SpectrumTalk

The independent blog on spectrum policy issues
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Our focus is the relationship between spectrum policy
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When they deserve it, we don't hesitate to criticize either NAB, CTIA or FCC.


Field of Dreams & Spectrum Policy



This week, the 80th anniversary of the Communications Act of 1934, is also the 25th anniversary of “Field of Dreams”, the movie most remembered for the line “If you build it … they will come”. While I recall that President Bush (41) publicly said he was confused about the movie, President Bush (43) actually was a great fan.

The connection to spectrum policy? Classic FCC spectrum policy (along with spectrum policy in other places) was prescriptive - that is users could do A and B, but not C if C was not explicitly allowed. Thus when I joined FCC in 1979, land mobile (Part 90) users were allowed AM and FM modulation and it took a long series of rule makings, some of which inconsistent in their final technical details details, to allow digital modulation for all users. By contrast, today’s rules are generally (broadcasting and public safety being major exceptions) proscriptive in that they tell you what you may not do - generally things that would result in interference to other users.

Hayes book cover
The reason why the 1981-85 rulemaking that brought forth Wi-Fi, Bluetooth, ZigBee and many other less known products was so controversial that it resulted in an attempt to fire your blogger after the rules were adopted was that it was an earlier action to move away from this prescriptive model. The rules adopted in Docket 81-413, now updated and codified as 15.247, did not say “let there be Wi-Fi”, they said “here is this spectrum, here are rules that prevent harm to anyone else, feel free to innovate and offer new products to the public and let’s see where this goes! “ (In truth, in 1985 wired/Ethernet LANs were nonexistent in offices and homes and there are no interest in any type of wireless LAN as a product for serial production. But the flexibility grand in the Docket 81-413 R&O meant that when interest developed for RLANs within a few years those interested did not have to come to FCC and grovel for permission for years. Thus they had timely market access and history was made!)

So as we near the 1 year anniversary of the IEEE-USA petition for FCC on the spectrum above 95 GHz that now lacks any rules (and is hence implicitly forbidden for normal licensed or unlicensed use) today let us ponder what we gain by having no such rules or even a defined path to such rules. In the Docket 81-413 rulemaking most commenters were opposed saying the technology under discussion was “blue sky” and had no demand. Yet within 2 years commercial products were available. A few years later came Wi-Fi and Bluetooth -- now “applications that have changed our world”.

Let us ponder of the lessons of “If you build it … they will come” and also the spectrum policy variant: “If you allow it .. they may well build it”. Let’s see if we can convert most FCC spectrum rules from prescriptive to proscriptive structure. (The cellular rules generally have this approach already.)


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