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GSM-Basestation

GSM-Basestation

Section titled “GSM-Basestation”

Setting Up a GSM Base Station

Section titled “Setting Up a GSM Base Station”

Quickly create a GSM network that can support calls and SMS. Previously covered on this RTL-SDR Post.

Requirements

Section titled “Requirements”

Software

Section titled “Software”

  • [* UHD

  • OpenBTS

Hardware

Section titled “Hardware”

  • Computer or Raspberry Pi running DragonOS](/radio/dragonos)

  • Software Defined Radio (SDR)

Cemaxecuter Guide

Section titled “Cemaxecuter Guide”

Watch on YouTube.

Set Up Base Station Calling

Section titled “Set Up Base Station Calling”

Plug in the SDR.

Section titled “Plug in the SDR.”
  • Connect SDR to the computer.
  • Perform Checks.
lsusb
ifconfig

Configure the network connection for IPv4.

Section titled “Configure the network connection for IPv4.”
  • Create a new interface netmask graphically or via CLI:
Interface#
IPV4
192.168.1.20/24

Confirm the setup using:

Section titled “Confirm the setup using:”
uhd_find_devices
Ensure the device is listed.

Update the configuration:

Section titled “Update the configuration:”
cd /usr/src/osmo-nitb-scripts
sudo nano config.json
sudo main_uhd.py -u --sip
  • -u enables interactive mode.
  • --sip enables Asterisk support.

Run the following in another terminal:

Section titled “Run the following in another terminal:”
/usr/bin/osmo-trx-uhd -C /etc/osmocom/osmo-trx-uhd.cfg

Set Up Base Station OpenBTS

Section titled “Set Up Base Station OpenBTS”

Plug in the SDR.

Section titled “Plug in the SDR.”
  • Confirm the interface name:
lsusb
ifconfig

Configure the network connection for IPv4.

Section titled “Configure the network connection for IPv4.”
  • Create a new interface netmask:
Interface#
IPV4
192.168.1.20/24
Section titled “Navigate to the OpenBTS directory:”
cd /usr/src/OpenBTS/

Register the SIM:

Section titled “Register the SIM:”
sudo /usr/src/OpenBTS/OpenBTS
Connection should be quick.

Details

Section titled “Details”

Compatible Phones

Section titled “Compatible Phones”

For this to work, the mobile device needs to have a Calypso baseband chip.

Motorola:

SonyEricsson:

Compatible SDR

Section titled “Compatible SDR”

See the comparison table.

Requirements:

  • Full-duplex SDR

  • Covers frequency ranges: 850 MHz and 1900 MHz

  • Compatible with the software

YateBTS works with:

Section titled “YateBTS works with:”

srsRan supports:

Section titled “srsRan supports:”