Research On Distributed Route Technologies For The CDN Networks--Research On Name-based Route Technologies

Despite the alluring promise of the Internet as the convergence channel for delivery of all types of media,it is obvious that there are many challenges that must be addressed to ensure consistent delivery to the end-user. New types of networks are being built to specifically address these needs - Content Delivery Network (CDN). The research subject of the dissertation is the key function layer of the CDN network --Route layer. From the point of the theoretical analysis and the computer simulation,the Name-based route technology of the CDN route system is thoroughly studied.Chapter 1 of the dissertation is an introduction. The background and system architecture of the CDN network are given. The significance of the investigation and the main topics of the dissertation are described. The skeleton of the paper is also introduced.In Chapter 2,the main function units of the INRP protocol for the CDN routing system based on content name are summarized,then several units are deeply studied. First,the user access flow of INRP protocol is discussed. Second,the frame architecture of INRP is introduced. Third,packet process is the kernel process of INRP and the tag which differs from DNS protocol,the dissertation has a deeply discussion here. Forth,the table-driven route algorithm is discussed,the longest-suffix match mode is proposed. Fifth,lookup latency is one large portion of total INRP route time,several lookup algorithms are analyzed,a few performance simulation results are also given. One improved INRP route simulation algorithm is proposed and the results are given.The Name-base Routing Protocol performs dynamic routing on content names. It is responsible for route table 's creation and updating. Chapter 3 covers NBRP protocol related problems. First,the properties of NBRP are introduced,the function of NBRP in route table 's creation and updating is also introduced. Second,the frame architecture and FSM of NBRP are discussed. Third,the dissertation shows route theory of NBRP,the NBRP route process based on route theory and protocol is detailed discussed. Forth,how to improve the NBRP performance is our research object,the route stability and security are analyzed.In Chapter 4,we discuss the system design of name-based routing system. First,the system architecture is given. Second,the main routing task is discussed and we list the system messages. Third,the function diagrams of NBRP and INRP are also given. We also give the sequence diagram of the main protocol message.Finally,the conclusion and epilogue are given. The main work of the dissertation is concluded. The fields of the CDN route system,which need to be studied deeply,are mentioned.