公开(公告)号：US06545976B1

公开(公告)日：2003-04-08

申请号：US09159633

申请日：1998-09-24

申请人： Gerald T. Gentile ,  Kenneth T. Myers ,  John S. Datin

发明人： Gerald T. Gentile ,  Kenneth T. Myers ,  John S. Datin

IPC分类号： G01R3108

CPC分类号： H04L1/24 ,  H04J3/14 ,  H04J2203/006 ,  H04J2203/0062 ,  H04L1/22

摘要： This invention precisely and automatically measures the protection switch time of modern communication networks such as the SONET or SDH standard. An automated precision measurement device is provided which uses digital error detection and gated counter techniques to accurately measure the time required for a network element to switch from a defective line to a protected line for the purpose of delivering error free service to customer premises. The device accepts a line side signal, demultiplexes a payload test pattern from the standard mapping, and analyzes the payload pattern for errors. If errors are present, the device further measures the time that the errors persist (e.g., the time between the first error present to the last error present, inclusive). If the measurement was made during a protection switch event in the network element, then this time represents an accurate measurement of the protection switch time that affected the service. Alternatively, the device will measure the signal with embedded test pattern as demultiplexed from the terminal itself yielding a measurement from a customer interface point.

摘要翻译： 本发明精确自动地测量现代通信网络的保护切换时间，如SONET或SDH标准。 提供了一种自动精密测量装置，其使用数字错误检测和门控计数器技术来精确地测量网元从有缺陷的线路切换到受保护线路所需的时间，以便向客户端提供无差错的服务。 该设备接受线路侧信号，从标准映射中解复用有效载荷测试模式，并分析有效负载模式的错误。 如果存在错误，则设备进一步测量错误持续的时间（例如，存在第一个错误与最后一个错误之间的时间，包括端点间的时间）。 如果在网络元件的保护开关事件期间进行了测量，则此时间表示影响服务的保护开关时间的精确测量。 或者，设备将测量具有嵌入式测试模式的信号，从终端本身解复用，从客户接口点产生测量。