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Spatially unbalanced energy consumption among sensors is the most important issue in Wireless Sensor Networks (WSNs). This uneven energy consumption can significantly reduce network lifetime. The use of sink mobility with constrained paths and decreasing the message flood by limiting the flood area can help to improve the energy efficiency in WSNs. Maximum Amount Shortest Path routing (MASP) is an...
Researchers and manufacturers are currently putting a lot of efforts to design, improve and deploy the Internet of Things, involving a significant number of constrained and low cost embedded devices deployed in large scales with low power consumption, low bandwidth and limited communication range. For instance we can easily build a network composed by multiple sensors distributed in a building in...
Topology change is the main factor that affects the network life time of Wireless Sensor Network (WSN) applications. In static WSN, the topology change is often caused by node failure which is due to energy depletion. However, in the Mobile WSN (MWSN), the main reason of the topology change is caused by the node movement. Since the mobile sensor nodes are limited in power supply and have a low radio...
ZACA-EEC (Zigbee Ant Colony Algorithm Energy Efficient Cluster) routing protocol is proposed to replace AODV in Zigbee with the aim of increasing reliability for mine equipment monitoring in this paper, which can prolong the lifetime of network remarkably. Taking hydraulic support as an example, the distribution of monitoring nodes can be simplified as chain hierarchy topology, then Free-space model...
The IETF Routing Over Low-power and Lossy Networks working group has recently proposed the IPv6 Routing Protocol for Low power and Lossy Networks, i.e., the RPL protocol. It has been designed to face the typical requirements of wireless sensor networks. Given its relevance in the industrial and scientific communities, this paper presents a performance analysis of RPL based on simulations. Our results...
In this paper, we propose a method to save energy consumption for the rejoin procedure of ZigBee networks. By skipping the active scan process, a rejoining node and its neighbors are able to save a large amount of energy. In addition, the rejoining node chooses the suitable potential parent by reserving and utilizing original neighbor table. This method is capable of reducing the number of rejoin...
This paper is to solve the problem of route resources waste in flow-based QoS routing protocol for WSN. Competition for limited resources will rose when there are two or more real time data flows between same source node and destination node, Variable ??port?? is set to identify different real time data flows before, which also leads to waste of route resources. Thus we set a time variable called...
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