Programmable disaggregated multi-dimensional S-BVT as an enabler for high capacity optical metro networks

Abstract

To meet the requirements of 5G high capacity optical metro networks, a programmable disaggregated multi-dimensional sliceable bandwidth/bitrate variable transceiver (S-BVT) is proposed. Specifically, transceiver multi-dimensionality is presented exploiting spatial, polarization and spectral information as a solution to support network capacity and bandwidth scaling 5G requirements. Space division multiplexing is implemented by considering a 19-core multicore fiber (MCF) enabling capacity scaling with the number of cores. Whereas polarization division multiplexing (PDM) is assessed enabling 50% spectral saving by considering two orthogonal polarization components. Finally, by the implementation of multi-band transmission systems the optical bandwidth can be increased by a factor of 10, compared to a conventional C-band system. In this last two cases, the existing spectrum and network infrastructure can be reused bringing new capabilities. In particular, in this work multi-band transmission is assessed by exploiting C-band and L-band. Additionally, disaggregation is also addressed at the transceiver level in order to enhance network flexibility, avoiding vendor lock-in, while achieving efficiency and cost reduction. Disaggregation enables assembling open components, devices and sub-systems into optical infrastructures and networks. On the other hand, the adoption of the software defined networking (SDN) paradigm enables system/network programmability and reconfigurability promoting an efficient use of the multi-dimensional network resources. Therefore, in this work, we analyze and experimentally demonstrate different S-BVT advanced functionalities suitable to support stringent network requirements of 5G. These capabilities include rate/distance adaptability, programmability/configurability, disaggregation and multi-dimensionality. Different network scenarios have been considered to assess the S-BVT functionalities, enabling Tb/s optical transmission.

Enabling capacity scaling in metro networks with multi band sliceable transceiver architectures

“…After discovery of the details of the device, the SDN controller can execute the configuration of an optical channel to establish the transmission, by configuring the source and destination MB S-BVTs, as performed in our previous work. 25 The request of a new optical channel is received by the ONOS SDN controller on its NBI interfaces and it is typically submitted including a suggested path and frequency slot. The configuration process will include: i) the configuration of the optical channel by setting up the central frequency, target output power and operational mode (i.e.…”

Experimental Demonstration of Partially Disaggregated Optical Network Control Using the Physical Layer Digital Twin

“…In [24], the authors demonstrate disaggregation allowing automated optical path protection through an SDN controller. In [25], a sliceable transponder supporting spectrum and space dimensions is supplied with the implementation of an OpenConfig-based agent (i.e., the local controller of a device). Telemetry applications based on the gRPC protocol [26] have also been modeled using YANG.…”

SDN-Enabled Multi-Band S-BVT Within Disaggregated Optical Networks

“…nodes) and systems/subsystems (e.g. transceivers) can be efficiently reconfigured according to the network requirements and traffic demand [22]. MB transmission will need a sophisticated SDN platform capable to dynamically and efficiently manage the enormous available bandwidth.…”

“…In particular, the adoption of modular programmable sliceable bandwidth/bitrate variable transceivers (S-BVTs) features modularity and easy integration with open-source control software. Additionally, network CapEx and operational expenditure (OpEx) can be further reduced, while fostering disaggregation towards meeting the key requirements of future 6G networks [17], [22]. The sliceability and modularity of the transceivers are key to adapt the system to the network requirements, following a payas-you grow approach.…”