Title page for ETD etd-0521318109613220


Type of Document Master's Thesis
Author Fleming, Todd B.
URN etd-0521318109613220
Title Improving the Performance of the world Wide Web over Wireless Networks
Degree Master of Science
Department Electrical and Computer Engineering
Advisory Committee
Advisor Name Title
Davis, Nathaniel J. IV
Gray, Festus Gail
Midkiff, Scott F. Committee Chair
Keywords
  • wireless networks
  • WWW
  • MHSP
  • proxy
  • threads
  • protocols
Date of Defense 1996-11-04
Availability unrestricted
Abstract
The World Wide Web (WWW) has become

the largest source of Internet traffic, but it

was not designed for wireless networks.

Documents with large inline images take a

long time to fetch over low-bandwidth

wireless networks. Radio signal dropouts

cause file transfers to abort; users have to

restart file transfers from the beginning.

Dropouts also prevent access to documents

that have not yet been visited by the user. All

of these problems create user frustration and

limit the utility of the WWW and wireless

networks.

In this work, a new Wireless World Wide

Web (WWWW) proxy server and protocol

were developed that address these problems.

A client based on NCSA Mosaic connects to

the proxy server using the new protocol,

Multiple Hypertext Stream Protocol

(MHSP). The proxy prefetches documents to

the client, including inline images. The proxy

also reduces the resolution of large bitmaps

to improve performance over slow links.

MHSP provides the ability to resume file

transfers when the link has been broken then

reestablished.

The WWWW system was tested and

evaluated by running script-controlled clients

on different emulated network environments.

This new system decreased document load

time an average of 32 to 37 percent,

depending on network configuration.

Files
  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
  etd.pdf 156.24 Kb 00:00:43 00:00:22 00:00:19 00:00:09 < 00:00:01

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