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Efficient two-dimensional packing algorithms for mobile WiMAX / Andrea Lodi in Management science, Vol. 57 N° 12 (Décembre 2011) 

Public ISBD [article]  in Management science > Vol. 57 N° 12 (Décembre 2011) . - pp. 2130-2144 Titre : Efficient two-dimensional packing algorithms for mobile WiMAX Type de document : texte imprimé Auteurs : Andrea Lodi, Auteur ; Silvano Martello, Auteur ; Michele Monaci, Auteur Année de publication : 2012 Article en page(s) : pp. 2130-2144 Note générale : Management Langues : Anglais (eng) Mots-clés : Mobile  WiMAX  Two-dimensional  packing  Computational  complexity  Experimental  analysis Résumé : We present the result of research, developed within Nokia Siemens Networks, to solve the downlink sub-frame allocation problem in Mobile WiMAX (IEEE 802.16) technology in its full complexity, while simultaneously fulfilling real-life constraints on processing power and delay. We describe the IEEE 802.16 standard, and introduce two system models. A theoretical analysis of the two-dimensional packing problems originated by such models shows that they are both 𝒩𝒫-hard in the strong sense. From a practical point of view, the processing budget for scheduling in the base station was estimated to be 1 ms on a state-of-the-art PC. Thus, we introduce two highly efficient heuristics that were developed to handle the system practically. A thorough computational analysis of their optimization characteristics and a system-level evaluation in realistic scenarios proved that the algorithms offer significant capacity gain in Mobile WiMAX systems that translate to increased operator revenues. DEWEY : 658 ISSN : 0025-1909 En ligne : http://mansci.journal.informs.org/content/57/12.toc [article] Efficient two-dimensional packing algorithms for mobile WiMAX [texte imprimé] / Andrea Lodi, Auteur ; Silvano Martello, Auteur ; Michele Monaci, Auteur . - 2012 . - pp. 2130-2144. Management Langues : Anglais (eng) in Management science > Vol. 57 N° 12 (Décembre 2011) . - pp. 2130-2144 Mots-clés : Mobile  WiMAX  Two-dimensional  packing  Computational  complexity  Experimental  analysis Résumé : We present the result of research, developed within Nokia Siemens Networks, to solve the downlink sub-frame allocation problem in Mobile WiMAX (IEEE 802.16) technology in its full complexity, while simultaneously fulfilling real-life constraints on processing power and delay. We describe the IEEE 802.16 standard, and introduce two system models. A theoretical analysis of the two-dimensional packing problems originated by such models shows that they are both 𝒩𝒫-hard in the strong sense. From a practical point of view, the processing budget for scheduling in the base station was estimated to be 1 ms on a state-of-the-art PC. Thus, we introduce two highly efficient heuristics that were developed to handle the system practically. A thorough computational analysis of their optimization characteristics and a system-level evaluation in realistic scenarios proved that the algorithms offer significant capacity gain in Mobile WiMAX systems that translate to increased operator revenues. DEWEY : 658 ISSN : 0025-1909 En ligne : http://mansci.journal.informs.org/content/57/12.toc