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    Data stream filtering apparatus and method
    1.
    发明授权
    Data stream filtering apparatus and method 有权
    数据流过滤装置及方法

    公开(公告)号：US07272137B2

    公开(公告)日：2007-09-18

    申请号：US10107876

    申请日：2002-03-27

    申请人： Brian Unitt ,  Michael Grant ,  David Phillips ,  Matthew Allen

    发明人： Brian Unitt ,  Michael Grant ,  David Phillips ,  Matthew Allen

    IPC分类号： H04L12/56

    CPC分类号： H04L12/1886 ,  H04L12/1836 ,  H04L29/06 ,  H04L69/22

    摘要： A method and apparatus for filtering data packets in a shared-medium or point-to-multipoint communications network. A filter unit is sent a data packet carrying a filter tag value in a packet addressed to the filter unit. The value is stored in the filter unit and subsequently received packets not addressed to the filter unit itself are forwarded only if they carry the stored filter tag. An embodiment of particular interest applies the method to Ethemet frames over a telecommunications access network (including optical or wireless networks), and uses the VLAN tag field to carry the filter tag information.

    摘要翻译： 一种用于在共享介质或点对多点通信网络中过滤数据分组的方法和装置。 向位于过滤器单元的分组中发送一个过滤器单元，该数据包携带过滤器标签值。 该值存储在滤波器单元中，并且随后接收到未被发送到滤波器单元的分组本身，只有当它们携带存储的滤波器标签时才被转发。 特别感兴趣的实施例通过电信接入网络（包括光或无线网络）将该方法应用于Ethemet帧，并且使用VLAN标签字段来携带过滤标签信息。

    High capacity passive optical network
    2.
    发明授权
    High capacity passive optical network 有权
    大容量无源光网络

    公开(公告)号：US07218854B1

    公开(公告)日：2007-05-15

    申请号：US09584330

    申请日：2000-05-30

    申请人： Brian Unitt ,  Michael Grant ,  Jeffrey Farrington ,  David Phillips

    发明人： Brian Unitt ,  Michael Grant ,  Jeffrey Farrington ,  David Phillips

    IPC分类号： H04B10/20

    CPC分类号： H04B10/272

    摘要： A passive optical network suitable for use as a telecommunications access network, having a head-end transmitting in a first optical frequency and one or more subscriber stations transmitting on a second common optical frequency. A carrier sense, multiple access protocol, with collision detection, is used, the collision detection being performed in the subscriber and head-end stations.

    摘要翻译： 一种适合用作电信接入网络的无源光网络，其具有在第一光频率下的头端发射和在第二公共光频率上发射的一个或多个用户台。 使用具有冲突检测的载波侦听，多址协议，在用户和头端站中执行冲突检测。

    Non-return optical star coupler
    3.
    发明授权
    Non-return optical star coupler 失效
    无返回光学星形耦合器

    公开(公告)号：US06915079B1

    公开(公告)日：2005-07-05

    申请号：US09580865

    申请日：2000-05-30

    申请人： Brian Unitt ,  Michael Grant

    发明人： Brian Unitt ,  Michael Grant

    IPC分类号： H04B10/272 ,  H04J14/02 ,  H04J14/08

    CPC分类号： H04B10/272 ,  H04J14/02

    摘要： A passive optical star coupler, and associated method of operation arranged to transmit signals received at any input port to all output ports other than an output port associated with the input port. In this way all received signals are broadcast to all connected network equipment with the exception of the transmitting equipment.

    摘要翻译： 无源光学星形耦合器和相关联的操作方法被布置成将在任何输入端口处接收的信号传输到除了与输入端口相关联的输出端口之外的所有输出端口。 以这种方式，除了发射设备之外，所有接收的信号都被广播到所有连接的网络设备。

    Time slot scheduling for shared-medium communications networks
    5.
    发明授权
    Time slot scheduling for shared-medium communications networks 有权
    共享介质通信网络的时隙调度

    公开(公告)号：US07212540B2

    公开(公告)日：2007-05-01

    申请号：US10109918

    申请日：2002-03-29

    申请人： Brian Unitt ,  Michael Grant

    发明人： Brian Unitt ,  Michael Grant

    IPC分类号： H04J3/06

    CPC分类号： H04L12/2801 ,  H04J3/0682 ,  H04J3/1694

    摘要： A method and apparatus for allocating time slots in a communications network, comprising a headend, a plurality of outstations, and a shared medium connecting each outstation to the headend. The method involves scheduling timeslots for each outstation responsive to the measures of distance of each outstation from the headend. The method reduces the requirement for guard bands between timeslots, since it obviates allocation of a guard band between consecutive first and second timeslots where the outstation allocated the second timeslot is located no closer to the headend than the outstation allocated the first time slot. Ideally, the timeslots are allocated to outstations cyclically in ascending order of distance of the outstations from the headend, with the closest outstation following the farthest to complete the cycle, so that guard bands are rendered unnecessary between the majority of timeslots. In preferred embodiments distance may be round-trip delay, and the outstations and head end may be configured to form a ring network.

    摘要翻译： 一种用于在通信网络中分配时隙的方法和装置，包括头端，多个外站以及将每个外站连接到头端的共享介质。 该方法涉及根据每个外站距离头端的距离的测量来调度每个外站的时隙。 该方法减少了对时隙之间的保护频带的要求，因为它避免了连续的第一和第二时隙之间的保护频带的分配，其中分配的第二时隙的分组位于不比分配了第一时隙的分组更靠近前端。 理想情况下，时间间隔周期性地按照距离头端距离的升序顺序分配给外部站点，最靠近的站点是最远的，以便完成周期，从而在大多数时隙之间使保护频段变得不必要。 在优选实施例中，距离可以是往返延迟，并且外部和头端可以被配置为形成环形网络。

    Multiple access system for communications network
    6.
    发明申请
    Multiple access system for communications network 审中-公开
    用于通信网络的多址系统

    公开(公告)号：US20050163149A1

    公开(公告)日：2005-07-28

    申请号：US11058861

    申请日：2005-02-16

    申请人： Brian Unitt ,  Michael Grant ,  Christopher Tate ,  Andrew Wallace ,  Glen Algie

    发明人： Brian Unitt ,  Michael Grant ,  Christopher Tate ,  Andrew Wallace ,  Glen Algie

    IPC分类号： H04B7/212 ,  H04Q11/00

    CPC分类号： H04Q11/0067 ,  H04Q2011/0064 ,  H04Q2011/0088

    摘要： A communications network (e.g. fibre to the home (FTTH) or wireless) comprises a head end, to which outstations are coupled via a shared point-to-multipoint medium. The head end is arranged to transmit downstream to the outstations a sequence of frames comprising data frames and command frames. The command frames marshal control of upstream transmissions from the outstations. A first downstream command frame directed to a specific outstation indicates the beginning of a timeslot, and also indicates the timeslot duration (including an indefinite duration). Where the duration is indefinite, a second command frame directed to at least the same outstation indicates the end of the allotted time slot. Further methods are provided to optimise timeslot allocation, and to support addition and removal of outstations on the network.

    摘要翻译： 通信网络（例如，到家庭（FTTH）或无线的光纤）包括头端，外部站点经由共享的点对多点介质耦合到该头端。 头端被布置为向下游发送包括数据帧和命令帧的帧序列。 命令框架控制来自外部站点的上行传输。 指向特定外站的第一个下游命令帧指示时隙的开始，并且还指示时隙持续时间（包括不确定的持续时间）。 在持续时间不确定的情况下，指向至少相同外站的第二命令帧指示所分配的时隙的结束。 提供了进一步的方法来优化时隙分配，并支持在网络上添加和删除外站。

    Point to multipoint network
    7.
    发明授权
    Point to multipoint network 有权
    点到多点网络

    公开(公告)号：US07154879B1

    公开(公告)日：2006-12-26

    申请号：US09867175

    申请日：2001-05-29

    申请人： Robert Pfeffer ,  David mann ,  Brian Unitt

    发明人： Robert Pfeffer ,  David mann ,  Brian Unitt

    IPC分类号： H04L12/66

    CPC分类号： H04J3/1694

    摘要： A point-to-multipoint network arrangement, method of operation and related signals for a network comprising a head-end station and at least one subscriber station connected to the head-end by means of a shared medium high-speed point-to-multipoint network (preferably a passive optical network). The method involves transmitting data upstream using a packet-switched transport protocol (e.g. Ethernet) over TDMA. By using high-speed upstream transmission with relatively long time slots and relatively short guard bands, the need for complex ranging schemes is obviated.

    摘要翻译： 一种用于网络的点对多点网络布置，操作方法和相关信号，包括前端站和至少一个与头端连接的用户站，通过共享介质高速点对多点 网络（最好是无源光网络）。 该方法涉及使用分组交换传输协议（例如，以太网）在TDMA上传输数据。 通过使用相对长的时隙和相对较短的保护频带的高速上行传输，避免了对复杂测距方案的需要。