Time-of-Flight Aware Time Synchronization for Wireless Embedded Systems
نویسندگان
چکیده
Accurate time synchronization is an important prerequisite for many applications. Synchronization down to submicrosecond precision, as required by distributed control in automation or network event analysis, is prevalently a domain of wired or expensive GPS-enabled systems. Existing time synchronization protocols for wireless embedded systems exhibit errors that are orders of magnitude higher. We identify propagation delay compensation as a key requirement to achieve sub-microsecond precision in typical deployments. As a result, we present the Time-of-Flight Aware Time Synchronization Protocol (TATS), a new protocol that combines fast multi-hop flooding and message delay compensation at similar message cost as existing delay-unaware protocols. Experiments conducted in a public testbed of 31 nodes show that TATS achieves sub-microsecond synchronization error over 22 hops, while outperforming state-ofthe-art protocols by a factor of up to 6.9.
منابع مشابه
Context-aware Modeling for Spatio-temporal Data Transmitted from a Wireless Body Sensor Network
Context-aware systems must be interoperable and work across different platforms at any time and in any place. Context data collected from wireless body area networks (WBAN) may be heterogeneous and imperfect, which makes their design and implementation difficult. In this research, we introduce a model which takes the dynamic nature of a context-aware system into consideration. This model is con...
متن کاملFinite Time Mix Synchronization of Delay Fractional-Order Chaotic Systems
Chaos synchronization of coupled fractional order differential equation is receiving increasing attention because of its potential applications in secure communications and control processing. The aim of this paper is synchronization between two identical or different delay fractional-order chaotic systems in finite time. At first, the predictor-corrector method is used to obtain the solutions ...
متن کاملSynchronization for Complex Dynamic Networks with State and Coupling Time-Delays
This paper is concerned with the problem of synchronization for complex dynamic networks with state and coupling time-delays. Therefore, larger class and more complicated complex dynamic networks can be considered for the synchronization problem. Based on the Lyapunov-Krasovskii functional, a delay-independent criterion is obtained and formulated in the form of linear matrix inequalities (LMIs)...
متن کاملWireless embedded systems: time, location, and applications
Wireless embedded systems combine sensors and actuators with processing, storage and communication capabilities. Networks of small, low-power wireless devices, so called nodes, offer the potential to collect observations of the physical world at unprecedented fidelity and scale. Time and location are of fundamental importance in the context of wireless sensor networks. Accurate time and locatio...
متن کاملDesign of a novel congestion-aware communication mechanism for wireless NoC architecture in multicore systems
Hybrid Wireless Network-on-Chip (WNoC) architecture is emerged as a scalable communication structure to mitigate the deficits of traditional NOC architecture for the future Multi-core systems. The hybrid WNoC architecture provides energy efficient, high data rate and flexible communications for NoC architectures. In these architectures, each wireless router is shared by a set of processing core...
متن کامل