NDLI: A Generalized Gradient Scheduling Algorithm in Wireless Networks for Variable Rate Transmission

Content Provider	IEEE Xplore Digital Library
Author	Xiaolu Zhang Meixia Tao Chun Sum Ng
Copyright Year	2007
Description	Author affiliation: Nat. Univ. of Singapore, Singapore (Xiaolu Zhang; Meixia Tao; Chun Sum Ng)
Abstract	Average transmission rate and rate oscillation are two important performance metrics for most wireless services. Both are often needed to be optimized in multi-user scheduling and resource management. In this paper we introduce a utility function that increases with average rate but decreases with rate variance. It is capable of facilitating resource allocation with flexible combinations of the two performance metrics. A generalized gradient scheduling algorithm (GGSA) is then developed to maximize the proposed utility. It is shown that the best scheduler should maximize the sum of concave functions of instantaneous transmission rates in order to maximize the utility of average rate and rate oscillation. The scheduler reduces to the traditional gradient scheduling algorithm when the rate variance term in the new utility function is omitted. We analyze the dynamics of average transmission rates and rate variances using ordinary differential equation and show that GGSA is asymptotically optimal under the condition that the transmission rate vector, after an appropriate scaling, converges to a fixed vector as time goes into infinity.
Starting Page	3473
Ending Page	3477
File Size	727795
Page Count	5
File Format	PDF
ISBN	9781424410422
DOI	10.1109/GLOCOM.2007.659
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-11-26
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Scheduling algorithm Wireless networks Measurement Resource management Differential equations H infinity control Processor scheduling Analysis of variance Fading Base stations
Content Type	Text
Resource Type	Article

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