System Level Simulation Research On Ultra Dense Network Key Technologies

The development of 4G network has improved the service quality of mobile communication network. Compared with the third generation network, the performance of the fourth-generation network works much better on cell-edge user performance, cell capacity, latency handoff and so on. However, it can be easily predicted that in the future, people are more likely to use real-time video service, video phone service which both need lots of resource which can’t be satisfied nowadays. It’s clear that physical layer technologies can’t boost network capacity so much. Considered that the network architecture today can’t deal with exploding data traffic in the near future, the reasearh on new network architectures is necessary. Nowadays, many scholars and researchers have pay much attention on ultra dense networks.Based on the original macro cell network, adding new small cells on the network is an effecitive way to fulfill a new kind of architecture, which is easily to construct and costsaving. In the same time, the property of the architecture called “Heterogeneous Network”, needs futher study. Other problems of the new arthitrcture include interference, power consumption and so on.The main contributions of the paper are listed below:Firstly, a new channel model is proposed which is used for the future simulation. Property of the high-frequency wide-bandwidth channel in the real life was fully studied. Based on the data detected in the real life, the new channel model is convinced.Secondly, based on the LTE-A system-level simulation system, some key modules are improved, which is aimed to learn more about the property of 5G ultra-dense heterogeneous network.Thirdly, this paper proposes two clustering schemes. The new scheme is designed to solve the interference between small cells. The simulations results show that new schemes work better on network throughput than original clustering schemes.