Page 260 - GuideFWA

generated traffic is almost equal (probably higher due to WRS management traffic, but never
the double)
The above list of errors are enough to invalidate any conclusion as the reported ones in [20]
(obviously, calculations in [20] are clearly tendentious), but, essentially, they demonstrates that
analysis performed in [1] is more accurate that the proposed by this document.
As already mentioned above, in our opinion, the “worst case analysis” which is included in report
[1] is more accurate than the proposed one in [20], specially if taken into account the
considerably number of errors contained in [20].
The accuracy of [1] is much higher because it allows a coherent comparative analysis,
independent of the absolute values which could be calculated by any methodology. The main
condition for any methodology is to be coherent and to use a homogeneous set of parameters for
all the scenarios.
FROM THIS POINT OF VIEW, IT IS NOT NECESSARY TO IMPLEMENT A NEW
METHODOLOGY AS PROPOSED IN [20], AND NO FURTHER WORK BY THE EXPERTS
GROUP IS NEEDED.
However, and trying to provide the maximum information as possible, an alternative viewpoint
about the interference from DECT systems to IS-95 and IS-136 systems is also provided in
document PCC.III/998/98 [21], which presents, as additional information to report [1], a more
detailed study regarding this matter. It analyses in absolute terms a real scenario where the effect
of the activity factor of the DECT interferer and up-link power control of the PCS system is
included. In this scenario [21], as low as 100m separation between FWA base and PCS base have
almost no influence on the PCS system traffic.

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