Publication detail

Ethernet Bridge for FSO Links

KUBÍČEK, M. KOLKA, Z.

Original Title

Ethernet Bridge for FSO Links

English Title

Ethernet Bridge for FSO Links

Type

conference paper

Language

en

Original Abstract

The paper deals with a bridge for atmospheric Free-Space Optical links. The atmospheric turbulence causes fades whose duration is typically in the order of tens of milliseconds, which results in the loss of hundreds or thousands of packets. The loss is misinterpreted by the TCP protocol as network congestion and leads to throttling the sender transmission data rate to a fraction of real channel capacity. The proposed Ethernet-to-FSO bridge uses ARQ procedures on the FSO channel to mitigate the packet loss on the link layer. The bridge is based on Xilinx Virtex-5 FPGA with additional memory for buffers. A special link protocol for the FSO path has been designed. FSO frames can carry complete Ethernet frames without fragmentation.

English abstract

The paper deals with a bridge for atmospheric Free-Space Optical links. The atmospheric turbulence causes fades whose duration is typically in the order of tens of milliseconds, which results in the loss of hundreds or thousands of packets. The loss is misinterpreted by the TCP protocol as network congestion and leads to throttling the sender transmission data rate to a fraction of real channel capacity. The proposed Ethernet-to-FSO bridge uses ARQ procedures on the FSO channel to mitigate the packet loss on the link layer. The bridge is based on Xilinx Virtex-5 FPGA with additional memory for buffers. A special link protocol for the FSO path has been designed. FSO frames can carry complete Ethernet frames without fragmentation.

Keywords

Free-Space optics, atmospheric turbulence, TCP, ARQ, Ethernet.

RIV year

2009

Released

22.04.2009

Publisher

Department of Radio Electronics, Brno University of Technology

Location

Bratislava, Slovensko

ISBN

978-80-214-3865-1

Book

Proceedings of 19th International Conference Radioelektronika 2009

Pages from

223

Pages to

226

Pages count

4

BibTex


@inproceedings{BUT33234,
  author="Michal {Kubíček} and Zdeněk {Kolka}",
  title="Ethernet Bridge for FSO Links",
  annote="The paper deals with a bridge for atmospheric Free-Space Optical links. The atmospheric turbulence causes fades whose duration is typically in the order of tens of milliseconds, which results in the loss of hundreds or thousands of packets. The loss is misinterpreted by the TCP protocol as network congestion and leads to throttling the sender transmission data rate to a fraction of real channel capacity. The proposed Ethernet-to-FSO bridge uses ARQ procedures on the FSO channel to mitigate the packet loss on the link layer. The bridge is based on Xilinx Virtex-5 FPGA with additional memory for buffers. A special link protocol for the FSO path has been designed. FSO frames can carry complete Ethernet frames without fragmentation.",
  address="Department of Radio Electronics, Brno University of Technology",
  booktitle="Proceedings of 19th International Conference Radioelektronika 2009",
  chapter="33234",
  howpublished="electronic, physical medium",
  institution="Department of Radio Electronics, Brno University of Technology",
  year="2009",
  month="april",
  pages="223--226",
  publisher="Department of Radio Electronics, Brno University of Technology",
  type="conference paper"
}