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We propose a unique Dynamic Sensing Scheduling (DSS) scheme to prolong the lifetime of a sensor network. Different from most existing works, we study the sensor network lifetime under two practical requirements: sensing coverage and network connectivity. A sensor node is considered critical if its depletion of energy would cause either a violation of the sensing coverage requirement (specified by...
A sensor network deployed for long-term monitoring shall sustain meanwhile provide as much useful sensory information (i.e., as high network utility) as possible. We propose a JCRA (Joint Charging and Rate Allocation) scheme to maximize the network utility while satisfying the network sustainability requirement. JCRA is designed based on the observation that the energy repository of a sensor node...
High echo energy is important in sonar systems to increase measurement range. A sufficient condition is derived and obtained to achieve high echo energy for pulse position modulation excitation sequences. This paper addresses echo energy analysis under the premise that crosstalk between different sonar transducers can be avoided. Experiments validate the derived sufficient condition.
Target localization system is one of the basic aspects for mobile robot navigation. One of the most popular navigation way is the navigation based on visual. But, this way is limited by the light and the field of view so that it can't accurately detect the targets in special environments. To resolve the above problem of target localization way based on visual, this paper has studied the sound source...
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