Publication:
Design and test of the cross-format schema protocol (XFSP) for networked virtual environments

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Authors
Serin, Ekrem
Subjects
Networked Virtual Environments
Cross Format Schema Protocol (XFSP)
XML
XSD
SOAP
HLA
NPSNET-V
JXTA
XML Serialization;
Advisors
Brutzman, Don
Sullivan, Joseph
Date of Issue
2003-03
Date
March 2003
Publisher
Monterey, California. Naval Postgraduate School
Language
Abstract
A Networked Virtual Environment (Net-VE) is a distributed software system in which multiple users interact with each other in real time even though these users may be located around the world [Zyda 99]. Net -VEs gained first attention through a variety of DOD and Academic research projects. After release of the multiplayer game DOOM, the gaming industry captured the idea of interactive multiplayer games. Today there are many popular Internet-based multiplayer games available. Effective networking of diverse entities and systems is a common problem for Networked Virtual Environments. In order to communicate with other entities a variety of communication protocols are used. Historically these communication protocols are "hard coded" into the software system and all nodes that participate in the environment must identically implement the protocols to interact with others. These communication protocols require authoring and compiling by a trained programmer. When the compiling process is introduced to the networked virtual environment, it detracts the extensibility and dynamicism of the system. This thesis presents the design and development of a Networked Virtual Environment model that uses Cross Format Schema Protocol (XFSP). With this work we show that a networked simulation can work for 24 hours a day and 7 days a week with an extensible schema based networking protocol and it is not necessary to hard code and compile the protocols into the networked virtual environments. Furthermore, this thesis presents a general automatic protocol handler for schema-defined XML document or message. Additionally, this work concludes with idea that protocols can be loaded and extended at runtime, and can be created with different-fidelity resolutions, resulting in swapping at runtime based on distributed state.
Type
Description
Series/Report No
Department
Computer Science
Other Units
Identifiers
NPS Report Number
Sponsors
Funder
Format
xiv, 133 p. : ill. (some col.) ; 28 cm.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined
in Title 17, United States Code, Section 101. As such, it is in the
public domain, and under the provisions of Title 17, United States
Code, Section 105, is not copyrighted in the U.S.
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