RT Journal Article T1 Transport-layer limitations for NFV orchestration in resource-constrained aerial networks A1 González Blázquez, Luis Félix A1 Vidal Fernández, Iván A1 Valera Pintor, Francisco A1 Nogales Dorado, Borja A1 Sánchez Agüero, Víctor A1 López, Diego AB In this paper, we identify the main challenges and problems related with the management and orchestration of Virtualized Network Functions (VNFs) over aerial networks built with Small Unmanned Aerial Vehicles (SUAVs). Our analysis starts from a reference scenario, where several SUAVs are deployed over a delimited geographic area, and provide a mobile cloud environment that supports the deployment of functions and services using Network Functions Virtualization (NFV) technologies. After analyzing the main challenges to NFV orchestration in this reference scenario from a theoretical perspective, we undertake the study of one specific but relevant aspect following a practical perspective, i.e., the limitations of existing transport-layer solutions to support the dissemination of NFV management and orchestration information in the considered scenario. While in traditional cloud computing environments this traffic is delivered using TCP, our simulation results suggest that using this protocol over an aerial network of SUAVs presents certain limitations. Finally, based on the lessons learned from our practical analysis, the paper outlines different alternatives that could be followed to address these challenges. PB MDPI SN 1424-8220 YR 2019 FD 2019-11-28 LK https://hdl.handle.net/10016/30737 UL https://hdl.handle.net/10016/30737 LA eng NO This article has been partially supported by the European H2020 5GRANGE project (grant agreement 777137), and by the 5GCity project (TEC2016-76795- C6-3-R) funded by the Spanish Ministry of Economy and Competitiveness. DS e-Archivo RD 27 jul. 2024