A Complete Feasible and Nodes-Grouped Scheduling Algorithm for Wireless Rechargeable Sensor Networks in Tunnels

Abstract

Limited energy in each node is the major design constraint in wireless sensor networks (WSNs), especially in mine tunnel scenario where the WSNs are required to work perpetually. To overcome this limit, wireless rechargeable sensor networks (WRSNs) have been proposed and studied extensively over the last few years. To keep the sensor nodes working perpetually, one fundamental question is how to design the charging scheme. Considering the special tunnel scenario, this paper proposes a Complete Feasible Charging Strategy (CFCS) to ensure the whole WRSNs is working perpetually. We divide the whole WRSN into several subnetworks and use several mobile chargers (MCs) to charge every subnetwork periodically and orderly. For a subnetwork, we formulate the main problem as a charging time distribution problem. A series of theorems are deduced to restrict the charging configurations, and a group nodes mechanism is proposed to expand the scale of the WRSNs. Finally, we conduct extensive simulations to evaluate the performance of the proposed algorithms. The results demonstrate which of the CFCS boundary theorems is correct and that our proposed CFCS can keep the WRSNs working perpetually. Furthermore, our Nodes-Grouped mechanism can support more nodes in WRSN compared to the state-of-the-art baseline methods.

Ephemeral Secrets: Multi-Party Secret Key Acquisition for Secure IEEE 802.11 Mobile Ad Hoc Communication

“…The purpose of this experimentation was to see the applicability of proposed model for secret key establishment in scenarios where the wireless nodes are communicating in a grouped fashion such as cooperative nodes [70], non-chargeable or re-chargeable groups [71]. The purpose of referring these two articles is just to show, that, sometimes we need to establish secret key between group of nodes, such as military troupes, group of devices located and communicating on parts of the same body etc.…”

A Multi-Mode Sensor Management Approach in the Missions of Target Detecting and Tracking

“…As for the category of optimization algorithms, there are two main kinds, namely the centralized algorithm [28][29][30][31][32][33][34] and the distributed algorithm [35][36][37][38][39][40][41]. Compared with distributed algorithms, schemes obtained by centralized algorithms are better, but have slower computing speeds.…”

Distributed Cooperative Wireless Charging for the Mine Internet of Things

“…Wireless charging technology has been identified as one of the key technologies for coal mine safety. A complete feasible and nodes-grouped scheduling algorithm was proposed in [10] to charge nodes of Rechargeable Wireless Sensor Networks (RWSN) in mine tunnels, and the crosslayer optimization strategy for coal mine RWSN was studied in [11] to make nodes work perpetually. Research on wireless charging technology has been heavily funded.…”