Firefly-Inspired Synchronicity with a Weighted Factor for Wireless Sensor Networks

2015 ◽  
Vol 742 ◽  
pp. 27-31
Author(s):  
Hai Lei Zhao ◽  
Ping Song ◽  
Chuang Bo Hao
Keyword(s):  
Wireless Sensor Networks ◽  
Wireless Sensor ◽  
Strength Parameters ◽  
Great Resistance ◽  
Good Balance ◽  
Message Delay ◽  
Phase Increment ◽  
Acceptable Range ◽  
Weighted Factor ◽  
Speed And Accuracy

Firefly-inspired synchronicity method using reackback response is effective with existence of message delay. We introduce a weighted factor based on RSSI into the phase increment calculation. Besides, different coupling strength parameters are selected according to the degree of synchronicity to achieve a good balance between synchronicity speed and accuracy. Simulink module is constructed and the results prove that this method shows great resistance against random variation of the message delay within an acceptable range.

scholarly journals Performance Analysis of Time Synchronization Protocols in Wireless Sensor Networks

Sensors ◽  
2019 ◽  
Vol 19 (13) ◽  
pp. 3020 ◽  
Author(s):  
Linh-An Phan ◽  
Taejoon Kim ◽  
Taehong Kim ◽  
JaeSeang Lee ◽  
Jae-Hyun Ham
Keyword(s):  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Network Topology ◽  
Time Synchronization ◽  
Wireless Sensor ◽  
Message Delay ◽  
Delay Jitter ◽  
Error Accumulation ◽  
Flooding Time ◽  
Synchronization Protocol

The time synchronization protocol is indispensable in various applications of wireless sensor networks, such as scheduling, monitoring, and tracking. Numerous protocols and algorithms have been proposed in recent decades, and many of them provide micro-scale resolutions. However, designing and implementing a time synchronization protocol in a practical wireless network is very challenging compared to implementation in a wired network; this is because its performance can be deteriorated significantly by many factors, including hardware quality, message delay jitter, ambient environment, and network topology. In this study, we measure the performance of the Flooding Time Synchronization Protocol (FTSP) and Gradient Time Synchronization Protocol (GTSP) in terms of practical network conditions, such as message delay jitter, synchronization period, network topology, and packet loss. This study provides insights into the operation and optimization of time synchronization protocols. In addition, the performance evaluation identifies that FTSP is highly affected by message delay jitter due to error accumulation over multi-hops. We demonstrate that the proposed extended version of the FTSP (E-FTSP) alleviates the effect of message delay jitter and enhances the overall performance of FTSP in terms of error, time, and other factors.

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