With increasing availability of spectrum in the market due to new spectrum allocation and re-farming bands from previous cellular generation networks, a more flexible, efficient and green usage of the spectrum becomes an important topic in 5G-Advanced. In this article, we provide an overview on the 3rd Generation Partnership Project (3GPP) work on flexible spectrum orchestration for carrier aggregation (CA). The configuration settings, requirements and potential specification impacts are analyzed. Some involved Release 18 techniques, such as multi-cell scheduling, transmitter switching and network energy saving, are also presented. Evaluation results show that clear performance gain can be achieved by these techniques.

翻译：随着新频谱分配和从上一代蜂窝网络频段重耕使市场可获取频谱资源日益增多，更灵活、高效和绿色的频谱利用成为5G-先进中的关键课题。本文概述了第三代合作伙伴计划（3GPP）在载波聚合（CA）灵活频谱编排方面的工作，分析了配置方案、技术要求及潜在规范影响，同时介绍了Release 18中的相关技术，如多小区调度、发射机切换和网络节能。评估结果表明，这些技术可显著提升性能增益。