client>area low[decrease dbm]->drone->area high->satellite->server

Stages of communication:

The "client" initializes a satellite connection.

1. "client" sent request to "area low".

2. "area low" decrees the p_t(in dBm).

3. "area low" send NEW message to the "drone".

4. "drone" send the message to "area high".

5. "area high" decrees the p_t(in dBm).

6. "area high" send the NEW message to the "satellite".

1. "satellite" sent new message to "area high".

2. "area high" decrees the p_t(in dBm).

3. "area high" send NEW message to the "area low".

4. "area low" decrees the p_t(in dBm).

5. "area low" send the message to the "drone".

6. "drone" send the message to the "client".

Message during connection:

1. client sent message to "area low".

2. "area low" decrees the p_t(in dBm).

3. "area low" send the message to the "drone".

4. "drone" Choose whether to drop the package or not.

4.1 "drone" do not drop the package: drone" send the message to "area high".

4.2 "area high" decrees the p_t(in dBm).

4.2 "area high" send the message to the "satellite".