GEDOMIS ® - Modular testbed for prototyping agile SDR systems

LAB_SETUP_DIAGRAM
Start: 01 June 2002
End: 31 December 2019
Funding: Internal
Status: Ongoing
Division: Communication Systems, Communication Technologies
Department: Array and Multi-Sensor Processing (A&MSP), Physical-layer Implementation of High Performance Communication Systems (PHYCOM)
Web:  http://technologies.cttc.es/phycom/gedomis/

GEneric DemOnstrator for Modular and agIle SDR Systems (GEDOMIS®) is a highly customizable testbed comprising a number of software defined radio (SDR) platforms, which can be used to develop 5G and beyond wireless communication systems, targeting below 6 GHz applications. In addition, GEDOMIS® includes a real-time multi-channel channel emulator and other test & measurement (T&M) equipment to facilitate the validation and testing of realistic radio communications scenarios, before conducting field trials. The hardware and software building blocks of GEDOMIS® can be configured, customized and programmed according to different prototyping or experimental needs.

Starting from 2009, GEDOMIS® has been used to prototype a number of real-time demonstrators. The most complex development carried out in GEDOMIS®, was a propriety implementation of the DL LTE PHY-layer, which was interfaced with a purpose-built customization of CTTC’s EXTREME® testbed. The latter hosted a suitably modified version of the ns-3 LTE extensions (LENA). The interfacing of the two testbeds and the key modifications applied to LENA were the following: i) the single software process of LENA was divided in three separate processes (i.e., for the eNB, UE and EPC), ii) the abstracted PHY-layer of LENA was substituted with the one developed in GEDOMIS® and iii) the two testbeds were connected through a custom PHY-MAC interface, which guaranteed uninterrupted real-time connectivity between the two layers. This joint end-to-end real-time testbed added over-the-air testing capabilities to LENA and helped to validate different RAN functional splits and KPIs.

For more information please visit GEDOMIS® testbed page.