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    • 41. 发明申请
    • Methods, systems, and computer program products for multi-path shortest-path-first computations and distance-based interface selection for VoIP traffic
    • 用于多路径最短路径优先计算的方法,系统和计算机程序产品以及针对VoIP流量的基于距离的接口选择
    • US20070053300A1
    • 2007-03-08
    • US11545788
    • 2006-10-10
    • Rupert ZhuDavid LuSan-qi LiEdward QianYen Shei
    • Rupert ZhuDavid LuSan-qi LiEdward QianYen Shei
    • H04J3/14H04L12/28
    • H04L45/24H04L45/12H04L45/124H04L45/28
    • Methods, systems, and computer program products for multipath Shortest-Path-First (SPF) computations and distance-based interface selection for VoIP traffic are disclosed. According to one method, a multi-path router instance associated with a plurality of network interfaces in a source IP device is provided. A cost is assigned to each of a plurality of internal segments between the multi-path router instance and the network interfaces associated with the multi-path router instance. An aggregate cost is calculated for each of a plurality of traffic paths originating at the multi-path router instance in the source IP device and extending through each of the network interfaces associated with the multi-path router instance to a destination IP device in the network. A list of IP paths is generated, and the paths in the list are ranked based on the calculated cost. Traffic is sent from the source IP device over at least one of the paths in the list. The path costs and rankings are updated in response to segment cost changes.
    • 用于多路径的方法,系统和计算机程序产品公开了针对VoIP业务的最短路径优先(SPF)计算和基于距离的接口选择。 根据一种方法,提供与源IP设备中的多个网络接口相关联的多路径路由器实例。 在多路径路由器实例和与多路径路由器实例相关联的网络接口之间的多个内部段中的每一个分配成本。 为源IP设备中的多路径路由器实例发起的多个业务路径中的每一个计算总成本,并且通过与多路径路由器实例相关联的每个网络接口延伸到网络中的目的地IP设备 。 生成IP路径列表,并根据计算出的成本对列表中的路径进行排名。 通过列表中的至少一个路径从源IP设备发送流量。 路径成本和排名根据分部成本变化进行更新。
    • 44. 发明授权
    • Circuit and method for determining optimal phase combination for startup
of a polyphase DC motor
    • 确定多相直流电机启动的最佳相位组合的电路和方法
    • US5977734A
    • 1999-11-02
    • US150129
    • 1998-09-09
    • Li-Hsin David LuChinh Dac NguyenFrancis Yu
    • Li-Hsin David LuChinh Dac NguyenFrancis Yu
    • H02P6/20H02P7/00H02R39/46
    • H02P6/20
    • A circuit for determining an initial winding combination for motor startup of a polyphase dc motor having a transistor driver circuit comprising a plurality of high side winding drivers and low side winding drivers operably connected to first and second voltage sources comprises a current mirror circuit and a plurality of sense FETs each operably connected between one of the voltage sources and the gate of one of the winding driver transistors in each phase combination. The sense FETs are operably connected to one side of the current mirror circuit. The mirror circuit compares the current through the sense FET with a current threshold provided on the other side of the current mirror and produces an output signal when the threshold is reached. At the same time, the time to reach the threshold is measured and the phase combination having the longest time is stored. Also when the threshold is reached, the sequencer advances to the next phase combination for measurement until all phase combination have been sequenced. The motor is then started with the phase combination having the longest time measurement energized first.
    • 一种用于确定具有晶体管驱动器电路的多相直流电动机的初始绕组组合的电路,该晶体管驱动电路包括可操作地连接到第一和第二电压源的多个高侧绕组驱动器和低侧绕组驱动器,包括电流镜电路和多个 每个相位组合中的每个可操作地连接在一个电压源和一个绕组驱动器晶体管的栅极之间的感测FET。 感测FET可操作地连接到电流镜电路的一侧。 镜像电路将通过感测FET的电流与设置在电流镜的另一侧上的电流阈值进行比较,并在达到阈值时产生输出信号。 同时,测量达到阈值的时间,并存储具有最长时间的相位组合。 此外,当达到阈值时,定序器前进到下一个相位组合进行测量,直到所有相位组合都被排序。 然后,首先通过最长时间测量的相位组合起动电动机。