Александр Чемерис - Открытая реализация gsm
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Alexander ChemerisCEO, fairwaves LLC
GSM re-invented
Open-Source Hardware для базовой станции
Alexander Chemeris twitter: @chemeris e-mail: Alexander.Chemeris@fairwaves.ru
Presentation plan
1. Myth bashing
2. Internet and SDR
3. Open-source GSM
Alexander Chemeris twitter: @chemeris e-mail: Alexander.Chemeris@fairwaves.ru
Software Defined Radio
Приём/передача сигнала —в железе.
Обработка сигнала —в софте.
Alexander Chemeris twitter: @chemeris e-mail: Alexander.Chemeris@fairwaves.ru
UmTRX
A transceiver for• low-cost,• mid-range,• power-efficientGSM base station
and more...
Alexander Chemeris twitter: @chemeris e-mail: Alexander.Chemeris@fairwaves.ru
Open-Source Hardware
• Editable design files are published
• You're allowed to
o distribute,
o modify,
o manufacture.
Alexander Chemeris twitter: @chemeris e-mail: Alexander.Chemeris@fairwaves.ru
Modified UHD firmware & software
1. Works with OpenBTS
2. Works with OpenBSC
3. Even with GnuRadio
Alexander Chemeris twitter: @chemeris e-mail: Alexander.Chemeris@fairwaves.ru
Purpose and users
• Small/tiny carriers
• Developing regions
• Rural and isolated areas
… not to compete with Big Guys
Alexander Chemeris twitter: @chemeris e-mail: Alexander.Chemeris@fairwaves.ru
UmTRX architecture
LNALNA
Transceiver
duplexer
duplexer
1000 Mbitx86 PC
PA
PA
Tx
Rx
Tx
Rx
LNA
LNA
Ch 1
Ch 2
10/100/1000 Mbit
backhaulVoIP
Alexander Chemeris twitter: @chemeris e-mail: Alexander.Chemeris@fairwaves.ru
UmTRX architecture
Alexander Chemeris twitter: @chemeris e-mail: Alexander.Chemeris@fairwaves.ru
UmSEL – selectivity improvement
Alexander Chemeris twitter: @chemeris e-mail: Alexander.Chemeris@fairwaves.ru
UmSEL – selectivity improvement
Alexander Chemeris twitter: @chemeris e-mail: Alexander.Chemeris@fairwaves.ru
LMS6002D
› Single chip transceiver› 375MHz-4GHz.› Programmable
bandwidth: 1.5-28MHz› 12-bit ADC and DAC› Tx RF output +6dBm,
continuous wave
and open-source friendly!
Alexander Chemeris twitter: @chemeris e-mail: Alexander.Chemeris@fairwaves.ru
Open-source software for GSM
OsmoBTS – классическая БС
OpenBTS – БС с подключением по VoIP
OsmocomBB – реализация телефона
Alexander Chemeris twitter: @chemeris e-mail: Alexander.Chemeris@fairwaves.ru
Mayotte project
Площадь374 км2
Население200 тыс человек
ARPU2 $/месяц
Target
low-cost GSM network
affordable communications
uses open-technology
hack & learn
GSM re-inventedАлександр Чемерис
Alexander.Chemeris@fairwaves.ru+7 (915) 330-7626
skype: Alexander.Chemeristwitter: @chemeris
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