Packet satellite technology reference sources

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Network Working Group                                            V. Cerf
Request for Comments: 829                                          DARPA
                                                           November 1982



             <span class="h1">PACKET SATELLITE TECHNOLOGY REFERENCE SOURCES</span>


                             Vinton G. Cerf
               Defense Advanced Research Projects Agency

ABSTRACT

This paper describes briefly the packet satellite technology developed
by the Defense Advanced Research Projects Agency and several other
participating organizations in the U.K. and Norway and provides a
biblography of relevant papers for researchers interested in
experimental and operational experience with this dynamic
satellite-sharing technique.

INTRODUCTION

Packet Satellite technology was an outgrowth of early work in packet
switching on multiaccess radio channels carried out at the University of
Hawaii with the support of the Defense Advanced Research Projects Agency
(DARPA).  The primary difference between the earlier packet-switched
ARPANET [1, 2] and the ALOHA system developed at the University of
Hawaii [3] was the concept of multiple transmitters dynamically sharing
a common and directly-accessible radio channel.  In the ARPANET, sources
of traffic inserted packets of data into the network through packet
switches called Interface Message Processors (IMPs).  The IMPs used high
speed point-to-point full-duplex telephone circuits [4] on a
store-and-forward basis.  All packet traffic for a given telephone
circuit was queued, if necessary, in the IMP and transmitted as soon as
the packet reached the head of the queue.  On such full duplex circuits
there is exactly one transmitter and one receiver in each direction.

The ALOHA system, on the other hand, assigned a common transmit channel
frequency to ALL radio terminals.  A computer at the University of
Hawaii received packet bursts from the remote terminals which shared the
"multi-access" channel.  Under the control of a small processor, each
terminal would transmit whenever it had traffic, and would await an
acknowledgement, on another frequency, dedicated to the service host. If
no acknowledgement was received, the terminal processor would transmit
again at a randomly chosen time.  The system operated on the assumption
that no store-and-forward or radio relay was needed.  The University of
Hawaii researchers later demonstrated that the ALOHA concept worked on a
satellite channel linking Hawaii and Nasa-Ames via NASA's ATS-1
satellite [5, 6].  A variety of more elaborate satellite channel
assignment strategies were developed and analyzed in the early 1970's
[7-13, 31].


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<span class="grey"><a href="./rfc829">RFC 829</a>                                                    November 1982</span>
                                              Remote User Telnet Service


THE ATLANTIC PACKET SATELLITE EXPERIMENT (SATNET)

In 1973, DARPA began the development of a packet satellite system which
would support the sharing of a common, high speed channel among many
ground stations.  Using an INTELSAT-IV satellite, the Atlantic Packet
Satellite experiment was carried out with the cooperation and support of
the British Post Office, COMSAT Corporation, Linkabit Corporation, and
Bolt Beranek and Newman Corporation, later joined by the Norwegian
Telecommunication Administration and the Norwegian Defense Research
Establishment (NDRE).  Along with University College London and COMSAT
Laboratories, NDRE became one of the major users of the SATNET system.

During 1975-1978, SATNET underwent a broad range of performance
evaluations and tests.  Since 1979, it has served as a stable support
for international experiments and demonstrations of command and control
technology of interest to DARPA, NDRE and the U.K. Royal Signals and
Radar Establishment (RSRE).  Late in 1982, a ground station was added to
connect the German Aeronautics and Space Research Establishment (DFVLR)
into the system.

The early development of SATNET is outlined in [14].  The system design
is documented in [15-22].  Experience with the operation of the SATNET
is reported in [23-24] and experimental results in [25-26].  Potential
services which might be supported by this technology are discussed in
[27].

The integration of the packet satellite technology into a larger,
multiple packet network context is discussed in [28-29].  The system is
expected to continue in use to support joint research by DARPA, RSRE,
NDRE, DFVLR and UCL.  DARPA and the U.S. Defense Communications Agency
are experimenting with a 3 megabit/second domestic packet satellite
system to determine whether packetized voice and data services can be
integrated economically using this technology.  DARPA and the U.S. Naval
Electronic Systems Command recently demonstrated a Mobile Access
Terminal Network (MATNET) which uses packet satellite techniques to
support ship-ship and ship-shore communication over a shared FLTSATCOM
satellite channel [30].

ACKNOWLEDGEMENTS

The development of Packet Satellite technology has involved many
institutions and individuals, but special credit for the successful
realization of the SATNET and its successor systems must be given to Dr.
Robert E. Kahn, Director, Information Processing Techniques Office,
DARPA, for his continuous support and technical contributions throughout
the development and maturation of this technology.





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<span class="grey"><a href="./rfc829">RFC 829</a>                                                    November 1982</span>
                                              Remote User Telnet Service


REFERENCES

<span class="h2"><a class="selflink" id="section-1" href="#section-1">1</a>.  L.G. Roberts and B.D. Wessler, "Computer Network Development to</span>
Achieve Resource Sharing," Spring Joint Computer Conference, AFIPS
Proceedings, Vol. 36, 1970, pp. 543-549.

<span class="h2"><a class="selflink" id="section-2" href="#section-2">2</a>.  R.E. Kahn, "Resource Sharing Computer Networks," Proceedings of the</span>
IEEE, Vol. 60, No. 11, November 1972, pp. 1397-1407.

<span class="h2"><a class="selflink" id="section-3" href="#section-3">3</a>.  N. Abramson, "The Aloha System - Another Alternative for Computer</span>
Communications," AFIPS Conference Proceedings, Vol. 36, 1970, pp.
295-298.

<span class="h2"><a class="selflink" id="section-4" href="#section-4">4</a>.  F.E. Heart, et al, "The Interface Message Processor of the ARPA</span>
Computer Network, Spring Joint Computer Conference, AFIPS Proceedings,
1970, pp. 551-567.

<span class="h2"><a class="selflink" id="section-5" href="#section-5">5</a>.  R. Binder, et al, "Aloha Packet Broadcasting--a retrospect," AFIPS</span>
Conference Proceedings, National Computer Conference, 1975, pp. 203-215.

<span class="h2"><a class="selflink" id="section-6" href="#section-6">6</a>.  N. Abramson and F. Kuo, Editors, Computer Communication Networks,</span>
Prentice Hall, Englewood Cliffs, N.J., 1973.

<span class="h2"><a class="selflink" id="section-7" href="#section-7">7</a>.  L. Kleinrock and S. Lam, "Packet Switching in a Slotted Satellite</span>
Channel," AFIPS Conference Proceedings, NCC, 1973, pp. 703-710.

<span class="h2"><a class="selflink" id="section-8" href="#section-8">8</a>.  L. Kleinrock and F. Tobagi, "Random Access Techniques for Data</span>
Transmission over Packet Switched Radio Channels," AFIPS Conference
Proceedings, NCC, 1975, pp. 187-201.

<span class="h2"><a class="selflink" id="section-9" href="#section-9">9</a>.  L. Kleinrock and S.S. Lam, "Packet Switching in a Multiaccess</span>
Broadcast Channel:  Performance Evaluation," IEEE Transactions on
Communication, Vol. COM-23, 1975, pp. 410-423.

<span class="h2"><a class="selflink" id="section-10" href="#section-10">10</a>.  L.G. Roberts, "Aloha Packet System with and without Slots and</span>
Capture," ACM SIGCOMM, Computer Communication Review, Vol 5, No. 2,
April 1975.

<span class="h2"><a class="selflink" id="section-11" href="#section-11">11</a>.  S.S. Lam and L. Kleinrock, "Packet Switching in a Multi-access</span>
Broadcast Channel:  Dynamic Control Procedures," IEEE Transactions on
Communication, Vol Com-23, September, 1975.

<span class="h2"><a class="selflink" id="section-12" href="#section-12">12</a>.  L.G. Roberts, "Dynamic Allocation of Satellite Capacity through</span>
Packet Reservation," AFIPS Conference Proceedings, NCC, 1973, pp.
711-716.

<span class="h2"><a class="selflink" id="section-13" href="#section-13">13</a>.  N. Abramson, "Packet Switching with Satellites," AFIPS Conference</span>
Proceedings, NCC, 1973, pp. 695-702.



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<span class="grey"><a href="./rfc829">RFC 829</a>                                                    November 1982</span>
                                              Remote User Telnet Service


<span class="h2"><a class="selflink" id="section-14" href="#section-14">14</a>.  R.E. Kahn, "The Introduction of Packet Satellite Communications,"</span>
National Telecommunications Conference, Nov. 1979, p. 45.1.1-45.1.8.

<span class="h2"><a class="selflink" id="section-15" href="#section-15">15</a>.  I.M. Jacobs, et al, "CPODA - A Demand Assignment Protocol for</span>
SATNET," Fifth Data Communications Symposium, Snowbird, Utah, 1977.

<span class="h2"><a class="selflink" id="section-16" href="#section-16">16</a>.  I.M. Jacobs, et.al, "General Purpose Satellite Networks,"</span>
Proceedings IEEE, Vol 66, No. 11, November 1978, pp. 1448-1467.

<span class="h2"><a class="selflink" id="section-17" href="#section-17">17</a>.  I.M. Jacobs, et al, "Packet Satellite Network Design Issues,"</span>
Proceedings, NTC, November 1979.

<span class="h2"><a class="selflink" id="section-18" href="#section-18">18</a>.  L. Palmer, J. Kaiser, S. Rothschild and D. Mills, "SATNET Packet</span>
Data Transmission," COMSAT Technical Review, Volume 12, No. 1, Spring
1982, pp. 181-212.

<span class="h2"><a class="selflink" id="section-19" href="#section-19">19</a>.  Weissler, et al, "Synchronization and Multiple Access Protocol in</span>
the Initial Satellite IMP," COMPCON, September 1978.

<span class="h2"><a class="selflink" id="section-20" href="#section-20">20</a>.  Hsu and Lee, "Channel Scheduling Snychronization for the PODA</span>
Protocol," ICC, June 1978.

<span class="h2"><a class="selflink" id="section-21" href="#section-21">21</a>.  E. Killian and R. Binder, "Control Issues in a PODA Voice/Data</span>
Satellite Network," ICC, June 1980.

<span class="h2"><a class="selflink" id="section-22" href="#section-22">22</a>.  C. Heegaard, J. Heller and A. Viterbi, "A Microprocessor-based PSK</span>
Modem for Packet Transmission over Satellite Channels," IEEE
Transactions on Communications, COM-26, No. 5, May 1978, pp. 552-564.

<span class="h2"><a class="selflink" id="section-23" href="#section-23">23</a>.  P. Cudhea, D. McNeill, D. Mills, "SATNET Operations," AIAA 9th</span>
Communications Satellite Systems Conference, Collection of Technical
Papers, 1982, pp. 100-105.

<span class="h2"><a class="selflink" id="section-24" href="#section-24">24</a>.  D.A. McNeill, et al, "SATNET Monitoring and Control," Proceedings</span>
of the NTC, November 1979.

<span class="h2"><a class="selflink" id="section-25" href="#section-25">25</a>.  P.T. Kirstein, et al, "SATNET Applications Activities," Proceedings</span>
of the NTC, November 1979.

<span class="h2"><a class="selflink" id="section-26" href="#section-26">26</a>.  W.W. Chu, et al, "Experimental Results on the Packet Satellite</span>
Network," Proceedings of the NTC, November 1979.

<span class="h2"><a class="selflink" id="section-27" href="#section-27">27</a>.  E.V. Hoversten and H. L. Van Trees, "International Broadcast Packet</span>
Satellite Services," ICCC Conference Proceedings, Kyoto, Japan,
September 1978.

<span class="h2"><a class="selflink" id="section-28" href="#section-28">28</a>.  V.G. Cerf and R.E. Kahn, "A Protocol for Packet Network</span>
Intercommunication," IEEE Trans. on Comm., Vol. COM-23, May 1974, pp.
637-648.


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<span class="grey"><a href="./rfc829">RFC 829</a>                                                    November 1982</span>
                                              Remote User Telnet Service


<span class="h2"><a class="selflink" id="section-29" href="#section-29">29</a>.  V.G. Cerf and P.T. Kirstein, "Issues in Packet Network</span>
Interconnection," IEEE Proceedings, Vol. 66, No. 11, Nov 1978, pp.
1386-1408.

<span class="h2"><a class="selflink" id="section-30" href="#section-30">30</a>.  L. Evenchik, D. McNeill, R.P. Rice, F. Deckelman, et al, "MATNET,</span>
an Experimental Navy Shipboard Satellite Communications Network, "IEEE
INFOCOM 82 Proceedings, March, 1982.

<span class="h2"><a class="selflink" id="section-31" href="#section-31">31</a>.  M.L. Molle and L. Kleinrock, "Analysis of Concentrated ALOHA</span>
Satellite Links," Sixth Data Communications Symposium, Nov 27-29, 1979,
pp. 87-95.








































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