SCALE: A Low-Complexity Distributed Protocol for Spectrum Balancing in Multiuser DSL Networks

Dynamic spectrum management of digital subscriber lines (DSLs) has the potential to dramatically increase the capacity of the aging last-mile copper access network. This paper takes an important step toward fulfilling this potential through power spectrum balancing. We derive a novel algorithm calle...

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Bibliographic Details
Published in:IEEE transactions on information theory 2009-08, Vol.55 (8), p.3711-3724
Main Authors: Papandriopoulos, J., Evans, J.S.
Format: Article
Language:English
Subjects:
Aging
Algorithms
Applied sciences
Bandwidth
Communications networks
Copper
Crosstalk
Data transmission
Digital
Digital subscriber line
DSL
dynamic spectrum management
Dynamics
Exact sciences and technology
Information theory
Information, signal and communications theory
interference channel
Iterative algorithms
iterative water-filling
Management
Message passing
Multiuser systems
Networks
Optical fiber cables
Optical fiber networks
Organization, operation and development plans
Protocols
Radio spectrum management
Radiocommunications
Subscriber line
successive convex optimization
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
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Summary:Dynamic spectrum management of digital subscriber lines (DSLs) has the potential to dramatically increase the capacity of the aging last-mile copper access network. This paper takes an important step toward fulfilling this potential through power spectrum balancing. We derive a novel algorithm called SCALE, that provides a significant performance improvement over the existing iterative water-filling (IWF) algorithm in multiuser DSL networks, doing so with comparable low complexity. The algorithm is easily distributed through measurement and limited message passing with the use of a spectrum management center. We outline how overhead can be managed, and show that in the limit of zero message-passing, performance reduces to IWF.
ISSN:0018-9448
1557-9654
DOI:10.1109/TIT.2009.2023751