BASE STATION, TERMINAL, COMMUNICATION SYSTEM, COMMUNICATION METHOD, AND INTEGRATED CIRCUIT

摘要

In a wireless communication system in which a base station and a terminal communicate, the base station effectively transmits control information for the terminal.;The base station that communicates with the terminal by using resource elements configured with OFDM symbols and subcarriers, and resource block pairs configured with a predetermined number of resource elements includes a second control channel generation unit that generates a second control channel which is transmitted by using a reference signal of an antenna port different from an antenna port of a first control channel. The second control channel is configured with predetermined E-REGs, and transmitted to the terminal, by using one or more E-CCEs. The resource block pair is configured with a predetermined number of E-REG sets. The E-REG set is configured with a predetermined number of the E-REGs. The E-REG is configured with a predetermined number of resource elements.

主权项

1. A communication system in which a base station device and a terminal device communicate by using a plurality of resource block pairs of which each is configured with a plurality of resource elements of which each is defined in a time domain and a frequency domain,
wherein an enhanced physical control channel used in communication between the base station device and the terminal device is configured with one or more enhanced control channel elements, wherein the enhanced control channel element is configured with a plurality of enhanced resource element groups, wherein the enhanced resource element groups are mapped to respective resource elements, wherein the mapping uses one type of sequence of numbers which are assigned to respective resource elements constituting the resource block pair, and correspond to numbers indicating the enhanced resource element groups, wherein a distributed mapping in which the respective enhanced control channel elements are mapped to the plurality of resource block pairs, or a localized mapping in which the respective enhanced control channel elements are mapped to the one resource block pair are available, wherein in the distributed mapping, the enhanced control channel element is mapped by using a different number, which is one of the numbers, for each resource block pair, in each of the plurality of resource block pairs used in transmission of the respective enhanced control channel elements, wherein in the localized mapping, the enhanced control channel elements are mapped by using the plurality of numbers, in the one resource block pair used in transmission of the respective enhanced control channel elements, wherein the number used in mapping of the enhanced control channel elements is common in the distributed mapping and the localized mapping, wherein the base station device generates the enhanced physical control channel based on the mapping, and transmits the enhanced physical control channel to the terminal device, and wherein the terminal device receives the enhanced physical control channels based on the mapping.