Research On Universal Stream Adaptation Technology In SUPANET

The background of the work presented in this thesis is Single physical layer User-data transfer & switching Platform Architecture (SUPA) introduced by Sichuan Network Communication Key Laboratory (SC-Netcom Lab) to meet the needs of QoS for future merged networks. SUPA 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.This thesis focuses on universal data stream adaptation between upper layer and Ethernet-oriented Physical Frame (EPF) sublayer in SUPA with regard to data formats.The goal of adaptation issues is to make different upper data be encapsulated or decapsulated indistinguishably between upper layers and EPF sublayer in order to improve efficiency of data transmission. By mean of Ethernet-oriented Physical Frame Timeslot Swtiching (EPFTS), EPF can be switched at high speed in physical layer via Virtual Lines (VLs).After intensive analysis, the potential data flow in SUPANET can be classified into 8 groups. The rule of flow classification is dynamic. The data of every group can map into a priority. In order to fit with the dynamic rule of flow classification, the rule of priority mapping is also dynamic. Based on the research of flow classification and priority mapping, a universal stream adaptation model has been set up.In the model of adaptation, the stream adaptation layer is divided into two sublayers: Adaptation Service Provide Sublayer (ASPS) and Physical Frame Encapsulation Sublayer (PFES). The main function of ASPS is providing different adaptation service for different upper layer entities. Accroding to the difference of upper layer entities' requests, the adaptation service is divided into three type of services, ie, control-oriented service, user-oriented service and relay-oriented service. Additionally, a field named type is added in the header of EPF in order to mark the type of payload.Finally, OPNET network simulation software is used to validate the feasibility of the adaptation model. A topology network environment is set up by means of OPNET Modeler. In the simulation model, the whole work processes of three services are simulated. Furthermore, a multi-queue simulation model is set up. The link utilization of multi-queue model is collected based on different inputs shows that the captity of adaptation model discussed in this paper can be validated.