From greg.j.kazz at jpl.nasa.gov Mon Aug 4 20:13:29 2008 From: greg.j.kazz at jpl.nasa.gov (Greg Kazz) Date: Mon, 04 Aug 2008 13:13:29 -0700 Subject: [Sls-slp] CCSDS Lunar Wireless Workshop Message-ID: <6.2.3.4.2.20080804130801.031c99e8@mail.jpl.nasa.gov> Dear WG members, Please take a look at the CCSDS web site for the schedule of Oct. technical meetings (Oct. 13-17) in Berlin and examine the call for papers in support of the Lunar surface wireless comm and nav workshop on Oct 13 (Monday) at the Fall CCSDS Meetings in Berlin, Germany. Attached is the pdf file describing the call for papers. best regards, Greg Kazz Chairman SLS-HRU, SLS-SLP, SIS-IPO -------------- next part -------------- A non-text attachment was scrubbed... Name: Lunar_surface_Wireless_Comm_Nav_WS.pdf Type: application/octet-stream Size: 633661 bytes Desc: not available URL: From greg.j.kazz at jpl.nasa.gov Thu Aug 7 21:46:31 2008 From: greg.j.kazz at jpl.nasa.gov (Greg Kazz) Date: Thu, 07 Aug 2008 14:46:31 -0700 Subject: [Sls-slp] Tentative SLS-SLP Agenda Berlin Meeting Message-ID: <6.2.3.4.2.20080807142817.02e342f8@mail.jpl.nasa.gov> All, CCSDS SLS-SLP WG plans to meet at DIN in Berlin on Thursday Oct 16 PM. Tentative agenda SLS-SLP: 1. RID against Encapsulation Service (adding new PID for IP header compression) 2. Status of 'OID' frame update in TM and AOS 3. Space Packet Protocol Green Book 4. ESA Proposal for Systematic TC Retransmission Please let me know if you have any other agenda topics to add. thanks, Greg Kazz Chairman CCSDS SLS-SLP WG From greg.j.kazz at jpl.nasa.gov Thu Aug 7 22:38:06 2008 From: greg.j.kazz at jpl.nasa.gov (Greg Kazz) Date: Thu, 07 Aug 2008 15:38:06 -0700 Subject: [Sls-slp] Fwd: SLS-SLP input for Repeated TC Frame Transmission Message-ID: <6.2.3.4.2.20080807153722.02e03a00@mail.jpl.nasa.gov> All, Please find attached the TC retransmit proposal from ESA. For discussion at the SLS-SLP WG meeting in Berlin. best regards, Greg >Subject: SLS-SLP input for Repeated TC Frame Transmission >To: "Greg J. Kazz" >X-Mailer: Lotus Notes Release 6.5.5 November 30, 2005 >From: Gian.Paolo.Calzolari at esa.int >Date: Mon, 10 Mar 2008 20:51:30 +0100 >X-MIMETrack: Serialize by Router on esocmta1/esoc/ESA at 03/10/2008 20:51:37 >X-Source-IP: esacom89-ext.esoc.esa.int [131.176.86.4] >X-Source-Sender: Gian.Paolo.Calzolari at esa.int >X-JPL-spam-score: 0.00% > >Here it is >Ciao > >Gian Paolo > > > > >(See attached file: TCretransmit2.doc) -------------- next part -------------- A non-text attachment was scrubbed... Name: TCretransmit2.doc Type: application/octet-stream Size: 72192 bytes Desc: not available URL: From greg.j.kazz at jpl.nasa.gov Fri Aug 8 21:53:06 2008 From: greg.j.kazz at jpl.nasa.gov (Greg Kazz) Date: Fri, 08 Aug 2008 14:53:06 -0700 Subject: [Sls-slp] RID: Protocol Shim for IP Message-ID: <6.2.3.4.2.20080808144247.02e34778@mail.jpl.nasa.gov> All, Attached is a new RID submitted by NASA that enables the CCSDS Encapsulation of header compressed IP datagrams as well as non-compressed IP datagrams. It is written in support of the NASA Constellation Program which has a requirement to do IP header compression. In this case, a single octet is added just after the Encapsulation packet header by the protocol shim. (The Encapsulation Service is not modified). This RID does create a change to the CCSDS Space Link Identifiers Blue Book by requiring changes to the Protocol ID table. The text of the RID is attached as a text file and is on the CCSDS web site under the IP over CCSDS RED-2 document. This RID will be discussed both in the SLS-SLP WG as well as the SIS-IPO WG meetings in Berlin. Please let me know if you have any questions or comments beforehand. Best regards, Greg Kazz Chairman CCSDS SLS-SLP and SIS-IPO WGs -------------- next part -------------- A non-text attachment was scrubbed... Name: Walsh_RID.txt Type: application/octet-stream Size: 10190 bytes Desc: not available URL: From greg.j.kazz at jpl.nasa.gov Mon Aug 11 19:29:56 2008 From: greg.j.kazz at jpl.nasa.gov (Greg Kazz) Date: Mon, 11 Aug 2008 12:29:56 -0700 Subject: Fw: [SLS-SLP] [SLS-CC] Options for Repeated Transmissions of TC Transfer Frames: Concept Paper Message-ID: <6.2.3.4.2.20080811122619.02e6f5b0@mail.jpl.nasa.gov> All, Please download the ESA concept paper on "Options for Repeated Transmissions of TC Transfer Frames" on the CWE listed below. We will discuss this approach during the SLS-SLP WG meeting on Thur. Oct 16 PM in Berlin. Best regards, Greg Kazz Chairman CCSDS SLS-SLP WG >This is our latest input. > >Ciao > >Gian Paolo >----- Forwarded by Gian Paolo Calzolari/esoc/ESA on 09-08-2008 18:06 ----- >Gian Paolo Calzolari/esoc/ESA > >24-07-2008 09:46 >To >sls-slp at mailman.ccsds.org, Channel Coding Working Groups - SLS-CC >cc >Jean-Luc Gerner/estec/ESA at ESA, Gilles Moury , >Enrico Vassallo/esoc/ESA at ESA, "Aaron Kiely" >Subject >[SLS-SLP] [SLS-CC] Options for Repeated Transmissions of TC Transfer >Frames: Concept Paper > > > >Dear All, > I have just uploaded in CWE the promised concept paper > (TCretransmit6.pdf) for the Options for Repeated Transmissions of > TC Transfer Frames > >The file is available in > The CCSDS Collaborative Work Environment (CWE) > Space Link > Services Area (SLS) > Documents > SLS-SLP > Draft Documents >at URL >http://cwe.ccsds.org/sls/docs/Forms/AllItems.aspx?RootFolder=http%3a%2f%2fcwe.ccsds.org%2fsls%2fdocs%2fSLS-SLP%2fDraft%20Documents&FolderCTID=0x012000439B56FF51847E41B5728F9730D7B55F > >Note that the paper is intended to be the starting point for the >discussion in Berlin. > >Your comments are welcome. > >Ciao > >Gian Paolo Calzolari > >PS This mail is address to also toe Code & Synchronization WG for >possible (minor) impact on the TC Coding Layer. From greg.j.kazz at jpl.nasa.gov Mon Aug 11 21:42:17 2008 From: greg.j.kazz at jpl.nasa.gov (Greg Kazz) Date: Mon, 11 Aug 2008 14:42:17 -0700 Subject: [Sls-slp] Repeating TC's / SLS-SLP Presentation to SLS area Plenary In-Reply-To: References: Message-ID: <6.2.3.4.2.20080811143608.02e41dc0@mail.jpl.nasa.gov> G.P. NASA/JPL does not implement COP-1, however it does implement the FARM. We send our command loads back to back meaning for a given sequence of TC frames 1,2,3,4,5... the sequence of CLTUs is duplicated once and the frame sequence numbers are transmitted as: 1,2,3,4,5...1,2,3,4,5... We view this approach as compliant with the telecommand standard. We view being able to retransmit collections of frames be they "cyclical" i.e., 1,2,3,4,5,1,2,3,4,5 or "hammer": 1122334455 as being an implementation issue within the existing standards. Greg At 01:58 AM 7/18/2008, Gian.Paolo.Calzolari at esa.int wrote: >Takahiro, > thank you for your input. >Do you investigate at CLTU level whether the CLTU you transmit >several times was generated by an AD, BD or BC frame? > >Ed, Greg, > any details on the NASA/JPL implementation of this feature? > > >Ciao > >Gian Paolo >----- Forwarded by Gian Paolo Calzolari/esoc/ESA on 18/07/2008 10:56 ----- >Gian Paolo Calzolari/esoc/ESA > >16/06/2008 18:13 >To >Takahiro Yamada >cc >Edward.Greenberg at jpl.nasa.gov, "Greg J. Kazz" >, Jean-Luc.Gerner at esa.int, >sls-slp at mailman.ccsds.org, sls-slp-bounces at mailman.ccsds.org >Subject >Re: [Sls-slp] SLS-SLP Presentation to SLS area >PlenaryLink > > > > > > >sls-slp-bounces at mailman.ccsds.org wrote on 16/06/2008 17:27:54: > > > Gian Paolo, > > > > > We would really appreciate knowing some details on the NASA/JPL (Ed? > > > Greg?) and JAXA (Takahiro?) implementations of this feature also to > > > understand how much those implementations are within the line of the > > > current standards. > > > > For deep space missions, we send each command frame (actually, it is a > > CLTU) multiple times in order to decrease the probability of > > retransmission. For example, if we are to send command frames #1, #2, > > #3, and #4, we send #1, #1, #2, #2, #3, #3, #4, and #4. This is a case > > in which we send the same command twice and this is what we use for our > > asteroid mission, but we can send the same command any number of times. > >Takahiro, > thank you for your input. >Do you investigate at CLTU level whether the CLTU you transmit >several times was generated by an AD, BD or BC frame? > >Ciao > >Gian Paolo > > > > > > For doing retransmission, we use COP-1 as specified by CCSDS. > > > > I'm not sure if this violates the specification of COP-1 but I will > > check it when I have time. > > > > Best regards, > > Takahiro Yamada. > > > > > > _______________________________________________ > > Sls-slp mailing list > > Sls-slp at mailman.ccsds.org > > http://mailman.ccsds.org/mailman/listinfo/sls-slp >_______________________________________________ >Sls-slp mailing list >Sls-slp at mailman.ccsds.org >http://mailman.ccsds.org/mailman/listinfo/sls-slp