完整后设资料纪录
DC 栏位 | 值 | 语言 |
---|---|---|
dc.contributor.author | 杨明翰 | en_US |
dc.contributor.author | Yang, Ming-Han | en_US |
dc.contributor.author | 张仲儒 | en_US |
dc.contributor.author | Chang, Chung-Ju | en_US |
dc.date.accessioned | 2014-12-12T02:43:17Z | - |
dc.date.available | 2014-12-12T02:43:17Z | - |
dc.date.issued | 2013 | en_US |
dc.identifier.uri | http://140.113.39.130/cdrfb3/record/nctu/#GT070160213 | en_US |
dc.identifier.uri | http://hdl.handle.net/11536/75444 | - |
dc.description.abstract | 由于细胞之间的干扰(iner-cell interference, ICI)是降低行动通讯系统效能的主要原因,许多方法已被提出来解决ICI问题。部分频率重复使用(FFR)是一种藉由使相邻的细胞边缘操作在不同的主频带来有效降低干扰的方式。协调式多点传输(CoMP)是藉由多个传输点同时服务一个使用者,使得原本的干扰转变为信号的方法。由于FFR是将频谱固定切成几个特定的附频带,如此的作法无法适应多变的细胞环境,因此我们提出藉由频率感知的方法来使频率重复使用具有弹性。即使有了上述的各种方法,我们还是需要一个好的资源分配(resource allocation)来使系统达到最大的吞吐量(Throughput)。 在本论文中我们提出了LTE-A系统下具弹性部分频率重复使用之效益导向多点传输资源分配机制。弹性部分频率重复使用(FFFR)是由FFR、CoMP以及频率感知。FFR与CoMP可有效处理ICI,配合频率感知则可进一步提高频谱使用效率。效益导向多点传输资源分配包含了效益函数(utility function)以及三个启发式演算法,其中效益函数的设计考虑了满足使用者的QoS需求、系统吞吐量最大化,以及有效率的传输点分配,最后藉由迭代执行三个启发式演算法,便可找到当下最佳的资源分配组合。 | zh_TW |
dc.description.abstract | Since inter-cell interference (ICI) is a main performance limiting issue in wireless cellular networks, several solutions are proposed to mitigate ICI problem. Fractional frequency reuse (FFR) is proposed to mitigate the cell edge ICI problem by making the adjacent cells operate in different subbands at cell edge. Coordinated multiple-point (CoMP) transmission can turn interference into signal by allowing multiple transmission points to transmit same signal to single user. Since FFR cannot adapt to the traffic variation, by spectrum sensing we can make the frequency reuse more flexible. Although there are several way to mitigate ICI, we still need a good resource allocation to maximize system throughput. In this thesis, we propose a flexible fractional frequency reuse (FFFR) strategy with utility-based multiple-point coordination resource allocation (UCRA) scheme. The FFFR strategy is formed by a conventional FFR, multiple-point coordination, and a CQI-based spectrum sensing technique. The conventional FFR and multiple-point coordination effectively mitigate ICI, and the CQI-based spectrum sensing improves spectrum efficiency. The UCRA scheme includes a well-designed utility function and three heuristic algorithms. The utility function considers QoS guarantee, throughput maximization, and efficient transmission point assignment. Three heuristic algorithms operate in an iterative approach to achieve the best resource allocation to the system. | en_US |
dc.language.iso | en_US | en_US |
dc.subject | 资源分配 | zh_TW |
dc.subject | 部分频率重复使用 | zh_TW |
dc.subject | 多点传输 | zh_TW |
dc.subject | Resource Allocation | en_US |
dc.subject | Fractional Frequency Reuse | en_US |
dc.subject | Multiple-Point Coordination | en_US |
dc.title | LTE-A系统下具弹性部分频率重复使用之效益导向多点传输资源分配机制 | zh_TW |
dc.title | A Flexible Fractional Frequency Reuse Strategy with Utility-Based Multiple-Point Coordination Resource Allocation in LTE-A Systems | en_US |
dc.type | Thesis | en_US |
dc.contributor.department | 电信工程研究所 | zh_TW |
显示于类别: | Thesis |