An Initial Access Optimization Algorithm for millimeter Wave 5G NR Networks

The millimeter wave (mmWave) communication uses directional antennas. Hence, achieving fine alignment of transmit and receive beams at the initial access phase is quite challenging and time-consuming. In this paper, we provide a dynamic-weight based beam sweeping direction and synchronization signal block (SSB) allocation algorithm to optimize the cell search of the initial access in mmWave 5G NR networks. The number of SSBs transmitted in each beam sweeping direction depends on previously learned experience which is based on the number of detected UEs (user equipment) per SSB for each sweeping direction. Overall, numerical simulation results indicate that the proposed algorithm is shown to be capable of detecting more users with a lower misdetection probability. Furthermore, it is possible to achieve the same performance with a smaller number of dynamic resource (i.e., SSB) allocation, compared to constant resource allocation.

Authors:
Perera A. Indika, Manosha K. B. Shashika, Rajatheva Nandana, Latva-aho Matti

Publication type:
A4 Article in conference proceedings

Place of publication:
91st IEEE Vehicular Technology Conference, VTC Spring 2020

Keywords:
beam sweeping, cell search, mmWave, SSB, UPA

Published:

Full citation:
A. I. Perera, K. B. S. Manosha, N. Rajatheva and M. Latva-aho, “An Initial Access Optimization Algorithm for millimeter Wave 5G NR Networks,” 2020 IEEE 91st Vehicular Technology Conference (VTC2020-Spring), Antwerp, Belgium, 2020, pp. 1-6, doi: 10.1109/VTC2020-Spring48590.2020.9128625

DOI:
https://doi.org/10.1109/VTC2020-Spring48590.2020.9128625

Read the publication here:
http://urn.fi/urn:nbn:fi-fe202102185273