The Research And Implementation Of HQoS In GPON System

In order to promote the development of national networks,China implemented the "triple play","broadband China" and other development strategies.SARFT proposed the "broadband radio and television","radio and television" and other action plans to speed up the construction of the cable television network infrastructure,promote the development of fiber to home,to enhance the network broadband speed,and improve network carrying capacity and enhance business services.With the rapid development of the telecommunications industry,and the rapid growth of network users,fiber access network as a bridge between the backbone network and users,faced with great opportunities and challenges.GPON(Gigabit Passive Optical Network)technology become a common solution in the fiber optic access network,because of its large bandwidth,transmission distance and high reliability.How to make full use of existing resources of GPON fiber access network equipment to add new types of business,while improving the quality of service for all businesses.The research of Qo S(Quality of Service)technology has become an important issue for operators and telecommunications experts.Traditional Qo S technology in the vicinity of the user's fiber access network,has been exposed to the user's business is not sensitive and other defects.According to the requirements of SARFT and operators,a company need to increase the Qo S function to solve the access network user service quality problems,in the GPON OLT(Optical Line Terminal)products.Aiming at the shortcomings of traditional Qo S technology in GPON system,this paper proposes a hierarchical scheduling model for GPON optical access network equipment,which is based on the existing IP network Qo S technology and HQo S layered theory.The GPON system is sensitive to the user.This paper mainly carry out research work from the following aspects.(1)Starting from the development trend of PON technology,the background and significance of the research and the research status at home and abroad are introduced,and the necessity of research and application of HQo S technology in GPON system is discussed.(2)The key technologies of GPON system and the key technologies of HQo S are studied,and the feasibility of HQo S technology in GPON system is analyzed.(3)In the access network,based on the traditional access network ONU business model,the paper designed and established a variety of business models in the GPON system,and designed to establish,traffic classification rules for the distinction Each of the users of the business flow in the access network equipment;to the business flow that has been classified in the access network equipment,using access control list for the specific business flow priority re-marking processing for the subsequent hierarchical scheduling to complete the pre-processing work;according to system operation needs,This paper completes the optimal deployment of scheduling algorithm and hybrid scheduling algorithm in GPON hierarchical scheduling system.Based on the detailed description of strict priority scheduling algorithm,weighted polling scheduling algorithm and hybrid scheduling algorithm implementation process,the paper achieved the HQo S function of a variety of user service flows.(4)The hierarchical scheduling model of the design and implementation is simulated by using the network analyzer to simulate the actual user scenario.And the test results show the validity and practicability of the model.Finally,according to the research contents of the paper,the optimization aspects of the research are are discussed,and a new research direction is obtained.