{"department":[{"_id":"75"}],"_id":"2481","title":" Scaling and Placing Bidirectional Services with Stateful Virtual and Physical Network Functions","citation":{"chicago":"Dräxler, Sevil, Stefan Balthasar Schneider, and Holger Karl. “ Scaling and Placing Bidirectional Services with Stateful Virtual and Physical Network Functions.” In <i>4th IEEE International Conference on Network Softwarization (NetSoft 2018)</i>, 123--131. IEEE, 2018.","apa":"Dräxler, S., Schneider, S. B., &#38; Karl, H. (2018).  Scaling and Placing Bidirectional Services with Stateful Virtual and Physical Network Functions. In <i>4th IEEE International Conference on Network Softwarization (NetSoft 2018)</i> (pp. 123--131). Montreal: IEEE.","short":"S. Dräxler, S.B. Schneider, H. Karl, in: 4th IEEE International Conference on Network Softwarization (NetSoft 2018), IEEE, 2018, pp. 123--131.","ieee":"S. Dräxler, S. B. Schneider, and H. Karl, “ Scaling and Placing Bidirectional Services with Stateful Virtual and Physical Network Functions,” in <i>4th IEEE International Conference on Network Softwarization (NetSoft 2018)</i>, Montreal, 2018, pp. 123--131.","mla":"Dräxler, Sevil, et al. “ Scaling and Placing Bidirectional Services with Stateful Virtual and Physical Network Functions.” <i>4th IEEE International Conference on Network Softwarization (NetSoft 2018)</i>, IEEE, 2018, pp. 123--131.","ama":"Dräxler S, Schneider SB, Karl H.  Scaling and Placing Bidirectional Services with Stateful Virtual and Physical Network Functions. In: <i>4th IEEE International Conference on Network Softwarization (NetSoft 2018)</i>. IEEE; 2018:123--131.","bibtex":"@inproceedings{Dräxler_Schneider_Karl_2018, title={ Scaling and Placing Bidirectional Services with Stateful Virtual and Physical Network Functions}, booktitle={4th IEEE International Conference on Network Softwarization (NetSoft 2018)}, publisher={IEEE}, author={Dräxler, Sevil and Schneider, Stefan Balthasar and Karl, Holger}, year={2018}, pages={123--131} }"},"user_id":"477","year":"2018","status":"public","publisher":"IEEE","author":[{"first_name":"Sevil","id":"31764","last_name":"Dräxler","full_name":"Dräxler, Sevil"},{"first_name":"Stefan Balthasar","orcid":"0000-0001-8210-4011","last_name":"Schneider","id":"35343","full_name":"Schneider, Stefan Balthasar"},{"full_name":"Karl, Holger","last_name":"Karl","id":"126","first_name":"Holger"}],"conference":{"location":"Montreal","name":"4th IEEE International Conference on Network Softwarization (NetSoft 2018)"},"publication":"4th IEEE International Conference on Network Softwarization (NetSoft 2018)","type":"conference","date_updated":"2022-01-06T06:56:38Z","language":[{"iso":"eng"}],"urn":"24814","file_date_updated":"2018-06-25T07:40:57Z","date_created":"2018-04-24T12:14:00Z","has_accepted_license":"1","project":[{"name":"5G Development and validation platform for global industry-specific network services and Apps","_id":"28","grant_number":"761493"},{"_id":"1","name":"SFB 901"},{"_id":"4","name":"SFB 901 - Project Area C"},{"_id":"16","name":"SFB 901 - Subproject C4"}],"oa":"1","abstract":[{"text":"Network function virtualization requires scaling and placement, deciding the number and the location of function instances. Current approaches are limited in flexibility and practical applicability. Specifically, we study dynamic, single-step, joint scaling and placement of network services with bidirectional flows traversing Physical or Virtual Network Functions (VNFs) and returning to their sources. We develop models to support stateful components and legacy network functions with fixed locations in these network services as well as the possibility of reusing VNFs across network services. We formalize the problem of jointly scaling and placing such network services as a mixed- integer linear program (MILP). We show that this problem is NP-complete and also present a heuristic algorithm to find good solutions in short time. In an extensive evaluation with realistic scenarios, we investigate the capabilities of the two approaches.","lang":"eng"}],"page":"123--131","file":[{"file_id":"3319","file_name":"RIS.pdf","access_level":"open_access","content_type":"application/pdf","relation":"main_file","date_created":"2018-06-25T07:40:57Z","date_updated":"2018-06-25T07:40:57Z","file_size":1471937,"creator":"sevilmeh"}],"ddc":["040"],"publication_status":"published"}