Coexistence of Multi-Carrier Listen Before Talk (LBT) Mechanisms for LTE-Licensed Assisted Access (LAA) in Unlicensed Spectrums 


Vol. 43,  No. 12, pp. 2041-2047, Dec.  2018
10.7840/kics.2018.43.12.2041


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  Abstract

Licensed-Assisted Access (LAA) is the new feature of 3GPP Long-Term Evolution (LTE) that utilizes unlicensed bands as a means of providing additional bandwidth to aggregate. An important consideration for LTE’s operation in unlicensed spectrum is to guarantee fair coexistence with other incumbent systems such as Wi-Fi and other LAA cells/users. For this purpose, LAA’s Clear Channel Assessment (CCA) has been designed based on Listen-before-Talk (LBT) and verified to support fair access with Wi-Fi through extensive simulation studies. However, coexistence between different LBT options for multi-carrier operation has not been studied yet. Since different LAA operators may use individual LBT options, their coexistence could also be a serious issue. In this paper, we study the coexistence problem of different LBT options available for multi-carrier operation in unlicensed bands through extensive simulation in terms of system throughput, channel occupancy rate and delay.

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  Cite this article

[IEEE Style]

L. H. Vu and J. Yun, "Coexistence of Multi-Carrier Listen Before Talk (LBT) Mechanisms for LTE-Licensed Assisted Access (LAA) in Unlicensed Spectrums," The Journal of Korean Institute of Communications and Information Sciences, vol. 43, no. 12, pp. 2041-2047, 2018. DOI: 10.7840/kics.2018.43.12.2041.

[ACM Style]

Long Hoang Vu and Ji-Hoon Yun. 2018. Coexistence of Multi-Carrier Listen Before Talk (LBT) Mechanisms for LTE-Licensed Assisted Access (LAA) in Unlicensed Spectrums. The Journal of Korean Institute of Communications and Information Sciences, 43, 12, (2018), 2041-2047. DOI: 10.7840/kics.2018.43.12.2041.

[KICS Style]

Long Hoang Vu and Ji-Hoon Yun, "Coexistence of Multi-Carrier Listen Before Talk (LBT) Mechanisms for LTE-Licensed Assisted Access (LAA) in Unlicensed Spectrums," The Journal of Korean Institute of Communications and Information Sciences, vol. 43, no. 12, pp. 2041-2047, 12. 2018. (https://doi.org/10.7840/kics.2018.43.12.2041)

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pISSN : 1226 - 4717
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