02146nas a2200133   4500008004100000245008600041210006900127300001200196520158600208100002101794700002701815700002501842856014501867       2012                        eng d00aPerformance improvement of Distributed Virtual Environments by exploiting objects0 aPerformance improvement of Distributed Virtual Environments by e  a187-2033 aDistributed virtual environments need to address
issues related to the control of network traffic, resource
management, and scalability. Given the distributed nature
of these environments, the main problems they need to
overcome are the efficient distribution of workload among
the servers and the minimization of the communication
cost. In this direction, a lot of work has been done and
numerous relevant techniques and algorithms have been
proposed. The majority of these approaches mainly focus
on user entities and their interactions. However, most of
actual DVE systems include additional and non-dynamic
elements, denoted as objects, whose presence can affect
users? behavior. This paper introduces virtual objects?
attributes and proposes two approaches that exploit these
attributes in order to handle workload assignment and
communication cost in DVE systems. Both approaches
take into account scenario-specific aspects of DVE systems,
such as the impact that entities? attributes have on
each other and the way this impact can affect the system?s
state. These scenario-specific aspects are then combined
with quantitative factors of the system, such as workload,
communication cost, and utilization. The experiments
conducted in order to validate the behavior of the proposed
approach show that the incorporation of object?s presence
can improve the DVE system?s performance. More specifically,
objects? presence and their attributes can assist in
the significant reduction in the communication cost along
with effective workload distribution among the system?s
servers.1 aBouras, Christos1 aTsiatsos, Thrasivoulos1 aGiannaka, Eleftheria  uhttp://telematics.upatras.gr/telematics/publications/performance-improvement-distributed-virtual-environments-exploiting-objects?language=el