The battle for the 6GHz spectrum band is hotting up in South Africa, mirroring global debates on the allocation of spectrum between Wi-Fi and IMT (cellular) operators. The core of this conflict is the need for additional bandwidth to meet the exploding demand for internet connectivity.
On one side, cellular operators argue for more spectrum to expand their network capacities; on the other, the Wi-Fi industry advocates for full access to the 6GHz band, claiming it will deliver greater value, faster internet and seamless connectivity.
This “spectrum dilemma” was one of the key topics of discussion at the Wi-Fi Now World Congress and the Dynamic Spectrum Alliance Global Summit in Geneva, which I recently attended. The message was clear: the future of connectivity depends on how efficiently we allocate spectrum – and Passpoint and Open Roaming technologies may offer a viable solution to balance the needs of both cellular and Wi-Fi operators.
Spectrum is the foundation of modern communication, and its scarcity is one of the biggest challenges we face today. The 6GHz band is considered prime real estate for expanding high-speed internet access, whether through Wi-Fi or cellular networks.
To understand the stakes, let’s consider an example from a few years ago: when Rain became the first South African operator to offer truly uncapped wireless services, it sparked a debate. The CEO of Vodacom Group, Shameel Joosub, expressed concern at the time, stating that this model would stretch network capacity to breaking point. This exemplifies the ongoing tension between bandwidth supply and demand, and his predictions were later proven to be correct.
Fast-forward to today, and the battle is evident globally. For instance, in Zimbabwe there have been complaints about Starlink’s limited capacity in high-density areas like Harare, where speeds sometimes fall below 1Mbit/s. Starlink, designed for rural, low-population areas, struggles to meet demand in cities. This highlights a larger point: no matter the technology, capacity limitations remain a concern.
The fight over 6GHz
Globally, the debate over the 6GHz spectrum is already in full swing. In Africa, Morocco was one of the first countries to open the lower 6GHz band for Wi-Fi, followed by South Africa, with Nigeria opening the entire band.
In contrast, countries like the US (and most of the Americas) have fully embraced Wi-Fi access across the entire 6GHz band. Brazil is another significant player, where the consensus leans heavily towards opening the full band for Wi-Fi. The chairman of the Brazilian equivalent of South Africa’s communications regulator, Icasa, has already confirmed this direction.
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The financial benefits of allocating the 6GHz spectrum to Wi-Fi are hard to ignore. Raul Katz, president of Telecom Advisory Services and a global expert on the economic impacts of ICT, presented research at both the Geneva congress and earlier in Brazil, showing that full Wi-Fi utilisation across the band would generate the most revenue over a 10-year period. The numbers speak for themselves, yet the debate continues, as both IMT and Wi-Fi operators stake their claim.
If you compare GDP impact, product surplus and consumer surplus, allocating the entire band to Wi-Fi over a 10-year period would generate US$698-billion, much more than if a big chunk was reserved for IMT.
Enter Passpoint and Open Roaming
So, how do we resolve this impasse? Technologies such as Passpoint and Open Roaming offer an elegant solution that benefits both Wi-Fi and cellular operators.
Passpoint, which is already widely used in the UK and India, allows for seamless, automatic switching between cellular to Wi-Fi networks without the need for users to manually log in each time they enter a new Wi-Fi zone. The magic of Passpoint lies in its authentication process, which leverages Sim cards on phones to authenticate users automatically to Wi-Fi networks.
Open Roaming takes this concept further by enabling users to authenticate using a variety of accounts – whether Google or even Facebook – across any Wi-Fi hotspot or cellular network. This creates a seamless experience, known as Wi-Fi offloading, where cellular networks offload traffic to Wi-Fi networks when possible, freeing up valuable spectrum for IMT operators while providing users with uninterrupted internet access.
This seamless connectivity model was particularly striking to me during my trip to Geneva. At the airport, it took me 20 minutes to connect, with a complicated and demanding portal to the Wi-Fi network, time that could have been saved if Passpoint or Open Roaming had been in place. The experience drove home the point that these technologies are not just theoretical solutions but real-world tools that can drastically improve user experiences while optimising network performance.
Why South Africa should embrace Wi-Fi offloading
The implementation of Passpoint and Open Roaming in South Africa could revolutionise the way we think about spectrum allocation. By encouraging Wi-Fi offloading, cellular operators could significantly reduce congestion on their networks, allowing them to allocate their available spectrum more efficiently. Meanwhile, Wi-Fi operators gain access to the full 6GHz band, delivering faster, more reliable internet services.
In Brazil, where similar debates over spectrum have unfolded, the decision to allocate the 6GHz band to Wi-Fi has led to higher revenues and a more robust connectivity ecosystem. South Africa stands to benefit from following a similar path, especially as internet usage continues to climb exponentially.
Looking to the future
Another exciting development discussed at the Wi-Fi World Congress was the role of artificial intelligence – not the ChatGPT variety, but in network management. AI can be employed to analyse network behaviour, predict congestion points, and enhance handover between cellular and Wi-Fi networks.
By using AI to fine-tune these transitions, both IMT and Wi-Fi operators can ensure that users experience seamless, high-quality connectivity, even as they move between different network types.
South Africa’s connectivity future hinges on finding a balance in the 6GHz spectrum allocation. By embracing technologies like Passpoint, Open Roaming and AI-driven network optimisation, we can meet the demands of both cellular and Wi-Fi operators.
The benefits are clear: more efficient networks, enhanced user experiences and a futureproofed spectrum policy that supports the continued growth of the internet across the country.
- The author, Paul Colmer, is executive committee member of the Wireless Access Providers’ Association
- Read more articles by Paul Colmer on TechCentral
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