Patent ID: 8040842

Claim:
A radio communication system for performing relay communication by radio, comprising: a plurality of radio base stations each comprising a scheduler to arrange a schedule of assignment of a slot into which data is to be inserted in a radio frame; a terminal to perform communication with at least one of the radio base stations through a connection; and a relay station to perform relay forwarding of the radio frame exchanged through the connection, the relay station comprising a scheduler control section to give an instruction of the schedule to the scheduler, wherein the scheduler control section gives the instruction to the scheduler so as not to generate duplicate slot assignment, in which the whole or a part of data is assigned to the same slot in radio frames to be sent at same timing; wherein the scheduler control section sends a request for determining a switching condition for slot assignment to at least one of the plurality of radio base stations; and once the scheduler receives the request for determining a switching condition, negotiation is made among the plurality of radio base stations to determine the switching condition, and the scheduler performs scheduling according to the switching condition determined among the plurality of radio base stations, so as not to generate the duplicate slot assignment when the radio frame is sent, to implement autonomous slot assignment among the plurality of radio base stations.