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Underwater sensor networks are bounded by data sensing, transmitting, and forwarding limitations. The transmitting of large volumes of data can require a large amount of time and power. This has led researchers to focus on the new technology of underwater computing systems, in which information is extracted under the water using embedded processors via data mining and/or data compression. In this...
Current trends in the development of industrial applications enforce the use of wireless networks to communicate the system nodes mainly to increase flexibility and reliability of these applications and to reduce the implementation cost. However, in control applications, as consequence of the latency and jitter generated by the network, not always the results achieved by the experimental results and...
Due to the development and proliferation of ubiquitous technologies and services, various sensor network applications are being appeared on the stage. The needs for algorithms requiring complex signal processing with a high-performance processor such as digital signal processor are also increased. However, it is difficult to use such processor for the low-power sensor network operating with a battery...
The wireless smart camera networks is defined in this paper. Its system architecture, characteristics and application direction are introduced. And then, the key factors are analyzed in designing and developing of wireless smart camera network platforms. According to the mote architecture, the platforms are divided into two categories: detached platforms and combinative platforms, and are analyzed...
This paper presents a single chip VLSI architecture of wireless image sensor node, which is constituted by an enhanced embedded 8051 microcontroller, a CMOS camera interface and hardware accelerators. The algorithms and control flows of the IEEE 802.15.4 MAC layer are accelerated by hardware, results in 45% less code size compared with the conventional software stack. An innovated CFA preprocessing...
Building a wireless sensor network first of all requires the constituting nodes to be developed and available. These nodes have to met the requirements that come from the specific requirements of a given application. They might be small, cheap (energy efficient), they have to be equipped with the right sensors, the necessary computation and memory resources, and they need adequate communication facilities,...
This paper proposes self-deploying approaches for sensor networks. The gravitational field (GF) and the radioactive decay (RD) are used to model the repulsion forces between sensor nodes. The Received Signal Strength (RSS) is transformed to the repulsion force for computing the next move distance and direction. The GF approach reduces the power consumption on communication overheads while the RD approach...
In wireless sensor network nodes all tasks are controlled and scheduled by the CPU of the node. It is activated repeatedly from its low-power sleep mode for e.g., measurements and communications tasks. The periodic wake-ups cause a high overhead in power consumption. This problem can be solved by supplementing the CPU with additional modules which autonomously execute selected tasks to enable the...
Nanotechnology is enabling the development of devices in a scale ranging from one to a few one hundred nanometers. Nanonetworks, i.e., the interconnection of nano-scale devices, are expected to expand the capabilities of single nano-machines by allowing them to cooperate and share information. Traditional communication technologies are not directly suitable for nanonetworks mainly due to the size...
Since the mid of 1990s, terrestrial wireless sensor network is developing quickly. However, constrained by certain characteristics of underwater acoustic channel such as limited available bandwidth and large propagation delays, which means development of underwater sensor networks, the extension of the concept of terrestrial wireless sensor network in ocean application, lags behind that of terrestrial...
Device centric service-oriented architectures have shown to be applicable in the automation industry for interconnecting manufacturing devices and enterprise systems, thus, establishing comprehensive heterogeneous service architectures. A similar scenario can also be found in the domain of integrated circuits where a growing number of components is being interconnected by a network inside a single...
The PermaSense project has set the ambitious goal of gathering real-time environmental data for high-mountain permafrost in unattended operation over multiple years. This paper discusses the specialized sensing and data recovery architecture tailored to meet the precision, reliability and durability requirements of scientists utilizing the data for model validation. We present a custom sensor interface...
We demonstrate low-power, integrated laser-based trace-gas chemical sensor systems which directly interface to the Telos wireless sensor networking (WSN) modules. We will demonstrate a prototype sensor which measures atmospheric oxygen concentration configured as a battery powered, handheld unit with power consumption <0.3 W, sensitivity of 0.07%, high specificity, and the robustness required for...
These wireless ad hoc sensor networks (WSNs) have received considerable academia research attention at present. The main purpose of a sensor network is information gathering and delivery. Therefore, the quantity and quality of the data delivered to the end-user is very important. The energy-constrained sensor nodes in WSNs operate on limited batteries, so it is a very important issue to use energy...
We propose the use of a reconfigurable hardware architecture to reduce the power consumption of small sensor node that has various sensors and wireless communication facilities, that were the result of an adaptive function specialization mechanism. Traditional sensor nodes must have had a powerful and multi functional Micro-Controller Unit (MCU) to satisfy the requirements for processing any kinds...
The wireless mesh network (WMN) is a promising solution to support wireless broadband applications. However, mesh networks face the power unfairness issue. Compared to the users far away from the gateway, the users near the gateway have to relay more traffic and consume more power. This paper proposes a scalable ring-based WMN that can ensure power fairness among users by adjusting its ring widths...
Driven by emerging standards, increasing energy costs, and advances in Wireless Sensor Networking, the ldquosmart homerdquo is becoming a reality for the mass market. Over a decade, professional installers have been using proprietary systems, with emergence of standards such as Zigbee, cost effective low-data rate, home solutions are now realizable. This paper presents a cluster based home area network...
Current trends in wireless communications emphasize the development of UWB (Ultra-Wide Band with bandwidths greater than 500 MHz or 20% of center frequency) radios. As the size of the digital part scales down, more and more components are being pushed into the digital domain. As a consequence of this, in receiver architectures, the ADCs are being pushed more towards the antenna in the front end. This...
Innovation in gateways for data gathering sensor networks has lagged compared to advances in mote-class devices, leaving us with a limited set of options for deploying such systems. In this paper we outline the system design of a gateway that meets the hardware and software demands of data gathering networks and present a prototype implementation of this design using the popular Stargate platform...
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