  With the development of mobile technology, mobile virtual worlds have
attracted massive users. To improve scalability, a peer-to-peer virtual world
provides the solution to accommodate more users without increasing hardware
investment. In mobile settings, however, existing P2P solutions are not
applicable due to the unreliability of mobile devices and the instability of
mobile networks. To address the issue, a novel infrastructure model, called
Virtual Net, is proposed to provide fault-tolerance in managing user content
and object state. In this paper, the key problem, namely object state update,
is resolved to maintain state consistency and high interaction responsiveness.
This work is important in implementing a scalable mobile virtual world.
