Big data and IoT revolutionize cities, paving the way for smart environments.
Big data and Internet of Things technologies are important for smart cities. Big data helps cities learn from lots of data, while IoT connects sensors and devices in the real world. Combining these technologies brings new challenges for smart cities. This paper talks about how communication technologies and smart applications are used in smart cities. It also discusses how big data can change cities and proposes a business model for using big data in smart cities. The study can help researchers and industries develop smart cities using big data.