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EXPLICIT AIRTIME ALLOCATION FOR 802.11-BASED WIRELESS NETWORKS
by
Ki Young Jang
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
(COMPUTER SCIENCE)
December 2011
Copyright 2011 Ki Young Jang
Object Description
| Title | Explicit airtime allocation in 802.11-based wireless networks |
| Author | Jang, Ki Young |
| Author email | kjang@enl.usc.edu;story710+thesis@gmail.com |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Computer Science |
| School | Viterbi School of Engineering |
| Date defended/completed | 2011-06-14 |
| Date submitted | 2011-10-10 |
| Date approved | 2011-10-11 |
| Restricted until | 2011-10-11 |
| Date published | 2011-10-11 |
| Advisor (committee chair) | Govindan, Ramesh |
| Advisor (committee member) |
Golubchik, Leana Krishnamachari, Bhaskar |
| Abstract | Wireless technology has become an essential part of everyday life. The growth in the availability of wireless networks, the number of wireless devices, and the number of users leads to a stronger demand for better performance. However, the shared nature of the wireless channel among multiple transmitters makes it hard for wireless networks to provide fair, throughput-efficient and energy-efficient performance. ❧ In this dissertation, we explore how wireless channel resource management can help to improve performance in terms of fairness, throughput and energy-efficiency for 802.11-based wireless networks. Specifically, we investigate traffic management and energy management using explicit airtime allocation as a method of wireless channel resource management for multi-hop wireless mesh networks and centralized WLANs domains. ❧ We first introduce CNA, a lightweight mechanism that allows unmodified TCP to work efficiently in multi-hop wireless networks. CNA explicitly allocates the wireless channel resource represented by airtime to each active pair of communicating neighbors in a wireless neighborhood, so that it enables TCP to improve fairness and throughput while mitigating interference. ❧ Next, we present POLICE, a passive on-line method for determining the conflict graph in centralized WLANs. Accurate interference relationship inferred by POLICE enables designing an interference-aware traffic management with explicit airtime allocation for centralized WLANs. ❧ We also describe Snooze, an application-agnostic energy management technique for 802.11n. In Snooze, the AP monitors traffic on the WLAN and explicitly schedules airtime for each client, so that clients can sleep in order to improve energy-efficiency when they are not scheduled to use the wireless channel. |
| Keyword | 802.11; network; wireless |
| 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 |
| Contributing entity | University of Southern California |
| Rights | Jang, Ki Young |
| Physical access | 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@dots.usc.edu |
| Archival file | uscthesesreloadpub_Volume71/etd-JangKiYoun-325.pdf |
Description
| Title | Page 1 |
| Contributing entity | University of Southern California |
| Repository email | cisadmin@dots.usc.edu |
| Full text | EXPLICIT AIRTIME ALLOCATION FOR 802.11-BASED WIRELESS NETWORKS by Ki Young Jang 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 (COMPUTER SCIENCE) December 2011 Copyright 2011 Ki Young Jang |
