Infrastructureless IoTasaService for Public Safety and Disaster Response This article proposes a novel costeffective, robust, reliable and flexible infrastructureless IoT multihop Wireless Mesh Network (IoTWMN) for Public Safety and Disaster Response (PSDR). The proposed system is able to autodetect an Emergency Relief State (ERS) due to a disaster and to autoconfigure itself in order to remain up and running, regardless of the disaster nature, to help victims to be timely rescued. To achieve this goal, these networks must be installed quickly and transparently for users, as victims cannot be expected to perform configuration operations or certain multihopenabled software installed on their devices. in case of ERS detection, the system sets up ad hoc connections selforganizing links according to a tandembased WMN topology and selfconfiguring access points (APs) for wireless devices (e.g., mobile phones of disaster victims). Devices connected to ad hoc APs become APs in turn, thus extending the network coverage. Available devices of different stockholders (e.g., municipality, first aid organizations, volunteer groups,...) are federated in a whole cooperating system, where each device works at the same time as node, gateway and router.

RDSP: Rapidly Deployable Wireless Ad Hoc System for PostDisaster Management In postdisaster scenarios, such as after floods, earthquakes, and in war zones, the cellular communication infrastructure may be destroyed or seriously disrupted. In such emergency scenarios, it becomes very important for first aid responders to communicate with other rescue teams in order to provide feedback to both the central office and the disaster survivors. To address this issue, rapidly deployable systems are required to reestablish connectivity and assist users and first responders in the region of incident. In this work, we describe the design, implementation, and evaluation of a rapidly deployable system for first response applications in postdisaster situations, named RDSP. The proposed system helps early rescue responders and victims by sharing their location information to remotely located servers by utilizing a novel routing scheme. This novel routing scheme consists of the Dynamic ID Assignment (DIA) algorithm and the Minimum Maximum Neighbor (MMN) algorithm. The DIA algorithm is used by relay devices to dynamically select their IDs on the basis of all the available IDs of networks. Whereas, the MMN algorithm is used by the client and relay devices to dynamically select their next neighbor relays for the transmission of messages. The RDSP contains three devices; the client device sends the victimxe2x80x99s location information to the server, the relay device relays information between client and server device, the server device receives messages from the client device to alert the rescue team. We deployed and evaluated our system in the outdoor environment of the university campus. The experimental results show that the RDSP system reduces the message delivery delay and improves the message delivery ratio with lower communication overhead.