## 6 Future Trends of Smart City
As the development of smart cities continues, 5G networks are expected to be increasingly used due to their ability to provide enhanced security features, such as secure boot, network slicing, and secure element, which can help prevent cyber-attacks and data breaches, ensuring the security of IoT devices and the massive data they generate (as depicted in Figure 8). The impact of 5G on connecting billions of devices in a single communication technology is significant, especially in creating a massive IoT-enabled smart city. To achieve this, smart devices must be able to interact with each other and share data without the need for human intervention [220]. It is also vital for these smart devices to support real-time, demand-based events that can be coordinated between end-to-end devices. Additionally, they should be equipped with automatic and intelligent algorithms that can operate seamlessly during each phase of the smart city development, from planning to deployment and maintenance. This is going to ensure that the smart city infrastructure is efficient, scalable, and can adapt to the changing needs and demands of the citizens [221]. IoT-enabled 5G architectures are designed to provide a common platform that can fulfil the following requirements:  
* 5G networks should be adaptable and independent based on the specific needs of the applications. * Cloud-based Radio Access Network (CloudRAN) should be used to support massive connections of devices for various applications (as shown in Figure 6). * The core network architecture should be easy to implement and provide on-demand functions for network configurations. In the future, smart cities are going to rely heavily on 5G communications and advanced IoT technologies, which involve storing and uploading massive amounts of data to an IoT cloud server to extract useful information using data analysis methods. These smart cities are going to incorporate various aspects such as smart traffic, smart homes, smart agriculture, smart grids, and smart management. 5G-enabled IoT networks are going to provide multiple features, including direct device-to-device communication, typical architecture, advanced spectrum sharing, and interference management, which are going to be vital in building a complete smart city. Integrating AI with 5G networks is going to be integral to the future smart city. AI is going to handle massive amounts of data from IoT-based applications, such as public transportation, traffic lights, and citizens' daily activities, for more accurate and precise decision-making. This is going to enable finding insights into data patterns that can be used to boost the efficiency and productivity of municipal government operations while reducing related expenses. Additionally, AI is going to help reduce human errors, make automated data-driven decisions, implement efficient urban management, and explore new commercial possibilities. The role of AI in a smart city is to manage and analyze the vast amounts of data generated by IoT devices with accuracy and precision to aid decision-making. For example, public transportation, traffic lights, and citizens' daily activities generate enormous amounts of data, and AI can identify insights that can increase the efficiency and productivity of municipal government operations while reducing costs. Furthermore, AI can minimize human errors, make automated data-driven decisions, implement efficient urban management, and explore new commercial possibilities. Using AI and 5G technology, energy providers can optimize renewable energy sources such as solar and wind power. AI can predict when the sun is going to shine or the wind is going to blow, and 5G can instantly communicate this information to energy providers, allowing them to adjust their energy supply accordingly. AI and 5G can also help reduce traffic congestion and emissions in the transportation sector by optimizing traffic flow and identifying the most efficient vehicle routes. This can decrease time spent on the road, which in turn can reduce emissions and save energy.