NDLI: Optimal transmission scheduling with base station antenna array in cellular networks

Content Provider	IEEE Xplore Digital Library
Author	Tianmin Ren La, R.J. Tassiulas, L.
Copyright Year	2004
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Maryland Univ., College Park, MD (Tianmin Ren; La, R.J.; Tassiulas, L.)
Abstract	We study the downlink scheduling problem in a cellular wireless network. The base stations are equipped with antenna arrays and can transmit to more than one mobile user at any time instant, provided the users are spatially separable. In previous work, an infinite traffic demand model is used to study the physical layer beamforming and power control algorithms that maximize the system throughput. In this paper we consider finite user traffic demands. A scheduling policy makes a decision based on both the queue lengths and the spatial separability of the users. The objective of the scheduling algorithm is to maintain the stability of the system. We derive an optimal scheduling policy that maintains the stability of the system if it is stable under any scheduling policy. However, this optimal scheduling policy is exponentially complex in the number of users which renders it impractical. We propose four heuristic scheduling algorithms that have polynomial complexity. The first two algorithms are for the special case of single cell systems, while the other two algorithms deal with multiple cell systems. Using a realistic multipath wireless channel model, we evaluate the performance of the proposed algorithms through computer simulations. The results demonstrate the benefits of joint consideration of queue length and dynamic base station assignment
Starting Page	1684
Ending Page	1693
File Size	716032
Page Count	10
File Format	PDF
ISBN	0780383559
ISSN	0743166X
DOI	10.1109/INFCOM.2004.1354580
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-03-07
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Base stations Transmitting antennas Antenna arrays Land mobile radio cellular systems Optimal scheduling Traffic control Scheduling algorithm Stability Downlink Cellular networks
Content Type	Text
Resource Type	Article
Subject	Computer Science Electrical and Electronic Engineering

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