< Key Hightlight >

Over the past decade, the operation of 3GPP-based cellular networks in unlicensed spectrum has gone from being a perennial talking point to what is now a key element of mobile network densification strategies. Mobile operators across the globe are increasingly rolling out LTE RAN (Radio Access Network) infrastructure operating in unlicensed spectrum – primarily the globally harmonized 5 GHz band – to expand network capacity and deliver higher data rates, particularly in dense urban environments. These implementations are largely based on LAA (Licensed Assisted Access) technology which aggregates unlicensed channels with anchors in licensed spectrum to maintain seamless and reliable connectivity.

However, the practical applicability of unlicensed spectrum is not limited to the capacity enhancement of traditional mobile operator networks. Technical and regulatory initiatives such as MulteFire, CBRS (Citizens Broadband Radio Service) and sXGP (Shared Extended Global Platform) make it possible for enterprises, vertical industries, third-party neutral hosts and other new entrants to build and operate their own independent cellular networks solely in unlicensed spectrum without requiring an anchor carrier in licensed spectrum. Furthermore, in conjunction with the availability of new license-exempt frequencies such as the recently opened 6 GHz band from 5925 MHz to 7125 MHz, the introduction of 5G NR-U in 3GPP's Release 16 specifications paves the way for 5G NR deployments in unlicensed spectrum for both licensed assisted and standalone modes of operation. Given 5G's inherent support for reliability and time-sensitive networking, NR-U is particularly well suited to meet industrial IoT requirements for the automation and digitization of environments such as factories, warehouses, ports and mining sites.