Research On The Key Technologies Of LTE’s Further Evolution

With the development of science and technology, the wireless network plays an irreplaceable role in our daily life. Internet of things makes a lot of devices and terminals without any relationship access to the internet, and it also puts forward higher requirements and challenges to the throughput of the wireless network. For making users get a better mobile network experience, LTE-Advanced system came into being.This paper introduces the development of mobile networks, and then analyses the key technologies in LTE-Advanced system, including usage scenarios and protocol architecture of relay technology, classification of Coordinated Multiple Points Transmission and the realization of the joint scheduling, beamforming and spatial multiplexing of Multiple-Input Multiple-Output. Finally, it focuses on the carrier aggregation technology at the base of classification and scenarios.Based on the theoretical analysis, this thesis verifies the carrier aggregation technology on FDD frequency segments with Band1 and Band3 firstly. The peak rate can reach 275 Mbps, shows the feasibility of the carrier aggregation technology and the importance to the performance improvement. Then it verifies FDD and TDD carrier aggregation by using the real test environment, which is proposed in 3GPP Release 12. The actual test peak rate can reach 250 Mbps, this experimental test result shows that through the aggregation of different standard carriers can improve both the peak rate and the coverage of network, promote the throughput of LTE-Advanced system and enhance users’ perception.