Research On Flexible Deployment Strategy Of Baseband Processing Functions In 5G Optical Transport Network

The future 5G mobile network will undergo revolutionary changes,not only to meet the needs of various application scenarios,but also to interconnect everything and create an era of wisdom.However,the traditional C-RAN network architecture is unable to meet the development needs of future networks in terms of bandwidth,capacity,delay,and networking flexibility due to the fully centralized static deployment of its wireless baseband processing functions.Therefore,the dynamic and flexible baseband processing functions deployment is an important evolution trend of future access networks.Therefore,the dynamic and flexible baseband processing functions deployment is an important evolution trend of the future access network.In addition,the RAN presents network characteristics in which optical network resources,radio resources,and computing resources coexist.Therefore,flexible deployment of baseband processing functions needs to be based on joint optimization of optical network resources,radio resources,and computing resources,thereby improving overall network performance and cost efficiency.This paper combines the flexible split of baseband processing functions and network function virtualization technology,conducts in-depth research on the deployment of baseband processing functions.The main work and innovations are as follows:Firstly,a multi-dimensional resource optimization model for flexible split of baseband processing functions is proposed.In this paper,the future 5G RAN architecture model based on functional split is studied.Based on the key issues of optical and radio resource deployment,a resource model based on functional split for radio processing and optical transmission is established.Based on the former model,a multi-objective integer linear programming model for flexible deployment of baseband processing functions is proposed.Flexible and efficient joint resource deployment in 5G RAN is achieved through collaborative optimization of optical network resources,radio resources and computing resources.Secondly,multi-dimensional resource joint optimization strategies for flexible deployment of baseband processing functions are proposed.In this paper,heuristic algorithms for adaptive deployment are proposed to minimize the number of resource processing pools in the network and to optimize the average transmission bandwidth of the base station service access network.The simulation results show that the algorithm for different optimization objectives can achieve the baseband processing functions deployment effect close to the corresponding ILP optimal scheme.Each functional module can be deployed flexibly and on-demand to the most suitable physical site according to the diversified needs,while ensuring network performance,saving system network costs.