Paper Info
Title
Seamless transition of power allocation in multi-user XDSL systems
Abstract
In non-static scenarios where Dynamic Spectrum Management (DSM) Level 2 is employed, an optimal power allocation can become invalid e.g. due to a joining user and thus has to be recomputed. To not unnecessarily interrupt service, the spectra should be updated successively as individual users start a new session. If not done carefully, this results in sub-optimal intermediate joint power allocations where the actual signal-to-noise ratio (SNR) margin of users decreases drastically. This paper investigates a novel approach to gradually update transmit spectra of modems to a new optimal power allocation while assuring that the actual SNR margin of all users does not fall below a specified value during the transition phase. Also, a low-complexity solution for the involved hard optimization problem is described. Simulations carried out demonstrate the interdependency between the minimum margin value and convergence time of the proposed scheme.
Year
Venue
Keywords
2010
Aalborg
digital subscriber lines,signal processing,dsm,snr margin,digital subscriber line,dynamic spectrum management,multiuser xdsl systems,optimal power allocation,optimization problem,seamless transition,signal-to-noise ratio,suboptimal intermediate joint power allocations,transition phase,transmit spectra,resource management,convergence,crosstalk,dsl,signal to noise ratio
Field
DocType
ISSN
Power margin,Interrupt,Resource management,Dynamic spectrum management,Computer science,Digital subscriber line,Signal-to-noise ratio,Real-time computing,Optimization problem,Multi-user
Conference
2219-5491
Citations 
PageRank 
References 
0
0.34
3
Authors
3
Name
Order
Citations
PageRank
Dominique Würtz100.34
Anja Klein223218.18
Martin Kuipers331.11