2. Presentation plan
1. Myth bashing
2. Internet and SDR
3. Open-source GSM
Alexander Chemeris twitter: @chemeris e-mail: Alexander.Chemeris@fairwaves.ru
3. Software Defined Radio
Приём/передача сигнала —
в железе.
Обработка сигнала —
в софте.
Alexander Chemeris twitter: @chemeris e-mail: Alexander.Chemeris@fairwaves.ru
4. UmTRX
A transceiver for
• low-cost,
• mid-range,
• power-efficient
GSM base station
and more...
Alexander Chemeris twitter: @chemeris e-mail: Alexander.Chemeris@fairwaves.ru
5. 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
6. 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
7. 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
8. UmTRX architecture
Tx PA
Ch 1 duplexer
LNA
Rx
VoIP backhaul
x86 PC Transceiver
10/100/1000 Mbit 1000 Mbit
Rx
Ch 2 LNA
duplexer
Tx PA
Alexander Chemeris twitter: @chemeris e-mail: Alexander.Chemeris@fairwaves.ru
12. 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
13. 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
14. Mayotte project
Target
Площадь
374 км2 low-cost GSM network
Население affordable communication
200 тыс человек
uses open-technology
ARPU
2 $/месяц hack & learn
Alexander Chemeris twitter: @chemeris e-mail: Alexander.Chemeris@fairwaves.ru
