Experiments with network coding in dynamic underwater acoustic channel

Kebkal, Veronika; Кебкал, К.Г.; Kebkal, Oleksiy

doi:10.1109/ucomms.2014.7017136

“…Recently, in the field of underwater acoustic communication, demands for multiuser communication have increased for communication with multiple autonomous underwater vehicles (AUVs) or underwater acoustic communication networks. [1][2][3][4][5][6][7][8] Time reversal is an attractive solution to achieving such communication. [5][6][7][8][9][10][11] Originally, even in the case of single-user communication, time reversal is suitable for underwater acoustic communication in terms of countermeasures to intersymbol interference (ISI) due to a rich multipath environment inherent in ocean acoustic propagation.…”

Section: Introductionmentioning

confidence: 99%

At-sea experiment of adaptive time-reversal multiuser communication in the deep ocean

Shimura

¹

,

Kida

²

,

Deguchi

³

et al. 2015

Jpn. J. Appl. Phys.

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An at-sea experiment of multiuser communication in deep water using adaptive time reversal was carried out. In the experiment, two sources and a 20-channel receiver array were deployed at the range of 30 km in an area of 1500-2000 m water depth. One of the sources was moored and the other was suspended at various depths. For processing signals actually transmitted from two sources, it was demonstrated that adaptive time reversal could cancel multiuser interference independently of relative source positions. Additionally, for a more detailed investigation, the analysis of multiuser test signals by synthesizing signals from different depths was performed. As a result, especially in the case of adjacent sources, adaptive time reversal significantly suppressed crosstalk.

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“…For example, two packets of equal length can be merged by applying bitwise XOR to them. [65] shows by experiment that using network coding results in higher packet delivery to packet transmission ratio than a traditional first in, first out approach.…”

Section: B Approaches To Routingmentioning

confidence: 99%

Underwater Ad-Hoc Networks: A Review

Wengle¹,

Potter²,

Dong³

2021

Preprint

0

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Underwater sensor networks have become increasingly interesting in the past four decades. They can be used in a multitude of scenarios, commercial and military alike. Underwater networks can communicate in several ways, but when nodes are far apart, underwater acoustic communication is the only feasible way. The complex underwater acoustic channel puts high demands on the network protocols. The physical layer needs to contend with short coherence times, high intersymbol interference and significant Doppler spread. The routing protocol needs to handle intermittent connectivity and mobile network topologies, such as autonomous underwater vehicle networks. The medium access control protocol needs to manage medium access with high latency and potentially high packet loss ratios without congesting the network. The available acoustic modems are still rather expensive, which limits the size of a sensor network. Voices have also been raised from the academia for a paradigm shift, from hardware-defined, proprietary modems to software-defined, open-architecture modems, in order to accelerate research in the field and enable interoperability. This paper reviews the recent advancements in designing and implementing underwater networks on several levels and discusses some interesting approaches to underwater ad-hoc networking. The focus lies on acoustic communication.<br>

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“…There exist alternatives to routing. One of them is network coding [65], in which nodes combine incoming data packets and relay the combined packet. For example, two packets of equal length can be merged by applying bitwise XOR to them.…”

Section: B Approaches To Routingmentioning

confidence: 99%

Underwater Ad-Hoc Networks: A Review

Wengle¹,

Potter²,

Dong³

2021

Preprint

0

View full text Add to dashboard Cite

Underwater sensor networks have become increasingly interesting in the past four decades. They can be used in a multitude of scenarios, commercial and military alike. Underwater networks can communicate in several ways, but when nodes are far apart, underwater acoustic communication is the only feasible way. The complex underwater acoustic channel puts high demands on the network protocols. The physical layer needs to contend with short coherence times, high intersymbol interference and significant Doppler spread. The routing protocol needs to handle intermittent connectivity and mobile network topologies, such as autonomous underwater vehicle networks. The medium access control protocol needs to manage medium access with high latency and potentially high packet loss ratios without congesting the network. The available acoustic modems are still rather expensive, which limits the size of a sensor network. Voices have also been raised from the academia for a paradigm shift, from hardware-defined, proprietary modems to software-defined, open-architecture modems, in order to accelerate research in the field and enable interoperability. This paper reviews the recent advancements in designing and implementing underwater networks on several levels and discusses some interesting approaches to underwater ad-hoc networking. The focus lies on acoustic communication.<br>

show abstract

Experiments with network coding in dynamic underwater acoustic channel

Cited by 10 publications

References 8 publications

At-sea experiment of adaptive time-reversal multiuser communication in the deep ocean

At-sea experiment of adaptive time-reversal multiuser communication in the deep ocean

Underwater Ad-Hoc Networks: A Review

Underwater Ad-Hoc Networks: A Review

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