Whatever more than 70% of the surface of the earth is covered with the oceans, the oceans remain one of the least explored frontiers to be a treasure-house of resources. Oceans serve as the main arteries of transportation between continents, climate regulation, food supplier and natural resources retrieval such as oil and natural gas. For these reasons, we have significant interests in monitoring aquatic environments for environmental, scientific, commercial, safety, and military reasons. Recently, by researchers having a lot of studies for Underwater Acoustic Sensor Network(UW-ASN), they try to apply sensor network concept in underwater environments to utilize in field of practical use such as ocean monitoring, resource inquiry, pollution supervision and disaster prevention.

Ubiquitous Underwater acoustic sensor network (UW-ASN) is new area of ubiquitous sensor networks in underwater environments which has challenges to be overcome such in long propagation delay resulting from low speed of sound propagation, severely limited range-dependent bandwidth, attenuation and time-varying multipath propagation. All the above distinct features of Ubiquitous Underwater acoustic sensor network (UW-ASN) give birth to new challenges areas for every level of the network protocol suite.

This workshop will support an opportunity for industry and academic professionals to discuss the latest issues and progress in the area of UW-ASN. The workshop will publish high quality papers which are closely related to the various theories and practical applications in UW-ASN. Furthermore, we hope that this workshop will provide us with a good chance to share creative ideas regarding UW-ASN with other researchers and engineers from institutions around the world.

www.uuwsn.org/

1. Routing protocol based on Hex-grid in WSNs
   Youngho KIM
2. Cortex-M3 and TMS320C6416 based Acoustic modem Implementation for Underwater Wireless Communication
   DongSoo Lee
3. Integration Method between Localization and Routing in Underwater Sensor Network
   Satoshi Hirai
4. MDS-Mac: A Scheduled MAC for Localization, Time-Synchronisation and Communication in Underwater Acoustic Networks
   Wouter van Kleunen, Nirvana Meratnia, Paul J.M. Havinga
5. AHU (Aloha and Handshaking Union) : A MAC Protocol for Underwater MANETs
   Seung-Won Shin, Nam-Yeol Yun, Soo-Hyun Park, Changhwa Kim