The tradeoff, between access to scarce spectrum and delivery of commercial PSB, could not be sustained under conditions of spectrum plenty.
"If the BBC no longer requires the scarce spectrum it was granted … it should be obliged to give this valuable public resource up for alternative, public value use".
Cognitive radio ad hoc networks (CRAHNs) which are independent with infrastructure and fixed spectrum allocation policy, have been developed rapidly in the environment of scarce spectrum resources.
Cognitive radio represents a promising design paradigm for the next-generation of wireless networks that can enhance utilization of the scarce spectrum available.
In pre-digital times, the three main commercial networks ITV1, Channel 4 and Five were obliged, in return for a chunk of scarce spectrum, to provide such worthy stuff as news and educational programmes along with their soaps and reality shows.
With the proliferation of cell phones, pagers, satellite services and other wireless devices, the communications agency's top officials have warned that demand is so outstripping supply that it may lead to what they call a spectrum drought, making the scarce spectrum even more valuable to haves and have-nots alike.
Cognitive radio ad hoc networks are commonly perceived as ideal ad hoc environments where cognitive radio technology enables secondary users (SUs) to utilize scarce spectrum resources in a dynamic manner.
Although most of the research on Cognitive Radio is focused on communication bands above the HF upper limit (30 MHz), Cognitive Radio principles can also be applied to HF communications to make use of the extremely scarce spectrum more efficiently.
"Despite N.F.L.'s best efforts to manage its wireless microphones on its increasingly scarce spectrum," the football league wrote in a letter to the F.C.C., "N.F.L. has received numerous recent reports of wireless microphone interference during games, rendering coaches unable to communicate plays to their quarterbacks and referees unable to consult one another on calls".
This idea of further compressing bands will efficiently solve the problem of scarce spectrum resource in future.
