<div dir="ltr">Direwolf 1.5 has a duplex mode, so a test harness should be easier to build.</div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Mar 3, 2018 at 1:22 PM, Robert Bruninga <span dir="ltr"><<a href="mailto:bruninga@usna.edu" target="_blank">bruninga@usna.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div><div><div><div><div><div><div>Ancient Packet Question:<br><br>For a long string of NETROM nodes operating on alternating A/B BANDS (full duplex), would throughput be efficient or would ACKS from the next digi collide with incoming traffic from the previous one?<br><br></div>Consider a string of 9 nodes in a row:<br><br></div><div>--1-- --2-- --3-- --4-- --5-- --6-- --7-- --8-- --9--<br></div>TXA RXA TXA RXA TXA RXA TXA RXA TXA<br></div>RXB TXB RXB TXB RXB TXB RXB TXB RXB<br><br></div>If I remember conventional traffic, a sending station will send up to seven packets in a single transmission and, on a half duplex channel, the ACKing station will ack the last one he got correct.. But if it is a full duplex channel, would the single incoming transmission of 7 packets be generating a continuous stream of all seven acks since the receiving node does not have to wait for the channel to clear? What setting tells it to wait to see if there are more packets before originating a single ack?<br><br></div></div>It would seem that for only a few packets (all fitting in a single transmission) that the bulk of traffic might ripple quickly along the chain. But as soon as more traffic was pending at the source, or a continuous feed of traffic, that things would clog up quickly. Then this might be no better than all TX/RX on a single frequency half duplex anyway.<br><br>Or is max throughput only possible with every link having a clear frequency<br><br>---1--- ----2---- ----3---- ------4----- ----5---- -----6----- ----7-----<br></div>TXA RXA/RXB TXB RXB/RXC TXC RXC/RXA TXA<br></div> RXC TXC RXC/RXA TXA RXA/RXB TXB RXB/RXC<br><br></div>I guess I never ever operated conventional packet over full duplex links and so have no basis for thinking it through..<br><br></div>Bob, WB4aPR<br><br></div>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><br><hr><div style="float:left;padding-left:1em"><font><font><font color="#0000ff">John D. Hays</font><br><font color="#000000">Edmonds, WA</font></font></font></div><div style="float:left;padding-left:1em;color:blue"><font><span style="color:rgb(128,128,128)"><font>K7VE</font></span></font><br><span style="color:rgb(128,128,128)"><font></font></span></div><div style="float:left;padding-left:1em;color:blue"><span style="color:rgb(128,128,128)"><br></span></div><div style="float:right;text-align:right"><div style="padding-top:0.5em"><img src="http://k7ve.org/images/Facebook-26.png" style="font-size:12.8px"> <img src="https://docs.google.com/uc?export=download&id=0B16WvG35kZ7SUFYwZldBMmJXeWs&revid=0B16WvG35kZ7STXlkYm1oMkpHYzVxOUlxVEtXc1dqMXZhdjZFPQ" style="font-size:12.8px"> <a href="http://k7ve.org/blog" target="_blank"><img src="http://k7ve.org/images/blog-icon-box-red-26.png"></a> <a href="http://twitter.com/#!/john_hays" target="_blank"><img src="http://k7ve.org/images/Twitter-26.png"></a></div><div style="padding-top:0.5em"><br></div></div></div></div></div></div></div></div></div></div></div></div>
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