The 6GHz Spectrum Debate: Why You Can't Just Look at Next Year's Router Benchmarks

Discussions about the 6GHz spectrum have heated up again recently. Some argue that since the n79 band didn't achieve widespread adoption, the upper 6GHz band shouldn't be reserved for 6G—it should go straight to Wi-Fi so home routers can get faster first. This argument sounds pragmatic, but it conflates several issues of a completely different nature.

Spectrum planning must consider industrial initiative ten years from now, not just next year's router benchmarks.

01 First, Clearing Up a Misconception: n79's "Low Coverage Ratio" Doesn't Mean Failure

The n79 band (4800–4960MHz) is held by China Mobile and China Broadnet. As of the end of 2025, n79's effective signal coverage area is less than 0.3% of the country's urban built-up areas. On the surface, this figure seems sufficient to conclude "promotion failure."

But this misunderstands the band's positioning. The n79 band was never designed for wide-area coverage from the start—its core role is hotspot capacity supplementation. China's 5G primary coverage division of labor is clear: n28 handles wide coverage, n41 is China Mobile's primary mid-band, and n78 carries the mainstream business of China Telecom and China Unicom. n79 is more like the network's "traffic spillway," specifically deployed in concert venues, subways, high-speed rail stations, and other high-density areas, starting to offload traffic once existing base station capacity is saturated.

Using a 0.3% coverage ratio to dismiss n79 is like using "highways account for an extremely low proportion of total national road mileage" to dismiss highways—the evaluation standard itself is flawed.

02 6GHz and n79 Are Not the Same Type of Spectrum at All

Many discussions make a key logical error: directly using n79's deployment difficulties to predict 6GHz's prospects. But the two are completely incomparable in bandwidth scale, strategic positioning, and global industrial consensus.

The upper 6GHz band (6425–7125MHz) has a full 700MHz of continuous spectrum resources. Compare it directly with existing 5G mid-bands: the primary band n41 has 100MHz of available bandwidth, n78 has 100–200MHz, while 6GHz delivers 700MHz of continuous bandwidth in one step—several times the scale of existing 5G mid-bands. 3GPP has already defined 6425–7125MHz as the n104 band, and standardization of core RF specifications has been completed.

6G's technical vision includes Tbps-level peak rates, microsecond-level air interface latency, and centimeter-level high-precision positioning. These hard targets cannot be achieved by optimizing 5G systems—they fundamentally require ultra-large bandwidth physical spectrum. Without this 700MHz of continuous spectrum, many of 6G's core technical indicators become castles in the air.

03 Global Route Divergence: Why the US/South Korea and China/Europe Choose Differently

There are two major technical routes globally for how to allocate 6GHz.

US/South Korea route: Open the entire 6GHz band as unlicensed spectrum for Wi-Fi 6E/7. Short-term gains are intuitive—Wi-Fi routers directly gain huge bandwidth, and home network speeds improve significantly. The cost is that the mobile communication industry loses crucial mid-band reserves.

China/Europe route: Allocate the upper 6GHz band's 700MHz to licensed mobile communications (IMT), while temporarily reserving the lower band 5925–6425MHz for later planning. At the WRC-23 World Radiocommunication Conference, Europe explicitly supported this approach, and China aligned with Europe.

The root of the divergence lies in industrial foundations. US domestic carriers have relatively weak network coverage capabilities, so the FCC prefers to rely on unlicensed Wi-Fi to let user-side devices fill in coverage themselves. In contrast, China and Europe have both mature carrier systems and leading equipment manufacturers like Huawei, ZTE, Ericsson, and Nokia—licensing IMT spectrum can drive a trillion-scale industrial chain spanning base stations, chips, terminals, and RF components.

04 What's the Cost of Giving It All to Wi-Fi?

If the entire 6GHz band were handed over to Wi-Fi, there would be three costs to pay.

First, 6G loses its most core spectrum foundation. The industry expects the 6G commercial window to fall in 2029–2030, and spectrum planning needs to be laid out nearly a decade in advance. Once 6GHz is ceded, 6G can only turn to bands above 7GHz or terahertz frequencies, but higher frequencies have greater propagation loss and lower industrial maturity—coverage capabilities far inferior to the golden 6GHz band.

Second, it interrupts the smooth evolution from 5G to 6G. 6GHz is called "golden spectrum" largely because its RF hardware can be compatible with existing 5G ecosystems at 2.6GHz and 3.5GHz, allowing base stations and terminal chips to iterate smoothly. Once 6GHz goes to Wi-Fi, the 5G-to-6G upgrade would have to jump to a completely different band, multiplying R&D and retrofit costs across the industry.

Third, it would deal a heavy blow to China's trillion-scale mobile communication industrial chain. Licensed mobile spectrum leverages trillion-level industries including base station construction, carrier networks, communication chips, and RF components. The Wi-Fi consumer electronics industry is also substantial, but the two are not on the same level of national strategic weight.

05 Wi-Fi 7's "Crippled" Performance Isn't 6G's Fault

Many argue that China's Wi-Fi 7 experience is incomplete because 6G took away the 6GHz band. But examining the spectrum status quo reveals this attribution doesn't hold.

China's legally available 5GHz Wi-Fi spectrum: UNII-1 (5150–5350MHz) 200MHz, indoor low-power only; UNII-3 (5725–5850MHz) 125MHz. The middle 5350–5725MHz is a radar protection band, requiring DFS dynamic frequency avoidance, which cannot be used stably.

In other words, the maximum continuous bandwidth China's Wi-Fi can stably use is only 160MHz, while Wi-Fi 7 needs 320MHz continuous channels to reach full performance. Even if the lower 6GHz band were opened to Wi-Fi, the frequency gap between it and the upper end of 5GHz makes it difficult to assemble a complete 320MHz continuous channel.

The crux of Wi-Fi 7's discounted experience lies in radar protection bands fragmenting the 5GHz spectrum. This is a legacy issue from earlier spectrum allocation and has no causal relationship with planning 6GHz for 6G.

06 What It Means for the Device Side

The direction of spectrum policy will ultimately feed through to device selection.

Before the 6GHz allocation is finalized, the device side of industrial wireless projects still primarily relies on existing mature bands. MovingComm's product line in the industrial wireless field covers 4G/5G industrial routers, wireless bridges, industrial gateways, and more. Taking the ComIn I2350 5G industrial router as an example, the device supports 2.4GHz and 5.8GHz dual-band Wi-Fi concurrency with a total bandwidth of up to 1200Mbps, suitable for wireless coverage in factory workshops, warehouse logistics, and other scenarios. For scenarios requiring higher bandwidth and lower latency, the ComIn I5200 supports 2T2R 802.11ax dual-band concurrency with a maximum wireless rate of 3000Mbps, supporting hundreds of wireless terminal connections.

These products operate in bands permitted under current policy and don't involve the 6GHz allocation controversy. For technical professionals advancing industrial wireless projects, understanding the direction of spectrum policy while grounding solution design in existing mature bands is the more prudent approach.

07 Final Thoughts

Spectrum allocation has never been a zero-sum game of "whoever benefits most gets it," but rather a trade-off between ordinary users' short-term experience and the nation's long-term communication industry development.

China's alignment with Europe in reserving the upper 6GHz band for mobile communications—the final effectiveness of this strategic choice will be tested by the maturation and deployment of the 6G industry in a few years. But from the perspective of the spectrum planning window, the current layout has not missed the timing.