Conference paper Closed Access

Experimental Evaluation of Hierarchical Control over Multi-Domain Wireless/Optical Networks

Mangues-Bafalluy, Josep; Núñez-Martínez, José; Casellas, Ramon; Mayoral, Arturo; Baranda, Jorge; Salvat, Josep X.; García-Saavedra, Andrés; Vilalta, Ricard; Pascual, Iñaki; Li, Xi; Martínez, Ricard; Muñoz, Raül

5G-Crosshaul aims at reducing network costs by designing an integrated transport (fronthaul/backhaul) network able to fulfill 5G requirements. One of the main issues is that these transport networks will consist of heterogeneous technologies that need end-to-end orchestration. In this paper, we propose and evaluate a hierarchical controller for wireless/optical resources as seen from a resource management application (RMA). More specifically, we deploy a hierarchical 5G-Crosshaul Control Infrastructure (XCI) where child controllers deal with the specificities of each technology whilst the parent controller is in charge of offering RMA the appropriate abstraction level and an end-to-end view. To eventually understand the end-to-end behavior related with service setup, we evaluate each network segment (wireless and optical), each plane (application and control planes), and each layer of the hierarchy inside the XCI. In particular, we evaluate the aggregated path setup time (in the order of seconds) as well as the magnitude of each component (wireless domain contributes with tens of ms and multi-layer optical network with hundreds of ms per layer for a total in the order of seconds). Path restoration results reveal the importance of leveraging control of child controllers when requiring fast response to unexpected data plane events, since an important part of the setup delay observed is due to the RMA-parent-child controller interaction and sequential message handling.

Grant numbers : Project partially funded by grants 5GNORM (TEC2014-60491-R) and DESTELLO (TEC2015- 69256-R).
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