Interference Coexistence of 5G NR and LTE System Based on 2.1GHz

An, Na; Wang, Cheng; Wang, Weidong

doi:10.1109/iccsn49894.2020.9139105

Cited by 11 publications

(7 citation statements)

References 2 publications

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“…By utilizing 4G network infrastructure, it allows operators to roll out 5G networks faster because the time in building 5G network infrastructure is faster and the coverage is more evenly distributed. Users' smartphones that already support 5G will connect to the 5G network to get faster data speeds but will still use 4G's core network [21]- [23].…”

Section: Introductionmentioning

confidence: 99%

Throughput and Coverage Evaluation on The Use of Existing Cellular Towers for 5G Network in Surakarta City

Affandi,

Riyadi,

Prakoso

2024

J. Ilm. Tek. Elektro Komput. Dan Inform

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Currently, telecommunication operators must deploy 5G networks to cope with the exponential growth in internet-access demand. To minimize capital expenditure, existing 4G cell towers are being used to install new 5G base stations (gNodeB). However, 5G has different key performance indicators (KPI), frequency and bandwidth values, and propagation models compared to 4G hence an evaluation of this approach's effectiveness is needed. This paper analyzes 5G network performance with frequency of 3.5 GHz, bandwidth of 100 MHz, and using existing cellular towers in Surakarta City. The city has a total area of 46.8 km 2 , mostly flat topography and not many tall buildings therefore propagation models with line-of-sight urban macro (UMa) and urban micro (UMi) are representative. KPI parameters for throughput include 75% of the area served with at least 100 Mbps for downlink and at least 50 Mbps for uplink. KPI parameter for signal strength targets at least 90% of the area covered with -100 dBm or higher. Our Atoll simulations show that the optimistic scenario (UMa) produces average throughput of 153.59 Mbps (downlink) and 117.88 Mbps (uplink), 89.43% served with at least 100 Mbps (downlink) and 100% experience at least 50 Mbps (uplink), average signal strength is -83.99 dBm and 79.71% area covered with at least -100 dBm. The pessimistic scenario (UMi) predicts throughput of 141.32 Mbps (downlink) and 117.88 Mbps (uplink), 86.52% provided with at 100 Mbps (downlink) and 100% served with 50 Mbps (uplink), average signal strength of -90.73 dBm and 75.13% area covered with at least -100 dBm. It can be concluded that the 5G network installed at existing 4G towers can conform to KPI parameters on throughput but still experience drawbacks in signal coverage. A non-Standalone 5G network is suitable for early deployment, but gNodeB installation at new locations is needed in the following years.

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Section: Introductionmentioning

confidence: 99%

Throughput and Coverage Evaluation on The Use of Existing Cellular Towers for 5G Network in Surakarta City

Affandi,

Riyadi,

Prakoso

2024

J. Ilm. Tek. Elektro Komput. Dan Inform

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“…Many studies on interference have been conducted in recent years, mainly including interference between 4G and 5G systems [ 9 , 10 , 11 , 12 ], 4G and 4G communication systems [ 13 , 14 , 15 ], satellite service ground station systems and 5G systems [ 16 , 17 , 18 , 19 , 20 ], and LTE and broadcasting systems [ 21 , 22 , 23 ]. In 5G new radio (NR) frequency-division duplexing (FDD) systems that coexist with LTE systems, simulation study is executed to explore the required isolation degree under common and non-common station of the base station [ 9 , 10 , 11 ]. The results show that non-common station scenarios require a higher isolation degree.…”

Section: Introductionmentioning

confidence: 99%

“…The results show that non-common station scenarios require a higher isolation degree. On the basis of [ 9 , 10 , 11 ], the authors of [ 12 ] investigated the interference coexistence of LTE and NR systems using dynamic spectrum sharing (DSS) technology and discovered that LTE neighbor cells have a stronger impact on NR cells. The deterministic analysis method is utilized to investigate coexistence interference between LTE FDD and Time Division Long Term Evolution (TD-LTE) systems, as well as between TD-LTE and Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) systems in [ 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of LTE-M Adjacent Channel Interference in Rail Transit

Wang²,

Zhang

et al. 2022

Sensors

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Long Term Evolution-Metro (LTE-M), as a special communication system for train control, has strict requirements on adjacent channel interference (ACI). According to the 3rd Generation Partnership Project (3GPP) protocol of the European Telecommunications Standards Institute (ETSI) standards, this paper presents the required isolation degree for LTE-M systems to resist ACI. Aiming at the scenario of leaky cable transmission and antenna transmission adopted by the underground LTE-M system of the subway, the isolation degree required for LTE-M system deployment is deduced by combining the channel description with the principle of ACI. For the coexistence of a LTE-M system and an adjacent cellular system in a subway ground scenario, the Monte-Carlo (MC) method is used to simulate several conceivable scenarios of the LTE-M system and the adjacent frequency cellular system. In addition, the throughput loss of the LTE-M system is estimated by considering signal to interference plus noise ratio (SINR). Simulation results demonstrate that adjacent frequency user equipment (UE) has negligible small interference with the LTE-M underground system when using the leaky cable radiation pattern, whereas for the LTE-M ground system, the main interference comes from the adjacent frequency UE to the LTE-M base station (BS). Finally, interference avoidance solutions are presented, which can be utilized as a reference in the design and deployment of LTE-M systems in the rail transit environment.

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“…Co-site interference in the 5G FR1 band is more pronounced compared to the 5G FR2 band due to the coexistence of Long-Term Evolution (LTE) bands [5]. Simulation results for a LTE sub-band of 2.1 GHz indicate that LTE frequencydivision duplexing (FDD) downlink is expected to cause harmful interference to 5G NR FDD downlink in the same band.…”

Section: Introductionmentioning

confidence: 99%

“…Simulation results for a LTE sub-band of 2.1 GHz indicate that LTE frequencydivision duplexing (FDD) downlink is expected to cause harmful interference to 5G NR FDD downlink in the same band. In the case of co-station, an additional 1.16 dB ACIR (Adjacent Channel Interference Ratio) is required for proper communication [5].…”

Section: Introductionmentioning

confidence: 99%

A Low Noise Power Amplifier MMIC to Mitigate Co-Site Interference in 5G Front End Modules

Bajpai¹,

Pampori

Maity

et al. 2021

IEEE Access

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This paper presents a comparative performance analysis of a single-stage GaAs Low-Noise Power Amplifier (LNPA) fabricated in a 0.25 µm pHEMT process to mitigate co-site interference across multiple frequencies in the L-and S-bands. We compare five different designs from 1.2 to 3.8 GHz, each offering a minimum bandwidth of 300 MHz. Designed bandwidth is sufficient to cover several popular 5G NR FR1 channels as well as suitable for carrier aggregation in the LTE bands. An Output 1-dB compression point (OP 1dB ) of 27.5 dBm, noise figure (NF) below 1 dB and an Output 3 rd -order Intercept Point (OIP3) up to 40 dBm is achieved. Adjacent Channel Leakage Ratio (ACLR) measurements are performed at 2.5 GHz with a Peak to Average Power Ratio (PAPR) of 11.8 dB. We achieve an ACLR of -25 dBc at 25 dBm of output power for a 20 MHz, 16-QAM modulation signal, while the corresponding power added efficiency & Drain-efficiency (DE) are, on average, more than 47% & 50% respectively. An integrated Electro-Static-Discharge (ESD) limiter is also incorporated, which can tolerate up to 350 V Human Body Model (HBM) and 125 V Charged Device Model (CDM) without failure. The design occupies a footprint of only 0.325mm 2 .

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Interference Coexistence of 5G NR and LTE System Based on 2.1GHz

Cited by 11 publications

References 2 publications

Throughput and Coverage Evaluation on The Use of Existing Cellular Towers for 5G Network in Surakarta City

Throughput and Coverage Evaluation on The Use of Existing Cellular Towers for 5G Network in Surakarta City

Analysis of LTE-M Adjacent Channel Interference in Rail Transit

A Low Noise Power Amplifier MMIC to Mitigate Co-Site Interference in 5G Front End Modules

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