6G Networks: The Technology of the Future

The Evolution of Wireless Networks

In an era where communication networks play a vital role in driving industries and improving people’s way of life, the evolution of each generation of networks, or “Generation (G),” is not merely a technological “upgrade.” It has also transformed the way humans communicate.

Beginning with the 1G (First Generation) era, which started in Thailand around 1986, mobile phones were introduced primarily for voice communication, allowing only calls to be made and received. This was followed by the 2G (Second Generation) era in 1990, when digital technology enabled users to send short text messages. Next came the 3G (Third Generation) era in 2012, marking the beginning of the smartphone age. Then, in 2016, the 4G (Fourth Generation) era emerged, bringing a wide range of smartphone applications and enabling multimedia data to be transmitted over mobile networks. By 2021, the 5G (Fifth Generation) era had arrived, fully supporting the Internet of Things (IoT). As a result, technologies such as smart cities and autonomous vehicles were no longer merely imaginary concepts.

The next stage in the development of mobile networks is the 6G era. With 6G, we will see a new form of wireless communication that offers data transmission rates up to 50 times higher and speeds up to 100 times faster than 5G. At present, 6G is still in the research and development stage, and it is expected to be commercially available as early as 2028.¹ In addition, Precedence Research forecasts that the 6G market will grow from USD 8.3 billion in 2025 to USD 57.6 billion in 2034, representing a compound annual growth rate (CAGR) of 24%.²

Key Characteristics of 6G

6G technology is expected to be faster, more stable, and more secure than 5G. Its key characteristics can be summarized as follows:

Terahertz Frequency Band

The terahertz (THz) frequency band remains underutilized for 6G applications. This is because the band operates above 100 GHz, which does not overlap with the current 5G frequency range of 24–100 GHz.³ As a result, it can be used to transmit data at extremely high speeds of up to 1 terabit per second (Tbps). This capability will serve as an important foundation for the development of future communication technologies, such as real-time hologram transmission.⁴ For example, it could enable highly realistic three-dimensional remote meetings, even when participants are located far apart. It could also enhance online gaming by delivering more realistic visuals and faster responses, allowing users to experience almost no delay or interruption during gameplay.

Ultra-Low Latency

6G is expected to have a latency of only 0.1 milliseconds, which is 10 times lower than 5G’s latency of around 1 millisecond. This allows data to be transmitted almost instantly between the source and the destination, making real-time operations more efficient. Therefore, 6G is highly suitable for applications that require high precision, such as autonomous machinery in manufacturing processes, self-driving vehicle control, and remote robotic surgery, where doctors operate surgical robots from a distance.⁶

Enhanced Cybersecurity

6G can integrate artificial intelligence (AI) with quantum encryption to protect against cyber threats in real time. AI can help detect threats and prevent unauthorized access to data, while quantum encryption can enhance the security of data transmission by making it more difficult for information to be intercepted or stolen. The combination of these two technologies gives 6G networks a strong advantage in protecting sensitive data and creating highly secure communication channels.⁷

Energy Efficiency and Sustainability

6G networks can also support sustainability goals by emphasizing energy efficiency at every level, from base stations to end-user devices. This means that 6G can support high-speed connectivity without necessarily increasing overall energy consumption. In the long term, this could directly contribute to reducing carbon emissions.⁸

However, the development and deployment of 6G technology still face several challenges.⁹ These include the need to develop hardware capable of supporting terahertz frequency bands, the high investment required to install base stations and connect them with existing networks, investment in cloud technologies to support increasing data volumes, and the design of appropriate regulatory frameworks for emerging technologies.