Issue No. 04 - April (2014 vol. 13)
Youngtae Noh , Cisco Syst. Inc., Milpitas, CA, USA
Uichin Lee , Dept. of Knowledge Service Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
Seongwon Han , Dept. of Comput. Sci., Univ. of California, Los Angeles, Los Angeles, CA, USA
Dustin Torres , Intel Corp., Santa Clara, CA, USA
Jinwhan Kim , Div. of Ocean Syst. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
Mario Gerla , Dept. of Comput. Sci., Univ. of California, Los Angeles, Los Angeles, CA, USA
Mobile underwater networks with acoustic communications are confronted with several unique challenges such as long propagation delays, high transmission power consumption, and node mobility. In particular, slow signal propagation permits multiple packets to concurrently travel in the underwater channel, which must be exploited to improve the overall throughput. To this end, we propose the delay-aware opportunistic transmission scheduling (DOTS) protocol that uses passively obtained local information (i.e., neighboring nodes' propagation delay map and their expected transmission schedules) to increase the chances of concurrent transmissions while reducing the likelihood of collisions. Our extensive simulation results document that DOTS outperforms existing solutions and provides fair medium access even with node mobility.
Protocols, Mobile communication, Mobile computing, US Department of Transportation, Propagation delay, Sensors, Synchronization
Youngtae Noh et al., "DOTS: A Propagation Delay-Aware Opportunistic MAC Protocol for Mobile Underwater Networks," in IEEE Transactions on Mobile Computing, vol. 13, no. 4, pp. 766-782, 2014.