The real question is "Is using different frequencies for forward and reverse path such a problem?" to which the answer is, "No. In many ways it is an advantage".
This may be a solution, but it is not clear there is actually a problem it solves.
Does this enable more total data to be transmitted where there are multiple users in a band? When they are using spread spectrum and reception conditions are poor, and one or both ends are moving through buildings or spaces occupied by reflective surfaces?
I am sure someone will buy the patent, but much less sure it will turn out to be value for money.