Uma proposta de arquitetura de suporte para a qualidade de serviço orientada para aplicações de telemedicina

Abstract

This master s thesis proposes and evaluates a Quality of Service framework for telemedicine environments, supporting concurrent applications such as Video on Demand and Videoconference over an IP network infrastructure. IETF Differentiated Services (DiffServ) architecture for IP Quality of Service (QoS) is considered. More specifically, this study proposes the utilization of a Bandwidth Broker a network element responsible for IP QoS policy management, which receives dynamic allocation resources requests from Video on Demand and Videoconference applications, validates them against negotiated Service Level Agreements (SLAs) and allocates resources through configuration distribution of DiffServ mechanisms for routing network devices. This study specifies an integration solution at the control plane, between the digital video network and a policy management element the Bandwidth Broker, to make the dynamic allocation resources policy-based management possible. It also specifies and prototypes a Linux infrastructure for configuration support and validates results of DiffServ Quality of Service mechanisms implementation. For this purpose, different scenarios are considered simulating the concurrence of applications used in the scope of InfraVIDA a telemedicine project which integrates remote diagnosis and second medical opinion applications as well as a remote continuous education system for Health professionals, all based on the Internet. An evaluation of evolving tendencies in the field of IP Quality of Service Policy Based Management complements this study.