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Efficient Multipath Communication for Time-Critical Applications in Underwater Acoustic Sensor Networks

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4 Author(s)
Zhong Zhou ; Comput. Sci. & Eng. Dept., Univ. of Connecticut, Storrs, CT, USA ; Zheng Peng ; Jun-Hong Cui ; Zhijie Shi

Due to the long propagation delay and high error rate of acoustic channels, it is very challenging to provide reliable data transfer for time-critical applications in an energy-efficient way. On the one hand, traditional retransmission upon failure usually introduces very large end-to-end delay and is thus not proper for time-critical services. On the other hand, common approaches without retransmission consume lots of energy. In this paper, we propose a new multipath power-control transmission (MPT) scheme, which can guarantee certain end-to-end packet error rate while achieving a good balance between the overall energy efficiency and the end-to-end packet delay. MPT smartly combines power control with multipath routing and packet combining at the destination. With carefully designed power-control strategies, MPT consumes much less energy than the conventional one-path transmission scheme without retransmission. Besides, since no hop-by-hop retransmission is allowed, MPT introduces much shorter delays than the traditional one-path scheme with retransmission. We conduct extensive simulations to evaluate the performance of MPT. Our results show that MPT is highly energy-efficient with low end-to-end packet delays.

Published in:

Networking, IEEE/ACM Transactions on  (Volume:19 ,  Issue: 1 )