Radio resource management for multi-beam operating mobile communications

In order to accommodate emerging mobile data traffic, millimeter-wave band is considered for 5th generation (5G) mobile communication systems. However, the millimeter-wave signal has poor propagation characteristics compared with those for current mobile communication systems. Therefore, beamforming is essential to utilize millimeter-wave band for 5G mobile communication systems. Furthermore, massive antenna structure makes to operating multi-beam for reusing radio resource spatially. However, in the multi-beam operating mobile communication systems, there is a severe interference between neighboring beams and traffic load can be concentrated on partial beams. In order to solve these problems, there are many researches for coordinated scheduling. However, resource allocation of 4th generation (4G) mobile communication systems is not suitable for multi-beam based mobile system because it allocates radio resource without considering other resources and UEs. In order to improving system performance, we proposed a novel radio resource allocation scheme for multi-beam based mobile systems which consider all beams´ radio resource together. With proposed scheme, it is possible to reduce underutilized radio resources and improve spectral efficiency. In this paper, we proposed an efficient radio resource allocation scheme for multi-beam and evaluate the performance of the proposed scheme.