|dc.contributor.author||Welch, Donald J.||en_US
|dc.description.abstract||A distributed virtual environment may be required to reconfigure itself to
compensate for various conditions that can occur during execution. An
example is the reentry of a virtual environment that was previously
reconfigured out of the distributed virtual environment due to failure.
If there is a human user of this virtual environment, care must be taken
to insure that he is brought back into the distributed virtual environment
in a way that makes sense. He cannot regain control of a tank that is out
of ammunition while a computer-based simulation controls actively
The compensating reconfiguration function of a distributed virtual
environment must detect conditions that dictate reconfiguration. It must
determine the proper course of action and act on it, bringing the
distributed virtual environment to a stable state as quickly as possible.
Proper reconfiguration of a distributed virtual environment requires that
the compensating reconfiguration software know the system configuration,
the virtual state, and the mapping between them.
Building compensating reconfiguration software using traditional means is
laborious and error prone. A rule-based tool that uses abstract views of
the distributed virtual environment is a better way to produce
compensating reconfiguration software. To show the viability of this
approach I have developed a rule-based tool called Bullpen. This research
compares Bullpen against manual coding in a case study that ranges over a
wide array of requirements changes.
The results of this case study show that using Bullpen to build
compensating reconfiguration components is superior to manually building
the software in the kind of environments most commonly found in the
military DVE domain. Using Bullpen takes less effort and is less complex
than using manual programming techniques. The resulting component is less
error prone and has acceptable reaction time.
(Also cross-referenced as UMIACS-TR-98-18)||en_US
|dc.relation.ispartofseries||UM Computer Science Department; CS-TR-3886||en_US
|dc.title||Building Self-Reconfiguring Distributed Virtual Environments||en_US
|dc.relation.isAvailableAt||Digital Repository at the University of Maryland||en_US
|dc.relation.isAvailableAt||University of Maryland (College Park, Md.)||en_US
|dc.relation.isAvailableAt||Tech Reports in Computer Science and Engineering||en_US
|dc.relation.isAvailableAt||UMIACS Technical Reports||en_US