QoS-based Adaptive Access Control in Collaborative Virtual Enviroment

Collaborative virtual environment (CVE) is a multi-user virtual environment that supports distributed collaboration. The two main issues that CVE is facing are how to improve system scalability and quality of service. Combining Active routing and content-based publish/subscribe and taking bi-directional shared multicast tree as the communication structure of Interest Management, Active interest management (AIM) can effectively improve system scalability. However, due to the lack of network monitoring, it can only provide same services, and consequently cannot guarantee services and alleviate system workload when it gets saturated. In this paper, we propose a QoS-based Adaptive Access control (QAAC) approach which includes dynamic system delay maintenance, active router verification and host low start. By QAAC, we dynamically control the access of hosts based on network status to improve services and scalability in AIM. Finally, experiment results show that this approach can stabilize network traffic, reduce system load and provide better collaboration services.