2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Abbas Varmaghani ◽  
Ali Matin Nazar ◽  
Mohsen Ahmadi ◽  
Abbas Sharifi ◽  
Saeid Jafarzadeh Ghoushchi ◽  
...  

Advances in wireless technologies and small computing devices, wireless sensor networks can be superior technology in many applications. Energy supply constraints are one of the most critical measures because they limit the operation of the sensor network; therefore, the optimal use of node energy has always been one of the biggest challenges in wireless sensor networks. Moreover, due to the limited lifespan of nodes in WSN and energy management, increasing network life is one of the most critical challenges in WSN. In this investigation, two computational distributions are presented for a dynamic wireless sensor network; in this fog-based system, computing load was distributed using the optimistic and blind method between fog networks. The presented method with the main four steps is called Distribution-Map-Transfer-Combination (DMTC) method. Also, Fuzzy Multiple Attribute Decision-Making (Fuzzy MADM) is used for clustering and routing network based on the presented distribution methods. Results show that the optimistic method outperformed the blind one and reduced energy consumption, especially in extensive networks; however, in small WSNs, the blind scheme resulted in an energy efficiency network. Furthermore, network growth leads optimistic WSN to save higher energy in comparison with blinded ones. Based on the results of complexity analysis, the presented optimal and blind methods are improved by 28% and 48%, respectively.


2013 ◽  
Vol 397-400 ◽  
pp. 2641-2646 ◽  
Author(s):  
Yi Sun ◽  
Min Li ◽  
Peng Xu

Congestion in wireless sensor networks can affect the networks performance seriously,not only it has impact on data transmission and the quality of service, but also wastes energy and shortens the network lifetime. Aiming at this issue, this paper proposed a cross-layer congestion control algorithm based on traffic prediction (CCATP), it can take congestion mitigation measures in advance according to the prediction result. CCATP comprises three mechanisms: (i) congestion prediction; (ii) local congestion control mechanism based on backoff time adjustment; (iii) transmission route selection based global congestion control mechanism; Simulation experiment results show that CCATP can reduce the packet loss number and improve the energy efficiency significantly, so as to effectively improve the service performance of network.


2011 ◽  
Vol 311-313 ◽  
pp. 1642-1647
Author(s):  
Ping Ping Xiao ◽  
Yan Tao Tian

Congestion is an essential problem in wireless sensor networks. In view of resolving the problem of congestion, a novel congestion control algorithm is proposed based on rate optimization. It performs the estimation of congestion level in the cluster and between the clusters based on the distribution of queue length of the node, and uses the maximum utility function to optimize the sending rate of source nodes. In addition, the algorithm adopts the cluster structure to prolong the system lifetime. The simulation results show that ROCC can prevent effectively and alleviate the congestion, and dynamic adjust the sending rate of source nodes while controlling congestion.


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