From greg.j.kazz at jpl.nasa.gov Wed Mar 2 14:26:59 2011 From: greg.j.kazz at jpl.nasa.gov (Kazz, Greg J (313B)) Date: Wed, 2 Mar 2011 06:26:59 -0800 Subject: [Sls-slp] FW: Next CCSDS SLS-SLP Telecon on Prox-1 Data Link Layer book review - some RFM comments In-Reply-To: Message-ID: Dear SLS-SLP, Below please consider the following Change Request to the Prox-1 Physical Layer book (as part of the 5-year review cycle) from Enrico Vassallo (RF&MOD WG Chairman) to the policy associated with the SET PL EXTENSION RF&MOD parameters. Your comments are welcome. Best regards, Greg ------ Forwarded Message From: "Enrico.Vassallo at esa.int" Date: Tue, 1 Mar 2011 00:12:25 -0800 To: gkazz Cc: "Gian.Paolo.Calzolari at esa.int" , "marjorie at delandelong.com" Subject: Next CCSDS SLS-SLP Telecon on Prox-1 Data Link Layer book review - some RFM comments Dear Greg, I have some problems with Annex A that contains the format of the message and shows all possiblef options although not all of them are standardized. Gian Paolo and Marjorie mentioned that a solution for the codes was agreed in the past: >>>>>> A.1.8.3 for example reports about two types of RS codes, but it states "Neither of these R-S Codes is specified by CCSDS in other Recommendations and therefore they are not required for cross-support" (actually this text contains some improvements). >>>>>> The same approach should be applied to modulations. The bit selection can be there, but it should be stated if the modulations are really part of the standard. My specific problem is that the current Proximity-1 physical layer specifies only one data format/modulation scheme: 3.2.6.1 The PCM data shall be Bi-Phase-L encoded and modulated directly onto the carrier. Therefore, the following statements in red should be added at the end of sections A1.8.7 and A1.8.8: A1.8.7 Data Modulation Bits 5-6 of the SET PL EXTENSIONS directive shall indicate the type of data modulation used: a) ‘00’ = NRZ; b) ‘01’ = Bi-Phase-Level (Manchester); c) ‘10’ = Reserved; d) ‘11’ = Reserved. Options 00, 10, 11 are not included in the Proximity-1 Physical Layer Standard CCSDS 211.1-B-3 and therefore are not required for cross-support. A1.8.8 Carrier Modulation Bits 3-4 of the SET PL EXTENSIONS directive shall indicate the type of carrier modulation to be used: a) ‘00’ = No Modulation; b) ‘01’ = PSK; c) ‘10’ = FSK; d) ‘11’ = QPSK. Options 00, 10, 11 are not included in the Proximity-1 Physical Layer Standard CCSDS 211.1-B-3 and therefore are not required for cross-support. I hope you can agree with this change request. Best Regards, Enrico > > > All, > > I have put the update (based upon the discussion at the previous SLP > telecon held on Feb 15, 2011) onto the CWE at > > http://cwe.ccsds.org/sls/docs/Forms/AllItems.aspx?RootFolder=%2fsls% > 2fdocs%2fSLS-SLP%2fMeeting%20Materials%2f2011% > 2fSpring&FolderCTID=&View={16ACDA38-FFA3-4657-8F27-B166C23C24A2} > > Note that this version still contains some open assigned actions taken > during last weeks telecon to be filled in shortly. > The review will continue with those action items first and then > proceed to the beginning of Chap. 5 where we left off. > > Best regards, > > Greg Kazz > Chairman CCSDS SLS-SLP WG > > On 2/16/11 8:48 AM, "gkazz" wrote: > > Dear SLS-SLP, > > The next SLP Telecon to review the Prox-1 Data Link Layer book is > planned for Feb. 28 at 8 – 10 AM Pacific (5 PM – 7 PM European Time) > The Teleconf. Meet me number is the same as last time: 818 393-1870 > No pass code is necessary to access it. > > I will redistribute the Prox-1 data link layer draft book based upon > the results of our last telecon (held 15 Feb. ) and including the > results of the action items before the meeting. > > Thanks for your participation! > > Greg Kazz > Chairman SLS-SLP WG > _______________________________________________ > Sls-slp mailing list > Sls-slp at mailman.ccsds.org > http://mailman.ccsds.org/mailman/listinfo/sls-slp > ------ End of Forwarded Message -------------- next part -------------- An HTML attachment was scrubbed... URL: From Gian.Paolo.Calzolari at esa.int Fri Mar 4 15:30:40 2011 From: Gian.Paolo.Calzolari at esa.int (Gian.Paolo.Calzolari at esa.int) Date: Fri, 4 Mar 2011 16:30:40 +0100 Subject: [Sls-slp] FW: Next CCSDS SLS-SLP Telecon on Prox-1 Data Link Layer book review - some RFM comments In-Reply-To: References: Message-ID: > > Kazz, Greg J (313B) > > Dear SLS-SLP, > > Below please consider the following Change Request to the Prox-1 > Physical Layer book (as part of the 5-year review cycle) from Enrico > Vassallo (RF&MOD WG Chairman) to the policy associated with the SET > PL EXTENSION RF&MOD parameters. > > Your comments are welcome. > Greg, I do recommend keeping consistent presentation and whenever a given option is not really part of the standard, this shall be highlighted. Regards Gian Paolo -------------- next part -------------- An HTML attachment was scrubbed... URL: From greg.j.kazz at jpl.nasa.gov Mon Mar 7 19:12:04 2011 From: greg.j.kazz at jpl.nasa.gov (Kazz, Greg J (313B)) Date: Mon, 7 Mar 2011 11:12:04 -0800 Subject: [Sls-slp] Prox-1 Data Link Layer review - two specification issues Message-ID: Dear SLS-SLP, We need to consider the following feedback I have received from the NASA Electra implementers with respect to the current Prox-1 Data Link Layer specification before it is released again. Please read the following text and let me know how you feel about these two issues below. I plan to discuss them in an upcoming telecon before the SLP meeting in Berlin. Best regards, Greg Kazz Chairman SLS-SLP WG 1. Carrier_Only_Duration, Acquisition_Idle_Duration, Tail_Idle_duration values – potentially different MIB values for hailing vs comm change NASA figured there may be theoretical cases where you would not want to force them to be the same. For instance, you might want longer times for hailing to assure lock, but smaller times for comm change (where you may be able to leverage pre-existing lock) to reduce the amount of non-data-transfer “down time” added by comm changes in adaptive data rate operations. Our default values only differ in Carrier_Only_Duration, which is 1.0 sec for hailing and zero for comm change. 2. What’s the motivating case for the newly proposed S80: Reconnect State in Prox-1 ? This is where the carrier_loss_timer expires on the orbiter (Hailer), and makes the orbiter drop it’s carrier long enough, so that the lander is forced to drop carrier lock as well. Matt claims the protocol will simply let him flywheel through such a short term glitch. He is really asking do we really need this reconnect feature? NASA has observed in the lab the following scenario (not yet in flight, though that’s probably because the MRO Electra tends to hold on to carrier too hard rather than lose carrier too easily): 1. Hailing occurs at hailing settings (frequency, data rate, etc). 2. Hailing succeeds and session commences at active settings (different from hailing settings). 3. Orbiter loses carrier and starts rehailing (which the Electras do at the original hail settings; since rehailing is currently outside the Prox-1 spec, this was just our design decision), but the lander does not lose carrier (ie. for a time exceeding the lander’s Carrier_Loss_Timeout) and so the lander is still listening at the active settings. It is easy for the lander to retain carrier lock even if the orbiter is at a different data rate or coding. 4. Communication may never be re-established (automatically). Similar behavior can also occur if the lander hears the hail and goes to the active settings, but the orbiter does not hear the lander response. Unless the the lander’s Carrier_Loss_Timeout is less than the orbiter’s Hail_Wait_Duration , this can happen in the existing Prox-1 spec, and there is no obvious reason why the Hail_Wait_Duration should be linked to the Carrier_Loss_Timeout in this way. And nominal Carrier_Loss_Timeout might be large to flywheel over short outages. So in Electra we added a Rehail_Gap_Duration to be linked to the Carrier_Loss_Timeout, rather than adding constraints to the Hail_Wait_Duration. There is an argument to add this constraint to the Hail_Wait_Duration, just depends on preference for adding new entities versus loading existing entities with multiple purposes. In Electra we generally try to go for the more flexible way, which we usually think is adding more settings. That does not mean that’s the only way. -------------- next part -------------- An HTML attachment was scrubbed... URL: From greg.j.kazz at jpl.nasa.gov Mon Mar 7 23:13:33 2011 From: greg.j.kazz at jpl.nasa.gov (Kazz, Greg J (313B)) Date: Mon, 7 Mar 2011 15:13:33 -0800 Subject: [Sls-slp] Update made to CCSDS 130.2-G Space Data Link Protocols GB Message-ID: Dear SLP, Marjorie de Lande Long has a new draft update to CCSDS 130.2-G Space Data Link Protocols GB as discussed at the fall meeting in London. Please take a look at it and let the WG know if you have any comments or concerns. We will discuss this issue at the Spring meeting in Berlin. Please see the following URL for the update on the SLP CWE: http://tiny.cc/a4cxo Best regards, Greg -------------- next part -------------- An HTML attachment was scrubbed... URL: From greg.j.kazz at jpl.nasa.gov Mon Mar 7 23:16:14 2011 From: greg.j.kazz at jpl.nasa.gov (Kazz, Greg J (313B)) Date: Mon, 7 Mar 2011 15:16:14 -0800 Subject: [Sls-slp] Re: Update made to CCSDS 130.2-G Space Data Link Protocols GB In-Reply-To: Message-ID: RESENT with one more thing to add: This item is in regard to the new Retransmission parameters in TC Space Data Link Protocol On 3/7/11 3:13 PM, "gkazz" wrote: Dear SLP, Marjorie de Lande Long has a new draft update to CCSDS 130.2-G Space Data Link Protocols GB as discussed at the fall meeting in London. Please take a look at it and let the WG know if you have any comments or concerns. We will discuss this issue at the Spring meeting in Berlin. Please see the following URL for the update on the SLP CWE: http://tiny.cc/a4cxo Best regards, Greg -------------- next part -------------- An HTML attachment was scrubbed... URL: From greg.j.kazz at jpl.nasa.gov Tue Mar 8 17:31:27 2011 From: greg.j.kazz at jpl.nasa.gov (Kazz, Greg J (313B)) Date: Tue, 8 Mar 2011 09:31:27 -0800 Subject: [Sls-slp] Next SLP Telecon on Prox-1 Data Link Review Message-ID: Dear SLP, The next telecon reviewing the CCSDS Prox-1 Data Link Layer Blue Book (part of the 5 year review) Is planned for: Tue. March 22 from 8AM to 10 AM Pacific If my calculation is correct, due to the time change in the USA on March 13, it should be 3PM British Time and 4PM European Time then. Meet me conference number is: +1 818 393 1870 Best regards, Greg Kazz Chairman CCSDS SLS-SLP WG -------------- next part -------------- An HTML attachment was scrubbed... URL: From greg.j.kazz at jpl.nasa.gov Tue Mar 15 23:23:26 2011 From: greg.j.kazz at jpl.nasa.gov (Kazz, Greg J (313B)) Date: Tue, 15 Mar 2011 16:23:26 -0700 Subject: [Sls-slp] Prox-1 PICS Proforma Message-ID: Gian-Paolo, Based upon the recommendation of the CCSDS Mars Mission Protocol Profiles--Purpose and Rationale. Green Book. Issue 1. July 2008. CCSDS 740.0-G-1, namely in Section 4.2 that “All relevant protocol specifications should include a Protocol Implementation Conformance Statement (PICS) proforma. Having benefited from the initial work that Dai Stanton did on these profiles, I have completed a draft PICS for each of the 3 Proximity-1 Blue books. Needless to say, the PICS for the entire Prox-1 protocol suite (Physical, Coding&Sync sublayer, Data Link) have been lacking and missions have been desiring this information. Therefore I think it appropriate that the PICs be reviewed within the context of the current on-going 5-year review for each of these documents. I also recommend that the PICs once reviewed and approved by the corresponding WGs and joint WGs become a normative Annex in each of the layered specifications. Being the SLS-SLP WG chairman, I will place the proposed PICs for the Data Link Layer in the CWE and request that the other chairman do the same for the other PICs. Best regards, Greg -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: PICS_Prox1_Physical_Layer_Mar15_2011.docx Type: application/msword Size: 139152 bytes Desc: PICS_Prox1_Physical_Layer_Mar15_2011.docx URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: PICS_Prox1_Data_Layer_Mar7_2011.docx Type: application/msword Size: 182326 bytes Desc: PICS_Prox1_Data_Layer_Mar7_2011.docx URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: PICS_Prox1_C&S_Layer_Feb17_2011.docx Type: application/msword Size: 135115 bytes Desc: PICS_Prox1_C&S_Layer_Feb17_2011.docx URL: From greg.j.kazz at jpl.nasa.gov Tue Mar 15 23:28:59 2011 From: greg.j.kazz at jpl.nasa.gov (Kazz, Greg J (313B)) Date: Tue, 15 Mar 2011 16:28:59 -0700 Subject: [Sls-slp] Proposed Proximity-1 Data Link Layer PICs Proforma Message-ID: Dear SLP, Under the following URL, please find the draft PICs Proforma for the Prox-1 Data Link Layer. http://tinyurl.com/4tmwwot To be considered for the 5-year review of the Proximity-1 protocol. Best regards, Greg Kazz Chairman SLS-SLP WG -------------- next part -------------- An HTML attachment was scrubbed... URL: From greg.j.kazz at jpl.nasa.gov Mon Mar 21 22:38:19 2011 From: greg.j.kazz at jpl.nasa.gov (Kazz, Greg J (313B)) Date: Mon, 21 Mar 2011 15:38:19 -0700 Subject: [Sls-slp] Reminder - SLP Telecon Tomorrow March 22 2011 Message-ID: Dear SLP, Just a reminder that tomorrow at 8 AM Pacific Time (4 PM European Time) there is a telecon planned for approx 2 hours on the continuing review of the Prox-1 Data Link Layer Protocol The current version of the review document is in the CWE with date: March 7 in the filename i.e., CCSDS_211.0-B-4_March7_2011_GJK We stopped in Chapter 6 which will be are starting point again. http://tinyurl.com/4tmwwot Meet me number again is: +1 818 393-1870 Best regards, Greg -------------- next part -------------- An HTML attachment was scrubbed... URL: From greg.j.kazz at jpl.nasa.gov Tue Mar 22 16:52:32 2011 From: greg.j.kazz at jpl.nasa.gov (Kazz, Greg J (313B)) Date: Tue, 22 Mar 2011 09:52:32 -0700 Subject: [Sls-slp] FW: [Cesg-all] Fall 2011 CCSDS Technical Plenary meeting location In-Reply-To: <6D12692A7874434DAC51C93B019D4349EF9F2F4B1B@ALTPHYEMBEVSP20.RES.AD.JPL> Message-ID: All, Here are some details as to when and where the Fall 2011 CCSDS meetings will be held. Best regards, Greg Kazz ------ Forwarded Message From: "Hooke, Adrian J (9000)" Date: Tue, 22 Mar 2011 06:26:53 -0700 To: "cesg-all at mailman.ccsds.org" Subject: [Cesg-all] Fall 2011 CCSDS Technical Plenary meeting location You will notice that the Meetings tab of the CCSDS website has been updated: http://public.ccsds.org/meetings/DispForm.aspx?ID=103 Hosted by NASA, the Fall 2011 CCSDS meeting will be held during the week of 31 October – 04 November at the University of Colorado in Boulder, Colorado, USA. (The CESG will meet on Saturday, 05 November.) The meeting rooms will for the most part be located in the conference facility at the University Memorial Center: http://www.colorado.edu/campusmap/map.html?bldg=UMC The Secretariat will shortly be in contact with further details, such as how to request Letters Of Invitation. Best regards Adrian ------ End of Forwarded Message -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: ATT00001.txt Type: video/x-fl Size: 152 bytes Desc: ATT00001.txt URL: From greg.j.kazz at jpl.nasa.gov Thu Mar 24 18:36:22 2011 From: greg.j.kazz at jpl.nasa.gov (Kazz, Greg J (313B)) Date: Thu, 24 Mar 2011 11:36:22 -0700 Subject: [Sls-slp] FW: Confirmation of appointment with (JPL Conference) on 4/7/2011 08:00 AM In-Reply-To: <20110324_174036_090361.noreply@turboschedule.com> Message-ID: Dear SLP WG, Our next telecom will be THURSDAY April 7 starting at 8 AM PST (5 PM European Summer Time) on the continuing review of the Prox-1 Data Link Layer Blue book will be as per below. Please note the DIFFERENT Phone number below for the telecon. Our latest WG version resides on the CWE under the URL: http://tinyurl.com/4tmwwot The file names to look for have March 23 embedded in the filenames. You should now be able to view the Full Duplex Diagram (6.4.2) in the document itself (I converted to Office 2011 for the MAC). If you are still having trouble viewing it – I attached the PDF file with the March 23 date in the filename as well. As always your comments are welcome. Best regards, Greg Kazz Chairman CCSDS SLS-SLP WG ------ Forwarded Message From: JPL Conference Date: Thu, 24 Mar 2011 10:40:36 -0700 To: gkazz Subject: Confirmation of appointment with (JPL Conference) on 4/7/2011 08:00 AM Appointment with JPL Conference(DayCal) on April 7, 2011 at 08:00 AM to 10 AM Pacific Daylight Savings Time Business Name : JPL Confrence Line Confirmation Number: 50-15359-2023972 Your Contact Details +1 818-354-9873 ------ End of Forwarded Message -------------- next part -------------- An HTML attachment was scrubbed... URL: -------------- next part -------------- A non-text attachment was scrubbed... Name: ATT00001.htm Type: video/x-fl Size: 578 bytes Desc: ATT00001.htm URL: