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Sensors 2017, 17(10), 2374; https://doi.org/10.3390/s17102374

Data Access Based on a Guide Map of the Underwater Wireless Sensor Network

1
College of Computer Science and Technology, Harbin Engineering University, Harbin 150001, China
2
System Engineering Innovation Center, Systems Engineering Research Institute, Beijing 100094, China
3
Information Technology Centre, Beijing Foreign Studies University, Beijing 100089, China
4
Department of Electrical, Computer, Software, and Systems Engineering, Embry-Riddle Aeronautical University, Daytona Beach, FL 32114, USA
5
College of Underwater Acoustic Engineering, Harbin Engineering University, Harbin 150001, China
6
National Key Laboratory of Underwater Acoustic Science and Technology, Harbin Engineering University, Harbin 150001, China
7
Department of Computer Science, University of Houston, Houston, TX 77204, USA
*
Author to whom correspondence should be addressed.
Received: 8 August 2017 / Revised: 13 October 2017 / Accepted: 15 October 2017 / Published: 17 October 2017
(This article belongs to the Section Sensor Networks)
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Abstract

Underwater wireless sensor networks (UWSNs) represent an area of increasing research interest, as data storage, discovery, and query of UWSNs are always challenging issues. In this paper, a data access based on a guide map (DAGM) method is proposed for UWSNs. In DAGM, the metadata describes the abstracts of data content and the storage location. The center ring is composed of nodes according to the shortest average data query path in the network in order to store the metadata, and the data guide map organizes, diffuses and synchronizes the metadata in the center ring, providing the most time-saving and energy-efficient data query service for the user. For this method, firstly the data is stored in the UWSN. The storage node is determined, the data is transmitted from the sensor node (data generation source) to the storage node, and the metadata is generated for it. Then, the metadata is sent to the center ring node that is the nearest to the storage node and the data guide map organizes the metadata, diffusing and synchronizing it to the other center ring nodes. Finally, when there is query data in any user node, the data guide map will select a center ring node nearest to the user to process the query sentence, and based on the shortest transmission delay and lowest energy consumption, data transmission routing is generated according to the storage location abstract in the metadata. Hence, specific application data transmission from the storage node to the user is completed. The simulation results demonstrate that DAGM has advantages with respect to data access time and network energy consumption. View Full-Text
Keywords: underwater wireless sensor networks; data access; data guide map; metadata; center ring underwater wireless sensor networks; data access; data guide map; metadata; center ring
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Wei, Z.; Song, M.; Yin, G.; Song, H.; Wang, H.; Ma, X.; Cheng, A.M.K. Data Access Based on a Guide Map of the Underwater Wireless Sensor Network. Sensors 2017, 17, 2374.

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