Is AI the Missing Fourth Dimension for 5G? Exploring the AI+ Revolution

Recently I discarded two weight scales – one old non‑connected model and another early‑generation connected one – and bought a new AI‑enabled scale that uses sensor data and a trained algorithm to estimate body fat.

These three scales symbolize three eras: traditional, Internet+, and AI+.

During a May business trip to Beijing I visited innovation labs, attended the GMIC 2017 AI panel with speakers like Hawking and Kai‑Fu Lee, and later joined the Wireless Big Data Conference, the Shanghai Mobile 3C forum, and the SSIST 2017 panel with experts from Toutiao, SenseTime, 360, and others discussing the AI boom and its potential winter.

From these intensive “coffee‑talks” I concluded that a massive AI+ revolution, built on big data and AI atop the Internet+, is reshaping every industry far beyond expectations.

Hardware is evolving with more sensors, turning ordinary devices into smart hardware. Open‑source tools such as TensorFlow have lowered the barrier for machine‑learning, shifting competition from algorithms to data acquisition.

In the 5G era, the focus is industry digital‑transformation markets. Investment in traditional telecom equipment is declining, while 5G is positioned to open new vertical markets and the Internet of Everything.

We must ask whether 5G needs an additional dimension – the fourth dimension – and I argue it is AI+.

At the Shanghai Mobile 3C forum and other academic discussions, experts highlighted AI and big data as the fourth dimension of 5G, proposing that AI‑driven digitalization should be integral to the network.

Wireless communication has approached the Shannon limit at the physical layer; further gains require data‑driven ML models and reinforcement learning to adapt to complex, time‑varying environments.

5G networks provide two layers of digitalization:

1. Intelligent assistance. AI/Big Data techniques improve network performance (RRM/RTT), enhance user experience, and drastically reduce OPEX.

2. Enable data commerce and services. Collect anonymized network, user, and application data, deploy pervasive sensing across millions of base stations, and build a global digital network.

AI/ML is no longer confined to the application layer; research now spans L1‑L7, with many traditional communication theorists adopting data‑centric approaches.

Adding this AI+ dimension transforms 5G from a flat plane into a three‑dimensional ecosystem, potentially triggering chemical‑like reactions rather than merely physical ones.

Ultimately, the race is for digital dominance; 5G must evolve beyond a passive conduit to capture a substantial share of the emerging digital market.