Table 4: Network simulation parameters.

Parameters Value Sensor nodes 200 Sink nodes 4 Simulation area 7000 (m) × 7000 (m) Channel model Free-space model Frequency band 433 MHZ Power of DATA/ACK 0 dbm Power of RREQ/RREP −3 dbm Data rate 20 Kbps Channel bandwidth 0.2 MHZ Simulation time 1800 s Simulation step 0.0004 s Packet size 48 Bytes Length of ACK packet 8 Bytes Size of node buffer 960 Bytes