Distributed Clock Parameters Tracking in Wireless Sensor Network

Clock Synchronization in Wireless Sensor Networks: A New Model and Analysis Approach Based on Networked Control Perspective

“…The model is easy to expand the network size, is robust to changes in network connectivity, and can maintain long-term precision of clock parameters. The state space model established above and the state space model of [14] have similar form, but there are still some differences. (1) In this paper, the state vector is a matrix form about the clock offset and fixed delay and in [14] about the clock skew and accumulated clock offset; (2) in this paper, the measurement model directly considers the clock skew and in [14] the localized timestamp measurement model considers the relationship between the timestamps and the accumulated clock offset; (3) in the paper, we have lots of research work to be done for extending the state model and in [14] the model has be extended to multiple nodes.…”

“…In addition, the latest researches developed a distributed algorithm which is easy to expand the network size. Reference [14] modeled the clock synchronization problem as a state space model and presented a distributed Kalman filter algorithm for the clock parameters of the entire network node tracking (the clock skew and clock skew). The model is easy to expand 2 Mathematical Problems in Engineering the network size, is robust to changes in network connectivity, and can maintain long-term precision of clock parameters.…”

“…Comparing the above control theory models, it is found that the clock synchronization issue can be modeled as a state space model. Reference [14] also modeled the clock synchronization problem as a state space model, presented a distributed Kalman filter algorithm for the clock parameters of the entire network node tracking. It also verifies that modeling the clock synchronization problem as a state space model is feasible, even has the incomparable advantage that it's easy to expand to the distributed structure, over traditional estimation of the clock parameters.…”

“…It also verifies that modeling the clock synchronization problem as a state space model is feasible, even has the incomparable advantage that it's easy to expand to the distributed structure, over traditional estimation of the clock parameters. Differing from the view of research in [14], this paper, by using the clock relationships based on two-way message exchange mechanism, establishes a clock synchronization state space model, trying to analyze the clock synchronization issue from the perspective of the control theory.…”

Homomorphic Filtering for Improving Time Synchronization in Wireless Networks

“…Nevertheless, other mechanisms with better accuracy under certain situations are necessary to achieve real-time performance, such as the pseudo-synchronous algorithm [10], PISync [11] or the distributed synchronization algorithms proposed by Luo et al [12] and Du et al [13], among others proposals.…”