According to the Firefighter scenario (see Figure 1), wireless sensor nodes are deployed in the building

rooms by mobile firefighter (fm). Command post is placed at the floor entrance. It is the gateway (gw)

to the fire station outside or connected via internet, etc. Firefighter carrying a collection of sensor

nodes, moves and visits every room on the way, places there and turns on one sensor node, then this

node initiates the transmission of messages. Messages are sent periodically from every static sensor

node both to the gateway and to the firefighter (fm). Also messages are sent from firefighter node to the

gateway. Firefighter movement path is shown as arrow directed downwards and to the left.