基于动态频谱接入的载波聚合技术研究与实现

以LTE-Advanced系统为研究背景,提出了一种基于动态频谱接入技术的载波聚合方案(DSA-CA)。该方案的主要思想是使支持载波聚合技术的eNB根据小区的平均负载自适应地调节聚合的载波数量,从而达到合理利用频谱的目的。通过对基于动态频谱接入技术的载波聚合方案在LTE-Advanced 系统中的性能进行仿真研究,结果表明:DSA-CA方案与传统载波聚合方案(CA)相比,可使系统性能在一定程度上得到提高,尤其当一个小区处于高负载、另一个小区处于低负载时,DSA-CA方案的优势更加明显,此时高负载小区系统吞吐量得到明显提高,低负载小区的频谱效率也显著上升。

Research and Implementation of Carrier Aggregation Technology based on Dynamic Spectrum Access

With LTE-Advanced system as the research background, a DSA-CA (Carrier Aggregation based on Dynamic Spectrum Access) scheme is proposed. The main idea of this scheme is to adaptively adjust polymerized carriers amount in accordance with the average load of the cells at eNB in support of carrier aggregation technology, thus to achieve rational utilization of spectrum. The performance of carrier aggregation scheme based on DSA-CA in LTE-Advanced system is simulated and researched, and the experiment result indicates that compared with traditional CA scheme, DSA-CA improves system performance to a certain degree. Especially on the condition that one cell is at high loads and the other at low loads, DSA-CA scheme enjoys more obvious superiority, and the throughput of the high-loaded cell is obviously enhanced, while spectral efficiency of the low-loaded cell significantly raised.