TY - CONF AB - As 5G and network function virtualization (NFV) are maturing, it becomes crucial to demonstrate their feasibility and benefits by means of vertical scenarios. While 5GPPP has identified smart manufacturing as one of the most important vertical industries, there is still a lack of specific, practical use cases. Using the experience from a large-scale manufacturing company, Weidm{\"u}ller Group, we present a detailed use case that reflects the needs of real-world manufacturers. We also propose an architecture with specific network services and virtual network functions (VNFs) that realize the use case in practice. As a proof of concept, we implement the required services and deploy them on an emulation-based prototyping platform. Our experimental results indicate that a fully virtualized smart manufacturing use case is not only feasible but also reduces machine interconnection and configuration time and thus improves productivity by orders of magnitude. AU - Schneider, Stefan Balthasar AU - Peuster, Manuel AU - Behnke, Daniel AU - Marcel, Müller AU - Bök, Patrick-Benjamin AU - Karl, Holger ID - 9270 KW - 5g KW - vertical KW - smart manufacturing KW - nfv T2 - European Conference on Networks and Communications (EuCNC) TI - Putting 5G into Production: Realizing a Smart Manufacturing Vertical Scenario ER - TY - JOUR AB - The ongoing softwarization of networks creates a big need for automated testing solutions to ensure service quality. This becomes even more important if agile environments with short time to market and high demands, in terms of service performance and availability, are considered. In this paper, we introduce a novel testing solution for virtualized, microservice-based network functions and services, which we base on TTCN-3, a well known testing language defined by the European standards institute (ETSI). We use TTCN-3 not only for functional testing but also answer the question whether TTCN-3 can be used for performance profiling tasks as well. Finally, we demonstrate the proposed concepts and solutions in a case study using our open-source prototype to test and profile a chained network service. AU - Peuster, Manuel AU - Dröge, Christian AU - Boos, Clemens AU - Karl, Holger ID - 8113 JF - ICT Express SN - 2405-9595 TI - Joint testing and profiling of microservice-based network services using TTCN-3 ER - TY - CONF AU - Dräxler, Sevil AU - Karl, Holger ID - 8240 T2 - 5th IEEE International Conference on Network Softwarization (NetSoft) 2019 TI - SPRING: Scaling, Placement, and Routing of Heterogeneous Services with Flexible Structures ER - TY - CONF AB - 5G together with software defined networking (SDN) and network function virtualisation (NFV) will enable a wide variety of vertical use cases. One of them is the smart man- ufacturing case which utilises 5G networks to interconnect production machines, machine parks, and factory sites to enable new possibilities in terms of flexibility, automation, and novel applications (industry 4.0). However, the availability of realistic and practical proof-of-concepts for those smart manufacturing scenarios is still limited. This demo fills this gap by not only showing a real-world smart manufacturing application entirely implemented using NFV concepts, but also a lightweight prototyping framework that simplifies the realisation of vertical NFV proof-of-concepts. Dur- ing the demo, we show how an NFV-based smart manufacturing scenario can be specified, on-boarded, and instantiated before we demonstrate how the presented NFV services simplify machine data collection, aggregation, and analysis. AU - Peuster, Manuel AU - Schneider, Stefan Balthasar AU - Behnke, Daniel AU - Müller, Marcel AU - Bök, Patrick-Benjamin AU - Karl, Holger ID - 8792 T2 - 5th IEEE International Conference on Network Softwarization (NetSoft 2019) TI - Prototyping and Demonstrating 5G Verticals: The Smart Manufacturing Case ER - TY - JOUR AB - Softwarized networks are the key enabler for elastic, on-demand service deployments of virtualized network functions. They allow to dynamically steer traffic through the network when new network functions are instantiated, or old ones are terminated. These scenarios become in particular challenging when stateful functions are involved, necessitating state management solutions to migrate state between the functions. The problem with existing solutions is that they typically embrace state migration and flow rerouting jointly, imposing a huge set of requirements on the on-boarded virtualized network functions (VNFs), eg, solution-specific state management interfaces. To change this, we introduce the seamless handover protocol (SHarP). An easy-to-use, loss-less, and order-preserving flow rerouting mechanism that is not fixed to a single state management approach. Using SHarP, VNF vendors are empowered to implement or use the state management solution of their choice. SHarP supports these solutions with additional information when flows are migrated. In this paper, we present SHarP's design, its open source prototype implementation, and show how SHarP significantly reduces the buffer usage at a central (SDN) controller, which is a typical bottleneck in state-of-the-art solutions. Our experiments show that SHarP uses a constant amount of controller buffer, irrespective of the time taken to migrate the VNF state. AU - Peuster, Manuel AU - Küttner, Hannes AU - Karl, Holger ID - 8795 JF - International Journal of Network Management SN - 1055-7148 TI - A flow handover protocol to support state migration in softwarized networks ER - TY - JOUR AU - Soenen, Thomas AU - Tavernier, Wouter AU - Peuster, Manuel AU - Vicens, Felipe AU - Xilouris, George AU - Kolometsos, Stavros AU - Kourtis, Michail-Alexandros AU - Colle, Didier ID - 9823 JF - IEEE Communications Magazine SN - 0163-6804 TI - Empowering Network Service Developers: Enhanced NFV DevOps and Programmable MANO ER - TY - JOUR AU - Peuster, Manuel AU - Schneider, Stefan Balthasar AU - Zhao, Mengxuan AU - Xilouris, George AU - Trakadas, Panagiotis AU - Vicens, Felipe AU - Tavernier, Wouter AU - Soenen, Thomas AU - Vilalta, Ricard AU - Andreou, George AU - Kyriazis, Dimosthenis AU - Karl, Holger ID - 9824 JF - IEEE Communications Magazine SN - 0163-6804 TI - Introducing Automated Verification and Validation for Virtualized Network Functions and Services ER - TY - CONF AU - Afifi, Haitham AU - Karl, Holger ID - 6860 T2 - 2019 16th IEEE Annual Consumer Communications & Networking Conference (CCNC2019) TI - Power Allocation with a Wireless Multi-cast Aware Routing for Virtual Network Embedding ER - TY - CONF AB - By distributing the computational load over the nodes of a Wireless Acoustic Sensor Network (WASN), the real-time capability of the TRINICON (TRIple-N-Independent component analysis for CONvolutive mixtures) framework for Blind Source Separation (BSS) can be ensured, even if the individual network nodes are not powerful enough to run TRINICON in real-time by themselves. To optimally utilize the limited computing power and data rate in WASNs, the MARVELO (Multicast-Aware Routing for Virtual network Embedding with Loops in Overlays) framework is expanded for use with TRINICON, while a feature-based selection scheme is proposed to exploit the most beneficial parts of the input signal for adapting the demixing system. The simulation results of realistic scenarios show only a minor degradation of the separation performance even in heavily resource-limited situations. AU - Guenther, Michael AU - Afifi, Haitham AU - Brendel, Andreas AU - Karl, Holger AU - Kellermann, Walter ID - 12880 T2 - 2019 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA) (WASPAA 2019) TI - Sparse Adaptation of Distributed Blind Source Separation in Acoustic Sensor Networks ER - TY - CONF AB - Internet of Things (IoT) applications witness an exceptional evolution of traffic demands, while existing protocols, as seen in wireless sensor networks (WSNs), struggle to cope with these demands. Traditional protocols rely on finding a routing path between sensors generating data and sinks acting as gateway or databases. Meanwhile, the network will suffer from high collisions in case of high data rates. In this context, in-network processing solutions are used to leverage the wireless nodes' computations, by distributing processing tasks on the nodes along the routing path. Although in-network processing solutions are very popular in wired networks (e.g., data centers and wide area networks), there are many challenges to adopt these solutions in wireless networks, due to the interference problem. In this paper, we solve the problem of routing and task distribution jointly using a greedy Virtual Network Embedding (VNE) algorithm, and consider power control as well. Through simulations, we compare the proposed algorithm to optimal solutions and show that it achieves good results in terms of delay. Moreover, we discuss its sub-optimality by driving tight lower bounds and loose upper bounds. We also compare our solution with another wireless VNE solution to show the trade-off between delay and symbol error rate. AU - Afifi, Haitham AU - Karl, Holger ID - 12881 T2 - 2019 12th IFIP Wireless and Mobile Networking Conference (WMNC) (WMNC'19) TI - An Approximate Power Control Algorithm for a Multi-Cast Wireless Virtual Network Embedding ER -