Study on MMO in Visual Simulation Application - Advances in Image and Graphics Technologies - page 239

Study on MMO in Visual Simulation Application

Liang Qiang, Fan Rui, Xu Renjie, and Du Jun

Academy of Armored Forces Engineering, Beijing
[e-mail]

Abstract. MMO is the network communication mechanism that has been applied
in large scale network game. The related technology of MMO is quite mature,
and it has relative hierarchy. However, in the DIS visual simulation filed, with
the enlargement of simulation scale and the increasing of node, the load of
network is much greater than before, and it will decrease the real-time of the
real-time rendering at every node. In this essay, we will provide analysis of the
characteristic of data exchange in visual simulation, and exolain the technical
advantage of MMO on communication mechanism. Then we will present our
studies on how to effectively reduce the network load, enhance the virtual scene
real-time rendering the visual simulation, give a preliminary solution and con-
duct several proving experiment. Based on above mentioned reseach work, we
built the foundation on real-time data network interaction environment that can
be applied to large scale DIS visual simulation and be easily extended.

Keywords: MMO, DIS, Visual Simulation, Real-time and network load.

1 Introduction

Currently whether in the military DIS simulation training system or the application of
large scale network game, in order to get the best network simulation training effect and
the fluent visual game experience, the real time data interaction between every two
network nodes is very important and pivotal. There are many related technology rea-
lization mechanisms and methods that DIS and HLA are applied in military distributed
interaction simulation, and MMO (Massively Multiplayer Online) is the principal way
in the network game. As author's experience from some military distributed interaction
simulation training system indicates, when the simulation scale enlarges to 150~200
simulation node or more, it will appear rather serious transmitting delay and data lose, it
can't satisfy the real time need of the visual simulation of virtual scene rendering,
therefore it would affect the simulation training result. Relatively, MMO network game
always has more than 10 thousands or even several 100 thousands players online at the
same time, the direct experience of network transmitting real time of related game data
can be likely ensured.
In this essay, we analyze the causes that can decrease real time in military distri-
buted interaction visual simulation, study the application of MMO mechanism in DIS