of unsolicited grant service extended headers
    23.
    发明授权
    Hardware filtering of unsolicited grant service extended headers 失效
    硬件过滤未经请求的授权服务扩展头

    公开(公告)号：US07379472B2

    公开(公告)日：2008-05-27

    申请号：US10252420

    申请日：2002-09-24

    申请人： Niki Pantelias ,  Kenneth G Zaleski, II ,  Gale Shallow ,  Lisa Denney

    发明人： Niki Pantelias ,  Kenneth G Zaleski, II ,  Gale Shallow ,  Lisa Denney

    IPC分类号： H04B7/212 ,  H04J3/16 ,  H04L12/56

    CPC分类号： H04L12/2801 ,  H04L69/12 ,  H04L69/22

    摘要： A system and method is presented to utilize hardware instead of software to compare for bandwidth request changes between two consecutively received unsolicited grant service (UGS) extended headers for the same service identifier (SID), obtains significant savings in CPU cycles for the CMTS software. The system determines whether adequate bandwidth is being provided from a cable modem termination system to a data provider during a unsolicited grant service flow. The system includes a means for receiving a current voice packet in the unsolicited grant service flow at the cable modem termination system from the data provider, where the current voice packet comprises a unsolicited grant service extended header. The system further includes means for comparing the current unsolicited grant service extended header with a previous unsolicited grant service extended header. If the current and previous unsolicited grant service extended headers differ, then means for indicating to the software of the CMTS that the bandwidth being provided to the cable modem needs adjusted (either increased or decreased) for the unsolicited grant service flow.

    摘要翻译： 提出了一种系统和方法来利用硬件而不是软件来比较两个连续接收的用于相同服务标识符（SID）的不请自来的授权服务（UGS）扩展头部之间的带宽请求变化，从而大大节省了CMTS软件的CPU周期。 系统确定在非请求授权服务流程期间是否从电缆调制解调器终端系统向数据提供者提供足够的带宽。 该系统包括用于在数据提供商的电缆调制解调器终端系统处的未经请求的授权服务流中接收当前语音分组的装置，其中当前语音分组包括非请求授权服务扩展报头。 该系统还包括用于将当前未经请求的授权服务扩展报头与先前的未经请求的授权服务扩展报头进行比较的装置。 如果当前和以前的未经请求的授权服务扩展头部不同，则指示CMTS的软件指示提供给电缆调制解调器的带宽需要为非请求的授权服务流程进行调整（增加或减少）。

    Method and apparatus for the synchronization of multiple cable modern termination system devices
    26.
    发明申请
    Method and apparatus for the synchronization of multiple cable modern termination system devices 失效
    多电缆现代终端系统设备同步的方法和装置

    公开(公告)号：US20060182148A1

    公开(公告)日：2006-08-17

    申请号：US11392806

    申请日：2006-03-30

    申请人： Anders Hebsgaard ,  David Dworkin ,  Lisa Denney ,  Robert Lee ,  Thomas Quigley

    发明人： Anders Hebsgaard ,  David Dworkin ,  Lisa Denney ,  Robert Lee ,  Thomas Quigley

    IPC分类号： H04J3/06

    CPC分类号： H04L25/03343 ,  H04B1/1036 ,  H04J3/0664 ,  H04J3/067 ,  H04J3/0682 ,  H04L12/2801 ,  H04L2025/03808

    摘要： A plurality of CMTS devices are linked together and synchronized to facilitate communication between the respective CMTS devices and respective downstream cable modems. According to one embodiment of the invention, one of the CMTS devices is designated as a master device, and the other CMTS devices are designated as slave devices. The respective CMTS devices are connected to each other by means of a synchronization bus. The master CMTS device then generates and broadcasts a future time stamp value, which is received by the respective slave CMTS devices. When the time stamp counter in the master CMTS device reaches the transmitted value, a control signal is broadcast over the synchronization bus. The slave CMTS devices then retrieve the time stamp value and reset their respective local time stamp counters to the received value. In this manner, the CMTS devices are synchronized.

    摘要翻译： 多个CMTS设备被链接在一起并被同步以促进各个CMTS设备和相应的下游电缆调制解调器之间的通信。 根据本发明的一个实施例，CMTS设备中的一个被指定为主设备，并且其他CMTS设备被指定为从设备。 相应的CMTS设备通过同步总线相互连接。 然后，主CMTS设备生成并广播由相应从属CMTS设备接收的将来的时间戳值。 当主CMTS设备中的时间戳计数器达到发送值时，通过同步总线广播控制信号。 从属CMTS设备然后检索时间戳值并将其各自的本地时间戳计数器重置为接收的值。 以这种方式，CMTS设备被同步。

    System and method for the synchronization and distribution of telephony timing information in a cable modem network
    29.
    发明申请
    System and method for the synchronization and distribution of telephony timing information in a cable modem network 有权
    用于在电缆调制解调器网络中同步和分发电话定时信息的系统和方法

    公开(公告)号：US20050053098A1

    公开(公告)日：2005-03-10

    申请号：US10967852

    申请日：2004-10-18

    申请人： Theodore Rabenko ,  Lisa Denney

    发明人： Theodore Rabenko ,  Lisa Denney

    IPC分类号： H04J3/06 ,  H04M11/00

    CPC分类号： H04J3/0664 ,  H04J3/0644 ,  H04J3/0673

    摘要： A method for synchronizing clocks in a packet transport network. The method comprises, receiving an external network clock at a central packet network node and transmitting timing information to a plurality of packet network devices, the timing information based upon the external network clock. The method further comprises, transmitting and receiving data that is synchronized to the timing information to a plurality of connected packet network devices. And finally, delivery of packets to an external interface via a packet network that contains data synchronized to the external network clock.

    摘要翻译： 一种用于在分组传输网络中同步时钟的方法。 该方法包括：在中央分组网络节点处接收外部网络时钟，并将定时信息发送给多个分组网络设备，基于外部网络时钟的定时信息。 该方法还包括：向多个连接的分组网络设备发送和接收与定时信息同步的数据。 最后，通过包含与外部网络时钟同步的数据的分组网络将数据包传送到外部接口。