reduced in the second embodiment the manner in which communication bands are allocated is changed fig7 shows a control sequence illustrating the flow of data in the wireless communication system according to the second embodiment of the invention fig8 shows a block diagram of band allocation in the present wireless communication system which corresponds to fig2 a wireless lan can be constructed by using the present wireless communication system in the same manner as described in fig3 referring to fig7 it is assumed that the base station 30 mobile station 40 a mobile station lt 1 gt mobile station 40 b mobile station lt 2 gt and mobile station 40 c mobile station lt 3 gt all have their communication lines open 80 the mobile station 40 c mobile station lt 3 gt transmits a communication band request 81 to the base station the mobile station 40 a mobile station lt 1 gt transmits a communication band request 82 to the mobile station 40 b mobile station lt 2 gt in response to these band requests the central control unit 31 allocates a band 92 band d 1 and a band 93 band u 1 as communication bands between the base station 30 and the mobile station 40 c mobile station lt 3 gt 83 the central control unit 31 also allocates a.