Channel Occupancy Measurements in 868 MHz ISM Band in Residential Areas
The rapid development of Internet of Things (IoT) has led to more and more devices using ISM frequency bands. Because they are not time synchronized, medium access collisions are unavoidable. The probability of such a collision is usually reasonably low; however, it increases with the number of tran...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-11-01
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| Series: | Sensors |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1424-8220/21/23/7805 |
| _version_ | 1827674635602231296 |
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| author | Sebastian Kozłowski Krzysztof Kurek |
| author_facet | Sebastian Kozłowski Krzysztof Kurek |
| author_sort | Sebastian Kozłowski |
| collection | DOAJ |
| description | The rapid development of Internet of Things (IoT) has led to more and more devices using ISM frequency bands. Because they are not time synchronized, medium access collisions are unavoidable. The probability of such a collision is usually reasonably low; however, it increases with the number of transmitters competing for the same frequency channel. For this reason, ISM bands’ occupancy is regularly monitored by researchers. This paper presents the results of the measurement campaign during which a selected part of the 868 MHz ISM frequency band was monitored for the presence of transmissions in six locations in various residential areas in Warsaw, Poland. For the purpose of the campaign, a dedicated measurement set-up comprising a software-defined radio (SDR) module was assembled. The measurements results showed that the channel occupancy is in most cases lower than 1% with a maximum observed value of 2%. The paper presents selected characteristics of the detected signals. Additionally, distribution over time of the detected signals was used together with the Monte Carlo simulations to analyze how long idle time blocks are available for new transmitters that could be deployed in the band under testing. |
| first_indexed | 2024-03-10T04:45:06Z |
| format | Article |
| id | doaj.art-148881bca61d4d8eb567dc5a911a1db2 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T04:45:06Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-148881bca61d4d8eb567dc5a911a1db22023-11-23T02:59:27ZengMDPI AGSensors1424-82202021-11-012123780510.3390/s21237805Channel Occupancy Measurements in 868 MHz ISM Band in Residential AreasSebastian Kozłowski0Krzysztof Kurek1Institute of Radioelectronics and Multimedia Technology, Warsaw University of Technology, ul. Nowowiejska 15/19, 00-665 Warsaw, PolandInstitute of Radioelectronics and Multimedia Technology, Warsaw University of Technology, ul. Nowowiejska 15/19, 00-665 Warsaw, PolandThe rapid development of Internet of Things (IoT) has led to more and more devices using ISM frequency bands. Because they are not time synchronized, medium access collisions are unavoidable. The probability of such a collision is usually reasonably low; however, it increases with the number of transmitters competing for the same frequency channel. For this reason, ISM bands’ occupancy is regularly monitored by researchers. This paper presents the results of the measurement campaign during which a selected part of the 868 MHz ISM frequency band was monitored for the presence of transmissions in six locations in various residential areas in Warsaw, Poland. For the purpose of the campaign, a dedicated measurement set-up comprising a software-defined radio (SDR) module was assembled. The measurements results showed that the channel occupancy is in most cases lower than 1% with a maximum observed value of 2%. The paper presents selected characteristics of the detected signals. Additionally, distribution over time of the detected signals was used together with the Monte Carlo simulations to analyze how long idle time blocks are available for new transmitters that could be deployed in the band under testing.https://www.mdpi.com/1424-8220/21/23/7805IoTchannel occupancyISM band |
| spellingShingle | Sebastian Kozłowski Krzysztof Kurek Channel Occupancy Measurements in 868 MHz ISM Band in Residential Areas Sensors IoT channel occupancy ISM band |
| title | Channel Occupancy Measurements in 868 MHz ISM Band in Residential Areas |
| title_full | Channel Occupancy Measurements in 868 MHz ISM Band in Residential Areas |
| title_fullStr | Channel Occupancy Measurements in 868 MHz ISM Band in Residential Areas |
| title_full_unstemmed | Channel Occupancy Measurements in 868 MHz ISM Band in Residential Areas |
| title_short | Channel Occupancy Measurements in 868 MHz ISM Band in Residential Areas |
| title_sort | channel occupancy measurements in 868 mhz ism band in residential areas |
| topic | IoT channel occupancy ISM band |
| url | https://www.mdpi.com/1424-8220/21/23/7805 |
| work_keys_str_mv | AT sebastiankozłowski channeloccupancymeasurementsin868mhzismbandinresidentialareas AT krzysztofkurek channeloccupancymeasurementsin868mhzismbandinresidentialareas |