Research On Shared-Memory Based NISO-MEFS

The background of this dissertation is the research work aiming for Next Generation Internet, i.e. SUPA (Single User-data transfer & switching Platform Architecture) and its core switching technique EPFTS (Ethernet-oriented Physical Frame Timeslot Switching), carried out at Sichuan Network Communication Key Laboratory (SC-Netcom Lab). The key of realization of SUPA and EPFTS lies in switching techniques and switch fabric, which are suitable for high-speed switching in multi-port switches and capable of providing required Quality of Service (QoS). The work related to "shared-memory based NISO-MEFS" presented in this dissertation aims at possible techniques in memory management so as to realize the N-Input- Single-Output Multiplexed Express Forwarding Structure (NISO-MEFS) based shared memory approach.The contribution of the author presented in this dissertation can be summarized as:A. Explored the potential prospect to apply shared memory approach in EPFTS based on typical switch fabric and queuing models.B. Presented a design for high-speed EPFTS switches with shared-memory approach through analysis of shared-memory techniques in the perspective of EPFTS requirement.C. Introduced a new memory management scheme called MMA-PMS (Minimal Memory-space Assignment Combined Partial Memory Sharing) , which ensures that data loss rate for traffic with the highest priority can be as low as possible with different bursting pattern even at heavy load condition. Simulation results of typical memory management schemes (Complete partitioning, fully sharing, and partial sharing) and MMA-PMS have shown the priority of MMA-PMS scheme over existing ones. This scheme has provided a favorable technique for EPFTS switches, where QoS provisioning is based on priorities.D. Proposed a framework for NISO-MEFS with shared memory approach with the results above and verified its operability to some extent.