s 2 c the mobile terminal 11 communicates with the ncc 13 in the fine sync at step s 203 if the ncc 13 couldn 39 t receive a satellite access control sac field which is a field indicating control information from the mobile terminal 11 for connecting with the satellite 12 at step s 204 the ncc 13 assumes that the mobile terminal 11 exists in the nlos region and reallocates resources allocated by the cra that is optimizes the cra capacity thereafter at step s 205 if the mobile terminal 11 does not return from the nlos region in t a at step s 206 the ncc 13 collects resources allocated by the cra at step s 2 c if the mobile terminal 11 returns from the nlos region in t a the mobile terminal 11 maintains the fine sync herein though the mobile terminal 11 returned from the nlos region the ncc 13 does not start collecting resources until t a so that the mobile terminal 11 could immediately restart receiving data at the speed of x j in fig3 in the fine sync when the mobile terminal 11 returns in the fine sync at step s 207 if the mobile terminal 11 didn 39 t return in t b from the nlos region at step s 208 the ncc 13 converts state of the mobile terminal 11 into.