{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,25]],"date-time":"2025-11-25T15:34:34Z","timestamp":1764084874903,"version":"build-2065373602"},"reference-count":28,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2023,6,10]],"date-time":"2023-06-10T00:00:00Z","timestamp":1686355200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The paper presents the development and verification of software and a testbed aiming to demonstrate the ability of two telecommunication network concepts\u2014Next Generation Network (NGN) and Software-Defined Networking (SDN)\u2014to cooperate. The proposed architecture includes components of the IP Multimedia Subsystem (IMS) in its service stratum and of the SDN (controller and programmable switches) in its transport stratum, providing flexible transport resource control and management via open interfaces. One important feature of the presented solution is the inclusion of ITU-T standards for NGN networks, which are not considered in other related works. The paper includes details regarding the hardware and software architecture of the proposed solution as well as results of the performed functional tests, which confirm its proper operation.<\/jats:p>","DOI":"10.3390\/s23125481","type":"journal-article","created":{"date-parts":[[2023,6,12]],"date-time":"2023-06-12T02:28:42Z","timestamp":1686536922000},"page":"5481","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Implementation of IMS\/NGN Transport Stratum Based on the SDN Concept"],"prefix":"10.3390","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2932-5610","authenticated-orcid":false,"given":"Sylwester","family":"Kaczmarek","sequence":"first","affiliation":[{"name":"Faculty of Electronics, Telecommunications and Informatics, Gda\u0144sk University of Technology, Narutowicza 11\/12, 80-233 Gda\u0144sk, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6734-3046","authenticated-orcid":false,"given":"Maciej","family":"Sac","sequence":"additional","affiliation":[{"name":"Faculty of Electronics, Telecommunications and Informatics, Gda\u0144sk University of Technology, Narutowicza 11\/12, 80-233 Gda\u0144sk, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kamil","family":"Bachorski","sequence":"additional","affiliation":[{"name":"ADVA Optical Networking, \u0141u\u017cycka 8C, 81-537 Gdynia, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,6,10]]},"reference":[{"key":"ref_1","first-page":"271","article-title":"Zastosowanie koncepcji SDN w warstwie transportowej sieci IMS\/NGN","volume":"4","author":"Bachorski","year":"2022","journal-title":"Przegl\u0105d Telekomun. + Wiadomo\u015bci Telekomun."},{"key":"ref_2","unstructured":"(2023, June 09). 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JsonCpp. Available online: https:\/\/github.com\/open-source-parsers\/jsoncpp."},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Kaczmarek, S., and Sac, M. (2021, January 23\u201325). Performance Models of a Multidomain IMS\/NGN Service Stratum. Proceedings of the 29th International Conference on Software, Telecommunications and Computer Networks, SoftCOM 2021, Hvar, Croatia.","DOI":"10.23919\/SoftCOM52868.2021.9559109"},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Kaczmarek, S., and Sac, M. (2022). Performance Evaluation of a Multidomain IMS\/NGN Network Including Service and Transport Stratum. Appl. 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