Major problems in the Medium Access Control (MAC) of Wireless Sensor Networks (WSNs) are: sleep/wake-up scheduling and its overhead, idle listening, collision, and the energy used for retransmission of collided packets. This paper focuses on these problems and proposes an adaptive quorum-based MAC protocol, Queen-MAC. This protocol independently and adaptively schedules nodes wake-up times, dec...

This paper introduces RL-MAC, a novel adaptive MediaAccess Control (MAC) protocol for Wireless Sensor Networks (WSN) that employs a reinforcement learning framework. Existing schemes centre around scheduling the nodes’ sleep and active periods as means of minimising the energy consumption. Recent protocols employ adaptive duty cycles as means of further optimising the energy utilisation. Howeve...

This paper describes the design and implementation of a distributed self-stabilizing clock synchronization algorithm based on the biological example of Asian Fireflies. Huge swarms of these fireflies use the principle of pulse coupled oscillators in order to synchronously emit light flashes to attract mating partners. When applying this algorithm to real sensor networks, typically, nodes cannot...

The scheduling algorithm is a fundamental design problem to allocate resources amongst different entities in distributive wireless sensor networks (WSNs). These sensor nodes have limited power and non-replenishable energy resources. In WSNs, the duty cycling mechanism is commonly used to save energy due to idle listening. On the other hand, a fixed duty cycling mechanism increases transmission ...

Real-time low-power wireless networks are increasingly being used in applications such as: Industrial Internet-ofThings, Smart City technologies, and critical infrastructure monitoring. These networks typically use time-slotted superframe techniques to ensure real-time performance. Often the time slots are assigned statically, and energy conservation is regulated to other mechanisms such as dut...

Intruder detection is an important application in Wireless Sensor Networks (WSNs). Barrier coverage, which requires much fewer sensors than full coverage, is broadly known as an appropriate model of coverage for such an application. However, previous works all focus on providing 1D barrier coverage on a thin belt region based on global network information. In this paper, we introduce the concep...

Wireless sensor devices are deployed to build the Internet of Things (IoT) based applications. Sensor devices are grouped to form Wireless Sensor Networks (WSN). Sensor energy charging is carried out with the battery replacement process. The Radio Frequency (RF) energy transfer techniques are adapted to build Wireless Powered Sensor Networks (WPSN). Electromagnetic Waves are used as a medium to...

The main contribution to the systematic uncertainties of Atmospheric Imaging Cherenkov Telescopes (IACTs) currently stems from the uncertainty in the determination of atmospheric properties for a given moment of observation. This technique uses the atmosphere as a calorimeter of gamma-ray induced atmospheric air showers and measures the amount of Cherenkov light collected by large mirrors and f...

Monitoring a given environment is a kind of major applications in wireless sensor networks. These WSNs should often meet special requirements, such as high throughput support, service differentiation support and energy efficiency. However, related works always emphasis on one or two of them, and hardly consider comprehensively. In this paper, we propose a new-style MAC protocol, which based on ...

Duty cycling is an important method for energy constrained sensor network systems to prolong lifetime. Current research on duty cycling is mainly based on such assumption that all the sensory coverage should be maintained while some nodes are sleeping. However, for the applications of target monitoring, it is not necessary anymore to keep the whole sensory coverage of the sensor network. It onl...