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Coexistence of Wi-Fi and LTE-LAA Networks: Open Issues

  • DATA TRANSMISSION IN COMPUTER NETWORKS
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Abstract—An increase in the network capacity is a requirement for modern LTE cellular networks. A part of the RF spectrum that is available for transmission is among the most important limiting factors. Such a problem can be solved in the LTE networks using unlicensed bands that are employed in alternative (e.g., Wi-Fi) technologies with the aid of a new LTE-LAA technology. In this work, we perform a comparative analysis of the channel access procedures for unlicensed bands that are described in the Wi-Fi standard and LTE-LAA specification and discuss open problems of coexisting technologies.

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Notes

  1. Such a requirement is imposed due to the fact that weather, military, and civil-aviation radars work in the 5 GHz range. A DFS device must detect radar transmission (short periodic pulses) and switch to another (free) channel when the transmission is detected. The previous channel cannot be used over an interval of at least 30 min.

  2. In the new version of the Wi-Fi standard (IEEE 802.11ax) that is being actively developed, the limitation is waived for multiuser transmission. Consequently, a device of the IEEE 802.11ax standard may start data transmission in an arbitrary set of vacant secondary channels with disregard of the above hierarchy after the end of the backoff procedure in the primary channel.

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ACKNOWLEDGMENTS

This work was supported by the Russian Foundation for Basic Research (project no. 18-07-01223a).

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Authors and Affiliations

  1. Kharkevich Institute for Information Transmission Problems, Russian Academy of Sciences, 127051, Moscow, Russia

    V. A. Loginov, A. I. Lyakhov & E. M. Khorov

  2. National Research University Higher School of Economics, 101000, Moscow, Russia

    E. M. Khorov

Authors
  1. V. A. Loginov
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  2. A. I. Lyakhov
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  3. E. M. Khorov
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Correspondence to V. A. Loginov, A. I. Lyakhov or E. M. Khorov.

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Translated by A. Chikishev

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Loginov, V.A., Lyakhov, A.I. & Khorov, E.M. Coexistence of Wi-Fi and LTE-LAA Networks: Open Issues. J. Commun. Technol. Electron. 63, 1530–1537 (2018). https://doi.org/10.1134/S1064226918120148

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