March 13, 2017

Optical Ethernet - Flexible Optical Metro Networks

  • Benzaoui N.
  • Buchali F.
  • Dembeck L.
  • Dischler R.
  • Franz B.
  • Gebhard U.
  • Lautenschlaeger W.
  • Leven A.
  • Milbrandt J.
  • Pointurier Y.
  • Roesener D.
  • Schmalen L.

Enhanced flexibility in optical transport networks is a key requirement to support dynamic traffic load in packet based networks. Today, flexibility is reached by packet switches connected by static point-to-point transport connections. Wide-stretched synchronization patterns, line coding schemes, and Forward Error Correction frames (FEC) prohibit flexibility right in the transport. We introduce a new optical transport concept that combines packet aggregation with a multipoint-to-point line coding and FEC processing. This way we avoid the quadratic full mesh scalability problem of other aggregated switching technologies like e.g. wavelength switching. Based on the new transport concept we build an Optical Ethernet bus with the flexibility of a distributed Ethernet switch and the performance of leading edge optical transport.

View Original Article

Recent Publications

March 23, 2017

Performance Comparison of Capacity-Achieving Modulation Formats for Transoceanic Optical Systems

  • Fernandez De Jauregui Ruiz I.
  • Ghazisaeidi A.
  • Tran P.

We experimentally compare the performance of geometrically-shaped (64APSK) and probabilistically-shaped 64QAM (PS64QAM) formats considering linear and nonlinear penalties.

March 20, 2017

LWIP and Wi-Fi Boost Link Management

  • K S.
  • Kim B.
  • Ling J.
  • Lopez-Perez D.
  • Ming Ding
  • Vasudevan S.

3GPP LWIP Release 13 technology and its prestandard version Wi-Fi Boost have recently emerged as an efficient LTE and Wi-Fi integration at the IP layer, allowing uplink on LTE and downlink on Wi-Fi. This solves all the contention problems of Wi-Fi and allows an optimum usage of the unlicensed band ...

March 13, 2017

Advanced C+L-Band Transoceanic Transmission Systems Based on Probabilistically-Shaped PDM-64QAM

  • Brindel P.
  • Buchali F.
  • Carbo Meseguer A.
  • Charlet G.
  • Fernandez I.
  • Ghazisaeidi A.
  • Hu Q.
  • Renaudier J.
  • Rios-Muller R.
  • Schmalen L.
  • Tran P.

We review the most recent, advanced concepts and methods employed in the cutting-edge spectrally-efficient coherent fiber-optic transoceanic transmission systems, such as probabilistic shaping, adaptive digital nonlinear compensation, rate-adaptive spatially-coupled low density parity check codes, and dual-band C+L-band transmission. Building upon all these concepts and methods, we demonstrate transmission of 179 ...