Base station, terminal, band allocation method, and downlink data communication method

摘要

Provided are a base station, a terminal, a band allocation method, and a downlink data communication method with which bands can be efficiently allocated. In a base station in which a plurality of unit bands can be allocated to a single communication, when a data receiver acquires terminal capability information transmitted by a terminal in the initial access unit band and the bandwidth available for communication indicated by the terminal capability information can accommodate a plurality of unit bands, a unit band group which includes the initial access unit band as well as the unit bands adjacent thereto is allocated to the terminal, and a communication band movement indication, which indicates the movement of the center frequency in the communication band of the terminal toward the center frequency in the unit band group, is transmitted to the terminal using the initial access unit band.

主权项

1. An integrated circuit comprising:
communication circuitry, which, in operation, controls receiving information including both: (i) first information related to a reference frequency of a communication band, the communication band including a first component carrier and a second component carrier added to the first component carrier, in which a synchronization signal is mapped around a center of each of the first component carrier and the second component carrier, and (ii) second information used for determining the second component carrier, said information including both the first information and the second information being received in the first component carrier on a Physical Downlink Shared Channel (PDSCH), and control circuitry, which, in operation, controls setting the reference frequency of the communication band based on the first information, to acquire a Physical Downlink Control Channel (PDCCH) in the second component carrier based on the second information, and to perform communication simultaneously on the first component carrier and the second component carrier, wherein the second information includes a downlink frequency bandwidth of the second component carrier, a number of antennas for use in the second component carrier, and resources used to receive a response signal in the second component carrier responsive to an uplink data signal.