List of Articles طول عمر شبکه

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  1 - A New Method to computational intelligence to improve network lifetime in wireless sensor networks
  faezeh talebian hassan khotanloo mansour esmaeilpour
  Recent advances in wireless electronic and communications provide us the ability to build small, economical sensors with low power consumption and many diverse applications. Limited energy capacity of sensors is a huge challenge that will affect these networks. Clusteri More

  Recent advances in wireless electronic and communications provide us the ability to build small, economical sensors with low power consumption and many diverse applications. Limited energy capacity of sensors is a huge challenge that will affect these networks. Clustering has been used as a well-known method to handle this challenge. To find appropriate location of clusters' heads, imperialist competitive algorithm as an emerging topic in computational intelligence has been used. Clusters' heads are connected in a three-level model so that cluster heads with low energy capacity and far from station are considered as level three indirectly communicating with base station. This eventually increases lifetime of wireless sensor networks. Manuscript profile
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  2 - Presenting a method based on computational intelligence to improve energy consumption in smart wireless sensor networks
  faezeh talebian حسن  ختن¬لو منصور  اسماعیل¬پور
  20.1001.1.27170411.1394.7.24.1.4
  Recent advances in the field of electronics and wireless communication have given the ability to design and manufacture sensors with low power consumption, small size, reasonable price and various uses. The limited energy capacity of sensors is a major challenge that af More

  Recent advances in the field of electronics and wireless communication have given the ability to design and manufacture sensors with low power consumption, small size, reasonable price and various uses. The limited energy capacity of sensors is a major challenge that affects these networks. Clustering is used as one of the well-known methods to manage this challenge. To find the suitable location of the cluster heads, the colonial competition algorithm, which is one of the branches of computational intelligence, has been used. Cluster heads are connected by a three-level model, so that cluster heads with low energy capacity and far from the station are known as the third level and exchange information indirectly with the base station. This increases the lifespan of wireless sensor networks Manuscript profile
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  3 - Increasing the lifetime of underwater acoustic sensor networks by optimal relay node placement
  zahra mihamadi mohadeseh soleimanpour daryush avasimoghaddam Siamak Talebi
  20.1001.1.27170411.1399.12.45.7.7
  Underwater acoustic sensor networks (UASNs) have gained growing importance due to their desirable features and wide spread practical applications in many communication fields. Due to the high cost of underwater sensor nodes as well as implementation complexity, increasi More

  Underwater acoustic sensor networks (UASNs) have gained growing importance due to their desirable features and wide spread practical applications in many communication fields. Due to the high cost of underwater sensor nodes as well as implementation complexity, increasing the lifetime of UASNs is an important issue. Although relay nodes have an important role in reducing the transmission distance and energy consumption. But the efficient RNP (Relay Node Placement) to avoid the critical sensor nodes' elimination is the main problem, i.e., to preserve the connected network. For this aim this paper presents an innovative solution called an Efficient Relay node Setting (ERS) algorithm, which involves formulating the Relay Node Placement (RNP) as a non-convex optimization problem. Actually, due to the Difference Convex (DC) constraints the proposed RNP problem is a non-convex problem and finding an optimal solution is complicated. However, a novel transformation can be applied to DC constraints which converts the problem into its convex programming equivalent. Application of the convex programming offers the advantage of readily computing a global optimal solution. Simulation results confirm the superiority of the proposed scheme over the competing RA method in terms of network lifetime and efficiency. Manuscript profile
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  4 - A RPL-based Routing Algorithm for Multimedia Traffic for the Internet of Things
  Mohammad Khansari Farzaneh Mortazavi
  20.1001.1.27170414.1400.13.47.10.6
  According to enormous growths in communication networks, multimedia data will play a significant role on the Internet of Things in the near future. High volume of multimedia data leads to challenges such as reducing network lifetime and congestion. In this paper, a new More

  According to enormous growths in communication networks, multimedia data will play a significant role on the Internet of Things in the near future. High volume of multimedia data leads to challenges such as reducing network lifetime and congestion. In this paper, a new objective function for the RPL routing protocol is proposed which addresses the characteristics of multimedia data in the routing process. In the objective function, node’s remaining energy and the remaining buffer capacity of nodes measures are combined using a weighted pair. In order to evaluate this method, input data is generated based on a video trace. Packet delivery ratio, network lifetime, nodes availability over the lifetime of the network, node energy distribution, and end-to-end delay are used to evaluate the proposed method. The evaluation results show that the proposed method increases the package delivery ratio compared to the standard RPL. This method also improves the lifetime of the nodes by distributing energy between the nodes in comparison with standard RPL and extends the node's availability over the lifetime of the network. Finally, it reduces the network congestion which led to a lower end-to-end delay. Manuscript profile