def obtain_wireless_signal_coverage(self):
"""
According to the position of mobile devices and edge sites, judge whether mobile devices are covered by edge
sites' wireless signal.
:return: lists stored indices of connectable edge sites, power gains, and mobile devices, respectively, and
distances from mobile devices to connectable edge sites
"""
connectable_servers, connectable_distances, connectable_gains = [], [], []
global_distances = [
] # a 'N * M' matrix stored distances between each user and each edge site
for i in range(len(self.__user_info)):
tmp_s, tmp_d, tmp_g = [], [], []
tmp_gains = []
for j in range(len(self.__edge_info)):
distance = ToolFunction.obtain_geo_distance(
self.__user_info[i], self.__edge_info[j])
if distance <= self.__edge_info[j][2]:
# under signal coverage
tmp_s.append(j)
tmp_d.append(distance)
tmp_gains.append(
ToolFunction.obtain_channel_power_gain(
self.__path_loss_const, distance))
tmp_g.append(distance)
connectable_servers.append(tmp_s)
connectable_distances.append(tmp_d)
connectable_gains.append(tmp_gains)
global_distances.append(tmp_g)
connectable_users = []
for j in range(len(self.__edge_info)):
tmp_u = []
for i in range(len(self.__user_info)):
if global_distances[i][j] <= self.__edge_info[j][2]:
tmp_u.append(i)
connectable_users.append(tmp_u)
return connectable_servers, connectable_users, connectable_distances, connectable_gains, global_distances
def obtain_wireless_signal_coverage(user_info, edge_info):
"""
According to the position of mobile devices and edge sites, judge whether mobile devices are covered by edge
sites' wireless signal.
:param user_info: a numpy array stored latitude and longitude of all mobile devices
:param edge_info: a numpy array stored latitude, longitude and signal coverage radius of all edge sites
:return: lists stored indices of connectable edge sites and mobile devices, respectively, and distances from
mobile devices to connectable edge sites
"""
connectable_servers, connectable_distances = [], []
global_distances = [
] # a N*M matrix stored distances between each user and each edge site
for i in range(len(user_info)):
tmp_s = [], tmp_d = [], tmp_g = []
for j in range(len(edge_info)):
distance = ToolFunction.obtain_geo_distance(
user_info[i], edge_info[j])
if distance <= edge_info[j][2]:
# under signal coverage
tmp_s.append(j)
tmp_d.append(distance)
tmp_g.append(distance)
connectable_servers.append(tmp_s)
connectable_distances.append(tmp_d)
global_distances.append(tmp_g)
connectable_users = []
for j in range(len(edge_info)):
tmp_u = []
for i in range(len(user_info)):
if global_distances[i][j] <= edge_info[j][2]:
tmp_u.append(i)
connectable_users.append(tmp_u)
return connectable_servers, connectable_users, connectable_distances, global_distances