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For complex environment in the mine, a wireless sensor node location mechanism based on a combination of RSSI ranging and genetic simulated annealing algorithm is proposed. Wireless signal transmission loss model in the mine was researched and used for RSSI ranging. Location problem is as an optimization problem to locate by improved genetic simulated annealing algorithm. Simulation results show that...
Accomplishing data collection in WSNs by mobile elements (MEs) can reduce the amount of multi-hop communications in the network, which will decrease the energy consumption of sensors and prolong network lifetime. However, this may result in unacceptable data collection latency. The problem can be alleviated by reducing the traveling distance of the MEs with a genetic algorithm (GA) implementation...
A new method to design the wireless power transmission technology for medical endoscope is suggested. Discrete multiple coil structure with a driving system possessing the function of site-site wireless power transmission is adopted as the transmitting coils. Only the one that couples best with the receiving coil is selected to be driven to transmit power for medical endoscopes. It's theoretically...
Time synchronization is an important issue in wireless sensor network (WSN). Many applications of wireless sensor networks need local clocks of sensor nodes to be synchronized, requiring various degrees of precision. Some strict resources limitations of WSN make traditional synchronization methods unsuitable for it. Hence there are many synchronization algorithms for sensor networks specially. The...
Network of wireless micro-sensor for monitoring physical environments has emerged as an important new application area for wireless technology. The strength of security protocols and encryption algorithms for ad hoc sensor network has been focused. Random numbers play a crucial role in them, so the quality of random number becomes one of important indexes. Because key attributes of these new types...
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