Advanced DSL management

Kerpez, K.J.; Waring, D.L.; Galli, Stefano; Dixon, J.L.; Madon, P.

doi:10.1109/mcom.2003.1232246

Cited by 35 publications

(25 citation statements)

References 6 publications

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“…Figure 2 illustrates the DSL copper impairments (Kerpez et al, 2003) (Starr et al, 2003), which are mainly loop and bridged tap loss, crosstalk, electromagnetic interference (EMI) radio ingress, impulse noise, harmonic distortion, and background noise.…”

Section: Dsl Copper Impairmentsmentioning

confidence: 99%

A Novel Probabilistic Approach for Analysis and Planning of Large Capillarity Broadband Networks Based on ADSL2+ Technology

Cardoso¹,

Santana²,

Rocha³

et al. 2010

Bayesian Network

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Section: Dsl Copper Impairmentsmentioning

confidence: 99%

A Novel Probabilistic Approach for Analysis and Planning of Large Capillarity Broadband Networks Based on ADSL2+ Technology

Cardoso¹,

Santana²,

Rocha³

et al. 2010

Bayesian Network

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“…The shaded region indicates the autonomous operation of the N modems to establish the local parameters such as PSD and bit allocation over sub-carriers. The center and modems only exchange the global parameters such as i M γ and i P , which makes MHM a Level-1 DSM technique [5]. All modems initially start at their maximum power constraint max P as in [6].…”

Section: Implementation In Current Dsl Scenariomentioning

confidence: 99%

“…Thermal noise and crosstalk fall into the category of capacity limiting noise and is effectively dealt with by Dynamic Spectrum Management (DSM) [4] techniques. Level-1 coordination [5] DSM schemes such as the game theoretic Iterated Water-Filling (IWF) [6] are most popular [4] [7], due to their predominantly distributed nature and significant rate enhancement from Static Spectrum Management (SSM) techniques.…”

Section: Introductionmentioning

confidence: 99%

Margin maximization in multiuser interference digital subscriber line channels

Panigrahi

Yang

Le‐Ngoc

2005

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005.

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Abstract-Multiuser margin maximization algorithms are developed for multi-carrier Digital Subscriber Loops (DSL) employing Dynamic Spectrum Management (DSM). Margin maximization is desirable for constant bit rate applications and provides protection against various non-stationary and bursty noise sources. Most single-user margin maximization algorithms rely on a fixed crosstalk assumption, which does not hold in DSM. Thus with direct extension of single-user algorithms in DSM scenarios, one user's margin maximization can lead to the failure of other users in meeting their target rates. In this paper, we explore the favorable monotonicity and fairness properties in multiuser margin and use them to formulate a box-constrained non-linear least squares (NLSQ) problem that can be solved by using a scaled gradient trust region approach with Broyden Jacobian update. This algorithm efficiently converges to a solution providing the best common equal margin to all users while explicitly guaranteeing that each user's target rate requirement is satisfied. The algorithm can be implemented in practical DSL-DSM scenarios with only Level-1 coordination.

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“…This realization has recently fueled intense research activity in Dynamic Spectrum Management (DSM) [6], [8], [20], which seeks to jointly optimize transmit spectra in order to minimize crosstalk, and hence to improve the achievable rates. Based on the required amount of coordination and centralized control, DSM techniques can be classified from Level 1 to Level 3 1 [7]. In Level 1, only macro parameters such as data rates, total transmit power, and margin are reported and controlled centrally and other micro parameters such as actual subcarrier-specific power and rate allocation are autonomously managed by each individual user modem in a distributed manner [7].…”

mentioning

confidence: 99%

“…Based on the required amount of coordination and centralized control, DSM techniques can be classified from Level 1 to Level 3 1 [7]. In Level 1, only macro parameters such as data rates, total transmit power, and margin are reported and controlled centrally and other micro parameters such as actual subcarrier-specific power and rate allocation are autonomously managed by each individual user modem in a distributed manner [7]. Level-1 DSM schemes are desired for their lowest requirements of coordination and centralized control, especially when multiple competing service providers share the bundle in current DSL scenarios.…”

mentioning

confidence: 99%

Multiuser margin optimization in digital subscriber line (DSL) channels

Panigrahi

Yang

Le‐Ngoc³

2006

IEEE J. Select. Areas Commun.

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Abstract-This paper presents efficient multiuser margin optimization algorithms suitable for multicarrier digital subscriber line (DSL) systems using Dynamic Spectrum Management (DSM). The favorable monotonicity and fairness properties of multiuser margin are employed to formulate a box-constrained nonlinear least squares (NLSQ) problem for multiuser margin maximization, which is efficiently solved by using a scaled-gradient trust-region approach with Broyden Jacobian update. Based on this NLSQ formulation, a multiuser harmonized margin (MHM) optimization algorithm for resource allocation is developed. A Newton-Raphson method is also developed for fast margin estimation and used within the MHM. The MHM algorithm converges efficiently to a solution for the best common equal margin to all users, while explicitly guaranteeing their target rate requirements. (This is the reason for the term harmonized.) Furthermore, its predominantly distributed structure can be implemented in DSL/DSM scenarios with only Level 1 coordination. Simulation results of various cases verify the convergence to the unique optimal solution within 5-10 iterations.Index Terms-Broyden update, digital subscriber line (DSL), dynamic spectrum management (DSM), iterated water-filling, loading algorithms, margin adaptive, trust region methods.

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Advanced DSL management

Cited by 35 publications

References 6 publications

A Novel Probabilistic Approach for Analysis and Planning of Large Capillarity Broadband Networks Based on ADSL2+ Technology

A Novel Probabilistic Approach for Analysis and Planning of Large Capillarity Broadband Networks Based on ADSL2+ Technology

Margin maximization in multiuser interference digital subscriber line channels

Multiuser margin optimization in digital subscriber line (DSL) channels

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