SDN Control of Sliceable Multidimensional (Spectral and Spatial) Transceivers with YANG/NETCONF

Abstract

The combination of Spatial Division Multiplexing (SDM) with flexi-grid WDM enables optical transceivers to provide super-channels exploiting both spectral and spatial dimensions. In this paper we extend the SDM-WDM transceivers to support sliceability for the first time, and make an effective use of spatial and spectral resources. The proposed architecture provides multiple independent spectral-spatial super-channels (i.e., slices) sharing the same transceiver and exploiting different spectrum/core/ mode resources. The proposed architecture also enables to monitor the BER of the provisioned slices in order to detect any signal quality degradation due to the provisioning of additional slices. On the other hand, there is a general trend towards the disaggregation of the optical networks. In this paper we also propose the first open API based on YANG data model and NETCONF protocol for SDN-enabled sliceable SDM-WDM transceivers. The proposed transceiver is experimentally validated in a joint testbed between CTTC and KDDI research.

OpenConfig and OpenROADM Automation of Operational Modes in Disaggregated Optical Networks

“…The OpenConfig working group has been established by the main network operators with the target to enable a standard SDN control and management plane for the optical infrastructure by defining a standard set of data models to represent the optical devices in a vendor-neutral way [10]. Specifically, for the optical transponders, a set of YANG models have been designed to enable both the configuration and the monitoring of the main transponders parameters utilizing the well-established NETCONF protocol [8], [9]. fined for optical transponders.…”

“…provided by the OLS Vendor or a third party company, which has to configure all transponders in a vendor agnostic way. To this purpose, the OpenConfig YANG model has been introduced to provide a standard way to configure, through NETCONF, the common transponder parameters [8], [9].…”

SDN/NFV Control and Orchestration for SDM Networks

“…We have developed a YANG data model for the capability functionalities (sliceable-transceiver-sdmcapabilities.yang) and another for the connectivity functionalities (sliceable-transceiver-sdm-connectivity.yang) of the transceivers in [3]. The capability YANG module encompasses a list of available cores and a list of available BVTs for each S-ST. Each core is composed of a core ID and a list of available modes.…”

Network control and orchestration in SDM and WDM optical networks

“…The considered SDN control system relies on a hierarchical control architecture with a Transport SDN orchestrator (acting as a parent controller) and multiple OLS controllers (acting as child controllers) as well as transponder (TP) agents, one for each transponder, as depicted in Fig.1.b. The purpose of the TP agent is to provide a common API to the Transport SDN orchestrator for the configuration and monitoring of the WDM and SDM super-channels.In [3], we presented and experimentally validated the first SDN-enabled sliceable spatial-spectral transceiver architecture to support SDM and WDM super-channels controlled with YANG/NETCONF. Each WDM/SDM OLS domain is controlled by an OLS controller, as shown in Fig.1.b.…”