QoS adaptation in distributed multimedia based collaborative environment

Powerful end systems of distributed multimedia based application in high speed collaborative environment interact for different types of applications which need adaptation of best Quality of Service (QoS) configuration. For this issue we propose a QoS management framework for multimedia application mainly for the domain teleteaching which supports the dynamic choice of configuration as per user requirements and changes of underlying network topology. We specially focus on the bandwidth reallocation scheme for every multimedia service for a particular synchronous session. We concentrated on QoS negotiation and adaptation mechanism using Diffserv and the simulation result using Qualnet Network Simulator.