D2.1 - Requirements analysis of technology enablers for the flexi-grid optical path-packet infrastructure for Ethernet transport

Executive Summary: 

This document contains the work of WP2 of the STRAUSS project regarding the requirement analysis of technology enablers for the flexi-grid optical path-packet infrastructure for Ethernet transport.

The STRAUSS architecture considers two different switching technologies. These technologies are flexi-grid optical circuit switching (OCS) and optical packet switching (OPS). For both technologies the main technological as well as the operator requirements are described.

For the flexi-grid OCS one key component is the software-defined and bandwidth-variable transceiver. Different transceiver designs based on single-carrier technologies and multicarrier technologies, such as the orthogonal frequency division multiplexing (OFDM) and discrete multi-tone (DMT), are considered here. Another key component is the node for the flexi-grid OCS, which is also depicted.

For the OPS the general approach with a new photonic layer is specified. The key concept of this photonic layer is to simplify the Ethernet bridging or switching functions as much as possible, by exploiting the inherent nature of photonics and optics such as its high speed, abundant bandwidth, and all-optical processing capability. The intention is to create a new photonic-native data transport protocol, not necessarily emulating the conventional Ethernet protocol, while retaining the interface with the existing protocols at the edges. It is based on fixed length packets with a variable payload.

Finally a possible solution for the interface between the OPS and OCS network is shown. The OPS/OCS interface is based on a ultra-high performance optoelectronics platform of field programmable gate arrays (FPGAs). It will encapsulate the Ethernet packets to the OCS network with grooming and aggregation functions.

Beside the requirements some experimental results for specific transceiver solutions are reported.

 

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