open telecom -...
TRANSCRIPT
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
Presentation plan
1. Closed NOW
2. Open GSM
3. Open future
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
Mobile spectrum is a licensed resource,
i.e. you need a license to use this spectrum (unlike WiFi).
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
Mobile spectrum is a licensed resource.
Phones are exempt, but operators need a license.
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
Spectrum regulation
The good: Allows high QoS Enforces coverage
The bad: Cost money ($mlns or even $$$blns)
The ugly: Limits competition
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
Open Spectrum
≠Unlicensed
Don't forget about interference!
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
Mobile networks today
Walled gardens
Proprietary
Insecure
… tremendously popular
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
Why insecure?
Few eyeballs
Tested only for a standard conformance
No co-operation among vendors
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
Don't fuzz livemobile networks!
They're too fragile.
© 2010, some 27C3 speaker
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
Mobile networks —next frontier
for open-source
We have to change the mode of operation of mobile networks
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
Presentation plan
1. Closed NOW
2. Open GSM
3. Open future
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
Open-source GSM
OsmocomBB – GSM phone stack
OpenBSC – GSM core network
OpenBTS – GSM base station with VoIP backend
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
GSM Baseband software implementation
http://bb.osmocom.org/
ARM CPU
some DSP
RF
Application processor:runs OS, GUI, apps
Baseband processor (“modem”):talks to a network
RF frontend:generate radio waves
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
OsmocomBB
Features:
Makes calls
Sends SMSs
F/OSS!
Limitations:
Early stage
Requires a PC
Closed hardware
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
OpenBSC –GSM network-in-a-box,implementing the minimalnecessary parts to builda small, self-contained
GSM network.
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
OpenBSCUses existing base stations hardware
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
OpenBSC
Features:
Handles calls, SMS, etc
Stable
F/OSS!
Limitations:
Limited features
Low scalability
Closed hardware
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
OpenBTS –GSM-VoIP network-in-a-box,
uses a software radio to present a GSM air interface to standard 2G GSM handset and
uses a SIP to connect calls.
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
OpenBTSUses software radio
VoIP network
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
UmTRX
A transceiver for• low-cost,• mid-range,• power-efficientGSM base station
and more...
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
Presentation plan
1. Closed NOW
2. Open GSM
3. Open future
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
Open future
Other Osmocom projectshttp://osmocom.org
OpenLTEhttp://sourceforge.net/p/openlte
Wireless Innovation Forum's "Open Source Framework for Commercial Baseband Software" –LTE/Cognitive Radio
… your project here?
GSM re-inventedAlexander Chemeris
[email protected]+7 (915) 330-7626
skype: Alexander.Chemeristwitter: @chemeris
Sergey [email protected]
+7 (903) 130-2310
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
Open-Source Hardware
• Editable design files are published
• You're allowed to
o distribute,
o modify,
o manufacture.
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
Purpose and users
• Small/tiny carriers
• Developing regions
• Rural and isolated areas
… not to compete with Big Guys
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
UmTRX architecture
1GigE
FPGAXilinx Spartan 6 LX75
Power GPSEB230
1 PPS
Rx
Tx
Rx
Tx
controlcontrol
Ref. Clock
TCXO26 MHz
duplexer +LNA+PA
duplexer +LNA+PA
Flash
LMS6002D
LMS6002D
SP
I
UA
RT
switch
switch
GPIO
GPIO
SRAM
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
UmTRX specification
• Dual TRX
• GPS-locked clock
• Euro-cardform-factor
• 3mW output power
• Ethernet connection
15 voice channelscheap Power Amplifiersdiversity receive
no maintenanceno costly OCXO
many enclosures
standard for BTSamplifies to any value
standardreliable
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
LMS6002D
› Single chip transceiver› 375MHz-4GHz.› Programmable
bandwidth: 1.5-28MHz› 12-bit ADC and DAC› Tx RF output +6dBm,
continuous wave
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
Modified UHD firmware & software
1. Works with OpenBTS
2. Works with OpenBSC
3. Even with GnuRadio
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
Mayotte project
Coordinates12 50 S, 45 10 E
Kilometers of coastline185.2 kilometers
Square kilometers of land374 square kilometers
Square kilometers of water0 square kilometers
Population178,437 (July 2003 est.)
Target
low-cost GSM network
affordable communications
uses open-technology
hack & learn
Alexander Chemeris twitter: @chemeris e-mail: [email protected]
About Fairwaves LLC
• Moscow based company, founded in Jan 2011.• Focuses on development of cost-effective mobile access
solutions.• Provides software and hardware development services in
the area of SDR.• Owns world-leading IP in LDPC error-correcting codes, smart
antenna systems and wavelet filtering of RF signals.• Alexander Chemeris, CEO, holds Master degree in Computer
Science and during last 6 years was involved in various projects on VoIP, video-conferencing and wireless technologies as senior engineer, project manager and consultant, including many open-source projects.
• Prof. Dr. Sergey Portnoy, Chairman of the Board, received doctoral degree in 1992 for his achievements in cascaded modulation and coding schemes, nowadays known as OFDM. For the last 20 years he has been building wireless networks and promoting wireless access in Russia. At this moment he holds positions of WiMAX Forum Regional Director, Chairman of the board of ZAO Cedicom (equipment distribution),VP Strategy of ZAO Antares (emerging LTE operator).