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<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Scott,</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I agree with your choices. UDP
delivers datagrams (complete messages) to the application, so it is quite easy
to get started with. In fact, I would recommend that our first attempts
at interoperability testing use UDP for both Meta-AMS and AMS messages.</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>One or two questions: Given that TCP
is a bitstream protocol, when it is used to carry messages, there is typically
some sort of header that is added in front of each message (to allow the
receiver to detect message boundaries). If we use TCP, will we add a
header to the ‘raw’ AMS message? And if so, have we agreed on
the format of that header?</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Tim</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<div>
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<p class=MsoNormal><b><font size=2 color=black face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight:bold'>From:</span></font></b><font
size=2 color=black face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:windowtext'> sis-ams-bounces@mailman.ccsds.org
[mailto:sis-ams-bounces@mailman.ccsds.org] <b><span style='font-weight:bold'>On
Behalf Of </span></b>Scott Burleigh<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, May 08, 2008 1:16
PM<br>
<b><span style='font-weight:bold'>To:</span></b> sis-ams@mailman.ccsds.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Sis-ams]
Interoperability testing - transfer protocols</span></font></p>
</div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'> </span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Ray, Timothy J. (GSFC-583.0) wrote: </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hello all,</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>As an implementer of software to support
interoperability testing, there are certain decisions that I have to
make. Two key decisions are:</span></font></p>
<p class=MsoNormal style='margin-left:.5in;text-indent:-.25in'><font size=2
color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>1)</span></font><font size=1 color=navy><span style='font-size-adjust: none;
font-stretch: normal'><span style='font-size:7.0pt;color:navy'>
</span></span></font><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>What protocol(s) to support for
transferring Meta-AMS messages</span></font></p>
<p class=MsoNormal style='margin-left:.5in;text-indent:-.25in'><font size=2
color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>2)</span></font><font size=1 color=navy><span style='font-size-adjust: none;
font-stretch: normal'><span style='font-size:7.0pt;color:navy'>
</span></span></font><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>What protocol(s) to support for transferring
AMS messages directly between nodes</span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Has our working group decided what, as a
minimum, is required for our interoperability testing?</span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>My candidates would be UDP for (1) and both UDP and
TCP for (2). Lots of others make sense in specialized contexts but might
be hard to provide to everyone involved in an interoperation test.<br>
<br>
Scott</span></font></p>
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