Patent ID: 9641291
Date: 2017-05-02
CPC Classifications: H04L,H04W

Claim:
1. An integrated circuit comprising: controlling circuitry, which, in operation, allocates a communication band to a user equipment, 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 transmitting circuitry, which, in operation, controls transmission in the first component carrier on a Physical Downlink Shared Channel (PDSCH), to the user equipment, of information including both: (i) first information, based on which the user equipment is operative to set a reference frequency of the communication band, and (ii) second information, based on which the user equipment is operative to acquire a Physical Downlink Control Channel (PDCCH) in the second component carrier, whereby the user equipment is operative 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 transmit a response signal in the second component carrier responsive to an uplink data signal.