A Method Based on the Degree of Object Attributes Attention for Transmission QoS Control

Abstract

In Distributed Virtual Environment,it is an important issue that how to manage the distribution of 3D geometry.Instead of downloading the whole virtual world objects into the clients' machines,on-demand method is to copy only objects that the user needs-partial replication of a virtual world rather than full replication.Therefore,a key aspect is how to efficiently replicate the required data in real-time.To solve this problem,a QoS transmission control method and a QoS Management Model,which are based on the degree of object attributes attention,are given in this paper.This method extends the traditional geometry-based model transmission control method.Non-geometric attributes and geometric attributes are integrated together and regarded as QoS parameters.Because real-time property is the most important requirements in distributed virtual environment and it can be affected by network bandwidth during the run time,a dynamic negotiation algorithm,which combines the idea of dynamic QoS management,is given in this paper.Experimental results show that the method is able to reflect user's level of concern about virtual objects in virtual environment comprehensively,and it can gain better transmission results while ensuring the prerequisite of real-time with the changing of the network bandwidth.