copyright,1996169dalecarnegieassociates,inc

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orming to recognised standards, with a clear scope of high data rates such as HIPERLAN/2, , and so on doc.: IEEE Submission May 2020 Vic Hayes, Lucent Technologies Slide 9 Remendation 2 • Add ”HIPERLAN/2 and IEEE ” devices to the allocation of the 51505250 MHz • Do a regular review if more standards have met certain requirements doc.: IEEE Submission May 2020 Vic Hayes, Lucent Technologies Slide 10 Licensed Spectrum? • Agree with the considerata • Agree with the need for licensed spectrum • But not in the 455 MHz allocated to HIPERLAN/2 and – removal of the spectrum from the license exempt use will result in unacceptable performance and thus capacity degrades – Note that the 455 MHz does include spectrum used by radars. • A typical wideband radar used more than 100 MHz – HIPERACCESS is a typical licensed band application – has been moved outside the 5 GHz range doc.: IEEE Submission May 2020 Vic Hayes, Lucent Technologies Slide 11 Conserve spectrum for license exempt – High data rates require a large signal margin and this in turn limits the tolerance for interference – including interference from the same system. – For example, the reuse factor for the 54 Mb/s mode range is 67 – which means that 67 channels are needed to achieve the full 54 Mb/s on each channel in an arbitrarily large system – If there are fewer channels the interference among channe。