0000000000202973

AUTHOR

Lauri Sormunen

showing 3 related works from this author

Alkulukutesteistä

2016

Tämän tutkielman tavoitteena on esittää tunnetuimmat alkulukutestit niin matemaattiselta perustoiltaan kuin käytännön toteutuksiltaan ohjelmakoodin muodossa. Alkulukutestit jaotellaan yleisesti deterministisiin ja probabilistisiin testeihin; deterministiset testit antavat täysin varman vastauksen, mutta ovat suurille luvuille huomattavasti probabilistia testejä hitaampia. Probabilistiset testit ovat nopeita tehdä, mutta saattavat antaa väärän vastauksen. Testien suoritusaikaa mitataan karkeasti niiden suorittamiseksi vaadittavien laskutoimitusten lukumääarällä. Tutkielmassa käsitellään deterministisistä testeistä jakolaskumenetelmä, Wilsonin lause, Prothin testi, Lucasin ja Lehmerin testi j…

AlkuluvutAKSalgoritmitFermatalgoritmiMiller-RabinAlkulukutestiLucas-Lehmer
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Multi-Connectivity in 5G and Beyond Non-Terrestrial Networks

2022

The Fifth Generation (5G) communications systems aim to serve such service classes as Ultra-Reliable Low Latency Communications (URLLC), enhanced Mobile Broadband (eMBB), and massive Machine-Type Communications (mMTC). To meet the growing requirements posed to mobile networks, satellites can be used to complement the Terrestrial Networks (TNs). To increase the efficiency of the satellite communications involved, bandwidth-efficient techniques should be used. Multi- Connectivity (MC) is one such technique. In MC, a User Equipment (UE), for example, a smartphone, can be connected to multiple Next Generation Node Bs (gNBs) simultaneously. In this paper, an adaptive MC activation scheme for thr…

Low Earth Orbit (LEO) satellite3rd Generation Partnership Project (3GPP) standardization; 6G; Beyond 5G (B5G); Low Earth Orbit (LEO) satellite; satellite network simulator; throughput enhancement5G-tekniikkamatkaviestinverkottietoliikenneverkotsatellite network simulator3rd Generation Partnership Project (3GPP) standardizationtietoliikennealgoritmittietoliikennejärjestelmätlangaton viestintäBeyond 5G (B5G)Electrical and Electronic Engineeringtietoliikennetekniikkathroughput enhancementsatelliittiviestintäSoftware6GJournal of Communications Software and Systems
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Multi-Connectivity for User Throughput Enhancement in 5G Non-Terrestrial Networks

2022

To meet the increasing throughput and reliability demands, satellites may be used to complement the Fifth Gener-ation (5G) Terrestrial Networks (TNs). To increase the efficiency of the satellite communications involved, research on bandwidth-efficient techniques is needed. Multi-Connectivity (MC), where a user can be connected to multiple Next Generation Node Bs (gNBs) simultaneously, is one of such techniques. In this paper, the focus is on MC in NonTerrestrial Networks (NTNs) to improve users' experienced throughputs. First, a study of relevant specifications and algorithms is conducted. Then, the designed load-aware Secondary Node (SN) addition and traffic steering algorithms are present…

SATCOMlangaton tiedonsiirtonon-terrestrial networkssatellitemulti-connectivitycommunicationstietoliikennesatelliitit5G-tekniikkasimulointinetwork simulator 35Glangattomat verkot2022 18th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob)
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