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Sink mobility has been proven to be an effective way for minimizing delay in data delivery and mitigating the hot spot problem in wireless sensor networks (WSNs). However, there is an impact of the path selection for the mobile sink on the data delivery delay. Hence selection of optimal number of halting positions called rendezvous points (RPs) and their locations are challenging in WSNs. In this...
Wireless Sensor Networks with Mobile Sinks (WSN-MSs) are considered a viable alternative to the heavy cost of deployment of traditional wireless sensing infrastructures at scale. However, current state-of-the-art approaches perform poorly in practice due to their requirement of mobility prediction and specific assumptions on network topology. In this paper, we focus on low-delay and high-throughput...
Considering the significance of load sensitive, delay tolerant and reliable data gathering in wireless sensor networks (WSNs), in this paper a handoff optimization and dynamic link quality estimation based forwarding route selection algorithms have been developed for single mobile sink nodes based data gathering in WSNs. The proposed approach functions in three phase, first node discovery to identify...
Mobile sink plays a pivotal role for data collection in wireless sensor networks (WSNs). But, sensor nodes close to mobile sink are bound to change their routes to Base Station(BS) or mobile sink frequently. As a result, they will generate excessive energy consumption of sensors and cause a very large delivery delay. In this paper, an energy-efficient mechanism for data collection based on single...
Underwater Wireless Sensor Networks (UWSNs) enable a wide range of aquatic applications. But the underlying physical layer technology makes the development of efficient data collection and routing schemes for UWSNs a challenging issue. It is important for the UWSNs to have maximum possible lifetime, because the recharging or replacement of sensor nodes after deployment is almost impossible. We propose...
Wireless sensor networks (WSNs) uses mobile sink to reduce the energy consumption of nodes and to prevent the formation of energy holes. Within a given time constraint all sensed data should be collected. Here mobile-sink node only visits rendezvous points (RPs). If Sensor nodes are not RPs then forward its sensed data via multi hopping to the nearest RP. The basic problem is computing a tour that...
With the advance of energy harvesting technology, more and more sensors now are powered by ambient energy. Energy harvesting sensor networks are a key step in paving the way for truly green systems that can operate ‘perpetually’ and do not adversely impact on the environment. In this paper we consider quality data collection in an energy harvesting sensor network by exploring sink mobility. That is,...
The real-world node deployment aspect is investigated, while considering cost minimization for resolving the energy hole around the sink, which represents a serious problem in typical sensor networks with uniform distribution. A novel strategy is proposed that is based on the use of two sinks and a few extra relay nodes close to the sinks' areas. The traffic is then alternatively sent to the sinks...
With the aim of prolonging network lifetime, many energy efficient algorithms and data dissemination protocols have been proposed for wireless sensor networks (WSNs) recently. Since sensor nodes close to sink have to bear more traffic burden to forward data, they will quickly deplete their energy which leads to energy hole and network partition problem. Adding mobility into sensor networks brings...
Contextual data collection is a major challenge in mobile sensor networks, in which sources generate quality-stamped context and mobile nodes (collectors) attempt to gather context of high quality. We deal with the context collection problem, in which collectors forage for high quality context and, then, deliver it to mobile context-aware applications. Collectors undergo a context collection process...
In wireless sensor networks (WSNs), the sink mobility along a constrained path can improve the energy efficiency. The mobile sink collects data from randomly deployed sensor nodes with constant speed has limited communication time. This causes difficulties in improving the network lifetime and efficient energy consumption. The recent advances in WSNs which leads to many new protocols specifically...
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