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1. 发明授权

US06711136B1 Code-based filtering mechanism for reducing data-induced latching loopback in digital data service device 有权
标题翻译：基于代码的滤波机制，用于减少数字数据服务器件中的数据触发闭环回路
公开(公告)号：US06711136B1
公开(公告)日：2004-03-23
申请号：US09336873
申请日：1999-06-18
申请人： Kevin W. Schneider , Don A. Waring
发明人： Kevin W. Schneider , Don A. Waring
IPC分类号： G01R3108
CPC分类号： H04L43/00
摘要： To reduce the possibility of a data-induced latching loopback, a digital data services device integrates one or more digital control code-based filtering routines into a test code sequence-based latching loopback scheme. The filtering routines include a ‘garbage’ byte detection routine, a ‘protected loopback’ routine, and a ‘preamble’ routine. The ‘garbage’ byte detection routine is an intra-loopback establishment filtering routine that limits the type of customer data that may be received between sequences of repeated control bytes of a valid latching loopback sequence. The ‘protected loopback’ routine is a flag byte-based filtering routine for frame relay data, which controllably disables latching loopback for a prescribed period of time, whenever a predetermined character associated with frame relay customer data is detected. The ‘preamble’ routine is a repeated code based-mechanism that allows the timeout invoked in the frame relay protected loopback routine to be controllably terminated, so that latching loopback may be immediately re-enabled.
摘要翻译：为了减少数据诱发的闭锁环回的可能性，数字数据服务设备将一个或多个基于数字控制码的滤波例程集成到基于测试码序列的锁存环回方案中。过滤例程包括“垃圾”字节检测程序，“保护环回”例程和“前导码”例程。 “垃圾”字节检测程序是环回设置过滤程序，其限制可以在有效锁存环回序列的重复控制字节的序列之间接收的客户数据的类型。 “受保护的环回”例程是用于帧中继数据的基于标志字节的过滤例程，每当检测到与帧中继客户数据相关联的预定字符时，其可控地禁用锁定环回规定的时间段。 “前导码”例程是重复的基于代码的机制，其允许在帧中继受保护的环回例程中调用的超时被可控地终止，使得可以立即重新启用锁存环回。

2. 发明授权

US5450441A Mechanism for monitoring quality of digital telephone link based upon rate of occurrence of illegal bipolar violations 失效
标题翻译：基于非法双性违规发生率监测数字电话链路质量的机制
公开(公告)号：US5450441A
公开(公告)日：1995-09-12
申请号：US168075
申请日：1993-12-14
申请人： Norman R. Harris , Don A. Waring , Clint S. Coleman
发明人： Norman R. Harris , Don A. Waring , Clint S. Coleman
IPC分类号： H04L1/20 , H04B3/46 , H04B17/00
CPC分类号： H04L1/20
摘要： To prevent the occurrence of an anomaly on a single data-sourcing slave channel from causing continuous transmission on that channel and thereby tying up the entirety of a multipoint network, a signal transmission quality monitoring mechanism is incorporated into the office channel unit of each data-sourcing channel. The signal transmission quality monitoring mechanism controls the participation of each monitored digital communications channel on the basis of a measure of the quality of digital signals received from each monitored channel. The control software of each slave channel's office channel unit is configured to include a bipolar violation detector which monitors the channel for the presence of errors exhibited as bipolar violations of alternate mark inversion (AMI)-formatted digital signals. In response to the occurrence of a prescribed number of illegal bipolar violations within a predetermined number of received signals (e.g. three errored seconds within a sliding ten second window), the channel is declared to be of "BAD" quality, and the office channel unit sends an `ABNORMAL` station code upstream to a multipoint junction unit. Thereafter, during continued monitoring of the channel, in response to the lapse of a predetermined period of time (e.g. 30 seconds) during which the prescribed number of illegal bipolar violations has not occurred within the predetermined number of received digital signals, the channel is declared to be "GOOD", so that participation of the channel for the transmission of digital signals to the master site may be resumed.
摘要翻译：为了防止单个数据源从属信道上的异常发生导致该信道上的连续发送，从而捆绑多点网络的整体，信号传输质量监控机制被并入到每个数据源的从属信道的办公信道单元中，采购渠道。信号传输质量监控机制基于从每个被监控的信道接收的数字信号的质量的量度来控制每个被监视的数字通信信道的参与。每个从属通道的办公室通道单元的控制软件被配置为包括双极违规检测器，该检测器监视通道是否存在作为双极违反交替标记反转（AMI）格式的数字信号的错误。响应于在预定数量的接收信号（例如滑动十秒窗口内的三个错误的秒）内出现规定数量的非法双极违例，信道被宣布为“BAD”质量，并且办公室信道单元将“异常”站代码上行发送到多点连接单元。此后，在继续监视信道期间，响应于在预定数量的接收到的数字信号中未发生规定数目的非法双极违例的预定时间段（例如30秒），声明信道为“良好”，从而可以恢复用于向主站点发送数字信号的信道的参与。

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