3 thoughts on “KDDI is planning Ultra 3G”

  1. Note that they hope to have the standard worked out by 2007, not the technology. HSDPA as a standard goes back to at least 2002, but you won’t see it deployed before 2006 . . . Achieving very high throughputs requires more spectrum than one can generally license. Getting an efficiency of 1 bit/Hz is considered quite excellent. At that efficiency you would need 100 MHz of spectrum to offer 100 Mbps service. I can’t think of an US carrier that has 100 MHz of spectrum in a given market even if you count 2.5 and 2.3 GHz licenses.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.