Abstract/Details

On delay -sensitive communication over wireless systems


2008 2008

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Abstract (summary)

This dissertation addresses some of the most important issues in delay-sensitive communication over wireless systems and networks. Traditionally, the design of communication networks adopts a layered framework where each layer serves as a “black box” abstraction for higher layers. However, in the context of wireless networks with delay-sensitive applications such as Voice over Internet Protocol (VoIP), on-line gaming, and video conferencing, this layered architecture does not offer a complete picture. For example, an information theoretic perspective on the physical layer typically ignores the bursty nature of practical sources and often overlooks the role of delay in service quality. The purpose of this dissertation is to take on a cross-disciplinary approach to derive new fundamental limits on the performance, in terms of capacity and delay, of wireless systems and to apply these limits to the design of practical wireless systems that support delay-sensitive applications. To realize this goal, we consider a number of objectives. (1) Develop an integrated methodology for the analysis of wireless systems that support delay-sensitive applications based, in part, on large deviation theory. (2) Use this methodology to identify fundamental performance limits and to design systems which allocate resources efficiently under stringent service requirements. (3) Analyze the performance of wireless communication networks that takes advantage of novel paradigms such as user cooperation, and multi-antenna systems.

Based on the proposed framework, we find that delay constraints significantly influence how system resources should be allocated. Channel correlation has a major impact on the performance of wireless communication systems. Sophisticated power control based on the joint space of channel and buffer states are essential for delay-sensitive communications.

Indexing (details)


Subject
Electrical engineering;
Computer science
Classification
0544: Electrical engineering
0984: Computer science
Identifier / keyword
Applied sciences; Delay-sensitive communication; Multiantenna systems; Resource allocation; User cooperation; Wireless networks
Title
On delay -sensitive communication over wireless systems
Author
Liu, Lingjia
Number of pages
134
Publication year
2008
Degree date
2008
School code
0803
Source
DAI-B 69/07, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780549721321
Advisor
Chamberland, Jean-Francois; Miller, Scott
University/institution
Texas A&M University
University location
United States -- Texas
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3321733
ProQuest document ID
304339575
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/304339575
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