  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.
