In current mobile broadband wireless access (BWA) technologies, which are based on orthogonal frequency division multiple access (OFDMA), terminals close to cell edge experience poor channel quality, due to severe path-loss and high interference from concurrent transmissions in nearby cells. To mitigate this problem we propose: (a) to partition the set of sub-channels into chunks, which are assigned different power levels; (b) the design of a data scheduling and allocation algorithm positioned in the medium access control (MAC) layer of the base station (BS), exploiting such a partitioning. The framework is analyzed in a multi-cell IEEE 802.16 network by means of system-level packet-based simulations, with detailed MAC and physical layer abstractions in combination with realistic models of the wireless channel and interference. (C) 2010 Elsevier B.V. All rights reserved.
|Autori:||Caretti M.; Cicconetti C.; Franceschini D.; Lenzini L.; Migliorini D.; Mingozzi E.; Rossi R.; Sabella D.|
|Titolo:||Efficient downlink scheduling with power boosting in mobile IEEE 802.16 networks|
|Anno del prodotto:||2011|
|Digital Object Identifier (DOI):||10.1016/j.comnet.2010.12.022|
|Appare nelle tipologie:||1.1 Articolo in rivista|