6GHz spectrum: Shared resource or telco expansion tool?

The story emerging from the Department of Telecommunications over high-power 6 GHz Wi-Fi is being framed as a stand-off between the space agency and the telecom industry. That framing overlooks a more interesting question underneath it: what happens when a band of spectrum set aside as a public commons for everyone becomes attractive enough that large commercial players want a bigger share of it.

It seems a debate on who gets to use the free spectrum.

Unlicensed spectrum has always operated on a simple bargain. Anyone can use it, a router in a living room, a wireless mouse, a baby monitor, a smart speaker, provided the power is kept low enough that thousands of devices can share the same frequencies without stepping on each other or on licensed services nearby. Nobody pays for it, nobody owns a slice of it, and nobody gets priority. That bargain is precisely why Wi-Fi became cheap and ubiquitous in the first place.

What Reliance Jio and Bharti Airtel are asking for changes that bargain in a subtle way. They do not want to buy spectrum through an auction, which is the normal route for a company that wants guaranteed, high-power, wide-area access to airwaves. They want to use the free, delicensed 6 GHz band, but at power levels closer to what a licensed mobile network would use, so it can punch through walls and travel across neighbourhoods to deliver fixed wireless broadband to homes that fibre cannot economically reach. That is a legitimate business problem, laying fibre to every last home in India is expensive and slow, but the proposed solution effectively asks the regulator to let commercial carriers operate telecom-grade networks on a band that was opened up on the premise that it would stay low-power and shared.

ISRO’s objection, that stronger outdoor signals in this band risk bleeding into satellite uplink frequencies, is the immediate technical trigger for DoT’s caution. But even if that specific interference risk is resolved through engineering fixes, the underlying policy tension does not go away: once a telecom operator with millions of subscribers starts running standard-power access points across a city, ordinary Wi-Fi users, smart-home devices and enterprises sharing that same unlicensed band suddenly have far less clean spectrum to work with. A band designed for uncoordinated, small-scale, everybody-shares use starts to behave like a semi-licensed network shaped mainly by whoever deploys the most infrastructure first.

There is also a global precedent India seems to be sidestepping rather than adopting outright. Regulators in the United States and several other markets ran into exactly this problem, how to allow high-power, standard-power 6 GHz devices outdoors without harming incumbent licensed users, and settled on automated frequency coordination as the answer. Instead of a blanket yes-or-no on high power, an AFC system checks, in real time, which frequencies and power levels are safe to use in a given location based on the presence of nearby licensed operations, and only clears devices that will not cause interference. It is a technical arbitration layer rather than a policy compromise, and it has let several countries greenlight standard-power outdoor Wi-Fi without reopening the entire licensing debate. India’s IIT Madras-led committee has reportedly found enough of an interference margin to work with, and industry is separately proposing a device-registration portal as a lighter-weight monitoring alternative. Both ideas point toward the same conclusion: this is solvable as an engineering and monitoring problem rather than a binary choice between satellites and broadband.

Framed that way, the more consequential decision DoT is actually making is not whether ISRO’s satellites are safe, that looks achievable with the right coordination architecture, but whether India is comfortable letting telecom operators fold unlicensed spectrum into their commercial broadband strategy at all. Router makers and consumer-tech companies have their own stake in this, since the same band underpins next-generation Wi-Fi 6E and 7 gadgets, from gaming consoles to mixed-reality headsets, that global manufacturers have held back from the Indian market until the spectrum was available. Their interest lies in keeping the band genuinely shared and low-friction for ordinary devices, rather than seeing large portions of it taken up by a handful of national carriers.

The path DoT chooses among these options, granting full high-power access, adopting a coordination-based middle ground such as AFC, or maintaining the current limits on indoor and very-low-power outdoor use, will largely determine whether 6 GHz in India remains a shared resource for everyday devices or tilts toward serving the network expansion needs of large telecom players.

CT Bureau