Control of cable networks

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Issue Date
2012-12
Authors
Gao, Haihong
Advisor
Pendse, Ravi
Citation
Abstract

A major issue for contemporary cable networks under flat pricing is that heavy users can cause severe network congestion and light users subsidize heavy users. This problem is exaggerated when network participants do not obey the protocols. From the perspective of control theory, cable networks are primarily open-loop systems that assume the participants are non-strategic. The solution proposed in this research is to design a feedback (closed-loop) control system for cable networks using dynamic pricing. The goal of the control system is to make the regulation of cable networks automatic. The solution consists of three phases: modeling and analysis of cable networks, observer design of cable networks, and controller synthesis of cable networks. Each phase by itself tackles several challenges in the fields of computer networks, control theory, and mathematics. This research is intended to enhance bandwidth utilization efficiency, fairness, and security strength. The creation of an autonomic cable network involves two objectives:

  1. Devise a mechanism (protocol) to ensure that individual benefit is maximized, as well as social efficiency and fairness using a dynamic pricing scheme.
  2. Design a feedback (closed-loop) control system for cable networks. The proposed feedback control system for cable networks has some desired properties, such as controllability, stability, sub-efficiency, voluntary participation, incentive compatibility, simplicity, and practicability. The solution is validated by not only theoretic studies but simulations.
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Thesis (Ph.D.)--Wichita State University, College of Engineering, Dept. of Electrical Engineering and Computer Science
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