Research On 5G Mobile Communication Network Slicing Technology And Design Of Medical Terminal

At present,mobile communication has entered the fully connected,all-digital 5G era,which not only redefines the connection of all walks of life and makes the interconnection of all things possible,but also accelerates the upgrading of all walks of life.Among them,5G introduces the concept of network slicing,which improves user experience rate,reduces latency,enhances mobility;and meets the diverse business needs of various vertical industries.Although the vision and goal of 5G network slicing are clear,there are still many unresolved issues in the research and application of its network architecture,enabling technologies,and application scenarios.This thesis then focuses on 5G network slicing technology applied to medical data transmission,and the main works are as follows:(1)Design an end-to-end network slicing system based on NFV/SDN enabling technologies.The design and construction of the system are based on three open-source software projects,namely Open Air Interface,Mininet,Ryu,and a universal software radio peripheral USRP B210.The system has a high degree of portability and flexibility,and basically realizes the software customization of network functions and the virtualization of network functions on the universal x86 architecture.It provides a set of open and novel solutions for further research on network slicing.Moreover,by customizing the wireless resource blocks of the access user on the e NB of OAI and customizing the forwarding of the queue on the Open Flow switch,the system realizes the differentiated resource allocation of the designed network slice;to meet the different requirements of Qo S.Through experiments,we tested the system’s differentiated transmission bandwidth of320～340kbps audio signal and 1500～2500kbps video signal.The results verified the effectiveness of the designed end-to-end network slicing system,which can alleviate the lack of open experimental platforms in the field of network slicing.(2)Design a medical terminal based on network slicing and Non-Orthogonal Multiple Access(NOMA)technology.Aiming at the diversified and non-interfering network transmission requirements of 4K medical video data and other medical data for medical terminals in the mobile hospital systems,a medical terminal was designed,and a NOMA slicing-based mobile hospital system was also designed and simulated for medical data transmission.It has a high guiding value for project realization.In the system,4K video data from patients is allocated to enhanced Mobile Broadband(e MBB)NOMA slice,and other medical data is allocated to ultra-Reliable and Low-Latency Communications(u RLLC)NOMA slice.Based on the system model and principle of NOMA,using joint optimal power allocation technique and Successful Interference Cancellation(SIC),to maximize each end user’s medical data throughput and system sum-throughput in both uplink and downlink.The simulation results show that under the optimal power allocation technique,the receiving medical data users can achieve high throughput in their respective slices,but the throughput of other users who send and receive ordinary data will be reduced.Hence,for all users’ fairness,truncated channel inversion is used for power allocation in the downlink,which successfully stabilizes the throughput of these users.