5G Mobile Communication System Based on Cloud Wireless Access Network

In the context of the development of wireless communication, network access methods are also changing. Cloud-based wireless access networks are more suitable for the development of 5G mobile communication networks. Resource allocation methods based on backhaul link capacity have been studied to a certain extent In order to meet the service quality requirements of different devices, how to better implement load balancing under the new architecture is a very important topic. The purpose of this paper is to study the 5G mobile communication system on cloud wireless access network. Based on the C-RAN architecture, this paper designs an access strategy for channel selection based on the cloud cellular network topology, so that the 5G system can select appropriate access users when working, thereby improving the efficiency of cooperative communication. And for the poor system performance topology, the original access strategy is improved, so that the system has the best bit error rate performance. This paper analyzes the modeling and analysis of the existing LTE system in the scenario of massive device access. Based on the adaptive random access model, this paper proposes a feedback adaptive random access strategy, which can ensure that the throughput rate does not decrease under heavy load, while reducing the average access delay of the existing system. Experimental studies have shown that when AC-RACH and FC-RACH are used for random access, the normalized throughput rate is higher than that of RA-RACH. Especially when the arrival rate of user requests is getting higher and higher, the throughput rate of RA-RACH access will continue to decrease with the collision until it approaches zero.