WO2002100008A1 - Dynamic digital communication system control - Google Patents
Dynamic digital communication system control Download PDFInfo
- Publication number
- WO2002100008A1 WO2002100008A1 PCT/US2002/017117 US0217117W WO02100008A1 WO 2002100008 A1 WO2002100008 A1 WO 2002100008A1 US 0217117 W US0217117 W US 0217117W WO 02100008 A1 WO02100008 A1 WO 02100008A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- user
- signals
- power
- interference
- data rate
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/32—Reducing cross-talk, e.g. by compensating
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1081—Reduction of multipath noise
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B15/00—Suppression or limitation of noise or interference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
- H04B3/462—Testing group delay or phase shift, e.g. timing jitter
- H04B3/466—Testing attenuation in combination with at least one of group delay and phase shift
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/46—Monitoring; Testing
- H04B3/487—Testing crosstalk effects
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0037—Inter-user or inter-terminal allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
- H04L5/0046—Determination of how many bits are transmitted on different sub-channels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0016—Arrangements for synchronising receiver with transmitter correction of synchronization errors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
- H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
- H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
- H04B2001/1045—Adjacent-channel interference
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
Definitions
- Unbundling involves the incumbent local exchange carrier's (ILEC's) lease of a telephone line or some part of its bandwidth to a competitive local exchange carrier (CLEC).
- Current unbundling practice with DSL service usually allows the CLEC to place modulated signals directly on leased physical copper-pair phone lines, sometimes referred to as the lease of "dark copper.”
- Such unbundled signals may provide services, and consequently use spectra, that differ among the various service providers. The difference in spectra can aggravate crosstalking incompatibilities caused by electromagnetic leakage between lines existing in close proximity.
- ILECs and CLECs try to ensure mutual spectral compatibility by standardizing the frequency bands and the power spectral densities that can be used by various DSL services.
- DSL spectrum management attempts to define the spectra of various DSL services in order to limit the crosstalk between DSLs that may be deployed in the same binder. Such crosstalk can be the limiting factor in determining the data rates and symmetries of offered DSL services at various loop reaches, so spectrum management finds some level of compromise between the various DSL service offerings that may be simultaneously deployed. Spectrum management studies tend to specify some typical and worst-case loop situations, and then proceed to define fixed spectra for each type of DSL to reduce the mutual degradation between services. Such a fixed spectrum assignment may not produce the desired level of compromise in situations different from those presumed in the studies.
- communication parameters at the physical layer are determined based on static information about a pair of modems and their twisted pair line.
- an existing system 300 has modem pairs 310, 311 connected by twisted pair lines 312.
- Standardized requirements and constraints 314 for each link are provided to communication adaptation modules 315.
- measured line and signal characteristics of a line 312 can be fed back to the communication adaptation module 315 by a module 316 for a given line to assist in operation of the modem pairs 310, 311 corresponding to the line 312.
- DSL modems use frequencies above the traditional voice band to carry highspeed data.
- DSL transmission uses Discrete Multitone (DMT) modulation, which divides the frequency band into a large number of sub-channels and lets each sub-channel carry a separate data stream.
- DMT modulation allows implementation of arbitrary power allocation in each frequency tone, allowing spectral shaping.
- each user also is subject to a static power spectrum density (PSD) constraint.
- PSD power spectrum density
- the power spectrum density constraint limits the worst- case interference level from any modem; thus, each modem can be designed to withstand the worst-case noise.
- Such a design is conservative in the sense that realistic deployment scenarios often have interference levels much lower than the worst-case noise, and current systems are not designed to take advantage of this fact.
- the same power spectrum density constraint is applied to all modems uniformly regardless of their geographic location.
- ADSL Asymmetric DSL
- VDSL VDSL
- VDSL aims to deliver asymmetric service with downstream rates up to 52 Mbps, and symmetric service with rates up to 13 Mbps.
- DSL communication is still far from reaching its full potential, and the gradual "shortening" of loops presents an opportunity to develop advanced methods that can achieve improved rates and performance.
- LT line termination
- NT network termination
- an ILEC may only provide what is essentially packet unbundling at the LT terminal (that is, service bandwidth leased at a layer 2 or 3 protocol level, not at the physical layer). This represents a change in the architecture presumed in many spectrum studies.
- a digital communication system has a number of communication lines, each of the lines being used by a user, where the total power a user can use in the system is limited by a power constraint.
- a method of controlling system operation includes assigning the total power constraint for each user an initial value and then determining a competitively optimal data rate for each user.
- the competitively optimal data rate is ascertained by determining a power allocation within the user's total power constraint as a result of iteratively allowing each user to optimize its power allocation.
- the competitively optimal data rate for a user is based on the power allocation arrived at by that user and is evaluated by comparing the competitively optimal data rate with a target rate for the user.
- Figure 6 is a schematic representation of a DSL system showing a bundle of transmission lines in a binder wherein some of the lines share a fiber or other link between a CO and an ONU.
- Figure 10 shows FEXT coupling measurements for loops with length of 1640 feet.
- Performance of the system may be measured by maximizing data rates to users.
- operators may wish to be able to offer a variety of services to users. For example, if an operator knows all of the available rates for a bundle, that operator may be able to offer certain users higher data rates as a "premium" service or for specialized needs (such as a hospital or emergency care provider).
- premium a service or for specialized needs (such as a hospital or emergency care provider).
- terms such as “optimal” and “optimization” therefore may be subjectively defined and may not necessarily refer to the fastest data rate(s), per se.
- the digital subscriber line (DSL) environment can be viewed as a multi-user system.
- One embodiment of the present invention is intended to optimize power allocation to identify the maximum achievable data rates for multiple DSL modems in the presence of mutual interference.
- the following discussion will use VDSL as an example, and show that a multi-user system design with an advanced power allocation scheme can provide a system with substantial performance improvement as compared to a single-user design that does not take the multi-user aspect into account.
- This advanced power allocation method can be implemented either in a centralized fashion or a distributed fashion.
- the centralized approach assumes the existence of an entity which acquires knowledge of channel and crosstalk coupling functions, determines the desired signaling characteristics and parameters for each user, and finally instructs each user to employ these transmission characteristics and parameters.
- Another embodiment does not require knowledge of the crosstalk coupling functions.
- the modems of each user enter a phase during which each user individually adjusts its own signaling characteristics with the aim of attaining its own desired performance level, while minimizing the crosstalk it induces on the other users.
- a centralized entity may still exist, but its role may be restricted to setting the target performance levels of each user.
- each receiver also sees a background noise whose power spectrum density is denoted as ⁇ l (f) .
- the power allocation for each transmitter is denoted as P,(f) , which must satisfy a power constraint:
- the obj ective of the system design is to maximize the set of rates ⁇ R ⁇ , ... , R N j subject to the power constraints of Equation (1). It will be apparent to those of skill in the art that, for each transmitter, increasing its power at any frequency band will increase its own data rate. However, such an increase also causes more interference to other users and is therefore detrimental to other users' transmissions. Thus, an optimization or other advanced design must consider the trade-off among the data rates of all users.
- the method of the present invention offers the loops an opportunity to negotiate the best use of power and frequency with each other.
- the usual PSD constraint which is in place for the purpose of controlling interference, is no longer needed. Only total power constraints apply.
- the proposed method does not involve arbitrary decisions on the reference noise or reference length.
- Nash equilibrium is defined as a strategy profile in which each player's strategy is an optimal response to each other player's strategy. The following discussion will characterize the Nash equilibrium in the Gaussian interference chamiel game, and determine its existence and uniqueness in realistic channels.
- a two-user interference channel provides the following simplified model:
- the goal is to achieve certain target rates for each user.
- the adaptive process runs in two stages.
- the inner stage uses given power constraints for each user as the input and derives the competitive optimal power allocation and data rates as output. This is accomplished by the iterative water-filling procedure.
- the first user updates its power allocation as the water- filling spectrum of its channel regarding all other users' crosstalk as noise. Water- filling is then applied successively to the second user, the third user, and so forth, then again to the first user, second user, etc., until each user's power allocation converges.
- Alternative (or even random) orderings also will work, provided that all users are "served" in due course.
- rate maximization criterion can be replaced by a margin maximization criterion, where the target data rates are fixed for each user.
- the block _P V contains all zeros, except for a one at position (/ ' ,/).
- Figure 10 shows FEXT coupling measurements for loops with length of 1640 feet. Since only magnitude data is provided, linear phase was assumed in order to derive the impulse responses. It was found that 99.9% of the signal energy is contained within 9 ⁇ sec. With a DMT block size of 4096 samples and sampling rate of 17.664 MHz, this corresponds to 159 samples. Therefore, a CP length of 320 samples (corresponding to a 7.8% loss) is more than adequate.
- Equation (22) the methods to remove crosstalk within each tone are described first for upstream and then for downstream communication.
- the matrices T and T dmm are assumed to be non-singular (the justification for this assumption and the consequences of ill-conditioning are discussed below).
- Equation (22) Equation (22)
- N ⁇ 2 * N, has an identity covariance matrix. Since R, is upper triangular and
- N has uncorrelated components
- the input U can be recovered by back-substitution combined with symbol-by-symbol detection.
- a decision feedback structure 1100 is created with the feedforward matrix module 1110 using
- T is defined as:
- the preferred MIMO precoder described above corresponds to a single tone and is shown in Figure 13.
- Figure 13 Combining the precoders of all tones and including the DMT transmitters and receivers, the vectored DMT system for downstream transmission is shown in Figure 14.
- This system resembles the system of Figure 12, except that signals are "pre-processed" with precoders 1420-1 through 1420-L before being sent by the system transmitters 1410-1 tlirough 1410-L, respectively.
- Equations (23) and (27) give the QR decomposition of the same matrix.
- the diagonal element of a column of T is larger in magnitude than the off-diagonal elements of the same column. This occurs because, in upstream transmission, the crosstalk coupled signal originating from a specific transmitter can never exceed the "directly" received signal of the same transmitter, and typically the magnitude difference is more than 20 dB.
- the insertion loss of a signal is always smaller than the coupling loss that it experiences when it propagates into a neighboring pair.
- the computational cost incurred by the QR cancellation is decomposed into the cost of the QR decompositions and the cost associated with signal processing.
- DSL channels are stationary, so the QR decompositions need to be computed infrequently (preferably during initialization).
- the number of flops per tone can be greatly reduced by taking advantage of the crosstalk environment characteristics. It is known that the crosstalk noise in a pair originates mostly from just three or four neighboring pairs, which implies that a typical 7 matrix is almost sparse with only tliree or four relatively large off-diagonal elements per row. Therefore, approximating 7 as a sparse matrix, Givens rotations can be employed to triangularize T t with a reduced number of flops.
- the real-time computational burden due to the canceller and precoder blocks cannot be reduced. In a straightforward implementation, the operations dominating the total cost are those of Equations (24) and (28).
- the upstream channel matrix for a given tone can be estimated, including a channel estimation error. Then, the QR decomposition with the reciprocity assumption can be performed to get the QR factor estimates. Starting from Equation (24), the effect on upstream communication can be computed. Doing this, it is found that the estimation errors impact transmission by introducing a "bias" in the detection and also by permitting some residual crosstalk. A similar analysis can be applied for downstream communication, but modulo arithmetic complicates the expressions. Ignoring the modulo operations, the effects of the estimation errors can be separated into a detection bias term and a residual crosstalk term.
- Transmission optimization as used in the following example will refer to maximization of a weighted data rate sum. However, in the broadest sense of the present invention, the term “optimization” is not so limited. Optimization may also mean determining the maximum rates available and allocating or provisioning available resources (including data rates for various users) within a digital communication system.
- T is defined as the transmission gap, and depends on the probability of error requirement, the coding gain and the required margin.
- N ⁇ p and N down are the sets of upstream and downstream tone indices correspondingly, which depend on the FDD plan. Error propagation effects are generally limited since DSL systems operate at very small probabilities of error.
- the parameters with respect to which optimization takes place are ⁇ [ ⁇ for upstream transmission and ⁇ k ' down for downstream transmission. These parameters are constrained by limits on the transmitted energy. In upstream transmission, the total transmit energy is constrained by:
- Equation (38) for downstream becomes:
- Equation (33) becomes independent for each user, and thus the a t weights are irrelevant in this scenario.
- the optimization problem for each transmission direction is broken into k waterfilling problems expressed by:
- Vectoring combined with full channel matrix knowledge can prove effective in limiting the crosstalk induced by vectored systems, without resorting to the introduction of a universal PSD mask, or the use of power back-off methods (which do not necessarily take into account knowledge about crosstalk coupling resulting from matrix channel identification).
- Equation (22) can be augmented to include the received samples of alien systems: Eq. (44)
- n , U réelle , and N ⁇ are vectors of the received samples, of the transmitted symbols and of the noise samples, respectively, of the alien systems.
- the definitions of the block matrices C, C n and T Formula depend on both the channel and the characteristics of the alien DSL systems; and, although T is block diagonal, this property will not generally hold for the other matrices.
- Equation (33) M is the number of neighboring systems
- N N is the number of "dimensions" (for example, the number of tones) per neighboring system
- ⁇ , ⁇ j c down are the maximum allowable crosstalk energies in sample j of the neighboring systems for upstream and downstream
- c Jt ⁇ is the (/,/) element of the MN x EN matrix C .
- a dynamically configured band plan may offer significant advantages. Such a plan is common for all users, but is determined during modem initialization, depending on the specific transmission environment, as well as user requirements.
- Equations (34) and (35) are used, the partition of the set of tones into N up and N down is a binary constrained problem, whose solution has very high complexity.
- the objective has been the maximization of a weighted data rate sum. It will be apparent to one of ordinary skill, however, that by adjusting the weights, different surface points of the data rate region achievable by vectored transmission can be determined, and thus the whole multi-dimensional surface can be determined as well. However, visualizing the inherent tradeoffs becomes difficult when the weighted sums include more than three terms.
- One practical question that can be posed to a service provider is whether a given vectored system can support a set of rate requirements and, if so, what energy allocation is required for achieving the requirements. This problem actually has a duality relationship with the weighted data rate sum problem, and thus the weighted sum problem provides an alternative method to solve the "feasibility" problem.
- VDMT Vectoring without power back-off or frequency planning can improve performance significantly in several respects.
- VDMT allows the achievement of much higher data rates. These rate increases are considerable for lengths in the range of 3500-4500 feet or less. The gains can be even greater in short loops, where transmission is obviously FEXT-limited.
- vectored DMT can extend the maximum loop length given a data rate requirement. For example, a downstream rate requirement of 50 Mbps typically limits a standard DMT system to loop lengths shorter than 1150 feet. Use of the present invention can extend the reach to lengths on the order of 2650 feet and possibly longer.
- embodiments of the present invention employ various processes involving data transferred through one or more computer systems and/or modems.
- Embodiments of the present invention also relate to a hardware device or other apparatus for performing these operations.
- This apparatus may be specially constructed for the required purposes, or it may be a general-purpose computer selectively activated or reconfigured by a computer program and/or data structure stored in the computer.
- the processes presented herein are not inherently related to any particular computer or other apparatus.
- various general-purpose machines may be used with programs written in accordance with the teachings herein, or it may be more convenient to construct a more specialized apparatus to perform the required method steps. A particular structure for a variety of these machines will be apparent to those of ordinary skill in the art based on the present description.
- embodiments of the present invention relate to computer readable media or computer program products that include program instructions and/or data (including data structures) for performing various computer-implemented operations.
- Examples of computer-readable media include, but are not limited to, magnetic media such as hard disks, floppy disks, and magnetic tape; optical media such as CD-ROM disks; magneto-optical media; semiconductor memory devices, and hardware devices that are specially configured to store and perform program instructions, such as readonly memory devices (ROM) and random access memory (RAM).
- ROM readonly memory devices
- RAM random access memory
- the data and program instructions of this invention may also be embodied on a carrier wave or other transport medium.
- Examples of program instructions include both machine code, such as produced by a compiler, and files containing higher level code that may be executed by the computer using an interpreter.
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020037015756A KR100893458B1 (en) | 2001-06-01 | 2002-05-31 | Method of controlling dynamic digital communication system and device for performing the method |
JP2003501859A JP4370418B2 (en) | 2001-06-01 | 2002-05-31 | Dynamic digital communication system control |
EP02734610A EP1396101B1 (en) | 2001-06-01 | 2002-05-31 | Dynamic digital communication system control |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US29539201P | 2001-06-01 | 2001-06-01 | |
US60/295,392 | 2001-06-01 | ||
US09/877,724 | 2001-06-08 | ||
US09/877,724 US7158563B2 (en) | 2001-06-01 | 2001-06-08 | Dynamic digital communication system control |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12167376.8A Previously-Filed-Application EP2533436B8 (en) | 2001-06-01 | 2002-05-31 | Dynamic digital communication system control |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002100008A1 true WO2002100008A1 (en) | 2002-12-12 |
Family
ID=26969097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2002/017117 WO2002100008A1 (en) | 2001-06-01 | 2002-05-31 | Dynamic digital communication system control |
Country Status (8)
Country | Link |
---|---|
US (8) | US7158563B2 (en) |
EP (4) | EP1396101B1 (en) |
JP (3) | JP4370418B2 (en) |
KR (1) | KR100893458B1 (en) |
CN (2) | CN100508432C (en) |
DK (1) | DK2533436T3 (en) |
ES (1) | ES2643690T3 (en) |
WO (1) | WO2002100008A1 (en) |
Cited By (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1429508A2 (en) * | 2002-12-13 | 2004-06-16 | Alcatel Canada Inc. | System and method for establishing a power level for a communication signal transmitted on a wired conductor |
WO2004092911A2 (en) | 2003-04-14 | 2004-10-28 | Cisco Technology, Inc. | System and method for preventing phantom data communication links |
WO2005034459A1 (en) * | 2003-09-30 | 2005-04-14 | Siemens Aktiengesellschaft | Method for regulating the transmission parameters of broadband transmission channels assembled to form a group |
EP1548969A2 (en) * | 2003-12-25 | 2005-06-29 | Hitachi, Ltd. | Control and monitoring of a telecommunication system, and method of setting a modulation method |
EP1563614A1 (en) * | 2002-11-19 | 2005-08-17 | Telcordia Technologies, Inc. | Automated system and method for management of digital subscriber lines |
EP1839451A2 (en) * | 2005-01-14 | 2007-10-03 | SBC Knowledge Ventures L.P. | Method and apparatus for managing a quality of service for a communication link |
DE102006017245A1 (en) * | 2006-04-12 | 2007-10-18 | Infineon Technologies Ag | Data communication device e.g. personal computer, for communicating e.g. data, between subscriber connecting line and e.g. wireless local area network, has modulator modulating data based on discrete multitone transmission modulation method |
EP1863249A1 (en) | 2006-05-30 | 2007-12-05 | Huawei Technologies Co., Ltd. | Method and device for dynamic spectrum management of xDSL upstream and downstream shared frequency |
US7356049B1 (en) | 2001-12-28 | 2008-04-08 | Ikanos Communication, Inc. | Method and apparatus for optimization of channel capacity in multi-line communication systems using spectrum management techniques |
EP1919093A1 (en) * | 2005-09-21 | 2008-05-07 | Huawei Technologies Co., Ltd. | An adaptive power adjustment method and means based on reducing crosstalk among dsl lines |
WO2010064110A1 (en) * | 2008-12-01 | 2010-06-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for power allocation in a multicarrier system |
EP2259564A1 (en) * | 2003-12-07 | 2010-12-08 | Adaptive Spectrum and Signal Alignment, Inc. | DSL system estimation and parameter recommendation |
US7881219B2 (en) | 2006-04-13 | 2011-02-01 | Telefonaktiebolaget Lm Ericsson | Arrangement and method of configuring digital subscriber lines |
WO2011141064A1 (en) * | 2010-05-12 | 2011-11-17 | Nokia Siemens Networks Oy | Adjusting a power allocation of users in a digital subscriber line environment |
CN101133564B (en) * | 2005-03-03 | 2012-06-27 | 适应性频谱和信号校正股份有限公司 | Method and device of DSL state and line profile control |
US8644870B2 (en) | 2008-11-21 | 2014-02-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Sum-rate balancing in wireless multicell and multicarrier system |
US8848555B2 (en) | 2008-11-27 | 2014-09-30 | Telefonaktiebolaget L M Ericsson (Publ) | Method and a system for management of transmission resources in digital communication systems |
US9071534B2 (en) | 2003-12-07 | 2015-06-30 | Adaptive Spectrum And Signal Alignment, Inc. | DSL system estimation |
EP2938095A1 (en) * | 2014-04-25 | 2015-10-28 | Alcatel Lucent | Full-duplex communication over a shared transmission medium |
EP2728820A3 (en) * | 2012-10-30 | 2016-07-06 | Lantiq Deutschland GmbH | Spectrum Management |
CN109101464A (en) * | 2018-07-13 | 2018-12-28 | 清华大学 | Based on the modified electric system sparse matrix Parallel implementation method and system of matrix |
Families Citing this family (190)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6885746B2 (en) * | 2001-07-31 | 2005-04-26 | Telecordia Technologies, Inc. | Crosstalk identification for spectrum management in broadband telecommunications systems |
US8291457B2 (en) | 2001-05-24 | 2012-10-16 | Vixs Systems, Inc. | Channel selection in a multimedia system |
US20090031419A1 (en) | 2001-05-24 | 2009-01-29 | Indra Laksono | Multimedia system and server and methods for use therewith |
US7158563B2 (en) | 2001-06-01 | 2007-01-02 | The Board Of Trustees Of The Leland Stanford Junior University | Dynamic digital communication system control |
US20030099285A1 (en) * | 2001-07-31 | 2003-05-29 | Graziano Michael J. | Method and system for determining data rate using sub-band capacity |
US20030099286A1 (en) * | 2001-07-31 | 2003-05-29 | Graziano Michael J. | Method and system for shaping transmitted power spectral density according to line conditions |
US20030031239A1 (en) * | 2001-08-08 | 2003-02-13 | Posthuma Carl Robert | Maximizing DSL throughput |
US20030123487A1 (en) * | 2001-09-05 | 2003-07-03 | Blackwell Steven R. | SHDSL over POTS |
US7218681B2 (en) * | 2001-10-11 | 2007-05-15 | Agere Systems Inc. | Method and apparatus for cross-talk mitigation through joint multiuser adaptive pre-coding |
ATE465559T1 (en) * | 2001-11-21 | 2010-05-15 | Ericsson Telefon Ab L M | DYNAMIC FREQUENCY SPECTRUM ALLOCATION |
US7042934B2 (en) * | 2002-01-23 | 2006-05-09 | Actelis Networks Inc. | Crosstalk mitigation in a modem pool environment |
US6862271B2 (en) | 2002-02-26 | 2005-03-01 | Qualcomm Incorporated | Multiple-input, multiple-output (MIMO) systems with multiple transmission modes |
US7152025B2 (en) * | 2002-02-28 | 2006-12-19 | Texas Instruments Incorporated | Noise identification in a communication system |
US7362719B2 (en) * | 2002-03-22 | 2008-04-22 | Agere Systems Inc. | Method and apparatus for cross-talk cancellation in frequency division multiplexed transmission systems |
US7151803B1 (en) * | 2002-04-01 | 2006-12-19 | At&T Corp. | Multiuser allocation method for maximizing transmission capacity |
US7313130B2 (en) * | 2002-04-01 | 2007-12-25 | Texas Instruments Incorporated | Spectrally compatible mask for enhanced upstream data rates in DSL systems |
CA2380246A1 (en) * | 2002-04-04 | 2003-10-04 | Catena Networks Canada Inc. | Crosstalk masking for digital subscriber loops |
US8139658B2 (en) * | 2002-06-07 | 2012-03-20 | Tokyo Electron Limited | Method and system for providing a time equalizer for multiline transmission in communication systems |
US7551544B2 (en) * | 2002-07-03 | 2009-06-23 | Timo Laakso | Power control of digital subscriber line |
US20040071165A1 (en) * | 2002-07-08 | 2004-04-15 | Redfern Arthur J. | Multitone hybrid FDD/TDD duplex |
TWI271070B (en) * | 2002-07-08 | 2007-01-11 | Texas Instruments Inc | Shaped PSD design for DSL systems |
US8194770B2 (en) | 2002-08-27 | 2012-06-05 | Qualcomm Incorporated | Coded MIMO systems with selective channel inversion applied per eigenmode |
CN1682506A (en) * | 2002-09-09 | 2005-10-12 | 皇家飞利浦电子股份有限公司 | Filterbank modulation system with pre-equalization |
US7260153B2 (en) * | 2002-09-09 | 2007-08-21 | Mimopro Ltd. | Multi input multi output wireless communication method and apparatus providing extended range and extended rate across imperfectly estimated channels |
WO2004027579A2 (en) * | 2002-09-19 | 2004-04-01 | Tokyo Electron Ltd. | Method and system for split-pair reception in twisted-pair communication systems |
US8169944B2 (en) | 2002-10-25 | 2012-05-01 | Qualcomm Incorporated | Random access for wireless multiple-access communication systems |
US8570988B2 (en) * | 2002-10-25 | 2013-10-29 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US8208364B2 (en) * | 2002-10-25 | 2012-06-26 | Qualcomm Incorporated | MIMO system with multiple spatial multiplexing modes |
US8218609B2 (en) * | 2002-10-25 | 2012-07-10 | Qualcomm Incorporated | Closed-loop rate control for a multi-channel communication system |
US7002900B2 (en) * | 2002-10-25 | 2006-02-21 | Qualcomm Incorporated | Transmit diversity processing for a multi-antenna communication system |
US8134976B2 (en) * | 2002-10-25 | 2012-03-13 | Qualcomm Incorporated | Channel calibration for a time division duplexed communication system |
US8320301B2 (en) * | 2002-10-25 | 2012-11-27 | Qualcomm Incorporated | MIMO WLAN system |
US7986742B2 (en) | 2002-10-25 | 2011-07-26 | Qualcomm Incorporated | Pilots for MIMO communication system |
US7324429B2 (en) | 2002-10-25 | 2008-01-29 | Qualcomm, Incorporated | Multi-mode terminal in a wireless MIMO system |
US20040081131A1 (en) | 2002-10-25 | 2004-04-29 | Walton Jay Rod | OFDM communication system with multiple OFDM symbol sizes |
US8170513B2 (en) * | 2002-10-25 | 2012-05-01 | Qualcomm Incorporated | Data detection and demodulation for wireless communication systems |
US7697408B2 (en) * | 2002-12-13 | 2010-04-13 | Adtran, Inc. | Data communication system and method capable of limiting effects of crosstalk by adjusting transceiver power levels |
US7620154B2 (en) * | 2002-12-23 | 2009-11-17 | Cambron G Keith | Equivalent working length determinative system for digital subscriber line circuits |
US7315592B2 (en) * | 2003-09-08 | 2008-01-01 | Aktino, Inc. | Common mode noise cancellation |
US7227883B2 (en) * | 2003-10-28 | 2007-06-05 | Teranetics, Inc. | Method and apparatus for domain transformation multiple signal processing |
US7239885B2 (en) * | 2003-11-05 | 2007-07-03 | Interdigital Technology Corporation | Initial downlink transmit power adjustment for non-real-time services using dedicated or shared channel |
US9473269B2 (en) | 2003-12-01 | 2016-10-18 | Qualcomm Incorporated | Method and apparatus for providing an efficient control channel structure in a wireless communication system |
US7428669B2 (en) * | 2003-12-07 | 2008-09-23 | Adaptive Spectrum And Signal Alignment, Inc. | Adaptive FEC codeword management |
US7639596B2 (en) | 2003-12-07 | 2009-12-29 | Adaptive Spectrum And Signal Alignment, Inc. | High speed multiple loop DSL system |
EP1721230B1 (en) | 2003-12-07 | 2017-05-10 | Adaptive Spectrum and Signal Alignment, Inc. | Adaptive margin and band control |
WO2007008836A2 (en) * | 2005-07-10 | 2007-01-18 | Adaptive Spectrum And Signal Alignment, Inc. | Adaptive margin and band control |
US8031761B2 (en) * | 2003-12-07 | 2011-10-04 | Adaptive Spectrum And Signal Alignment, Inc. | Adaptive margin and band control |
US7809116B2 (en) | 2003-12-07 | 2010-10-05 | Adaptive Spectrum And Signal Alignment, Inc. | DSL system estimation including known DSL line scanning and bad splice detection capability |
US7239696B2 (en) * | 2003-12-15 | 2007-07-03 | International Business Machines Corporation | Automatic reset for DSL lines |
US7274734B2 (en) * | 2004-02-20 | 2007-09-25 | Aktino, Inc. | Iterative waterfiling with explicit bandwidth constraints |
US20050195892A1 (en) * | 2004-03-05 | 2005-09-08 | Texas Instruments Incorporated | Training and updating for multiple input-output wireline communications |
US7342937B2 (en) * | 2004-03-05 | 2008-03-11 | Texas Instruments Incorporated | Spectrally flexible band plans with reduced filtering requirements |
US7573819B2 (en) * | 2004-04-01 | 2009-08-11 | Verizon Services Corp. | Methods and apparatus for controlling bandwidth and service in a communications system |
US7408980B2 (en) * | 2004-04-02 | 2008-08-05 | Texas Instruments Incorporated | Semi-distributed power spectrum control for digital subscriber line communications |
US7489746B1 (en) * | 2004-04-22 | 2009-02-10 | Qualcomm, Inc. | MIMO receiver using maximum likelihood detector in combination with QR decomposition |
US7593458B2 (en) * | 2004-05-18 | 2009-09-22 | Adaptive Spectrum And Signal Alignment, Inc. | FEXT determination system |
US20060029148A1 (en) * | 2004-08-06 | 2006-02-09 | Tsatsanis Michail K | Method and apparatus for training using variable transmit signal power levels |
US20060056282A1 (en) * | 2004-09-13 | 2006-03-16 | Suman Das | Method of scheduling and forward link resource allocation in OFDM systems |
US20060062288A1 (en) * | 2004-09-21 | 2006-03-23 | Texas Instruments Incorporated | Short loop ADSL power spectral density management |
US7400720B2 (en) * | 2004-10-05 | 2008-07-15 | Sbc Knowledge Ventures, L.P. | System and method for optimizing digital subscriber line based services |
ES2397074T3 (en) | 2004-10-13 | 2013-03-04 | Mcmaster University | Transmission power control techniques for wireless communication systems |
US8468041B1 (en) * | 2004-10-26 | 2013-06-18 | Oracle America, Inc. | Using reinforcement learning to facilitate dynamic resource allocation |
DE602004015483D1 (en) * | 2004-12-08 | 2008-09-11 | Alcatel Lucent | Method and apparatus for spectrum management for communication channels with crosstalk |
US7295603B2 (en) * | 2004-12-13 | 2007-11-13 | Conexant Systems, Inc. | Method and system for virtual exchange reference impact (VERI) for use in mixed spectrum management in DSL |
US20100197233A1 (en) * | 2004-12-14 | 2010-08-05 | Andrew Joo Kim | Method and System for Automatic Control in an Interference Cancellation Device |
FR2879379A1 (en) * | 2004-12-14 | 2006-06-16 | St Microelectronics Sa | VDSL TRANSMISSION BETWEEN TWO GROUPS OF MODEMS |
US7522883B2 (en) * | 2004-12-14 | 2009-04-21 | Quellan, Inc. | Method and system for reducing signal interference |
DE602004025833D1 (en) * | 2004-12-20 | 2010-04-15 | Alcatel Lucent | Method and apparatus for determining the transmitter PSD at a remote location |
US7453822B2 (en) * | 2005-01-18 | 2008-11-18 | At&T Intellectual Property I, L.P. | System and method for managing broadband services |
US7590195B2 (en) * | 2005-02-23 | 2009-09-15 | Nec Laboratories America, Inc. | Reduced-complexity multiple-input multiple-output (MIMO) channel detection via sequential Monte Carlo |
US7773497B2 (en) * | 2005-05-09 | 2010-08-10 | Adaptive Spectrum And Signal Alignment, Inc. | Phantom use in DSL systems |
US7684546B2 (en) * | 2005-05-09 | 2010-03-23 | Adaptive Spectrum And Signal Alignment, Inc. | DSL system estimation and control |
US8073135B2 (en) * | 2005-05-10 | 2011-12-06 | Adaptive Spectrum And Signal Alignment, Inc. | Binder identification |
US7774398B2 (en) * | 2005-05-10 | 2010-08-10 | Adaptive Spectrum And Signal Alignment, Inc. | Tonal rotors |
US7466749B2 (en) | 2005-05-12 | 2008-12-16 | Qualcomm Incorporated | Rate selection with margin sharing |
US7489944B2 (en) * | 2005-06-01 | 2009-02-10 | Alcatel-Lucent Usa Inc. | Method of allocating power over channels of a communication system |
US7991122B2 (en) * | 2005-06-02 | 2011-08-02 | Adaptive Spectrum And Signal Alignment, Inc. | DSL system training |
US7817745B2 (en) * | 2005-06-02 | 2010-10-19 | Adaptive Spectrum And Signal Alignment, Inc. | Tonal precoding |
US7813420B2 (en) * | 2005-06-02 | 2010-10-12 | Adaptive Spectrum And Signal Alignment, Inc. | Adaptive GDFE |
US7881438B2 (en) * | 2005-06-02 | 2011-02-01 | Adaptive Spectrum And Signal Alignment, Inc. | Self-learning and self-adjusting DSL system |
US7688884B2 (en) * | 2005-06-10 | 2010-03-30 | Adaptive Spectrum And Signal Alignment, Inc. | Vectored DSL nesting |
US7852952B2 (en) * | 2005-06-10 | 2010-12-14 | Adaptive Spectrum And Signal Alignment, Inc. | DSL system loading and ordering |
US7558213B2 (en) * | 2005-06-15 | 2009-07-07 | AT&T Intellectual Property I, LLP | Methods and apparatus to determine digital subscriber line configuration parameters |
US8358714B2 (en) * | 2005-06-16 | 2013-01-22 | Qualcomm Incorporated | Coding and modulation for multiple data streams in a communication system |
EP1932076B1 (en) | 2005-10-04 | 2020-07-08 | Assia Spe, Llc | Dsl system |
TWI274482B (en) * | 2005-10-18 | 2007-02-21 | Ind Tech Res Inst | MIMO-OFDM system and pre-coding and feedback method therein |
US7769100B2 (en) * | 2005-12-10 | 2010-08-03 | Electronics And Telecommunications Research Institute | Method and apparatus for cancellation of cross-talk signals using multi-dimensional coordination and vectored transmission |
US7813293B2 (en) * | 2006-05-12 | 2010-10-12 | John Papandriopoulos | Method for distributed spectrum management of digital communications systems |
AU2006202136B2 (en) * | 2006-05-19 | 2012-02-02 | Ericsson Ab | Method for distributed spectrum management of digital communication systems |
US7860020B2 (en) * | 2006-05-22 | 2010-12-28 | Plx Technology, Inc. | Master/slave transceiver power back-off |
US20140369480A1 (en) | 2013-06-12 | 2014-12-18 | Adaptive Spectrum And Signal Alignment, Inc. | Systems, methods, and apparatuses for implementing a dsl system |
EP2030454B2 (en) * | 2006-06-06 | 2016-09-07 | Adaptive Spectrum and Signal Alignment, Inc. | Vectored dsl system |
JP4928611B2 (en) * | 2006-08-25 | 2012-05-09 | イカノス テクノロジー リミテッド | System and method for MIMO precoding in xDSL systems |
US8009574B2 (en) | 2006-09-25 | 2011-08-30 | Lantiq Deutschland Gmbh | Power level settings for transmission lines |
US9515857B2 (en) * | 2006-10-11 | 2016-12-06 | Lantiq Beteiligungs-GmbH & Co. KG | Methods and systems for adaptive communication |
US20080089433A1 (en) * | 2006-10-13 | 2008-04-17 | Jun Hyok Cho | Method and apparatus for adapting to dynamic channel conditions in a multi-channel communication system |
US20080130496A1 (en) * | 2006-12-01 | 2008-06-05 | Bandrich Inc. | Method and system for video transmission using 3g mobile network |
US8369205B2 (en) | 2006-12-22 | 2013-02-05 | Lantiq Deutschland Gmbh | Determining information indicating a length of a part of a first cable |
US8345565B2 (en) * | 2007-01-16 | 2013-01-01 | Nxp B.V. | Method and system for operating a wireless access point in the presence of bursty interference |
US7974334B2 (en) * | 2007-01-30 | 2011-07-05 | Texas Instruments Incorporated | Systems and methods for hybrid-MIMO equalization |
US7839919B2 (en) * | 2007-02-13 | 2010-11-23 | Infineon Technologies Ag | Adjusting transmit power spectra of transceiver devices in a communications network |
CN101272160B (en) | 2007-03-20 | 2013-06-05 | 华为技术有限公司 | Method and device for confirming DSL reference virtual noise, configuration method and system |
US7978591B2 (en) * | 2007-03-31 | 2011-07-12 | Tokyo Electron Limited | Mitigation of interference and crosstalk in communications systems |
US8175555B2 (en) | 2007-05-07 | 2012-05-08 | Analogix Semiconductor, Inc. | Apparatus and method for termination powered differential interface periphery |
US9041241B2 (en) | 2007-05-07 | 2015-05-26 | Analogix Semiconductor, Inc. | Systems and methods for powering a charging circuit of a communications interface |
US8035359B2 (en) | 2007-05-07 | 2011-10-11 | Analogix Semiconductor, Inc. | Apparatus and method for recovery of wasted power from differential drivers |
US8063504B2 (en) | 2007-05-07 | 2011-11-22 | Analogix Semiconductor, Inc. | Systems and methods for powering circuits for a communications interface |
US7864697B2 (en) * | 2007-08-03 | 2011-01-04 | John Papandriopoulos | Adapted method for spectrum management of digital communication systems |
AU2007203630B2 (en) * | 2007-08-03 | 2012-01-12 | Ericsson Ab | Adapted method for spectrum management of digital communication systems |
JP4412505B2 (en) * | 2007-08-08 | 2010-02-10 | 日本電気株式会社 | Wireless communication system |
CN101453242B (en) * | 2007-08-15 | 2013-01-09 | 华为技术有限公司 | DSL reference virtual noise determination method and apparatus, configuration method and system |
EP2034622A1 (en) * | 2007-09-10 | 2009-03-11 | Alcatel Lucent | A device and associated method for measuring crosstalk |
US8892221B2 (en) * | 2007-09-18 | 2014-11-18 | Groundswell Technologies, Inc. | Integrated resource monitoring system with interactive logic control for well water extraction |
US20090076632A1 (en) * | 2007-09-18 | 2009-03-19 | Groundswell Technologies, Inc. | Integrated resource monitoring system with interactive logic control |
EP2208146A4 (en) * | 2007-10-29 | 2010-11-03 | Nec Lab America Inc | Discovering optimal system configurations using decentralized probability based active sampling |
KR101267799B1 (en) | 2007-11-12 | 2013-06-04 | 삼성전자주식회사 | Apparatus and method for canceling inter symbol interference of othogonal coded signal in mobile communication system |
US8369444B2 (en) * | 2008-02-04 | 2013-02-05 | Samsung Electronics Co., Ltd. | Apparatus and method for beamforming in a multi-antenna system |
US8817907B2 (en) * | 2008-03-26 | 2014-08-26 | Ikanos Communications, Inc. | Systems and methods for signaling for vectoring of DSL systems |
CN101562487B (en) * | 2008-04-18 | 2013-09-11 | 华为技术有限公司 | Frequency spectrum optimization method, device and digital user line system |
US9608838B2 (en) * | 2008-06-09 | 2017-03-28 | Genesis Technical Systems Corp. | Bonded interconnection of local networks |
US8854941B2 (en) | 2008-06-10 | 2014-10-07 | Ikanos Communications, Inc. | Vectored DSL crosstalk cancellation |
KR101567118B1 (en) | 2008-07-01 | 2015-11-06 | 이카노스 커뮤니케이션스, 인크. | Reduced Memory Vectored DSL |
FR2933828B1 (en) * | 2008-07-08 | 2011-10-28 | Excem | MULTICANAL INTERFERENCE DEVICE WITH TERMINATION CIRCUIT |
CN102017557B (en) * | 2008-07-18 | 2013-10-16 | 上海贝尔股份有限公司 | Methods and devices for making exchange processing for multiple sub channel signals in SC-FDMA system |
US8249540B1 (en) | 2008-08-07 | 2012-08-21 | Hypres, Inc. | Two stage radio frequency interference cancellation system and method |
TWI441464B (en) * | 2008-10-17 | 2014-06-11 | Realtek Semiconductor Corp | Network communication device for increasing linking quality and method thereof |
US8374270B2 (en) * | 2009-06-17 | 2013-02-12 | Intersil Americas Inc. | Constellation detection in a multi-mode QAM communications system |
US8217802B2 (en) * | 2009-02-03 | 2012-07-10 | Schlumberger Technology Corporation | Methods and systems for borehole telemetry |
US8362916B2 (en) * | 2009-02-05 | 2013-01-29 | Schlumberger Technology Corporation | Methods and systems for borehole telemetry |
US8218419B2 (en) * | 2009-02-12 | 2012-07-10 | Alcatel Lucent | Simultaneous estimation of multiple channel coefficients using a common probing sequence |
WO2010138043A1 (en) * | 2009-05-29 | 2010-12-02 | Telefonaktiebolaget Lm Ericsson (Publ) | Operating points for spectrum management in digital subscriber lines |
US20110007623A1 (en) * | 2009-07-10 | 2011-01-13 | Futurewei Technologies, Inc. | Method for Estimating the Strength of a Crosstalk Channel |
JP5348418B2 (en) * | 2009-11-19 | 2013-11-20 | 横河電機株式会社 | controller |
KR101394106B1 (en) * | 2009-12-17 | 2014-05-27 | 알까뗄 루슨트 | Crosstalk control method and apparatus using a bandwidth-adaptive precoder interface |
US20110273268A1 (en) * | 2010-05-10 | 2011-11-10 | Fred Bassali | Sparse coding systems for highly secure operations of garage doors, alarms and remote keyless entry |
EP2577879B1 (en) * | 2010-06-01 | 2018-03-07 | Telefonaktiebolaget LM Ericsson (publ) | Method and arrangement in a dsl vectoring system |
EP2596607B1 (en) * | 2010-07-22 | 2016-11-02 | Ikanos Communications, Inc. | Reduced memory vectored dsl |
WO2012015714A2 (en) | 2010-07-28 | 2012-02-02 | Ikanos Communications, Inc. | Upbo for vectored dsl |
US8605567B2 (en) * | 2010-12-02 | 2013-12-10 | Adtran, Inc. | Apparatuses and methods for enabling crosstalk vectoring in expandable communication systems |
US8369485B2 (en) | 2010-12-07 | 2013-02-05 | At&T Intellectual Property I, L.P. | Methods, apparatus, and articles of manufacture to trigger preemptive maintenance in vectored digital subscriber line (DSL) systems |
EP2464026B1 (en) * | 2010-12-10 | 2016-07-06 | Alcatel Lucent | Time-Alignment of Crosstalk Acquisition Phases between Multiple Joining Lines |
JP5664295B2 (en) * | 2011-02-03 | 2015-02-04 | 富士通株式会社 | Communication device and communication device setting method |
EP2681849B1 (en) | 2011-03-02 | 2016-01-06 | Adtran, Inc. | Systems and methods selectively excluding tones from vectoring |
EP2506496B1 (en) * | 2011-03-29 | 2015-05-13 | Alcatel Lucent | Method for performing spectrum management in a subscriber premises network |
US9143195B2 (en) | 2011-07-07 | 2015-09-22 | Adtran, Inc. | Systems and methods for communicating among network distribution points |
US8804798B2 (en) | 2011-09-16 | 2014-08-12 | Aquantia Corporation | Transceiver spectrum control for cross-talk mitigation |
EP2763324B1 (en) | 2011-11-03 | 2016-09-07 | Huawei Technologies Co., Ltd. | Method, apparatus and system for reducing interference in digital subscriber line |
US20150124959A1 (en) * | 2012-03-30 | 2015-05-07 | Nokia Solutions And Networks Oy | Method, system and device for reducing interference between a first and a second digital subscriber line |
EP2675099A1 (en) * | 2012-06-11 | 2013-12-18 | Lantiq Deutschland GmbH | Rate-adaptive dynamic spectrum management |
ES2711355T3 (en) * | 2013-01-11 | 2019-05-03 | Alcatel Lucent | Gain adaptation for downstream vectorization systems |
JP2014179793A (en) * | 2013-03-14 | 2014-09-25 | Kddi Corp | Radio communication system and its method, transmitting device and its method, receiving device and its method, and radio communication device |
EP2784987A1 (en) * | 2013-03-28 | 2014-10-01 | British Telecommunications public limited company | Access network management |
TWI517639B (en) * | 2013-04-10 | 2016-01-11 | 瑞昱半導體股份有限公司 | Pre-distortion mechanism for transmit path non-linearity in xdsl afe |
US10225147B2 (en) * | 2013-04-23 | 2019-03-05 | Adaptive Spectrum And Signal Alignment, Inc. | Methods, systems, and apparatuses for implementing upstream power control for DSL |
WO2014180794A1 (en) | 2013-05-05 | 2014-11-13 | Lantiq Deutschland Gmbh | Low power modes for data transmission from a distribution point |
BR112015028024B1 (en) * | 2013-05-13 | 2022-12-27 | Lantiq Beteiligungs-GmbH & Co. KG | METHOD AND DEVICE TO SUPPORT DISCONTINUOUS OPERATION IN COMMUNICATION SYSTEMS USING VECTORIZATION |
EP3103207B1 (en) * | 2014-03-14 | 2018-09-26 | Huawei Technologies Co., Ltd. | Method and apparatus for providing twisted pair multilink communications |
WO2015144538A1 (en) * | 2014-03-25 | 2015-10-01 | Lantiq Beteiligungs-GmbH & Co.KG | Interference mitigation |
US10536581B2 (en) | 2014-05-30 | 2020-01-14 | British Telecommunications Public Limited Company | Dynamic line management engine residing in the access network |
WO2016015951A1 (en) * | 2014-07-30 | 2016-02-04 | British Telecommunications Public Limited Company | Method and apparatus for allocating power levels to a transmission in a digital subscriber line network |
US9379791B2 (en) * | 2014-08-01 | 2016-06-28 | Qualcomm Incorporated | Multiple input multiple output (MIMO) communication systems and methods for chip to chip and intrachip communication |
EP2996254A1 (en) * | 2014-09-12 | 2016-03-16 | Alcatel Lucent | Low complex joining for non-linear precoders |
US9319113B2 (en) | 2014-09-19 | 2016-04-19 | Qualcomm Incorporated | Simplified multiple input multiple output (MIMO) communication schemes for interchip and intrachip communications |
EP3514976A1 (en) | 2014-10-24 | 2019-07-24 | Lantiq Beteiligungs-GmbH & Co.KG | Communication coexistence in overlap spectrum |
EP3032789B1 (en) * | 2014-12-11 | 2018-11-14 | Alcatel Lucent | Non-linear precoding with a mix of NLP capable and NLP non-capable lines |
US10069521B1 (en) | 2015-01-29 | 2018-09-04 | Aquantia Corp. | Intelligent power balancing for NBASE-T ethernet |
US9756112B2 (en) | 2015-02-11 | 2017-09-05 | At&T Intellectual Property I, L.P. | Method and system for managing service quality according to network status predictions |
US9948371B2 (en) * | 2015-05-11 | 2018-04-17 | Futurewei Technologies, Inc. | Multi-user multiple-input and multiple-output for digital subscriber line |
JP2016220121A (en) * | 2015-05-25 | 2016-12-22 | 三菱電機株式会社 | OFDM communication system |
US9584518B1 (en) * | 2015-09-09 | 2017-02-28 | Callware Technologies, Inc. | Dynamic communications controller |
GB2542437A (en) * | 2015-09-16 | 2017-03-22 | British Telecomm | Method and apparatus for operating a digital subscriber line arrangement |
WO2017052514A1 (en) * | 2015-09-22 | 2017-03-30 | Halliburton Energy Services, Inc. | Scalable communication system for hydrocarbon wells |
EP3154205B1 (en) * | 2015-10-06 | 2018-07-18 | Alcatel Lucent | Targeted rectangular conditioning |
US10291285B2 (en) | 2015-11-09 | 2019-05-14 | Commscope, Inc. Of North Carolina | Methods for performing multi-disturber alien crosstalk limited signal-to-noise ratio tests |
CN106209262B (en) * | 2016-10-10 | 2019-02-05 | 深圳市共进电子股份有限公司 | A kind of ground structure of home gateway |
US10827211B2 (en) | 2016-10-10 | 2020-11-03 | At&T Intellectual Property I, L.P. | Method and apparatus for managing over-the-top video rate |
CN110036625B (en) | 2016-11-08 | 2021-11-19 | 英国电讯有限公司 | System for transmitting data |
WO2018087106A1 (en) | 2016-11-08 | 2018-05-17 | British Telecommunications Public Limited Company | Method and apparatus for operating a digital subscriber line arrangement |
US10680843B2 (en) | 2016-12-21 | 2020-06-09 | British Telecommunications Public Limited Company | Network node |
EP3343786B1 (en) * | 2016-12-28 | 2020-02-26 | Alcatel Lucent | Method and device for configuring data transmission over a plurality of data lines |
WO2019158526A1 (en) | 2018-02-15 | 2019-08-22 | British Telecommunications Public Limited Company | Digital subscriber line interference identification |
US10840971B2 (en) * | 2018-08-21 | 2020-11-17 | Micron Technology, Inc. | Pre-distortion for multi-level signaling |
US10693575B2 (en) | 2018-08-31 | 2020-06-23 | At&T Intellectual Property I, L.P. | System and method for throughput prediction for cellular networks |
US10868726B2 (en) | 2018-12-07 | 2020-12-15 | At&T Intellectual Property I, L.P. | Apparatus and method for selecting a bandwidth prediction source |
US11490149B2 (en) | 2019-03-15 | 2022-11-01 | At&T Intellectual Property I, L.P. | Cap-based client-network interaction for improved streaming experience |
US11115151B1 (en) | 2019-03-22 | 2021-09-07 | Marvell Asia Pte, Ltd. | Method and apparatus for fast retraining of ethernet transceivers based on trickling error |
US10771100B1 (en) | 2019-03-22 | 2020-09-08 | Marvell Asia Pte., Ltd. | Method and apparatus for efficient fast retraining of ethernet transceivers |
US11228465B1 (en) | 2019-03-22 | 2022-01-18 | Marvell Asia Pte, Ltd. | Rapid training method for high-speed ethernet |
US11228340B1 (en) * | 2019-08-28 | 2022-01-18 | Marvell Asia Pte, Ltd. | Ethernet link transmit power method based on network provided alien crosstalk feedback |
CN112054977B (en) * | 2020-09-16 | 2022-05-27 | 湖南工商大学 | Optical transmission method and device based on power spectrum shaping |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5887034A (en) * | 1996-03-29 | 1999-03-23 | Nec Corporation | DS-CDMA multiple user serial interference canceler unit and method of transmitting interference replica signal of the same |
Family Cites Families (79)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4191926A (en) * | 1977-09-16 | 1980-03-04 | Communications Satellite Corporation | Method and apparatus for interference cancellation at base-band using multiplication of the desired interfering carriers |
US5282222A (en) * | 1992-03-31 | 1994-01-25 | Michel Fattouche | Method and apparatus for multiple access between transceivers in wireless communications using OFDM spread spectrum |
US5377230A (en) * | 1992-05-01 | 1994-12-27 | At&T Corp. | Extended bandwidth transmitter for crosstalk channels |
US5471647A (en) | 1993-04-14 | 1995-11-28 | The Leland Stanford Junior University | Method for minimizing cross-talk in adaptive transmission antennas |
JPH06326723A (en) * | 1993-05-12 | 1994-11-25 | Nec Corp | Incoming direction transmission timing decision system for star type optical subscriber system |
US5521925A (en) * | 1993-09-09 | 1996-05-28 | Hughes Aircraft Company | Method and apparatus for providing mixed voice and data communication in a time division multiple access radio communication system |
US5604769A (en) * | 1994-10-13 | 1997-02-18 | Lucent Technologies Inc. | Hybrid equalizer arrangement for use in data communications equipment |
US5809033A (en) * | 1995-08-18 | 1998-09-15 | Adtran, Inc. | Use of modified line encoding and low signal-to-noise ratio based signal processing to extend range of digital data transmission over repeaterless two-wire telephone link |
US6307868B1 (en) * | 1995-08-25 | 2001-10-23 | Terayon Communication Systems, Inc. | Apparatus and method for SCDMA digital data transmission using orthogonal codes and a head end modem with no tracking loops |
EP0767543A3 (en) * | 1995-10-06 | 2000-07-26 | Siemens Aktiengesellschaft | Code division multiplex communication with interference suppression |
US5683432A (en) * | 1996-01-11 | 1997-11-04 | Medtronic, Inc. | Adaptive, performance-optimizing communication system for communicating with an implanted medical device |
US6014412A (en) * | 1996-04-19 | 2000-01-11 | Amati Communications Corporation | Digital radio frequency interference canceller |
US5995567A (en) * | 1996-04-19 | 1999-11-30 | Texas Instruments Incorporated | Radio frequency noise canceller |
US6035000A (en) * | 1996-04-19 | 2000-03-07 | Amati Communications Corporation | Mitigating radio frequency interference in multi-carrier transmission systems |
ATE317183T1 (en) * | 1996-06-27 | 2006-02-15 | Interdigital Tech Corp | A METHOD FOR CONTROLLING THE RAMP UP OF INITIAL TRANSMIT POWER IN A CDMA SYSTEM USING SHORT CODE |
US5887032A (en) * | 1996-09-03 | 1999-03-23 | Amati Communications Corp. | Method and apparatus for crosstalk cancellation |
JPH10200975A (en) * | 1997-01-08 | 1998-07-31 | Matsushita Electric Ind Co Ltd | Synchronization system between subscriber's equipments of star optical subscriber system |
EP0854619A1 (en) * | 1997-01-15 | 1998-07-22 | Alcatel | Method to allocate data bits, multicarrier transmitter and receiver using the method, and related allocation message generator |
US5731706A (en) * | 1997-02-18 | 1998-03-24 | Koeman; Henriecus | Method for efficient calculation of power sum cross-talk loss |
US6064692A (en) * | 1997-06-20 | 2000-05-16 | Amati Communications Corporation | Protocol for transceiver initialization |
US6553085B1 (en) * | 1997-07-31 | 2003-04-22 | Francois Trans | Means and method for increasing performance of interference-suppression based receivers |
US6101216A (en) * | 1997-10-03 | 2000-08-08 | Rockwell International Corporation | Splitterless digital subscriber line communication system |
US5991311A (en) * | 1997-10-25 | 1999-11-23 | Centillium Technology | Time-multiplexed transmission on digital-subscriber lines synchronized to existing TCM-ISDN for reduced cross-talk |
US6134283A (en) * | 1997-11-18 | 2000-10-17 | Amati Communications Corporation | Method and system for synchronizing time-division-duplexed transceivers |
US6292559B1 (en) * | 1997-12-19 | 2001-09-18 | Rice University | Spectral optimization and joint signaling techniques with upstream/downstream separation for communication in the presence of crosstalk |
US6144695A (en) * | 1997-12-23 | 2000-11-07 | At&T Corp. | Method and apparatus for reducing near-end crosstalk (NEXT) in discrete multi-tone modulator/demodulators |
US6236645B1 (en) * | 1998-03-09 | 2001-05-22 | Broadcom Corporation | Apparatus for, and method of, reducing noise in a communications system |
WO1999050679A2 (en) * | 1998-03-30 | 1999-10-07 | 3Com Corporation | Low complexity frequency estimator and interference cancellation method and device |
US6226356B1 (en) * | 1998-06-12 | 2001-05-01 | Legerity Inc. | Method and apparatus for power regulation of digital data transmission |
JP2000049724A (en) * | 1998-07-13 | 2000-02-18 | Integrated Telecom Express | High speed communication system provided with prospective compatibility and extendability and its operating method |
US6597705B1 (en) * | 1998-09-10 | 2003-07-22 | Qualcomm Incorporated | Method and apparatus for distributed optimal reverse link scheduling of resources, such as a rate and power in a wireless communication system |
SE9900788L (en) * | 1998-11-21 | 2000-05-22 | Telia Ab | Improvements to, or with respect to, VDSL transmission systems |
GB9828216D0 (en) * | 1998-12-21 | 1999-02-17 | Northern Telecom Ltd | A downlink beamforming approach for frequency division duplex cellular systems |
US6985548B1 (en) * | 1999-02-03 | 2006-01-10 | Conexant Systems, Inc. | System and method for timing recovery in a discrete multi-tone system |
US6516027B1 (en) * | 1999-02-18 | 2003-02-04 | Nec Usa, Inc. | Method and apparatus for discrete multitone communication bit allocation |
AU3374500A (en) | 1999-02-23 | 2000-09-14 | Aware, Inc. | Apparatus and method of tone allocation in digital subscriber line systems |
US6680978B1 (en) * | 1999-03-01 | 2004-01-20 | Adtran, Inc. | Method and apparatus for nonlinear filtering and controlling the peak-to-average ratio |
US7035400B1 (en) * | 1999-03-01 | 2006-04-25 | Wm. Marsh Rice University | Signaling Techniques in channels with asymmetric powers and capacities |
US7027537B1 (en) * | 1999-03-05 | 2006-04-11 | The Board Of Trustees Of The Leland Stanford Junior University | Iterative multi-user detection |
JP2000269919A (en) | 1999-03-16 | 2000-09-29 | Matsushita Electric Ind Co Ltd | Ofdm communication unit |
SE514948C2 (en) * | 1999-03-29 | 2001-05-21 | Ericsson Telefon Ab L M | Method and apparatus for reducing crosstalk |
JP3084368B1 (en) | 1999-03-30 | 2000-09-04 | 株式会社次世代デジタルテレビジョン放送システム研究所 | OFDM receiver |
US6597745B1 (en) * | 1999-04-06 | 2003-07-22 | Eric M. Dowling | Reduced complexity multicarrier precoder |
JP2000311302A (en) * | 1999-04-28 | 2000-11-07 | Toshiba Corp | Disk storage device and data reproducing device to be applied to the same device |
JP2000349800A (en) * | 1999-06-08 | 2000-12-15 | Nec Corp | Optical burst signal multiple transmission system |
US6975603B1 (en) * | 1999-08-20 | 2005-12-13 | Siemens Communications Inc. | System and method for minimizing the loss of information in cordless communications |
JP3492565B2 (en) | 1999-09-13 | 2004-02-03 | 松下電器産業株式会社 | OFDM communication device and detection method |
US7409007B1 (en) * | 1999-09-14 | 2008-08-05 | Lucent Technologies Inc. | Method and apparatus for reducing adjacent channel power in wireless communication systems |
US6400761B1 (en) * | 1999-09-15 | 2002-06-04 | Princeton University | Method and apparatus for adaptively compensating channel or system variations in precoded communications system |
JP3116090B1 (en) | 1999-09-17 | 2000-12-11 | 郵政省通信総合研究所長 | Communication system, transmitting device, receiving device, transmitting method, receiving method, and information recording medium |
JP2001086007A (en) | 1999-09-17 | 2001-03-30 | Mitsubishi Electric Corp | Communication device and communication method |
TW472469B (en) * | 1999-10-07 | 2002-01-11 | Ibm | Adaptive power control in wideband CDMA cellular systems (WCDMA) and methods of operation |
CN1921323A (en) * | 1999-10-19 | 2007-02-28 | 美商内数位科技公司 | Receiver for multiuser detection CDMA signals |
US6978015B1 (en) * | 1999-11-11 | 2005-12-20 | Tokyo Electron Limited | Method and apparatus for cooperative diagnosis of impairments and mitigation of disturbers in communication systems |
US6970560B1 (en) * | 1999-11-11 | 2005-11-29 | Tokyo Electron Limited | Method and apparatus for impairment diagnosis in communication systems |
US6965657B1 (en) * | 1999-12-01 | 2005-11-15 | Velocity Communication, Inc. | Method and apparatus for interference cancellation in shared communication mediums |
US6873653B1 (en) * | 1999-12-17 | 2005-03-29 | Ikanos Communication, Inc. | Method and apparatus for pre-distortion of an X-DSL line driver |
AU2757701A (en) * | 1999-12-30 | 2001-07-16 | Bandspeed, Inc. | Approach for processing data received from a communications channel in finite precision arithmetic applications |
US6477210B2 (en) * | 2000-02-07 | 2002-11-05 | At&T Corp. | System for near optimal joint channel estimation and data detection for COFDM systems |
US6393052B2 (en) * | 2000-02-17 | 2002-05-21 | At&T Corporation | Method and apparatus for minimizing near end cross talk due to discrete multi-tone transmission in cable binders |
DE10009401C2 (en) * | 2000-02-28 | 2003-07-24 | Siemens Ag | Method, mobile radio system and station for determining a lead time for a connection between two stations |
US6724849B1 (en) * | 2000-02-29 | 2004-04-20 | Centillium Communications, Inc. | Method and apparatus for timing recovery in ADSL transceivers under a TCM-ISDN crosstalk environment |
US6795392B1 (en) * | 2000-03-27 | 2004-09-21 | At&T Corp. | Clustered OFDM with channel estimation |
US20020027985A1 (en) * | 2000-06-12 | 2002-03-07 | Farrokh Rashid-Farrokhi | Parallel processing for multiple-input, multiple-output, DSL systems |
US7248841B2 (en) * | 2000-06-13 | 2007-07-24 | Agee Brian G | Method and apparatus for optimization of wireless multipoint electromagnetic communication networks |
US7016822B2 (en) * | 2000-06-30 | 2006-03-21 | Qwest Communications International, Inc. | Method and system for modeling near end crosstalk in a binder group |
US6704367B1 (en) * | 2000-07-26 | 2004-03-09 | Proscend Communications Inc. | Optimal discrete loading algorithm for DMT modulation |
US6885746B2 (en) * | 2001-07-31 | 2005-04-26 | Telecordia Technologies, Inc. | Crosstalk identification for spectrum management in broadband telecommunications systems |
US6999583B2 (en) * | 2000-08-03 | 2006-02-14 | Telcordia Technologies, Inc. | Crosstalk identification for spectrum management in broadband telecommunications systems |
AU2002246853A1 (en) * | 2000-10-19 | 2002-07-30 | Teradyne, Inc. | Method and apparatus for bridged tap impact analysis |
US6999504B1 (en) * | 2000-11-21 | 2006-02-14 | Globespanvirata, Inc. | System and method for canceling crosstalk |
US7010069B2 (en) * | 2000-12-04 | 2006-03-07 | Trellisware Technologies, Inc. | Method for co-channel interference identification and mitigation |
US7002930B2 (en) * | 2000-12-11 | 2006-02-21 | Texas Instruments Incorporated | Method of optimal power distribution for communication systems |
US6470047B1 (en) * | 2001-02-20 | 2002-10-22 | Comsys Communications Signal Processing Ltd. | Apparatus for and method of reducing interference in a communications receiver |
US20020172166A1 (en) * | 2001-03-22 | 2002-11-21 | Huseyin Arslan | Communications system and method for measuring short-term and long-term channel characteristics |
US20020141347A1 (en) * | 2001-03-30 | 2002-10-03 | Harp Jeffrey C. | System and method of reducing ingress noise |
US7009515B2 (en) * | 2001-04-11 | 2006-03-07 | Battelle Memorial Institute K1-53 | Frequency-hopping RFID system |
US7158563B2 (en) | 2001-06-01 | 2007-01-02 | The Board Of Trustees Of The Leland Stanford Junior University | Dynamic digital communication system control |
US7778550B2 (en) * | 2007-07-27 | 2010-08-17 | Tyco Electronics Subsea Communications Llc | System and method for wavelength monitoring and control |
-
2001
- 2001-06-08 US US09/877,724 patent/US7158563B2/en not_active Expired - Lifetime
-
2002
- 2002-05-31 EP EP02734610A patent/EP1396101B1/en not_active Expired - Lifetime
- 2002-05-31 WO PCT/US2002/017117 patent/WO2002100008A1/en active Application Filing
- 2002-05-31 DK DK12167376.8T patent/DK2533436T3/en active
- 2002-05-31 EP EP17172944.5A patent/EP3242420A1/en not_active Withdrawn
- 2002-05-31 CN CNB028149564A patent/CN100508432C/en not_active Expired - Fee Related
- 2002-05-31 JP JP2003501859A patent/JP4370418B2/en not_active Expired - Fee Related
- 2002-05-31 EP EP12167376.8A patent/EP2533436B8/en not_active Expired - Lifetime
- 2002-05-31 ES ES12167376.8T patent/ES2643690T3/en not_active Expired - Lifetime
- 2002-05-31 EP EP10178213.4A patent/EP2259456B1/en not_active Expired - Lifetime
- 2002-05-31 CN CN2006101628742A patent/CN101005323B/en not_active Expired - Fee Related
- 2002-05-31 KR KR1020037015756A patent/KR100893458B1/en not_active IP Right Cessation
-
2006
- 2006-12-08 US US11/636,316 patent/US8081704B2/en not_active Expired - Fee Related
-
2009
- 2009-05-08 JP JP2009113406A patent/JP2009189049A/en active Pending
-
2011
- 2011-11-22 US US13/302,522 patent/US20120063531A1/en not_active Abandoned
-
2012
- 2012-06-19 US US13/527,074 patent/US8681897B2/en not_active Expired - Fee Related
-
2013
- 2013-06-05 JP JP2013119199A patent/JP5735582B2/en not_active Expired - Fee Related
-
2014
- 2014-03-17 US US14/216,573 patent/US9160385B2/en not_active Expired - Fee Related
-
2015
- 2015-10-07 US US14/877,720 patent/US9843348B2/en not_active Expired - Fee Related
-
2017
- 2017-12-12 US US15/838,684 patent/US10404300B2/en not_active Expired - Fee Related
-
2019
- 2019-07-25 US US16/522,514 patent/US10938427B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5887034A (en) * | 1996-03-29 | 1999-03-23 | Nec Corporation | DS-CDMA multiple user serial interference canceler unit and method of transmitting interference replica signal of the same |
Cited By (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7356049B1 (en) | 2001-12-28 | 2008-04-08 | Ikanos Communication, Inc. | Method and apparatus for optimization of channel capacity in multi-line communication systems using spectrum management techniques |
EP1563614A1 (en) * | 2002-11-19 | 2005-08-17 | Telcordia Technologies, Inc. | Automated system and method for management of digital subscriber lines |
EP1563614A4 (en) * | 2002-11-19 | 2006-04-05 | Telcordia Tech Inc | Automated system and method for management of digital subscriber lines |
EP1429508A2 (en) * | 2002-12-13 | 2004-06-16 | Alcatel Canada Inc. | System and method for establishing a power level for a communication signal transmitted on a wired conductor |
EP1429508A3 (en) * | 2002-12-13 | 2008-05-07 | Alcatel Canada Inc. | System and method for establishing a power level for a communication signal transmitted on a wired conductor |
WO2004092911A2 (en) | 2003-04-14 | 2004-10-28 | Cisco Technology, Inc. | System and method for preventing phantom data communication links |
EP1614243A2 (en) * | 2003-04-14 | 2006-01-11 | Cisco Technology, Inc. | System and method for preventing phantom data communication links |
EP1614243A4 (en) * | 2003-04-14 | 2007-04-04 | Cisco Tech Inc | System and method for preventing phantom data communication links |
WO2005034459A1 (en) * | 2003-09-30 | 2005-04-14 | Siemens Aktiengesellschaft | Method for regulating the transmission parameters of broadband transmission channels assembled to form a group |
US7782889B2 (en) | 2003-09-30 | 2010-08-24 | Nokia Siemens Networks Gmbh & Co. Kg | Method for regulating the transmission parameters of broadband transmission channels assembled to form a group |
US9071534B2 (en) | 2003-12-07 | 2015-06-30 | Adaptive Spectrum And Signal Alignment, Inc. | DSL system estimation |
JP2012054972A (en) * | 2003-12-07 | 2012-03-15 | Adaptive Spectrum & Signal Alignment Inc | Dsl system estimation and parameter recommendation |
EP2259564A1 (en) * | 2003-12-07 | 2010-12-08 | Adaptive Spectrum and Signal Alignment, Inc. | DSL system estimation and parameter recommendation |
EP1548969A2 (en) * | 2003-12-25 | 2005-06-29 | Hitachi, Ltd. | Control and monitoring of a telecommunication system, and method of setting a modulation method |
EP1548969A3 (en) * | 2003-12-25 | 2009-03-18 | Hitachi, Ltd. | Control and monitoring of a telecommunication system, and method of setting a modulation method |
US7570748B2 (en) | 2003-12-25 | 2009-08-04 | Hitachi, Ltd. | Control and monitoring telecommunication system and method of setting a modulation method |
EP1839451A2 (en) * | 2005-01-14 | 2007-10-03 | SBC Knowledge Ventures L.P. | Method and apparatus for managing a quality of service for a communication link |
EP1839451A4 (en) * | 2005-01-14 | 2011-04-06 | Sbc Knowledge Ventures G P | Method and apparatus for managing a quality of service for a communication link |
CN101133564B (en) * | 2005-03-03 | 2012-06-27 | 适应性频谱和信号校正股份有限公司 | Method and device of DSL state and line profile control |
US7826338B2 (en) | 2005-09-21 | 2010-11-02 | Huawei Technologies Co., Ltd. | Method and apparatus for adaptive power adjustment based on reduction of cross-talk between DSLs |
EP1919093A4 (en) * | 2005-09-21 | 2008-12-10 | Huawei Tech Co Ltd | An adaptive power adjustment method and means based on reducing crosstalk among dsl lines |
EP1919093A1 (en) * | 2005-09-21 | 2008-05-07 | Huawei Technologies Co., Ltd. | An adaptive power adjustment method and means based on reducing crosstalk among dsl lines |
DE102006017245A1 (en) * | 2006-04-12 | 2007-10-18 | Infineon Technologies Ag | Data communication device e.g. personal computer, for communicating e.g. data, between subscriber connecting line and e.g. wireless local area network, has modulator modulating data based on discrete multitone transmission modulation method |
DE102006017245B4 (en) * | 2006-04-12 | 2012-11-22 | Lantiq Deutschland Gmbh | Data transfer device |
US7881219B2 (en) | 2006-04-13 | 2011-02-01 | Telefonaktiebolaget Lm Ericsson | Arrangement and method of configuring digital subscriber lines |
EP1863249A1 (en) | 2006-05-30 | 2007-12-05 | Huawei Technologies Co., Ltd. | Method and device for dynamic spectrum management of xDSL upstream and downstream shared frequency |
US8644870B2 (en) | 2008-11-21 | 2014-02-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Sum-rate balancing in wireless multicell and multicarrier system |
US8848555B2 (en) | 2008-11-27 | 2014-09-30 | Telefonaktiebolaget L M Ericsson (Publ) | Method and a system for management of transmission resources in digital communication systems |
WO2010064110A1 (en) * | 2008-12-01 | 2010-06-10 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for power allocation in a multicarrier system |
US8867712B2 (en) | 2010-05-12 | 2014-10-21 | Adtran GmbH | Adjusting a power allocation of users in a digital subscriber line environment |
WO2011141064A1 (en) * | 2010-05-12 | 2011-11-17 | Nokia Siemens Networks Oy | Adjusting a power allocation of users in a digital subscriber line environment |
EP2728820A3 (en) * | 2012-10-30 | 2016-07-06 | Lantiq Deutschland GmbH | Spectrum Management |
US9584181B2 (en) | 2012-10-30 | 2017-02-28 | Lantiq Deutschland Gmbh | Channel estimation |
US10033430B2 (en) | 2012-10-30 | 2018-07-24 | Lantiq Deutschland Gmbh | Spectrum management |
US10116350B2 (en) | 2012-10-30 | 2018-10-30 | Lantiq Deutschland Gmbh | Channel estimation |
EP2938095A1 (en) * | 2014-04-25 | 2015-10-28 | Alcatel Lucent | Full-duplex communication over a shared transmission medium |
WO2015162104A1 (en) * | 2014-04-25 | 2015-10-29 | Alcatel Lucent | Full-duplex communication over a shared transmission medium |
TWI565249B (en) * | 2014-04-25 | 2017-01-01 | 阿爾卡特朗訊公司 | Full-duplex communication over a shared transmission medium |
US10200167B2 (en) | 2014-04-25 | 2019-02-05 | Alcatel Lucent | Full-duplex communication over a shared transmission medium |
CN109101464A (en) * | 2018-07-13 | 2018-12-28 | 清华大学 | Based on the modified electric system sparse matrix Parallel implementation method and system of matrix |
Also Published As
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10938427B2 (en) | Dynamic digital communication system control | |
Ginis et al. | Vectored transmission for digital subscriber line systems | |
Song et al. | Dynamic spectrum management for next-generation DSL systems | |
US9425858B2 (en) | UPBO for vectored DSL | |
EP1894377B1 (en) | Dsl system loading and ordering | |
EP1583308B1 (en) | Semi-distributed power spectrum control for DSL communications | |
US9544423B2 (en) | Channel ordering for multi-channel multi-carrier communication systems | |
JP2017523699A (en) | Enhanced vectoring behavior with single loop unbundling | |
Cendrillon | Multi-user signal and spectra coordination for digital subscriber lines | |
Forouzan et al. | Dynamic bandplanning for vectored DSL | |
Chung | Dynamic Spectrum Management | |
Pandey | Resource Allocation in Modulation and Equalization Procedures in DSL Modems |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG UZ VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2003501859 Country of ref document: JP Ref document number: 1020037015756 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2002734610 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 20028149564 Country of ref document: CN |
|
WWP | Wipo information: published in national office |
Ref document number: 2002734610 Country of ref document: EP |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |