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    Synchronization of multiple base stations in a wireless communication system
    3.
    发明授权
    Synchronization of multiple base stations in a wireless communication system 失效
    无线通信系统中多个基站的同步

    公开(公告)号：US08005072B2

    公开(公告)日：2011-08-23

    申请号：US11392806

    申请日：2006-03-30

    申请人： Anders Hebsgaard ,  David R. Dworkin ,  Lisa V. Denney ,  Robert J. Lee ,  Thomas J. Quigley

    发明人： Anders Hebsgaard ,  David R. Dworkin ,  Lisa V. Denney ,  Robert J. Lee ,  Thomas J. Quigley

    IPC分类号： H04L12/66

    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。

    Method and apparatus for the reduction of upstream request processing latency in a cable modem termination system
    5.
    发明授权
    Method and apparatus for the reduction of upstream request processing latency in a cable modem termination system 有权
    用于减少有线调制解调器终端系统中的上游请求处理延迟的方法和装置

    公开(公告)号：US07782855B2

    公开(公告)日：2010-08-24

    申请号：US11121116

    申请日：2005-05-04

    申请人： Lisa V. Denney ,  Anders Hebsgaard ,  Robert J. Lee

    发明人： Lisa V. Denney ,  Anders Hebsgaard ,  Robert J. Lee

    IPC分类号： H04L12/28

    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.

    摘要翻译： 上行请求这样的带宽请求由CMTS按优先级顺序处理，以减少响应请求的延迟。 具体来说，电缆调制解调器终端系统（CMTS）由电缆设备连接到多个电缆调制解调器。 CMTS具有适于连接到电缆设备的突发接收器，以处理由电缆调制解调器发送的上行数据分组单元和带宽请求。 每个数据包包括一个能够唯一区分带宽请求与其他数据类型的头。 分组数据单元被布置在第一存储器队列中。 带宽请求被排列在第二个存储器队列中。 由突发接收器处理的分组的报头在到达CMTS时进行检查，以确定分组是分组数据单元还是带宽请求。 分组数据单元被路由到第一个存储器队列。 带宽请求被路由到第二个内存队列。 带宽分配MAP消息是从存储在第二个队列中的带宽请求产生的，并向下游发送到电缆调制解调器。 存储在第一队列中的分组数据单元被耦合到数据输出用于进一步分配。

    Method and apparatus for the reduction of upstream request processing latency in a cable modem termination system
    8.
    发明授权
    Method and apparatus for the reduction of upstream request processing latency in a cable modem termination system 有权
    用于减少有线调制解调器终端系统中的上游请求处理延迟的方法和装置

    公开(公告)号：US06909715B1

    公开(公告)日：2005-06-21

    申请号：US09652718

    申请日：2000-08-31

    申请人： Lisa V. Denney ,  Anders Hebsgaard ,  Robert J. Lee

    发明人： Lisa V. Denney ,  Anders Hebsgaard ,  Robert J. 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.

    摘要翻译： 上行请求这样的带宽请求由CMTS按优先级顺序处理，以减少响应请求的延迟。 具体来说，电缆调制解调器终端系统（CMTS）由电缆设备连接到多个电缆调制解调器。 CMTS具有适于连接到电缆设备的突发接收器，以处理由电缆调制解调器发送的上行数据分组单元和带宽请求。 每个数据包包括一个能够唯一区分带宽请求与其他数据类型的头。 分组数据单元被布置在第一存储器队列中。 带宽请求被排列在第二个存储器队列中。 由突发接收器处理的分组的报头在到达CMTS时进行检查，以确定分组是分组数据单元还是带宽请求。 分组数据单元被路由到第一个存储器队列。 带宽请求被路由到第二个内存队列。 带宽分配MAP消息是从存储在第二个队列中的带宽请求产生的，并向下游发送到电缆调制解调器。 存储在第一队列中的分组数据单元被耦合到数据输出用于进一步分配。