We propose a multi-objective optimization algorithm to allocate tasks and plan paths for team of UAVs. The UAVs must find target in bounded area then continuously communicate the information ground personnel. Our genetic approach aims minimize mission completion time, which includes time (area coverage) setup communication path (network connectivity). evaluate strategies using data mule, relay chain, novel hybrid with can be tuned prioritize coverage or connectivity, depending on demands....

A minimum energy routing protocol reduces the consumption of nodes in a wireless ad hoc network by packets on routes that consume amount to get their destination. This paper identifies necessary features an on-demand and suggests mechanisms for implementation. We highlight importance efficient caching techniques store route information propose use 'energy aware' link cache storing this information. compare performance terms savings with existing via simulation. discuss implementation Dynamic...

This paper explores the role of meshed airborne communication networks in operational performance small unmanned aircraft systems. Small systems have potential to create new applications and markets civil domains, enable many disruptive technologies, put considerable stress on air traffic control We argue that existing networked architectures, only ad hoc networking can meet demands for large number expected be deployed future. Experimental results using heterogeneous system are presented...

This paper considers the problem of an attacker disrupting encrypted victim wireless ad hoc network through jamming. Jamming is broken down into layers and this focuses on jamming at Transport/Network layer. layer exploits AODV TCP protocols shown to be very effective in simulated real networks when it can sense packet types, but encryption assumed mask entire header contents so that only size, timing, sequence available for sensing. A sensor developed tested live data. The classification...

Abstract We incorporate communication into the multi-UAV path planning problem for search and rescue missions to enable dynamic task allocation via information dissemination. Communication is not treated as a constraint but mission goal. While achieving this goal, our aim avoid compromising area coverage goal overall time. define tasks as: search, inform, monitor at best possible link quality. Building on centralized simultaneous inform connect (SIC) strategy, we propose two adaptive...

This paper considers two-dimensional interference-limited cellular radio systems. It introduces the shotgun system that places base stations randomly and assigns channels randomly. Such systems are shown to provide lower bounds performance easy compute, independent of shadow fading, apply a number design scenarios. Traditional hexagonal an upper bound. The difference between is small under operating conditions typical in modern TDMA CDMA Furthermore, strong fading limit, converge. To give...

*† ‡ § , This paper describes an implementation of a wireless mobile ad hoc network with radio nodes mounted at fixed sites, on ground vehicles, and in small (10kg) UAVs. The networking allows any two to communicate either directly or through arbitrary number other which act as relays. We envision sce narios for this type network. In the first, UAV acts prominent node that connects disconnected radios. second, enables groups UAVs each extend UAVs' operational scope range. consists mesh...

In this paper, we analyze the signal-to-interference-plus-noise ratio (SINR) performance at a mobile station (MS) in random cellular network. The network is formed by base stations (BSs) placed one-, two-, or three-dimensional space according to possibly non-homogeneous Poisson point process, which generalization of so-called shotgun system. We develop sequence equivalence relations for SCSs and use them derive semi-analytical expressions coverage probability MS when transmissions from each...

Using a combination of empirical data and theoretical models, this paper develops model user behavior for personal communications system environment. This is used to analyze mobility management strategy that combines automatic updates by the users-either when they make significant moves or go extended periods without network interaction; multiple hysteresis in form dynamic registration areas delayed updates; focused paging minimizes number pages given constraint on time allowed page. Over...

The author argues that a strong impetus for using neural networks is they provide framework designing massively parallel machines. He notes the highly interconnected architecture of switching suggests similarities to networks. presents two applications in which can solve problems efficiently. shows computational advantage be gained by nonuniform time delays network.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

Recent FCC proceedings have considered the notion of unlicensed device operation in licensed bands. Licensed users are concerned about harmful interference while manufacturers that is an imprecise design concept. This paper addresses three elements to this debate. First, it advocates for explicit model be included rules. Such a provides bounded protection user providing assurances and performance goals manufacturers. Second, assesses several proposed methods devices avoid develops variants...

We solve the adaptive call admission control (CAC) problem in multimedia networks via reinforcement learning (RL). The requires that network revenue be maximized while simultaneously meeting quality of service (QoS) constraints forbid entry into certain states and use actions. show RL provides a solution to this constrained semi-Markov decision is able earn significantly higher revenues than alternative heuristics. Unlike other model-based algorithms, does not require explicit state...

In this paper we demonstrate a wireless 802.11 testbed. This testbed allows for direct comparison between mobile routing protocols without affecting their or MAC layer inter-layer interaction. We have built low cost environment to facilitate such network research. The core idea is "compressing" the and emulating mobility actually moving nodes. successfully emulate RF effects along with mobility. viability of test bed checked help click implementation dynamic source protocol. Our experiences...

Think-alouds are a common HCI usability method where participants verbalize their thoughts while using interfaces. However, utility in cross-cultural settings, particularly the Global South, is unclear, cultural differences impact user interactions. This paper investigates challenges teachers rural C\^ote d'Ivoire faced when chatbot designed to support an educational program. We conducted think-aloud sessions with 20 two weeks after deployment, analyzing navigation, errors, and time spent on...

The algorithm for choosing nonblocking sets of data cells from the queues can significantly affect throughput and queuing behavior. authors present an that is shown to have maximum throughput. This reduced on a banyan network constraint satisfaction problem by using equivalence approach. To gain required computational speed, massive parallelism neural networks used. A design multiple overlapping winner-take-all circuits defined. be stable result only in cells. An efficient interface between...

Cognitive radios sense spectrum activity and apply policies in order to make decisions on when what bands they may communicate. These activities go beyond is done traditional This paper examines the denial of service vulnerabilities that are opened by these additional explores potential protection remedies can be applied. An analysis how vulnerable victim cognitive attacks presented along different axis, namely network architecture employed, access technique used awareness model. The goal...

Social media messaging applications(i.e. WhatsApp, Facebook) have reached 2.3 billion users in 2019, with the majority of emerging from developing countries. The high usage among emergent opens possibility designing text-based interventions for social change but such rely on experts (i.e. doctors, educators, and moderators) knowledge which is scarce contexts. Expert can be scaled up using chatbots more research needed to support who need context-specific as local language or may not regular...

Given multiple widespread stationary data sources such as ground-based sensors, an unmanned aircraft can fly over the sensors and gather via a wireless link. To minimize delays system resources, should collect at each node shortest trajectory. The trajectory planning is hampered by complex vehicle communication dynamics. We present method that allows ferry to optimize multi-node collection through unknown radio field using reinforcement learning. approach learns improved trajectories in situ...

This paper studies the carrier-to-interference ratio (CIR) and carrier-to-interference-plus-noise (CINR) performance at mobile station (MS) within a multi-tier network composed of M tiers wireless networks, with each tier modeled as homogeneous n-dimensional (n-D, n=1,2, 3) shotgun cellular system, where base (BS) distribution is given by Poisson point process in n-D. The CIR CINR MS single are thoroughly analyzed to simplify analysis network. For system parameters, following main results...