<HTML>
<HEAD>
<TITLE>Re: [Sls-slp] JAXA RID against OID Frame</TITLE>
</HEAD>
<BODY>
<FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'>I agree with Matt and Gian Paolo. If you want to send a packet with a meaningful secondary header and no useful information thengive it an APID with that interpretation, not one that says it only contains idle data. Have a wonderful time discussing this trivia. <BR>
<BR>
<BR>
On 3/4/09 1:59 AM, "Cosby Matthew" <MCOSBY@qinetiq.com> wrote:<BR>
<BR>
</SPAN></FONT><BLOCKQUOTE><FONT COLOR="#000080"><FONT SIZE="4"><FONT FACE="Arial"><SPAN STYLE='font-size:13.0px'>Greg,<BR>
<BR>
I agree with Gian Paolo. <BR>
<BR>
When our TM systems detect an Idle Packet (APID set to 0x7FF) it discards it. <BR>
<BR>
>From the TM Spec.<BR>
</SPAN></FONT></FONT></FONT><FONT SIZE="4"><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:14.0px'><B>4.3.2.5 </B>Extracted Packets shall be delivered to the users on the basis of the PVN in their header. Incomplete Packets are not required to be delivered in cross support situations. <BR>
</SPAN></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'><BR>
</SPAN><FONT SIZE="4"><SPAN STYLE='font-size:14.0px'>NOTE . Idle Packets are discarded. Data Fields that contain only Idle Data are also discarded.<BR>
</SPAN></FONT></FONT><FONT SIZE="4"><FONT COLOR="#000080"><FONT FACE="Arial"><SPAN STYLE='font-size:13.0px'> <BR>
This states that the Idle Packet is discarded and implies that there is no user data within the packet. There probability isn’t any where in the standard stating that you can’t put a secondary header in the Idle Packet, but this is implied as this packet is thrown out. So quoting Gian Paolo it would be crazy to put any useful data into the idle packet.<BR>
<BR>
Regards,<BR>
<BR>
Matt.<BR>
</SPAN></FONT></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'><BR>
</SPAN></FONT><FONT COLOR="#000080"><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10.0px'>Matthew Cosby<BR>
<BR>
QinetiQ<BR>
Bldg X107 Rm G003<BR>
Cody Technology Park<BR>
Ively Road, Farnborough<BR>
Hants, GU14 0LX<BR>
</SPAN></FONT></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'> <BR>
</SPAN></FONT><FONT COLOR="#000080"><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10.0px'>Tel: </SPAN></FONT></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'> </SPAN></FONT><FONT COLOR="#000080"><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10.0px'>01252 396313 </SPAN></FONT></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'> <BR>
</SPAN></FONT><FONT COLOR="#000080"><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10.0px'>Email: </SPAN></FONT></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'> </SPAN></FONT><FONT COLOR="#000080"><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10.0px'>mcosby@QinetiQ.com </SPAN></FONT></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'> <BR>
</SPAN></FONT><FONT COLOR="#000080"><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10.0px'>Fax: </SPAN></FONT></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'> </SPAN></FONT><FONT COLOR="#000080"><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10.0px'>01252 392969 </SPAN></FONT></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'> <BR>
</SPAN></FONT><FONT COLOR="#000080"><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10.0px'>Web: </SPAN></FONT></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'> </SPAN></FONT><FONT COLOR="#000080"><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10.0px'>www.QinetiQ.com <a href="http://www.qinetiq.com"><http://www.qinetiq.com></a> </SPAN></FONT></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'> <BR>
</SPAN></FONT><FONT COLOR="#000080"><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10.0px'>QinetiQ - The Global Defence and Security Experts <BR>
</SPAN></FONT></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'><BR>
</SPAN></FONT><FONT COLOR="#339966"><FONT SIZE="6"><FONT FACE="Webdings"><SPAN STYLE='font-size:24.0px'>P </SPAN></FONT></FONT><FONT SIZE="2"><FONT FACE="Arial"><SPAN STYLE='font-size:10.0px'><I>Please consider the environment before printing this email.</I> <BR>
</SPAN></FONT></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'><BR>
</SPAN></FONT><FONT COLOR="#000080"><FONT SIZE="5"><FONT FACE="Times New Roman"><SPAN STYLE='font-size:16.0px'> <BR>
</SPAN></FONT></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'>
</SPAN></FONT>
<P ALIGN=CENTER>
<FONT SIZE="5"><FONT FACE="Times New Roman"><SPAN STYLE='font-size:16.0px'><HR ALIGN=CENTER SIZE="2" WIDTH="100%"></SPAN></FONT></FONT>
<P>
<FONT SIZE="4"><FONT FACE="Tahoma"><SPAN STYLE='font-size:13.0px'><B>From:</B> sls-slp-bounces@mailman.ccsds.org [<a href="mailto:sls-slp-bounces@mailman.ccsds.org]">mailto:sls-slp-bounces@mailman.ccsds.org]</a> <B>On Behalf Of </B>Gian.Paolo.Calzolari@esa.int<BR>
<B>Sent:</B> 03 March 2009 18:21<BR>
<B>To:</B> Kazz, Greg J<BR>
<B>Cc:</B> sls-slp@mailman.ccsds.org; Takahiro Yamada; Ray,Timothy J. (GSFC-583.0); Jean-Luc.Gerner@esa.int; sls-slp-bounces@mailman.ccsds.org; gilles.moury@cnes.fr; Greenberg,Edward<BR>
<B>Subject:</B> RE: [Sls-slp] JAXA RID against OID Frame<BR>
</SPAN></FONT></FONT><FONT SIZE="5"><FONT FACE="Times New Roman"><SPAN STYLE='font-size:16.0px'> <BR>
<BR>
<BR>
</SPAN></FONT></FONT><FONT SIZE="4"><FONT FACE="Courier New"><SPAN STYLE='font-size:13.0px'>"Kazz, Greg J" <greg.j.kazz@jpl.nasa.gov> wrote on 03-03-2009 18:21:35:<BR>
</SPAN></FONT><SPAN STYLE='font-size:13.0px'><FONT FACE="Verdana, Helvetica, Arial"><BR>
</FONT></SPAN></FONT><FONT FACE="Courier New"><SPAN STYLE='font-size:12.0px'>> G.P.,</SPAN></FONT><SPAN STYLE='font-size:12.0px'><FONT FACE="Verdana, Helvetica, Arial"> <BR>
</FONT></SPAN><FONT SIZE="4"><FONT FACE="Courier New"><SPAN STYLE='font-size:13.0px'>> <BR>
> But a Space Packet can contain a Secondary Header, which could <BR>
</SPAN></FONT></FONT><FONT FACE="Courier New"><SPAN STYLE='font-size:12.0px'>> contain useful data as well. So in that sense, OID Packet also makes<BR>
> sense. In other words, discarding an “Idle Packet” can have a <BR>
> drawback or unintended consequence. CCSDS needs to use consistent <BR>
> terminology across the board and I think that is what this JAXA rid <BR>
> is pointing out. I am looking forward to Marjorie’s responses to <BR>
> those rids as well.</SPAN></FONT><SPAN STYLE='font-size:12.0px'><FONT FACE="Verdana, Helvetica, Arial"> <BR>
</FONT></SPAN><FONT SIZE="4"><FONT FACE="Courier New"><SPAN STYLE='font-size:13.0px'>> <BR>
> thanks,</SPAN></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'> <BR>
</SPAN></FONT><FONT SIZE="4"><FONT FACE="Courier New"><SPAN STYLE='font-size:13.0px'>> <BR>
> Greg</SPAN></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'> <BR>
</SPAN></FONT><FONT SIZE="4"><FONT FACE="Courier New"><SPAN STYLE='font-size:13.0px'>> <BR>
</SPAN></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'><BR>
</SPAN></FONT><FONT SIZE="4"><FONT FACE="Courier New"><SPAN STYLE='font-size:13.0px'>Greg,</SPAN></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'> <BR>
</SPAN></FONT><FONT SIZE="4"><FONT FACE="Courier New"><SPAN STYLE='font-size:13.0px'> The Frame has a structure linked to the Virtual Channel and all frames on a VC have the secondary header (if this is used) independently they are OID or not.</SPAN></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'> <BR>
</SPAN></FONT><FONT SIZE="4"><FONT FACE="Courier New"><SPAN STYLE='font-size:13.0px'>Conversely the Space Packet has a structure linked to the APID and a mission implementing a Packet Secondary Header on Idle Packets would just be crazy. :-) In addition, I think that, being the idle APID fixed, there is no chance for having a Secondary header in an Idle Packet [this is TBC].</SPAN></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'> <BR>
<BR>
</SPAN></FONT><FONT SIZE="4"><FONT FACE="Courier New"><SPAN STYLE='font-size:13.0px'>Comments/confirmations are welcome.</SPAN></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'> <BR>
<BR>
</SPAN></FONT><FONT SIZE="4"><FONT FACE="Courier New"><SPAN STYLE='font-size:13.0px'>Ciao</SPAN></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'> <BR>
<BR>
</SPAN></FONT><FONT SIZE="4"><FONT FACE="Courier New"><SPAN STYLE='font-size:13.0px'>Gian Paolo<BR>
</SPAN></FONT></FONT><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'>The information contained in this E-Mail and any subsequent <BR>
correspondence is private and is intended solely for the intended <BR>
recipient(s). The information in this communication may be <BR>
confidential and/or legally privileged. Nothing in this e-mail is <BR>
intended to conclude a contract on behalf of QinetiQ or make QinetiQ <BR>
subject to any other legally binding commitments, unless the e-mail <BR>
contains an express statement to the contrary or incorporates a formal Purchase Order.<BR>
<BR>
For those other than the recipient any disclosure, copying, <BR>
distribution, or any action taken or omitted to be taken in reliance <BR>
on such information is prohibited and may be unlawful.<BR>
<BR>
Emails and other electronic communication with QinetiQ may be <BR>
monitored and recorded for business purposes including security, audit <BR>
and archival purposes. Any response to this email indicates consent <BR>
to this.<BR>
<BR>
Telephone calls to QinetiQ may be monitored or recorded for quality <BR>
control, security and other business purposes.<BR>
<BR>
QinetiQ Limited<BR>
Registered in England & Wales: Company Number:3796233<BR>
Registered office: 85 Buckingham Gate, London SW1E 6PD, United Kingdom<BR>
Trading address: Cody Technology Park, Cody Building, Ively Road, Farnborough, Hampshire, GU14 0LX, United Kingdom <BR>
<a href="http://www.qinetiq.com/home/notices/legal.html">http://www.qinetiq.com/home/notices/legal.html</a> <a href="http://www.QinetiQ.com/home/legal.html"><http://www.QinetiQ.com/home/legal.html></a> <BR>
<BR>
</SPAN></FONT></BLOCKQUOTE><FONT FACE="Verdana, Helvetica, Arial"><SPAN STYLE='font-size:12.0px'><BR>
</SPAN></FONT>
</BODY>
</HTML>