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    • 2. 发明授权
    • Hitless protection switching
    • 无限保护切换
    • US07167442B2
    • 2007-01-23
    • US09862864
    • 2001-05-22
    • John CourtneyDavid M. GoodmanMark Carson
    • John CourtneyDavid M. GoodmanMark Carson
    • H04J3/14H04L12/26G06F11/00
    • H04J14/0283H04J3/062H04J3/14H04J14/0227H04J14/0241H04J2203/006H04J2203/0094H04L1/22
    • The invention provides a method and apparatus for providing hitless protection switching in a synchronous transmission system. A switching apparatus is arranged to receive data signals on at least two transmission paths and to output data from a selected one of said transmission paths. The apparatus is arranged to align the respective received data signals so that a selector mechanism can select between corresponding elements of the received data signals. This arrangement allows hitless switching to be performed since there is no loss or repetition of signal elements when switching occurs. In a preferred embodiment, data in respect of each frame of each data signal is stored and the selector mechanism selects between paths on a frame-by-frame basis by comparing quality information carried by the data signals. This arrangement offers a very low end to end Bit Error Rate (BER) performance.
    • 本发明提供一种用于在同步传输系统中提供无中断保护切换的方法和装置。 交换装置被布置为在至少两个传输路径上接收数据信号并从所选传输路径中选择一个输出数据。 该装置被布置成对齐各个接收的数据信号,使得选择器机构可以在接收到的数据信号的相应元件之间进行选择。 这种布置允许执行无中断切换,因为当发生切换时不存在信号元件的丢失或重复。 在优选实施例中,存储每个数据信号的每个帧的数据,并且选择器机构通过比较由数据信号携带的质量信息逐帧地选择路径之间。 这种布置提供了非常低的端到端误码率(BER)性能。
    • 3. 发明授权
    • Non-blocking high capacity fine grain switch
    • 无阻塞大容量细粒开关
    • US06958995B1
    • 2005-10-25
    • US09754041
    • 2000-12-29
    • David M GoodmanKim B Roberts
    • David M GoodmanKim B Roberts
    • H04L12/28H04L12/50H04L12/56H04Q11/00
    • H04Q11/0005H04L49/15H04L49/357H04Q2011/0016H04Q2011/0075
    • A high capacity switch for switching communications traffic. The high capacity switch has a plurality of differing granularity switching levels, each switching level having at least one switch node capable of performing a switching operation at the granularity of the switching level and at least two primary connections, each connecting one of the switching levels to another one of the switching levels. At one of the switching levels, at least one switch node is capable of switching communications traffic along at least one switch connection path established along one of the primary connections, and is also capable of switching communications traffic along at least one secondary connection to another switch node within the same switching level, such that each of the at least one switch connection paths established is filled to a predetermined level.
    • 用于切换通信流量的高容量交换机。 高容量交换机具有多个不同的粒度切换级别,每个交换级别具有能够以切换级别的粒度执行切换操作的至少一个交换节点和至少两个主要连接,每个连接将一个交换级别连接到 另一个切换级别。 在一个交换级别中,至少一个交换节点能够沿着沿主要连接之一建立的至少一个交换机连接路径来切换通信业务,并且还能够将至少一个辅助连接的通信业务切换到另一个交换机 节点,使得所建立的至少一个交换机连接路径中的每一个被填充到预定的水平。
    • 4. 发明授权
    • Semi transparent tributary for synchronous transmission
    • 半透明支路用于同步传输
    • US06636529B1
    • 2003-10-21
    • US09414367
    • 1999-10-07
    • David M GoodmanJayne BradyChris Murton
    • David M GoodmanJayne BradyChris Murton
    • H04J316
    • H04J3/1617H04J2203/0073H04J2203/0085H04J2203/0094
    • An interface for converting a variety of incoming digital signals into SDH/SONET format for transmission on a synchronous digital network, by identifying the line code of the incoming digital signal, without identifying the information for OSI layer 2 or 3 processing, i.e. format of each packet. Headers are used to encapsulate incoming packets, and enable packets to be discriminated at the receiver. Advantages of performance monitoring capability and transparency are combined. Identifying line codes enables a greater degree of error detection, than a bit based interface. Also synchronisation can be simpler since line codes for padding can be added or deleted more easily than adding or subtracting bits. The interface is semi-transparent in the sense that identification of line codes limits the interface to those formats that use identifiable line codes, but without limiting to a particular OSI layer 2 or 3 frame format.
    • 一种接口,用于通过识别输入数字信号的线路代码,而不用识别OSI第​​2层或第3层处理的信息,即将各种输入数字信号转换成SDH / SONET格式,以便在同步数字网络上进行传输,即每个 包。 头部用于封装输入的数据包,并使接收器能够区分数据包。 性能监控能力和透明度的优势相结合。 识别线路码比基于位的接口能够进行更大程度的错误检测。 同步可以更简单,因为用于填充的行代码可以比添加或减去位更容易地添加或删除。 界面是半透明的,因为线代码的标识将界面限制为使用可识别行代码的格式,但不限于特定的OSI层2或3帧格式。
    • 7. 发明授权
    • Switch subtending in a synchronous transmission system
    • 交换机在同步传输系统中对齐
    • US07013348B1
    • 2006-03-14
    • US10032412
    • 2001-12-21
    • Mark CarsonDavid M. Goodman
    • Mark CarsonDavid M. Goodman
    • G06F15/173
    • G06F15/17375H04J3/0623H04J3/0685H04J3/1611
    • The invention concerns a switching apparatus comprising a low order switch subtended from a high order switch. In order to compensate for delays incurred by passing a data frame through the high order switch to the low order switch and delays incurred by the operation of the low order switch, the apparatus is arranged to advance the payload of a received data frame with respect to the fixed overhead of the data frame by an amount corresponding to the incurred delays. The low order switch uses the advanced payload to create an output frame, for sending to the high order switch, which is advanced with respect to the data frame that it receives. The apparatus, which is particularly suitable for use in SDH and/or SONET systems, obviates the need to provide an alignment apparatus, such as a VT/TU aligner between the high order switch and the subtended low order switch.
    • 本发明涉及一种包括从高阶开关对向的低阶开关的开关装置。 为了补偿通过将数据帧通过高阶开关传递到低阶开关而引起的延迟和由低位开关的操作引起的延迟,该装置被安排为相对于 数据帧的固定开销与发生的延迟相对应。 低阶开关使用高级有效载荷来创建输出帧,用于发送到相对于其接收到的数据帧进行的高阶开关。 特别适用于SDH和/或SONET系统的装置避免了在高阶开关和对向的低阶开关之间提供诸如VT / TU对准器的对准装置的需要。
    • 8. 发明授权
    • Full-resolution beam-index multi-color displays
    • 全分辨率光束折射多色显示器
    • US4306248A
    • 1981-12-15
    • US170727
    • 1980-07-21
    • David M. Goodman
    • David M. Goodman
    • H04N3/22H04N9/24H04N9/31H04N17/00H04N9/16
    • H04N9/24H04N3/22H04N9/31
    • Programmable power supplies are made responsive to beam-index and timing signals in order to automatically control the size and position of the display on a cathode ray tube. The high voltage power supply is also made programmable, responsive to video signal content, to reduce the energy stored in the high voltage circuits. Savings in energy consumption are also obtained by efficiently modulating the target screen of a beam-index type color cathode ray tube. Energy lost at the target screen is less than 10% compared to approximately 70% for a conventional color tube, an improvement factor of 7:1 or more. Taking advantage of the above features, a multi-color display apparatus is disclosed which employs dual excitation of a planar target screen to provide high resolution information in monochrome together with a wide range of colors for enhancement of contrast and for improved information discrimination. Beam-indexing means are used to maintain the registration between the monochrome and color components of the information being displayed.
    • 可编程电源响应于光束指数和定时信号,以便自动控制显示器在阴极射线管上的尺寸和位置。 高电压电源也可编程,响应于视频信号内容,以减少存储在高压电路中的能量。 通过有效地调制光束折射型彩色阴极射线管的目标屏幕也可以节省能量消耗。 在目标屏幕上损失的能量小于10%,而传统彩色管的损耗大约为70%,改进因子为7:1或更高。 利用上述特征,公开了一种多色显示装置,其采用平面目标屏幕的双重激励以提供单色的高分辨率信息以及用于增强对比度和改善信息辨别的宽范围的颜色。 波束索引装置用于维护正在显示的信息的单色和彩色分量之间的配准。