Absence Of Communication Infrastructure Research Articles

Implementation of Fuzzy Logic on Watering Automation System for Palm Tree Planting Media Based on WSN

Currently, date palm farmers manually assess soil color and dryness without a definitive reference. Manual watering of date palms persists, although some gardens employ irrigation systems. The absence of communication infrastructure in plantations necessitates flexible network technology. The system comprises a DS18B20 soil temperature sensor and FC-28 soil moisture sensor. Temperature and humidity values identify soil dryness, determining water volume for date palm irrigation. Sensor data is stored on Arduino Uno, undergoes pre-programmed processing, and is then transmitted to the sink node via the LoRa Ra-02 communication module. The results of system testing can be concluded that the temperature and humidity sensors can detect the temperature and humidity of the growing media with a fairly small error rate. The use of fuzzy logic inference and watering automation goes according to plan. It is known that for a soil temperature of 25.31°C and soil moisture of 20%RH, the output volume of watering through the hardware is 15,31 liters. The communication module used as a data sender can also run well and stable at a range of up to 200 meters with RSSI = -105 and SNR = -7,1.

UAV-Aided Two-Way Relaying for Wireless Communications of Intelligent Robot Swarms

In this paper, we consider unmanned aerial vehicle (UAV)-enabled two-way relaying communications between two robot swarms in the absence of communication infrastructures in remote areas or post-disaster rescues. To be more specific, UAV is employed as the relay to expand the communication range between two disconnected ground robot swarms, due to its high maneuverability and flexible deployment. Meanwhile, the two-way relaying mode adopted can improve the transmission performance in terms of delay and throughput in comparison to the conventional one-way relaying, owing to the ability of allowing devices to exchange information simultaneously. In addition, the UAV's trajectory and power allocation are jointly optimized to maximize the sum-rate of the uplink and downlink, where the joint optimization problem is decoupled into two sub-problems to address the non-convexity. Limited to the non-convex formation of the objective function for the trajectory optimization sub-problem, we firstly handle the non-convexity based on successive convex approximation method, and then alternating optimization framework is carried out to obtain the joint suboptimal solution. Numerical results exhibit significant throughput gains of the proposed scheme as compared to other benchmark schemes.

On the Secure and Reconfigurable Multi-Layer Network Design for Critical Information Dissemination in the Internet of Battlefield Things (IoBT)

The Internet of things (IoT) is revolutionizing the management and control of automated systems leading to a paradigm shift in areas such as smart homes, smart cities, health care, transportation, etc. The IoT technology is also envisioned to play an important role in improving the effectiveness of military operations in battlefields. The interconnection of combat equipment and other battlefield resources for coordinated automated decisions is referred to as the Internet of battlefield things (IoBT). IoBT networks are significantly different from traditional IoT networks due to battlefield specific challenges such as the absence of communication infrastructure, heterogeneity of devices, and susceptibility to cyber-physical attacks. The combat efficiency and coordinated decision-making in war scenarios depends highly on real-time data collection, which in turn relies on the connectivity of the network and information dissemination in the presence of adversaries. This work aims to build the theoretical foundations of designing secure and reconfigurable IoBT networks. Leveraging the theories of stochastic geometry and mathematical epidemiology, we develop an integrated framework to quantify the information dissemination among heterogeneous network devices. Consequently, a tractable optimization problem is formulated that can assist commanders in cost effectively planning the network and reconfiguring it according to the changing mission requirements.

준-인프라 기반 무선 커뮤니티 네트워크 시험을 위한 가상 토폴로지 제어 시스템

Community network is a communication environment where heterogeneous devices can access and communicate with each other at any time and at any space to share information. To do so, mobile devices are required to be self-configured even in absence of communication infrastructures. Semi-infrastructured wireless ad-hoc network is a promising solution to meet with such a requirement. This paper proposes the VTC(virtual topology coordinator) system as an evaluation tool for examining network protocols that are intended to be deployed in the semi-infrastructured ad-hoc networks. VTC emulates multi-hops wireless network topology virtually using a mechanism of selective receiving MAC frame in a small area, where only a single hop communication is available. VTC system cannot consider all properties introduced in real wireless network, but do more wireless properties than verification through simulation.

Monitoring in a High-Arctic Environment: Some Lessons from MANA

Monitoring terrestrial high-Arctic ecosystems is difficult because of their limited access, extreme weather, and absence of communication infrastructure. A sensor-network-based data acquisition system in Zackenberg, Greenland, addresses these challenges.