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1.发明公开A METHOD AND A SYSTEM FOR MANAGEMENT OF TRANSMISSION RESOURCES IN DIGITAL COMMUNICATION SYSTEMS 审中-公开方法及系统数字通信系统中管理传输资源
公开(公告)号：EP2366223A1
公开(公告)日：2011-09-21
申请号：EP08875047.6
申请日：2008-11-27
发明人： LINDQVIST, Fredrik , DORTSCHY, Boris , KLAUTAU, Aldebaro , NEIVA DA SILVA FONSECA LINDQVIST, Maria , PELAES, Evaldo Goncalves
CPC分类号： H04B3/32 , H04L5/003 , H04L25/0204 , H04L27/2601
摘要： The present invention relates to a method for managing transmission resources in a digital communication system comprising an access network, such as a DSL system, implementing resource management for minimization of cross-talk interference in a cable or cable binder of the access network comprising a number, N of lines. It comprises the steps of : determining, by means of calculating means (4o), for a respective of said lines (1;2), a relevant line set, comprising interference relevant lines, for said respective line (1;2), and applying, for the respective line, an algorithm for resource management using the determined relevant line set, thus reducing computational complexity of the resource management algorithm.
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公开(公告)号：EP2697909B1
公开(公告)日：2015-08-12
申请号：EP11714494.9
申请日：2011-04-12
发明人： LINS de MEDEIROS, Eduardo , DORTSCHY, Boris , KLAUTAU, Aldebaro , MONTEIRO, Marcio Murilo Conte
CPC分类号： H04B3/32 , H04L5/0046 , H04L5/006
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公开(公告)号：EP2319233A1
公开(公告)日：2011-05-11
申请号：EP08803299.0
申请日：2008-08-28
发明人： ERICSON, Klas , COSTA, João, C., Weil, Albuquerque , KLAUTAU, Aldebaro , RODRIGUES, Roberto, Menezes
IPC分类号： H04M3/30
摘要： The present invention relates to a method and an arrangement based on two-port network (TPN) theory that allows analytically estimating the loop transfer function from open and short-circuited input impedance measurements, e.g. single ended line transmission (SELT) measurements, by utilizing the fact that the line under test (LUT) can be considered reciprocal and by assuming that the LUT is symmetric. Hence, by using the present invention and an estimation of the noise on the line, the attainable bit rate at the customer premises can be determined by means of SELT measurements at the CO. The transfer function of a telephone copper-loop is estimated regardless of its topology by impedance measurements from the CO side. Specifically, such estimation is carried out from the calculation of the transmission parameters of loop, which are expressed only in terms of open and short-circuited input impedance measurements at the CO when reciprocity and symmetry is assumed.
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公开(公告)号：EP2697909A1
公开(公告)日：2014-02-19
申请号：EP11714494.9
申请日：2011-04-12
发明人： LINS de MEDEIROS, Eduardo , DORTSCHY, Boris , KLAUTAU, Aldebaro , MONTEIRO, Marcio Murilo Conte
CPC分类号： H04B3/32 , H04L5/0046 , H04L5/006
摘要： A method and arrangement is proposed for adaptively generating a target noise margin for use on a DSL transmission line. The method includes determining a first quantity representing a current noise power on the line using line parameter data relating to the transmission performance of the line, determining a second quantity representing a worst-case noise power on said line using previously obtained values of the line parameter data, calculating the difference between the first and second quantities to generate a difference value, setting a target noise margin as at least equal to said difference value, and providing the target noise margin for use on the line upon initialisation of the line. In a preferred embodiment, the line parameter data is the bit loading on the line and the first and second quantities are values of the average signal- to-noise ratio on the line derived from the bit loading data.
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