<span style=" font-size:10pt;font-family:sans-serif">Hi Simon,</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">in the case below
(transmission of status report requested), I would suggest that the intermediate
node which cannot process the extension block, would only send a BSR once
(or every n bundles). I think this would be perfectly valid (although not
required) per BPv7:</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">"</span><tt><span style=" font-size:10pt">Moreover,
even when</span></tt>
<br><tt><span style=" font-size:10pt">the generation of status reports
is enabled the decision on whether</span></tt>
<br><tt><span style=" font-size:10pt">or not to generate a requested status
report is left to the</span></tt>
<br><tt><span style=" font-size:10pt">discretion of the bundle protocol
agent.</span></tt><span style=" font-size:10pt;font-family:sans-serif">"</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Regards,</span>
<br><span style=" font-size:10pt;font-family:sans-serif">Felix</span>
<br>
<br>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">From:
</span><span style=" font-size:9pt;font-family:sans-serif">"Simon
Singh" <simon.singh@eknoworks.com></span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">To:
</span><span style=" font-size:9pt;font-family:sans-serif">Felix.Flentge@esa.int</span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Cc:
</span><span style=" font-size:9pt;font-family:sans-serif">"SIS-DTN"
<sis-dtn-bounces@mailman.ccsds.org>, "Sanchez Net, Marc (US
332H)" <marc.sanchez.net@jpl.nasa.gov>, "Pitts, Robert
L. (MSFC-HP27)[HOSC SERVICES CONTRACT]" <robert.l.pitts@nasa.gov>,
"Dr. Keith L Scott" <kscott@mitre.org></span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Date:
</span><span style=" font-size:9pt;font-family:sans-serif">02/09/2021
16:38</span>
<br><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif">Subject:
</span><span style=" font-size:9pt;font-family:sans-serif">Re:
Compressed Bundle Reporting (CBR) & Custody Transfer</span>
<br>
<hr noshade>
<br>
<br>
<br><span style=" font-size:12pt">Hi Felix,</span>
<br>
<br><span style=" font-size:12pt">I had been thinking about compressing
BSR to combat the problem of proliferation of the BSRs, again along the
same approach as used in Custody Signal. However, BSR would still
go to the report_to EID, as originally intended (note that it could source_EID
as well).</span>
<br>
<br><span style=" font-size:12pt">I see that your primary focus is towards
some mechanism similar to custody transfer, though not replacing CT, as
you already noted. Looks like things can be improved by compressing BSR. </span>
<br><span style=" font-size:12pt">There is also a somewhat related problem
where BSR is needed but there is no need for multiple BSR. E.g. when a
node is not capable of processing a new extension block (just like
a new defined CREB - </span><span style=" font-size:10pt;font-family:sans-serif">Compressed
Reporting Extension Block ) and extension block is requesting
a BSR (see below for requesting flag definition). Once we know that the
node can't process this kind of block, there is no need for BSR for each
bundle containing the offending extension block.</span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">// for reference</span>
<p style="margin-top:0px;margin-Bottom:0px"><tt><span style=" font-size:12pt">.
Bit 1(0x02): transmission of a status report is requested
if block can't be processed.</span></tt></p>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">Another suggestion
would be to see if Custody Signal can be improved by including more than
one Disposition Codes. Currently, it is confined to one Disposition Code.
So, if the next custodian wants to send back two different disposition codes
(e.g. it accepted some bundles, but then ran out space and rejected custody
for the rest of the bundles), then it would need to send two different
CSs. </span>
<br>
<br><span style=" font-size:10pt;font-family:sans-serif">There is also
a problem of losing a CS. It can trigger a number of retransmissions. The
problem is that the reliability of the CS is the same as the reliability
of a normal bundle. </span>
<br>
<br><span style=" font-size:12pt">I look forward to your presentation.</span>
<br>
<br><span style=" font-size:12pt">Best regards</span>
<br><span style=" font-size:12pt">Simon Singh</span>
<br><span style=" font-size:12pt">+1 443 538 7176 Cell</span>
<br>
<br>
<br><span style=" font-size:12pt">On Thu, Sep 2, 2021 at 9:38 AM <</span><a href=mailto:Felix.Flentge@esa.int><span style=" font-size:12pt;color:blue"><u>Felix.Flentge@esa.int</u></span></a><span style=" font-size:12pt">>
wrote:</span>
<br><span style=" font-size:10pt;font-family:sans-serif">Dear All,</span><span style=" font-size:12pt">
<br>
</span><span style=" font-size:10pt;font-family:sans-serif"><br>
just to let you know: we have started discussing/working/prototyping a
'Compressed Bundle Reporting' mechanism which we intend to use as a replacement
for BPv6 custody transfer in some scenarios. The basic idea is to define:</span><span style=" font-size:12pt">
<br>
</span><span style=" font-size:10pt;font-family:sans-serif"><br>
a) a Compressed Reporting Extension Block (CREB) which allows to request
reporting of bundle reception, delivery, forwarding or deletion</span><span style=" font-size:12pt">
</span><span style=" font-size:10pt;font-family:sans-serif"><br>
b) a Compressed Reporting Signal (CRS) administrative record to efficiently
report of reception/delivery/forwarding/deletion as requested (using a
similar transmission ID approach as in BIBE)</span><span style=" font-size:12pt">
<br>
</span><span style=" font-size:10pt;font-family:sans-serif"><br>
The reporting signals will be provided to the sending application which
could eg keep a record which bundles have been received by an intermediate
node.</span><span style=" font-size:12pt"> </span><span style=" font-size:10pt;font-family:sans-serif"><br>
In our scenarios, we would trigger re-sending of bundles which have not
been reported as received by an explicit application level command (thus
avoiding the timers).</span><span style=" font-size:12pt"> <br>
</span><span style=" font-size:10pt;font-family:sans-serif"><br>
I assume such a mechanism could be useful to others as well in scenarios
where one would have applied BPv6 custody transfers. The difference to
BIBE-CT is mainly:</span><span style=" font-size:12pt"> </span>
<ul>
<li><span style=" font-size:10pt;font-family:sans-serif">no timers; no
re-transmission as part of the protocol (the application decides what to
do)</span><span style=" font-size:12pt"> </span>
<li><span style=" font-size:10pt;font-family:sans-serif">we do not need
to know in advance which node will send a response; in our case, we are
just interested to know whether a bundle has been received by some ground
node as we can assume terrestrial bundle transfer to be reliable (based
on TCPCL).</span><span style=" font-size:12pt"> </span></ul><span style=" font-size:10pt;font-family:sans-serif">I
should maybe stress that this mechanism does not allow for a real replacement
of BPv6 custody transfer as re-transmission would be always done from the
source node (intermediate nodes do not take custody; at least, unless specific
applications for that would be implemented). In this sense, there is some
similarity with DTPC Transmission Service without in-sequence delivery
but getting reporting signals from intermediate nodes (actually, it may
be interesting to see whether an updated DTCP could make use of CRS containing
delivery signals).</span><span style=" font-size:12pt"> <br>
</span><span style=" font-size:10pt;font-family:sans-serif"><br>
Anyway, I would suggest to present and discuss these ideas in more detail
in one of the next WG meetings.</span><span style=" font-size:12pt"> <br>
</span><span style=" font-size:10pt;font-family:sans-serif"><br>
Regards,</span><span style=" font-size:12pt"> </span><span style=" font-size:10pt;font-family:sans-serif"><br>
Felix</span><span style=" font-size:12pt"> <br>
<br>
<br>
</span><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif"><br>
From: </span><span style=" font-size:9pt;font-family:sans-serif">"Dr.
Keith L Scott" <</span><a href=mailto:kscott@mitre.org target=_blank><span style=" font-size:9pt;color:blue;font-family:sans-serif"><u>kscott@mitre.org</u></span></a><span style=" font-size:9pt;font-family:sans-serif">></span><span style=" font-size:12pt">
</span><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif"><br>
To: </span><span style=" font-size:9pt;font-family:sans-serif">"Sanchez
Net, Marc (US 332H)" <</span><a href=mailto:marc.sanchez.net@jpl.nasa.gov target=_blank><span style=" font-size:9pt;color:blue;font-family:sans-serif"><u>marc.sanchez.net@jpl.nasa.gov</u></span></a><span style=" font-size:9pt;font-family:sans-serif">>,
"Simon Singh" <</span><a href=mailto:simon.singh@eknoworks.com target=_blank><span style=" font-size:9pt;color:blue;font-family:sans-serif"><u>simon.singh@eknoworks.com</u></span></a><span style=" font-size:9pt;font-family:sans-serif">>,
"Pitts, Robert L. (MSFC-HP27)[HOSC SERVICES CONTRACT]" <</span><a href=mailto:robert.l.pitts@nasa.gov target=_blank><span style=" font-size:9pt;color:blue;font-family:sans-serif"><u>robert.l.pitts@nasa.gov</u></span></a><span style=" font-size:9pt;font-family:sans-serif">></span><span style=" font-size:12pt">
</span><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif"><br>
Cc: </span><span style=" font-size:9pt;font-family:sans-serif">"</span><a href="mailto:sis-dtn@mailman.ccsds.org" target=_blank><span style=" font-size:9pt;color:blue;font-family:sans-serif"><u>sis-dtn@mailman.ccsds.org</u></span></a><span style=" font-size:9pt;font-family:sans-serif">"
<</span><a href="mailto:sis-dtn@mailman.ccsds.org" target=_blank><span style=" font-size:9pt;color:blue;font-family:sans-serif"><u>sis-dtn@mailman.ccsds.org</u></span></a><span style=" font-size:9pt;font-family:sans-serif">></span><span style=" font-size:12pt">
</span><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif"><br>
Date: </span><span style=" font-size:9pt;font-family:sans-serif">01/09/2021
19:30</span><span style=" font-size:12pt"> </span><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif"><br>
Subject: </span><span style=" font-size:9pt;font-family:sans-serif">Re:
[Sis-dtn] [EXTERNAL] Custody Transfer query</span><span style=" font-size:12pt">
</span><span style=" font-size:9pt;color:#5f5f5f;font-family:sans-serif"><br>
Sent by: </span><span style=" font-size:9pt;font-family:sans-serif">"SIS-DTN"
<</span><a href="mailto:sis-dtn-bounces@mailman.ccsds.org" target=_blank><span style=" font-size:9pt;color:blue;font-family:sans-serif"><u>sis-dtn-bounces@mailman.ccsds.org</u></span></a><span style=" font-size:9pt;font-family:sans-serif">></span><span style=" font-size:12pt">
<br>
</span>
<hr noshade><span style=" font-size:12pt"><br>
</span>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">A
little expansion;</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:10pt;font-family:sans-serif">1.
</span><span style=" font-size:11pt;font-family:Calibri">With
BPv6 custody transfer, nodes are not REQUIRED to take custody; a node may
simply forward a bundle without taking custody, leaving the current custodian
alone. This exacerbates the problem of trying to set a retransmission
timer since the current custodian doesn’t have a protocol-enforced contract
for who the next custodian will be.</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:10pt;font-family:sans-serif">2.
</span><span style=" font-size:11pt;font-family:Calibri">The
above problem is FURTHER exacerbated by fragmentation (though *<b>I</b>*
believe this is largely semantic and that workable solutions exist).
The ideas is that if I’m the custodian for a 1,000-byte bundle, and somebody
downstream fragments it without taking custody, I can now get custody-acceptance
signals for pieces of that bundle – pieces I never knew existed.
So what do I do, especially if the retransmission timer (that I had trouble
setting inf the first place) goes off? Do I retransmit the entire
bundle, do I make fragments out of the bundle I have and retransmit all
the un-custody-acked pieces?</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">So,
in lieu of trying to solve the above, we opted for an approach where the
custodian gets to affirmatively KNOW who’s going to take custody, and
as a side-effect of BIBE-tunneling the custodial bundle to the next custodian,
we can assert that the next custodial can/will take custody of the ENTIRE
bundle.</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Not
*<b>my</b>* favorite solution, but there are definitely benefits.</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">
v/r,</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">
--keith</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:240px"><span style=" font-size:12pt;font-family:Calibri"><b>From:
</b>SIS-DTN <</span><a href="mailto:sis-dtn-bounces@mailman.ccsds.org" target=_blank><span style=" font-size:12pt;color:blue;font-family:Calibri"><u>sis-dtn-bounces@mailman.ccsds.org</u></span></a><span style=" font-size:12pt;font-family:Calibri">>
on behalf of Sanchez Net, Marc (US 332H) via SIS-DTN <</span><a href="mailto:sis-dtn@mailman.ccsds.org" target=_blank><span style=" font-size:12pt;color:blue;font-family:Calibri"><u>sis-dtn@mailman.ccsds.org</u></span></a><span style=" font-size:12pt;font-family:Calibri">><b><br>
Date: </b>Friday, August 20, 2021 at 11:41 AM<b><br>
To: </b>Simon Singh <</span><a href=mailto:simon.singh@eknoworks.com target=_blank><span style=" font-size:12pt;color:blue;font-family:Calibri"><u>simon.singh@eknoworks.com</u></span></a><span style=" font-size:12pt;font-family:Calibri">>,
Pitts, Robert L. (MSFC-HP27)[HOSC SERVICES CONTRACT] <</span><a href=mailto:robert.l.pitts@nasa.gov target=_blank><span style=" font-size:12pt;color:blue;font-family:Calibri"><u>robert.l.pitts@nasa.gov</u></span></a><span style=" font-size:12pt;font-family:Calibri">><b><br>
Cc: </b></span><a href="mailto:sis-dtn@mailman.ccsds.org" target=_blank><span style=" font-size:12pt;color:blue;font-family:Calibri"><u>sis-dtn@mailman.ccsds.org</u></span></a><span style=" font-size:12pt;font-family:Calibri">
<</span><a href="mailto:sis-dtn@mailman.ccsds.org" target=_blank><span style=" font-size:12pt;color:blue;font-family:Calibri"><u>sis-dtn@mailman.ccsds.org</u></span></a><span style=" font-size:12pt;font-family:Calibri">><b><br>
Subject: </b>Re: [Sis-dtn] [EXTERNAL] Custody Transfer query</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">I
believe one of the main reasons for the switch of custody transfer to BIBE
is the inability to meaningfully/properly set the custody transfer retransmission
timer in BPv6. This happens because at the Bundle Layer there is no way
to tell which route a bundle will take to destination, or whether it will
be fragmented on its way to it, so it is impossible to figure out what
is a good value of the retransmit timer.</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">BIBE
is supposed to be a convergence layer for the Bundle Protocol which acts
as a hop-to-hop protocol rather than an end-to-end protocol. Therefore,
since in BIBE you know explicitly which is the destination node to which
the bundle will be sent, and there is no possibility for further fragmentation,
you can have a better idea of the correct value for the retransmission
timer (much like in LTP).</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">BIBE’s
other motivation is security. By allowing you to encapsulate a bundle within
another bundle, you can achieve functionality that is similar to a VPN
in which encapsulated bundles are fully encrypted and possibly authenticated
(fully meaning that both the payload and the header are encrypted).</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">-----------------------------------------------------------------------------------------------------------------------</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Marc
Sanchez Net</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:10pt;color:#808080;font-family:Calibri">Telecommunications
Engineer</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:10pt;color:#808080;font-family:Calibri">Jet
Propulsion Laboratory</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:10pt;color:#808080;font-family:Calibri">Office:</span><span style=" font-size:10pt;color:#2f2f2f;font-family:Arial">
</span><a href="tel:(818)%20393-5840" target=_blank><span style=" font-size:10pt;color:#0082bf;font-family:Arial"><u>(818)
354-1650</u></span></a><span style=" font-size:10pt;color:#0082bf;font-family:Arial">
</span><span style=" font-size:10pt;color:#808080;font-family:Calibri">|</span><span style=" font-size:10pt;color:#0082bf;font-family:Arial">
</span><span style=" font-size:10pt;color:#808080;font-family:Calibri">Email:</span><span style=" font-size:10pt;color:#2f2f2f;font-family:Arial">
</span><a href=mailto:marc.sanchez.net@jpl.nasa.gov target=_blank><span style=" font-size:10pt;color:blue;font-family:Arial"><u>marc.sanchez.net@jpl.nasa.gov</u></span></a></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">-----------------------------------------------------------------------------------------------------------------------</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"><b>From:</b>
SIS-DTN <</span><a href="mailto:sis-dtn-bounces@mailman.ccsds.org" target=_blank><span style=" font-size:11pt;color:blue;font-family:Calibri"><u>sis-dtn-bounces@mailman.ccsds.org</u></span></a><span style=" font-size:11pt;font-family:Calibri">>
<b>On Behalf Of </b>Simon Singh<b><br>
Sent:</b> Friday, August 20, 2021 8:09 AM<b><br>
To:</b> Pitts, Robert L. (MSFC-HP27)[HOSC SERVICES CONTRACT] <</span><a href=mailto:robert.l.pitts@nasa.gov target=_blank><span style=" font-size:11pt;color:blue;font-family:Calibri"><u>robert.l.pitts@nasa.gov</u></span></a><span style=" font-size:11pt;font-family:Calibri">><b><br>
Cc:</b> </span><a href="mailto:sis-dtn@mailman.ccsds.org" target=_blank><span style=" font-size:11pt;color:blue;font-family:Calibri"><u>sis-dtn@mailman.ccsds.org</u></span></a><span style=" font-size:11pt;font-family:Calibri"><b><br>
Subject:</b> Re: [Sis-dtn] [EXTERNAL] Custody Transfer query</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Thanks
Lee.</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">I
came across this, probably from Scott Burleigh. Any idea about "<b>serious
potential operational anomalies."</b></span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">"</span><span style=" font-size:11pt;font-family:Symbol">·</span><span style=" font-size:7pt;font-family:Times New Roman">
</span><span style=" font-size:11pt;font-family:Calibri">The
“<b>custody transfer</b>” function is removed from BP and is defined
instead in a new bundle-in-bundle encapsulation specification, to improve
its efficiency and address several <b>serious potential operational anomalies</b>."</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Best
regards</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Simon
Singh</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">+1
443 538 7176 Cell</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">On
Fri, Aug 20, 2021 at 8:16 AM Pitts, Robert L. (MSFC-HP27)[HOSC SERVICES
CONTRACT] <</span><a href=mailto:robert.l.pitts@nasa.gov target=_blank><span style=" font-size:11pt;color:blue;font-family:Calibri"><u>robert.l.pitts@nasa.gov</u></span></a><span style=" font-size:11pt;font-family:Calibri">>
wrote:</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;color:#004080;font-family:Calibri">I
don’t know the exact reason but it was initiated in the IETF. Scott
may be a better source.</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;color:#004080;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;color:#004080;font-family:Calibri">Lee</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;color:#004080;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"><b>From:</b>
SIS-DTN <</span><a href="mailto:sis-dtn-bounces@mailman.ccsds.org" target=_blank><span style=" font-size:11pt;color:blue;font-family:Calibri"><u>sis-dtn-bounces@mailman.ccsds.org</u></span></a><span style=" font-size:11pt;font-family:Calibri">>
<b>On Behalf Of </b>Simon Singh<b><br>
Sent:</b> Friday, August 20, 2021 1:52 AM<b><br>
To:</b> Blanding, Beau T. (MSFC-HP27)[HOSC SERVICES CONTRACT] <</span><a href=mailto:beau.t.blanding@nasa.gov target=_blank><span style=" font-size:11pt;color:blue;font-family:Calibri"><u>beau.t.blanding@nasa.gov</u></span></a><span style=" font-size:11pt;font-family:Calibri">>;
</span><a href="mailto:sis-dtn@mailman.ccsds.org" target=_blank><span style=" font-size:11pt;color:blue;font-family:Calibri"><u>sis-dtn@mailman.ccsds.org</u></span></a><span style=" font-size:11pt;font-family:Calibri"><b><br>
Subject:</b> [EXTERNAL] [Sis-dtn] Custody Transfer query</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Hi,</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">I
would appreciate it if someone can provide insight regarding the following
query.. Thanks</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">What
was the motivation to move from BP6 style of custody transfer to one using
BIBE?</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Best
regards</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Simon
Singh</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">+1
443 538 7176 Cell</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">On
Thu, Aug 12, 2021 at 7:58 AM Blanding, Beau T. (MSFC-HP27)[HOSC SERVICES
CONTRACT] via SIS-DTN <</span><a href="mailto:sis-dtn@mailman.ccsds.org" target=_blank><span style=" font-size:11pt;color:blue;font-family:Calibri"><u>sis-dtn@mailman.ccsds.org</u></span></a><span style=" font-size:11pt;font-family:Calibri">>
wrote:</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Good
morning all,</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Attached
are BPv7 Red Book Discussion Topics from MSFC. We (MSFC) provide our opinions
on how the topics listed within should be managed. Please provide your
input via email on these topics so that we may take them into account as
we write sections for the BPv7 book. If we run into a discussion that isn’t
resolving over email, we will resolve in the SIS-DTN forum.</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Regards,</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:16pt;font-family:Calibri">Beau
Blanding</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">HOSC
Systems Engineer</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">MSFC
4663, Office C121</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><a href=mailto:beau.t.blanding@nasa.gov target=_blank><span style=" font-size:11pt;color:blue;font-family:Calibri"><u>beau.t.blanding@nasa.gov</u></span></a></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">-----Original
Appointment-----<b><br>
From:</b> Dr. Keith L Scott <</span><a href=mailto:kscott@mitre.org target=_blank><span style=" font-size:11pt;color:blue;font-family:Calibri"><u>kscott@mitre.org</u></span></a><span style=" font-size:11pt;font-family:Calibri">>
<b><br>
Sent:</b> Wednesday, April 7, 2021 9:47 AM<b><br>
To:</b> Dr. Keith L Scott; </span><a href="mailto:sis-dtn@mailman.ccsds.org" target=_blank><span style=" font-size:11pt;color:blue;font-family:Calibri"><u>sis-dtn@mailman.ccsds.org</u></span></a><span style=" font-size:11pt;font-family:Calibri"><b><br>
Cc:</b> Navas, Tiffany A. (GSFC-581.0)[MTI SYSTEMS, INC.]; Torgerson, J.
Leigh (JPL-332C)[JPL Employee]; HAMILTON, PAUL A. (JSC-EV811); Matusow,
Carla L. (GSFC-4502); Strege, Susanne L. (GSFC-5830); LACY, SETH L DR-04
USAF AFMC AFRL/RVEN; Mayer, Jeremy P. (JSC-OT/ESA)[EUROPEAN SPACE AGENCY];
Burleigh, Scott C (JPL-312B)[JPL Employee]; Deaton, Joshua E. (MSFC-HP27)[HOSC
SERVICES CONTRACT]; </span><a href=mailto:Gian.Paolo.Calzolari@esa.int target=_blank><span style=" font-size:11pt;color:blue;font-family:Calibri"><u>Gian.Paolo.Calzolari@esa.int</u></span></a><span style=" font-size:11pt;font-family:Calibri">;
</span><a href=mailto:Felix.Flentge@esa.int target=_blank><span style=" font-size:11pt;color:blue;font-family:Calibri"><u>Felix.Flentge@esa.int</u></span></a><span style=" font-size:11pt;font-family:Calibri">;
Bryant, Deann (MSFC-HP27); Wright, James R. (MSFC-HP27)[BIOSERVE Univ of
CO]; George, Sandy (MSFC-IS40)[NICS]; Heiner, Sarah E.; Kazmi, Syeda A.
(GSFC-5830); </span><a href=mailto:Tomaso.deCola@dlr.de target=_blank><span style=" font-size:11pt;color:blue;font-family:Calibri"><u>Tomaso.deCola@dlr.de</u></span></a><span style=" font-size:11pt;font-family:Calibri">;
Durkin, Alexander E. (GSFC-5830)<b><br>
Subject:</b> [EXTERNAL] [Sis-dtn] SIS-DTN Telecon<b><br>
When:</b> Wednesday, August 11, 2021 11:00 AM-12:00 PM (UTC-05:00) Eastern
Time (US & Canada).<b><br>
Where:</b> Microsoft Teams Meeting</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">20210407
– Just refreshing the calendar invite in case it got dropped somewhere.</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">Folks,</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">I’d
like to set up some recurring SIS-DTN meetings to talk about our current
work items. I’ve set these for every 2 weeks; if it looks like we
don’t need to meet that often I’ll drop it down to monthly.</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">I’m
proposing Wednesdays 11am; I get that this time won’t work for everyone,
but let’s see how many can make it and if we have to we’ll hunt for a
different time.</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">
v/r,</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri"> </span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">
--keith</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;color:#5f5f5f;font-family:Calibri">________________________________________________________________________________</span><span style=" font-size:11pt;font-family:Calibri">
</span></p>
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<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;color:#5f5f5f;font-family:Calibri">________________________________________________________________________________</span><span style=" font-size:11pt;font-family:Calibri">
</span></p>
<p style="margin-top:0px;margin-Bottom:0px"><span style=" font-size:11pt;font-family:Calibri">_______________________________________________<br>
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</u></span><a href="https://mailman.ccsds.org/cgi-bin/mailman/listinfo/sis-dtn" target=_blank><tt><span style=" font-size:10pt;color:blue"><u>https://mailman.ccsds.org/cgi-bin/mailman/listinfo/sis-dtn</u></span></tt></a></p>
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