LTE-Advanced系统载波聚合关键技术研究

发布时间：2019-03-10 21:14

【摘要】：随着移动互联网业务的飞速发展和终端设备的智能化,用户对于数据速率提出了更高的要求。LTE-Advanced作为第四代移动通信系统的主要技术标准,增加了载波聚合,增强MIMIO,多点协作传输,中继技术等多项关键技术来满足用户对数据速率的需求。载波聚合技术可以同时使用多个不同带宽的载波分量来提供更大的传输带宽,更高的数据速率和更低的时延,从而提供更好的用户体验。本文以LTE-Advanced网络为基础,重点研究载波聚合环境中无线资源管理方法,包括成员载波选择算法和RB分配算法。论文首先阐述了LTE-Advanced网络架构及其新增关键技术,重点介绍了载波聚合的技术特点,包括载波聚合的原理,聚合方式和部署应用场景。接着介绍了LTE-Advanced网络中无线资源管理方法和FemtoCell相关技术,以及FemtoCell技术对现有LTE-Advanced网络的影响。其次,论文针对双层网络部署的技术特点,提出了一种FemtoCell网络中基于动态分组的成员载波选择算法。算法充分考虑成员载波之间干扰和邻区的干扰,设计相应的求解算法,运用LTE-Sim开源软件开展仿真实验,分析算法的有效性和可行性。仿真结果表明,所提算法在一定程度上能够提高成员载波选择的效率。最后,论文进一步研究无线资源管理方法,提出了一种改进的RB资源分配算法,算法通过增加约束条件,将问题转化为整数线性规划问题。论文从算法复杂度,公平性等方面分析算法的可行性。通过和现有资源分配算法进行仿真对比,进一步验证算法的有效性。仿真结果表明,所提方案提高了系统性能和资源利用效率。
[Abstract]:With the rapid development of mobile Internet service and the intelligence of terminal equipment, users put forward higher requirements for data rate. As the main technical standard of the fourth generation mobile communication system, LTE-Advanced increases carrier aggregation and enhances MIMIO,. Multi-point cooperative transmission, relay technology and other key technologies to meet the needs of users for data rates. Carrier aggregation technology can provide greater transmission bandwidth, higher data rate and lower delay by using multiple carrier components of different bandwidth at the same time, thus providing a better user experience. Based on LTE-Advanced network, this paper focuses on the wireless resource management methods in carrier aggregation environment, including member carrier selection algorithm and RB allocation algorithm. In this paper, the architecture of LTE-Advanced network and its new key technologies are introduced firstly, and the technical characteristics of carrier aggregation, including the principle of carrier aggregation, the aggregation mode and the deployment application scenario, are emphatically introduced. Then it introduces the wireless resource management method and FemtoCell related technology in LTE-Advanced network, as well as the influence of FemtoCell technology on the existing LTE-Advanced network. Secondly, according to the technical characteristics of two-layer network deployment, this paper proposes a member carrier selection algorithm based on dynamic packet in FemtoCell network. The algorithm fully considers the interference between the member carriers and the adjacent region, designs the corresponding solution algorithm, carries out the simulation experiment with LTE-Sim open source software, and analyzes the validity and feasibility of the algorithm. Simulation results show that the proposed algorithm can improve the efficiency of carrier selection to some extent. Finally, the paper further studies the wireless resource management method, and proposes an improved RB resource allocation algorithm. By adding constraints, the algorithm transforms the problem into an integer linear programming problem. In this paper, the feasibility of the algorithm is analyzed from the aspects of complexity, fairness and so on. Through the simulation comparison with the existing resource allocation algorithm, the effectiveness of the algorithm is further verified. Simulation results show that the proposed scheme improves the system performance and resource utilization efficiency.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.5

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