NDLI: Autonomous uplink intercell interference coordination in OFDMA-based wireless systems

Content Provider	IEEE Xplore Digital Library
Author	Kafafy, M.B.S.A. Elsayed, K.M.F.
Copyright Year	2013
Description	Author affiliation: Dept. of Electron. & Commun. Eng., Cairo Univ., Giza, Egypt (Kafafy, M.B.S.A.; Elsayed, K.M.F.)
Abstract	The inter-cell interference (ICI) problem in OFDMA-based wireless systems becomes a major impediment to attaining high rates particularly for cell-edge users in reuse-1 systems. Interference mitigation techniques attempt to combat ICI by using proper resource allocation schemes. Using centralized algorithms is not practical, particularly in HetNet environments, as these algorithms require intensive signaling, interference, and channel state information that may not always be practically available. In this paper, we present a framework for autonomous uplink ICIC in OFDMA-based wireless systems. The framework is based on imposing an overall interference limit for each cell. We use the proportional fair algorithm for resource block assignment and the power allocation problem is formulated as a maximization of the sum of the signal to leakage and noise ratio (SLNR) subject to the cell interference on other cells below a certain threshold. We propose a suboptimal closed form method, and an iterative allocation using Newton's method. These schemes do not need coordination between the cells where the resource allocation can completely be performed autonomously. Simulations show that relaxing the interference constraints improves the performance of the two proposed algorithms which exhibit better performance than the trivial equal power allocation. Comparison with a centralized scheme that uses global information shows good performance with acceptable degradation in the spectral efficiency which decreases as the interference limit increases.
Starting Page	288
Ending Page	295
File Size	439138
Page Count	8
File Format	PDF
e-ISBN	9783901882548
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-05-13
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	IFIP
Subject Keyword	Lagrangian Noise Interference Newton's method Log-barrier method Resource management Mathematical model Uplink Optimization Equations Complementary Slackness
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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