Low-complexity time synchronization for energy-constrained wireless sensor networks: Dual-Clock delayed-message approach
| Autor: | Wen-Long William Chin, Yao-Ren Lee |
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| Rok vydání: | 2016 |
| Předmět: |
Computer Networks and Communications
Computer science 020208 electrical & electronic engineering Real-time computing 020206 networking & telecommunications 02 engineering and technology Propagation delay Clock skew Clock synchronization Flooding (computer networking) Key distribution in wireless sensor networks 0202 electrical engineering electronic engineering information engineering Data synchronization Self-clocking signal Wireless sensor network Software |
| Zdroj: | Peer-to-Peer Networking and Applications. 10:887-896 |
| ISSN: | 1936-6450 1936-6442 |
| DOI: | 10.1007/s12083-016-0437-4 |
| Popis: | Due to the ability of sensor nodes to collaborate, time synchronization is essential for many sensor network operations. With the aid of hardware capabilities, this work presents a novel time synchronization method, which employs a dual-clock delayed-message approach, for energy-constrained wireless sensor networks (WSNs). To conserve WSN energy, this study adopts the flooding time synchronization scheme based on one-way timing messages. Via the proposed approach, the maximum-likelihood (ML) estimation of time parameters, such as clock skew and clock offset, can be obtained for time synchronization. Additionally, with the proposed scheme, the clock skew and offset estimation problem will be transformed into a problem independent of random delay and propagation delay. The ML estimation of link propagation delay, which can be used for localization systems in the proposed scenario, is also obtained. In addition to good performance, the proposed method has low complexity. |
| Databáze: | OpenAIRE |
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