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The exponential increase of global mobile data traffic requires future 5G system. Millimeter Waveform (mmWave) band is being considered as a candidate for new radio bands for 5G systems. In this paper, we present beam-forming technology on patch antenna array to cope path loss of mmWave band. In order to reduce the interference between beams and to compensate for this problems of limitation of user number, we proposed beam group method and GMPS(Group based MultiLevel Packet Scheduling) in 5G system based multi-beam. This paper evaluates performance of the GMPS in beam-forming system through the system level simulation.

Millimeter wave technology is major candidate technology for 5G network. Because of the high path loss characteristics of the mmWave system, beamforming technique is necessary to overcome this high path loss. Beamforming technology cannot achieve perfect beam alignment and it leads to degradation of the channel gain between the transceiver. Thus, we examine a gain degradation effect due to beam misalignment on mmWave beamforming system. We generated the channel coefficients by using QuaDRiGa channel model implementation. The channel gain analysis results shows that the misalignment of the BS beam causes high channel gain degradation.