| 摘要 |
It is possible to provide a radio communication relay device, a radio communication base station device, a radio communication system, and a radio communication method which can effectively use resources and suppress a data delay and system complexity. When a terminal starts an upstream communication with a base station via a repeater in ST403, the base station simultaneously allocates to the terminal, a resource for an initial transmission and a resource for a retransmission by using Grant 1. If the repeater successfully receives UL data transmitted from the terminal in ST404, the repeater relays, in ST406, the UL data transmitted from the terminal, to the base station by using the resource for retransmission which has been allocated to the terminal.
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