Open AccessAchieving Relative Time Synchronization in Wireless Sensor Networks
Author(s) -
Salman Ahmed,
Feng Xiao,
Tongwen Chen
Publication year - 2013
Publication title -
journal of control science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.208
H-Index - 18
eISSN - 1687-5257
pISSN - 1687-5249
DOI - 10.1155/2013/538181
Subject(s) - wireless sensor network , synchronization (alternating current) , computer science , distributed computing , time synchronization , discrete time and continuous time , topology (electrical circuits) , convergence (economics) , key distribution in wireless sensor networks , network topology , real time computing , protocol (science) , wireless , graph , computer network , wireless network , engineering , theoretical computer science , mathematics , telecommunications , channel (broadcasting) , medicine , statistics , alternative medicine , pathology , economic growth , electrical engineering , economics
Time synchronization is required for a variety of distributed control applications in wireless sensor networks (WSNs). In this paper, a novel distributed time synchronization technique for WSNs is presented. The proposed technique does not require all the sensor nodes to have the same time periods or starting times. Furthermore, the communication topology of the WSN is not assumed to be static; it can change with time. The WSN is modeled by a time-varying discrete-time system. The objective is to design local control inputs to achieve relative time synchronization by using the neighbor sensor nodes information. By employing tools from nonnegative matrix and graph theories, the convergence analysis is presented. Numerical examples are presented to demonstrate the effectiveness of the proposed protocol
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