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In this paper we consider a remote monitoring scenario where the monitoring center is geographically located far away from the region of the deployed sensor network, and the sensing data by the sensors is transmitted to the monitoring center through a third party telecommunication service, thus a cost associated with this service will be incurred, which is related to the amount of data successfully...
In this paper we consider a sensor network deployed far away from the base station. Each sensor in the network is equipped with two radio interfaces: the low-power IEEE 802.15.4 radio and the high-bandwidth 3G radio. The low-power radios are used on all sensors to transmit data within the network, while the high-bandwidth radios are activated only on a subset of sensors, referred to as gateways, for...
In this paper we investigate the benefits of placing optimal number of sinks for a wireless sensor network (WSN) to prolong the network lifetime, provided that the number of hops from each sensor to its nearest sink is no more than h>=1 and the sink location space is given in advance. We first formulate this problem as a joint optimization problem, which consists of finding the optimal number of...
For mining would destroy grassland ecosystem seriously, monitoring grassland degradation and analyzing its influence mechanism in mine areas can play an important role in grassland ecosystem restoration and reconstruction. This paper was mostly focused on the remotely-sensed monitoring of grassland degradation. We first computed NDVI (normalized difference vegetation index) in different time using...
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