Recently, all over the world, natural disaster made many destructions and took many valuable lives. When disaster occurs, it is very difficult to rescue the victims as well survivals. Often after the earthquake and floods, the traditional communication is destroyed due to destruction of communi
Voice based Rapidly Deployable System for Post disaster ad hoc network
Recently, all over the world, natural disaster made many destructions and took many valuable lives. When disaster occurs, it is very difficult to rescue the victims as well survivals. Often after the earthquake and floods, the traditional communication is destroyed due to destruction of communication infrastructure. To overcome this problem, Ad hoc network have been envisioned as an appealing approach to be applied in disaster scenarios. This project proposes Raspberry Pi based Ad hoc system that is easily deployed by the rescue teams in disaster areas. The proposed system sends Voice message and victim’s locations information retrieved using Mic and GPS system to rescue server via wireless relays that are deployed at equal intervals between the victim and the rescue server. The server sends back acknowledgment message to the victim upon reception of victim’s Voice message and finds location of victim using GPS coordinates to mobilize the rescue workers to provide necessary treatment to the victim.
The objective of the project is to design and implement multi-hop wireless ad hoc network that can be easily deployed in disaster situations. When disaster occurs, it becomes very critical to rescue survivals as soon as possible and guarantee the safety of rescuers. Therefore, the aim of the project is to design a system that can rescue the victims in less time and to reduce the mortality rate as low as possible. Additionally, the objective of the project is to cover maximum infected area via Ad hoc communication of wireless relays that is only possible due to proper and efficient working of the intermediate relays as they play a vital role for forwarding the victim request towards the server. To accomplish these objectives, the proposed system will use GPS to acquire coordinates of the victim. The client module will send request to server by sending Voice message and acquired GPS coordinates via multi-hop ad hoc network. The server sends back the acknowledgment to the client module and also informs the rescue team about the location of victim.
The project contains three main modules. The first module, called the client module, is carried by rescue team members and receives voice message and GPS position information and transmits it towards the server. The second module called the relay module is placed at multiple locations between the client and server module to relay request and acknowledgment messages between these two modules. The third module called the server module is installed at some fixed position closer to the disaster area to receive request messages forwarded by relay modules.
The client module initially scans the available relay modules and selects among the list of available relays a single relay module that is closest to the sever by applying a novel algorithm that would be used in this project. When the rescue team member sites any casualties, the client module contains Mic that record a Voice Message. The request message contains a recorded voice and GPS coordinates. The request message would be received by the relay module for further processing.
The relay module continuously listens for the arrival of messages. If it is request message, the message is forwarded towards the server by selecting another relay that is closest to the server by applying a novel algorithm. However, if it is an acknowledgment message, the message is forwarded back to the client module. The relay module dynamically selects a closest relay to the server by applying novel algorithm which tremendously reduces the delivery of request message sent by client module.
The Server module continuously listens for the arrival of messages. If a message is arrived, it immediately sends back an acknowledgment toward the client module and also alerts the rescue team to take necessary actions.

Fig 01: Summarize of the Project
The above figure shows the block diagram of our fyp in which differenet module of the model that is client, relay and server are described briefly. All the module has the main thing is common that is rasberry pi. All the work is done in the raspberry pi using the Linus operating system (OS) that only uses the python language for processing and operation.
The project contains three main modules.
Fig 02: Deployment DiagramThe above figure shows the deployment diagram of this system/model.
| Item Name | Type | No. of Units | Per Unit Cost (in Rs) | Total (in Rs) |
|---|---|---|---|---|
| Smart screen | Equipment | 3 | 2450 | 7350 |
| Raspberry Pi | Equipment | 12 | 3800 | 45600 |
| Speaker | Equipment | 2 | 600 | 1200 |
| Mic | Equipment | 2 | 1200 | 2400 |
| Keyboard | Equipment | 3 | 500 | 1500 |
| Mouse | Equipment | 3 | 500 | 1500 |
| GPS Module | Equipment | 1 | 3000 | 3000 |
| Power Bank | Equipment | 12 | 500 | 6000 |
| Buzzer | Equipment | 1 | 360 | 360 |
| Bread Board | Equipment | 12 | 90 | 1080 |
| Final Prototype Design | Miscellaneous | 1 | 3000 | 3000 |
| Stationary | Miscellaneous | 1 | 1000 | 1000 |
| Thesis Printing | Miscellaneous | 4 | 500 | 2000 |
| Thesis Binding | Miscellaneous | 4 | 1000 | 4000 |
| Total in (Rs) | 79990 |
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