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Wireless Personal Area Networks (WPANs) are getting popular in a variety of fields such as home/office automation, e-healthcare, etc. In WPANs, most devices are considerably energy constrained, so the communication protocol should be energy efficient. The IEEE 802.15.4 is designed as a standard protocol for low power, low data rate, low complexity and short range connections in WPANs. The standard...
Saving energy and prolonging network lifetime are key problem of wireless sensor networks (WSNS). In this paper, Maximum Lifetime data gathering in WSNS is considered, in which the WSNS is consists of a collection of aggregation trees together with the number of rounds each such tree which is required to be small, given the limited computation and communication resources of sensor nodes. We describe...
Along with the infiltration of wireless sensor network in every field of our life, sharing sensor network resources in Internet environment is one of key problems which must be solved by wireless sensor network application. This paper expounds Web Service technology and uses Web Service technical framework for reference to design a new kind of service-oriented sensor network structure. And finally,...
In recent years, greenhouse technology in agriculture is to automation, information technology direction with the IOT (internet of things) technology rapid development and wide application. In the paper, control networks and information networks integration of IOT technology has been studied based on the actual situation of agricultural production. Remote monitoring system with internet and wireless...
Optimal power allocation for pure relay networks utilizing repetition codes has drawn a great deal of attention. However, power allocation in a cooperative network, where users who act as relays for each other and who utilize non-trivial codes, remains a challenge. With the aid of theoretical frame error rate expressions, we explore the performance of adaptive power control for decode-and-forward...
The wireless local area network (WLAN) technology has a rapid development because its advantages of fast and high-efficient, flexible and easy in net building. Wireless network brings users convenient network service, but it also hides many security problems that hinder WLAN's development. This paper combines the accountability of IP address with trust routing to a second mechanism applied in WLAN...
The availability of real-time CAN-ECU data and the emerging vehicular networks are critical for advanced vehicle monitoring and control. This paper presents our integrated info-security scheme, real-time hardware/software solutions and their application scenarios. The core is the Integrated Info-Security Circuit Board to communicate with ECUs and sensors inside a vehicle through CAN Bus, LIN Bus,...
The Voronoi diagram is the one of most fundamentals in computation geometry. The coverage control, especially the barrier coverage, will benefit from this diagram. Using the Voronoi diagram, the coverage holes can be detected in short time. In the lax demands which only include the influence of two neighbor sensors, the minimal exposure track based on the Voronoi can approach the optimal. But, because...
Fast and efficient neighbor discovery is crucial to the deployment of wireless ad hoc networks. Conventional random access neighbor discovery schemes assume a collision model for the medium access control layer and require each neighbor to transmit its identity repeatedly with random delay to resolve collision. This paper proposes a compressed neighbor discovery scheme which jointly detect all neighbors...
Energy-saving is one of the inevitable problems of the routing design in wireless sensor networks. The article obtains network routings by genetic algorithm, and the genetic algorithm has been improved by using data fusion and the model of wireless energy transmission. The simulation results show that the improved algorithm has made great progress in balancing the consumption of energy so as to prolong...
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