In this paper, for decrease transmissions delay in wireless sensor and actor network is suggested... more In this paper, for decrease transmissions delay in wireless sensor and actor network is suggested a distributed algorithm. Energy consumption is very important issue because they have limited energy. Current protocols due to have transmission delay in sending data among nodes cause increase consuming energy in network. Proposed algorithm is based on distributed algorithm and can solve this problem somewhat. In this algorithm, a distinguished node sends time values along a spanning tree structure periodically. One of the most important advantages of the algorithm is purely distributed and local. It does not depend on a fixed structure for disseminating time values. In conclusion, results gained shows that suggested protocol decrease transmissions delay of wireless network above 30 percent compared to the existing approaches.
Arithmetic grids are a new instance in distributed and parallel computing systems. They can reali... more Arithmetic grids are a new instance in distributed and parallel computing systems. They can realize a virtual supercomputer over idle resources available in a wide area network like the Internet. The grids are characterized for exploiting highly heterogeneous resources. They focus on arithmetic grids to reach high performance by using effective map tasks onto heterogeneous resources. Generally, the mapping tasks are realized by online and batch methods. In the batch mode at any mapping event a batch of tasks are mapped, whereas in online mode only one task is mapped. In this paper, four on-line mode mapping algorithms based on learning automata are introduced. To show the effectiveness of the proposed algorithms, computer simulation has been conducted. The results of experiments show that the proposed algorithms outperform two best existing mapping algorithms when machine heterogeneity high.
In wireless sensor networks energy is a very important issue because these networks consist of lo... more In wireless sensor networks energy is a very important issue because these networks consist of lowpower sensor nodes. This paper proposes a new protocol to reach energy efficiency. The protocol has a different priority in energy efficiency as reducing energy consumption in nodes, prolonging lifetime of the whole network, increasing system reliability, increasing the load balance of the network, and reducing packet delays in the network. In the new protocol is proposed an intelligent routing protocol algorithm. It is based on reinforcement learning techniques. In the first step of the protocol, a new clustering method is applied to the network and the network is established using a connected graph. Then data is transmitted using the -value parameter of reinforcement learning technique. The simulation results show that our protocol has improvement in different parameters such as network lifetime, packet delivery, packet delay, and network balance.
Security approaches in wireless sensor networks due to limitation of energy and resource are diff... more Security approaches in wireless sensor networks due to limitation of energy and resource are different from traditional protocols in current networks. So, many security problems exist such as authentication, integrity, digital signature and etc., and there has been relatively little research suited for wireless sensor networks. We proposed an enhanced version of scheme on dynamically clustering in wireless sensor network protocol. In comparison with the previous scheme, our proposed scheme possesses many advantages, including resistance to the replay and forgery attacks, reduction of user’s password leakage risk, capability of renewing password, and better efficiency.
In this paper, for decrease transmissions delay in wireless sensor and actor network is suggested... more In this paper, for decrease transmissions delay in wireless sensor and actor network is suggested a distributed algorithm. Energy consumption is very important issue because they have limited energy. Current protocols due to have transmission delay in sending data among nodes cause increase consuming energy in network. Proposed algorithm is based on distributed algorithm and can solve this problem somewhat. In this algorithm, a distinguished node sends time values along a spanning tree structure periodically. One of the most important advantages of the algorithm is purely distributed and local. It does not depend on a fixed structure for disseminating time values. In conclusion, results gained shows that suggested protocol decrease transmissions delay of wireless network above 30 percent compared to the existing approaches.
Arithmetic grids are a new instance in distributed and parallel computing systems. They can reali... more Arithmetic grids are a new instance in distributed and parallel computing systems. They can realize a virtual supercomputer over idle resources available in a wide area network like the Internet. The grids are characterized for exploiting highly heterogeneous resources. They focus on arithmetic grids to reach high performance by using effective map tasks onto heterogeneous resources. Generally, the mapping tasks are realized by online and batch methods. In the batch mode at any mapping event a batch of tasks are mapped, whereas in online mode only one task is mapped. In this paper, four on-line mode mapping algorithms based on learning automata are introduced. To show the effectiveness of the proposed algorithms, computer simulation has been conducted. The results of experiments show that the proposed algorithms outperform two best existing mapping algorithms when machine heterogeneity high.
In wireless sensor networks energy is a very important issue because these networks consist of lo... more In wireless sensor networks energy is a very important issue because these networks consist of lowpower sensor nodes. This paper proposes a new protocol to reach energy efficiency. The protocol has a different priority in energy efficiency as reducing energy consumption in nodes, prolonging lifetime of the whole network, increasing system reliability, increasing the load balance of the network, and reducing packet delays in the network. In the new protocol is proposed an intelligent routing protocol algorithm. It is based on reinforcement learning techniques. In the first step of the protocol, a new clustering method is applied to the network and the network is established using a connected graph. Then data is transmitted using the -value parameter of reinforcement learning technique. The simulation results show that our protocol has improvement in different parameters such as network lifetime, packet delivery, packet delay, and network balance.
Security approaches in wireless sensor networks due to limitation of energy and resource are diff... more Security approaches in wireless sensor networks due to limitation of energy and resource are different from traditional protocols in current networks. So, many security problems exist such as authentication, integrity, digital signature and etc., and there has been relatively little research suited for wireless sensor networks. We proposed an enhanced version of scheme on dynamically clustering in wireless sensor network protocol. In comparison with the previous scheme, our proposed scheme possesses many advantages, including resistance to the replay and forgery attacks, reduction of user’s password leakage risk, capability of renewing password, and better efficiency.
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Papers by Farzad Kiyani