Research On Service Flow's Classification And Forwarding Implementation In C-DOCSIS System

With the development of the convergence of telecommunication,Internet and broadcast networks,SARFT(State Administration of Radio,Film and Television)is developing the HFC actively,and it has proposed C-DOCSIS(Chinese Data over Cable Service Interface Specification)technology based DOCSIS3.0 standards.This technology is more suitable for Chinese existing television networks in the cast of costs,bandwidth requirements,and business management,etc.Recently,there are two options for the implementation of this technology,one is distributed resolution,in this resolution,business classification and forwarding and control functions of the system are achieved on the PON(Passive Optical Network).The other is centralized resolution,in this resolution,business classification forwarding and control functions are achieved in CMC(Coax Media Converter).The thesis is based on the centralized resolution,the function of service mapping and management is achieved in coax media converter.The key is how to achieve the mapping between CDT(C-DOCSIS Data Format Label)of the internal communication message in CMC and the service VLAN in the system.The SVLAN mapping is also an important innovation of the C-DOCSIS technology.The thesis mainly study implementation of service flow mapping based on SARFT standard.Furthermore,this thesis proposes a solution of business forwarding and classification based on terminals innovatively.Firstly,the thesis introduces the application of DOCSIS standard recently,and analyzes the significance of this subject.Then the message of C-DOCSIS system,service flow which is the core concept of system,and the overall implementation and key technologies of the system are described in this thesis.Furthermore,the thesis focus on the implementations of service mapping which is the core module.On the basis of the implementations of broadcasting standards' s SFR(Service Flow Reference)service mapping,and in order to provide users with more sophisticated management and conservation of ACL(Access Control List)resources,this thesis further expand the business flow mapping based on the type of terminals.Finally,testing environment are setted up to verify the performance of each business model and overall system,and the results achieved in this test demonstrate the feasibility of this solution.