Wireless mobile devices such as high-end cell phones, PDAs, portable gaming devices, tablet PCs etc. all having wireless networking capabilities have a tremendous increase in recent years. These devices when used in Mobile Ad Hoc Networks (MANETs) may extend their capabilities, e.g., to reach the Internet when no Wi-Fi base stations are within range, or to have communication with each other ove...

—Efficiently using scarce energy is more critical for the nodes which are supplied by energy harvesting. However, it is difficult to optimize the transmit energy of each retransmission when future Channel State Information (CSI) and accurate retransmission number cannot be obtained in Hybrid Automatic Repeat Request (HARQ) system. In this paper, we propose a novel HARQ scheme to allocate the b...

In this paper, we propose a coverage measurement protocol (CMP) which can provide the base station an accurate and in-time measurement of the current connected coverage in an energy-efficient way, and our CMP is location-error tolerant. Moreover, the major component of our CMP, i.e., BOundary Node Detection (BOND) scheme, can be reused to provide many other functionalities for WSNs.

Replacing fossil flues by renewable and sustainable energies have been the concern of scientists working in this area over the recent decades. Furthermore, greenhouses play a key role in producing various crops year-round and in bohemian climates. For this objective, the greenhouses employ heating, ventilating and air conditioning (HVAC) systems to provide the favourable conditions for the cons...

Wireless sensor networks are composed of a large number of sensor nodes with limited energy resources. One critical issue in wireless sensor networks is how to gather sensed information in an energy efficient way since the energy is limited. The clustering algorithm is a technique used to reduce energy consumption. It can improve the scalability and lifetime of wireless sensor network. In this ...

---------------------------------------------------------------------***--------------------------------------------------------------------Abstract Wireless sensor network (WSN) is distributed over an area and sensors are devoted to task for controlling and monitoring the physical condition of the environment. Interesting application in wireless sensor network is Object Tracking Sensor Network...

Existing move-restricted node self-deployment algorithms are based on a fixed node communication radius, evaluate the performance based on network coverage or the connectivity rate and do not consider the number of nodes near the sink node and the energy consumption distribution of the network topology, thereby degrading network reliability and the energy consumption balance. Therefore, we prop...

In this paper, a new hybrid routing protocol is presented for low power Wireless Sensor Networks (WSNs). The new system uses an integrated piezoelectric energy harvester to increase the network lifetime. Power dissipation is one of the most important factors affecting lifetime of a WSN. An innovative cluster head selection technique using Cuckoo optimization algorithm has been used in the desig...

DTN probabilistic routing protocols forwards message to a node that holds high predictability value to meet its destination. However, the message replication continues on the high probable peers while high probable peers continue to receive the transmissions from multiple sources. Such rampant transmissions drain out the battery and node can go to the dead state thus will not be able receive it...

Future smart environments will be characterized by multiple nodes that sense, collect, and disseminate information about environmental phenomena through a wireless network. In this paper, we define a set of applications that require a new form of distributed knowledge about the environment, referred to as non-uniform information granularity. By non-uniform information granularity we mean that t...