Differentiated Services

Due to the increasing number of users of the Internet, the need for Quality of Service for the internet has increased. This has lead to the development of Integrated (or IntServ) and Differentiated (or DiffServ) Services as possible replacements to the Best Effort Service that is currently used in the Internet. The lack of scalability in the IntServ model has given rise to the popularity of the DiffServ model. Moreover, the initial performance results and ease of introduction into the current Internet scenario have favored the DiffServ model. Despite the advancement of research into DiffServ, they had been limited to the wired network. However, with the increase in mobile users, researchers are looking at ways of extending the wired DiffServ model to include mobile, wireless networks. This paper looks into the current research to expand the architecture and experimental framework to support DiffServ for wired as well as for mobile, wireless networks. _____________ _