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In this paper the nodes in a WSN are considered as the sinks dealing with different applications, which hieratically make up the network application. Ontology is used to semantically describe the application, so that nodes directly process and transmit application rather than data. Based on application semantics, a new hybrid application semantic MAC (AS-MAC) is put forward. Nodes send sub-tasks containing...
In order to resolve the problems of reducing the data transmission and prolonging the network lifetime of the wireless sensor network (WSN) in the case of the nodes deployed randomly, this paper puts forward a cluster compressive data gathering (CCDG) method based on pretreatment. The method can be realized through the following two steps: Firstly, the original sensor readings received from all nodes...
As wireless sensor networks are constituted of nodes with limited life batteries, energy efficiency is a very important metric at all levels of system design. Therefore, performing optimal modulation schemes is a crucial task at the physical layer of this class of networks. This paper investigates the best modulation strategy to minimize the total energy consumption required to send a given number...
Wireless sensor network (WSN) applied on bridge health monitoring has attracted considerable attention for its advantages such as self-organization, micro-structure, low cost and high flexibility. The performances of WSNs are extremely correlated with application scenarios and even the same protocol may results in an obvious performance difference on various applications. However, no one has studied...
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