NDLI: Utility-based joint physical-MAC layer optimization in OFDM

Content Provider	IEEE Xplore Digital Library
Author	Guocong Song Ye Li
Copyright Year	2002
Description	Author affiliation: Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA (Guocong Song; Ye Li)
Abstract	In this paper, joint physical-MAC layer optimization in OFDM systems using adaptive modulation and subcarrier allocation is investigated based on utility theory. Since utility qualifies the level of users' satisfaction derived from the radio resources they occupy, it is ideal for a network optimization metric. We formulate the cross-layer optimization problem as one that maximizes the sum of the utilities over all active users through rate adaptation and dynamic subcarrier allocation with the limited radio resource and time-varying wireless channel constraints. Two effective subcarrier allocation algorithms with low complexity are proposed to solve the constrained optimization problem. Simulation results demonstrate the significant improvement of utility-based cross-layer optimization in OFDM.
Starting Page	671
Ending Page	675
File Size	343195
Page Count	5
File Format	PDF
ISBN	0780376323
DOI	10.1109/GLOCOM.2002.1188163
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-11-17
Publisher Place	Taiwan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fading OFDM modulation Resource management Utility theory Throughput Frequency Physics computing Adaptive systems Channel state information Constraint optimization
Content Type	Text
Resource Type	Article

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