Enhanced Random Access Process Using Beam-Switching Techniques in 5G Networks 


Vol. 46,  No. 1, pp. 61-65, Jan.  2021
10.7840/kics.2021.46.1.61


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  Abstract

In a conventional Random Access (RA) process which uses the beamforming techniques, User Equipments (UEs) transmit preamble messages through a beam-switching method, and the Connection Request (Msg3) message through an optimal up-link beam determined during the preamble message transmission. In the conventional process, UEs cannot avoid a Msg3 collision when they select the same preamble and transmit the Msg3 at the same resource with the other UEs. Furthermore, perceiving the Msg3 collision, UEs perform a re-access procedure from selecting a new preamble to transmit the Msg3 at other resources. In this paper, we propose an enhanced RA process, which transmits preamble messages through a random beam-sweeping method and Msg3 through a random beam-switching method. In the proposed process, UEs which have selected the same preamble can avoid the Msg3 collision since they can transmit the optimal up-link beam containing the Msg3 at different times. Additionally, for the message collision, UEs perform the re-access procedure from the Msg3 retransmission since the Msg3 collision can be avoid by changing the beam-switching sequence. We confirm the performance of the proposed RA process by the simulation.

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  Cite this article

[IEEE Style]

J. Won, K. M. Kim, T. Lee, "Enhanced Random Access Process Using Beam-Switching Techniques in 5G Networks," The Journal of Korean Institute of Communications and Information Sciences, vol. 46, no. 1, pp. 61-65, 2021. DOI: 10.7840/kics.2021.46.1.61.

[ACM Style]

Jun-Woo Won, Kyoung Min Kim, and Tae-Jin Lee. 2021. Enhanced Random Access Process Using Beam-Switching Techniques in 5G Networks. The Journal of Korean Institute of Communications and Information Sciences, 46, 1, (2021), 61-65. DOI: 10.7840/kics.2021.46.1.61.

[KICS Style]

Jun-Woo Won, Kyoung Min Kim, Tae-Jin Lee, "Enhanced Random Access Process Using Beam-Switching Techniques in 5G Networks," The Journal of Korean Institute of Communications and Information Sciences, vol. 46, no. 1, pp. 61-65, 1. 2021. (https://doi.org/10.7840/kics.2021.46.1.61)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880