Wyniki wyszukiwania - BazTech

1

Overview of QoS Metrics and Mechanisms Used in Mobile Networks

Wawok Dawid, Bonowicz Wiktoria, Zdankowski Piotr, Kelner Jan M.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

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2025

|

Vol. 19 No. 4

1221--1227

EN

Mobile networks constitute the primary telecommunications system used in road transport. They also play an important role in maritime transport, particularly in ports and coastal areas. The development of fifth-generation (5G) and beyond technologies — especially non-terrestrial networks (NTNs) and their integration with satellite communication — opens up the potential for mobile connectivity even on the high seas. Quality of service (QoS) in mobile networks is essential for ensuring high performance, reliability, and efficient management of network resources. This paper presents a comprehensive overview of the key QoS metrics and mechanisms employed in mobile networks across different generations, from third (3G) and fourth-generation (4G) to the latest advancements in 5G. It discusses the evolution of cellular networks and strategies for QoS management, with a focus on critical key performance indicators (KPIs) and traffic optimization mechanisms such as bandwidth management, packet prioritization, and service differentiation. The aim is to provide a detailed and systematic review of QoS technologies, highlighting the differences between network generations and their impact on end-users and telecom operators. These topics are particularly relevant in the context of growing demand for high-throughput and low-latency services, making QoS optimization one of the key challenges facing modern mobile networks.

2

Assessment of the impact of radio signal quality on the quality of network services

Laskowski Dariusz, Dąbrowski Karol, Syryło Tomasz, Polak Rafał, Konieczny Mariusz

Inżynieria Bezpieczeństwa Obiektów Antropogenicznych

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2025

|

Nr 4

57--70

EN

This study establishes quantitative relationships between physical-layer radio indicators and application-layer service quality in fifth-generation New Radio standalone non-public networks. Complete network infrastructure was deployed to measure Reference Signal Received Power, Reference Signal Received Quality, and Signal-to-Interference-plus-Noise Ratio across locations spanning excellent to poor propagation conditions. Throughput measurements demonstrated that network architecture and transport protocol selection significantly impact achievable data rates, with downlink performance strongly correlated to signal quality gradients. Voice over Internet Protocol assessment revealed distinct performance regimes, with catastrophic degradation occurring below critical radio thresholds. Results confirm that physical-layer measurements reliably predict user-experienced quality and that specific parameter boundaries draw transitions between acceptable and unacceptable service performance. These findings provide benchmarks for coverage planning and performance prediction in private mobile networks where predictable service quality is essential.

3

Multi-criteria MILP model for geo-distributed cloud configuration with advanced client preference integration

Zoltowska Izabela, Kozerski Kacper

International Journal of Electronics and Telecommunications

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2025

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Vol. 71, No. 4

art. no. 29, s. 1-7

EN

This paper addresses the problem of selecting a cloud infrastructure configuration for a geo-distributed enterprise. It extends the well-known virtual machine (VM) placement problem to consider multiple datacenters so they can serve a distribution of end-users in their geographic locations in an optimal way in terms of low end-user latency, and acceptable costs. We approach this problem by formulating a multi-criteria mixed integer linear program (MILP) that integrates an aspiration/reservation-based modeling of the client’s preferences. A newly proposed model supports the selection of virtual in-stances across cloud regions, ensuring flexible trade-offs among QoS objectives: total infrastructure cost, user distance, and edge-to-central latency. Case study results based on Google datacenters in Europe demonstrate the flexibility of our method in providing Pareto-optimal solutions aligned with varied preferences. The approach contributes to the growing preference-aware cloud resource allocation field and offers a scalable solution to the service composition problem in heterogeneous cloud environments.

4

Modeling of priority-based queuing algorithm for low-power wireless body area network

Wan Hassan Wan Haszerila, Darmawaty Ali Mohd, Juwita Sultan Mohd

International Journal of Electronics and Telecommunications

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2025

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Vol. 71, No. 4

art. no. 26, s. 1-6

EN

This paper presents a novel mathematical framework utilizing an M/M/1 queuing algorithm with non-preemptive priority, modeled using SimEvents in MATLAB. The proposed framework evaluates the main Quality of Services (QoS) metric, specifically average delays across high, medium, and low priority queues. Comparison between the simulated M/M/1 queuing model and its theoretical calculations demonstrated close alignment, with the simulated results closely approximating the theoretical values. This validation confirms the effectiveness of the simulation model in representing the theoretical framework. Additionally, the framework complies with the IEEE 802.15.6 standard by maintaining average delays below the 125 ms threshold across all priority levels.

5

Differentiated service quality analysis based on QoS traffic prioritisation

Strzęciwilk Dariusz

International Journal of Electronics and Telecommunications

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2025

|

Vol. 71, No. 1

285-292

EN

This paper presents the results of a transmission quality study in a network with a DiffServ architecture. The impact of differentiated services based on traffic prioritisation was studied. A carrier network model in a differentiated servicesarchitecture with traffic prioritisation was designed and tested. The operator network used the OSPF protocol, while the client networks communicated using the EIGRP protocol. Different traffic classes in the queueing systems were studied, influencing delay and delay variation. Traffic generated with Exfo FTB-860 test equipment was introduced into the designed network. The measurement equipment used supported the ITUT Y.1564 measurement methodologies. The transmission quality was tested according to the EtherSAM methodology and carried out in bidirectional mode. The tests carried out showed the influence of different data lengths on the quality of transmission in the test network. The results proved that the correct implementation of QoS mechanisms in the network makes it possible to ensure the required quality of service. It was shown that for delay-sensitive traffic which fluctuates beyond its nominal speed, queuing systems allow transmission quality to be achieved with guaranteed bandwidth and delay.

6

User experience evaluation study on the quality of 1K, 2K, and 4K H.265/HEVC video content

Falkowski-Gilski Przemyslaw, Uhl Tadeus, Hoppe Christian

Zeszyty Naukowe Politechniki Morskiej w Szczecinie

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2024

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nr 77 (149)

38--46

EN

Nowadays, most content creators focus on distributing rich media at the highest possible resolution. Currently, the majority of sold consoles, media players, computer hardware, as well as displays and TVs are advertised as 4K-compatible. The same trend is observed in the case of popular online streaming services and terrestrial TV broadcasts. Generally speaking, it is assumed that higher bitrates provide higher subjective judgements. In this paper, we present the results of a user experience (UX) evaluation study on the quality of video content coded and transmitted in different resolutions in the internet protocol (IP) environment. The image resolutions include 1K (1920×1080 pixels; full-HD), 2K (2560×1440 pixels; wide-QHD), and 4K (3840×2160 pixels; ultra-HD) content that are processed in the H.265/HEVC (high-efficiency video coding) format. A subjective evaluation is carried out in a laboratory consisting of 20 iMacs with a 21.5-inch 4K Retina (4096×2304 pixels) display. The group of viewers included 28 individuals aged between 21‒35 years old, comprising people with and without visual impairments. The obtained UX results are compared with previous experiments, including both objective quality of service (QoS) and subjective quality of experience (QoE), as well as the impact of downscaling to 1K from 2K and 4K. The outcomes of this study may be of particular interest to any party interested in video content processing and distribution, as well as consumption and storage.

7

Realizacja próbnika systemu rejestrowania i monitorowania parametrów jakościowych stosującego standard IPFIX

Kaczmarek Sylwester, Zalewski Krzysztof

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

|

2024

|

nr 4

253--259

PL

Nadzór parametrów jakościowych w sieci z protokołem IP jest jedną z ważniejszych funkcji jaką musi dysponować Operator sieci telekomunikacyjnej. W pracy przedstawiono koncepcję systemu rejestracji i monitorowania przeznaczonego do realizacji tego celu. Jest to rozwiązanie pasywne stosujące rozszerzenie standardu IPFIX, które określono mianem SIPFIX. Opisano praktyczną realizację i wyniki testów Próbnika, jednego z podstawowych elementów składowych tego systemu. Wyniki potwierdziły możliwość realizacji zaproponowanego systemu.

EN

Supervision of quality parameters in a network with the IP protocol is one of the most important functions that a telecommunications network operator must have. The paper presents the concept of a recording and monitoring system intended to achieve this goal. This is a passive solution that uses an extension of the IPFIX standard, called SIP-FIX. The practical implementation and test results of the Sampler, one of the basic components of this system, are described. The results confirmed the feasibility of implementing the proposed system.

8

Ocena parametrów QoS usługi transmisji danych z wykorzystaniem modułów DTS SOL8SDR dla rozwiązań dronowych

Maślanka Krzysztof, Wojtuń Jarosław, Kelner Jan M.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2024

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nr 4

241--244

PL

Rynek platform i aplikacyjnych zastosowań bezzałogowych statków powietrznych (BSP) jest obecnie jednym z najbardziej dynamicznie rozwijających się gałęzi przemysłu i usług, zarówno w odniesieniu do segmentu cywilnego jak i wojskowego. W tym artykule przedstawiamy testy jakości usług dla radiowego modułu DTC SOL8SDR wykorzystywanego na BSP do transmisji danych. Moduł ten będzie wykorzystany w systemie rozpoznania radioelektronicznego na grupie BSP.

EN

The market for platforms and applications of unmanned aerial vehicles (UAVs) is currently one of the most dynamically developing industries and services, both in the civil and military segments. In this paper, we present quality of service (QoS) tests for the SOL8SDR DTC radio module used on a UAV for data transmission. This module is planned to be used in the radioelectronic reconnaissance system of a UAV group.

9

MANIANA: urządzenie IoT do testowania QoS i QoE aplikacji w sieci domowej

Wanat Dominika, Juszka Dawid, Leszczuk Mikołaj, Janowski Lucjan

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2024

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nr 4

175--178

PL

Metryki QoS (Quality of Service) w testach aplikacji internetowych dostarczają wielu informacji o zachowaniu danej aplikacji w warunkach niestabilnego połączenia sieciowego. Pomiar ten jest jednak często dokonywany w hermetycznych warunkach laboratoryjnych. Skutkuje to uproszczeniem ich analizy kosztem niepełnego obrazu zachowania i środowiska aplikacji oraz zachowań użytkownika. Aby zaadresować ten problem, opracowane urządzenie nazwane MANIANA (Mobile Appliance for Network Interrupting, Analysis & Notorius Annoyance). Umożliwia ono przeprowadzanie testów aplikacji w sieci domowej użytkownika. Oparte jest ono o platformę Raspberry Pi 4 oraz otwartoźródłowe komponenty, umożliwiające testy aplikacji w sposób bezpieczny, wydajny oraz uniwersalny.

EN

QoS (Quality of Service) metrics obtained during network application testing provide lots of information about applications’ behavior in conditions of unstable network connections. However, obtaining this values is done in a hermetic lab environment. That simplifies its analysis and provides an incomplete picture of applications’ behavior, environment and user behaviour. To address this problem, a device called MANIANA (Mobile Appliance for Network Interrupting, Analysis & Notorius Annoyance) was developed. It allows for conducting application tests in a home environment. The device is made based Raspberry Pi 4 minicomputer and Open Source solution and allows safe, robust and universal testing applications.

10

Network optimization using real time polling service with and without relay station in WIMAX networks

Khan Mubeen Ahmed, Kumar Awanit, Bandhu Kailash Chandra

Journal of Automation Mobile Robotics and Intelligent Systems

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2024

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Vol. 18, No. 3

89--98

EN

IEEE 802.16 can be seen as a compelling replacement for conventional broadband technologies because its primary goal is to provide Broadband Wireless Access (BWA). The variable and uncertain nature of wireless networks makes it much more challenging to ensure QoS in this network. WiMAX Technology is used to support various quality of services which includes UGS, rtps, nrtps, ertps, and Best Effort. This study employs an IEEE 802.16 network simulator, which offers adaptable and reliable features for assessing a particular QoS parameters for rtps. Achieving better internet performance in real time services is currently a challenge, and it is in need of a present scenario. This work emphasized better internet service, with good quality of service using rtps with Relay Station and Without Relay Station. In this work the CBR packet size, CBR data rate, and data rate with rtps service are fine-tuned for achieving better performance with good quality of service. When comparing uplink connections in rtps with and without relay station, it is found that the throughput in the uplink is 200% greater when using a relay station. The throughput and goodput are evaluated in uploading and downloading with single and multiple subscriber stations and we observed that the multiple subscriber stations in downloading give better performance, as compared to single subscriber stations. The throughput and goodput in single subscriber stations is better than multiple subscriber stations in uploading. The academic researchers and commercial developers can use this analysis to validate different WiMAX Network implementation mechanisms and parameters.

11

Software Define Wide Area Network (SDWAN) network optimization analysis on radiolink-fiber optic access media migration

Nugraha Beny, Silalahi Lukman, Muslim Muslim, Khotimah Mega Nur, Firdaus Dhiya Akmal, Geofany Christ

International Journal of Electronics and Telecommunications

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2024

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Vol. 70, No. 4

961-967

EN

The development of technology in radiolink networks has grown rapidly and is suitable to be implemented on wide coverage area networks, but weather and physical environment factors greatly affect signal conditions. The background that has been stated, this study proposes migration to fiber optic access media because it is able to send data faster and is not affected by electromagnetic interference and is stable. Furthermore, this study conducted an optimization analysis on the SDWAN (Software Defined Wide Area Network) network, SDWAN functions as a firewall that can provide connectivity support and infrastructure network development in branch offices with system security in one centralized platform. The test method used in this study is a connectivity test from each remote fortigate located in the branch office. While the analysis method used is Quality of Service (QoS), which is a method to find out data delivery (Packet Loss, Delay and Jitter) using the FortiManager application, which is the analytical and experimental proof of concept of the SDWAN network model using the BGP method for auto failover testing.

12

Implementation of auto failover on SD-WAN technology with BGP routing method on Fortigate routers at XYZ company

Silalahi Lukman Medriavin, Amaada Vahira, Budiyanto Setiyo, Simanjuntak Imelda Uli Vistalina, Rochendi Agus Dendi

International Journal of Electronics and Telecommunications

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2024

|

Vol. 70, No. 1

5--11

EN

The current technological development is SD-WAN (Software-Defined Wide Area Network) which provides highperformance access for users located far from the head office so as to allow faster network connections and has been facilitated automation techniques for branch offices. This research solves the problem of XYZ company because it is known that the company requires network connectivity with a high SLA (Service Level Agreement) and no downtime in the information exchange process. This research hypothesis assumes that using SD-WAN would be ideal and the problems with XYZ company were resolved. The purpose of this research is the implementation of a WAN network using SD-WAN technology against two ISPs on the FortiGate router, as well as testing QoS (Quality of Service) that has been configured using the BGP (Border Gateway Protocol) routing method. This research plan consists of ISP-A using IP-VPN (Internet Protocol-Virtual Private Network) and ISP-B using broadband Internet. The test scenario was carried out using 3 methods, namely Full Service Scenario, Fail Over Scenario-1 when the IP VPN service is down and Fail Over Scenario-2 when the broadband Internet service is down. The final results of the research have obtained "Satisfactory" results for both services, including the average index on ISP-A and ISP-B of 3.7.

13

Study on transmission quality in cellular 4G and 5G networks between 2019–2021: Impact of the COVID-19 pandemic on the level of provided services by operating base transceiver stations

Falkowski-Gilski Przemysław, Uhl Tadeus

Zeszyty Naukowe Akademii Morskiej w Szczecinie

|

2023

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nr 73 (145)

54--63

EN

The COVID-19 pandemic has significantly limited user mobility, not least among students. Remote learning had a particular impact on resource allocation in relation to using terrestrial cellular networks, especially 4G systems in urban agglomerations. This paper presents the results of a quality evaluation of an outdoor environment, carried out between 2019 and 2021 on the campus of a technical university. Annual studies are conducted using our own custom-built mobile application, installed on 50 mobile devices (i.e., smartphones) running Android OS. This study aims to determine the impact of reduced user mobility on access parameters in mobile networks, that is, both download and upload throughput as well as delay (ping), with a particular focus on serving base transceiver stations (BTSs). This research scenario involves long-term evolution (LTE) compatible user equipment (UE) that operates under four Polish mobile network operators (MNO), which includes roaming connections and the newly launched 5G standard.

14

AI-assisted dimensioning of 5G network slices – review and perspectives

Dulas Dominik, Walkowiak Krzysztof

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

|

2023

|

nr 4

204--207

EN

5G network slicing applications enable a set of new services that will automate industries and enhance our daily life. In this paper, we provide a review of challenges, investigation of the state of the art and show perspectives for future work in the area of AI-assisted dimensioning of 5G network slicing. Although there is a lot of research done, especially in the aspects of traffic predictions and network slicing management with AI assistance, in the current international publications there is no holistic solution for dimensioning of 5G radio cloud with network slicing.

PL

Zastosowanie plastrowania sieci 5G umożliwi stworzenie zestawu nowych usług celem automatyzacji przedsiębiorstw oraz ułatwienia naszego życia codziennego. W tym artykule, przedstawiamy przegląd wyzwań, analizujemy obecny stan wiedzy oraz wskazujemy perspektywy w zakresie wymiarowania plastrów sieci 5G wspomaganego metodami sztucznej inteligencji. Pomimo wielu badań, w szczególności w zakresie predykcji ruchu i zarządzania plastrami wspomaganych metodami AI, w obecnych badaniach naukowych nie znajdujemy prac przedstawiających całościowe rozwiązanie do wymiarowania plastrów sieci 5G w chmurze.

15

Quality of service (QoS) by utility evolved packet core (EPC) in LTE network

Mohd Sultan Juwita, Anak Gapar Glen Lendle, Benachour Philip, Yusop Azdiana Md

Przegląd Elektrotechniczny

|

2023

|

R. 99, nr 1

44--47

EN

LTE which stands for Long Term Evolution is one of wireless broadband technology which provides an increased on both network capacity and speed to user. As LTE network grows, LTE mobile data services becomes demanding mode of communication. From audio call to video conference, video conference to online bank transaction, user lives conveniently with LTE. The speed of LTE network is up to 300 Mbps with the coverage of 100 km. However, LTE network could not be standalone on this chain for so long as it might occur generalization of services where the quality cannot be guarantee. Here Quality of Service (QoS) play it roles in managing and design wireless services that suit every single user necessity. QoS refers to the ability of a network to accomplish maximum bandwidth and handle with another element within network performance. Not to mention, minor support that made this possible is by studying on how EPC could make a different in improving the QoS in LTE network. Evolved Packet Core (EPC) is designed to support smooth transfer for voice and data to a base station. Hence, investigation in benefit of EPC toward QoS in LTE is carry out and simulation result obtained will be evaluated throughout this paper.

PL

LTE, co oznacza Long Term Evolution, to jedna z bezprzewodowych technologii szerokopasmowych, która zapewnia użytkownikowi zwiększoną przepustowość i szybkość sieci. Wraz z rozwojem sieci LTE mobilne usługi transmisji danych LTE stają się wymagającym sposobem komunikacji. Od połączenia audio po wideokonferencję, wideokonferencję po transakcję bankową online, użytkownik żyje wygodnie dzięki LTE. Szybkość sieci LTE wynosi do 300 Mb/s przy zasięgu 100 km. Jednak sieć LTE nie mogłaby być samodzielna na tym łańcuchu tak długo, jak mogłoby dojść do uogólnienia usług, w przypadku których nie można zagwarantować jakości. Tutaj Quality of Service (QoS) odgrywa rolę w zarządzaniu i projektowaniu usług bezprzewodowych, które odpowiadają potrzebom każdego użytkownika. QoS odnosi się do zdolności sieci do osiągnięcia maksymalnej przepustowości i obsługi innego elementu w ramach wydajności sieci. Nie wspominając już o niewielkim wsparciu, które to umożliwiło, poprzez zbadanie, w jaki sposób EPC może coś zmienić w poprawie QoS w sieci LTE. Evolved Packet Core (EPC) został zaprojektowany w celu obsługi płynnego przesyłania głosu i danych do stacji bazowej. Dlatego prowadzone są badania na korzyść EPC w kierunku QoS w LTE, a uzyskane wyniki symulacji będą oceniane w niniejszym artykule.

16

Disturbance of trains movement under the ERTMS control system

Sumiła Marek

Journal of Civil Engineering and Transport

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2023

|

Vol. 5, No. 2

49--60

EN

The article presents a discussion leading to the identification the possible causes of disturbances in train movements under the supervision of the European Rail Traffic Management System ERTMS. As a consequence of detected events, unintentional initiation of a train braking procedure occurs despite the absence of objective reasons for such behaviour. In essence, the paper presents the ERTMS as a real-time system based on the two subsystems ETCS and GSM-R. Each of these subsystems includes a vehicle part and an infrastructure part. The article starts by identifying general considerations that may affect the lack of compatibility between vehicle and trackside infrastructure as a result of changes in versions of the specification (baseline). The following part of the article reviews the process leading to train braking is reviewed. The next part of the article refers to ETCS scenarios and parameters affecting the system response during operation. It referred to the considerations of message transmission between the ETCS ground infrastructure and the vehicle via the telecommunications network, including the GSM-R. The final section focuses on the causes and consequence of the overlap of the RBC’s and GSM-R radio cells boundaries. The article concludes with a brief summary and conclusions.

PL

W artykule podjęto dyskusję prowadzącą do wskazania możliwych przyczyn zaburzeń w ruchu pociągów pod nadzorem europejskiego systemu sterowania ruchem kolejowym ERTMS. W następstwie wykrytych zdarzeń dochodzi do nieintencjonalnego wdrażania procedury hamowania pociągu pomimo braku obiektywnych przesłanek do takiego zachowania. Zasadniczo, w artykule przedstawiono system ERTMS jako system czasu rzeczywistego oparty na dwóch podsystemach ETCS i GSM-R. Każdy z tych podsystemów posiada część pojazdową i infrastrukturalną. Na wstępie artykułu wskazano na ogólne przesłanki mogące mieć wpływ na brak zachowania kompatybilności pojazdu i infrastruktury torowej wynikającą ze zmian w kolejnych wersjach specyfikacji (baseline). W dalszej części artykułu przeprowadzono proces prowadzący do hamowania pociągu. W dalszej części artykułu odwołano się do scenariuszy ETCS i parametrów mających wpływ na reakcje systemu w czasie działania. Odniesiono się do uwarunkowań transmisji wiadomości pomiędzy naziemną infrastrukturą ETCS i pojazdem poprzez sieć telekomunikacyjną, w tym GSM-R. W końcowej części skupiono się na przyczynach i następstwie wdrażania hamowania pociągu będących konsekwencją nakładania się granic obszarów sterowania ruchem kolejowym objętych obszarami odpowiedzialności RBC i obszarami komórek sieci radiowej GSM-R. Artykuł kończy krótkie podsumowanie i wnioski.

17

QIBMRMN: Design of a Q-Learning based Iterative sleep-scheduling & hybrid Bioinspired Multipath Routing model for Multimedia Networks

Doorwar Minaxi, Malathi P

International Journal of Electronics and Telecommunications

|

2023

|

Vol. 69, No. 4

776--784

EN

Multimedia networks utilize low-power scalar nodes to modify wakeup cycles of high-performance multimedia nodes, which assists in optimizing the power-toperformance ratios. A wide variety of machine learning models are proposed by researchers to perform this task, and most of them are either highly complex, or showcase low-levels of efficiency when applied to large-scale networks. To overcome these issues, this text proposes design of a Q-learning based iterative sleep-scheduling and fuses these schedules with an efficient hybrid bioinspired multipath routing model for largescale multimedia network sets. The proposed model initially uses an iterative Q-Learning technique that analyzes energy consumption patterns of nodes, and incrementally modifies their sleep schedules. These sleep schedules are used by scalar nodes to efficiently wakeup multimedia nodes during adhoc communication requests. These communication requests are processed by a combination of Grey Wolf Optimizer (GWO) & Genetic Algorithm (GA) models, which assist in the identification of optimal paths. These paths are estimated via combined analysis of temporal throughput & packet delivery performance, with node-to-node distance & residual energy metrics. The GWO Model uses instantaneous node & network parameters, while the GA Model analyzes temporal metrics in order to identify optimal routing paths. Both these path sets are fused together via the Q-Learning mechanism, which assists in Iterative Adhoc Path Correction (IAPC), thereby improving the energy efficiency, while reducing communication delay via multipath analysis. Due to a fusion of these models, the proposed Q-Learning based Iterative sleep-scheduling & hybrid Bioinspired Multipath Routing model for Multimedia Networks (QIBMRMN) is able to reduce communication delay by 2.6%, reduce energy consumed during these communications by 14.0%, while improving throughput by 19.6% & packet delivery performance by 8.3% when compared with standard multimedia routing techniques.

18

Application of MPLS Tunnel Service L2TP-VPN Optimization Concept with Traffic Engineering Method for Looping-Protection Service Analysis

Silalahi Lukman Medriavin, Budiyanto Setiyo, Simanjuntak Imelda Uli Vistalina, Effendi Rukhi Ali, Fernando, Rochendi Agus Dendi, Kampono Irfan

International Journal of Electronics and Telecommunications

|

2023

|

Vol. 69, No. 1

115--120

EN

This research began when observations were made on any-to-any-connection services that require QoS (Quality of Service) and tunnel measurements. Tunnel is a technique to interconnect between local networks that are separated through a public network. Research questions found looping caused by traffic issues when sending data in the MPLS service layer-2 tunneling service. Furthermore, this research hypothesis proposes optimizing QoS performance in the application of the SR-TE (Segment Routing-Traffic Engineering) method in the MPLS (Multi-Protocol Label Switching) network and analyzing traffic based on MAC addresses using the looping-protection method. This research contributes to optimizing the MPLS network and is a recommended solution for simplifying control-plane operation, especially the SR-TE method and looping-protection in the L2- VPN MPLS service. The purpose of this study is to analyze the performance of MPLS networks, as well as analyze the application of L2-VPN (Layer 2 Virtual Private Network) MPLS networks. The targeted TKT (Technology Readiness Level) is 3rd-Level, which is an analytical and experimental proof of the MPLS tunnel network model on Layer-2 VPN services. The results of the research concluded that testing the SR-TE method is a solution to simplify the process of labeling data traffic that is global labelling, then the looping-protection method is a solution to eliminate looping indications. The QoS obtained has also shown an "excellent" category based on TIPHON standards.

19

Badanie jakości transmisji w sieciach komórkowych na przestrzeni lat 2019-2021: wpływ pandemii COVID-19 napoziom świadczonych usług

Falkowski-Gilski Przemysław, Uhl Tadeusz

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2022

|

nr 4

206--209

PL

Pandemia COVID-19 znacząco ograniczyła mobilność użytkowników, a w szczególności studentów. Nauka zdalna miała szczególny wpływ na sposób przydziału zasobów w sieciach komórkowych. Niniejsza praca przedstawia wyniki badań dotyczących jakości transmisji w środowisku zewnątrzbudynkowym. Kampanię pomiarową w latach 2019-2021 przeprowadzono na terenie kampusu uczelni technicznej. Każdego roku badania wykonano przy użyciu własnej autorskiej aplikacji mobilnej, zainstalowanej na 50 smartfonach działających pod kontrolą systemu Android.

EN

The COVID-19 pandemic has significantly limited user mobility, mainly students. Remote learning had a particular impact on resource allocation in case of cellular networks. This paper presents results of a quality evaluation in an outdoor environment. The measurement campaign between 2019-2021 was carried out at the campus of a technical university. Each year studies were performed using our own custom-build mobile application, installed on 50 smartphones running Android OS.

20

Analiza jakości transmisji treści audio-wideo w symulowanym łączu telekomunikacyjnym z wykorzystaniem techniki OFDM

Zamłyńska Monika, Falkowski-Gilski Przemysław

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2022

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nr 4

219--223

PL

Wdrożenie niezawodnego systemu komunikacji audio-wideo przynosi wiele korzyści. Z uwagi na fakt, że ilość dostępnego pasma stale się kurczy, badacze koncentrują się na nowatorskich metodach transmisji. Obecnie technika OFDM (Orthogonal Frequency Division Multiplexing) jest szeroko stosowana zarówno w mediach przewodowych, jak i bezprzewodowych. W pracy przedstawiono badania jakości QoS (Quality of Service) symulowanego łącza transmisji danych, przy zmiennych poziomach SNR (Signal-to-Noise Ratio) oraz BER (Bit Error Rate).

EN

Application of a reliable audio-video communication system brings many advantages. As the amount of available bandwidth continues to shrink, researchers focus on novel types of transmission. Nowadays, OFDM (Orthogonal Frequency Division Multiplexing) is widely utilized both in wired and wireless media. In this paper we investigate the QoS (Quality of Service) parameters of a simulated data transmission system, including SNR (Signal-to-Noise Ratio) and BER (Bit Error Rate).