Patent ID: 7944850
Filing Date: 2011-05-17
Classification: H04L,H04W

Abstract:
1. In a mobile communication system in which performing persistent scheduling which a downlink data to be periodically transmitted is transmitted via a downlink data channel by using a transmission format known to a user equipment, a base station performing a radio communication with the user equipment, comprising: a transmission format determining unit configured to change a transmission format known to the user equipment, based on a downlink reception signal quality measured by the user equipment; a notification unit configured to notify, to the user equipment, the transmission format changed by the transmission format determining unit; and a transmitting unit configured to transmit downlink data to the user equipment via the downlink data channel, by using the transmission format changed by the transmission format determining unit, wherein the transmitting unit is configured to transmit the downlink data via the downlink data channel, in a first cyclic period, and the notification unit is configured to notify, to the user equipment, the transmission format changed by the transmission format determining unit, by using the control channel, in a second cyclic period that is longer than the first cyclic period.