一种基于对象属性关注度的QoS传输控制方法  

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

作　　者：谢可[1] 梁晓辉[1] 赵沁平[1] 

机构地区：[1]北京航空航天大学计算机学院虚拟现实技术与系统国家重点实验室,北京100191

出　　处：《计算机学报》2009年第1期115-123,共9页Chinese Journal of Computers

基　　金：国家自然科学基金(60873159);教育部新世纪优秀人才支持计划;国家"八六三"高技术研究发展计划项目基金(2006AA01Z333);北京航空航天大学研究生创新实践基金资助~~

摘　　要：针对分布式虚拟环境中几何资源分配不均匀的问题,提出一种基于对象属性关注度的QoS传输控制方法以及模型传输QoS管理模型.该方法扩展了基于几何属性的模型传输控制传统方法,将对象几何属性与非几何属性综合作为传输中QoS控制参数,结合动态QoS控制的思想,针对分布式虚拟环境实时性要求较高的特点,在运行时刻考虑网络带宽对服务质量的影响,进行动态的QoS协商,并给出了一种针对该问题的动态协商算法.实验结果表明该方法能够全面反映用户对虚拟对象的关注程度,并随着网络带宽变化,在保证实时性的前提下更好地进行模型传输.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.

关 键 词：分布式虚拟环境 几何资源 实时性 虚拟对象属性 动态QoS控制 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]