Based On The Service Network Architecture Nic Services Research

In the computer network world, TCP/IP protocols have been the defacto standard. TCP/IP protocols are based on the layered network architecture. The architecture was designed as layers to simplify the complexity of the design. Layers have the functions of encapsulation, concealment and abstraction. As broad-band applications and multimedia applications have become the main usage of the computer network, technologies like real-time audio and vidio data transmission, quality of service (QoS) and network security have been emphasized. To insure Qos, Some new protocols as RSVP (resources reserved protocol), RTP (real time protocol), IEEE802.1D and DeffServ are appeared as mends in the TCP/IP protocols. The essential of the the prblem lies in the improper architecture.To overcome such limitations and improve poor network service efficiency, which is mainly due to the redundant function overlaps between neighbouring layers and complicated hierarchical processes existing in the conventional layered network, by analysing and classifying network services, a novel network architecture called the service unit based network architecture (SUNA) were presented. The SUNA is a brand new network architecture which is quite different from the current layered network architecture. It is easy to design and implement and has greater flexibility.This thesis illuminates the idea of SUNA, analyses the traits of SUNA, the definition of service units (SU) and services they provide. It also state the design of the prototype host including the definitions and functions of the modules. Based on these content, this thesis emphatically discusses NIC SU, presenting the characteristic and function of NIC SU. NIC SU is disassembled into three sub-modules to simplify design work: QoS flow-shaping sub-module, NIC virtual sub-module and network device driver sub-module. Each sub-module is studied deeply and discussed detailedly. At last the test for NIC SU and the whole network system is carried out both on functions and performance, and the test result prove that the theory and the design are both correct and reasonable.