Research On The Evolvability Of Internet Point-to-Multi-Point Transport Mechanism

The research for the new generation Internet(NGI) architecture has been undergoingfor years, with many achievements, but the important question as for how the Internetarchitecture research will move forward remains unsolved. According to our research, wethink that the development of the NGI architecture should take an “evolvable” approach:keeping Internet’s core design principles relatively stable, while cautiously changing thebasic elements that inhibit the development of Internet, in order to accommodate and tobetter support the requirements of new applications. This paper analyzes the definitionof the evolvability of Internet architecture as well as designing principles and evaluationmodels. We also propose a point-to-multi-point mechanism for the Transport Layer. Itcould be concluded that the current Internet architecture could evolve to our point-to-multi-point mechanism regarding its transporting mechanisms.The main contributions of this paper include:1) The paper analyzes the definition of the evolvable Internet architecture as wellas its designing principles and constraints. It also proposes a differential-equation-basedevaluation model for the evolvability of Internet architecture. It could be an importanttool to evaluate whether or not an architecture and its protocols are evolvable.2) The design of a point-to-multi-point mechanism for the Transport Layer. It en-ables the sharing of upload bandwidth among peers, thus improving the system’s overallefficiency and providing a working mechanism for high performance massive data trans-fer in the Internet. The modeling of the performance for the point-to-multi-point trans-porting mechanism is also proposed. It builds up a general model for Internet contentdelivery.3) Using the evaluation model for evolvability, this paper proves that the transportingmechanisms of the current Internet architecture could evolve to our point-to-multi-pointmechanism. It is demonstrated that this point-to-multi-point mechanism is more user-attractive than the C/S based networks as well as the traditional P2P networks, thus couldbe deployed gradually in currently used networks. Therefore, we could conclude that thecurrent Internet architecture is evolvable regarding its transporting mechanisms, especial-ly to our point-to-multi-point mechanism. 4) Performance optimizations for the point-to-multi-point mechanism of the Trans-port Layer are proposed in this paper. Methods such as linear programming and net-work flow algorithms are applied to calculate the minimum bandwidth of the server, andthe optimized scheduling algorithm for content delivery under the point-to-multi-pointmechanism is also introduced. As for larger scaled applications, fast approximate sched-ule algorithm is proposed. The effectiveness of these scheduling algorithms has all beentested through experiments. The performance optimizations provide a solid base for theevolvement of current Internet architecture to our point-to-multi-point mechanism.