Research On Slicing-based World-ground Integration Network Access And Core Network Resource Scheduling Technology

With the increasing importance of mobile communication services,people have an increasingly strong demand for online services at any time and any place.The integration of space and earth network integrates the original independent ground communication network and satellite communication network,which can effectively meet the needs of people online all over the world at any time.Because the integrated network needs to transmit various services,the traditional way of transmitting services of different service levels on the same physical network causes very low transmission efficiency and great waste of resources.Network slicing technology can create different subnets on the same physical resource through virtualization technology.Different types and different service levels of services can be transmitted independently in the subnets,which can effectively improve the efficiency of network services and the quality of user services.In view of the characteristics of more diverse services,the need to overcome the huge service delay of satellite system,and the drastic change of time-frequency resources in satellite access network,this paper focuses on the structure of network slice and the resource scheduling management technology of access and core network.Firstly,this thesis studies the E2 E network construction scheme based on Slicing Technology in the integrated space and earth network,which provides a network slicing implementation architecture to support flexible network deployment between satellite and ground.Then,the management technology for end-to-end network slicing is studied,including the design of key performance indicators(KPI),slicing deployment and slicing management.For the integrated core network of heaven and earth,the design and implementation of core network network slicing based on kubernetes verifies the feasibility of the kubernetes platform for network slicing.At the same time,according to the 5G slicing service signaling process,the world-ground integrated core network slicing service signaling process is derived,and at the same time,the response time of the slicing service is simulated with changes in resources to obtain the response time change of the world-ground integrated core network slicing service.Aiming at the resource scheduling of satellite access network,the resource management strategy based on request and decision is studied,and a resource management optimization strategy based on genetic algorithm is proposed.In this method,the access slice strategy is encoded into binary sequence to deal with the request and decision mechanism.Compared with the traditional method,it improves the access success rate.Finally,aiming at the integrated core network of heaven and earth,the design and implementation of core network Slicing Based on kubernetes is implemented,and the feasibility of applying kubernetes platform to network slicing is verified.