Abstract
A wireless sensor network (WSNs) technology determines physical properties of the environment through detection of unusual events. The sensor consists of small mini computers powered by batteries and use radio communication for the exchange of information it gathers. The sensors are able to collect the data and exchange the information with all the nodes that were affected and triggered during the event detection. Although the technology has been in use for a period of time it has been noted that there is lateness of the event detection by the technology. Therefore the essence of this paper is to describe the factors affecting the lateness detection of events by WSNs. From the experiment it is evident that varying distance of the sensor nodes to the base station and the transmission power affect the packet data transmission efficiency and thus lateness detection of events. Power level at 5 dBm (maximum level) ensures 90% of the event detected is communicated effectively to the base station whereas minimum power level at -10 dBm allows ineffective detection of events. At -10dBm the base station node could not detect a transmitted data packet at distances beyond 30 feet. Thus the application of any sensor node with the transmitting power at -10 dBm will only be effective at the distance less than 10ft. Therefore, distance of the sensor nodes and the transmission power of the WSNs affect the data packet delivery performance and hence lateness of event detection.
Highlights
A wireless sensor network (WSNs) is a technology which has been in use for a period of time to determine physical properties of the environment
The application of any sensor node with the transmitting power at -10 dBm will only be effective at the distance less than 10ft
The wireless sensor network consists of small mini computers which are powered by batteries and use radio communication for the exchange of information it gathers from different sensors
Summary
A wireless sensor network (WSNs) is a technology which has been in use for a period of time to determine physical properties of the environment. The design enables the wireless sensor networks to detect any unusual event as long as they can because the batteries are able to store energy for a long period of time. WSNs is able to detect events in its field of application by gathering the raw data from one to thousands nodes or sensors connected to it, recognizing what WSNs did previously and mapping the event and systematically transmit the event into the communication unit or central based station. Any false transmission or late detection of the event to the central based station leads to inappropriate communication between the networks. This paper is different from other papers because it is able to indicate the differences in lateness in event detection while other papers have been able to focus on the different applications of WSNs in different fields and the strengths of one technology over the other
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