Research On Multicast Technology In Single Physical Layer User Platform Architecture

The existing IP network can not meet the requirement of high-speed integrated services, because IP network has too many layers in User-data Plane to be efficient and is difficult to guarantee Quality of Service (QoS). Although several QoS guarantee mechanisms, such as Differentiated Service, Integrated Service, and MPLS are proposed based on IP network, so far they are not so successful. This has spurred the activity of developing the Single User data Platform Architecture Network (SUPANET) at Sichuan Network Communication Technologies key Laboratory (SC-Netcom Lab). The SUPANET simplifies the user-data transfer platform (U-platform) into a single physical layer, which can greatly improve efficiency as well as QoS provisioning for user data in the U-platform while remains interoperable with existing Internet.Such network applications which characterize point-to-multipoint communication as distributed real-time multi-media data stream need the support of efficient multicast technology urgently. The core of multicast is routing, to be exactly, how to design or choose the right multicast routing algorithm and protocols is the key to solve the problem and the important means to guarantee QoS as well.Based on the research and analysis of existing dynamic multicast routing algorithms and protocols, by summarizing their shortcomings and their capabilities of QoS provisioning, an exploring research on multicast technology in SUPANET is carried out in this paper. Starting with the QoS features in user application data, the QoS-based dynamic multicast routing algorithm network model and the QoS-related restrictions is constituted, a new multicast routing algorithm SUPAMR which supports QoS in SUPANET is put forward and then a framework of SUPA Multicast Route negotiating Protocol (SUPAMRP) is designed, which defines the procedure of SUPAMRP and the information format. In addition, the reliability of multicast in SUPANET is discussed to some extent.OPNET is used to simulate SUPAMRP to validate its availability and efficiency by constituting a simplified SUPA network topology structure. The relevant simulation results of the multicast throughput, resource reservation and the control message of SUPAMRP indicate the validity of SUPAMRP whichbasically complies with the feature of multicast communication and the protocol work procedure.