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An Uplink Inter-Cell Interference Coordination Scheme Based on Multi-Cell Cooperative Scheduling

Author: ShenXue
Tutor: ZhangYingHaiï¼›WangWeiDong
School: Beijing University of Posts and Telecommunications
Course: Microelectronics and Solid State Electronics
Keywords: Long Term Evolution Packet Scheduling Interference coordination SLNR Collaboration area
CLC: TN929.5
Type: Master's thesis
Year: 2011
Downloads: 92
Quote: 0
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Abstract


LTE (Long Term Evolution, Long Term Evolution) is the the 3GPP organization of standardization of the next generation mobile communication network evolution scheme. LTE system will simplify the network structure, related to the air interface functions are concentrated in eNodeB (Enhanced-NodeB enhanced base station), Radio Link Control and MAC are in the same network node, which can be joint optimization and design . Radio access network greatly simplifies the core network of the future will be an all-IP network, and its structure is no longer vertical but flat spectrum of 20MHz to provide downlink 100Mbps. 50Mbps uplink peak rates; improve the cell edge user performance; improve cell capacity; reduce system latency; 100Km radius cell coverage; to support paired or unpaired spectrum, and can be flexibly configured 1.25MHz to 20MHz bandwidth. On the basis of the structure in the LTE system, the interference coordination and packet scheduling algorithm research, analysis of these algorithms have a problem. Scheduling, user letter stem-noise ratio as a measure of standard setting resource allocation priority in the district can achieve good performance, but the signal power would be adjacent cell interference caused thereby increasing the system cell intersymbol interference. In the interference coordination, most programs will the frequency of each cell is divided into two parts of the center and the edge to isolate the type of cell interference between the edge of the user can only use part of the frequency resources, resulting in part of the frequency resources is not sufficient to call, the frequency utilization The rate decreases. In this paper, on the basis of the existing interference coordination algorithm, uplink scheduling based on coordinated multi-cell interference coordination scheme. In this scheme, consider the uplink signal of the adjacent cell interference, using SLNR (Signal to the leakage plus Noise Ratio, the signal leakage to noise ratio) to measure the uplink interference situation presented in a group of cooperating set cell system resources allocated solution. Achieve the coordination of inter-cell interference signal in the scheduling algorithm on the basis of rational allocation of resources and user role. In this paper, MATLAB simulation tool, system-level simulation, the algorithm can be seen from the simulation results, interference coordination scheme based on collection of SLNR collaboration not only reduces the interference between cells, but also increases the system throughput and speeds up system performance.

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