[pskmail] Handling of Mode switching using RSID in PSKmail
- From: "Rein Couperus" <rein@xxxxxxxxxxxx>
- To: pskmail@xxxxxxxxxxxxx
- Date: Sun, 11 Sep 2011 10:23:17 +0200 (CEST)
Handling of Mode switching using RSID in
PSKmail[https://www.facebook.com/groups/109994412353261/doc/264135596939141/]
The PSKmail server measures the quality of up- and downlinks separately, and
decides
which mode will be best for sending the next frame on server and client.
It uses RSID signalling to force the client into a new listening mode. As RSID
signalling
takes valuable time away from the link, it is only used when absolutely
necessary,
i.e. in those cases when the server changes its TX mode without explicitly
telling the client...
For the same reason, in case the link is unconnected (idle), RSID is used on
the client
only in case it wants to use a mode different from the default link mode.
The default mode in Europe is PSK500R, in USA it is PSK250.
This behaviour makes it necessary to not only control the modes but also the
status of RxID and TxID on both client and server.
In case the link is idle:
Default modes on client and server = PSK500R
client RxID=OFF, server RxID=ON, so client can connect in other mode
client TXID=OFF, server TxID=ON
During a connected session:
Modes are set by the server
client RxID=ON, server RxID=OFF, so incoming TxID's from qrm are dead
client TXID=OFF, server TXID=OFF, and ON when mode switching.
This way we gain 1 second of link time per frame...
Rein PA0R
--
http://pa0r.blogspirit.com
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- » [pskmail] Handling of Mode switching using RSID in PSKmail - Rein Couperus
