Geographic Routing (GR) algorithms, require nodes to periodically transmit HELLO messages to allow neighbors know their positions (beaconing mechanism). To reduce the control overhead due to these messages, beacon-less routing algorithms have recently been proposed. However, existing beacon-less algorithms have not considered realistic physical layers. Therefore, those algorithms cannot work pr...

In the IEEE 802.11 Power Save Mode (PSM) specified for Independent Basic Service Set (IBSS), time is divided into beacon intervals. At the beginning of each beacon interval, each station in the power save mode periodically wakes up for a duration called announcement traffic indication message (ATIM) window. The stations that have successfully transmitted ATIM frame within the ATIM window will c...

Non-speech audio navigation systems can be very effective mobility aids for persons with either temporary or permanent vision loss. Sound design has certainly been shown to be important in such devices [e.g. 1]. In this study we consider the added factor of capture radius. The capture radius of an auditory beacon is defined as the range at which the system considers a user to have reached the w...

The thermodynamic stability of certain mismatched base pairs has made the development of DNA sequence sensing systems challenging. Thus, the stability of fully matched and mismatched DNA oligonucleotides in the hydrated ionic liquid choline dihydrogen phosphate (choline dhp) was investigated. Mismatched base pairs were significantly destabilized in choline dhp relative to those in aqueous buffe...

The current IEEE 802.15.4 standard restricts the beacon enabled approach to star networks, while they support multi-hop networking in mesh but with no synchronization. In this paper there is proposal of a distributed IEEE802.15.4 MAC modification to improve GTS usability in cluster networks. Location of BOP in inactive period with Virtual GTS is proposed and throughput is observed for chain top...

There are currently 4 million Bluetooth Low Energy beacons, such as Apple’s iBeacons, deployed worldwide, with more being used in an increasingly wide variety of fields, from marketing to navigation. Yet, there is a lack of focus on the impact of security on beacon deployments. This report looks to capture an overview of current beacon deployments, the current vulnerabilities and risks present ...

Radio beacons on satellites can be used in conjunction with ground receivers to study the ionosphere. The flexibility of new wideband tuners and digital receiver platforms requires a modular, adaptable software chain to optimally process and interpret beacon overflight data. A python-based system was developed to track the beacon, filter noise, and convert the signal to baseband. The slow but i...

Node localization is one of the key technologies of wireless sensor networks (WSN). Due to the indoor environment requires a high positioning accuracy, an improved algorithm based on RSSI is put forward. In terms of RSSI ranging, the error correction coefficient received from self-correcting locator beacon nodes, and then had been applied to distance solving from unknown nodes to the beacon nod...

Problem statement: Vehicular Ad hoc Networks (VANET) is one of the most challenging research area in the field of Mobile Ad Hoc Networks. Approach: In this research we proposed a dynamic power adjustment protocol that will be used for sending the periodical safety message. (Beacon) based on the analysis of the channel status depending on the channel congestion and the power used for transmissio...

The mechanism for finding the position of sensor node is crucial for many sensor network applications. Most sensor networks which can tolerate coarse accuracy look range free localization mechanism as its solution. We have proposed a novel algorithm where beacon nodes are randomly distributed and sensor nodes estimates the beacon nodes at different levels according to signal strength. We determ...