A Telephone System for the
Next Three Billion
David A. Burgess, CTO
Range Networks, Inc.
                    2
40% OF THE WORLD CANNOT AFFORD BASIC SERVICE
$6 ARPU FLOOR IN A WORLD THAT LIVES ON $3/DAY
                               ...
PSTN public switched te
                                                                                 ;((              ...
HALF OF THE REST IS “CIVIL INFRASTRUCTURE”
WHICH IS MOSTLY ABOUT POWER AT THE BTS SITE
                                   ...
Try Something Different

Get full site well below 100 W and run solar.

Flatten the core network (up to 50% savings).

  B...
New Approach: OpenBTS
Network-side GSM stack with direct SIP/RTP
network interface.

Very portable; based on SDR and gener...
Photos from recent Range Networks install




A WORKING SYSTEM TODAY
FIRST CALL IN 2008, 2G IN PILOT TESTS NOW, GPRS IN 20...
OpenBTS: GPL Cellular

Open source project with active of contributors.

Copyrights assigned to FSF in October 2008;
publi...
BURNING MAN 2008 & 2009
OPEN-AIR TEST RANGE WITH >20K HANDSETS. AND A LOT OF FUN.
                                        ...
OPENBTS CALL PATHS, BLACK ROCK CITY 2009
GSM TO OPENBTS TO ASTERISK TO VOIP CARRIERS TO “THE DEFAULT WORLD”.
             ...
TELECOM NIUE 2010
PILOT NETWORK WITH A TELCO; <<$250K GSM FOR 1,400 PEOPLE, 3,000 VISITORS.
                              ...
NIUE’S LEGACY NETWORK
ANALOG SWITCH, DS1 & IP SATELLITE
                                    13
TWO-WEEK ON-SITE INSTALLATION
HIGH-PROFILE PROJECT; LOCAL SUPPLIES & KNOW-HOW
                                         14
WHY LICENSING CAN BE A GOOD THING.
TECHNICAL CHALLENGE: IUSN’S REGION-2-STYLE 900 MHZ JAMS GSM-900 UPLINK.
               ...
OPENBTS CALL PATHS, NIUE 2010
GSM TO OPENBTS TO ASTERISK TO SKYPE VIA SATELLITE: NIUE TO US/UK FOR NEARLY FREE.
          ...
DIFFERENCES IN CULTURE
FULLY-AUTOMATED PROVISIONING AT BURNING MAN VS. HUMAN CONTACT IN NIUE
                             ...
4 KM TO ALOFI




NIUE SPEECH COVERAGE ESTIMATES
WILL IMPROVE WHEN 900 MHZ INTERFERENCE IS FIXED
                         ...
What Next?
Airliners, ships & oil platforms

Coal mines, industrial sites

Disaster areas, relief camps

“Forward operatin...
Thanks to...
Harvind Samra, Glenn Edens

John Gilmore and our other contributors

Free Software Foundation

Software Freed...
At Range Networks we believe that every individual on
the planet should have access to affordable wireless
communications ...
David Burgess's Presentation at Emerging Communication Conference & Awards 2010 America
David Burgess's Presentation at Emerging Communication Conference & Awards 2010 America
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David Burgess's Presentation at Emerging Communication Conference & Awards 2010 America

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  • Program says Kestrel. Range Networks a new entity that will be used for a lot of commercial operations related to the project.
  • In most of the world, GSM *is* phone service. Optimistic. Just because there&amp;#x2019;s no coverage doesn&amp;#x2019;t mean there are no people. Just because there is coverage doesn&amp;#x2019;t mean most people can afford it.



  • Moving intelligence to the boundaries of the network.

  • We have software; we have hardware. We have a reference design that draws 60W. Come see a demo during the next break.
  • NEPs, carriers, spooks, students, variety

  • GSM user calls through OpenBTS, gets presented to Asterisk as a SIP client, Asterisk runs over Playanet WISP to real-world VoIP services. We also assigned iNum and NANP DIDs directly to GSM handsets.
  • this year, we started working with real phone companies. the Niue problem is one of providing cellular service for just a few hundred subscribers with reasonable CAPEX. They called Tim Panton, Tim called us.


  • That&amp;#x2019;s a Trango 900 MHz IP radio about 5 feet from our GSM antenna, transmitting in the middle of the GSM uplink band. A US-run WISP had installed this stuff all over the island and contend that they need no licenses.
  • Tim Panton dialed into the VUC via OpenBTS and Skype for Asterisk. This was a direct 2G GSM call, not a smart-phone client.

  • Red is indoor speech, green is outdoor &amp; SMS. Based on surveys. Plan for additional sites in central Alofi and at the airport not a problem since sites are cheap.








  • David Burgess's Presentation at Emerging Communication Conference & Awards 2010 America

    1. 1. A Telephone System for the Next Three Billion David A. Burgess, CTO Range Networks, Inc. 2
    2. 2. 40% OF THE WORLD CANNOT AFFORD BASIC SERVICE $6 ARPU FLOOR IN A WORLD THAT LIVES ON $3/DAY 3
    3. 3. PSTN public switched te ;(( !"#$% 7(<'=+-4' &"'$ public data network or IS :>3? 7:( digital network = the wor Problem: GSM NSS - network sub-syste architecture is !"#"$%&'()"*+,+*%-+.#/' next slide 01012''!(3'4$*5+-"*-6$"7'8"-9.$:'%#;'(9+-*5+#<'(=/-"> <7< $%& BSS - base station subsy @-4"$ 7:( 7(</ elements: MS - mobile station, !"#$% +,-'./01%'2/-"'/"'3("#$%&'($"456"7('8/.9 )* #$$".2:3';".(;(.<(0"!")==>?"#$%&'($ talks to the &"'$ BTS ?(( BTS - base transceiv ! "#$%&'()%$)*(*($+%,-%*#$%.'+$%/*'*(,)%/0+*$&%12(*#%*#$%3,44$+5,)6()7%-8)3*(,)+9%'4$: BCD ; ."/:%%.'+$%"4')+3$(<$4%/*'*(,) tower” talks to the BS = >#0+(3'?%@#'))$?%A')'7$&$)* ; ./@:%%.'+$%/*'*(,)%@,)*4,??$4 (3(@A !"# = B,7(3'?%@#'))$?%A')'7$&$)* BSC - base station c = A')'7$&$)*%,-%()*$4-'3$+%2(*#%C//%')6%D// = ."/%&,)(*,4()7 manages a'(& group of ; @.@:%@$??%.4,'63'+*%@$)*$4%1,5*(,)'?9 )"# TRAU - transcoder ra = E$)$4'*(,)F%+*,4'7$%,-%@$??%.4,'63'+*%/#,4*%A$++'7$+ !AD +,-'./01%'2/-"'/"'3("#$%&'($"456"7('8/.9 )* reformats voice and d #$$".2:3';".(;(.<(0"!")==>?"#$%&'($ more or less bandwid HALF OF THE COST IS IN THE BACKING NETWORK - cell broadcast CBC ! "#$%&"'()*+,-.&#/,-.).0&$,1)2.,3 CORE NETWORK AND TRANSMISSION: MSC, BSC, VLR/HLR, T1/E1, MICROWAVE, SS7, ETC. short messages to a 4 56,&"#$&)2&7&/7.7872,&96,3,&.6,&)/,-.).),2&:;&<:8)=,&"'()*+,-.2&73,&2.:3,/&7-/&>=722);),/&)-&8=7>?@& 13,0&7-/&96).,&=)2.2A 4
    4. 4. HALF OF THE REST IS “CIVIL INFRASTRUCTURE” WHICH IS MOSTLY ABOUT POWER AT THE BTS SITE 5
    5. 5. Try Something Different Get full site well below 100 W and run solar. Flatten the core network (up to 50% savings). Beyond SIGTRAN and Abis-over-IP: pure VoIP. Commodity IP switching equipment. Open source and commodity core systems. Peer-to-peer call processing. 6
    6. 6. New Approach: OpenBTS Network-side GSM stack with direct SIP/RTP network interface. Very portable; based on SDR and generic digital radio. No BSCs. No MSCs. Through OpenBTS, 2G handsets appear to VoIP network as SIP endpoints. Through OpenBTS, VoIP network appears to handsets as a normal GSM carrier. 7
    7. 7. Photos from recent Range Networks install A WORKING SYSTEM TODAY FIRST CALL IN 2008, 2G IN PILOT TESTS NOW, GPRS IN 2010, 3G IN 2011. 8
    8. 8. OpenBTS: GPL Cellular Open source project with active of contributors. Copyrights assigned to FSF in October 2008; public releases under GPLv3 via GNU Radio. Private licensing & CLA similar to Asterisk/Digium. >100 developer kits out there (more than Vanu!) June workshop in Bavaria. 9
    9. 9. BURNING MAN 2008 & 2009 OPEN-AIR TEST RANGE WITH >20K HANDSETS. AND A LOT OF FUN. 10
    10. 10. OPENBTS CALL PATHS, BLACK ROCK CITY 2009 GSM TO OPENBTS TO ASTERISK TO VOIP CARRIERS TO “THE DEFAULT WORLD”. 11
    11. 11. TELECOM NIUE 2010 PILOT NETWORK WITH A TELCO; <<$250K GSM FOR 1,400 PEOPLE, 3,000 VISITORS. 12
    12. 12. NIUE’S LEGACY NETWORK ANALOG SWITCH, DS1 & IP SATELLITE 13
    13. 13. TWO-WEEK ON-SITE INSTALLATION HIGH-PROFILE PROJECT; LOCAL SUPPLIES & KNOW-HOW 14
    14. 14. WHY LICENSING CAN BE A GOOD THING. TECHNICAL CHALLENGE: IUSN’S REGION-2-STYLE 900 MHZ JAMS GSM-900 UPLINK. 15
    15. 15. OPENBTS CALL PATHS, NIUE 2010 GSM TO OPENBTS TO ASTERISK TO SKYPE VIA SATELLITE: NIUE TO US/UK FOR NEARLY FREE. 16
    16. 16. DIFFERENCES IN CULTURE FULLY-AUTOMATED PROVISIONING AT BURNING MAN VS. HUMAN CONTACT IN NIUE 17
    17. 17. 4 KM TO ALOFI NIUE SPEECH COVERAGE ESTIMATES WILL IMPROVE WHEN 900 MHZ INTERFERENCE IS FIXED 18
    18. 18. What Next? Airliners, ships & oil platforms Coal mines, industrial sites Disaster areas, relief camps “Forward operating areas” Small telcos all over the world Large-scale rural networks 19
    19. 19. Thanks to... Harvind Samra, Glenn Edens John Gilmore and our other contributors Free Software Foundation Software Freedom Law Center Voxbone, Verizon Taiichi Fox, Tim Panton, Gov’t of Niue Lee Dryburgh 20
    20. 20. At Range Networks we believe that every individual on the planet should have access to affordable wireless communications services. Communications is key to improving quality of life - freedom, health, education, economic well being, social participation and happiness. We provide the world’s lowest cost, sustainable, full featured GSM infrastructure, providing voice, messaging and data services for a wide range of applications and environments. Systems that are easy to install, own and operate. WWW.RANGENETWORKS.COM WWW.OPENBTS.ORG 21
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