Progress in 6G Technology: A Short Review

With the ITU's approval of the new draft proposal recommendations within the IMT Framework document for the period beyond 2030, research has recognized that 6G mobile technology incorporates numerous enhancements in usage scenarios and capabilities. This paper presents a short review of the progress of 6G technological advancement, including its use cases, key performance indicators, innovations in network support technology, and several potential spectrum options. The review is developed based on primary literature, including the relevant ITU document that encompasses IMT 2030 usage scenarios (as of June 2023). In this paper, we try to define progress in research for new services related to 6G use cases. A simulation is conducted to offer an overview of the theoretical 6G capacity. The simulation for theoretical 6G capacity is based on the bandwidth of spectrum candidates between 100 MHz and 1000 MHz. For network support, we identify some requirements to support 6G networks, such as integrated access and backbone, integrated space and terrestrial networks, free-space optical networks, distributed cloud computing, and artificial intelligence. Finally, the paper will also delve into discussing the implications and challenges expected during the 6G implementation phase, including the fulfillment of the key performance indicator objectives and the key value indicator, which is divided into two main components: the first is growth, and the second is sustainability and efficiency domains.