One solution is frequency agility. Most modern transceivers can be
QSY'd by station automation software, which could monitor several
frequencies within a semi-automatic sub-band for inbound traffic. An
attended station wishing to engage an unattended station would send a
request on a locally-clear frequency; if no response were received, it
would assume this frequency to be busy at the unattended station's
QTH, and try an alternate frequency.
Coordination within the semi-automatic sub-bands would also help.
73,
Dave, AA6YQ
--- In digitalradio@yahoogroups.com, "RussellHltn" <[EMAIL PROTECTED]>
wrote:
> >>> I, actually, do not agree that there is a need for more new
> restrictions... nor do we need to further restrict the automatic and
> semiautomatic modes...
>
> ...it is now possible to write software to detect channel busy
> situations...<<<
>
> That's fine for protecting attended modes from fully-automatic
unattended
> modes, but what about those who are setting up NTS-like systems?
Shouldn't
> something be set up for them?
>
> Innovation is not limited to just attended modes. I don't see a
software
> solution to helping out the fully-automatic if they have to wait for
> everyone else to clear out of the frequency to operate. At least a
> gentleman's agreement to avoid a sub-band would help and some kind of
> coordination so that different systems can be coordinated in that
sub-band.
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