srsran

srsRAN is a free and open-source 4G software radio suite.

Featuring both UE and eNodeB/gNodeB applications, srsRAN can be used with
third-party core network solutions to build complete end-to-end mobile
wireless networks. For more information, see https://www.srsran.com/.

The srsRAN suite currently includes:
- srsUE: a full-stack 4G and 5G NSA / SA UE application
- srsENB: a full-stack 4G eNodeB with 5G NSA / SA gNodeB capabilities
- srsEPC: a light-weight 4G EPC implementation with MME, HSS and S/P-GW

All srsRAN software runs in linux with off-the-shelf compute and radio
hardware.