Patent ID: 7983664
Filing Date: 2011-07-19
Classification: H04W

Abstract:
1. A transmission method for sending a radio signal to a first zone and a second zone adjacent to each other, in one or more wireless base stations, the transmission method comprising: sending the radio signal to the first zone in a first time slot by using a first group of frequencies and sending the radio signal to the second zone by using a second group of frequencies, not including the same frequency as in the first group of frequencies; sending the radio signal to a third zone in a second time slot by using a third group of frequencies, including more frequencies than the first group of frequencies, and sending the radio signal to a fourth zone by using a fourth group of frequencies, including more frequencies than the second group of frequencies and including the same frequency as in the third group of frequencies at least; and shifting the third zone and the fourth zone from the direction of a boundary of the first zone and the second zone, forming the third zone by the beam width of which is narrower than a beam for the first zone, and forming the fourth zone by the beam width of which is narrower than a beam for the second zone.