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    Wyświetlanie 1-5 z 5
    Tytuł:
    Implementation of a 4G/5G Base Station Using the srsRAN Software and the USRP Software Radio Module
    Autorzy:
    Flakowski, Wojciech
    Krasicki, Maciej
    Krenz, Rafał
    Powiązania:
    https://bibliotekanauki.pl/articles/24200744.pdf
    Data publikacji:
    2023
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    base station
    radio access network
    radio channel power
    radio link throughput
    software-defined radio
    user equipment
    Opis:
    This article presents the potential applications and scenarios for the implementation of a software-defined radio (SDR) module operating as a base station in 4G/5G networks. The paper presents test configurations of the srsRAN software environment in conjunction with various types of programmable radio modules. Then, the key performance metrics of the mobile telephony system and potential problems that may be encountered while implementing hardware and software layers are presented.
    Źródło:
    Journal of Telecommunications and Information Technology; 2023, 3; 30--40
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A flexible approach to combating chromatic dispersion in a centralized 5G network
    Autorzy:
    Ilgaz, Mehmet Alp
    Baliž, K. Vuk
    Batagelj, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1818223.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
    Tematy:
    chromatic dispersion
    opto-electronic oscillator
    power penalty
    radio access network
    tunable dispersion-compensation module
    Opis:
    This article proposes and examines a solution in which the base-station for the fifth generation radio access network is simplified by using a single millimeter-wave oscillator in the central-station and distributing its millimeter-wave signal to the base-stations. The system is designed in such a way that the low-phase-noise signal generated by an opto-electronic oscillator is transmitted from the central-station to multiple base-stations via a passive optical network infrastructure. A novel flexible approach with a single-loop opto-electronic oscillator at the transmitting end and a tunable dispersion-compensation module at the receiving end(s) is proposed to distribute a power-penalty-free millimeter-wave signal in the radio access network. Power-penalty-free signal transmission from 10 MHz up to 45 GHz with an optical length of 20 km is achieved by a combination of a tunable dispersion-compensation module and an optical delay line. In addition, measurements with a fixed modulation frequency of 39 GHz and discretely incrementing optical fiber lengths from 0.625 km to 20 km are shown. Finally, a preliminary idea for an automatically controlled feedback-loop tuning system is proposed as a further research entry point.
    Źródło:
    Opto-Electronics Review; 2020, 28, 1; 35--42
    1230-3402
    Pojawia się w:
    Opto-Electronics Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ranking of LTE cells based on key performance indicators using MCDM methods
    Autorzy:
    Lopes Neto, Pedro Nunes
    Freire Junior, José Celso
    Tuna, Celso Eduardo
    Powiązania:
    https://bibliotekanauki.pl/articles/2211970.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Ekonomiczny w Katowicach
    Tematy:
    long-term evolution
    multiple criteria methods
    radio access network performance management
    self-organizing networks
    Opis:
    The growth in worldwide data traffic and user subscriptions in mobile telecommunication networks makes it increasingly difficult to manage network performance in an environment already containing multiple radio access technologies. Despite the rise of 5G, LTE remains the dominant technology, and new cells are installed daily to support traffic growth and new services such as voice over LTE. Detecting faulty cells in the network is one of the main concerns of operators. Self organizing networks have been introduced to deal with this problem, and their self healing functionality has improved cell fault management. Nonetheless, faulty cell detection remains challenging, and most of the tasks involved are still done manually. This paper introduces a new method of faulty cell detection in an LTE radio access network, applying multiple criteria methods to this problem. The cells are ranked based on selected key performance indicators, using the multi attribute utility theory to construct a utility function. The analytic hierarchy process is used to define weights for the criteria.
    Źródło:
    Multiple Criteria Decision Making; 2022, 17; 46-68
    2084-1531
    Pojawia się w:
    Multiple Criteria Decision Making
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Practical Approach to IP Scheduled Throughput Measurements in Dual Connectivity Systems
    Autorzy:
    Zięba, Arkadiusz
    Kollar, Martin
    Tatarczyk, Krzysztof
    Sadowski, Jarosław
    Powiązania:
    https://bibliotekanauki.pl/articles/27311949.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    IP Scheduled Throughput
    distributed system
    Edge computing
    cloud
    Long Term Evolution (LTE)
    Evolved Universal Terrestrial Radio Access Network (E-UTRAN)
    Carrier aggregation (CA)
    UE Throughput
    Key Performance Indicator (KPI)
    Quality of Experience (QoE)
    quality of service (QoS)
    Opis:
    IP scheduled throughput defined according to 3GPP TS 36.314 reflects user throughput regardless of traffic characteristics, and therefore has become one of the most important indicators for monitoring Quality of Service (QoS) of the end user in Evolved Universal Terrestrial Radio Access Network (E-UTRAN). However, networks built on a distributed architecture make the above definition impossible to be applied directly due to the implementation challenges. This paper gives an overview of the classical Long Term Evolution (LTE) architecture as opposed to Dual Connectivity (DC) topology and focuses on a novel method of solving the calculation issue with the IP scheduled throughput measurement in edge computing environment. Experimental results show a good agreement with the real end user perception.
    Źródło:
    International Journal of Electronics and Telecommunications; 2023, 69, 4; 645--654
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of Latency-Aware Network Slicing in 5G Packet xHaul Networks
    Autorzy:
    Klinkowski, Mirosław
    Powiązania:
    https://bibliotekanauki.pl/articles/27311921.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    5G
    radio access networks
    packet-switched xHaul
    latency-sensitive network
    network slicing
    traffic prioritization
    network optimization
    Opis:
    Packet-switched xHaul networks are a scalable solution enabling convergent transport of diverse types of radio data flows, such as fronthaul / midhaul / backhaul (FH / MH / BH) flows, between remote sites and a central site (hub) in 5G radio access networks (RANs). Such networks can be realized using the cost-efficient Ethernet technology, which enhanced with time-sensitive networking (TSN) features allows for prioritized transmission of latency-sensitive fronthaul flows. Provisioning of multiple types of 5G services of different service requirements in a shared network, commonly referred to as network slicing, requires adequate handling of transported data flows in order to satisfy particular service / slice requirements. In this work, we investigate two traffic prioritization policies, namely, flowaware (FA) and latency-aware (LA), in a packet-switched xHaul network supporting slices of different latency requirements. We evaluate the effectiveness of the policies in a networkplanning case study, where virtualized radio processing resources allocated at the processing pool (PP) facilities, for two slices related to enhanced mobile broadband (eMBB) and ultra-reliable low latency communications (URLLC) services, are subject to optimization. Using numerical experiments, we analyze PP cost savings from applying the LA policy (vs. FA) in various network scenarios. The savings in active PPs reach up to 40% − 60% in ring scenarios and 30% in a mesh network, whereas the gains in overall PP cost are up to 20% for the cost values assumed in the analysis.
    Źródło:
    International Journal of Electronics and Telecommunications; 2023, 69, 2; 335--340
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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