An Implementation Of Embedded SNMP Agent In HFC Network Management System

With the rapid development of Internet technique,customers demand higher bandwidth and faster transmission speed of network,and the Internet based application have transferred from single service to integrated services,which provide the data,voice,image,and video services to the customers.Users Access Network,have become the bottleneck for the development of B-ISDN (broadband integrated services digital network)and information highway. Developing from the CATV network,the hybrid fiber/coaxial(HFC)network has a great deposit of bandwidth resources.HFC is a kind of access network which provides a more attractive and promising solution for the "last mile" connectivity to the home.Based on the developing prospect of the embedded network and the extensive application of network management based SNMP,this thesis simply analyzes the possibility of the application of such protocol in the HFC,a new type of residential Agent based on SNMP protocol is proposed.Then the platforms of hardware and software are constructed respectively.In the hardware design,the micro-processer LPC 2210 applying ARM7 coreasits CPU isused and the design of its peripheral circuits discussed.In the software design,first in order to provide the implementation of SNMP with software support in the bottom layer,an embeddedμC/OS-Ⅱoperation system is transplanted into the Agent.Then according to agent functional requirements and the "HFC network management system standard equipment",Agent is realized data collection, standard management information base(MIB),SNMP,a MAC layer and given the realizable program.At last programs are verified to be correct and realization through testing.