Wi-Fi Based Real Time Communication for Disaster and Emergencies

Abstract

Most of the time communication infrastructure is badly hampered by the natural disaster. Many people are trapped inside their house during disaster time and they cannot communicate with others as there is no network coverage. This paper aims to help those affected people by using Wi-Fi communication. We developed a real-time communication system for Android users where they can send a message and make an audio call through Wi-Fi and also develop an alarming system by which we can detect the appropriate location of the affected people. For audio call, we use UDP (User Datagram Protocol) and for messaging we use TCP/IP. When there is an audio call request it starts a peer to peer communication between the users. TCP/IP is used for messaging because this is a connection-oriented protocol which means there is a guarantee of message arrival. As our system is worked within the Wi-Fi hotspot range, the experiment shows that it can cover up to 32 meters (105 feet).