From Aaron.Falk@trw.com Wed Feb 12 13:37:05 1997 Date: 4 Feb 1997 17:11:34 -0800 From: Aaron Falk To: tcp Subject: TIA-SCD-CIS-Internet Protoc Notes from the TIA-SCD-CIS-Internet Protocols Working Group January 30, 1997 NASA Lewis Research Center, Cleveland, OH 8:30am - 5:00pm 20 degrees F. Here are some notes I made regarding the meeting: Short term goals: -Sort through the issues involving maximizing the performance of TCP over satellites, address which types of satellite systems are affected -Collect those aspects that can be solved simply through the IETF-- i.e.solutions which use standards track implementations or those not requiring substantial research -Work with IETF to form a BOF/WG to address these issues -Identify a working plan to address issues requiring more substantial research -Identify technology demonstrations that will address what is becoming known as the ÒLA Times article.Ó I.e. that TCP cannot provide high throughput over satellite. Long Term Goals- -Address research aspects of TCP over satellite -Address other Internet protocols that should be addressed for use over satellite (UDLR, RSVP, multicast, TCP over ATM) ---- To address the short term goals the working group is going to produce several documents: - A table of problem vs. domain. Domains include fixed vs. mobile, GEO vs. LEO, high data rates vs. low data rates, Òfiber-typeÓ error rates vs. typical Ka/C-band error rates, applicability to Gbit terrestrial networks. Problems do not have to have been demonstrated just suspected. This document is meant to capture some of the assumptions in the dialogs weÕve been having about what works and what doesnÕt. Lori Jeromin (MIT Lincoln Labs) has agreed to be the editor of this doc and take the first stab at it. - A list of possible changes to TCP that are satellite friendly and why. This also is meant to be a baseline for future discussion. A list of existing or potential TCP options in one doc could become the begining of a IETF working group charter. ItÕll certainly be useful in demonstrating whether we are ready for a BOF yet. One scenario IÕve discussed with Allyn is that a collection of existing TCP options can be collected into an informational Internet Draft. Even if this doesnÕt solve all the problems this can be useful for vendors who want to support satellite services or folks who need ammunition to get certain options included in an implementation.Eric Travis (MITRE) and Shawn Osterman (OU) have agreed to be the editors of this doc. - A list of implementations of TCP over satellite. This can be a list of pointers to sites with code and/or results so that those interested can keep from reinventing the wheel. The consensus was that this belongs on a web page and Scott Corson (corson@isr.umd.edu) has agreed to create the working group web page. Please send him pointers to any known implementations. Also we might include planned implementations. Benefits of these documents include becoming a basis for creating a IETF BOF/WG, to collect the the various efforts of the working group members in one place, and to develop a strategy for solving research problems. Several WG members have volunteered resources for developers to use. Panamsat has offered DirecPC links (12Mbps) and MCI links (6Mbps) as well as T1 to E1 rates. Also NASA has offered access to the ACTS satellite T1. NASA, Hughes, UMd, and Ohio Univ. have ACTS terminals. The question came up regarding our (TIA-SCD-CIS-Internet Protocols Working Group) interface with the IETF. For the moment there are two aspects to that interface. First, I am in contact with Allyn Romanow a Transport Area Director. We have been discussing the optimal way to draw upon the wider Internet community. This may include a BOF at the Memphis meeting of the IETF, April 7-11. Second, the existance of the tcp-over-satellite LISTSERV has been announced to IETF members who have an interest in wireless communication and many have already subscribed. My hope is that we can conduct much of the business of the working group over email. However, I am planning on calling another working group meeting at the Memphis IETF meeting. It may take a little while to coordinate with facilities but IÕll get the announcement out as soon as possible. It may be that the next working group meeting will be the IETF BOF for TCP over satellite. Whether that BOF gets created is really a function of how well we can create drafts of the documents described above. Thanks for your support. See you on the net... Aaron Attendees: Aaron Falk, TRW Allyn Romanow, IETF/Sun Micro Kent Price, Loral Space & Comm Dan Shell, Cisco Randy Tabor, PanAmSat Chris Schram, PanAmSat Victor Barajas, Hughes Spaceway Brian Kachmar, Analex Corp./NASA LeRC Paul Mallasch, Analex Corp/NASA LeRC Anil Agrawal, COMSAT Labs Daniel Kohn, Teledesic Eric Bobinsky, Terasphere Lori Jeromin, MIT Lincoln Labs Tim Shepard, BBN Eric Travis, MITRE William Kissick, NTIA/ITS (Dept. of Commerce) Raj Jain, Ohio State Univ. Karen Hansen, Ohio Univ. Shawn Osterman, Ohio Univ. Mark Allman, Ohio Univ. Chris Hayes, Ohio Univ. Scott Corson, Univ. of Md Adrian Hooke, NASA/JPL Polly Estabrook, JPL Keith Scott, JPL Pat Gary, NASA GSFC Cindy Tran, NASA LeRC Will Ivancic, NASA LeRC Satellite Networks & Architectures Dan Glover, NASA LeRC Duc Ngo, NASA LeRC Rich Kurak, NASA LeRC Telecom & Networking Thomas Wallett, NASA LeRC/5610 Robert Kerczewski, NASA LeRC/5610 Kul Bhasin, NASA LeRC