Private LTE/5G infrastructure is any 3GPP-based LTE and/or 5G network deployed for a specific enterprise/industrial customer that provides dedicated access. It includes networks that may utilize dedicated (licensed, unlicensed, or shared) spectrum, dedicated infrastructure, and private devices embedded with unique SIM identifiers. The market opportunity can be categorized in three segments: Mission-critical, industrial and traditional enterprise organizations. The barrier to consumption has remained high, limiting adoption to organizations possessing in-house competency and access to dedicated spectrum.
Source: https://www.helpnetsecurity.com/2021/01/21/private-lte-5g-infrastructure-market/