Nico,
It sounds Igor’s proposal as futuristic but the callsign abbreviation and
subscriber profile exchange practice via control signal plane can be seen
anywhere in network protocols. Internet example is DHCP protocol, which makes
the connection possible more than 4,294,967,296 devices with IPv4 32-bit
address limitation. If you remember old telephone system, you do not need to
dial full 15 digit telephone numbers which ITU defines if you want to connect
to other party within area code or city code. If you demand subscribers to
dial 15 digits with rotary dial telephone at call setup, how long do they
spend? I am sure it will be longer than one FT8 sequence. Subscriber profile
exchange on control signal plane is similar if you look into HLR/VLR
specification of cellular networks.
Does FT8 live in Titanic age or after telephone and Internet age?
Regards,
take
de JA5AEA
Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10
________________________________
From: Nico Palermo <[email protected]>
Sent: Saturday, September 1, 2018 9:00:12 AM
To: Игорь Ч; WSJT software development
Subject: Re: [wsjt-devel] WSJT-X 2.0 possible new mode/protocol
Probably we can add more flexibility if some information will be passed over
Internet, for instance free text messages and GRID, it will spare more bits
toward sensitivity on the radio interface.
Ok, Igor, but then I would prefer to call the new modes "Weak Internet
Communications".
73
Nico / IV3NWV
2018-09-01 0:33 GMT+02:00 Игорь Ч via wsjt-devel
<[email protected]<mailto:[email protected]>>:
Hello Joe,
.
It was excellent example with the WSPR QSO, just thought we can get additional
FT8 gain if some messages at QSO will be transmitted as 'hash hash' / 'call
hash' / 'hash call' instead of callsigns.
.
Yes, there is a trade off between the sensitivity and protocol flexibility.
Probably we can add more flexibility if some information will be passed over
Internet, for instance free text messages and GRID, it will spare more bits
toward sensitivity on the radio interface.
.
Other option is to pass some message's hash over Internet while transmitting
this message via radio interface, it will also spare some bits toward
sensitivity.
.
Proposed by Take JA5AEA variable code rate: we can pass information on the code
rate over Internet at the QSO, hence appropriate decoder can be used per each
message. The same approach can be implemented with the variable protocol where
protocol details, for instance i3bit, can be broadcasted over Internet.
.
Leaving callsigns(hash) and report to the radio interface and combining radio
interface messages and traffic over Internet in the FT8+ protocol we can marry
JT65/JT9 sensitivity and FT8 rate of QSO.
.
I do not believe any new mode outside WSJT-X is a good idea, it would be more
efficient to keep going in the common direction.
.
73 Igor UA3DJY
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