## 4 Review and Survey Articles
A comprehensive review of recent THz band antenna manufacturing and measurement work is provided. The design, construction, and measurement of THz band antennas are discussed. THz band antenna research directions for 6G technology are addressed, as well as THzband antenna design, fabrication, and testing. A description of future research prospects for the integration of blockchain and 6G technologies in UAV communications is offered in another work [47]. Then, show a case study of a blockchain-based UAV communication system that uses 6G networks to secure Industry 4.0 applications. Another study [48] discusses how integrating AI in URLLC improves multi-level architecture and provides a technique for constructing wireless networks. This is accomplished by using learning, prediction, and decision-making to manage the large number of people who have been trained by big data. The research paper's secondary goal is to improve a multi-level design. Two publications [49; 50] looked into the issues, requirements, and trends around 6G. Also, talk about how AI approaches can help with 6G. Identify some new exciting 6G services and use-cases based on the requirements and solutions that 5G cannot adequately serve. A study on the evolution of KPIs and technical trends toward 6G was published in one publication [51]. Short-term (2022'ish), medium-term (2025'ish), and long-term (2030'ish) timelines are all considered. Forecasts on developing use cases and their requirements, as well as assumptions on the pace of wireless technology improvements, are used to examine the evolution of these KPIs. The fourth group 5G, 6G-IoT Information of Things, is discussed as well as in regard to the idea of merging IoT, 5G, and 6G. Three papers [52; 53; 54] reported on the evolving automotive cyber security, which can use 5G to be faster and more efficient. Presented a peer-to-peer IoT infrastructure, built to OpenFog standards, which moves control out to \"things\" without involving devices or cloud computing. A new article [55] offered a 'Disruptive Networking' strategy, which enables many IoT nodes to take part in autonomous and cooperative decision-making. Other reports [56] explore methods of transitioning the healthcare and renewable energy industries from e-government to smart government. Three papers [57; 58; 59] examined IoT-based strategies for the 5G mobile communications transition. Complex IoT systems necessitate heterogeneous computing and high-speed communication networks like 5G. Several real-world IoT systems infrastructures utilising heterogeneous computing are also introduced. Classify and review different wireless IoT connectivity solutions, starting with the connectivity range. Four papers [60; 61; 62; 63] presented practical approaches for the smooth integration of smart city applications in 5G networks. In-depth use of ITSs, cyber-security, energy-efficient use of SGs, effective use of UAVs for the provision of the best 5G and B5G services, and a smart health care system in a smart city. Three [64; 65; 66] studies evaluated how 5G technology could help with the management of disasters. The way to managing government, corporate, and personal disaster responses is to use Big Data, IoT, social media, and cloud computing. Two different publications [67; 68] summarise the main enabling technologies as well as a whole slew of new developing uses of 5G-IoT, each tied to advancements in artificial intelligence, ML, and digital edge computing. This post outlined the essential enablers for mMTC in cellular networks. One article [69] article investigated different issues associated with fog computing in 6G-enabled large IoT. Categorize several energy-efficient fog computing options for IoT and summarise the current progress. Future projects and open potential to build energy-efficient fog computing solutions are discussed at last. One study [70] provides a full analysis of ML, QC, and QML, highlighting their possible benefits, challenges, and use cases for the B5G networks.