# Satellite-Assisted Disrupted Communications: IoT Case Study
## 2 Related Work  
The evaluation of space infrastructure has gained increasing attention, due to the significant role of satellites, Unmanned Aerial Vehicles (UAVs), drones, and ad hoc networks in facilitating the communication among IoT devices within the Edge-Cloud environment. In Table 1 a summary of the related literature works has been provided, focusing on the research areas of: (i) smart cities, (ii) IoT relays, (iii) space communication, and (iv) Delay-Tolerant Networking (DTN). Existing literature works have leveraged OMNeT++ across diverse network domains, including 4G, 5G, Mobile Ad hoc Networks (MANETs), Vehicular Ad hoc Networks (VANETs), ad hoc Wireless Sensor Networks (WSNs), Peer-To-Peer networks (P2P), etc. These works have implemented network protocols and standards primarily by utilizing the INET framework [10]. INET evolved from the IPSuite originally developed at the University of Karlsruhe, providing detailed protocols such as the Transmission Control Protocol (TCP), Internet Protocol versions 4 and 6 (IPv4 and IPv6), Ethernet, Ieee802.11, and Open Shortest Path First (OSPF). INET also serves as a starting point for the implementation of novel networking paradigms such as Software-Defined Networking (SDN), Named Data Networking (NDN) and Information-Centric Networking (ICN). In the context of smart city scenarios, several studies have utilized OMNeT++. An approach for rapid VANETs was presented in [11], incorporating OMNeT++ with the Vehicles In Network Simulation (VEINS) and Simulation of Urban Mobility (SUMO) frameworks to simulate traffic scenarios using maps imported from OpenStreetMap (OSM). In [12],the implementation of VANET broadcasting algorithms and the potential issues of actual devices were addressed, using OMNeT++, SUMO, and Google Earth. A version of the INET framework for Vehicle-To-Everything (V2X) communications was considered in [13], aiming at a substantial reduction in the computational time in city-scale scenarios. In [14], the focus shifted to enhancing the performance of the Ad hoc On-demand Distance Vector (AODV) and Optimized Link State Routing (OLSR) protocols in high-density urban areas, by proposing a vehicle-node density parameter. Authors in [15] discussed strategies to improve the road safety and traffic management through a Variable Speed Limit (VSL) implementation via VANETs and overcome the challenges associated with traditional systems, using OMNeT++, SUMO, and VEINS. Furthermore, in [16; 17], specific enhancements in the packet delivery of routing protocols were investigated, focusing on AODV and MANET devices respectively. Regarding OMNeT++ implementations for relays, various works showcased the utilization of this framework. The authors in [18] introduced the BEEDRONES framework for the data collection in UAV-aided WSNs, aiming to enhance the WSN lifetime and optimize the data quality by minimizing spatial correlation. In [19], a lightweight distributed detection scheme was introduced to defend against flooding attacks in the \"Internet of Drones\" environment. In [20] a spatial querying scheme aided by the sky caching concept was presented, involving a flying drone. Regarding the implementation of ships as relays, a particular example of the Synthetic Aperture Radar with error control was implemented in [21], displaying encouraging outcomes with respect to the Bit and Packet Error Rate, window size, and system efficiency. Additionally, the work by [22] proposed a simulation framework concerning the energy consumption and communication protocols in Maritime Surveillance Sensor Networks to facilitate information acquisition. Finally, in [23] the evaluation of a relay-aided device-to-device alternative method was described, to support short-distance direct communications in scenarios with suboptimal channel links and limited coverage. Furthermore, several noteworthy space-related endeavors that utilize OMNeT++ have been undertaken.