1.1 Coexistence among 802.20
systems - This would be inevitable. Specifically, with 802.20 having both TDD
and FDD variants that could be deployed in the same band, Coexistence TG has no
choice but to analyze the coexistence of 802.20 TDD and 802.20 FDD systems in
both geographically and spectrally adjacent cases.
1.2 and 1.2.1 Coexistence
among 802.20 and non-802.20 systems - Analyzing coexistence of 802.20 and
non-802.20 would depend on identification of target bands for 802.20 deployment.
Although theoretically possible to deploy 802.20 in any mobile band below 3.5
GHz, it is impractical to analyze all the bands. My recommendation would be
to recommend to the Coexistence
TG to pick a few "target bands",
given the regulatory and business factors, and then analyze the coexistence of
802.20 with the systems that are already deployed in those specific bands. These
"target bands" could be the ones that are more likely to see 802.20 deployment
in the near future. For instance, 2.5-2.69 GHz, in my opinion, would qualify for
a target band in the US and probably elsewhere.
1.2.2 Liaison - This should be definitely left to the Coexistence
TG to decide what other entities to have liaison with. The decision is going to
depend, partly, on the selection of "target bands". I think it would be
premature for the CG to make any recommendation on liaisons other than in the
general sense, e.g. liaison with regulatory authorities, ITU-R, CEPT, etc.,
which the TG will most probably have anyways.
Reza