Abstract/Details

Algorithms and protocols towards energy-efficiency in wireless networks


2008 2008

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Abstract (summary)

A plethora of wireless technologies promise ubiquitous communication in the future. A major impediment to this vision is limited energy supply from batteries in these devices. Energy supply has far reaching implications on user experience as well as practicality of many envisaged applications. The energy consumed for radio communication in these devices is a major factor in the operating lifetimes of these devices. This calls for design of network protocols and algorithms that reduce energy consumption due to the wireless interface. In this dissertation we look at three emerging application scenarios of wireless networks and present our solutions to make radio communication energy-efficient in these scenarios.

We first look at the scenario of VoIP calls over wireless LANs where we propose an algorithm to reduce energy wasted in the idle mode of the wireless interface. We show that, in spite of the interactive, real-time nature of voice, energy consumption during calls can be reduced by close to 80% in most instances. Next, we consider the scenario of tag anti-collision protocols for radio frequency identification (RFID) systems and propose three protocols that reduce energy consumption due to packet collisions. We demonstrate that all three protocols provide 40-70% energy savings both at the reader and tags (if they are active tags). Finally, we consider topology control algorithms for wireless mesh networks that derive transmit power levels that prove to be energy-efficient. We propose a non-uniform model of gain for nodes using switched-beam directional antennas and develop algorithms for this model introducing antenna orientation as a parameter in topology construction. Through our evaluations, we demonstrate that 20-40% power level reductions are possible by our approach.

Indexing (details)


Subject
Electrical engineering;
Computer science
Classification
0544: Electrical engineering
0984: Computer science
Identifier / keyword
Applied sciences, Energy efficiency, Power-efficient communication, Wireless networking, Wireless networks
Title
Algorithms and protocols towards energy-efficiency in wireless networks
Author
Namboodiri, Vinod
Number of pages
172
Publication year
2008
Degree date
2008
School code
0118
Source
DAI-B 69/12, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780549916079
Advisor
Gao, Lixin
Committee member
Ganesan, Deepak; Gong, Weibo; Janaswamy, Ramakrishna
University/institution
University of Massachusetts Amherst
Department
Electrical & Computer Engineering
University location
United States -- Massachusetts
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3337020
ProQuest document ID
304567059
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/304567059
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