Unmanned aerial vehicles (UAVs) platforms and terrestrial base stations (BSs) are jointly used for data collection in UAV-assisted Internet of Things (IoT) networks. UAV platforms also have capacity to improve the 3D positional precision of IoT networks, serving as aerial anchor nodes. In particular, UAV-assisted relaying is able to serve existing networks by enabling communication between two nodes suffering from blockages and by recovering the network in inaccessible disaster effected areas. In this chapter, we have observed scenario of UAV data gathering from sensor network, where each sensor scavenges energy from the data-collective UAV for its own information transmission; namely, after harvesting UAV energy by sensor nodes in second time instant UAV collects their data. In order to consider the possibility of the emergence of obstacles, which could block the line-of-sight (LOS) link among sensor nodes and UAV, and to remark the fluctuations of the LOS signal introduced by shadowing effect, we have premised Rician-shadowed fading channels model and analyzed the outage probability (OP) properties of such scenario. Rapidly converging infinite-series expression is provided for OP, and OP characteristics are observed and considered in the function of system parameters such as severity level of shadowing, target information rate, UAV coordinates, and the time ratio of wireless energy transfer (WET). Furthermore, communication in Hoyt fading environment has been observed, since it represents generalization of Rayleigh fading environment, most widely used non-LOS case scenario model. Closed-form expression for OP of the wireless sensor network (WSN) in Hoyt fading environment has been delivered. Also, the time allocation of downlink and uplink to minimize end-to-end OP subjected to UAV’s power profile. The impact of the target information rate and outage OP acceptable for required quality of service (QoS) and UAV’s hovering location is investigated.
UAV-Assisted Wireless Power Sensor Networks
Unmanned Syst. Tech.
Integration of Unmanned Aerial Vehicles in Wireless Communication and Networks ; Chapter : 4 ; 61-77
2012-02-24
17 pages
Article/Chapter (Book)
Electronic Resource
English
Wireless sensor network (WSN) , Unmanned aerial vehicle (UAV) , Wireless energy transfer (WET) , Hoyt fading channels , Rician-shadowed fading channels Engineering , Cyber-physical systems, IoT , Communications Engineering, Networks , Control, Robotics, Mechatronics , Transportation Technology and Traffic Engineering , Computational Intelligence , Artificial Intelligence
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