# aligungr/UERANSIM

Open source 5G UE and RAN (gNodeB) implementation.

Repository: https://github.com/aligungr/UERANSIM
Canonical: https://ross.abutalabs.com/products/ueransim
Language: C++
License: AGPL-3.0
License Family: copyleft
Topics: 5g, 5g-ue, 5g-ran, gnb, 5g-nr, 5g-systems
Last push: 2026-07-06T14:30:47+00:00

## Health v2 (maintenance only)
Score: 80/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 91, release rhythm 55, longevity 100
- inputs: {"age_days": 2534, "days_push": 58, "days_rel": 87, "gap_med": 240.0, "n_releases_24m": 3}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1046, forks 399 (observed 2026-08-28T04:03:21.647062+00:00)

## What it is
UERANSIM is an open source 5G UE (user equipment) and RAN (gNodeB) simulator implementing 3GPP R15 specifications. It simulates a 5G mobile phone and base station over UDP, enabling testing of 5G Core Networks and study of the 5G System.

## Use cases
- test a 5G core network without real hardware
- simulate a 5G UE connecting to a core
- emulate a gNodeB base station for lab experiments
- study 5G system protocols like NAS and NGAP
- set up an end-to-end 5G SA testbed
- develop and validate 5G core implementations

## When to choose
- you need an open source 5G SA UE/gNodeB simulator for core network testing
- you want to learn or research 5G system protocols
- you're building or validating a 5G core and need test clients

## When to avoid
- you need real radio/physical layer behavior - the radio interface is only simulated over UDP
- you need a fully complete 3GPP feature set - some features are incomplete
- you need closed-source commercial usage without a commercial license due to AGPL-3.0

## Facets
- artifact type: application
- maturity: active
- function: simulation, networking, testing, developer-tools
- domain: networking, developer-tools, testing
- platform: cpp, cross-platform
- tags: 5g, 5g-sa, gnodeb, ue, ran, nr, 3gpp, core-network-testing, simulator, telecommunications, linux, macos

## Member repositories
- aligungr/UERANSIM (main) score 80

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:03:21.647062+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:01:56.344407+00:00, confidence not recorded.
  - readme: https://github.com/aligungr/UERANSIM (fetched 2026-08-28T04:03:21.647062+00:00, sha 3e58fe79a605)
- Data as of 2026-08-30T08:39:29.467469+00:00.