Dynamic rate-control and scheduling algorithms for quality-of-service in wireless networks

Rapid growth of the Internet and multimedia applications, combined with an increasingly ubiquitous deployment of wireless systems, has created a huge demand for providing enhanced data services over wireless networks. Invariably, meeting the quality-of-service requirements for such services translates into stricter packet-delay and throughput constraints on communication. In addition, wireless systems have stringent limitations on resources which necessitates that these must be utilized in the most efficient manner. In this thesis, we develop dynamic rate-control and scheduling algorithms to meet quality-of-service requirements on data while making efficient utilization of resources. Ideas from Network Calculus theory, Continuous-time Stochastic Optimal Control and Convex Optimization are utilized to obtain a theoretical understanding of the problems considered, and to develop various insights from the analysis. We, first, address energy-efficient transmission of deadline-constrained data over wire-less fading channels. In this setup, a transmitter with controllable transmission rate is considered, and the objective is to obtain a rate-control policy for transmitting deadline- constrained data with minimum total energy expenditure. Towards this end, a deterministic model is first considered and the optimal policy is obtained graphically using a novel cumulative curves methodology. We, then, consider stochastic channel fading and introduce the canonical problem of transmitting B units of data by deadline T over a Markov fading channel. This problem is referred to as the "BT-problem" and its optimal solution is obtained using techniques from stochastic control theory.

Department dc:contributor.department

Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2007

Author dc:creator

• Zafer, Murtaza Abbasali, 1979-

Advisor dc:contributor.advisor

• Eytan Modiano.

• Electrical Engineering and Computer Science.

Statement dc:rights

• M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/42241
• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Identifier URI

http://dspace.mit.edu/handle/1721.1/42241

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/42241