Research On Resource Allocation Scheme Of Power Optical Fiber To The Home

In order to realize the interactive requirements of smart grid information,power fiber to the home(PFTTH)technology is used in more and more smart power consumption areas in China.By using optical fiber composite low-voltage cable,the optical fiber is laid with the low-voltage power line,and the same time when the power line enters the home,the optical fiber enters the home,avoiding the secondary laying of optical fiber and power line,and greatly reducing the cost of triple play.Therefore,the power fiber to home technology can not only realize the two-way interaction between the grid and users,but also the ideal choice to realize the integration of smart grid and three networks.Ethernet passive optical network(EPON)technology is an important means to realize the power fiber to the home networking.Different from the extensive application of EPON in the optical fiber system,the power fiber to the home system not only needs to provide voice,data,video and other Internet services for users,but also needs to carry the power business of users.In this paper,the business requirements of end users are analyzed in detail.Firstly,JTF-DBA algorithm for power business requirements is proposed.This algorithm focuses on two aspects:the upload delay of important events in power grid and the total time of information collection.After a brief introduction to the process of building OPNET simulation environment,the advantages of the algorithm in information collection time and important event upload delay of power grid are verified by OPNET simulation comparison.Next,this paper analyzes several key technologies and QoS problems of different services in EPON data link layer.Then we analyze and study the resource allocation algorithm based on adaptive cycle and the algorithm based on fixed cycle polling,and get the advantages of the algorithm used in this paper.In the aspect of queue scheduling,it is decided to adopt two-tier scheduling mechanism,which is carried out in OLT and ONU respectively.According to the characteristics of application environment in pftth,PRR+TSRR scheduling algorithm combination is used to schedule the bandwidth between services.It is verified that it is more effective than single scheduling mechanism.Finally,this paper introduces the design and implementation of power fiber to home passive optical network simulation system,including demand analysis,system function design and function display.The system mainly includes four modules:simulation foreground module,instruction processing feedback module,system service module and log module.Through the implementation of the system,users can set different parameters,select the algorithm to be simulated and view the simulation results through simple and convenient operation.