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Topology control is one of core key factors which can influence performance of wireless-sensor networks (WSN). So how to design topology structure with high reliable and survivability is becoming the important subject on wireless-sensor networks. For the issue, a topology evolution strategy based on scale-free network with energy efficient is proposed. First by clustering algorithm cluster nodes are...
The current sensor networks are assumed to be designed for specific applications, having strongly coupled data communication protocols. The future sensor networks are envisioned as comprising heterogeneous devices assisting to a large range of applications. To achieve this goal, we propose a Web Services approach for the design of sensor networks, in which sensor nodes are service providers and applications...
Nodes of wireless sensor networks (WSN) may fail easily due to the lack of energy or disaster scenarios. Such failures can severely reduce the persistence and collection efficiency of sensed data. Network coding technology can be employed to enhance the data persistence of wireless sensor network, but it may cause serious "cliff effect" in decoding process. In this paper, the influence of...
This paper proposes a comprehensive routing protocol (CRP) based on the ant colony algorithm for the applications of Wireless Sensor Network (WSN). It is a protocol taking both the lifetime of network and the arrival rate of data packet into account. In CRP, multiple paths are found between source and destination, and sub-optimal paths are used occasionally referring to the probabilistic forwarding...
This paper proposes a routing protocol for the applications of Wireless Sensor Network (WSN). It is a protocol based on the PEGASIS protocol but using an improved ant colony algorithm rather than the greedy algorithm to construct the chain. Compared with the original PEGASIS, this one, PEG-ant, can achieve a global optimization. It forms a chain that makes the path more even-distributed and the total...
Aiming at the shortage of LEACH protocol, a new routing protocol CDS-EBRP is proposed in this paper, CDS-EBRP fully takes account of the energy consumption of individual node and entire network, a rational transmission path from nodes of network to sink node is searched, Aiming at the network topology changes which are caused by the dead of cluster head nodes, the invalidation of cluster member nodes...
Aiming at the limited resources and data transmission redundancy of WSN, this paper proposes a novel data compression algorithm based on lifting wavelet transform, gives the rational design. The algorithm distributes the computing quantity which the lifting wavelet transform requires to all nodes, eliminates extra computing and data transmission, reduces the information redundancy of network, greatly...
A new power management circuit which includes energy conversion sub-system (photovoltaic battery),energy storage sub-system(lithium-ion battery+ultracapacitor energy conversion sub-system) and power management sub-system is designed. The power management circuit provides electricity to the wireless sensor node. The energy conversion sub-system adopts four solar photovoltaic batteries to capture energy...
In most sensor network applications, the information gathered by sensors will be meaningless without the location of the sensor nodes. Node localization has been a topic of active research in recent years. Accurate self-localization capability is highly desirable in wireless sensor network. This paper proposes a genetic algorithm based localization (GAL). The proposed genetic algorithm adopts two...
In most sensor network applications, the information gathered by sensors will be meaningless without the location of the sensor nodes. Node localization has been a topic of active research in recent years. Accurate self-localization capability is highly desirable in wireless sensor network (WSN). This paper proposes a new centralized localization algorithm for WSN. Given the distances between a sensor...
In most sensor network applications, the information gathered by sensors will be meaningless without the location of the sensor nodes. Node localization has been a topic of active research in recent years. Accurate self-localization capability is highly desirable in wireless sensor network. A fundamental problem in distance-based sensor network localization is whether a given sensor network is uniquely...
In our research, we developed a new low-cost, minimize sensor node for collecting physiological data using wireless sensor network. This equipment can measure multi-electrophysiological data, including ECG, Pulse, Acceleration and Pressure. Then we can use the equipment to detect the physiological signal of the students during the learning process so as to assess the teaching effect.
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