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NetworkGym is an open-source based network simulation software framework consisting of four modules: Client, Server, Environment, and Simulator. Gym is referenced to OpenAIβs Gym library β an API standard for reinforcement learning (https://gymnasium.farama.org/).
This repository provides source code for all four modules: Client (network_gym_client
), Server (network_gym_server
), Environment (network_gym_env
), and Simulator (network_gym_sim
):
-
network_gym_sim (license: GPLv2): a ns-3.41 (https://www.nsnam.org/) based full-stack multi-access network simulator enhanced with the support of the Generic Multi Access (GMA) protocol (https://github.com/IntelLabs/gma)
-
network_gym_server (license: Apachev2): application software based on ZMQ socket APIs (https://zeromq.org/socket-api/) to support info exchange between network_gym_client and network_gym_sim
-
network_gym_client (license: Apachev2): application software to configure network simulation, collect synthetic data and traces, and run algorithms to generate commands and control the simulation
-
network_gym_env (license: Apachev2): application software to connect network simulator with network_gym_server
- (Optional) Create a new virtual python environment.
python3 -m venv network_venv
source network_venv/bin/activate
- Install Required Libraries.
pip3 install -r requirements.txt
- (For ns-3 Environment Only) Build the
network_gym_sim
-
Install ns-3.41. In the root directory, clone the ns-3.41 and name it as
network_gym_sim
:git clone -b ns-3.41 https://gitlab.com/nsnam/ns-3-dev.git network_gym_sim
After downloading ns-3, install the dependencies and libraries following the ns-3 prerequisites. Build the ns-3 with the following commands. You can find more information on building ns-3 here.
cd network_gym_sim ./ns3 clean ./ns3 configure --build-profile=optimized --disable-examples --disable-tests ./ns3 build
-
Copy gma and networkgym module files:
cp ../network_gym_ns3/scratch/unified-network-slicing.cc scratch/ cp ../network_gym_ns3/network_gym_sim.py . cp -r ../network_gym_ns3/contrib/* contrib/
-
Install the ZeroMQ socket C++ library (required by networkgym module):
apt-get install libczmq-dev
-
In the
network_gym_sim/contrib
folder, clone the 5G nr module from here, using the 5g-lena-v3.0.y branch:cd contrib git clone -b 5g-lena-v3.0.y https://gitlab.com/cttc-lena/nr
-
Add C++ Json library. Replace the
network_gym_sim/contrib/networkgym/model/json.hpp
with the json.hpp:cd networkgym/model/ rm json.hpp wget https://raw.githubusercontent.com/nlohmann/json/develop/single_include/nlohmann/json.hpp
-
Finally, we need to fix a few bugs in the ns-3. The lte module hard coded the IP addresses for the backhaul links. This two files allows we to customize the IP addresses for the backhaul links.
cd ../../../../ cp network_gym_sim/contrib/modified/no-backhaul-epc-helper.cc network_gym_sim/src/lte/helper/no-backhaul-epc-helper.cc cp network_gym_sim/contrib/modified/point-to-point-epc-helper.cc network_gym_sim/src/lte/helper/point-to-point-epc-helper.cc
-
Try to build ns-3 once again to see if there is any errors:
cd network_gym_sim ./ns3 build
-
(Optional) With the previous steps, the code should be running without any issue. However, we also identified a few more issues related to TCP or BBR and proposed fixes in the modified files located in
network_gym_sim/contrib/modified/
folder. You can also replace the original files with them if needed. Again, this is not required.
First, open 3 terminals (or 3 screen sessions), one per component. Make sure all terminals have activated the virtual environment created in the previous step.
In the first terminal type following command to start the server:
python3 start_server.py
The expected output is as following:
Max instances per client:
{'test': 1, 'admin': 100}
ββββββββββ³βββββββββ³βββββββββββββββββββββββββββββββββ³ββββββββββββββ
β Worker β Status β Time since Last Seen (seconds) β Environment β
β‘βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ©
ββββββββββ΄βββββββββ΄βββββββββββββββββββββββββββββββββ΄ββββββββββββββ
In the second terminal type following command to start the ns-3 based environment:
python3 start_env_ns3.py
The expected output from the first (server) terminal should be updated as following:
[b'admin-0-intel-Z390-AORUS-ULTRA', b'', b'{\n "type": "env-hello",\n "env_list": [\n
"nqos_split"\n]\n}']
βββββββββββββββ³βββββββββ³βββββββββββββββββββββββββββββββββ³βββββββββββββββββ
β Worker β Status β Time since Last Seen (seconds) β Environment β
β‘βββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ©
β admin-0-*** β idle β 13.100512027740479 β ['nqos_split'] β
βββββββββββββββ΄βββββββββ΄βββββββββββββββββββββββββββββββββ΄βββββββββββββββββ
In the third terminal, type the following command to start the client:
python3 start_client.py
A progress bar should be displayed at the third (client) terminal:
system_default agent is interacting with NetworkGym's
β ΄ Progress ββΈββββββββββββββββββββββββββββββββββββββ 5% 0:04:41 env time: 4600/101100 ms
NetworkGym Client includes two configuration files, a common configure file and environement dependent configure file.
- Update the common configuration parameters in common_config.json:
{
"connect_via_server_ip_and_server_port": false, //set to ture to use the server_ip and server_port to connect to a Intel cloud server (this method requires Intel VPN);
"server_ip": "gmasim-v01.jf.intel.com", //do not change (for internal users only).
"server_port": 8092, //set to 8088 to access stable version or 8092 to access dev version.
"local_fowarded_port": 8092, // the local port that used to forward to the external server.
"enable_wandb": false, // sending data to wandb database.
"enable_terminal_redering": true, // render the network in the terminal.
"session_name": "admin",//This is for connecting to Intel Cloud server. Make sure to change the "session_name" to your assigned session name. Cannot use '-' in the name! Test account is for testing only (shared by every one). Contact us to apply for an account.
"session_key": "admin",//This is for connecting to Intel Cloud server. Make sure to change the "session_key" to your assigned keys.
}
- Update the environment dependent configuration file, e.g., network_gym_client/envs/nqos_split/config.json.
- View configuration suggestions for arguments at NetworkGym Docs Website.
π¦ NetworkGym
β£ π start_client_demo.py
β π network_gym_client
β£ π adapter.py (β‘οΈ WanDB)
β£ π common_config.json
β£ π env.py
β£ π northbound_interface.py (β‘οΈ network_gym_server and network_gym_env)
β π envs
β π [ENV_NAME]
β£ π adapter.py
β π config.json
- Excuting the π start_client_demo.py file will start a new simulation. To change the environment, modify the
env_name
parameter. The π common_config.json is used in all environments. Depends on the selected environments, the π config.json and π adapter.py in the [ENV_NAME] folder will be loaded. The π adapter.py helps preparing observations, rewards and actions for the selected environment. - The π start_client_demo.py create a NetworkGym environment, which remotely connects to the ns-3 based NetworkGym Simualtor (hosted in vLab machine) using the π northbound_interface. π start_client_demo.py also uses random samples from the action space to interact with the NetworkGym environment. The results are synced to β‘οΈ WanDB database. We provide the following code snippet from the π start_client_demo.py as an example:
#Copyright(C) 2023 Intel Corporation
#SPDX-License-Identifier: Apache-2.0
#File : start_client_demo.py
from network_gym_client import load_config_file
from network_gym_client import Env as NetworkGymEnv
client_id = 0
env_name = "nqos_split"
config_json = load_config_file(env_name)
config_json["rl_config"]["agent"] = "random"
# Create the environment
env = NetworkGymEnv(client_id, config_json) # make a network env using pass client id and configure file arguements.
num_steps = 1000
obs, info = env.reset()
for step in range(num_steps):
action = env.action_space.sample() # agent policy that uses the observation and info
obs, reward, terminated, truncated, info = env.step(action)
# If the environment is end, exit
if terminated:
break
# If the epsiode is up (environment still running), then start another one
if truncated:
obs, info = env.reset()
Please use the following to reference "NetworkGym" in your paper if it is used to generate data for the paper:
Menglei Zhang and Jing Zhu, "NetworkGym: Democratizing Network AI via Simulation-as-a-Service", https://github.com/IntelLabs/networkgym