2021 IEEE 22nd International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM), 2021
3rd Generation Partnership Project (3GPP) is working on the specifications related to the 5G sate... more 3rd Generation Partnership Project (3GPP) is working on the specifications related to the 5G satellite component, i.e., 5G Non-Terrestrial Networks (NTN). 5G NTN specifications can be used to build different spaceborne or airborne 5G systems. This article presents a 5G NTN extension to an open-source Network Simulator 3 (ns-3) and its 5G extension (5G LENA). The objective is to use the resulting System Level Simulator (SLS) in 3GPP standardization to evaluate different system concepts and parameterizations.
This article presents an overview of a secure multicast framework as well as a secure multicast s... more This article presents an overview of a secure multicast framework as well as a secure multicast system demonstrator used for end-to-end performance assessment of secure multicast service delivery over satellite. The security framework relies on IP security with multicast extensions and Group Domain of Interpretation (GDOI) multicast key management. The framework addresses challenges in the delivery of secure multicast services on top of multi-spot beam satellite networks by proposing several enhancements to overcome the bottlenecks.
Proceedings of the Seventh International Conference on Simulation Tools and Techniques, 2014
Digital Video Broadcasting (DVB) organisation has published a bluebook for the 2nd generation of ... more Digital Video Broadcasting (DVB) organisation has published a bluebook for the 2nd generation of satellite return link specification, DVB-RCS2. Also, the evolution of DVB-S2, currently called DVB-Sx, is in standardization process. Simulations have increased importance in standardization support as well as in internal product development due to the ability to provide faster feedback on technological solutions without the need for early-stage testbed and real systems development. However, there is a need for modular open-source satellite system simulator which would adopt the latest DVB satellite standards. Current simulators owned by satellite vendors, operators and research organizations may be proprietary, generally tailored for special purposes and/or may be based on commercial licenses. In this article we present the building blocks and architecture of satellite model developed on top of a widely used opensource system/packet level simulator Network Simulator 3 (NS-3). The satellite extensions are based on DVB-S2 and DVB-RCS2 specifications for forward and return links, respectively. Simulator module is developed to be highly modular and flexible to be able to match the future R&D needs of satellite system vendors, operators, research organizations, as well as scientific community.
Regressiotestaus on välttämätön ja olennainen osa ohjelmistokehitysprosessia. Regressiotestien mä... more Regressiotestaus on välttämätön ja olennainen osa ohjelmistokehitysprosessia. Regressiotestien määrän kasvaessa suureksi tai jonkin muun syyn takia saattaa regressiotestien suoritusaika olla liian pitkä kerralla suoritettavaksi. Tällöin tarvitaan keinoja valita ja priorisoida regressiotestisettiä suoritusajan lyhentämiseksi. Valinta ja priorisointi voidaan tehdä manuaalisesti, mutta useimmiten sitä automatisoidaan tai ainakin on pyrkimys automatisoida. Regressiotestien valinta ja priorisointi on varsin tutkittu aihealue, mutta käytännöntoteutuksien aineistoa on saatavilla varsin niukasti. Tässä pro gradu -tutkielmassa tutkitaan ja kehitetään tapa suorittaa valikoitu regressiotestijoukko ohjelmistoon tehdylle muutokselle perustuen testien koodikattavuustietoihin. Tutkittavana kohteena on erään yrityksen Android-sovelluksen kehitysprosessi, johon toteutetaan ja integroidaan tarvittavat ohjelmistot. Tutkimuksen kohteena oleva ohjelmistonkehitysprosessi noudattelee jatkuva integraatio -prosessin periaatteita. Kehitetyssä ohjelmistossa käytetyt valintamenetelmät pohjautuvat aihealueen tutkimukseen. Tutkielmassa kehitetyn ohjelmiston avulla voidaan valita regressiotestit olemassa olevasta suuremmasta testijoukosta ohjelmistomuutoksen laadun varmistamiseksi. Tutkielma esittelee käytännöntoteutuksen rajata regressiotestijoukkoa tuoden esille aihealueeseen ja toteutettuun ratkaisuun liittyviä mahdollisia jatkokehitys ja -tutkimusideoita.Regression testing is necessary and essential part of the software development process. When the amount of the regression tests increases or for some other reason, the execution of the full regression might take too long time. To shorten execution time of the regression tests, selection and prioritization of the regression test set is needed. Selection and prioritization can be performed manually, but often the process is automated or at least it was aimed to automate. Area of regression test selection and prioritization is studied widely, but few practical studies are existing. In this master’s thesis is studied and developed a way to perform a selected set of regression test cases for a software change based on the code coverage information produced by test case executions. A software development process of the case company is selected for the study target. In the process is developed an Android application. In the studied process is applied continuous integration principles. Selection methods utilized in the developed software are based on the area of the research. With the software developed in the study, it is possible to select the sub-set of the regression test cases from the full test set to ensure quality of the software change. The study introduces practical implementation to limit the full regression test set by proposing ideas for the future research in the subject area and to further develop the solution
Proceedings of the Seventh International Conference on Simulation Tools and Techniques, 2014
ABSTRACT Digital Video Broadcasting (DVB)} organisation has published a bluebook for the 2nd gene... more ABSTRACT Digital Video Broadcasting (DVB)} organisation has published a bluebook for the 2nd generation of satellite return link specification, DVB-RCS2. Also, the evolution of DVB-S2, currently called DVB-Sx, is in standardization process. Simulations have increased importance in standardization support as well as in internal product development due to the ability to provide faster feedback on technological solutions without the need for early-stage testbed and real systems development. However, there is a need for modular open-source satellite system simulator which would adopt the latest DVB satellite standards. Current simulators owned by satellite vendors, operators and research organizations may be proprietary, generally tailored for special purposes and/or may be based on commercial licenses. In this article we present the building blocks and architecture of satellite model developed on top of a widely used open-source system/packet level simulator Network Simulator 3 (NS-3). The satellite extensions are based on DVB-S2 and DVB-RCS2 specifications for forward and return links, respectively. Simulator module is developed to be highly modular and flexible to be able to match the future R&D needs of satellite system vendors, operators, research organizations, as well as scientific community.
2021 IEEE 22nd International Symposium on a World of Wireless, Mobile and Multimedia Networks (WoWMoM), 2021
3rd Generation Partnership Project (3GPP) is working on the specifications related to the 5G sate... more 3rd Generation Partnership Project (3GPP) is working on the specifications related to the 5G satellite component, i.e., 5G Non-Terrestrial Networks (NTN). 5G NTN specifications can be used to build different spaceborne or airborne 5G systems. This article presents a 5G NTN extension to an open-source Network Simulator 3 (ns-3) and its 5G extension (5G LENA). The objective is to use the resulting System Level Simulator (SLS) in 3GPP standardization to evaluate different system concepts and parameterizations.
This article presents an overview of a secure multicast framework as well as a secure multicast s... more This article presents an overview of a secure multicast framework as well as a secure multicast system demonstrator used for end-to-end performance assessment of secure multicast service delivery over satellite. The security framework relies on IP security with multicast extensions and Group Domain of Interpretation (GDOI) multicast key management. The framework addresses challenges in the delivery of secure multicast services on top of multi-spot beam satellite networks by proposing several enhancements to overcome the bottlenecks.
Proceedings of the Seventh International Conference on Simulation Tools and Techniques, 2014
Digital Video Broadcasting (DVB) organisation has published a bluebook for the 2nd generation of ... more Digital Video Broadcasting (DVB) organisation has published a bluebook for the 2nd generation of satellite return link specification, DVB-RCS2. Also, the evolution of DVB-S2, currently called DVB-Sx, is in standardization process. Simulations have increased importance in standardization support as well as in internal product development due to the ability to provide faster feedback on technological solutions without the need for early-stage testbed and real systems development. However, there is a need for modular open-source satellite system simulator which would adopt the latest DVB satellite standards. Current simulators owned by satellite vendors, operators and research organizations may be proprietary, generally tailored for special purposes and/or may be based on commercial licenses. In this article we present the building blocks and architecture of satellite model developed on top of a widely used opensource system/packet level simulator Network Simulator 3 (NS-3). The satellite extensions are based on DVB-S2 and DVB-RCS2 specifications for forward and return links, respectively. Simulator module is developed to be highly modular and flexible to be able to match the future R&D needs of satellite system vendors, operators, research organizations, as well as scientific community.
Regressiotestaus on välttämätön ja olennainen osa ohjelmistokehitysprosessia. Regressiotestien mä... more Regressiotestaus on välttämätön ja olennainen osa ohjelmistokehitysprosessia. Regressiotestien määrän kasvaessa suureksi tai jonkin muun syyn takia saattaa regressiotestien suoritusaika olla liian pitkä kerralla suoritettavaksi. Tällöin tarvitaan keinoja valita ja priorisoida regressiotestisettiä suoritusajan lyhentämiseksi. Valinta ja priorisointi voidaan tehdä manuaalisesti, mutta useimmiten sitä automatisoidaan tai ainakin on pyrkimys automatisoida. Regressiotestien valinta ja priorisointi on varsin tutkittu aihealue, mutta käytännöntoteutuksien aineistoa on saatavilla varsin niukasti. Tässä pro gradu -tutkielmassa tutkitaan ja kehitetään tapa suorittaa valikoitu regressiotestijoukko ohjelmistoon tehdylle muutokselle perustuen testien koodikattavuustietoihin. Tutkittavana kohteena on erään yrityksen Android-sovelluksen kehitysprosessi, johon toteutetaan ja integroidaan tarvittavat ohjelmistot. Tutkimuksen kohteena oleva ohjelmistonkehitysprosessi noudattelee jatkuva integraatio -prosessin periaatteita. Kehitetyssä ohjelmistossa käytetyt valintamenetelmät pohjautuvat aihealueen tutkimukseen. Tutkielmassa kehitetyn ohjelmiston avulla voidaan valita regressiotestit olemassa olevasta suuremmasta testijoukosta ohjelmistomuutoksen laadun varmistamiseksi. Tutkielma esittelee käytännöntoteutuksen rajata regressiotestijoukkoa tuoden esille aihealueeseen ja toteutettuun ratkaisuun liittyviä mahdollisia jatkokehitys ja -tutkimusideoita.Regression testing is necessary and essential part of the software development process. When the amount of the regression tests increases or for some other reason, the execution of the full regression might take too long time. To shorten execution time of the regression tests, selection and prioritization of the regression test set is needed. Selection and prioritization can be performed manually, but often the process is automated or at least it was aimed to automate. Area of regression test selection and prioritization is studied widely, but few practical studies are existing. In this master’s thesis is studied and developed a way to perform a selected set of regression test cases for a software change based on the code coverage information produced by test case executions. A software development process of the case company is selected for the study target. In the process is developed an Android application. In the studied process is applied continuous integration principles. Selection methods utilized in the developed software are based on the area of the research. With the software developed in the study, it is possible to select the sub-set of the regression test cases from the full test set to ensure quality of the software change. The study introduces practical implementation to limit the full regression test set by proposing ideas for the future research in the subject area and to further develop the solution
Proceedings of the Seventh International Conference on Simulation Tools and Techniques, 2014
ABSTRACT Digital Video Broadcasting (DVB)} organisation has published a bluebook for the 2nd gene... more ABSTRACT Digital Video Broadcasting (DVB)} organisation has published a bluebook for the 2nd generation of satellite return link specification, DVB-RCS2. Also, the evolution of DVB-S2, currently called DVB-Sx, is in standardization process. Simulations have increased importance in standardization support as well as in internal product development due to the ability to provide faster feedback on technological solutions without the need for early-stage testbed and real systems development. However, there is a need for modular open-source satellite system simulator which would adopt the latest DVB satellite standards. Current simulators owned by satellite vendors, operators and research organizations may be proprietary, generally tailored for special purposes and/or may be based on commercial licenses. In this article we present the building blocks and architecture of satellite model developed on top of a widely used open-source system/packet level simulator Network Simulator 3 (NS-3). The satellite extensions are based on DVB-S2 and DVB-RCS2 specifications for forward and return links, respectively. Simulator module is developed to be highly modular and flexible to be able to match the future R&D needs of satellite system vendors, operators, research organizations, as well as scientific community.
Uploads
Papers by Sami Rantanen