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Research on Inter-Cell Interference Control for 3GPP LTE and Its Evolved Systems

Author: CuiYaZuo
Tutor: YangDaCheng
School: Beijing University of Posts and Telecommunications
Course: Communication and Information System
Keywords: LTE LTE-Advanced Interference Power Control Multi-cell joint scheduling
CLC: TN929.5
Type: Master's thesis
Year: 2010
Downloads: 183
Quote: 1
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Abstract


With the development of mobile communication, limited spectrum resources are the main factors that limit system performance, how to improve the spectral efficiency has long been a research focus. Is accompanied by the continuous development of WiMAX and other broadband wireless access technology with mature, HSPA technology can not meet the the future diversified multimedia business needs. In order to study the new network deployment structure, 3GPP Long Term Evolution (LTE) and LTE-Advanced, the subsequent evolution of the program, the two projects program in order to be more competitive in the future field of communication, not only to achieve 1Gbps/500Mbps (LTE-Advanced) peak rate, and the cell edge user data transfer rate is also guaranteed. To achieve the high spectral efficiency and high capacity target, interference is one of the urgent need to solve the main problem. LTE uses OFDM technology can provide the orthogonal sub-carriers, and to avoid the problem of interference within the cell. However, due to the limited spectrum resources, the inter-cell interference can not be avoided, and this inter-cell interference will be severely affected by the data rate of the cell edge, and therefore, must take effective measures to reduce this inter-cell interference. Discussed and analyzed by the iterative calculation and control program to apply to LTE macro cell, Home eNodeB, and applies to the interference of the LTE-Advanced system, respectively. Specifically, including the power control techniques in the study interference coordination technique, i.e. in the uplink / downlink, the UE / eNodeB for power control in the cell, so that the UE / eNodeB reach the the eNodeB / UE signal power reaches the necessary SINR of guarantee on the adjacent cell at the same time does not cause a lot of interference; soft frequency multiplexing / fractional frequency reuse, this method the frequency resources are divided into a plurality of collection of multiplexed using orthogonal frequency of the edge region in the set, inter-cell, thereby reducing the cell edge user interference; link technologies, including the scrambling, IDMA and hopping interference randomization techniques; receiver gain control of the home base station, and is used to alleviate the uplink interference caused by the UE no control on the HeNB, the process due to not reduce emission increased power HUE noise uplift; possible multi-cell LTE-advanced, centralized joint scheduling method for solving a linear equation, and simulation. Interference control technology, a more detailed study, to hope that the work done through this article to find the a suitable interference control program, and 3GPP legacy solutions, to be applied to a real network to provide reference.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Mobile Communications
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