12 Risultati
A measurement campaign quantifying the impact of intermodulation in 5G TDD networks
Critical infrastructure: With the deployment of TDD networks, the mobile network community recognizes the critical importance of cell synchronization and the use of uniform TDD patterns across different networks for the proper operation of mobile radio networks. Variety of scenarios: Possible scenarios include cross-border situations, interactions between private campus networks and public mobile networks, and accidental synchronization chain breaks or misconfigurations within the mobile network.Measurement techniques: To quantify the effects of non-synchronized cells and using different TDD pattern in neighboring networks, R&S, in collaboration with TU Dresden and Advancing Individual Networks GmbH (AIN), conducted a measurement campaign using movable networks with full control over all network parameters. This campaign measured the effects on uplink and downlink throughput, mapping these to RSSI/RSRP values received at the interfered site.Customer benefits: The available quantification is valuable for predicting and assessing potential interference scenarios before setting up and operating a new cell site.
Sep 11, 2024 | AN-No. 8NT18
Best practices for mobile network testing for business-critical applications
Business-critical infrastructure: Industrial applications require extremely high reliability and availability, as any downtime can result in significant financial losses. Fundamental requirements: Industrial applications often require low latency and even more important a sustainable latency to ensure real-time communication and control. Measurement Techniques: As soon as the radio access network is used, innovative testing methods are needed beforehand to proactively test the network capability and to identify any potential issues. We propose a standard test procedure for the characterization of a network regarding industrial use-cases that covers a representative set of different, common types of network traffic.
Aug 13, 2024 | AN-No. 8NT17
5G NR Reduced Capabilities (RedCap) network scanning
Purpose of RedCap: RedCap is designed for use cases requiring reasonable data throughput, cost-efficient devices, reduced power consumption and smaller device footprint to support applications like wireless industrial sensors, video surveillance and smart wearables in which ultralow latency isn’t essential.Technology basics: Understanding the technology basics helps facing configuration complexities and avoiding potential coexistence issues with regular 5G.RedCap field verification: New mobile network technology introductions like 5G RedCap benefit from field measurements during their typical life-cycle phases (engineering, network roll-out, and operation).Measurement Techniques: In early phases of new technologies, passive network measurements using network scanners are reliable and effective in detecting actual network and cell configurations.
Apr 23, 2024 | AN-No. 8NT13
La pulizia dello spettro (spectrum clearance) destinato alle reti mobili sta diventando un'attività sempre più importante, in quanto gli operatori utilizzano nuove bande che in precedenza contenevano altri servizi. Ciò è particolarmente importante per il lancio delle reti 5G NR. Il 5G NR ha già avviato la diffusione delle reti TDD (Time Division Duplex) in tutto il mondo in un ambiente radio sconosciuto, dove i trasmettitori indesiderati possono creare interferenze in direzione uplink mascherate dai segnali in direzione downlink, rendendo particolarmente impegnativo il rilevamento delle interferenze. Il rilevamento automatico dei segnali interferenti prima dell'accensione di una rete può essere di grande aiuto in aggiunta alle tecniche manuali tradizionali.
apr 19, 2024
Best practices for national regulatory authorities
Key points:Importance of field measurements: Traditional network planning tools and models only offer an estimated view of mobile coverage. Field measurements are conducted under real geographical and load conditions, and therefore provide a more accurate picture and can discover interferences more effectively. Coverage investigations: When deploying a mobile network, operators must adhere to regulatory standards and licensing conditions. As a result, regulatory authorities carry out field measurements on a regular or ad hoc basis to validate compliance or investigate customer complaints. This process identifies coverage gaps and areas of poor network quality, enabling regulatory authorities to take actions to enhance service quality for consumers and guide network expansion.Foster competition: If the field measurements of the coverage and performance are performed on a scale representative of a given country, the transparency of these results can promote healthy competition between operators and better service for consumers, which is essential for economic growth and social development.Measurement Techniques: The harmonized methodology for measuring and evaluating data throughput and QoE based on popular services is described in ETSI TR 103 559.
Apr 15, 2024 | AN-No. 8NT14
P25 and FRMCS scanning
Key points: Critical Infrastructure: Learn about mission-critical communication for various agencies who deal with Public Safety such as first responders, police, firefighters, medics and its crucial role in ensuring safety of society.Reliability of Communication: Understand the challenges posed by mission-critical communication, highlighting performance and reliability needs and special requirements such as safe group communications.Technology Migration: Delve into the migration of mission-critical communication from long-standing narrow-band technologies to broadband use cases considering migration timelines.Measurement Techniques: Explore network measurement methods for passive testing of legacy MCX technologies planned to be used in the networks for quite some time (a later release of the document will focus on the broadband successors)
Mar 12, 2024 | AN-No. 8NT12
Spectrum scans are beneficial for many use-cases such as troubleshooting, interference detection and interference hunting, or verification tasks like scheduler verification or other engineering tasks. A time-gated spectrum scan, which is a power spectrum scan which applies a time gate on uplink/downlink slots/symbols and/or the guard period reveals even more details in uplink/downlink or guard period power spectrum. This allows to focus on the uplink / downlink or guard period power spectrum in 5G NR TDD networks. This educational note explains use cases for spectrum measurements, the complexity in 5G TDD and its technology basics, and which problems can be solved with the described solution. The software used is R&S®ROMES4 together with a R&S®TSMx6 drive and walk test scanner.
Sep 21, 2023 | AN-No. 8NT08
Modern societies worldwide depend on the performance, reliability and security of critical infrastructures and networks. There is a plethora of “new verticals” such as manufacturing, warehouse, mining, ports or other critical infrastructure, just to name a few. These “new vertical” use cases all have one common requirement: the mobile network needs to provide a superior performance compared to a commercial mobile network. In such environments 5G brings new capabilities to build fast and secure campus or private networks tuned to higher performance, which can increase productivity and efficiency. To be successful in these business-critical use cases, the wireless networks need to be as reliable as the wired ones. This educational note describes the different test methods to be able to verify the superior network performance and to help finding root causes of potential problems limiting the performance. We distinguish between passive tests and active tests.
Aug 11, 2023 | AN-No. 8NT09
Da diversi anni, i produttori di veicoli e le agenzie governative cercano modi per aumentare la sicurezza stradale, gestire il traffico in modo efficiente e, in futuro, rendere la guida più comoda, confortevole e sicura. Vehicle-to-everything (V2X) è una tecnologia di informazione e comunicazione di nuova generazione che collega i veicoli a tutto e può supportare questi obiettivi. Un sistema V2X è progettato per offrire comunicazioni a bassa latenza da veicolo a veicolo (V2V), da veicolo a infrastrutture stradali (V2I) e da veicolo a pedone (V2P), per aggiungere una nuova dimensione ai futuri sistemi di assistenza alla guida.Il V2X cellulare (C-V2X) è definito come standard di comunicazione dal 3GPP nella Release 14 e utilizza la tecnologia LTE come interfaccia fisica per le comunicazioni.Lo scanner LTE C-V2X offre ai clienti l'opportunità di verificare, testare e ottimizzare i sistemi di traffico ITS in fase di implementazione o già consolidati. Lo scanner riesce a raggiungere questo obiettivo ascoltando passivamente i messaggi PC (5,9 GHz) trasmessi da RSU (unità a bordo strada), veicoli o qualsiasi altro dispositivo abilitato a C-V2X. Le misure tradizionali dello scanner relative alla potenza e alla qualità del segnale RF, come RSRP, RS-CINR e RSSI, sono fornite per ciascun canale fisico (PSCCH e PSSCH) e per il contenuto del messaggio ITS decodificato per tutte e tre le regioni (Nord America, UE e Cina).
ott 21, 2022 | AN-No. 8NT07
Creare e simulare dettagliatamente diverse condizioni di traffico per la verifica della connettività cellulare V2X (C-V2X)
giu 30, 2022
Affinché le applicazioni NB-IoT funzionino correttamente, è necessario che la rete abbia una copertura sufficiente. Per garantire connessioni affidabili alle applicazioni NB-IoT, la copertura della rete deve essere misurata accuratamente. Rohde & SchwarzMobile Network Testing offre un'esclusiva soluzione di test combinata che permette di misurare accuratamente la copertura del segnale nella direzione downlink (DL) utilizzando degli scanner di rete. Misura l'interazione tra il dispositivo e la rete, il comportamento nella direzione uplink (UL), il protocollo, il carico di segnalazione e l'efficienza energetica durante le comunicazioni utilizzando dispositivi NB-IoT connessi al sistema R&S®ROMES.
feb 20, 2018
Le soluzioni di test per reti mobili Rohde & Schwarz consentono agli operatori di aumentare la capacità delle reti in modo efficiente tramite funzionalità correlate all'hardware, quali l'ottimizzazione dell'inclinazione dell'antenna, l'aggregazione delle portanti, la ricetrasmissione parallela MIMO 4x4 e le celle a 6 settori.
ago 09, 2016