Page 1 |
Save page Remove page | Previous | 1 of 174 | Next |
|
small (250x250 max)
medium (500x500 max)
large ( > 500x500)
Full Resolution
All (PDF)
|
This page
All
Subset |
OPTIMIZING INFORMATION QUERYING AND DISSEMINATION IN WIRELESS
NETWORKS
by
Joon Ahn
A Dissertation Presented to the
FACULTY OF THE USC GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(ELECTRICAL ENGINEERING)
August 2011
Copyright 2011 Joon Ahn
Object Description
| Title | Optimizing information querying and dissemination in wireless networks |
| Author | Ahn, Joon |
| Author email | joonahn@usc.edu;joonahn@alumni.usc.edu |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Electrical Engineering |
| School | Viterbi School of Engineering |
| Date defended/completed | 2011-06-21 |
| Date submitted | 2011-07-22 |
| Date approved | 2011-07-22 |
| Restricted until | 2011-07-22 |
| Date published | 2011-07-22 |
| Advisor (committee chair) | Krishnamachari, Bhaskar |
| Advisor (committee member) |
Silvester, John Govindan, Ramesh |
| Abstract | The recent advancement in semiconductor technologies brings more and more smart devices everywhere around us. Many emerging networks of such devices are envisioned to bring forward the era when we can gather information from everywhere, process them in real-time to make better decision on our activities, and tap into the necessary information from anywhere, whether at a standstill or moving around. In this dissertation, we consider two such promising networks — Wireless Sensor Networks (WSN) and Vehicular Networks — to see how they can effectively share the information they produce and consume. ❧ First, we investigate how to search efficiently for the interesting information generated by monitoring the physical world through WSNs and look into the implication of our findings. We derive mathematical models for communication costs in information sharing (through search and replication) and optimize the energy-wise communication costs when the WSN operates as a distributed database system. The optimization results are then used to reveal the scaling laws of the network in terms of energy requirements. ❧ As a second study we investigate how to effectively disseminate over a vehicular network the information (e.g. multimedia files) that a group of people want to consume while they are moving around in the vehicles. We consider a hybrid network of vehicles in which vehicles are equipped with two kinds of radios: a high-cost low-bandwidth, long-range cellular radio, and a free high-bandwidth short-range radio. We formulate an optimization problem to maximize content dissemination from central servers to vehicles within a predetermined deadline while minimizing the cost associated with communicating over the cellular connection. We mathematically analyze the dissemination process and derive a closed-form optimal solution. We also develop a polynomial-time algorithm to obtain the optimal discrete solution better suited for practice and verify our results using real GPS traces of taxis. |
| Keyword | querying; dissemination; optimization; performance analysis; wireless sensor networks; vehicular networks; trace-based simulation |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m |
| Rights | Ahn, Joon |
| Access conditions | The author retains rights to his/her dissertation, thesis or other graduate work according to U.S. copyright law. Electronic access is being provided by the USC Libraries in agreement with the author, as the original true and official version of the work, but does not grant the reader permission to use the work if the desired use is covered by copyright. It is the author, as rights holder, who must provide use permission if such use is covered by copyright. The original signature page accompanying the original submission of the work to the USC Libraries is retained by the USC Libraries and a copy of it may be obtained by authorized requesters contacting the repository e-mail address given. |
| Repository name | University of Southern California Digital Library |
| Repository address | USC Digital Library, University of Southern California, University Park Campus MC 7002, 106 University Village, Los Angeles, California 90089-7002, USA |
| Repository email | cisadmin@usc.edu |
| Archival file | uscthesesreloadpub_Volume71/etd-AhnJoon-151.pdf |
Description
| Title | Page 1 |
| Full text | OPTIMIZING INFORMATION QUERYING AND DISSEMINATION IN WIRELESS NETWORKS by Joon Ahn A Dissertation Presented to the FACULTY OF THE USC GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (ELECTRICAL ENGINEERING) August 2011 Copyright 2011 Joon Ahn |
Comments
Post a Comment for Page 1
