Energy efficient multi-path communication for time-critical applications in underwater sensor networks

Abstract

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-end delay, thus is 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 multi-path 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 multi-path routing and packet combining at the destination. With carefully designed power control strategies, MPT consumes much less energy than the conventional onepath transmission scheme without retransmission. Besides, since no hop-by-hop retransmission is allowed, MPT introduces much shorter delay 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.

Pressure Routing for Underwater Sensor Networks

“…We generate different channel fading conditions in the simulations by adjusting the transmission power in dB re μ Pa and SNR threshold [32]. 3 Unless otherwise mentioned, the transmission power is set to 105 dB re μ Pa. We use a transmission range of 250m, and the data rate is set to be 50Kbps as in [36]. We use the CSMA MAC protocol.…”

Cross-layer routing on MIMO-OFDM underwater acoustic links

“…In particular, an analysis is conducted that shows the strong dependence of the available bandwidth on the transmission distance, which is a peculiar characteristic of the underwater environment (see also Stojanovic [18]). Other significant recent studies consider delay-reliability tradeoff analysis (Zhang and Mitra [19]), the benefits achievable with cooperative communications (Mitra et al [20]), and multi-path routing (Zhou and Cui [21]). No previous work, to the best of our knowledge, has investigated routing over acoustic MIMO-OFDM links.…”

Distributed Medium Access Control Strategies for MIMO Underwater Acoustic Networking

“…In particular, an analysis is conducted that shows the strong dependence of the available bandwidth on the transmission distance, which is a peculiar characteristic of the underwater environment (see also Stojanovic [33]). Other significant recent studies consider delay-reliability tradeoff analysis (Zhang and Mitra [34]), the benefits achievable with cooperative communications (Mitra et al [35]), and multi-path routing (Cui [36]). …”