TY - JOUR AU - Belső, Zoltán AU - Pap, László TI - On the Convex Hull of the Achievable Capacity Region of the Two User FDM OMA Downlink JF - INFOCOMMUNICATIONS JOURNAL J2 - INFOCOMM J VL - 15 PY - 2023 IS - 1 SP - 9 EP - 14 PG - 6 SN - 2061-2079 DO - 10.36244/ICJ.2023.1.2 UR - https://m2.mtmt.hu/api/publication/33733520 ID - 33733520 N1 - Export Date: 1 June 2023 AB - In multiple access channel systems, such as a mobile communication network, it is important to determine how to share the available resources (for example bandwidth and power) among the users. In recent years, one of the promising scheme is Non-Orthogonal Multiple Access (NOMA), where, unlike the traditional Orthogonal Multiple Access, OMA solution, signals for the different users overlap in some domain (power-domain NOMA, code-domain NOMA, etc). In order to evaluate the performance of any NOMA scheme, we need to compare the achievable bit rates of the users (the capacity region) to an OMA case with comparable parameters (for example, same total bandwidth, same total power and same channel conditions, etc). To make this comparison, we first need to know the capacity region for the OMA cases. Many papers make such comparison without detailing the derivation of the capacity region of the OMA case they compare to [1], [2], [3], [4]. In some cases, we have only one free parameter to choose (for example in uplink frequency division multiplexing systems for two users, it is the bandwidth ratio between the users), and the achievable capacity can be directly calculated for both users depending on the single parameter (hence the boundary of the capacity region is trivial). In other cases, such as downlink frequency division multiplexing systems, even for only two users, we have to allocate optimally two resources between the users: the bandwidth and the base station’s available power. Hence, it is far from being trivial to determine which combination is better and where the boundary of the capacity region is. In this paper, we provide a derivation for that case. LA - English DB - MTMT ER - TY - CHAP AU - Belső, Zoltán AU - Pap, László ED - Imre, Sándor ED - Gyimóthy, Szabolcs ED - Varga, Pál TI - Capacity Analysis of Partially Overlapping NOMA System with Two Users T2 - Proceedings of the 1st Workshop on Intelligent Infocommunication Networks, Systems and Services (WI2NS2) PB - BME Villamosmérnöki és Informatikai Kar CY - Budapest SN - 9789634219026 PY - 2023 SP - 47 EP - 51 PG - 5 DO - 10.3311/WINS2023-009 UR - https://m2.mtmt.hu/api/publication/33733500 ID - 33733500 LA - English DB - MTMT ER - TY - JOUR AU - Leiter, Ákos AU - Mohamad, Saleh Salah AU - Pap, László AU - Bokor, László TI - Survey on PMIPv6-based Mobility Management Architectures for Software-Defined Networking JF - INFOCOMMUNICATIONS JOURNAL J2 - INFOCOMM J VL - 14 PY - 2022 IS - 2 SP - 2 EP - 18 PG - 17 SN - 2061-2079 DO - 10.36244/ICJ.2022.2.1 UR - https://m2.mtmt.hu/api/publication/32900560 ID - 32900560 N1 - Nokia Bell Labs, Bókay János u. 36-42, Budapest, 1083, Hungary Department of Networked Systems and Services, Faculty of Electrical Engineering and Informatics, Budapest University of Technology and Economics, Műegyetem rkp. 3., Budapest, H-1111, Hungary ELKH-BME Cloud Applications Research Group, BME Informatics Building, Magyar tudósok krt 2, Budapest, H-1117, Hungary Export Date: 22 September 2022 AB - Software-Defined Networking (SDN) has changed the network landscape. Meanwhile, IP-based mobility management still evolves, and SDN affects it dramatically. Integrating Proxy Mobile IPv6 (PMIPv6) – a network-based mobility management protocol – with the SDN paradigm has created several promising approaches. This paper will present an extensive survey on the joint research area of PMIPv6 and SDN mobility management by detailing the available SDN-integrated network-based techniques and architectures that intend to accelerate handover and mitigate service disruption of mobility events in softwareized telecommunication networks. The article also provides an overview of where PMIPv6 can be used and how SDN may help reach those ways. LA - English DB - MTMT ER - TY - JOUR AU - Pap, László AU - Dr. Fürjes, János AU - Gódor, Győző TI - A RÁDIÓIRÁNYMÉRÉS KORSZERŰ MÓDSZEREI JF - SZAKMAI SZEMLE: A KATONAI NEMZETBIZTONSÁGI SZOLGÁLAT TUDOMÁNYOS-SZAKMAI FOLYÓIRATA J2 - SZAKMAI SZEMLE VL - 2021./1. szám PY - 2021 IS - 2021./1. szám SP - 1 EP - 18 PG - 18 SN - 1785-1181 UR - https://m2.mtmt.hu/api/publication/32900574 ID - 32900574 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Fodor, Gábor AU - Pap, László AU - Telek, Miklós TI - Recent Advances in Acquiring Channel State Information in Cellular MIMO Systems JF - INFOCOMMUNICATIONS JOURNAL J2 - INFOCOMM J VL - 11 PY - 2019 IS - 3 SP - 2 EP - 12 PG - 11 SN - 2061-2079 DO - 10.36244/ICJ.2019.3.2 UR - https://m2.mtmt.hu/api/publication/30971839 ID - 30971839 N1 - Ericsson Research, Stockholm, Sweden KTH Royal Institute of Technology, Stockholm, Sweden Budapest University of Technology and Economics, Budapest, Hungary MTA-BME Information Systems Research Group, Budapest, Hungary Cited By :2 Export Date: 30 September 2021 AB - In cellular multi-user multiple input multiple output (MU-MIMO) systems the quality of the available channel state information (CSI) has a large impact on the system performance. Specifically, reliable CSI at the transmitter is required to determine the appropriate modulation and coding scheme, transmit power and the precoder vector, while CSI at the receiver is needed to decode the received data symbols. Therefore, cellular MUMIMO systems employ predefined pilot sequences and configure associated time, frequency, code and power resources to facilitate the acquisition of high quality CSI for data transmission and reception. Although the trade-off between the resources used user data transmission has been known for long, the near-optimal configuration of the vailable system resources for pilot and data transmission is a topic of current research efforts. Indeed, since the fifth generation of cellular systems utilizes heterogeneous networks in which base stations are equipped with a large number of transmit and receive antennas, the appropriate configuration of pilot-data resources becomes a critical design aspect. In this article, we review recent advances in system design approaches that are designed for the acquisition of CSI and discuss some of the recent results that help to dimension the pilot and data resources specifically in cellular MU-MIMO systems. LA - English DB - MTMT ER - TY - JOUR AU - Knapp, Ádám AU - Pap, László TI - A novel mobile communication system using Pulse Position based Chirp Spread Spectrum modulation JF - JOURNAL OF COMMUNICATIONS SOFTWARE AND SYSTEMS J2 - J COMM SOFTW SYST VL - 14 PY - 2018 IS - 3 SP - 228 EP - 238 PG - 11 SN - 1845-6421 DO - 10.24138/jcomss.v14i3.582 UR - https://m2.mtmt.hu/api/publication/3418732 ID - 3418732 LA - English DB - MTMT ER - TY - BOOK ED - Pap, László TI - Tudományos távlatok [Elektronski izvor] : konferenciakötet / Vajdasági Magyar Tudóstalálkozó 2017, [Szabadka, 2017. április 8.] ET - 0 PB - Vajdasági Magyar Akadémiai Tanács CY - Újvidék PY - 2017 SP - 90 SN - 9788689095128 UR - https://m2.mtmt.hu/api/publication/3326578 ID - 3326578 LA - Hungarian DB - MTMT ER - TY - CHAP AU - Knapp, Ádám AU - Pap, László ED - Begusic, D ED - Rozic, N ED - Radic, J ED - Saric, M TI - Performance Analysis of Pulse Position based Chirp Spread Spectrum technique for Multiple Access T2 - 2017 25th International Conference on Software, Telecommunications and Computer Networks (SoftCOM) PB - IEEE CY - New York, New York SN - 9789532900781 PY - 2017 SP - 89 EP - 93 PG - 5 DO - 10.23919/SOFTCOM.2017.8115574 UR - https://m2.mtmt.hu/api/publication/3229168 ID - 3229168 LA - English DB - MTMT ER - TY - JOUR AU - Pap, László TI - Ember nélkül vezetett légi jármûvekkel kapcsolatos jövõbeli elképzelések JF - HADTUDOMÁNY: A MAGYAR HADTUDOMÁNYI TÁRSASÁG FOLYÓIRATA J2 - HADTUDOMÁNY VL - 26 PY - 2016 IS - különszám SP - 118 EP - 121 PG - 4 SN - 1215-4121 DO - 10.17047/HADTUD.2016.26.K.118 UR - https://m2.mtmt.hu/api/publication/3200350 ID - 3200350 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Pap, László TI - A mítosz folytatódik JF - TERMÉSZET VILÁGA J2 - TERMÉSZET VILÁGA VL - 147 PY - 2016 IS - II. különszám SP - 67 EP - 68 PG - 2 SN - 0040-3717 UR - https://m2.mtmt.hu/api/publication/3176107 ID - 3176107 N1 - Ismételt kiadás LA - Hungarian DB - MTMT ER -