Optimal Dynamic Spectrum Management Algorithms for Multi-User Full-Duplex DSL

Driven by the exceedingly high data rates achieved in single-user implementations, interest in a multi-user (MU) full-duplex (FDX) transmission for digital subscriber line (DSL) networks is surging. However, near-end crosstalk (NEXT) is no longer avoided in such networks, and hence, appropriate dyna...

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Vydáno v:IEEE access Ročník 7; s. 106600 - 106616
Hlavní autoři: Verdyck, Jeroen, Lanneer, Wouter, Tsiaflakis, Paschalis, Coomans, Werner, Patrinos, Panagiotis, Moonen, Marc
Médium: Journal Article
Jazyk:angličtina
Vydáno: Piscataway IEEE 2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
Algorithms
Balancing
Crosstalk
DSL
dynamic spectrum management
G.mgfast
Heuristic algorithms
Interference
multi-user full-duplex
Networks
Power cables
Radio spectrum management
Receivers
Resource allocation
Signal processing algorithms
vectoring
ISSN:2169-3536, 2169-3536
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Shrnutí:Driven by the exceedingly high data rates achieved in single-user implementations, interest in a multi-user (MU) full-duplex (FDX) transmission for digital subscriber line (DSL) networks is surging. However, near-end crosstalk (NEXT) is no longer avoided in such networks, and hence, appropriate dynamic spectrum management (DSM) techniques are needed. Therefore, this paper proposes three novel DSM algorithms for the MU FDX DSL network. First, an optimal spectrum balancing (OSB) algorithm is derived that calculates the globally optimal resource allocation but does so at an exceedingly high computational cost. The key to this algorithm is a novel multiple access channel broadcast channel (MAC-BC) duality for the specific case of perfect NEXT cancellation at the distribution point unit. The two low-complexity distributed spectrum balancing (DSB) algorithms are then proposed, for which simulations show that their performance is very close to what is achieved by the OSB algorithm. Therefore, these DSB algorithms can be used to estimate the achievable performance of an MU FDX DSL network. Such performance estimations show that the FDX transmission can indeed lead to significant gains in MU DSL networks as well.
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ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2019.2926616