LTE TDD-FDD混合组网中的载波聚合技术

Carrier Aggregation Technology in Development of TDD-FDD Networks

随着无线数据业务的爆发式增长,充分利用频谱资源提升网络容量已经成为无线通信产业面对的重要挑战。4G时代,整合TDD和FDD频谱资源,应用TDD-FDD载波聚合技术是发展混合组网技术路线中解决容量提升问题的重要解决方案。从载波聚合的概念、分类及应用场景入手,介绍了3GPP相关标准化进展,并对TDD-FDD载波聚合部署中的主载波选择问题从多个维度进行详细分析。

With the rapid development of data service requirements, fully utilizing spectrum to improve the capacity of network becomes a big challenge. In 4G network, organizing the spectrum of FDD and TDD with carrier aggregation technology is an important solution to deal with the capacity problem. The principle and standardization progress of TDD-FDD carrier aggregation was introduced. Meanwhile, PCC configuration, as the key issue of carrier aggregation, was also analyzed in many factors of spectrum efficiency, signally overheads, RTT as well as dih＇ficulty lbr terminal realization etc, which could be guidance for carrier aggregation deployment in development of combined FDD＋TDD Networks.