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-# colosseum-near-rt-ric
+# Colosseum Near-Real-Time RIC
 
-Initialization scripts are in the directory `repository`:
-- `setup-ric.sh` sets up RIC containers
-- `setup-xapp.sh` sets up xApp containers
+This is a minimal implementation of the O-RAN Software Community near-real-time RIC (Bronze release) adapted and extended to work on the [Colosseum](https://www.colosseum.net/) wireless network emulator.
+The scripts in this repository will start a minimal near-real-time RIC in the form of Docker containers (namely, `db`, `e2mgr`, `e2rtmansim`, `e2term`).
+A sample xApp, which connects to the [SCOPE](https://github.com/wineslab/colosseum-scope) RAN environment through the following [E2 termination](https://github.com/wineslab/colosseum-scope-e2) is also provided.
+
+If you use this software, please reference the following paper:
+
+XXX
+
+This work was partially supported by the U.S. National Science Foundation under Grants CNS-1923789 and NSF CNS-1925601, and the U.S. Office of Naval Research under Grant N00014-20-1-2132.
+
+## Structure
+
+This repository is organized as follows
+
+```
+root 
+|
+└──setup-scripts
+|   |
+|   └──import-base-images.sh
+|   |
+|   └──setup-lib.sh
+|   |
+|   └──setup-ric.sh
+|   |
+|   └──setup-sample-xapp.sh
+|   |
+|   └──start-ric-arena.sh
+|   |
+|   └──start-xapp.sh
+|   
+└──setup
+|  |
+|  └──dbaas
+|  |
+|  └──e2
+|  |
+|  └──sample-xapp
+|  |
+|  └──xapp-bs-connector
+```
+
+### quick start
+
+From the `setup-scripts` directory:
+- Build, configure, and start the near-real-time RIC Docker containers: `./setup-ric.sh`
+- Connect the RAN node through the E2 termination as explained [here](https://github.com/wineslab/colosseum-scope-e2)
+- Get the gNB ID (see section below) and replace it in the `start-xapp.sh` script
+- Configure and start the xApp: `./start-xapp.sh`
+
+### setup-scripts directory
+
+The `setup-scripts` directory contains scripts to initialize the near-real-time RIC on Colosseum.
+- `import-base-images.sh`: script to import the base Docker images needed to build the RIC Docker containers. These images are provided as part of the XXX Colosseum LXC container.
+- `setup-lib.sh`: contains the IP addresses and ports used by the Docker containers of this repository. This script has been adapted from [here](https://gitlab.flux.utah.edu/johnsond/ric-profile/-/blob/master/setup-lib.sh)
+- `setup-ric.sh`: script to build, configure, and start the near-real-time RIC containers of this repository (namely, `db`, `e2mgr`, `e2rtmansim`, `e2term`). This script has been adapted from [here](https://gitlab.flux.utah.edu/johnsond/ric-profile/-/blob/master/setup-ric.sh)
+- `start-ric-arena.sh`: script to start the near-real-time RIC on external testbeds, e.g., on the [Arena platform](https://ece.northeastern.edu/wineslab/arena.php)
+- `setup-sample-xapp.sh`: script to setup a sample xApp Docker container. This xApp is capable of connecting to the [SCOPE](https://github.com/wineslab/colosseum-scope) RAN environment through the following [E2 termination](https://github.com/wineslab/colosseum-scope-e2)
+- `start-xapp.sh`: script to configure and start the sample xApp. The ID of the gNB targeted by the xApp needs to be provided in the script
+
+### setup directory
+
+This directory contains the implementations of the near-real-time RIC Docker container initialized through the scripts in the [`setup-scripts`](setup-scripts) directory.
+- `dbaas`: implementation of a Redis database (`db`) container
+- `e2`: implementation of the E2 termination (`e2term`) container
+- `e2mgr`: implementation of the E2 manager (`e2mgr`) and of the routing manager simulator (`e2rtmansim`) container
+- `sample-xapp`, `xapp-bs-connector`: implementation of the sample xApp provided in this repository and components to connect to the near-real-time RIC and [SCOPE](https://github.com/wineslab/colosseum-scope) RAN environment
+
+### getting the gNB ID
+
+An easy way to derive the gNB ID is the following. From the `setup-scripts` directory:
+- Start the near-real-time RIC Docker containers: `./setup-ric.sh`
+- Read the logs of the `e2term` container: `docker logs e2term -f`
+- Connect the RAN node through the E2 termination as explained [here](https://github.com/wineslab/colosseum-scope-e2)
+- The RAN node should connect to the near-real-time RIC and the gNB ID should appear in the `e2term` logs (see example below)
 
-See container logs with:
-- `docker logs -f container_name`