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11.发明公开METHOD AND APPARATUS FOR DMT CROSSTALK CANCELLATION 审中-公开VERFAHREN UND VORRICHTUNG ZUR DMT-NEBENSPRECHUNTERDRÜCKUNG
公开(公告)号：EP2319191A1
公开(公告)日：2011-05-11
申请号：EP09810359.1
申请日：2009-08-24
发明人： SCHELSTRAETE, Sigurd , HEIDARI, Sam
IPC分类号： H04B1/38
CPC分类号： H04B3/32 , H04L25/03343 , H04L2025/03426 , H04M11/062
摘要： An apparatus for precoding multi-tone modulated transmissions of a plurality of communication channels over bundled subscriber lines. The apparatus includes a pseudo symbol controller and a precoder. The pseudo symbol controller detects a victim communication channel and an interferor communication channel having non- matching symbol rates, and transforms the interferor channel into a pseudo-symbol having both a substantially similar length as a corresponding symbol of the victim channel together with defined tonal characteristics expressed in terms of the interferor channel. The precoder assigns crosstalk coefficients to selected sub-channels or tones of the pseudo symbol and precodes the victim channel with the pseudo symbol using the crosstalk coefficients; thereby generating a precoded victim symbol which exhibits reduced crosstalk between the selected victim and interferor.
摘要翻译： 一种用于通过捆绑用户线路预编码多个通信信道的多音调调制传输的装置。 该装置包括伪符号控制器和预编码器。 伪符号控制器检测受害者通信信道和具有不匹配符号率的干扰信道，并将干扰信道变换成具有与受害信道的相应符号基本相似的长度的伪符号以及定义的音调特征 以干扰信道表示。 预编码器将串扰系数分配给伪符号的选定子信道或音调，并使用串扰系数对伪信号进行预编码; 从而产生预示编码的受害者符号，其在所选择的受害者和干扰者之间表现出减少的串扰。
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公开(公告)号：EP2301216A2
公开(公告)日：2011-03-30
申请号：EP09763478.6
申请日：2009-06-09
CPC分类号： H04B3/32 , H04M3/2209 , H04M3/304 , H04M3/34 , H04M11/062
摘要： A vector DSL system includes a plurality of modems, which may be multi-port devices. Unprocessed user data is extracted from the modems and passed through a private vectoring data routing apparatus to one or more vectoring modules, such as vectoring cards. Each vectoring module includes one or more vector processors that include processing units configured to process the unprocessed user data on the basis of all modems' data for a given DSL tone grouping. Processing of the unprocessed user data removes the effects of FEXT from upstream and downstream user data and returns the processed user data to the modems using the vectoring data routing apparatus, which can be a specialized data transmission network utilizing one or more vector routers.
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13.发明公开Method and apparatus for crosstalk cancellation during SELT testing 审中-公开Verfahren und Vorrichtung zurNebensprechunterdrückungwährendSELT-Prüfungen
公开(公告)号：EP2293535A1
公开(公告)日：2011-03-09
申请号：EP10175848.0
申请日：2010-09-08
CPC分类号： H04M11/062 , H04B3/32 , H04B3/487 , H04M3/304 , H04M3/306 , H04M3/34 , H04M2203/056
摘要： A system for performing a single ended line test (SELT) of a selected subscriber line within a bundle of in-service subscriber lines each supporting frequency division multiplexed multi-tone modulated XDSL communications. The system comprises: a crosstalk cancellation module and a SELT module. The crosstalk cancellation module is coupled to the subscriber lines and configured to cancel crosstalk between the selected subscriber line under test and the in-service subscriber lines. The SELT module couples to the crosstalk cancellation module and is configured to coordinate SELT testing with the crosstalk cancellation module to cancel crosstalk between the selected subscriber line and the in-service subscriber lines during testing.
摘要翻译： 一种用于在支持频分复用多音调调制XDSL通信的一行在用用户线路内执行所选用户线路的单端测试（SELT）的系统。 该系统包括：串扰消除模块和SELT模块。 串扰消除模块耦合到用户线路，并被配置为消除所选择的被测试用户线路与在线用户线路之间的串扰。 SELT模块耦合到串扰消除模块，并配置为与串扰消除模块协调SELT测试，以消除在测试期间所选择的用户线路和在用用户线路之间的串扰。
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公开(公告)号：EP2235860A4
公开(公告)日：2016-04-27
申请号：EP09706027
申请日：2009-01-29
IPC分类号： H04J1/12
CPC分类号： H04M11/062
摘要： A transceiver having shared and discrete components forming a transmit path and a receive path configured to couple to a subscriber line for establishing a communication channel with a remote transceiver. The transceiver comprises a pseudo link manager coupled between the transmit and receive path components to manage pseudo links on the subscriber line prior to entry into a session with the remote transceiver. The pseudo link manager includes: a line monitor and a disruptor. The line monitor monitors the subscriber line, prior to initiating a session, for a received communication signal indicative of a pre-existing session on the remote transceiver. The disruptor transmits a disruptor signal over the subscriber line to the remote transceiver responsive to the detection by the monitor of the received communication signal; thereby disrupting the remote transmitter's pre-existing session and allowing a new session to be established with the remote transceiver.
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15.发明授权METHOD AND SYSTEM FOR VIRTUAL EXCHANGE REFERENCE IMPACT (VERI) FOR USE IN MIXED SPECTRUM MANAGEMENT IN DSL 有权FOR USE IN混合光谱管理DSL方法和系统VERI（虚拟参考Exchange IMPACT）
公开(公告)号：EP1829269B1
公开(公告)日：2013-11-20
申请号：EP05853800.0
申请日：2005-12-13
摘要： A method and apparatus implements a Virtual Exchange Reference Impact (VERI) technique to define a pattern to shape the spectrum of a cabinet deployed system to minimize its impact, e.g., FEXT, into an exchange deployed system while achieving effective cabinet system performance, e.g., in terms of data transmission rate. The invention shapes the cabinet system to replicate a self-impact of the exchange system on itself based on the known distance of the cabinet from the exchange. The shaping is required when both exchange and cabinet systems share the same bundle and exhibit overlapped bandwidths. A particular example consists of VDSL deployed from remote cabinet impacting ADSL2/ADSL2+ deployed from the exchange.
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公开(公告)号：EP2387783A1
公开(公告)日：2011-11-23
申请号：EP10731949.3
申请日：2010-01-05
IPC分类号： G08C15/00
CPC分类号： H04M11/062 , H04L1/0045 , H04L1/009 , H04L1/18
摘要： Included are embodiments for retransmission in a digital subscriber line environment. At least one embodiment of a method includes framing data into transport frames, each transport frame carrying payload data that is viewed differently according to the computing layer in which it is transported; transporting the transport frames over a first computing layer, the payload data of each transport frame corresponding to an integer number Q of elementary cells of the first computing layer, an integer number of header bytes containing information specific to the transport frame, and an integer number of padding bytes; and transporting the transport frames over a second computing layer, the payload data content of each transport frame corresponding to payload data of an integer number M of elementary cells of the second computing layer.
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公开(公告)号：EP2087651A4
公开(公告)日：2011-07-06
申请号：EP07864418
申请日：2007-11-14
发明人： KALUSKAR PRAMOD
IPC分类号： H04L12/26
CPC分类号： H04L12/2881 , H04L47/10 , H04L47/41 , H04M11/062 , Y02D50/30
摘要： A DSL system (200) includes an aggregation device (202) comprising a plurality of ports, a multi-port device (204) comprising a plurality of ports and one or more links (206) that link the plurality of ports of the aggregation device (202) with the plurality of ports of the multi-port device (204). The one or more links (206) are fewer in quantity than the plurality of ports of the aggregation device (202) and fewer in quantity than the plurality of ports of the multi-port device (204). The multi-port device (204) and the aggregation device (202) communicate information in one or both of an autonomous mechanism or a polled mechanism.
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18.发明公开SYSTEMS AND METHODS FOR ADAPTIVE VDSL WITH VARIABLE SAMPLING FREQUENCY AND TIME-DOMAIN EQUALIZER 审中-公开系统VERFAHRENFÜR适应性VDSL MIT VARIABLER ABTASTFREQUENZ UND ZEITBEREICHAUSGLEICHER
公开(公告)号：EP1813047A4
公开(公告)日：2011-06-15
申请号：EP05851856
申请日：2005-11-18
发明人： LANGBERG EHUD , CAI LUJING
CPC分类号： H04L5/1438 , H04B17/0085 , H04L25/03012 , H04L25/03019 , H04L27/2602 , H04L27/2607 , H04L27/2628 , H04L27/265 , H04L2025/03414 , H04L2025/03445 , H04L2025/03585
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公开(公告)号：EP2297912A2
公开(公告)日：2011-03-23
申请号：EP09774358.7
申请日：2009-06-30
IPC分类号： H04L29/02
摘要： A reduced-memory vectored DSL system includes methods and apparatus for reducing the bandwidth and memory storage demands on a vectored DSL system in which FEXT data is transmitted and stored. An upstream-end device such as a DSLAM communicates with a plurality of downstream-end devices such as CPE modems. When test signal data, such as training and/or tracking data, is sent to determine FEXT characteristics of the DSL system, error signals are available for all or substantially all of the upstream and/or downstream frequency band DSL tones used in the system. Dividing a frequency band into sub-bands, only a subset of tones in each sub-band is used for deriving FEXT data, such as a FEXT channel response, FEXT channel coefficients and/or FEXT cancellation coefficients. For tones in the sub-band subsets, full-precision FEXT data values can be derived. For other tones, approximations of the FEXT data can be derived. Alternatively, FEXT data can be defined as a base point and associated differential/incremental values that define full-precision and/or approximation FEXT data with fewer bits by utilizing a Δ value relative to either a sub-band base point or relative to another tone's value. Memory is reduced in both the transmission of such FEXT data (between upstream and downstream ends of the DSL system) as well as within an upstream-end device such as a DSLAM that performs vectoring using a separate or internal vectoring processing apparatus. Memory also is reduced in the storage of such FEXT data in or off of the DSLAM or other upstream-end device.
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