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1. 发明授权

US06760847B1 Method for performing subscriber loop disturber recognition by comparing measured sample power spectral densities with a set of known power spectral densities 失效
标题翻译：通过将测量的样本功率谱密度与已知功率谱密度的集合进行比较来执行用户环路干扰识别的方法
公开(公告)号：US06760847B1
公开(公告)日：2004-07-06
申请号：US09548746
申请日：2000-04-13
申请人： Gin Liu , Liqian Yao , Michael A. Campbell , Gary T. Stone
发明人： Gin Liu , Liqian Yao , Michael A. Campbell , Gary T. Stone
IPC分类号： H04M176
CPC分类号： H04M3/30 , H04L1/0002 , H04L1/20 , H04M3/18 , H04M3/34
摘要： To identify interference from other data carrying subscriber loops (i.e., from loop disturbers), a power spectral density sample may be obtained from the subscriber loop under consideration based on at least one measurement while the loop is not transmitting data. The sample power spectral density may then be correlated with each one of a set of known power spectral densities. Each known power spectral density represents a power spectral density in a loop which is not transmitting data in the presence of one of (i) no subscriber loop disturbers, (ii) a particular subscriber loop disturber, and (iii) particular subscriber loop disturbers. Based on the correlations, subscriber loop disturbers may be recognized.
摘要翻译：为了识别来自携带用户环路（即，环路干扰器）的其他数据的干扰，可以在循环不发送数据的情况下基于至少一次测量从所考虑的用户环路获得功率谱密度样本。然后可以将样本功率谱密度与一组已知功率谱密度中的每一个相关联。每个已知的功率谱密度表示循环中的功率谱密度，其不存在以下（i）没有用户环路干扰器，（ii）特定用户环路干扰器和（iii）特定用户环路干扰器之一）的情况下传输数据。基于相关性，可以识别用户环路干扰器。

2. 发明授权

US06181676B2 System protection switching 失效
标题翻译：系统保护切换
公开(公告)号：US06181676B2
公开(公告)日：2001-01-30
申请号：US09016309
申请日：1998-01-30
申请人： Liqian Yao , Martin d'Anjou
发明人： Liqian Yao , Martin d'Anjou
IPC分类号： G01R3108
CPC分类号： H04L1/0061 , H04B17/40 , H04J1/10 , H04J3/08 , H04J3/1611 , H04L1/203 , H04L1/22
摘要： A radio communication network comprising a plurality of communication terminals and a plurality of repeaters intermediate the communication terminals, with wayside communication paths being established between pairs of the repeaters via two radio channels carrying the same data. Protection switching of a wayside path is determined, in a preferred embodiment, by using one common wayside path to calculate the FEC (Forward Error Correction) and PEC (Parity Error Count). Switching to the better of said two channels is effected if FEC or PEC exceed predetermined thresholds. The common wayside path is defined as follows: (a) &Sgr; wayside A path+&Sgr; wayside B path −&Sgr; (wayside A ||wayside B), if waysides A and B are overlapped (||indicates overlapped portions of the two parameters.) (b) wayside A path OR wayside B path, if waysides A and B are not overlapped. In another embodiment, each wayside tributary's path FEC and PEC is calculated by adding up the main traffic sections FEC and PEC on the wayside path. In yet another embodiment, main traffic section FEC and PEC are used to trigger wayside protection switching. The actual protection switching is performed by hardware in less time than the duration of a wayside data bit.
摘要翻译：一种无线电通信网络，包括多个通信终端和在通信终端之间的多个中继器，通过携带相同数据的两个无线电信道，在中继器对之间建立路边通信路径。在优选实施例中，通过使用一条公共路径来计算FEC（前向纠错）和PEC（奇偶校验错误计数）来确定路旁路径的保护切换。如果FEC或PEC超过预定阈值，则切换到所述两个信道的更好。通常的路径定义如下：（a）SIGMA路旁路径+ SIGMA路边B路径SIGMA（路边A ||路边B），如果路线A和B重叠（||表示两个参数的重叠部分）。）（b）路旁路径或路径B路径，如果路线A和B不重叠。在另一个实施例中，通过在路边路径上相加主要业务部分FEC和PEC来计算每条路边支路的FEC和PEC。在另一个实施例中，主业务部分FEC和PEC用于触发旁路保护倒换。实际的保护切换由硬件在比路边数据位的持续时间少的时间内执行。

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