Performance comparison of 802.11mc and 802.11az Wi-Fi Fine Time Measurement protocols
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866915632834936832 |
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| author | Rajendran, Govind Sharma, Kushagra Chetlapalli, Vijayalakshmi Parekh, Jatin |
| author_facet | Rajendran, Govind Sharma, Kushagra Chetlapalli, Vijayalakshmi Parekh, Jatin |
| contents | The need for meter level location accuracy is driving increased adoption of 802.11 mc/az Fine Time Measurement (FTM) based ranging in Wi-Fi networks. In this paper, we present a comparative study of the ranging accuracy of 802.11mc and 802.11az protocols. We examine by real world measurements the critical parameters that influence the accuracy of FTM {\it{viz.,}} channel width, interference, radio environment, and offset calibration. The measurements demonstrate that meter-level ranging accuracy can be consistently attained in line of sight environment on 80 MHz and 160 MHz channels, while an accuracy of about 5m is obtained in non-line of sight environment. It is observed that the 802.11az protocol is capable of providing better accuracy than 802.11mc even in a multipath heavy environment. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_17935 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Performance comparison of 802.11mc and 802.11az Wi-Fi Fine Time Measurement protocols Rajendran, Govind Sharma, Kushagra Chetlapalli, Vijayalakshmi Parekh, Jatin Networking and Internet Architecture The need for meter level location accuracy is driving increased adoption of 802.11 mc/az Fine Time Measurement (FTM) based ranging in Wi-Fi networks. In this paper, we present a comparative study of the ranging accuracy of 802.11mc and 802.11az protocols. We examine by real world measurements the critical parameters that influence the accuracy of FTM {\it{viz.,}} channel width, interference, radio environment, and offset calibration. The measurements demonstrate that meter-level ranging accuracy can be consistently attained in line of sight environment on 80 MHz and 160 MHz channels, while an accuracy of about 5m is obtained in non-line of sight environment. It is observed that the 802.11az protocol is capable of providing better accuracy than 802.11mc even in a multipath heavy environment. |
| title | Performance comparison of 802.11mc and 802.11az Wi-Fi Fine Time Measurement protocols |
| topic | Networking and Internet Architecture |
| url | https://arxiv.org/abs/2511.17935 |