This research aims to develop a visual tracking system for UAV which guides drone track mobile robot and accurately land on it when stops moving. Two LEDs with different colors were installed the bottom of drone. The can detect heading angle distance between robot. flight velocity in pitch roll direction modified by PID control, so that flying speed are more accurate, quickly. tuning parameters...

The utilization of Internet Things (IoT) technology, especially in remote areas, is still relatively low, even though the technology required to implement smart farming or villages, which aims improve quality life people rural areas. high investment cost for IoT networks that use cellular Wi-Fi one causes slow implementation this technology. Our previous research has developed an alternative ne...

Multipath communication is a well-developed technology that enhances effectiveness and resilience. Moreover, it can flexibly utilize network resources through load balancing among available paths. However, traditionally, deploying such functions on devices costly due to the required configuration changes complicated signaling mechanisms devices’ control planes. Programming Protocol-indep...

WiFi-based localization became one of the main indoor localization techniques due to the ubiquity of WiFi connectivity. However, indoor environments exhibit complex wireless propagation characteristics. Typically, these characteristics are captured by constructing a fingerprint map for the different locations in the area of interest. This finger print requires significant overhead in manual con...

Rural areas have very low revenue potential. The major issue in providing low-cost broadband to rural areas is to provide reliable backhaul connections that spread over tens or even hundreds of miles, connecting villages to the nearest service provider. Along with aerial networks of Google and Facebook, there has been a considerable amount of research toward long-distance terrestrial WiFi links...

Licensed Assisted Access (LAA) is considered one of the latest groundbreaking innovations to provide high performance in future 5G. Coexistence schemes such as Listen Before Talk (LBT) and Carrier Sensing and Adaptive Transmission (CSAT) have been proven to be good methods to share spectrums, and they are WiFi friendly. In this paper, a modified LBT-based CSAT scheme is proposed which can effec...

The rapid development of mobile Internet has offered the opportunity for WiFi indoor positioning to come under the spotlight due to its low cost. However, nowadays the accuracy of WiFi indoor positioning cannot meet the demands of practical applications. To solve this problem, this paper proposes an improved WiFi indoor positioning algorithm by weighted fusion. The proposed algorithm is based o...

The growing popularity of wireless networks and mobile devices is starting to attract unwanted attention especially as potential targets for malicious activities reach critical mass. In this study, we try to quantify the threat from large-scale distributed attacks on wireless networks, and, more specifically, wifi networks in densely populated metropolitan areas. We focus on three likely attack...

In the Internet of Things (IoT), different wireless technologies will be used to build various micro-systems, which result mutual interference among these micro-systems. Specifically, ZigBee networks share the 2.4GHz ISM band with WiFi but have much lower transmission power. Therefore, the ZigBee networks inevitably suffer the interference from WiFi Networks. Unlike previous approaches that foc...

Ultra-wideband (UWB) and WiFi technologies have been widely proposed for the implementation of accurate and scalable indoor positioning systems (IPSs). Among different approaches, fingerprinting appears particularly suitable for WiFi IPSs and was also proposed for UWB IPSs, in order to cope with the decrease in accuracy of time of arrival (ToA)-based lateration schemes in the case of severe mul...