¡¡	Chinese Journal of Computers   Full Text
Title	Research on QoS in Next Generation Network
Authors	LIN Chuang WANG Yuan-Zhuo REN Feng-Yuan
Address	(Department of Computer Science and Technology, Tsinghua University, Beijing 100084)
Year	2008
Issue	No.9(1525¡ª1535)
Abstract &   Background	Abstract With rapid development of the network technology and application, Internet access and network application form become increasingly complex, heterogeneous and ubiquitous. The current network has revealed many inadequacies. And it is unable to satisfy Quality of Service(QoS) requirements. The current QoS architecture of Internet and related technologies can not adapt to the further development of the next generation of network applications. This paper focuses on the future direction of development of Internet, researches the challenges and the solving ideas of next generation network QoS from the network QoS architecture, real-time QoS, the integration Quality of Protection(QoP) and QoS, and the theory of QoS performance evaluation. Keywords Quality of Service(QoS); network QoS architecture; real-time QoS; Quality of Protection(QoP); performance evaluation Background This research is partly supported by the National Basic Research Program(973 Program) of China under grant Noª±2006CB708301, Scientific and Technological Innovation Nurture Funds Major Projects of MOE, P.R.C Noª±707005, the National Natural Science Foundation of China under grant Nosª±60673187, 60773138, NSFC & RGC under grant Noª±60218003, Microsoft-Tsinghua Collaborated Lab Funding, and Nokia Graduate Student Research and Innovation Funding. The Internet has been a fantastic success, but in many ways it is not meeting the QoS requirements of its users. The Internet has had a profound effect on the Internet¡®s ability in the past to evolve into possibly dominant networking technology today. The network is originally from the simple transmission of data to be transmitted data, voice, activities, still images of multi-media. So the Internet will focus on how to transfer the delay-sensitive business, such as voice, conference and real-time multimedia applications. Both IntServ and DiffServ can not provide effective QoS guarantee for users. In non-connected IP network, however, "do my best" business model is no longer suitable to the QoS requirements of next generation network. There are many challenges for the QoS in next generation network. This paper tries to give a survey of the research status of all the above issues, researches the challenges and the solving ideas of next generation network QoS from the network QoS architecture, real-time QoS, the integration Quality of Protection (QoP) and QoS, and the theory of QoS performance evaluation, and analyzed the development prospect of future Internet.