Journal
IEEE SENSORS JOURNAL
Volume 16, Issue 19, Pages 7194-7203Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2016.2591823
Keywords
Clock synchronization; maximum-likelihood estimation; molecular communication; bionanosensor networks
Funding
- National Science Foundation, China [61502295]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars through the State Education Ministry
- Shanghai Sailing Program through the Science and Technology Commission of Shanghai Municipality [14YF1408700]
- College and University Young Teachers' Training Program through the Shanghai Municipal Education Commission
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The recent advancements in nanotechnology, electronic technology, and biology enable bio-inspired nanosensors. Bionanosensor networks, which are composed of nanoscale devices, are envisioned to apply to a great number of potential applications. Clock synchronization is essential to establish a distributed cooperation among the bionanosensors. This paper investigates the clock synchronization issue among the bionanosensors in the presence of Gaussian propagation delay for their molecular communication mechanism. A two-way message exchange mechanism is proposed. The closed-form expressions of maximum-likelihood estimators for the clock offset and the clock skew are derived. The convergence and the Cramer-Rao lower bound of the estimators are analytically analyzed. Simulation results further demonstrate the effectiveness of the proposed estimators. This paper lays a foundation for the complex cooperation of nanomachines in the bionanosensor networks.
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