Network üzerinden kesintisiz video iletimi

Traditionally different types of traffic are not distinguished. Traffic suffers from increasing delay, packet loss and variable delay. In order to deal with these issues QoS (Quality of Service) schemes have been proposed. The primary goal is to provide a testbed and platform for investigating characteristics of real time internet traffic on heterogeneous networks. QoS techniques for transmission of real time video may be based on DiffServ (Differentiated Service) architecture. In the QoS testbed, this is implemented using an efficient bandwidth agent to allocate bandwidth, a Hiererchical Token Bucket queuing scheme at the output interface of routers, and a policing mechanism at the incoming of the edge switch. The characteristic of real time video traffic using MPEG-4 streaming and Telepresence devices are studied to that we will have a good idea what bandwidth and burst size is required to stream MPEG4 video through the QoS Diffserv domain. We use the testbed to investigate how real time streams behave in QoS scheme and provide a realistic recommendation to manage the available bandwidth for both the Q0S provider and clients. Test were conducted with Telepresence. From this test we observe that telepresence streaming require a certain size of burst to properly be transmitted.