Abstract
Many organizations and research working groups, including among others IEEE, ITU, ETSI and IMO are currently working towards improvements in communication of different types of vehicles (cars, trains, planes and vessels) and upgrading utilities and services offered to their crews and passengers travelling all over the world. The paper deals with selected aspects of the TCP protocol connectivity in maritime wireless networks. The authors show results of measurements performed in a real-world maritime environment consisting of on- and off-shore devices and transmission systems, partly located on vessels. Based on the collected measurements, the authors provide statistical analysis, including connectivity periods and connectivity gaps observed as a result of vessels motions. The obtained statistical results were used, in turn, in a simulation test-bed to verify efficiency of TCP connections, assuming the use of Reno algorithm, together with F-RTO enhancement (Forward RTO-Recovery), Cubic algorithm, and further adjustments proposed by the authors. The results show significant increase of the average throughput (up to 3 times) and decrease of the average download time (up to 53%), as compared to the pure Reno TCP solution. The proposed modifications seem to be especially important and attractive for highly unreliable wireless links - expected to be very common in a maritime environment.
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Acknowledgement
This work has been partially supported by the Applied Research Program under the Grant: ID PBS3/A3/20/2015, founded by the National Center for Research and Development.
The infrastructure was supported by “PL-LAB2020” project, contract POIG.02.03.01-00-104/13-00 and “Future Internet Engineering” project, contract POIG.01.01.02-00-045/09-00.
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Hoeft, M., Wozniak, J. (2017). Evaluation of Connectivity Gaps Impact on TCP Transmissions in Maritime Communications. In: Gaj, P., Kwiecień, A., Sawicki, M. (eds) Computer Networks. CN 2017. Communications in Computer and Information Science, vol 718. Springer, Cham. https://doi.org/10.1007/978-3-319-59767-6_8
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DOI: https://doi.org/10.1007/978-3-319-59767-6_8
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