FDD-LTE下行動態(tài)ICIC的研究與實(shí)現(xiàn)
[Abstract]:With the increasing demand for mobile services, providing faster and faster mobile communication rate has become the primary target of telecom operators, but 3G mobile communication can no longer meet the increasing demand for mobile communication services. In order to deal with this situation, LTE has become a good choice for telecom operators. It shows the direction of 4G evolution in the future. LTE system adopts OFDM technology, and the downlink data is transmitted simultaneously on multiple carriers, which can effectively suppress inter-symbol interference (ISI). That is, it can effectively solve the interference problem in the cell. However, the co-frequency network is the key to improve the spectral efficiency of LTE system, which makes the LTE system face more serious inter-cell interference problem. In this paper, the ICIC technology in LTE system is studied, and several scenarios of downlink interference are analyzed, and a downlink dynamic ICIC scheme is proposed. The feasibility of the scheme is verified by simulation and experiment. On the basis of discussing the necessity of ICIC technology in LTE system, this paper discusses the key problems of ICIC technology, including the analysis of downlink jamming scene, the definition of cell ICIC mode, neighborhood list and information exchange mechanism. By comparing and analyzing, we select an edge band coordination scheme, and then introduce the functional design of different layers of LTE protocol stack. The feasibility of the scheme is verified by performance simulation, and the performance effect of the scheme is preliminarily determined. The experimental results show that the LTE system with ICIC function can provide stable mobile communication service for the users at the edge of the cell. Effective suppression of cell interference.
【學(xué)位授予單位】:武漢郵電科學(xué)研究院
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TN929.5
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