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We developed a field management system with a field server that helps decrease farmers workload. It will be also enable the transfer of knowledge to the next generation of farmers in Japan. In order to reduce the burden of agricultural work, less frequent maintenance of the field server is desired. In this paper, we explain construction method of a local wireless network to cut the power consumption...
With the continuous progress of rural construction, the problem of rural drinking water pollution is increasingly prominent. In view of water pollution, a design of rural drinking water monitoring system based on wireless sensor networks is proposed that nodes take STM32 as the core chip and WLK01L39 as well as its peripheral circuits are used as wireless communication modules and Beidou S1216 is...
We present the design, development, and deployment of an inexpensive, power-efficient, clustered, and scalable wireless sensor network (WSN) testbed. The testbed operates in a harsh environment in which neither GPS nor Internet connectivity are available. We use this testbed to collect real-time data during football games and other major events at Bobby Dodd stadium at Georgia Tech. The sensing devices...
The idea of Internet of Things has grown into multiple dimensions, encompassing also the industrial world leading to initiatives like Factories of the Future (FoF) or Industrial Internet. Wireless Sensor and Actuator Networks (WSAN) play an important role in this professional domain. Their successful deployment in real-world applications calls for advanced testing and debugging effort in advance....
This research paper presents the design of a proposed synchronization wireless algorithm based on message digest (SWAMD) as an aid to assist data synchronization between the mobile device database and the server-side database. SWAMD proposes storing images from the server-side database and the mobile device database in a message digest table in order to easily compare two images and pinpoint the rows...
This paper presents a method for time base synchronization between independent nodes which communicate over a wireless medium. It is shown that the malicious effects of multipath propagation are minimized and precise time base synchronization is achieved.
This paper presents a method for time base synchronization between independent nodes which communicate over a wireless medium. It is shown that the malicious effects of multipath propagation are minimized and precise time base synchronization is achieved.
Structural health monitoring (SHM) systems have excellent potential to improve the regular operation and maintenance of structures. Wireless networks (WNs) have been used to avoid the high cost of traditional generic wired systems. The most important limitation of SHM wireless systems is time-synchronization accuracy, scalability, and reliability. A complete wireless system for structural identification...
In today's Internet age, web-based applications are an extremely logical way to disseminate, update, and visualize information. Our modern wired infrastructure and high-speed wireless access points make it possible to access high-bandwidth demanding applications from nearly everywhere. However, in places where infrastructure does not exist, and where information needs to be disseminated over areas...
Online financial transactions using mobile devices is a convenient solution for future payment systems. However, security on the wireless channel and the cost of an Internet connection on the mobile device limit its adoption and feasibility. This paper presents a solution that uses an Infra-red link between the mobile device and a dongle connected to a Point of Sale (POS) which in turn is connected...
Host identification, today, can be done at many layers of the network protocol stack depending on the identifiable parameter used for classification. But, these generally include fields from TCP/IP/MAC packets; that can be spoofed or manipulated very easily to misguide the identification process or include intolerable error into. Identification on wireless networks can be done with better precision...
The development of mobile information systems has brought more advantages for mobile users, enabling them to use mobile devices to get information everywhere and at anytime. However, the application development has limitations due to wireless communications and mobile devices. Caching method needs to overcome some of these difficulties. There are many issues related to caching method, among which...
Waiting time-optimal scheduling of items for broadcasting in wireless environments requires knowledge of their corresponding access probabilities. Feedback mechanisms have been proposed, according to which the clients notify the server of their needs directly or indirectly. This feedback is then processed at the server, producing the items' access probability distribution function estimate. Based...
The objective of Synchronization In wireless sensor network is to synchronize the various sensor nodes which are distributed as well as moving in a network. Synchronization is an important problem in communication networks especially for real time applications. There may be one base station of 1000 sensor nodes moving in the network. Synchronization is considered a particularly difficult in wireless...
Shrinking process tolerances due to decreasing device sizes and increasing chip complexity in semiconductor manufacturing are motivating efforts to improve methods of equipment data acquisition (EDA). Prior work shows that the lack of precise time-stamping and clock synchronization is a critical hindrance to reliable data acquisition and real-time process control systems. The ultimate goal in the...
Wireless sensor networks for structural health monitoring (SHM) application have attracted much research interest over the last few years because of their great potential to monitor and maintain the safety of civil structures. This paper puts forward an effective, feasible and reliable wireless sensor system based on ZigBee technology, which can support monitoring structural health such as buildings,...
Nowadays, RFID (Radio Frequency Identification) mobile middleware technology is gaining growing attention due to its competitive business prospect and value. With the ability to be automatically identified and collect information, RFID mobile systems have been applied to various fields. Meanwhile, advancements in wireless communication technology have greatly increased the functionality of mobile...
A wired testbed's usefulness for wireless research hinges on its ability to faithfully reproduce the wireless medium. One of the key properties of a wireless medium is its broadcast nature. Wireless broadcast behavior is used in applications such as cell phone and satellite networks to disseminate the same data to multiple users as well as perform time synchronization. In this paper, we investigate...
Wireless distributed network is a distributed system based on wireless communication technology to achieve resource share and cooperation. With the gradual consummation of wireless communication network, wireless distributed network has played a more and more important role in distributed testing and controlling field. SMS is a simple text transfer protocol on GSM network. It has been widely used...
This paper deals with the problem of coexistence of wireless sensor networks (WSNs) for industrial applications, proposing new approaches. In fact, if several WSNs operate in the same area, the reliability of the system rapidly decreases, especially if static radio channel assignment WSNs and frequency hopping WSNs are mixed. The proposed architecture is based on a collaborative approach that exploits...
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