{"id":21,"date":"2019-12-05T04:53:30","date_gmt":"2019-12-04T20:53:30","guid":{"rendered":"http:\/\/47.94.221.113\/index.php\/thuxukegroup-home\/"},"modified":"2025-02-07T16:32:52","modified_gmt":"2025-02-07T08:32:52","slug":"home","status":"publish","type":"page","link":"http:\/\/thucsnet.com\/","title":{"rendered":"Home"},"content":{"rendered":"
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Leading Prof.<\/strong><\/h2>\r\n<\/td>\r\n

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Prof. <\/span>Ke\u00a0XU<\/span><\/u><\/a>\u00a0(<\/span>\u5f90\u606a<\/span><\/a>\u6559\u6388<\/a>)<\/span><\/strong>, Department of Computer Science & Technology, Tsinghua University.<\/span><\/span><\/span><\/div>\r\n

Research achievements<\/strong><\/h2>\r\n
\r\n\r\n1. Research\u00a0on\u00a0Evolvable\u00a0Internet\u00a0Architecture<\/strong><\/span><\/span>\r\n\r\nThere is a general consensus about the success of Internet architecture in academia and industry. However, with the development of diversified application, the existing Internet architecture is facing more and more challenges in scalability, security, mobility and performance aspects.\r\n\r\nWe proposed a novel evolvable Internet architecture framework to meet the continuous changing application requirements. The basic idea of evolvability is relaxing the constraints that limit the development of the architecture while adhering to the core design principles of the Internet. Three important design constraints used to ensure the construction of the evolvable architecture, including the evolvability constraint, the economic adaptability constraint and the manageability constraint, are comprehensively described. We consider that the evolvable architecture can be developed from the network layer under these design constraints. What\u2019s more, we believe that the address system is the foundation of the Internet.\u00a0<\/span>\r\n\r\nTherefore, we propose a general address platform which provides a more open and efficient network environment for the research and development of the evolvable architecture.\r\n<\/span>\r\n2.\u00a0Research on\u00a0the Scalable and Reconfigurable High-performance\u00a0<\/span>Routing and Switching Technology<\/strong><\/span><\/span>\r\n\r\nThis research presents a BGP implementing model based on the scalable routing and switching System, which has a higher speedup ratio compared with that of the previous proposals.\r\n\r\nIt proposes the function module division and system development method at three levels \u2013 sub-component, component and macro-component \u2013 based on the characteristic of routing and switching software. Compared with other methods, this one raises the code reuse proportion and efficiently reduces the routing system development cost. From this research, six patents of invention have been granted.\r\n\r\nThe scalable and reconfigurable high-performance router software platform has better compatibility, and provides developing and testing tools with higher performance efficiency compared with Cisco IOS system and MIT Click platform, respectively. The result helped win the Science and Technology of Electronic Information Award by the Chinese Institute of Electronics (first class) in 2012.\r\n\r\nThis software platform has been applied to routers of Bitway Networking Technology Co., Ltd., and adopted by network operators, such as CERNET2, China Telecom, and China Mobile, realizing desirable economic and social achievements. Many communication companies have also adopted this software when developing products or testing performance, including H3C, Ruijie Networks and Maipu Communication Technology Practical application by these companies shows \u201cthe application of this platform greatly improves development efficiency and accelerates research progress.\u201d\r\n\r\n3.\u00a0<\/strong>Research on P2P Network Traffic Classification & Management and<\/strong>\u00a0Live Streaming Technology<\/strong>\r\n\r\nThis research proposes a new P2P network traffic estimation model, which possesses higher estimation accuracy than the recently proposed gravity and independent connection model. A P2P network traffic classification method is proposed based on P2P networks\u2019 transmission behavior. This method has a simpler approach to classification with a higher success rate than the best result of previous classification methods proposed based on the Bayes\u2019 Theorem. The paper has been cited for ten times since it was published in\u00a0Computer Communications<\/em>. A cache replacement algorithm based on P2P network live streaming media is proposed; it has higher cache efficiency than the previous representative cache method based on segments.\r\n\r\nA node selection and a transmission scheduling method based on P2P network live streaming media are proposed, solving the problem that the traditional random selection method can hardly guarantee the transmission quality of streaming media and being granted two patents of invention. Based on this achievement, Prof. Xu\u2019s group and PPLive cooperated to develop and implement the cross-platform P2P video accelerator, PPVA. According to the measurement and statistics of the PPVA website, there have been 280 million times of downloading this software, which supports thousands of video web sites invisibly with more than 10 million on-line users downloading videos every day, effectively saving the network broad-band of video web sites and network operators.\r\n\r\n4.\u00a0<\/strong>Research on Internet Traffic Management<\/strong>\r\n\r\nNetwork multipath traffic management and optimal traffic engineering are studied based on Network Utility Maximization (NUM) theory, which leads to the\u00a0multipath traffic management method<\/span><\/a>\u00a0based on the logarithmic barrier method. The multipath traffic management method can realize theory optimization and convergence assurance simultaneously that the previous representatives, including TRUMP, can\u2019t achieve.\r\n\r\nA new load balancing in proportion method based on traffic engineering is proposed, getting a new conclusion that the optimal routing in load balancing in proportion is the routing with the shortest M\/M\/1 queuing delay. Based on this conclusion, the optimal traffic engineering can be realized through routing protocols designed to find the shortest path, such as OSPF, in network engineering.<\/span>\r\n\r\n<\/div>\r\n
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