| Abstract
|
<p>We investigate a novel cross-laye … <p>We investigate a novel cross-layer optimization problem for jointly performing dynamic spectrum management (DSM) and periodic rate-scheduling in time. The large number of carriers used in digital subscriber lines (DSL) makes DSM a large-scale optimization problem for which dual optimization is a commonly used method. The duality-gap which potentially accompanies the dual optimization for non-convex problems is typically assumed to be small enough to be neglected. Also, previous theoretical results show a vanishing duality-gap as the number of subcarriers approaches infinity. We will bound the potential performance improvements that can be achieved by the additional rate-scheduling procedure. This bound is found to depend on the duality-gap in the physical layer DSM problem. Furthermore, we will derive bounds on the duality-gap of the two most important optimization problems in DSL, namely the maximization of the weighted sum-rate and the minimization of the weighted sum-power. These bounds are derived for a finite number of subcarriers and are also applicable to the respective problems in orthogonal frequency division multiplex (OFDM) systems. ©2010 IEEE.</p>plex (OFDM) systems. ©2010 IEEE.</p>
|
| Author
|
M. Wolkerstorfer +
, D. Statovci +
, Tomas Nordström +
|
| Conference
|
IEEE International Conference on Communications (ICC), Cape Town, South Africa, May 23-27, 2010
|
| DOI
|
http://dx.doi.org/10.1109/ICC.2010.5501818 +
|
| Diva
|
http://hh.diva-portal.org/smash/record.jsf?searchId=1&pid=diva2:588890
|
| HostPublication
|
2010 IEEE International Conference on Communications : ICC 2010 : 23-27 May 2010, Capetown, South Africa +
|
| PublicationType
|
Conference Paper +
|
| Publisher
|
IEEE Press +
|
| Series
|
IEEE International Conference on Communications +
|
| Title
|
Duality-gap bounds for multi-carrier systems and their application to periodic scheduling +
|
| Year
|
2010 +
|
| Has queryThis property is a special property in this wiki.
|
Publications:Duality-gap bounds for multi-carrier systems and their application to periodic scheduling +
, Publications:Duality-gap bounds for multi-carrier systems and their application to periodic scheduling +
, Publications:Duality-gap bounds for multi-carrier systems and their application to periodic scheduling +
, Publications:Duality-gap bounds for multi-carrier systems and their application to periodic scheduling +
, Publications:Duality-gap bounds for multi-carrier systems and their application to periodic scheduling +
, Publications:Duality-gap bounds for multi-carrier systems and their application to periodic scheduling +
, Publications:Duality-gap bounds for multi-carrier systems and their application to periodic scheduling +
, Publications:Duality-gap bounds for multi-carrier systems and their application to periodic scheduling +
, Publications:Duality-gap bounds for multi-carrier systems and their application to periodic scheduling +
, Publications:Duality-gap bounds for multi-carrier systems and their application to periodic scheduling +
|
| Categories |
Publication +
|
| Modification dateThis property is a special property in this wiki.
|
26 June 2014 03:44:30 +
|
