Feasibility of deploying wireless Internet of Things in the unlicensed European 865-868MHz band

Mads Lauridsen, Frank Frederiksen, Ignacio Rodriguez

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Resumé

The European Commission has made the unlicensed 865-868MHz band available for deployment of wireless Internet of Things. The band is mainly used by RFID systems, but the current activity levels are unknown. In this paper, the in-band power levels are measured in five areas. The measurements show that RFID interrogators emit high-power single tone-like signals in four subbands, when active. Most signals are 0.4 s long, but it differs whether the subbands are used in a coordinated way or not. In some areas the RFID systems use a single subband about 80% of the time, while in other areas two to three subbands are occupied simultaneously 65-80% of the time. The measurements are used to evaluate the performance of a narrowband wireless Internet of Things technology, if it were to be deployed in the 865-868MHz band. Specifically, the measurements serve as interference input in a calculation of error rate probability. If the least interfered subband is always selected for the wireless Internet of Things transmission the error rate is 0%for desired signals up to −115 dBm, while if the subband with highest average interference is used, the error rate is up to 7.5% and at least 25% at −100 dBm and −120 dBm, respectively.
OriginalsprogEngelsk
TidsskriftProceedings of the IEEE Wireless Communications and Networking Conference
ISSN1525-3511
StatusUdgivet - 16 apr. 2019
BegivenhedIEEE Wireless Communications and Networking Conference 2019: Touch through Wireless - Marrakech, Marokko
Varighed: 15 apr. 201918 apr. 2019
https://wcnc2019.ieee-wcnc.org/

Konference

KonferenceIEEE Wireless Communications and Networking Conference 2019
LandMarokko
ByMarrakech
Periode15/04/201918/04/2019
Internetadresse

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Radio frequency identification (RFID)
Internet of things

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    title = "Feasibility of deploying wireless Internet of Things in the unlicensed European 865-868MHz band",
    abstract = "The European Commission has made the unlicensed 865-868MHz band available for deployment of wireless Internet of Things. The band is mainly used by RFID systems, but the current activity levels are unknown. In this paper, the in-band power levels are measured in five areas. The measurements show that RFID interrogators emit high-power single tone-like signals in four subbands, when active. Most signals are 0.4 s long, but it differs whether the subbands are used in a coordinated way or not. In some areas the RFID systems use a single subband about 80{\%} of the time, while in other areas two to three subbands are occupied simultaneously 65-80{\%} of the time. The measurements are used to evaluate the performance of a narrowband wireless Internet of Things technology, if it were to be deployed in the 865-868MHz band. Specifically, the measurements serve as interference input in a calculation of error rate probability. If the least interfered subband is always selected for the wireless Internet of Things transmission the error rate is 0{\%}for desired signals up to −115 dBm, while if the subband with highest average interference is used, the error rate is up to 7.5{\%} and at least 25{\%} at −100 dBm and −120 dBm, respectively.",
    keywords = "IoT, RFID, mesurements, interference, performance, ISM",
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    Feasibility of deploying wireless Internet of Things in the unlicensed European 865-868MHz band. / Lauridsen, Mads; Frederiksen, Frank; Rodriguez, Ignacio.

    I: Proceedings of the IEEE Wireless Communications and Networking Conference, 16.04.2019.

    Publikation: Bidrag til tidsskriftKonferenceartikel i tidsskriftForskningpeer review

    TY - GEN

    T1 - Feasibility of deploying wireless Internet of Things in the unlicensed European 865-868MHz band

    AU - Lauridsen, Mads

    AU - Frederiksen, Frank

    AU - Rodriguez, Ignacio

    PY - 2019/4/16

    Y1 - 2019/4/16

    N2 - The European Commission has made the unlicensed 865-868MHz band available for deployment of wireless Internet of Things. The band is mainly used by RFID systems, but the current activity levels are unknown. In this paper, the in-band power levels are measured in five areas. The measurements show that RFID interrogators emit high-power single tone-like signals in four subbands, when active. Most signals are 0.4 s long, but it differs whether the subbands are used in a coordinated way or not. In some areas the RFID systems use a single subband about 80% of the time, while in other areas two to three subbands are occupied simultaneously 65-80% of the time. The measurements are used to evaluate the performance of a narrowband wireless Internet of Things technology, if it were to be deployed in the 865-868MHz band. Specifically, the measurements serve as interference input in a calculation of error rate probability. If the least interfered subband is always selected for the wireless Internet of Things transmission the error rate is 0%for desired signals up to −115 dBm, while if the subband with highest average interference is used, the error rate is up to 7.5% and at least 25% at −100 dBm and −120 dBm, respectively.

    AB - The European Commission has made the unlicensed 865-868MHz band available for deployment of wireless Internet of Things. The band is mainly used by RFID systems, but the current activity levels are unknown. In this paper, the in-band power levels are measured in five areas. The measurements show that RFID interrogators emit high-power single tone-like signals in four subbands, when active. Most signals are 0.4 s long, but it differs whether the subbands are used in a coordinated way or not. In some areas the RFID systems use a single subband about 80% of the time, while in other areas two to three subbands are occupied simultaneously 65-80% of the time. The measurements are used to evaluate the performance of a narrowband wireless Internet of Things technology, if it were to be deployed in the 865-868MHz band. Specifically, the measurements serve as interference input in a calculation of error rate probability. If the least interfered subband is always selected for the wireless Internet of Things transmission the error rate is 0%for desired signals up to −115 dBm, while if the subband with highest average interference is used, the error rate is up to 7.5% and at least 25% at −100 dBm and −120 dBm, respectively.

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    KW - interference

    KW - performance

    KW - ISM

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