def perform_rollout(self, theta, inner=False):
memory = Memory(self.hp)
(s1, s2), _ = self.env.reset()
for t in range(self.hp.len_rollout):
a1, lp1 = self.act(s1, self.theta)
a2, lp2 = self.act_opp(s2, theta)
if self.id > 0:
(s2, s1), (r2, r1), _, _ = self.env.step((a2, a1))
else:
(s1, s2), (r1, r2), _, _ = self.env.step((a1, a2))
r1 = torch.Tensor(r1)
r2 = torch.Tensor(r2)
if inner:
memory.add(lp2, lp1, r2)
else:
memory.add(lp1, lp2, r1)
return memory
def Game(max_ep_len=1000, num_frames=4):
global exit_game
global actions
env = gym.make('CarRacing-v0')
state_dim = env.observation_space.shape
action_dim = env.action_space.shape
print(f"State: {state_dim}")
print(f"Action: {action_dim}")
# set interrupts
env.reset()
env.viewer.window.on_key_press = key_press
env.viewer.window.on_key_release = key_release
# make global actions array
actions = np.zeros(4, dtype=np.float32)
# mem
memory = Memory()
memory.create(state_dim, action_dim)
# logger
ep_ret_log = []
# init environment
obs, ep_ret, ep_len, epoch = env.reset(), 0, 0, 0
obs = np.expand_dims(obs, axis=0)
state_stack = np.repeat(obs, num_frames, axis=0)
print(state_stack.shape)
print(state_stack.dtype)
# main loop
while exit_game == False:
# render window
env.render()
# take action
obs2, r, d, _ = env.step(actions[:3])
obs2 = np.expand_dims(obs2, axis=0)
state_stack = np.append(state_stack[1:], obs2, axis=0)
# statistics
ep_ret += r
ep_len += 1
# Ignore the 'done' signal
d = False if ep_len == max_ep_len else d
# store in memory
memory.add(state_stack, np.array(actions[:3]), r, d)
# End of episode
if d or (ep_len == max_ep_len):
print(f"Epoch: {epoch}, EpRet: {ep_ret}, EpLen: {ep_len}, ReplayBuff: {len(memory)}")
# if exists statistical data
if len(ep_ret_log) > 0:
log = np.array(ep_ret_log)
print("AvgEpRet:", log.mean())
print("StdEpRet:", log.std())
print("MaxEpRet:", log.max())
print("MinEpRet:", log.min())
print()
ep_ret_log.append(ep_ret)
obs, ep_ret, ep_len = env.reset(), 0, 0
obs = np.expand_dims(obs, axis=0)
state_stack = np.repeat(obs, num_frames, axis=0)
epoch += 1
print('\n')
# save the dataset
memory.save()
def marl_test(config):
experiment_name = config.setdefault("experiment_name", "")
time_slots = config.setdefault("time_slots", 10000)
simulations = config.setdefault("simulations", 3)
memory_size = config.setdefault("memory_size", 1200)
pretrain_length = config.setdefault("pretrain_length", 6)
step_size = config.setdefault("step_size", 5)
save_freq = config.setdefault("save_freq", 1000)
save_results = config.setdefault("save_results", True)
save_model = config.setdefault("save_model", False)
load_model = config.setdefault("load_model", False)
load_slot = config.setdefault("load_slot", 4999)
training = config.setdefault("training", False)
episode_interval = config.setdefault("episode_interval", 25)
explore_step = config.setdefault("explore", 2000)
greedy_step = config.setdefault("greedy", 20000)
training_stop = config.setdefault("training_stop", 20000) # Stop the training after these time step.
train_after_episode = config.setdefault("train_after_episode", False) # Train after each episode in stead of training after each time slot.
global_reward_avg = config.setdefault("global_reward_avg", False) # Train after each episode in stead of training after each time slot.
save_positions = config.setdefault("save_positions", False) # Train after each episode in stead of training after each time slot.
enable_channel = config.setdefault("enable_channel", False) # Train after each episode in stead of training after each time slot.
batch_size = config["RLAgent"]["batch_size"]
ia_penalty_enable = config.setdefault("ia_penalty_enable", False)
ia_averaging = config.setdefault("ia_averaging", False)
for simulation in range(simulations):
print("-=-=-=-=-=-=-=-=-=-=-= experiment_name: " + experiment_name + " SIMULATION " + str(simulation + 1) + " =-=-=-=-=-=-=-=-=-=-=-")
# Initialize the env.
env = TestEnv(**config["EnvironmentTest"])
if ia_penalty_enable:
ia_penalty_threshold = config.setdefault("ia_penalty_threshold", 5)
ia_penalty_value = config.setdefault("ia_penalty_value", -10)
ia_penalty_counter = {}
previous_actions = {} # store the previous taken action by the UE.
num_users = env.get_total_users()
for user in range(num_users):
ia_penalty_counter[user] = 0
previous_actions[user] = -1
# Initialize the agen
mainDRQN = DRQN(env, name=experiment_name, total_episodes=time_slots/episode_interval, **config["RLAgent"])
#mainDRQN = DeepRecurrentQNetwork(env=env, name=experiment_name, **config["RLAgent"])
if load_model:
print("Load model DRQN time step " + str(load_slot))
save_dir = "save_model/" + "test/"
mainDRQN.load_model(save_dir, load_slot)
# this is experience replay buffer(deque) from which each batch will be sampled and fed to the neural network for training
memory = Memory(max_size=memory_size)
log_reward_slot = []
log_actions_slot = []
log_ia_slot = []
sum_ia_prev = 0
log_x_positions = []
start_time = time.time()
episode = 0 # Used to update the greediness of the algorithm
# cumulative reward
cum_r = [0]
cum_r_slots = [0]
# cumulative collision
cum_collision = [0]
cum_collision_slots = [0]
# this is our input buffer which will be used for predicting next Q-values
history_input = deque(maxlen=step_size)
# env.network.reset_ia()
# to sample random actions for each user
action = env.sample()
#obs = env.step(action)
obs, rews = env.my_step(action, 0)
rews = list(rews)
state = env.obtain_state(obs, action, rews)
# reward = [i[1] for i in obs[:num_users]]
num_users = env.get_total_users()
num_channels = env.get_action_space()
##############################################
for ii in range(pretrain_length*step_size*5):
action = env.sample()
if enable_channel:
obs, reward = env.my_step_ch(action,
0) # obs is a list of tuple with [(ACK,REW) for each user ,(CHANNEL_RESIDUAL_CAPACITY_VECTOR)]
else:
#obs, reward = env.my_step(
# action, 0) # obs is a list of tuple with [(ACK,REW) for each user ,(CHANNEL_RESIDUAL_CAPACITY_VECTOR)]
obs, reward = env.my_step_design(action, 0)
# obs is a list of tuple with [[(ACK,REW) for each user] ,CHANNEL_RESIDUAL_CAPACITY_VECTOR]
next_state = env.obtain_state(obs, action, rews)
#next_state = env.state_generator(action, obs)
memory.add((state, action, rews, next_state))
state = next_state
history_input.append(state)
##############################################
# TODO: now load the positions
env.load_saved_positions()
for time_step in range(time_slots):
#initializing action vector
action = np.zeros([num_users], dtype=np.int32)
#converting input historskyy into numpy array
# TODO: enable below for lstm
state_vector = np.array(history_input) # LSTM
# state_vector = state # DQN
for each_user in range(num_users):
#action[each_user] = mainDRQN.infer_action(each_user, state_vector=state_vector, time_slot=time_step)
if time_step < explore_step and not load_model: # and 0:
action[each_user] = mainDRQN.infer_action(each_user, state_vector=state_vector, episode=episode,
policy="explore")
elif time_step < greedy_step and not load_model: # and 0:
action[each_user] = mainDRQN.infer_action(each_user, state_vector=state_vector, episode=episode)
else:
action[each_user] = mainDRQN.infer_action(each_user, state_vector=state_vector, episode=episode, policy="greedy")
# taking action as predicted from the q values and receiving the observation from the envionment
# obs = env.step(action) # obs is a list of tuple with [(ACK,REW) for each user ,(CHANNEL_RESIDUAL_CAPACITY_VECTOR)]
if save_positions:
user_pos = env.get_x_pos()
log_x_positions.append(user_pos)
if enable_channel:
obs, reward = env.my_step_ch(action, time_step) # obs is a list of tuple with [(ACK,REW) for each user ,(CHANNEL_RESIDUAL_CAPACITY_VECTOR)]
else:
obs, reward = env.my_step(action, time_step) # obs is a list of tuple with [(ACK,REW) for each user ,(CHANNEL_RESIDUAL_CAPACITY_VECTOR)]
#obs, reward = env.my_step_design(action, time_step)
# TODO: update the env topology after each step.
log_actions_slot.append(action)
ia = env.network.get_information_age(time_step)
ia_sum = calculate_ia_penalty(ia)
log_ia_slot.append(ia)
if ia_averaging: # ia based penalty to the reward
ia_penalty = 0
if ia_sum > sum_ia_prev:
ia_penalty = -1
elif ia_sum < sum_ia_prev:
ia_penalty = 1
sum_ia_prev = ia_sum
# Generate next state from action and observation
# next_state = env.state_generator(action, obs) used for DQN
next_state = env.obtain_state(obs, action, reward, episode, mainDRQN.get_eps())
# print (next_state)
# reward for all users given by environment
#reward = [i[1] for i in obs[:num_users]]
# calculating sum of rewards
sum_r = np.sum(reward)
#calculating cumulative reward
cum_r.append(cum_r[-1] + sum_r)
cum_r_slots.append(cum_r_slots[-1] + sum_r)
#If NUM_CHANNELS = 2 , total possible reward = 2 , therefore collision = (2 - sum_r) or (NUM_CHANNELS - sum_r)
collision = num_channels - sum_r
#calculating cumulative collision
cum_collision.append(cum_collision[-1] + collision)
cum_collision_slots.append(cum_collision_slots[-1] + collision)
#############################
# for co-operative policy we will give reward-sum to each user who have contributed
# to play co-operatively and rest 0
# NOTE: I think, I do not need that part since I already use positive and negative reward.
for i in range(len(reward)): # for each user we have this.
#if reward[i] > 0:
if ia_averaging:
# add penalty based on the direction of the Information age.
reward[i] += ia_penalty
if ia_penalty_enable:
if reward[i] < 1 and action[i] == previous_actions[i]:
ia_penalty_counter[i] += 1
else:
ia_penalty_counter[i] = 0
if ia_penalty_counter[i] > ia_penalty_threshold:
reward[i] = ia_penalty_value
previous_actions[i] = action[i]
if global_reward_avg:
reward[i] = reward[i] + sum_r/len(reward) # Add the average total reward to each UE.
#############################
#reward = reward*2 # Add the average total reward to each UE.
log_reward_slot.append(sum_r)
# print (reward)
# print("EPOCH " + str(time_step))
# add new experiences into the memory buffer as (state, action , reward , next_state) for training
memory.add((state, action, reward, next_state))
state = next_state
#add new experience to generate input-history sequence for next state
history_input.append(state)
# Start training.
if not train_after_episode:
if time_step < training_stop and training: #and not load_model:
mainDRQN.train(memory, time_step)
if time_step%(episode_interval) == episode_interval-1:
print("Time step " + str(time_step) + " epsilon " + str(mainDRQN.get_eps())
+ " cum Collison " + str(cum_collision[episode_interval]) + " sum reward " + str(cum_r[episode_interval]) + " total time " + str(time.time()-start_time) )
cum_r = [0]
cum_collision = [0]
episode += 1
# Updates the velocity of the vehicles if activated
env.update_velocity()
# ia = env.network.get_information_age(time_step)
if train_after_episode and time_step > (batch_size+10) and training:
mainDRQN.train(memory, time_step)
if time_step%save_freq == save_freq-1:
# Save the collisions
if save_results:
print("save results for timestep ", time_step + 1)
save_dir = "save_results/" + "test/"
save_dir = save_dir + experiment_name
if not os.path.isdir(save_dir):
os.makedirs(save_dir)
# filename = save_dir + "/collisions" + "_" + str(time_step) +"_sim"+str(simulation)
# np.save(filename, np.asarray(cum_collision_slots))
filename = save_dir + "/rewards" + "_sim"+str(simulation)
np.save(filename, np.asarray(log_reward_slot))
filename = save_dir + "/actions" + "_sim"+str(simulation)
np.save(filename, np.asarray(log_actions_slot))
# filename = save_dir + "/time_step" + "_" + str(time_step)+"_sim"+str(simulation)
# np.save(filename, np.asarray(str(time.time()-start_time)))
filename = save_dir + "/positions" + "_sim"+str(simulation)
np.save(filename, np.asarray(log_x_positions))
#filename = save_dir + "/ia" + "_sim"+str(simulation)
#np.save(filename, np.asarray(log_ia_slot))
#"_" + str(time_step)+
if save_model:
print("save model for timestep ", time_step + 1)
save_dir = "save_model/" + "test/"
#save_dir = save_dir
mainDRQN.save_model(save_dir, time_step,simulation)