Patent ID: 8830965

Claim:
A radio communication method implemented in radio networks having a plurality of cells which connect radio base stations and radio terminal stations in receiving and transmitting packet signals, in which each of the radio base stations uses a plurality of antennas to simultaneously receive and transmit packet signals with each of the radio terminal stations via spatial multiplexing, said radio communication method comprising: when a radio base station of a first cell receives a packet signal transmitted from a radio base station of a second cell located in a periphery of the first cell, the radio base station of the first cell stores an address included in the received packet signal; when the radio base station of the first cell transmits a packet signal, the radio base station of the first cell transmits a call signal, serving as a control signal, which includes a destination address of the packet signal as well as an address of a radio terminal station of the second cell or an address of the radio base station of the second cell, wherein a radio terminal station of the first cell specified by the call signal as well as the radio terminal station or the radio base station of the second cell specified by the call signal transmit a response signal; upon receiving the response signal, the radio base station of the first cell performs channel estimation on the radio terminal station of the first cell as well as the radio terminal station or the radio base station of the second cell, wherein, based on an estimation result, the radio base station of the first cell performs spatial multiplexing transmission towards the radio terminal station of the first cell, which is a destination of the packet signal, while creating a null point, relative to an antenna directivity, in a direction towards the radio terminal station or the radio base station of the second cell.