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An Opportunistic Coexistence Analysis of LTE and Wi-Fi in Unlicensed 5 GHz Frequency Band

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Abstract

Current and future cellular networks are expected to deliver increased data performance to meet increasingly exponential customer needs. Because of the heterogeneity of future devices and technologies available today, high quality and efficient communication is the challenge for LTE networks. The licensed bandwidth of LTE is used according to standard rules. The unlicensed bandwidth to handle network traffic must expand its bandwidth and increase the data rates. The 5 GHz unlicensed band is most effective and suitable. However, this 5 GHz band has Wi-Fi and frequency coordination of both LTE and Wi-Fi networks during sharing of spectrum. Here the spectrum is shared among the LTE and WiFi network and access 5 GHz unlicensed band. In particular, it affects Wi-Fi performance through downlink transmission of LTE. In this research article, an experimental findings and analysis in 5 GHz frequency spectrum, presented that LTE affects the performance of the Wireless Fidelity network and that to achieve optimal coexistence, a true frequency difference must be maintained.

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Abbreviations

LTE:

Long term evolution

LTE-U:

Long term evolution-unlicensed

LTE-A:

Long term evolution-advanced

eNB:

Evolved node B

Wi-Fi:

Wireless fidelity

FDD:

Frequency division duplexing

TDD:

Time division duplexing

CA:

Carrier aggregation

CSMA:

Carrier sense multiple access

CSCC:

Common spectrum coordination channel

TDMA:

Time division multiple access

ISM:

Industrial, scientific, medical

U-NII:

Unlicensed national information infrastructure

GSM:

Global system for mobile communication

DVB-T:

Digital video broadcast-terrestrial

3GPP:

Third generation partnership project

DFS:

Dynamic frequency selection

LBT:

Listen before talk

LAA:

License assisted access

CCA:

Clear channel estimate

NRB:

Number of resource blocks

UDP:

User datagram protocol

RTT:

Round trip time

ICMP:

Internet control message protocol

USRP:

Universal radio peripheral software

RF:

Radio frequency

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Authors and Affiliations

  1. ETCE Engineering, Sathyabama Institute of Science and Technology, Chennai, 600119, TN, India

    Bhausaheb Eknath Shinde & V. Vijayabaskar

  2. E&TC Engineering, Dhole Patil College of Engineering, Pune, 412207, Maharashtra, India

    Bhausaheb Eknath Shinde

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  1. Bhausaheb Eknath Shinde
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  2. V. Vijayabaskar
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Shinde, B.E., Vijayabaskar, V. An Opportunistic Coexistence Analysis of LTE and Wi-Fi in Unlicensed 5 GHz Frequency Band. Wireless Pers Commun 130, 269–280 (2023). https://doi.org/10.1007/s11277-023-10284-9

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