NDLI: Cross-layer optimization for OFDM wireless networks-part I: theoretical framework

Content Provider	IEEE Xplore Digital Library
Author	Guocong Song Ye Li
Copyright Year	2002
Abstract	In this paper, we provide a theoretical framework for cross-layer optimization for orthogonal frequency division multiplexing (OFDM) wireless networks. The utility is used in our study to build a bridge between the physical layer and the media access control (MAC) layer and to balance the efficiency and fairness of wireless resource allocation. We formulate the cross-layer optimization problem as one that maximizes the average utility of all active users subject to certain conditions, which are determined by adaptive resource allocation schemes. We present necessary and sufficient conditions for utility-based optimal subcarrier assignment and power allocation and discuss the convergence properties of optimization. Numerical results demonstrate a significant performance gain for the cross-layer optimization and the gain increases with the number of active users in the networks.
Starting Page	614
Ending Page	624
Page Count	11
File Size	592989
File Format	PDF
ISSN	15361276
Volume Number	4
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	OFDM Resource management Wireless networks Throughput Multiaccess communication Fading Bridges Media Access Protocol Performance gain Pricing utility function Cross-layer optimization efficiency and fairness orthogonal frequency division multiplexing (OFDM) network
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Electrical and Electronic Engineering Computer Science Applications

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