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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Scotty:<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">I thought of a couple of questions for you after Saturday’s meeting.
<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">1.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Since (inside the Tangerine) a given DE will always be paired with the same SBC, I would think that we would not need a “discovery” sequence between
them like with the HPSDR. What would be the best way to configure the SBC and the DE to be aware of each other? Enter the DE’s MAC address in a configuration screen on the SBC?<o:p></o:p></span></p>
<p class="MsoListParagraph" style="text-indent:-.25in;mso-list:l0 level1 lfo1"><![if !supportLists]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><span style="mso-list:Ignore">2.<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">For the best security, the Tangerine should not respond to arbitrary IP traffic, but should be the one to initiate connections. If we do it that way,
once again, I would think that we don’t need an HPSDR “discovery” sequence. In use case 1 (Data Collection mode), the Tangerine has the token issued from Central Control and initiates connection to that; in use case 2 (Firehose), the user puts the IP address(es)
of the local big computers to stream data to. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">What do you think? -73- Bill AB4EJ<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"> TangerineSDR <tangerinesdr-bounces@lists.tapr.org>
<b>On Behalf Of </b>Scotty Cowling via TangerineSDR<br>
<b>Sent:</b> Tuesday, May 14, 2019 3:01 PM<br>
<b>To:</b> tangerinesdr@lists.tapr.org<br>
<b>Cc:</b> Scotty Cowling <scotty@tonks.com><br>
<b>Subject:</b> Re: [TangerineSDR] Uploading congestion<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Hi Bill,<br>
<br>
Also, the PSWS will consume mostly upload bandwidth, while entertainment generally consumes download bandwidth. So on full duplex links there should be less of a problem<o:p></o:p></p>
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<p class="MsoNormal">On 2019-05-14 16:00, Phil Erickson via TangerineSDR wrote:<o:p></o:p></p>
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<p class="MsoNormal">Hi Bill,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Something to consider is the imminent explosion of always available satellite internet (Starlink, etc.). It is real and happening now. Starlink is due to be functioning by 2021; not long. So one has to balance the way things are now versus
what they will be in the near future.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">73<o:p></o:p></p>
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<p class="MsoNormal">Phil<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">On Tue, May 14, 2019 at 15:56 Engelke, Bill via TangerineSDR <<a href="mailto:tangerinesdr@lists.tapr.org">tangerinesdr@lists.tapr.org</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">To all – here is something to think about. I recently got my SatNOGS telemetry copying system working in full automatic mode, which means it runs almost continuously collecting
and uploading spectrum data from passing birds. In doing work that needs some real-time bandwidth (using remote terminal), I notice frequent lag times in response, which I attribute to IP congestion, i.e., the SatNOGS box is uploading a lot of spectrum data,
and this uploading monopolizes my internet connection. <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">This is something that we are going to have to contend with for home users. I can realistically foresee that guys will be forbidden by their families from running the PSWS when
Game of Thrones is on Hulu, because of contention for bandwidth. The Game of Thrones reference is kind of a joke, but it won’t be funny when this very real issue affects science uploads.
<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">It should be possible to design some ways to throttle the upload, or block certain hours, or something. Just please keep your thinking cap on…<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">W. D. Engelke (Bill), Asst. Research Engr.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Center for Advanced Public Safety<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Cyber Hall<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">The University of Alabama<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Tuscaloosa, AL 35487<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Desk: (205) 348-7244<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Mobile: (205) 764-3099<o:p></o:p></p>
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<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
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<p class="MsoNormal">-- <br>
TangerineSDR mailing list<br>
<a href="mailto:TangerineSDR@lists.tapr.org" target="_blank">TangerineSDR@lists.tapr.org</a><br>
<a href="http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org" target="_blank">http://lists.tapr.org/mailman/listinfo/tangerinesdr_lists.tapr.org</a><o:p></o:p></p>
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<p class="MsoNormal">-- <o:p></o:p></p>
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<p class="MsoNormal">----<br>
Phil Erickson<br>
<a href="mailto:phil.erickson@gmail.com" target="_blank">phil.erickson@gmail.com</a><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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