Research On Resource Management And QoS-Oriented Multicast Techniques In Supanet

With proliferation of Internet in user number and in applications, network application data have evolved from texts to multimedia, data resources have expanded from humanbeings and computers to variety of intelligent physical objects; and distribution, virtualization, and service-orientation have become the main trend in network application development. All these have forced the Internet, built more than 30 years ago, to face with severe challenges in high-speed switching, insurance of quality of service (QoS), security/reliability/feasibility, and in mobility, which in turn call for Next Generation Internet (NGI). Unsuccessful attempt to build NGI merely with IPv6, majority of academic communities had realized that the crux of the problem for NGI lies in network architecture after Global Environment for Network Innovation (GENI) declared in 2006 that the Internet built more than 30 years ago became the main constraint for network development.The Sichuan Network Communication Technology Key Laboratory at Southwest Jiaotong University pioneered a research project on NGI architecture at the beginning of this century. It published its first NGI architecture, called 3D-EMAN for MANs in 2003 and SUPA (Single-layer User-data switching Platform Architecture) for backbone subnetworks in 2004. Later, it appeals to replace the OSI/RM with the new Open Network Application Service/Reference Model (ONAS/RM) and promotes a new development strategy called Backbone Substrate First, Outwards Extension Second (BSF-OES). With a re-clarified out-of-band signaling concept, the SUPA enables to separate the backbone subnetworks into two platforms:a single-layer User-data switching Platform (U-Platform) and a multi-layer S&M-Platform for Signaling and Management. The U-Platform, built on top of DWDM with a novel swiching technique called Ethernet-oriented Physical Frame Timeslot Switching (EPFTS), can provide a connection-oriented service for user-data of access networks (frames, packets, or application traffic) with secured, QoS insured, high-efficient and high-speed switching characteristics.The work presented in this thesis focuses on resource management in U-platform of SUPANET and on multicast technologies with an emphasis on assignment and tuning of transmission and switching resources and on QoS insured multicasting technologies. Main contributions of this thesis are as follows:First, network resource management technology is analysed, and quota allocation model (QAM) is proposed baesd on the type of traffic. Dynamic quota allocation based on EPFTS (DQAE) is also proposed which can dynamic allocation resources with different QoS acquirement.Second, quality of service deviation functionε(Q,θ) as an important measure which dynamic adjust quota is proposed combined QoS with resource reservation. Residual quota based dynamic adjustment algorithm (RQ-DAA) is also designed. The theoretical analysis and mathematical derivation prove that the algorithm have stability and effectiveness performance. Simulation results show that the dynamic allocation of quota can provide users with better QoS and more efficient use of network resources. Further studies show that combining SUPA virtual tunneling, DQAE mechanism can provide better QoS performance for end-users.Third, this thesis investigates a novel aspect of multicast techniques in SUPANET based on EPFTS features. Author also improved a network topology generation algorithm for multicast routing experimental.Fourth, multicast routing degree-constrained techniques based on EPFTS (MRDP) are designed which include two algorithms:MRDP-1 and MRDP-2. Those QoS-oriented algorithms have been proposed to cope with two application enviorments:sparse graph and dense graph. Algorithms can achieve the low cost building multicat tree and load balancing purposes using the delay performance and the ability of a balanced distribution of forwarding nodes in multicast tree as the target function.This dissertation shows that the techniques of network resource management and multicast routing technology based on EPFTS can guarantee the QoS of users and increase network reliability. The related research achievement of the thesis is practical to be implemented and has a reference value in SUPANET. Especially research results have important application value in improving reliability, availability in SUPANET.