Cost-effective data plane solutions based on OFDM technology for flexi-grid metro networks using sliceable bandwidth variable transponders

In an evolutionary metro network scenario, it is proposed to adopt flexi-grid technologies and centralize the IP functionality, locating the Broadband Remote Access Servers (BRASes) in fewer sites of a regional photonic mesh network, in order to reduce CapEx. Therefore, cost-effective data plane solutions, able to support multiple low bit rate connections, using 12.5 GHz channels, are required for this network segment. In this paper, we present a cost-effective bandwidth variable transponder (BVT) based on OFDM technology suitable for flexi-grid metropolitan area network (MAN), using low-complexity digital signal processing (DSP) and direct detection (DD). The design guidelines are provided for this data plane solution, which has been numerically analyzed and experimentally validated in a photonic mesh network. Furthermore, a sliceable BVT architecture is proposed for enhancing the capacity of the BRAS node in order to serve several Multi-Tenant Units (MTUs).

[1]  T. Tsuritani,et al.  Transmission of High-Speed ( ${>} 100$ Gb/s) Direct-Detection Optical OFDM Superchannel , 2012, Journal of Lightwave Technology.

[2]  Michela Svaluto Moreolo,et al.  Experimental demonstration of a cost-effective bit rate variable IM/DD optical OFDM with reduced guard band. , 2012, Optics express.

[3]  G. Junyent,et al.  Clipping and quantization noise mitigation in intensity-modulated direct detection O-OFDM systems based on the FHT , 2012, 2012 14th International Conference on Transparent Optical Networks (ICTON).

[4]  Josep M. Fabrega,et al.  Experimental Validation of an Elastic Low-Complex OFDM-Based BVT for Flexi-Grid Metro Networks , 2013 .

[5]  Masahiko Jinno,et al.  Elastic optical networking: a new dawn for the optical layer? , 2012, IEEE Communications Magazine.

[6]  Masahiko Jinno,et al.  Spectrum-efficient and scalable elastic optical path network: architecture, benefits, and enabling technologies , 2009, IEEE Communications Magazine.

[7]  A. Pattavina,et al.  On the benefits of elastic transponders in optical metro networks , 2012, OFC/NFOEC.

[8]  L. Nadal,et al.  Adaptive bit loading in FHT-based OFDM transponders for flexi-grid optical networks , 2013, 2013 15th International Conference on Transparent Optical Networks (ICTON).

[9]  Yongqi He,et al.  Comparison of DSB and SSB transmission for OFDM-PON , 2012 .

[10]  H. Takara,et al.  IP traffic offloading to elastic optical layer using multi-flow optical transponder , 2011, 2011 37th European Conference and Exhibition on Optical Communication.

[11]  Raul Muñoz,et al.  The ADRENALINE testbed: integrating GMPLS, XML, and SNMP in transparent DWDM networks , 2005, IEEE Communications Magazine.