A Secure Group Communication Architecture for Autonomous Unmanned Aerial Vehicle

This paper investigates the application of a secure group communication architecture to a swarm of autonomous unmanned aerial vehicles (UAVs). A multicast secure group communication architecture for the low earth orbit (LEO) satellite environment is evaluated to determine if it can be effectively adapted to a swarm of UAVs and provide secure, scalable, and efficient communications. The performance of the proposed security architecture is evaluated with two other commonly used architectures using a discrete event computer simulation developed using MATLAB. Performance is evaluated in terms of the scalability and efficiency of the group key distribution and management scheme when the swarm size, swarm mobility, multicast group join and departure rates are varied. The metrics include the total keys distributed over the simulation period, the average number of times an individual UAV must rekey, the average bandwidth used to rekey the swarm, and the average percentage of battery consumed by a UAV to rekey over the simulation period. The proposed security architecture can successfully be applied to a swarm of autonomous UAVs using current technology. The proposed architecture is more efficient and scalable than the other tested and commonly used architectures. Over all the tested configurations, the proposed architecture distributes 55.2–94.8% fewer keys, rekeys 59.0–94.9% less often per UAV, uses 55.2–87.9% less bandwidth to rekey, and reduces the battery consumption by 16.9–85.4%

A NEW APPROACH OF MULTICAST ROUTING PROTOCOLS IN MANETS BASED ON CBR (CASE-BASED REASONING) METHOD

Multicast routing protocols significantly increase the performance of the network using a new approach of group-orientedservices which become recently apparent for MANETs. Due to this reason several MANET-specific multicasting routingprotocols have been proposed. Although numerous challenges in designing multicast routing protocols in MANETs becomeostensible due to node mobility, contention for channel access, multi hop communications and dynamic topology,researchers tend to address such problems by designing simple, scalable and robust routing protocols. In this paper tried toexplore the existing On-Demand Multicast Routing Protocol (OMRP) with its limitation and propose a new approach ofCBR based multicast routing protocols without changing the basic structure of the protocol. Nodes with CBR based OMRPbecome autonomous by keeping track of previous route discovery experience to reuse back as a solution. This will reducechannel overhead and improves the scalability of the ad hoc network.Keywords: Mobile ad hoc networks (MANETs), Multicast Routing Protocols, and Case-Based Reasoning (CBR)